JP3530456B2 - Body mounting / detaching control method for offset rotary press and body mounting / detaching apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset wheel configured to shorten the rise time and minimize the occurrence of waste paper when restarting the next printing after stopping the printing such as replacement and replacement of printing plates. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder attachment / detachment control method and a cylinder attachment / detachment device for a rolling machine.

[0002]

2. Description of the Related Art FIG. 6 is a schematic side view illustrating a conventional printing cylinder (cylinder) attaching / detaching device in a printing device section installed in an offset rotary press, and FIG. 7 is a time chart showing a control method of the cylinder attaching / detaching device. FIG. 8 is a schematic side view showing one of the printing apparatuses for the offset rotary press, and FIG. 9 is a schematic diagram showing the overall schematic configuration of the offset rotary press.

As shown in FIG. 9, a general offset rotary press has a web feeding device 1 as a main constituent unit.
3, a plurality of sets of printing devices 2a to 2n, a drying device 14, a cooling device 15, a web pass device 16, a folding machine 17 and the like arranged in parallel along the traveling direction of the web 1 are provided.
In addition, the web feeding device section 13 includes an infeed device 25.
However, the cooling device 15 is equipped with a cooling roller 22, the web path device 16 is equipped with a drag roller 23, and the folder 17 is equipped with a nipping roller 24.

With such a configuration, in the conventional rotary offset press, the web 1 supplied from the roll-shaped sheet (rolling paper) installed in the web supply device 13 is arranged in parallel as described above. Each color is printed by sequentially passing through the groups 2a to 2n, and predetermined multicolor printing is performed. After that, it is sent to the drying device 14 and dried, and further sent to the cooling device 15 to be cooled. Subsequently, the web path device 16 and the folding machine 17 are fed in this order to be folded and cut, processed into a desired shape (folding table), and then carried out to the outside.

By the way, a commercial offset rotary press is
BACKGROUND ART Conventionally, a cylinder attaching / detaching device is installed to attach / detach a printing cylinder. For example, as shown in FIG. 6, this cylinder attaching / detaching device includes an upper plate cylinder (printing cylinder) 5a and a lower plate cylinder (printing cylinder).
5b are fixed at predetermined positions respectively, and the upper blanket cylinder (printing cylinder) 8a and the lower blanket cylinder (printing cylinder) 8b are attached and detached, and the blanket cylinders 8a and 8b correspond to each other in association with each other. The structure is such that the plate cylinder 5 can be simultaneously attached and detached. Hereinafter, the blanket cylinders 8a and 8b are denoted by reference numeral 8 when they are not distinguished from each other, and the plate cylinders 5a and 5b are denoted by reference numeral 5 when they are not distinguished from each other.

That is, the printing plate 11 is mounted on the outer periphery of the plate cylinder 5, the inking roller 3 and the watering roller 4 are in contact with the printing plate 11, and the printing ink 19 is applied to the inking roller 3. The dampening water 18 in the dampening water boat is supplied from the water kneading roller 12 to the printing plate 11 via the watering roller 4. A blanket cylinder moving mechanism 9 for moving each blanket cylinder 8, a roller attaching / detaching mechanism 6b for attaching / detaching each inking roller 3, and a roller attaching / detaching mechanism 6a for attaching / detaching each watering roller 4 are provided.

As a method different from that shown in FIG. 6, the cylinder attaching / detaching device has a lower blanket cylinder 8b side, an upper plate cylinder 5a and a lower plate cylinder 5b with respect to a fixed upper blanket cylinder 8a. And the lower blanket cylinder 8b is fixed, and the upper blanket cylinder 8a side and the upper plate cylinder 5a and the lower plate cylinder 5b are configured to be simultaneously installed and removed.

