JP2002187255A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of adjusting temperature and humidity of a printer, and especially capable of seasoning printing paper on standby. SOLUTION: A temperature and humidity adjusting means 16 is equipped with a temperature and humidity control unit 30 capable of supplying set hot air, a blow-off part 31a or 31c connected to the temperature and humidity control unit 30 through an air pipeline, and a detecting sensor 32a or 32c detecting the temperature and humidity of each part of the printer. Arranged outside of a cover CV covering the printer, the temperature and humidity control unit 30 is a means heating, cooling, humidifying and dehumidifying the air, and also a means capable of supplying the air controlled with its temperature and humidity to the inside of the printer. The temperature and humidity inside the printer is adjusted in such a manner that the air is selectively supplied to the blow-off part 31a or 31c from the temperature and humidity control unit 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus with a plate making mechanism provided with plate making means for forming an image on a printing plate on a plate cylinder based on image data.

[0002]

2. Description of the Related Art In recent years, a plate making apparatus for forming an image on a printing plate based on digital image data, a so-called CTP (Coating
2. Description of the Related Art A printing apparatus in which a mputer-to-plate is installed in a machine has been put to practical use, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-272756. Such a printing device is called a digital printing machine.Since a printed material is obtained directly from image data, it is suitable for on-demand printing such as multi-product small-volume printing, which requires a short working time, and the plate making process is automated. Therefore, it is a selling point that even an unskilled operator can easily handle it. Therefore, such a digital printing press is often installed not only in a conventional printing factory but also on a general floor such as a printing bureau or a print shop.

[0003]

However, a working environment suitable for printing is not always maintained on the general floor as described above. For example, the environmental humidity during the printing operation is preferably about 50 to 60%, and the printing paper is desirably about 5% to about 60%. On the other hand, in the above print shops etc., general cooling and heating and humidity adjustment according to customers are performed and it is not suitable for the printing work environment, or when the frequent exchange with the outside and the temperature and humidity are likely to change and so on. Furthermore, the above-described digital printing press may include a mechanism for developing the printing plate with a developing solution, and in this case, the temperature and humidity balance around the printing press may change particularly with the execution of the developing process. .

As described above, when the temperature and humidity around the printing press are not appropriate due to various factors, the density of the dampening solution, the density of the ink, and the like may be modulated and the print quality may not be maintained. Similarly, there is a case where the paper is expanded and contracted due to a change in the humidity of the printing paper, and the printing is not registered.

In order to solve the above-mentioned problems, for example, Japanese Patent Application Laid-Open No. 4-102373 and Japanese Patent Application Laid-Open
A technique described in, for example, Japanese Patent Application Laid-Open No. 19234 is known. In the former conventional technique, a room for closing a unit of a printing press is formed, and the temperature and humidity are adjusted and controlled in the room. Further, the latter conventional technique includes a seasoning mechanism that seasons the printing paper by humidifying and pressurizing immediately before feeding the printing paper.

In the former prior art, since the temperature and humidity inside the printing apparatus are adjusted by sealing the printing apparatus with a cover or the like, there is an advantage that it is possible to easily respond to changes in the environment outside the printing press. . However, this technique can control the temperature and humidity during printing, but cannot adjust the condition of printing paper before printing. For this reason, it is necessary to provide a dedicated room for storing the printing paper and the like, and to control the temperature and humidity of the room in advance to season the printing paper. However, the seasoning of the printing paper should be changed according to the printing conditions, but it is troublesome to adjust the temperature and humidity balance between the room and the printing apparatus in accordance with various printing conditions. Above all, the above-mentioned print shops and bureaus are often small, and it is difficult to provide a dedicated room for seasoning printing paper.

On the other hand, in the latter conventional technique, seasoning is performed by humidification or pressurization immediately before paper is fed, so that there is an advantage that it is not necessary to perform seasoning in advance from the pre-printing stage. . However, as disclosed in this prior art, it is difficult to optimally season the printing paper in a short time just before printing, and rapid seasoning may cause unevenness in expansion and contraction of the printing paper.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a printing apparatus having a mechanism capable of performing appropriate seasoning of printing paper before printing.

