JP2002283539A - Printing plate replacement device and printing plate replacement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the maintenance and management services extended to a printing machine, under a simple construction and also upgrade the positioning accuracy of a printing plate, with regard to a printing plate replacement device for fitting a new printing plate to a plate cylinder of a rotary press. SOLUTION: The printing plate replacement device comprises a retention means 3 for retaining a new printing plate 2, a positioning means 4 for regulating a retaining position for the new printing plate 2 by means of the retention means 3 and a conveyance means for conveying the new printing plate 2 together with the retention means 3 and the positioning means 4. In addition, the conveyance means conveys the new printing plate 2 to a spot near the plate cylinder 5 after the position of the new printing plate 2 and then transfers the new printing plate 2 in a tangential direction of the plate cylinder 5. Thus the new printing plate 2 is pressurized by bringing the chucking side of the new printing plate 2 into contact with the plate cylinder 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate changing device and a plate changing method for automatically installing a new plate when changing a plate of a rotary printing press.

[0002]

2. Description of the Related Art Generally, a printing unit of a rotary printing press is provided with a plate cylinder for mounting a printing plate (or simply referred to as a printing plate) on which a pattern to be printed is printed. Then, ink is supplied to the plate cylinder to attach the ink to the pattern portion of the plate, and the pattern is transferred to the blanket cylinder with the ink.
Further, the picture is transferred to a web for printing.
When printing is completed, the plate (old plate) mounted on the plate cylinder is removed, and a new printing plate (new plate) for the next printing is mounted on the plate cylinder.

Conventionally, the work of removing and mounting the plate at this time has been performed manually, but in recent years, devices have been proposed and developed which are automatically mounted and removed by a machine.
For example, JP-A-7-290688 and JP-A-7-2
Japanese Patent No. 90689 discloses a technique relating to a plate changing device for mounting a new plate on a plate cylinder. In each of these techniques, the position at the time of mounting a new plate is regulated by a positioning stopper provided at the tip of the plate. Then, after the new plate is sucked and held by the holding member and the positioning stopper is opened, the holding member is turned to press the new plate on the plate cylinder cylindrical surface, and to apply a pressurization by the elastic force of the new plate.

[0004] Thereafter, the plate cylinder is rotated, and when the gap formed in the plate cylinder coincides with the tip (holding side) of the new plate, the gripping side is inserted into the gap due to the elasticity of the plate. Engage. Also,
Japanese Patent Publication No. 265505 also discloses a printing plate attaching / detaching device for attaching / detaching a printing plate to / from a plate cylinder. With this technology,
When the new plate is mounted, the plate cylinder is stopped in advance at a predetermined rotation phase, and then the new plate is sent out toward the plate cylinder along a surface in contact with the peripheral surface of the plate cylinder. The predetermined rotation phase of the plate cylinder is a rotation phase such that the engagement portion of the plate cylinder coincides with the grip side of the new plate when the new plate is sent out, and the plate cylinder is stopped in such a state. In this way, when the new plate is sent out, the grip side of the new plate is engaged with the engaging portion of the plate cylinder.

[0005]

However, among the conventional techniques described above, the techniques disclosed in JP-A-7-290688 and JP-A-7-290689 have the following problems. Since the pressurizing is applied to the new plate by rotating the holding member and the new plate itself, it is necessary to arrange various mechanisms around the plate cylinder, and the maintenance property is not good. The plate is conveyed from a position distant from the plate cylinder, but after the plate is moved to a position near the plate cylinder, the plate is delivered to the holding member, which complicates the apparatus and reduces the positioning accuracy. For this reason, the grip side of the plate may not be correctly engaged with the gap. Since the holding member is disposed in the vicinity of the plate cylinder, ink mist, paper dust, and the like adhere to the plate, causing a failure in suction. Further, in order to avoid such a situation, maintenance such as cleaning is frequently required, and maintenance management becomes complicated.

Further, in the technique disclosed in Japanese Patent Publication No. 265505, it is necessary to stop the plate cylinder at a predetermined rotation phase, and there is a problem that control contents are complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and facilitates maintenance and management of a printing press with a simple configuration, improves plate positioning accuracy, and sets a plate cylinder to a specific rotational phase. It is an object of the present invention to provide a plate exchanging apparatus and a plate exchanging method capable of starting a work for mounting a new version without stopping the operation.