In such a cylinder attaching / detaching device, when printing is stopped, between the upper plate cylinder 5a and the upper blanket cylinder 8a, between the upper blanket cylinder 8a and the lower blanket cylinder 8b, and between the lower blanket cylinder 8b. A predetermined gap is formed between the lower plate cylinder 5b and each of the side plate cylinders 5a and 5b so that the watering roller 4 and the inking roller 3 are separated from each other. Is set not to transfer. It should be noted that forming a gap between the printing cylinders that are joined to each other at the time of printing and separating the roller from the printing cylinder in this way is referred to as a cylinder removal state, and this cylinder removed state is referred to as a cylinder removal state. Contrary to removing the cylinder, joining the cylinders to each other and joining the rollers to the cylinder is called cylinder insertion.

By the way, when the setting of the printing apparatus 2 is changed, such as the replacement of the printing plate 11 by changing the state of the cylinder as described above, and then the printing is resumed, the following is performed through the control unit 10C. Operate (control) as follows. In the initial state, that is, between the blanket cylinder 8 and the plate cylinder 5 installed on the upper and lower sides of the web pass line, between each plate cylinder 5 and the inking roller 3, and between the plate cylinder 5 and the watering roller 4. Between the upper and lower blanket cylinders 8a, 8b, with a predetermined gap formed,
As shown in FIG. 6, first, at a time point t ₁ , the roller attaching / detaching mechanism 6 is
By operating a, the water mixing roller 12 and the watering roller 4 are moved, and the watering roller 4 is pressed against the printing plate 11 wound around the plate cylinder 5. With such a setting, the dampening water 18 of the dampening water boat is sequentially transferred to the water kneading roller 12 and the watering roller 4 and supplied to the printing plate 11.

Next, at time t ₂ , the roller attaching / detaching mechanism 6b is operated to move the inking roller 3, and the inking roller 3 is pressed against the printing plate 11 wound around the plate cylinder 5.
With such a setting, the ink 19 sequentially transferred from the ink fountain and supplied is transferred to the plate 1 via the ink forming roller 3.
1 is supplied. Then at time t _3, the upper and lower sides by operating the blanket cylinder moving mechanism 9 blanket cylinder 8a, 8
By moving b, the upper and lower blanket cylinders 8a and 8b are engaged (pressed) with each other via the web 1, and at the same time, each blanket cylinder 8 is engaged (pressed) with the corresponding plate cylinder 5 (press plate 11). . With such a setting, all the printing cylinders are engaged with each other, and the web 1 travels synchronously by the sandwiching rotation of the blanket cylinder 8 to enable printing.

[0011]

In the rotary press, unless the web 1 is applied with a proper constant tension, the print quality is deteriorated. turn into.
The web tension drives the infeed device 25 of the web supply device unit 13, the printing cylinder (in particular, the blanket cylinder 8), the cooling roller 22 of the cooling device 15, the drag roller 23 of the web pass device 16, the nipping roller 24 of the folding machine 17, and the like. The amount of feeding of the web 1 by the rollers, that is, the difference in the surface speed of the rollers is determined between the respective devices. Such a speed difference is slight, and if the web 1 has a slack for some reason at the beginning, the slack can be removed only little by little.

Further, in the case of the tension of the web 1 between the printing apparatuses, there is a demand to insert the cylinder from the time when the speed is low and to stabilize the tension early. However,
On the other hand, the adjustment of printing ink is
Due to the response time until the state of the result of ink adjustment is output, the tone of the color at the printing speed cannot be obtained unless the speed is high to some extent.

In order to solve such a contradiction, the conventional rotary offset press is forced to insert the cylinder at a high speed,
We are starting to adjust the ink. Therefore, stabilization of the tension of the web 1 between the printing devices 2 starts from the time when the offset rotary press reaches a high speed to some extent.
There was a problem that the stabilization of tension was delayed, and a large amount of wasted paper was produced.

The present invention was devised in view of the above-mentioned problems, and while allowing the color tone at the printing speed to be obtained, the cylinder tension is applied from the time when the speed is low to stabilize the web tension early. An object of the present invention is to provide a cylinder attachment / detachment control method and a cylinder attachment / detachment device for an offset rotary press.