On the other hand, in the above-mentioned digital printing press, it is desired that the temperature and humidity adjustment be automated so that even an unskilled person can handle it. In the present invention, when viewed from another aspect,
It is an object of the present invention to provide a printing apparatus including a mechanism capable of performing appropriate temperature and humidity adjustment and seasoning adjustment according to printing conditions.

In view of another aspect, it is an object of the present invention to provide a printing apparatus having a plurality of plate cylinders, in which the temperature and humidity in the vicinity of each plate cylinder can be appropriately adjusted.

[0011]

According to a first aspect of the present invention, there is provided an image recording means for recording an image on a printing plate based on image data constituting a printed material. A printing device for performing printing by setting a housing that covers the printing device, a standby unit provided in the housing for holding printing paper, and a target temperature and humidity to be controlled in the standby unit. First target temperature / humidity setting means for performing the operation, first detection means for detecting an actual temperature / humidity in the standby section, and a temperature in the standby section based on the actual temperature / humidity and the target temperature / humidity. First temperature and humidity control means for adjusting humidity.

According to a second aspect of the present invention, in the printing apparatus according to the first aspect, the second detecting means for detecting a temperature and a humidity near a plate cylinder holding a printing plate, and the second detecting means. Second adjusting the temperature and humidity in the vicinity of the plate cylinder based on the
Temperature and humidity control means, wherein the temperature and humidity controlled by the first temperature and humidity control means are controlled independently of the temperature and humidity controlled by the second temperature and humidity control means. Features.

According to a third aspect of the present invention, in the printing apparatus according to the second aspect, the waiting section separates the printing paper used for the next printing operation from the printing paper used in the current printing operation. It is characterized in that it is kept on standby.

According to a fourth aspect of the present invention, in the printing apparatus according to the third aspect, the control by the second temperature and humidity control means is performed in accordance with the temperature and humidity conditions during the current printing operation.
The control by the temperature / humidity control means is adapted to the temperature / humidity conditions of the next printing operation.

According to a fifth aspect of the present invention, in the printing apparatus according to any one of the second to fourth aspects, the temperature and humidity controlled by the first temperature and humidity control means and the second temperature and humidity control means are different. , Which are set based on predetermined printing conditions.

According to a sixth aspect of the present invention, in the printing apparatus according to the fifth aspect, the printing conditions include a type of printing paper used for printing.

According to a seventh aspect of the present invention, in the printing apparatus according to any one of the second to sixth aspects, the printing apparatus further includes a developing unit for developing a printing plate recorded by the image recording unit. The detecting means is provided at a position separated from the developing means.

According to an eighth aspect of the present invention, in the printing apparatus according to any one of the second to seventh aspects, a plurality of the plate cylinders are provided, and the second detecting means and the second temperature / humidity control are provided. A plurality of means are provided corresponding to each plate cylinder.

According to a ninth aspect of the present invention, in the printing apparatus according to the eighth aspect, the plurality of second detecting means supply ink and / or dampening solution to the peripheral surface of each plate cylinder. It is characterized in that it is installed at a position equidistant from the position where it performs.

According to a tenth aspect of the present invention, in the printing apparatus according to the eighth aspect, the plurality of second detecting means are:
It is characterized by being installed at the same angle position with respect to the peripheral surface of each plate cylinder.

According to an eleventh aspect of the present invention, there is provided a printing apparatus including a plurality of plate cylinders and a temperature / humidity adjusting mechanism for adjusting and controlling the surrounding temperature and humidity of each plate cylinder, and covers the printing apparatus. A housing, a plurality of temperature / humidity detecting means provided in the vicinity of each of the plate cylinders, and generating air with controlled temperature / humidity according to a detection result by the temperature / humidity detecting means, and at least two air in the housing. Temperature and humidity control means for supplying air from the above-described outlets, and the temperature and humidity are adjusted and controlled in each vicinity of each of the plate cylinders.

According to a twelfth aspect of the present invention, in the printing apparatus according to the eleventh aspect, the plurality of temperature and humidity detecting means supplies ink and / or fountain solution to the peripheral surface of each plate cylinder. It is characterized by being installed at a position equidistant from the position.