[0007]

According to the present invention, there is provided a plate changing apparatus for mounting a new plate on a plate cylinder of a rotary printing press. Means, positioning means for regulating the holding position of the new plate by the holding means, and conveying means for conveying the new plate together with the holding means and the positioning means, the conveying means,
After positioning the new plate, the new plate is conveyed to the vicinity of the plate cylinder, and thereafter, the new plate is moved along the tangential direction of the plate cylinder, and the grip side of the new plate is brought into contact with the plate cylinder to thereby form the new plate. , And is configured to apply a pressure.

According to a second aspect of the present invention, there is provided a plate exchanging apparatus for mounting a new plate on a plate cylinder of a rotary printing press, comprising: holding means for holding the new plate; Positioning means for regulating the holding position of the new plate, and conveying means for conveying the new plate together with the holding means and the positioning means, the conveying means conveying the new plate to the vicinity of the plate cylinder after positioning the new plate. Then, the new plate is moved above the plate cylinder, and then the new plate is lowered toward the plate cylinder to apply a pressure to the new plate.

According to a third aspect of the present invention, there is provided a plate exchanging apparatus according to the first or second aspect, wherein the holding means and the positioning means are provided on a common member. Features. According to a fourth aspect of the present invention, in the plate exchange device according to any one of the first to third aspects, the positioning means can engage with a positioning hole formed in the new plate. It is characterized by comprising a positioning pin.

According to a fifth aspect of the present invention, there is provided a plate exchanging apparatus according to any one of the first to fourth aspects, wherein the positioning means has at least two positioning pins. It is characterized by being constituted. According to a sixth aspect of the present invention, there is provided the plate changing device according to any one of the first to fifth aspects, wherein the new plate is positioned at a standby position away from the main body of the rotary printing press. And is configured to be held by the holding means.

A plate exchange method according to a seventh aspect of the present invention is a plate exchange method for mounting a new plate on a plate cylinder of a rotary printing press, wherein the new plate is held and positioned after the new plate is positioned. A first step of transporting the plate to the vicinity of the plate cylinder, a second step of moving the new plate along a tangential direction of the plate cylinder, and contacting the gripping side of the new plate with the plate cylinder to contact the plate. And a third step of applying pressurization.

According to another aspect of the present invention, there is provided a plate replacing method for mounting a new plate on a plate cylinder of a rotary printing press, wherein the new plate is held and positioned after the new plate is positioned. A first step of transporting the plate to the vicinity of the plate cylinder, a second step of moving the grip side of the new plate toward the peripheral surface of the plate cylinder, and bringing the grip side of the new plate into contact with the peripheral surface of the plate cylinder. And applying a pressure to the new edition.

According to a ninth aspect of the present invention, in the plate exchange method according to the seventh or eighth aspect, the new plate is positioned and held at a standby position away from the main body of the rotary printing press. It is characterized by that.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 illustrates a plate exchange device according to an embodiment.
3 is a schematic diagram showing the configuration of the main part, FIG. 2 is a diagram for simply explaining the operation, FIGS. 3A to 3F are diagrams for explaining the operation in detail, and FIG. It is a typical sectional view of a printing machine to which a plate exchange device is applied.

The plate changing device according to the present embodiment is a device for automatically changing a printing plate (old plate) wound around a plate cylinder to a new printing plate (new plate). The old plate is removed from the plate cylinder. It has an old version removal device and a new version attachment device for attaching a new version. Here, the plate exchanging device according to the present embodiment is characterized by a new plate attaching device, and various types of old plate removing devices including known ones can be applied. For this reason, the illustration and the description of the old-version removing device are omitted.

As shown in FIG. 4, the printing press to which the present invention is applied is configured substantially symmetrically with the web 10 interposed therebetween.
1, an upper plate cylinder 5 and an upper plate exchange device (not shown) are provided, and a lower blanket cylinder 1
1, a lower plate cylinder 5 and a lower plate exchange device (not shown) are provided. Hereinafter, the present embodiment will be described focusing on the lower plate changing device, but the upper plate changing device is similarly configured.

In FIG. 1, reference numeral 1 denotes a new plate holding unit which is a main part of the new plate attaching device. The new plate holding unit 1 regulates the positions of the suction pad (holding means) 3 for holding the new plate 2 and the position of the new plate 2. A positioning pin (pin register) 4 is provided. The suction pad 3 suctions and holds the new plate 2 by a negative pressure (vacuum pressure) introduced from outside.
When the negative pressure is released, the holding of the new version 2 is released. The positioning pins 4 regulate the position of the new plate 2 by being inserted into positioning holes formed in the new plate 2, and function as positioning means.