[0015]

Therefore, according to the method for controlling cylinder attachment / detachment of an offset rotary press of the present invention as defined in claim 1, when the printing cylinder is attached / detached in the printing device of the offset rotary press, the cylinder is removed from the cylinder removal state. When performing, the blanket cylinder is first pressed against the material to be printed, and then the plate cylinder is pressed against the blanket cylinder at a predetermined timing.

According to a second aspect of the present invention, there is provided an offset rotary press cylinder attachment / detachment control method according to the first aspect, wherein the watering roller and the inking roller are provided before the plate cylinder is pressed against the blanket cylinder. It is characterized in that the plate cylinder is pressed, and then the plate cylinder is pressed against the blanket cylinder while the watering roller and the inking roller are pressed against the plate cylinder at a predetermined timing.

According to a third aspect of the present invention, there is provided a method for controlling cylinder attachment / detachment of an offset rotary press according to the first or second aspect, wherein a plurality of the printing devices are provided and the blanket cylinder of the printing device for the final color is printed on the object. It is characterized in that the blanket cylinder of another printing device is pressed against the printing material at a predetermined timing after the pressing is performed on the printing material. A cylinder attaching / detaching device for an offset rotary press according to a fourth aspect of the present invention is a cylinder attaching / detaching device for attaching / detaching a printing cylinder in a printing device for an offset press, and a blanket cylinder moving mechanism for attaching / detaching a blanket cylinder. , And a control device for controlling the blanket cylinder moving mechanism, wherein the control device first sets the blanket cylinder to press the printing object when the cylinder is removed from the cylinder removal state, and then at a predetermined timing. The blanket cylinder moving mechanism is controlled so as to press the plate cylinder against the blanket cylinder.

According to a fifth aspect of the present invention, there is provided a cylinder mounting / demounting device for an offset rotary press, which is a cylinder mounting / demounting device for mounting / demounting a printing cylinder in a printing apparatus for an offset rotary press, comprising an inking roller and a watering roller. A roller attachment / detachment mechanism for attaching / detaching the plate cylinder, a plate cylinder moving mechanism for attaching / detaching the plate cylinder, a blanket cylinder moving mechanism for attaching / detaching the blanket cylinder, and a controller for controlling at least the blanket cylinder moving mechanism. The control device first sets the blanket cylinder to a state of pressing the material to be printed when the cylinder is inserted from the unrolled state, and then the blanket cylinder is pressed to the blanket cylinder at a predetermined timing. It is characterized by controlling the body movement mechanism.

According to a sixth aspect of the present invention, there is provided a cylinder mounting / demounting device for an offset rotary press according to the fifth aspect, wherein the control device is configured to press the plate cylinder against the blanket cylinder.
Pressing the watering roller and the inking roller against the plate cylinder, and then pressing the plate cylinder against the blanket cylinder while pressing the watering roller and the inking roller against the plate cylinder at a predetermined timing. It has a feature.

According to a sixth aspect of the present invention, there is provided a cylinder mounting / demounting device for an offset rotary press according to any one of the fourth to sixth aspects, wherein a plurality of the printing devices are provided and the control device is a final device. After the blanket cylinder of the color printing apparatus is pressed against the printing object, the blanket cylinder of another printing apparatus is pressed against the printing object at a predetermined timing.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1 to 3 show a cylinder attachment / detachment control method and a cylinder attachment / detachment device for an offset rotary press according to a first embodiment of the present invention. FIG. 1 is a time chart for explaining the cylinder attachment / detachment control method, and FIG. FIG. 3 is a schematic side view of a printing device showing the body attaching / detaching device, and FIG. 3 is a schematic side view of a main part of the printing device showing the procedure of the body attaching / detaching device.