According to a thirteenth aspect of the present invention, in the printing apparatus according to the eleventh aspect, the plurality of temperature and humidity detecting means are installed at the same angular position with respect to the peripheral surface of each plate cylinder. And

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing an example of a printing apparatus according to the present invention. As shown in FIG. 1, the printing apparatus has a first mechanism for holding a printing plate as a printing mechanism.
And second plate cylinders 1 and 2, first and second blanket cylinders 3 and 4 for transferring an ink image from each plate cylinder, and both blanket cylinders 3 and 4 holding printing paper.
, A paper feed cylinder 6 and a paper discharge cylinder 7 for supplying and discharging printing paper to and from the impression cylinder 5, and a printing plate on the first and second plate cylinders 1 and 2. Dampening solution supply means 8 and ink supply means 9 for supplying fountain solution or ink
And a paper feeding unit 10 for sequentially supplying the loaded unprinted printing paper and a paper discharging unit 11 for sequentially loading the printed printing paper.

On the other hand, this printing apparatus has a plate making mechanism,
A printing plate supply unit 12 for supplying an unexposed printing plate to the first and second plate cylinders 1 and 2; an image recording unit 13 for recording an image on a printing plate on the plate cylinder; And a printing plate discharging unit 15 for discharging a used printing plate. Each part of the printing apparatus is relatively airtightly covered with a cover CV,
Insulated from outside air. In other configurations,
This printing apparatus includes a temperature / humidity adjusting unit 16 for adjusting the temperature / humidity of each section of the printing apparatus, and a control section 17 for controlling each section of the printing apparatus.

The details of each section will be described below. First
1 is configured to be movable between a first printing position a indicated by a solid line in FIG. 1 and an image recording position b indicated by a dashed line in FIG. 1 is also configured to be movable between a second printing position c indicated by a solid line in FIG. 1 and an image recording position b indicated by a dashed line in FIG. That is, the first and second plate cylinders 1 and 2 are disposed at the first and second printing positions a and c, respectively, when performing a printing operation, and are sequentially alternated when performing a plate making operation. b, the plate making process of the printing plate is performed on each plate cylinder.

Each of the first plate cylinder 1 and the second plate cylinder 2 has a peripheral surface capable of holding a printing plate for two colors, and the printing plates of each color are opposed by 180 degrees on the peripheral surface. Two sets of gripping means (not shown) for fixing to the position are provided. In this embodiment, two printing plates having one printing area are mounted on the plate cylinder two by two. However, one printing plate having two printing areas arranged in a row is mounted. Is also good.

The first blanket cylinder 3 is configured to rotate in contact with the first plate cylinder 1 at the first printing position a, and the second blanket cylinder 4 is similarly rotated. The second printing position c is configured to rotate while contacting the second plate cylinder 2. The first and second blanket cylinders 3, 4 are provided with the first and second plate cylinders 1,
A blanket having the same diameter as 2 and capable of transferring ink images of two colors from each plate cylinder is mounted on the peripheral surface thereof.

The impression cylinder 5 is provided with the first and second plate cylinders 1,
It has a diameter of 1/2 and is configured to rotate in contact with both the first and second blanket cylinders 3,4. The impression cylinder 5 is provided with a gripper (not shown) capable of holding one sheet of printing paper having a size corresponding to a printing area on the printing plate. The gripper can be opened and closed at a predetermined timing by an opening / closing mechanism (not shown) to hold the printing paper.

The paper feed cylinder 6 and the paper discharge cylinder 7 have the same diameter as the impression cylinder 5 and are provided with not-shown grip means similar to the grip means provided on the impression cylinder 5. The gripping means of the paper feeding cylinder 6 and the paper discharging cylinder 7 are arranged so as to be able to transfer the printing paper in synchronization with the gripping means of the impression cylinder 5.

The first and second plate cylinders 1 and 2 arranged at the first and second printing positions a and c, the first and second blanket cylinders 3 and 4, the impression cylinder 5, Each of the paper feed cylinder 6 and the paper discharge cylinder 7 is provided with a drive gear (not shown) having substantially the same size as the diameter of each cylinder at the barrel end, and each gear is provided between the abutting cylinders. Are engaged. Therefore, by driving this gear by a printing drive motor (not shown), the respective cylinders can be rotationally driven synchronously.