The suction pad 3 and the positioning pin 4 are both fixed to a common member (new plate holding table) 6, and the new plate holding table 6 can be moved by a transfer device (conveying means) (not shown). It is configured. Also, one pin 4 is provided on each side of the new edition 2. The conveying device moves the new plate holding table 6 from a standby position (a position away from the plate cylinder 5) outside the frame of the printing press to a plate mounting work start position a (a position near the plate cylinder 5) as shown in FIG. And a second conveying device for conveying the new plate holding table 6 from the work start position a to the pressurizing position b where the gripping side 2a of the new plate 2 comes into contact with the plate cylinder 5 and pressurizes. It is configured with a transport device.

Here, as the first transporting device, a driving force transmitting mechanism such as a ball screw mechanism or a chain mechanism provided between the frame of the printing press and the new version holding section 1 to transport the entire new version holding section 1 is used. Is applicable. Also, the second
An air cylinder, a hydraulic cylinder, or the like attached between a fixing portion (not shown) of the new plate holding section 1 and the new plate holding table 6 can be applied as the transfer device. Of course, these first and second transporting devices are not limited to those described above, and other configurations may be used as long as the new plate holding table 6 is moved to the work start position a and the pressurized position b, respectively. Alternatively, the first and second transfer devices may be configured by one actuator.

As shown in FIG. 2, the new plate holding unit 1 is also provided with a plate pressing roller 7. The plate holding roller 7 is disposed above the holding side 2a of the new plate 2, and is attached to the new plate holding table 6 via an actuator (not shown) or the like. The plate holding roller 7 is mounted so as to be movable in the vertical direction (that is, in the direction orthogonal to the direction in which the new plate 2 is disposed) by the above-described actuator. The configuration of the plate pressing roller 7 itself is known, and a detailed description thereof will be omitted.

In the plate changing device according to the first embodiment, when the new plate 2 is mounted, the new plate 2 is moved from the work start position a to the pressurized position b along the tangential direction of the plate cylinder 5 by the transfer device. It is designed to be transported to the forward side. In addition, at the pressurized position b, as shown in FIG. 2, the gripping side 2a of the new plate 2 is set so as to contact the plate cylinder 5, and the gripping side 2a is elastically deformed.

Then, the plate cylinder 5 is rotated counterclockwise in the figure, and when the position of the gap 8 of the plate cylinder 5 matches the position of the gripping side 2a, the gripping side 2a is brought into the gap 8 by the elastic force of the new plate 2. At the same time, the plate pressing roller 7 is driven by an actuator, and the new plate 2 is pressed against the plate cylinder 5 with an appropriate pressure by the plate pressing roller 7.

When the plate cylinder 5 is further rotated, the gripping side 2a and the fitting end 8a of the gap 8 are engaged, and the new plate 2 is wound around the plate cylinder 5. . Since the plate exchange device according to the first embodiment of the present invention is configured as described above, the operation of attaching the new plate 2 by the new plate attachment device will be described below. First, during operation of the printing press, the new plate 2 is already held outside the frame of the printing press in a state of being held in the new plate holding unit 1 in advance. At this time, the positioning pin 4 is inserted into the positioning hole of the new plate 2 to thereby obtain the new plate 2.
Is fixed to the new plate holding portion 1. Also, substantially at the same time as the above positioning, a negative pressure acts on the suction pad 3 to hold the new plate 2.

Next, the new plate holder 1 is transported to a work start position a shown in FIG. 2 by a first transport device (not shown) (first step). Then, from this state, the new plate 2 is held by the suction pad 3 and the positioning pin 4 along the tangential direction of the plate cylinder 5 by a second transfer device (not shown) as shown in FIG. Sent out (second
Steps). At this time, the plate cylinder 5 is rotated in the same direction (counterclockwise in the drawing) as the direction in which the new plate 2 is sent out.

Then, the gripping side 2a of the new plate 2 is brought closer to the plate cylinder 5, and the positioning pins 4 are drawn into the new plate holding table 6 to release the positioning of the new plate 2 by the positioning pins 4. By moving the gripping side 2a forward and making contact with the plate cylinder 5, as shown in FIG. 3B, the new plate 2 is brought into a pressurized position on the surface of the plate cylinder 5, and held by the elastic force of the new plate 2. Pressurization acts on side 2a (third step).