First, the offset rotary press for double-sided printing according to the first embodiment of the present invention will be described. As shown in FIG. 2, the offset rotary press has a printing device (printing section) as shown in FIG. 2 is provided as one set or as a plurality of sets of printing device groups 2a to 2n arranged in parallel along the traveling direction of the web 1 as shown in FIG. In each printing device, roller attaching / detaching mechanisms 6a and 6b for attaching / detaching the inking roller 3 and the watering roller 4 to / from the plate cylinder 5 for attaching / detaching the printing cylinder, and a plate cylinder moving mechanism for attaching / detaching the plate cylinder 5 7, a blanket cylinder moving mechanism 9 for attaching and detaching the blanket cylinder 8, and a control device 10 for driving the mechanisms 6, 7, 9 in association with each other at a predetermined timing. Can be provided.

That is, the printing apparatus is provided with an upper blanket cylinder 8a and a lower blanket cylinder 8b which are based on the web pass line, and an upper plate cylinder 5a and a lower plate cylinder 5b as printing cylinders. In addition to this, an inking roller 3 and a watering roller 4 that engage with the plate cylinder 5 are provided, and each of them has a structure that can be detached (independently) individually.

In the present embodiment, the printing apparatus is a double-sided printing system having a blanket cylinder 8, a plate cylinder 5, an inking roller 3, a watering roller 4 and the like at the top and bottom.
The present apparatus and configuration can be applied to the printing section of a single-sided offset printing press as a structure (type) having the same function only in one of upper and lower sides. For example, although not shown, a fixed position impression cylinder is provided in place of the lower blanket cylinder 8b of the present embodiment based on the web pass line, and the upper blanket cylinder 8a, the upper plate cylinder 5a, and the inking. The roller 3 and the watering roller 4 may be individually detachable.

In the case of the cylinder attaching / detaching device according to the present embodiment, the functional characteristics thereof are as follows: on the upper and lower sides of the web pass line, between the plate cylinder 5 and the blanket cylinder 8 and the upper and lower blanket cylinders 8a, 8b. The upper and lower blanket cylinders 8 are separated by the web 1 from the separated (separated) state.
Only a and 8b can be engaged, which allows
A state in which the web 1 is nipped and conveyed can be set without transferring and supplying the ink 19 to the outer peripheral surface of the blanket cylinder 8.

More specifically, when changing the setting of the printing apparatus 2 and changing the setting of the printing apparatus 11 such as replacement of the printing plate 11 and restarting printing, the control apparatus 10 is operated as follows. ing. That is, FIG. 3 (a)
In the initial state shown in (1), between the blanket cylinder 8 and the plate cylinder 5, which are installed on the upper and lower sides of the web path line, between the plate cylinder 5 and the inking roller 3, and between the plate cylinder 5 and the watering roller 4, respectively. And between the upper and lower blanket cylinders 8a, 8b,
Each of them is in a body-removed state in which a predetermined gap is formed.

From this initial state, first, as shown in FIG. 3B, the blanket cylinder moving mechanism 9 is driven to bring only the blanket cylinders 8a and 8b on the upper and lower sides close to each other, and the web 1
Are engaged (pressed) with each other via. As a result, the web 1 runs synchronously due to the rotation of the blanket cylinders 8a, 8b in a pinching manner. Next, as shown in FIG. 3C, the water kneading roller 12 and the watering roller 4 are moved through the roller attaching / detaching mechanism 6a to move the watering roller 4 to the plate cylinder 5.
It is pressed against the printing plate 11 wound around. This allows
The dampening water 18 of the dampening water boat is sequentially transferred between the water kneading roller 12 and the watering roller 4 and supplied to the printing plate 11.

Next, as shown in FIG. 3D, the inking roller 3 is moved through the roller attaching / detaching mechanism 6b,
The inking roller 3 is pressed against the printing plate 11 wound around the plate cylinder 5. As a result, the ink 19 sequentially transferred from the ink fountain and supplied is transferred to the printing plate 11 via the ink forming roller 3.
Is supplied to. After that, the plate cylinder 5 is moved through the plate cylinder moving mechanism 7 while the watering roller 4 and the ink forming roller 3 are pressed and engaged with the cylinder 5, and the plate cylinder 5 (press plate 11) is blanketed. The body 8 is engaged (pressed) (not shown).