In the printing apparatus of the present embodiment, since the plate cylinders 1 and 2 and the blanket cylinders 3 and 4 have twice the circumference of the impression cylinder 5, the plate cylinders 1 and 2 and the blanket cylinder 3 The impression cylinder makes two rotations each time 4 makes one rotation. Therefore, when the impression cylinder 5 makes two rotations while holding the printing paper, multicolor printing of a total of four colors, two colors each, can be performed from the first and second plate cylinders 1 and 2.

The dampening water supply means 8 is arranged in two sets for each of the plate cylinders 1 and 2 at the first and second printing positions a and c, respectively. A fountain solution can be selectively supplied to the printing plate. The dampening water supply means 8 includes a watercraft storing the dampening water, and a dampening water roller group that pumps up the dampening water in the watercraft and transfers it to the printing plate surface. The roller that comes into contact with the plate surface is configured to come into contact with or separate from the plate drum surface by a cam mechanism (not shown). If the printing plate does not require dampening water, the dampening water supply means 8 is not required.

Two ink supply means 9 are provided for each plate cylinder 1, 2 at the first and second printing positions a, c, respectively, and two printing plates on each plate cylinder 1, 2 are provided. Can selectively supply different color inks. For example, in this embodiment, K (black) and M (magenta) ink supply means 8 are arranged for the first plate cylinder 1 and C for the second plate cylinder 2. The color (cyan) and Y (yellow) ink supply means 8 are arranged. The ink supply means 9 includes an ink fountain means for storing ink, and an ink roller group for kneading the ink fed from the ink fountain means. It is configured to be brought into contact with or separated from the plate cylinder surface by a mechanism. Some of the dampening solution supply means 8 and the ink supply means 9 are configured so as to be able to be evacuated from the movement path thereof as the first and second plate cylinders 1 and 2 move.

The paper supply unit 10 takes out the print paper one by one from the pile 20 loaded with unused print paper and transfers it to the paper supply cylinder 6. The uppermost print paper of the pile 20 is sucked by a suction cup. It is configured to suck out one sheet at a time and feed it to a drive roller for sending it to the paper feed cylinder 6. In this embodiment, the operation is performed so as to supply the printing paper once every two rotations of the paper feeding cylinder.

On the other hand, the paper supply section 10 is provided with a pile 21 of printing paper used in the next printing separately from a pile 20 for taking out the printing paper at the time of printing. This pile 21 is opened and closed by a cover 22 inside the cover CV.
(Only the position of the cover is shown by a two-dot chain line in the figure) and is arranged in the preliminary temperature / humidity adjustment area 23 covered by the pile 21.
Of the pile 20 can be exchanged to the position of the pile 20 by the transport means 25. Opening / closing cover 22
Is composed of an accordion curtain that can be manually opened and closed, and the preliminary temperature and humidity adjustment area 2
3 need not be completely airtight.

The paper discharge section 11 receives printed paper from the paper discharge cylinder 7 and stacks the print paper. In this embodiment, the paper discharge section 11 includes a chain gripper unit wrapped around the paper discharge cylinder 7, And a discharge table on which the printed printing paper is loaded.

Next, the plate making mechanism of the printing apparatus will be described. In this printing apparatus, when performing a plate making operation, the first and second plate cylinders 1 and 2 are alternately moved to a common image recording position b. At this image recording position b, a friction roller (not shown) is brought into contact with the plate cylinder to be driven to rotate.

The printing plate supply unit 12 includes a cassette roll for storing a roll-shaped unexposed printing plate in a light-shielded state, a transport roller and a transport guide for transporting the drawn printing plate to the plate cylinders 1 and 2, and the printing plate. Cutting means for cutting the sheet into a sheet shape. In this embodiment, a silver salt sensitive material that exposes and records an image with a laser beam is used as a printing plate. However, for example, a type of printing plate that performs melting, peeling, chemical change, ablation, or the like with a laser may be used. good.

The printing plate supply operation procedure is as follows. First, the leading end of the printing plate pulled out from the cassette roll is clamped by gripping means (not shown) of the plate cylinders 1 and 2, and in this state, the plate cylinders 1 and 2 are rotated. Then, the printing plate is wound on the plate cylinders 1 and 2,
Thereafter, the printing plate is cut at a predetermined length, and the rear end of the printing plate is held by the other holding means.