Thereafter, as shown in FIG.
Is rotated and the gap 8 reaches the position of the gripping side 2a, the elasticity of the new plate 2 causes the gripping side 2a to enter the gap 8, and the gripping side 2 engages with the gap 8. At about the same time, the plate holding roller 7 descends, and the new plate 2 is pressed against the surface of the plate cylinder 5. At this time, when the plate pressing roller 7 presses the edge 8b on the edge of the gap 8,
The ink adhering to the plate holding roller 7 adheres to the plate cylinder 5, and the holding edge 2b of the new plate 2 is adhered to the plate cylinder 5 and becomes difficult to peel off. It is pressed in the vicinity of the fitting-side end 8a. The negative pressure of the suction pad 3 is released simultaneously with the pressing of the new plate 2 by the plate holding roller 7.

When the plate cylinder 5 is further rotated, FIG.
As shown in (d), the new plate 2 is wound around the plate cylinder 5 while being pressed against the plate holding roller 7. Thereafter, when the gap 8 rotates again to the position of the plate holding roller 7, the holding edge 2b of the new plate 2 is pushed into the gap 8 by the plate holding roller 7, as shown in FIG.

Further, as shown in FIG. 3F, the new plate 2 is attached to the plate cylinder 5 by fixing the butt side 2b by a clamp 9 provided in the gap 8. Then, the plate pressing roller 7 is separated from the plate cylinder 5 and the pressing of the plate pressing roller 7 is released. In addition,
3A to 3D, the clamp 9 is omitted. In addition, in the above-mentioned new plate mounting operation, the plate cylinder 5 is continuously rotating. 8, when it is engaged,
In the state shown in FIGS. 3C and 3E, the plate cylinder 5
May be rotated at a low speed or stopped.

As described above, according to the plate exchanging apparatus according to the first embodiment of the present invention, when the new plate 2 is attached, the new plate 2 is previously positioned at a standby position away from the plate cylinder 5,
Since the sheet is conveyed to the vicinity of the plate cylinder 5 in this positioned state, the new plate 2 can be attached to the plate cylinder 5 with high accuracy. In particular, by arranging the suction pad 3 and the positioning pin 4 on a common member (new plate holding table) 6, the positioning accuracy of the new plate 2 is further improved. On the other hand, conventionally, since the new plate is transported from the supply position of the new plate and transferred to the new plate holding unit near the plate cylinder, the positioning accuracy is reduced.

Further, since the positioning means is constituted by the positioning pins 4 which can be engaged with the positioning holes formed in the new plate 2, the positioning can be performed with a simple structure. Also, one pin 4 on each side of the new version 2
By performing the individual engagement, the new plate 2 can be held perpendicular to the plate cylinder 5. Also, the new version holding unit 1 and the new version 2
Since a mechanism that applies a turning force to itself and pressurizes the new edition 2 is not required, the apparatus itself can be simplified, and the cost can be reduced. In addition, the above-described turning mechanism is conventionally installed near the plate cylinder 5, but by eliminating these mechanisms, maintenance and inspection around the plate cylinder 5 becomes easy, and the maintainability is greatly improved.

Furthermore, since it is not necessary to provide the new plate holding unit 1 in the vicinity of the plate cylinder 5, it is possible to reduce the adhesion of ink mist and paper dust to the new plate 2, and to cause a plate change failure due to a suction failure of the suction pad 3. Can be prevented. In addition, various advantages can be obtained, such as the number of times of maintenance itself can be reduced. Further, the new plate 2 is caused to ride on the plate cylinder 5 to apply a pressurizing force. When the gap of the plate cylinder 5 coincides with the grip side 2a, the gap 8 and the grip side 2a are engaged by the elasticity of the new plate 2, so that the new plate 2 is engaged. It is not necessary to stop the plate cylinder 5 at a predetermined phase in advance at the time of starting the mounting operation, thereby providing an advantage that control can be simplified.

Next, a plate changing apparatus according to a second embodiment of the present invention will be described. FIG. 5 is a diagram for explaining the operation. Here, in the second embodiment, only a transport unit (not shown) is configured differently from the first embodiment. In the following, the description of the parts configured in the same manner as in the first embodiment will be omitted. Further, the plate changing device according to the second embodiment of the present invention is provided on both the upper and lower sides of the web similarly to the first embodiment, and the following description focuses on the plate changing device provided on the lower side of the web. As will be described, it goes without saying that the present invention is applicable as a plate changing device provided on the upper side of the web.