In the case of a rotary press having a plurality of printing devices arranged side by side, the blanket cylinder 8a of the final printing device 2n,
8b is pressed against the web (printing material) 1 to hold it, and then, at a predetermined timing, the blanket cylinder 8 of another printing apparatus is pressed.
Control is performed so that a and 8b are pressed against the web (printing material) 1. As a result, the web 1 travels in a state in which a predetermined tension is applied by the conveying force to the downstream side and the braking force (back tension) on the web supply device 13 side, and all the printing cylinders engage with each other to print. It will be in a state where you can.

Since the first embodiment of the present invention is configured as described above, at the start of printing, the operation is performed as shown in FIGS. 1 and 3. That is, from the initial state (with the cylinder removed) in which predetermined gaps are formed between the cylinders and between the cylinder and the roller as shown in FIG.
_{At 02} , as shown in FIG. 3 (b), only the blanket cylinders 8a, 8b on the upper and lower sides are brought close to each other, and the blanket cylinders 8a, 8b are engaged (pressed) with each other via the web 1. Run synchronously.

Next, at time t ₁ , as shown in FIG. 3C, the printing plate 11 in which the watering roller 4 is wound around the plate cylinder 5 is used.
The dampening water 18 from the dampening water boat to the kneading roller 12
And the watering roller 4 are sequentially transferred and supplied to the printing plate 11. Next, at a time t ₂ , as shown in FIG. 3D, the inking roller 3 is pressed against the printing plate 11 wound around the plate cylinder 5, and the ink 19 sequentially transferred from the ink fountain is supplied. It is supplied to the printing plate 11 through the ink form roller 3.

At time t ₃ thereafter, the plate cylinder 5 is pressed with the watering roller 4 and the inking roller 3 being pressed against the cylinder 5.
Is moved to engage (press) the plate cylinder 5 (press plate 11) with the blanket cylinder 8. By doing so, only the blanket cylinders 8a and 8b can be engaged in the low speed range, and the running speed of the web 1 can be increased in a blank state to stabilize the tension of the web 1 early. Will be possible.

Moreover, printing can be started in the high speed range. For this reason, it is possible to reduce the amount of wasted paper that occurs in the readjustment of the color and the registration error due to the speed difference. In the plurality of printing devices 2 (see FIG. 9), when only the blanket cylinders 8a and 8b are engaged to stabilize the tension of the web 1 early, first, the blanket cylinders 8a and 8b of the final printing device 2n are It is also possible to engage (at time t ₀₁ in FIG. 1) and then (at time t ₀₂ in FIG. 1) to engage the blanket cylinders 8 a and 8 b of the other printing device 2. In this way, the web tension between the infeed device 25 and the final printing device 2n is first stabilized, and then the blanket cylinders 8a, 8a,
8b is engaged, which has the effect of easily stabilizing the web tension between the printing devices uniformly.

Next, a second embodiment of the present invention will be described. 4 and 5 show a cylinder attachment / detachment control method and cylinder attachment / detachment device for an offset rotary press according to a second embodiment of the present invention, and FIG. 4 is a schematic side view of a printing device showing the cylinder attachment / detachment device, FIG. 5 is a schematic side view of the main part of the printing apparatus, showing the procedure for mounting and demounting the cylinder.

As shown in FIG. 4, the cylinder attaching / detaching device of the offset rotary press according to the present embodiment has the same structure as that of the prior art except for a part of the function of the control device 10B. That is, in the offset rotary press according to the present embodiment, one set of printing devices (printing units) 2 as shown in FIG.
Alternatively, as shown in FIG. 9, it is provided as a plurality of sets of printing device groups 2a to 2n arranged in parallel along the traveling direction of the web 1.