The image recording section 13 turns on / off the laser light.
Exposure is performed on the printing plate by f to record an image. The image recording unit 13 includes, for example, a multi-beam head in which a plurality of laser light sources are arranged in the axial direction of the plate cylinders 1 and 2. The printing plate is operated by being moved along the direction. In the present embodiment, two printing plates are mounted on the plate cylinders 1 and 2, respectively, so that images for two colors are simultaneously recorded.

The developing section 14 develops the printing plate exposed by the image recording section 13. In this embodiment, the developing unit 14 has a configuration in which the processing liquid stored in the processing tank is pumped up by an application roller and applied to a printing plate to perform a developing process. It moves to a lower position to retract and an upper position to approach the plate cylinder. That is, the developing unit 14 is configured to be at a lower position when the plate cylinders 1 and 2 move to the image recording position b, and move to an upper position during the developing process. In the developing section 14, a processing solution required only during development is stored in a processing tank, and the vapor of the processing solution is prevented from spreading into the apparatus except during development. If necessary, a ventilation port for discharging unnecessary processing liquid vapor is provided near the developing unit 14. If an image recording method that does not require a developing process is adopted, the developing unit 14 may be omitted.

In this printing apparatus, the first and second plate cylinders 1 and 2 are moved to the image recording position b, and the printing plate is supplied, and the image is recorded and developed to perform the plate making operation. When the plate making operation is completed, the printing operation can be performed with the first and second plate cylinders 1 and 2 arranged at the first and second printing positions a and c, respectively.

On the other hand, the printing apparatus can automatically discharge the printing plate after the printing operation is completed. In this embodiment, the printing plate discharge unit 15 includes a separating unit that separates the printing plate from the plate cylinder at the image recording position, a conveying unit that conveys the separated printing plate, and a conveyed used printing plate. And a discharge cassette for discharging the paper.

Next, the temperature / humidity adjusting means 16 and the control means 17 according to the present invention will be described. Temperature / humidity adjusting means 16
Is a temperature and humidity control unit 3 that can supply the set hot air.
0, blow-out sections 31a to 31c provided with air piping for the temperature and humidity control unit 30, and detection sensors 32a to 32c for detecting the temperature and humidity of each section of the printing apparatus. The temperature / humidity control means 16 is electrically connected to the control means 17, and its operation is controlled.

The temperature and humidity control unit 30 includes the cover C
This is a means that is disposed outside the V and is capable of heating and cooling air and humidifying and dehumidifying the air to supply air with controlled temperature and humidity into the printing apparatus. The temperature / humidity control unit 30 is individually piped between the blow-out portions 31a to 31c (FIG. 1).
Is schematically shown by a dotted line), and the air whose temperature and humidity have been adjusted is selectively supplied into the printing apparatus from each of the blowout portions 31a to 31c.

The blowing section 31a is disposed near the first plate cylinder 1, the blowing section 31b is disposed near the pile 21 in the preliminary temperature / humidity adjustment area, and the blowing section 31c is disposed near the second plate cylinder 2. And each of the blowing portions 31
Rectifying parts 33a to 33c are mounted on the front surfaces of the outlets a to 31c so that the air to be blown out is appropriately dispersed. This is to prevent the blown air from being strongly blown directly onto the plate surface or the roller surface. The temperature / humidity control unit 30 is capable of independent control of three systems so that air with different temperature and humidity or air with different air volume is supplied to the blowout portions 31a to 31c, respectively.

The detection sensors 32a to 32c are sensors for detecting the temperature and humidity near the installed surroundings and outputting the detected values of the temperature and humidity to the control means 17 connected thereto. Then, detection sensor 3
The reference numerals 2a and 32c are provided near the first plate cylinder 1 and the second plate cylinder 2, respectively, and the detection sensor 32b is provided in the preliminary temperature / humidity adjustment area 23.

Here, the installation positions of the detection sensors 32a and 32c will be described with reference to FIG. FIG. 2 is an explanatory diagram showing the installation position of the detection sensor with respect to the plate cylinder peripheral surface. In the figure, it is assumed that the supply of dampening solution and ink for two plates to the peripheral surface of the first plate cylinder 1 is performed in a region S1 from point p1 to point p2. Similarly, it is assumed that the supply of dampening water and the supply of ink for the two plates to the peripheral surface of the second plate cylinder 2 is performed in a region S2 from the point q1 to the point q2.