In the second embodiment, the new plate holder 1 is moved from the work start position a shown in FIG. 5 to a position above the plate cylinder 5 by the second transfer device described in the first embodiment. (Indicated by a 'in the figure), and thereafter from the upper position a' to the pressurized position b. That is, in the first embodiment, the new plate holding unit 1 is moved from the work start position a to the pressurized position b in one operation (see FIG. 2), whereas in the second embodiment, this operation is performed by 2 operations. It is composed of stages.

This is to increase the degree of freedom in arranging the components around the plate cylinder 5. In this way, the operation from the work start position a to the pressurizing position b is divided into two operations, thereby 5 makes it easier to lay out other parts and components around the new version 5 while avoiding interference with these parts.
Can be attached to the plate cylinder 5. Second embodiment of the present invention
Since the plate exchange device according to the embodiment is configured as described above, the operation of attaching the new plate 2 by the new plate attachment device will be described below.

First, as in the first embodiment, during the operation of the printing press, the new plate 2 is already set outside the frame of the printing press.
Are waiting in a state of being held in the new version holding unit 1. Then, by inserting the positioning pins 4 into the positioning holes of the new plate 2 at this time, the attachment position of the new plate 2 to the new plate holding portion 1 is regulated. Also, substantially at the same time as the above positioning, a negative pressure acts on the suction pad 3 to hold the new plate 2.

Next, the new plate holder 1 is transported to a work start position a shown in FIG. 5 by a first transport device (not shown) (first step). Here, the work start position a is
As shown in FIG. 5, the position is such that the new plate 2 does not come into contact with the plate cylinder 5 even if the new plate 2 is advanced as it is. Then, by one actuator of the second transfer device also not shown,
The new plate 2 is sent out along the tangential direction of the plate cylinder 5 while being held by the suction pads 3 and the positioning pins 4 (second step). Thereby, as shown in FIG. 5, the new plate 2 moves above the plate cylinder 5.

Next, the new plate 2 is lowered toward the plate cylinder 5 by the other actuator of the second transfer device, and
Is brought into contact with the plate cylinder 5 (third step). In the second embodiment, the new plate 2 is lowered along the radial direction of the plate cylinder 5. The holding side 2a of the new plate 2 is the plate cylinder 5
After the new plate 2 is further lowered by a predetermined amount even after the contact with the
(3rd step). In addition, at this time, the restriction of the position by the positioning pin 4 is released by the new plate 2 being warped upward.

At the same time, the plate cylinder 5 is rotated in the same direction (counterclockwise in the drawing) as the direction in which the new plate 2 is sent out, so that the gripping side 2a is engaged with the gap 8 of the plate cylinder 5. After that, in the first embodiment, FIGS.
Since the operation is the same as that described using (f), the description is omitted. Therefore, in the plate exchange device according to the second embodiment, the same advantages and effects as those of the first embodiment can be obtained, and in addition to the design of components (not shown) disposed around the plate cylinder 5. There is a specific advantage that the degree of freedom of the layout can be increased. In addition, it is possible to avoid interference between the components and the like arranged around the plate cylinder 5 and the new plate 2, and even if such components and the like are present around the plate cylinder 5, the new plate 2 is reliably transferred to the plate cylinder 5. It has the advantage that it can be attached to

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the second embodiment, it is sufficient that the pressurization can be applied to the new plate 2 in two steps from the work start position a in order to avoid interference with at least parts around the plate cylinder 5. The new plate 2 may be moved linearly to the upper position a 'of the body 5, or the new plate 2 may be moved in a curved path. Similarly, the movement locus from the upper position a 'of the plate cylinder 5 to the pressurized position b is not limited at all as described above. Further, as the holding means and the positioning means, those other than the suction pad 3 and the positioning pin 4 described above may be applied.