In each printing apparatus, roller attaching / detaching mechanisms 6a and 6b for attaching / detaching the inking roller 3 and the watering roller 4 to / from the plate cylinder 5 for attaching / detaching the printing cylinder, and a plate for attaching / detaching the plate cylinder 5 are used. The cylinder moving mechanism 7, the blanket cylinder moving mechanism 9 for attaching / detaching the blanket cylinder 8 and the control device 10 for driving the mechanisms 6, 7, 9 in association with each other at a predetermined timing are used as main components. A detachable device can be provided.

In the printing apparatus, as the printing cylinders, an upper blanket cylinder 8a and a lower blanket cylinder 8b based on the web pass line, an upper plate cylinder 5a and a lower plate cylinder 5 are used.
b, and in addition to this, an inking roller 3 and a watering roller 4 that engage with the plate cylinder 5 are provided, each of which has a structure that can be individually (independently) detached.

By the way, in the present embodiment, as shown in FIG. 5, the upper plate cylinder 5a and the lower plate cylinder 5b are fixed at predetermined positions, and the upper blanket cylinder 8a and the lower blanket cylinder 8a based on the web pass line are fixed. The side blanket cylinders 8b and 8b are respectively supported by the blanket cylinder moving mechanism 21,
That is, as shown in FIG. 5 (a), the corresponding blanket cylinder 8 and plate cylinder 5 do not engage with any adjacent cylinders, and as shown in FIG. Of the blanket cylinders 8a and 8b are engaged with each other, and as shown in FIG. 5C, the blanket cylinders 8a and 8b are engaged with both the corresponding blanket cylinder 8 and the plate cylinder 5, and It is configured to be fixable.

As the blanket cylinder moving mechanism 21, two sets of eccentric bearings are coaxially incorporated, or two kinds of moving mechanisms are combined to drive the first-step moving mechanism and the second-step moving mechanism individually in two steps. A variety of formats such as the use can be adopted (not shown). It should be noted that this embodiment can also be applied to the printing section of the offset printing press for single-sided printing, as a structure having the same function as that of the first embodiment described above.

For example, an impression cylinder is provided on the lower side with respect to the web pass line, and a position where the upper blanket cylinder 8a does not engage with either the impression cylinder or the plate cylinder 5a, or a position where it engages only with the impression cylinder. , And a structure capable of moving and fixing to a position that engages with both the impression cylinder and the upper plate cylinder 5a which is fixedly installed (not shown). In the present embodiment, only the upper and lower blanket cylinders 8a and 8b are engaged (pressed) via the web 1 from the state where the plate cylinder 5 and the blanket cylinder 8 are separated on the upper and lower sides of the web pass line. It is possible to set a state in which the web 1 is nipped and conveyed without transferring and supplying ink to the outer peripheral surface of the blanket cylinder 8.

After changing the settings of the printing apparatus 2 such as the replacement of the printing plate 11 of the control device 10B and the like, when the printing is resumed, the insertion of the cylinder is performed through the control device 10B in the same manner as in the first embodiment. (Control) is performed. Since the second embodiment of the present invention is configured as described above, when starting printing, the first embodiment
Similar to the embodiment, the operation is performed as shown in FIGS.

That is, as in the first embodiment, FIG.
As shown in FIG. 1, from an initial state in which a predetermined gap is formed between the cylinders or between the cylinder and the roller (a cylinder removed state).
The at t ₀₂ shown, blanket cylinder 8a of the upper and lower sides as shown in FIG. 3 (b), to approximate 8b only, via the web 1 is engaged (pressed) together, the blanket cylinder 8a,
The web 1 is synchronously driven by the nip rotation of 8b.