In this state, the detection sensors 32a and 32c are installed at points p3 and q3, respectively, which are circumferentially equidistant from the points p2 and q2. That is, the temperature and humidity around the plate cylinders 1 and 2 can be detected at the same timing after the dampening solution and the ink are supplied to the plate cylinders 1 and 2. Thereby, the measurement conditions for the two plate cylinders 1 and 2 can be approximated as much as possible.
However, in this embodiment, each detection sensor 32a, 32c
Are provided after the p2 and q2 points at which the supply of the dampening solution and the ink has been completed, but they may be provided at the same timing position before this.

In this embodiment, since the mechanism for moving the plate cylinders 1 and 2 is provided, if the detection sensor 32a is installed at a position facing the peripheral surface of the plate cylinder, for example, interference occurs when the plate cylinder is moved. There are two ways to solve this problem.

The first method is to use two detection sensors 32a
Are disposed outside both shaft ends of the plate cylinder 1 so as not to interfere with the movement of the plate cylinder, and an average value of both sensors is used. In this case, it is needless to say that the other detection sensor 32c preferably has the same configuration. This method has an advantage that the detection sensor 32a does not interfere even if the plate cylinder moves.

The second method is a method in which the detection sensor 32a disposed opposite to the peripheral surface of the plate cylinder 1 can be retracted from the plate cylinder moving path. For example, a detection sensor 32a may be installed at the tip of a drive arm (not shown) or the like, and the drive arm may be driven when the plate cylinder is moved to retract the detection sensor from the peripheral surface of the plate cylinder. In this case, a retracting mechanism for the detection sensor is required, but the printing apparatus can be used at a position close to the peripheral surface of the plate cylinder even with the printing cylinder moving type printing apparatus.

In the above description, the detection sensors 32a, 3
The installation position of 2c is set at a position relatively equidistant from the supply position of the dampening solution and the ink.
They may be provided at approximately the same angular position with respect to the installation positions of 1a and 31c. For example, in the example of FIG.
Since 2c is disposed immediately below the plate cylinder 2, the other detection sensor 32a may be provided near the plate cylinder 1 (in the vicinity of point p1 in FIG. 2) in accordance with this. In this case, since the respective detection sensors can be similarly arranged at the same angular position on the plate cylinder in the printing apparatus, there is an advantage that it is easy to adjust conditions such as the flow of air according to the arrangement of the printing unit.

Further, in the printing apparatus according to the present embodiment, development processing is performed at the time of plate making. In this development processing, a processing liquid having a temperature relatively higher than the ambient temperature is used, and the vapor may have an effect on the temperature and humidity detection accuracy. Therefore, when the temperature of the processing liquid to be used is high and the processing liquid vapor is large, or when there is no ventilation port in the vicinity of the developing section, the detection sensors 32a and 32c are used as much as possible.
It is preferable to arrange them in more isolated positions. For example, in FIG. 2, it is the q3 point where the detection sensor 32c is arranged.

The control means 17 comprises a microcomputer provided with various input / output means, storage means, and the like. In the present embodiment, the control means 17 controls the entire printing apparatus and also executes the temperature and humidity control according to the present invention. This control means 17
The current temperature and humidity of each part of the printing press are determined based on the detection values from the detection sensors 32a to 32c. Then, the temperature / humidity control unit 30 is controlled so as to reach a preset target temperature / humidity, and necessary air is supplied from each of the blowout portions 31a to 31c.

Next, using the operation flowchart of FIG.
The temperature and humidity control operation procedure according to the present invention will be described. First, in step S11, printing conditions in the printing operation are set. The printing conditions include, for example, the type of printing paper, and other conditions include types of dampening solution and ink,
The printing speed is also used. In step S12, the target temperature and humidity specified in advance are controlled by the controller 17 in accordance with the printing conditions.
Read from the storage means inside. Thus, the operator can set appropriate temperature and humidity adjustments only by setting printing conditions such as the type of printing paper. This is advantageous in that temperature and humidity adjustments are automatically set when printing conditions change, so that appropriate control can always be performed without forgetting to make settings by the operator.