[0040]

As described above in detail, according to the plate changing apparatus of the first aspect of the present invention, the conveying means conveys the new plate to the vicinity of the plate cylinder after positioning the new plate, and thereafter tangentially contacts the plate cylinder. By moving the new plate along the direction and applying a pressure to the new plate by bringing the gripping side of the new plate into contact with the plate cylinder, the plate can be provided without a mechanism for rotating the new plate, which has been required conventionally. By using the elasticity of the plate, a pressurization can be applied to the grip side of the plate. Thus, the configuration of the plate changing device can be simplified, and the cost can be reduced. In addition, the mechanism for rotating the plate has been conventionally installed near the plate cylinder, but by eliminating the need for these mechanisms, maintenance and inspection around the plate cylinder becomes easy, and the maintainability is greatly improved. There is an advantage. In addition, by transporting the new version while positioning it,
There is an advantage that the accuracy of attaching the new version to the plate cylinder is greatly improved. In addition, since the new plate is pressed against the plate cylinder to apply pressure, when the plate cylinder rotates and the gap formed in the plate cylinder coincides with the gripping side, the gripping side engages the plate cylinder due to the elasticity of the new plate. I do. For this reason, it is not necessary to stop the plate cylinder at a predetermined phase in advance at the time of starting the work for mounting the new plate, and this has a unique advantage that the control can be simplified.

According to the plate changing device of the present invention, the conveying means conveys the new plate to the vicinity of the plate cylinder after positioning the new plate, and thereafter moves the new plate above the plate cylinder. By using a configuration in which the new plate is lowered toward the plate cylinder to apply pressure to the new plate, the elasticity of the plate can be used without providing a mechanism for rotating the new plate, which has been required conventionally, as in the above-described claim 1. And pressurize the grip side of the plate. Thus, the configuration of the plate changing device can be simplified, and the cost can be reduced. In addition, the mechanism for rotating the plate has been conventionally installed near the plate cylinder, but by eliminating the need for these mechanisms, maintenance and inspection around the plate cylinder becomes easy, and the maintainability is greatly improved. There is an advantage. In addition, since the new plate is pressed against the plate cylinder to apply pressure, when the plate cylinder rotates and the gap formed in the plate cylinder coincides with the gripping side, the gripping side engages the plate cylinder due to the elasticity of the new plate. I do. For this reason, it is not necessary to stop the plate cylinder at a predetermined phase in advance at the time of starting the work for mounting the new plate, and this has a unique advantage that the control can be simplified.

Further, after transporting the new plate to the vicinity of the plate cylinder,
Since the sheet is conveyed to the plate cylinder in two stages, the parts around the plate cylinder and the new plate can be prevented from interfering with each other, and the degree of freedom in design layout of the parts arranged around the plate cylinder can be reduced. There is an advantage that it can be increased. In addition, by transporting the new plate in a positioned state, there is an advantage that the accuracy of attaching the new plate to the plate cylinder is greatly improved.

According to the plate exchange device of the present invention, the positioning accuracy when the new plate is held is improved by arranging the holding unit and the positioning unit on a common member. There are advantages. According to the plate exchange device of the present invention, positioning can be performed with a simple configuration by forming the positioning means with positioning pins that can be engaged with positioning holes formed in the new plate. .

Further, according to the plate exchange device of the present invention, since the positioning means has at least two positioning pins, at least two pins are provided, one pin on each side of the plate. The engagement allows the plate to be held perpendicular to the plate cylinder. According to the plate exchange device of the present invention, since the new plate is positioned by the positioning means at the standby position away from the rotary printing press main body and held by the holding means, ink mist on the new plate and Adhesion of paper powder can be reduced, and plate change failure due to failure to hold a new plate can be prevented. In addition, this can reduce the number of times of maintenance itself.

According to the plate exchange method of the present invention, the new plate is conveyed to the vicinity of the plate cylinder after holding and positioning the new plate (first step), and the tangential line of the plate cylinder is provided. The new plate is moved along the direction (second step), and the press side is applied to the new plate by bringing the gripping side of the new plate into contact with the plate cylinder (third step). In addition to this, there is an advantage that the pressurization can be applied to the new plate, and there is an advantage that a mechanism for rotating the plate, which has been conventionally required, can be omitted. In addition, by transporting the new plate in a positioned state, there is an advantage that the accuracy of attaching the new plate to the plate cylinder is greatly improved.