Next, at a time point t ₁ , as shown in FIG. 3C, the printing plate 11 in which the watering roller 4 is wound around the plate cylinder 5 is used.
The dampening water 18 from the dampening water boat to the kneading roller 12
And the watering roller 4 are sequentially transferred and supplied to the printing plate 11. Next, at a time t ₂ , as shown in FIG. 3D, the inking roller 3 is pressed against the printing plate 11 wound around the plate cylinder 5, and the ink 19 sequentially transferred from the ink fountain is supplied. It is supplied to the printing plate 11 through the ink form roller 3.

At a time t ₃ thereafter, the plate cylinder 5 is pressed while the watering roller 4 and the inking roller 3 are pressed and engaged with the cylinder 5.
Is moved to engage (press) the plate cylinder 5 (press plate 11) with the blanket cylinder 8. By doing this, the first
Similar to the embodiment, the blanket cylinders 8a and 8b are used in the low speed range.
It is possible to engage only one of them, and by increasing the traveling speed of the web 1 in a blank state, it becomes possible to stabilize the tension of the web 1 at an early stage, and furthermore, to start printing in the high speed range. You can For this reason, it is possible to reduce the amount of wasted paper that occurs in the readjustment of the color and the registration error due to the speed difference.

In the second embodiment as well, in the case of a rotary press in which a plurality of sets of printing apparatuses are arranged side by side, time t _{01 in} FIG.
After pressing the blanket cylinders 8a and 8b of the final printing device 2n against the web (printing material) 1 to hold them, the time t of FIG.
_{At 02} , the blanket cylinders 8a and 8b of another printing apparatus are pressed against the web (printing material) 1 at a predetermined timing to control the blanket cylinders 8a and 8b. This has the effect of easily stabilizing the web tension between the printing devices uniformly.

In the case of this embodiment, since the plate cylinder 5 is structurally fixedly installed, in addition to the effect of the first embodiment, the moving mechanism 7 of the plate cylinder 5 is not necessary (simple), and the engagement is performed. There are advantages that the positional relationship adjustment control becomes easy and the manufacturing cost can be reduced. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made to the embodiments without departing from the spirit of the present invention.

[0047]

As described above in detail, according to the method for controlling the cylinder attachment / detachment of the offset rotary press of the present invention described in claim 1 or the cylinder attachment / detachment device of the offset rotary press of the present invention described in claims 4 and 5, Only the blanket cylinder can be engaged in the low speed range, and by increasing the running speed of the web in a blank state, it becomes possible to stabilize the tension of the web at an early stage. Since it can be started, it is possible to reduce the loss of paper that occurs in the readjustment of the color, the registration shift, and the like due to the speed difference.

According to the cylinder mounting / demounting control method for an offset rotary press of the present invention as defined in claim 2 or the cylinder mounting / demounting device for an offset rotary press as claimed in claim 6, printing can be started in a high speed range. It is possible to reduce the amount of wasted paper that occurs during readjustment of color, registration error, etc. due to the speed difference. According to the method for controlling the cylinder attachment / detachment of the offset rotary press of the present invention described in claim 3 or the cylinder attachment / detachment device of the offset rotary press of the present invention described in claim 7, it is easy to uniformly stabilize the web tension between the respective printing devices. effective.

[Brief description of drawings]

FIG. 1 is a time chart illustrating a body attachment / detachment control method according to a first embodiment of the present invention.

FIG. 2 is a schematic side view of the printing apparatus showing the cylinder attaching / detaching device according to the first embodiment of the present invention.

FIG. 3 is a schematic side view of a main part of the printing apparatus according to the first embodiment of the present invention, illustrating a procedure for attaching and detaching a cylinder (a) to (d).
It is a figure shown in order of.

FIG. 4 is a schematic side view of a printing device showing a cylinder attaching / detaching device according to a second embodiment of the present invention.

FIG. 5 is a schematic side view of a main part of the printing apparatus according to the first embodiment of the present invention, in which states (a) to (c) of the respective printing cylinders when the cylinder is attached and detached are shown. It is a figure shown by.