In the present embodiment, the target temperature and humidity inside the printing apparatus are set in accordance with the printing conditions. The target temperature and humidity of the preliminary temperature and humidity adjustment area 23 are set in accordance with the next printing operation. That is, in the present embodiment, in the preliminary temperature / humidity adjustment area 23, printing paper to be used for the next operation is set in advance so that seasoning before printing can be performed. For example, the humidity can be controlled independently such that the humidity near the plate cylinders 1 and 2 is about 50% and the humidity near the preliminary temperature / humidity adjustment area 23 is about 60%. Thereby, seasoning of the printing paper used for each operation can be performed.

Further, since the printing paper is independent as described above, it is possible to rapidly adjust the humidity in the preliminary temperature / humidity adjusting area 23 for the printing paper which has been excessively dried or wetted before the printing operation. Further, if the preliminary temperature / humidity adjustment area 23 is separated by the opening / closing cover 22, even if the printing paper is replaced from the outside into the preliminary temperature / humidity adjustment area 23 during the printing operation, the influence on the printing apparatus main body side is small.

In step S13, each detection sensor 32
The temperature and humidity of each part are detected by a to 32c. This detection is performed, for example, at predetermined time intervals. Step S
At 14, the temperature / humidity detected by the control means 17 is compared with the target temperature / humidity. If the difference exceeds the allowable value, the process proceeds to step S15. If it is an allowable value, step S1
Return to 3.

In step S15, the temperature / humidity control unit 30 is operated in accordance with the result of the comparison, and the air whose temperature and humidity have been appropriately adjusted is blown out by the corresponding blowing section 31a to 31.
c is selectively blown out. For example, when the difference by the comparison is large, rapid control is required, so that the air flow is increased, and when the difference is small, the air flow is reduced. Then, the control operations of steps S13 to S16 are repeated until it is determined in step S16 that the work is completed.

[Other Embodiments] In the above embodiment, the temperature and humidity in the preliminary temperature and humidity adjustment area 23 are controlled independently of the temperature and humidity near the plate cylinder. Instead of the area 23, the printing paper piled in the paper feeding unit 10 and waited may be independently adjusted in temperature and humidity.

In the above embodiment, the target temperature / humidity is set in accordance with the printing conditions. However, other factors, such as the temperature / humidity of the floor and the finish of printing, may be considered. .

[0064]

According to the first aspect of the present invention, since the temperature and humidity can be adjusted while the print paper is on standby, the print quality can be stabilized.

According to the second aspect of the present invention, the temperature and humidity in the vicinity of the plate cylinder during the printing operation can be adjusted independently, so that the temperature and humidity can be adjusted more accurately.

According to the third aspect of the present invention, since the printing paper for the next operation can be kept on standby, the printing paper to be used for the next operation can be seasoned in advance.

According to the fourth aspect of the present invention, since the temperature and humidity control of the printing paper in the next operation can be set under different conditions, it is possible to cope with each operation condition.

According to the fifth and sixth aspects of the present invention,
Since the temperature and humidity control is set in accordance with the printing conditions, the operator does not need to consider complicated temperature and humidity conditions.

According to the seventh aspect of the present invention, since the detecting means is located at a position separated from the developing means, the influence of vapor such as a developing solution can be reduced.

According to the eighth aspect of the invention, even in a printing apparatus having a plurality of plate cylinders, it is possible to adjust the temperature and the humidity around each plate cylinder.

According to the ninth aspect of the present invention, since the positions of the detecting means with respect to the plurality of plate cylinders are set at the same distance from the dampening solution and the ink supply position, the conditions at the time of measurement are substantially the same. can do.

According to the tenth aspect of the present invention, since the positions of the detecting means with respect to the plurality of plate cylinders are set at approximately the same angular position, the arrangement of the symmetric printing unit and the arrangement of the blowing unit can be reduced. Can be matched.

According to the eleventh aspect of the present invention, even in a printing apparatus having a plurality of plate cylinders, it is possible to adjust the temperature and the humidity around each plate cylinder.

According to the twelfth aspect of the present invention, since the positions of the detecting means with respect to the plurality of plate cylinders are set at the same distance from the fountain solution and the ink supply position, the conditions at the time of measurement are substantially the same. can do.