According to the plate exchange method of the present invention, the new plate is conveyed to the vicinity of the plate cylinder after holding and positioning the new plate (first step), and the holding side of the new plate is held. Is moved toward the peripheral surface of the plate cylinder (second step), and the gripping side of the new plate is brought into contact with the peripheral surface of the plate cylinder to apply pressure to the new plate (third step). Similarly to the above-described claim 7, there is an advantage that a new plate can be pressurized by a simple method, and there is an advantage that a mechanism for rotating the plate, which has been conventionally required, can be eliminated. . In addition, by transporting the new plate in a positioned state, there is an advantage that the accuracy of attaching the new plate to the plate cylinder is greatly improved. Furthermore, after the new plate is conveyed to the vicinity of the plate cylinder, it is conveyed to the plate cylinder in two steps (second and third steps), so that interference between components around the plate cylinder and the new plate can be avoided, There is an advantage that the degree of freedom in design layout of components arranged around the plate cylinder can be increased. In addition, by transporting the new version while positioning it,
There is an advantage that the accuracy of attaching the new version to the plate cylinder is greatly improved.

According to the plate exchange method of the present invention, the new plate is positioned and held at the standby position away from the main body of the rotary printing press. Adhesion of powder can be reduced, and plate change failure due to failure to hold a new plate can be prevented. This also has the advantage that the number of maintenances itself can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a main configuration of a plate changing apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram for briefly explaining the operation of the plate exchange device according to the first embodiment of the present invention.

FIG. 3 is a diagram for explaining in detail the operation of the plate exchange device according to the first embodiment of the present invention.

FIG. 4 is a schematic sectional view of a printing machine to which the plate changing device according to the first embodiment of the present invention is applied.

FIG. 5 is a diagram for briefly explaining the operation of a plate exchange device according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 New plate holding part 2 New plate (printing plate or plate) 2a Holding side 2b Holding butt side 3 Suction pad (holding means) as holding means 4 Positioning pin (pin register) as positioning means 5 Plate cylinder 6 New plate holding table 7 plate Pressing roller 8 Gap 8a Inserting end 8b Holding butt end 9 Clamp 10 Web 11 Blanket cylinder

Claims (9)

[Claims] 1. A plate changing device for mounting a new plate on a plate cylinder of a rotary printing press, comprising: holding means for holding the new plate; positioning means for regulating a holding position of the new plate by the holding means; A transport unit for transporting the new plate together with the holding unit and the positioning unit; the transport unit transports the new plate to the vicinity of the plate cylinder after positioning the new plate, and thereafter, along a tangential direction of the plate cylinder. A plate changing device characterized in that the plate is exchanged by moving the new plate and applying a pressure to the new plate by bringing a gripping side of the new plate into contact with the plate cylinder. 2. A printing plate changing apparatus for mounting a new plate on a plate cylinder of a rotary printing press, comprising: holding means for holding the new plate; positioning means for regulating a holding position of the new plate by the holding means; A transport unit for transporting the new plate together with the holding unit and the positioning unit; the transport unit transports the new plate to the vicinity of the plate cylinder after the positioning of the new plate, and thereafter, moves the gripping side of the new plate to the plate cylinder. A plate changing device configured to apply pressure to the new plate by moving the plate toward a peripheral surface of the plate. 3. The plate changing device according to claim 1, wherein said holding means and said positioning means are disposed on a common member. 4. The printing plate according to claim 1, wherein said positioning means comprises a positioning pin capable of engaging with a positioning hole formed in said new printing plate. Exchange equipment. 5. The method according to claim 1, wherein said positioning means has at least two positioning pins.
The plate exchange device according to claim 1. 6. The printing press according to claim 1, wherein the new printing plate is configured to be positioned by the positioning device at a standby position away from the main body of the rotary printing press and to be held by the holding device. The plate exchange device according to any one of claims 1 to 5. 7. A printing plate changing method for mounting a new plate on a plate cylinder of a rotary printing press, comprising: a first step of holding and positioning the new plate and transporting the new plate to the vicinity of the plate cylinder; A second step of moving the new plate along a tangential direction of the plate cylinder, and a third step of applying a pressure to the new plate by bringing a gripping side of the new plate into contact with the plate cylinder. A plate exchange method, characterized in that: 8. A printing plate changing method for mounting a new plate on a plate cylinder of a rotary printing press, comprising: a first step of holding and positioning the new plate and then transporting the new plate to a position near the plate cylinder; A second step of moving the gripper side of the new plate toward the peripheral surface of the plate cylinder, and a third step of bringing the gripper side of the new plate into contact with the peripheral surface of the plate cylinder to apply pressure to the new plate; A plate exchange method characterized by having: 9. The plate changing method according to claim 7, wherein the new plate is positioned and held at a standby position away from the main body of the rotary printing press.