FIG. 6 is a schematic side view for explaining a conventional cylinder attaching / detaching device in a printing device installed in an offset rotary press.

FIG. 7 is an explanatory diagram showing a body attachment / detachment control method in a conventional body attachment / detachment device.

FIG. 8 is a schematic side view showing one of printing apparatuses of a conventional offset rotary press.

FIG. 9 is a schematic diagram showing an overall schematic configuration of a conventional offset rotary press.

[Explanation of symbols]

1 Web 2 printing devices 3 Inking roller 4 Watering roller 5 plate body 6 Roller attachment / detachment mechanism 7 Plate cylinder moving mechanism 8 blanket body 9 Blanket cylinder movement mechanism 10A to 10C control device 11 printing plates 12 Water-mixing roller 13 Web supply device 14 Drying equipment 15 Cooling device 16 Web Pass Device 17 folding machine 18 dampening water 19 ink 20 Blanket cylinder movement mechanism 21 Blanket cylinder movement mechanism 22 Cooling roller 23 Drag roller 24 Nipping roller 25 Infeed device

Claims (7)

(57) [Claims] 1. When attaching and detaching a printing cylinder to and from a printing apparatus of an offset rotary press, when the blanket cylinder is inserted from the cylinder removal state, first, the blanket cylinder presses an object to be printed, and then the plate cylinder at a predetermined timing. A method for controlling a cylinder attachment / detachment of an offset rotary press, characterized in that the blanket cylinder is pressed. 2. A watering roller and an inking roller are pressed against the plate cylinder before the plate cylinder is pressed against the blanket cylinder, and the watering roller and the inking roller are then pressed at a predetermined timing. 2. The plate cylinder is pressed against the blanket cylinder while being pressed against the plate cylinder.
A cylinder attachment / detachment control method for an offset rotary press. 3. A plurality of the printing devices are provided, wherein the blanket cylinder of the printing device of the final color is pressed against the printing object, and then the blanket cylinders of other printing devices are pressed against the printing object at a predetermined timing. The cylinder attachment / detachment control method for an offset rotary press according to claim 1 or 2. 4. A cylinder attaching / detaching device for attaching / detaching a printing cylinder in a printing device of an offset rotary press, comprising: a blanket cylinder moving mechanism for attaching / detaching a blanket cylinder; and a control device for controlling the blanket cylinder moving mechanism. The control device sets the blanket cylinder to press the material to be printed when the cylinder is inserted from the unrolled state, and then presses the plate cylinder to the blanket cylinder at a predetermined timing. A cylinder attaching / detaching device for an offset rotary press, comprising controlling the blanket cylinder moving mechanism. 5. A cylinder attaching / detaching device for attaching / detaching a printing cylinder in a printing device of an offset rotary press, comprising: a roller attaching / detaching mechanism for attaching / detaching an inking roller and a watering roller to / from a plate cylinder; The plate cylinder moving mechanism, the blanket cylinder moving mechanism for attaching / detaching the blanket cylinder, and the control device for controlling at least the blanket cylinder moving mechanism. First, the blanket cylinder is brought into a state of pressing the material to be printed, and thereafter, the blanket cylinder moving mechanism is controlled so as to press the plate cylinder to the blanket cylinder at a predetermined timing. Body removal device. 6. The control device presses a watering roller and an inking roller on the plate cylinder before pressing the plate cylinder on the blanket cylinder, and then at a predetermined timing, the watering roller and the roller. The cylinder attaching / detaching device for an offset rotary press according to claim 5, wherein the plate cylinder is pressed against the blanket cylinder while the inking roller is pressed against the plate cylinder. 7. A plurality of the printing devices are provided, and the control device presses the blanket cylinder of the printing device of the final color against the printing object, and then the blanket cylinders of other printing devices are applied to the printing object at a predetermined timing. The cylinder attachment / detachment device for an offset rotary press according to any one of claims 4 to 6, wherein the cylinder attachment / detachment device is pressed.