According to the thirteenth aspect of the present invention, since the positions of the detecting means with respect to the plurality of plate cylinders are set at approximately the same angular position, the arrangement of the symmetric printing unit and the arrangement of the blowing unit are reduced. Can be matched.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of a printing apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a positional relationship of each detection sensor with respect to a plurality of plate cylinders.

FIG. 3 is a flowchart illustrating a temperature / humidity control procedure in the printing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st printing cylinder 2 2nd printing cylinder 3 1st blanket cylinder 4 2nd blanket cylinder 5 Impression cylinder 6 Paper supply cylinder 7 Paper discharge cylinder 8 Dampening water supply means 9 Ink supply means 10 Paper supply section 11 Paper discharge unit 13 Image recording unit 14 Developing unit 16 Temperature / humidity adjusting means 17 Control means 20, 21 Print paper pile 22 Open / close cover 23 Preliminary temperature / humidity adjusting area 30 Temperature / humidity control unit 31a-31c Blow-out unit 32a-32c Detection sensor 33a- 33c rectifier

Claims (13)

[Claims] 1. A printing apparatus, comprising: an image recording unit that records an image on a printing plate based on image data that constitutes a printed matter, and performs printing using the printing plate on which the image is recorded. A standby unit provided in the housing for holding printing paper; a first target temperature / humidity setting unit for setting a target temperature / humidity to be controlled in the standby unit; First for detecting the actual temperature and humidity in the section
And a first temperature / humidity control unit that adjusts the temperature / humidity in the standby unit based on the actual temperature / humidity and the target temperature / humidity. 2. A second detecting means for detecting the temperature and humidity near a plate cylinder holding a printing plate, and a second temperature for adjusting the temperature and humidity near the plate cylinder based on the second detecting means. Humidity control means, wherein the temperature and humidity controlled by the first temperature and humidity control means are controlled independently of the temperature and humidity controlled by the second temperature and humidity control means. The printing device according to claim 1. 3. The printing apparatus according to claim 2, wherein the waiting unit keeps printing paper to be used for the next printing operation separately from printing paper being used in the current printing operation. apparatus. 4. The control by the second temperature and humidity control means is adjusted to the temperature and humidity conditions during the current printing operation, and the control by the first temperature and humidity control means is adjusted to the temperature and humidity conditions of the next printing operation. The printing apparatus according to claim 3, wherein: 5. The temperature and humidity controlled by said first temperature and humidity control means and said second temperature and humidity control means are set based on predetermined printing conditions. 5. The printing device according to any one of 4. 6. The printing apparatus according to claim 5, wherein the printing condition includes a type of printing paper used for printing. 7. A developing device for developing a printing plate recorded by the image recording device, wherein the second detecting device is provided at a position separated from the developing device. 7. The printing device according to any one of 2 to 6. 8. The printing apparatus according to claim 2, wherein a plurality of plate cylinders are provided, and a plurality of said second detection means and a plurality of second temperature / humidity control means are provided for each plate cylinder. 8. The printing device according to any one of 7. 9. The printing apparatus according to claim 1, wherein the plurality of second detection units are provided at positions equidistant from a position at which ink and / or dampening solution is supplied to a peripheral surface of each plate cylinder. Item 9. A printing device according to Item 8. 10. The printing apparatus according to claim 8, wherein the plurality of second detection units are installed at the same angular position with respect to the peripheral surface of each plate cylinder. 11. A printing apparatus comprising: a plurality of plate cylinders; and a temperature / humidity adjusting mechanism for adjusting and controlling the surrounding temperature and humidity for each plate cylinder, wherein the housing covers the printing device; A plurality of temperature / humidity detecting means provided in the vicinity of the trunk, and, in accordance with the detection result by the temperature / humidity detecting means, generate air with controlled temperature and humidity and air from at least two or more outlets in the housing. And a temperature / humidity control means for supplying, wherein the temperature / humidity is adjusted and controlled for each neighborhood of each plate cylinder. 12. The apparatus according to claim 1, wherein said plurality of temperature and humidity detecting means are installed at positions equidistant from a position at which ink and / or fountain solution is supplied to a peripheral surface of each plate cylinder. 12. The printing device according to item 11. 13. The printing apparatus according to claim 11, wherein said plurality of temperature and humidity detecting means are installed at the same angular position with respect to the peripheral surface of each plate cylinder.