JP2009166435A - Stencil printing device with exclusive table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cope with the problem that the new method not causing disadvantage for reusing after not using for a long period ink even though the ink of the printed matter quickly dries because fingers or others are stained when rubbing an image face because the ink hardly infiltrates into paper in the printed matter immediately after printing since the ink not hardening and drying at all though leaving the ink in air is used to make it easy to use next time even though the not using condition lasts long after the completion of printing in a stencil printing device. <P>SOLUTION: Instruction not to leave a plate cylinder after completion of printing as it is and to store a printing drum unit in the closed type storing space exclusive for a printing drum arranged in an exclusive table is shown in the display section of the printing device body. In the case of leaving the plate cylinder as it is automatic cleaning is carried out after a predetermined time lapses. The exclusive table has the function of checking the storing period of the drum unit and the display is shown to carry out cleaning when a predetermined period lapse. Next printing is forbidden when the cleaning is not carried out. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a stencil printing apparatus, and more particularly to measures for preventing ink solidification of a printing drum when not in use.

  A stencil sheet made by making a stencil is wound around the outer periphery of the stencil sheet, and a cylindrical plate cylinder that is driven to rotate around its central axis, and an ink supply that is provided in the cylindrical plate cylinder and supplies ink to the inner surface of the cylindrical plate cylinder And a printing pressure device that presses the fed printing paper against the outer peripheral surface of the plate cylinder, and forms a printed image by transferring the ink that has passed through the perforating plate making portion of the stencil base paper onto the printing paper. This type of stencil printing apparatus is already well known.

The ink used in such a stencil printing apparatus is one that never solidifies and dry even when left in the air. Specifically, an ink having a water-in-oil (W / O type) emulsion structure is used. That is, the aqueous phase is uniformly dispersed in the oil phase. Even if the ink inside the printing press is in direct contact with the atmosphere, the structure can prevent the ink components from being denatured or cured, and has storage stability.
This means that even if the stencil printing device has been used without any special cleaning operation, and the printing device has been left unused for a long time, printing can be performed immediately without special skillful operation during reuse. This is because it is required. For example, a teacher uses a printing machine at school, but even if it is not used for 1 to 2 months after entering the summer vacation, it is required that it can be used as before without any problems at the time of reuse. . If the ink inside does not cure and is transferred onto the paper, pseudo drying is created by penetration between the fibers of the paper and evaporation of the aqueous phase in the ink. However, drying was insufficient because it was not drying or fixing by chemical reaction. In other words, if the printed image is rubbed with a finger, the finger is stained with ink.

  Therefore, in the printed matter by the stencil printing device, the drying speed of the image ink is slow, and the fingers get dirty when the printed matter is taken out or aligned. If the paper with poor permeability such as coated paper cannot be printed, or if a solid image is printed, the back side of the paper on the output tray will stain the back side of the paper when it is stacked. There was a problem that a problem of depression occurred.

Thus, many proposals have been made so far in order to improve the drying property of printed images of stencil printing. For example, a method of changing to ultraviolet curable ink and irradiating the printed matter with ultraviolet rays after printing to cure is most effective (for example, see Patent Document 1 and Patent Document 2).
There have also been proposed a method for heating the image surface of a printed matter with a heater or far infrared rays to promote water phase evaporation in the ink, and a method for promoting a reaction inside the ink by applying a high frequency to the image surface ink of the printed matter. (For example, refer to Patent Document 3 and Patent Document 4).

  Ink containing a component that hardens by reacting with oxygen in the air, paper that is dried using the action of vaporizing the solvent component in the ink by leaving it in the air or over time, paper There is known a method of using an ink of a system that exhibits an effect of promoting a curing reaction inside an ink that has been converted into a thin film and a function of curing an internal resin component. This contains, for example, a resin having an iodine value (oxidized polymerization form) (see, for example, Patent Document 5). Alternatively, a method using a water-based ink is a method that contains a water-soluble polymer compound and is not immediate but can be expected to be completely dried over time (see, for example, Patent Document 6). ).

The method of changing to ultraviolet curable ink and irradiating the printed matter with ultraviolet rays after printing has the safety and smell problems of the ultraviolet curable ink itself, the safety of the ultraviolet irradiation lamp and the problem of ozone generation. There is a problem that the ink itself is expensive and the ultraviolet irradiation device is also expensive.
The method of heating the image surface of the printed matter with a heater or far infrared rays to promote evaporation of the aqueous phase in the ink requires high-capacity equipment because it is a high-speed printing, and the water contained in the paper itself is evaporated. However, there is a problem that heat is consumed and effective drying of the ink cannot be expected, and the paper curls due to high heat.
When printing with high-viscosity ink or powder ink, the method of temporarily softening and lowering the viscosity by heating etc. makes it difficult to stably supply the ink, and the softening of the ink by the heat treatment unit becomes unstable It is difficult to obtain stable dry curing. The method of applying the powder on the printed material can only be expected to have an effect of preventing temporary back-lighting.

A method of using ink in which the resin component is cured integrally with the pigment by vaporizing the solvent component in the ink, or the resin component is cured integrally with the pigment by evaporating the aqueous component The method using such an ink is effective in ensuring the drying and fixing property of the printed matter, and the most important feature is that no special fixing device is required and the cost of the ink itself is small.
However, it is clear that the porous metal thin plate and the screen mesh constituting the cylindrical plate cylinder of the printing drum are clogged due to the solidification of the ink when left unused. This is because, in the portion where the ink spreads and the surface area is increased, the water and solvent in the ink easily evaporate from the portion that has been exposed to the air, so that the ink is dried at an early stage. For example, if there is no application and the printing machine is not used for one week, and printing is attempted after one week, the ink will be clogged in the plate cylinder, and there will be a problem that the image becomes thinner or does not come out. In this case, there is a problem that it is necessary to clean the plate cylinder portion, which takes a lot of time, labor and cost.

Japanese Utility Model Publication No. 4-35188 JP-A-5-64878 JP 2001-71617 A JP 2001-150784 A JP 2004-149810 A JP 2001-302955 A

  In the present invention, a porous cylindrical thin plate or a screen mesh constituting a cylindrical plate cylinder after standing for a long time can be obtained by solidifying the ink even if an ink having a great effect for drying and fixing a printed image in stencil printing is used. It is an object of the present invention to provide a novel stencil printing apparatus and a dedicated table thereof, which are provided with measures for preventing ink solidification, which can prevent clogging and the occurrence of an image.

As a result of conducting a confirmation experiment on clogging of the printing drum plate cylinder using a prototype ink with improved fixing properties, we discovered a new fact. When the printing drum is left outside after printing is finished, it is confirmed that the ink left in the plate cylinder has an abnormally high viscosity when it is left for a week. Was started, but no image appeared, and an insufficient image started to appear after printing about 1000 sheets. However, using a printing drum under the same conditions and storing it in a box in a sealed space, it was confirmed that an image could be obtained except for the first few sheets even after one week. This means that if the surface of the ink held by the plate cylinder touches new air one after another, evaporation drying proceeds, but if there is no air movement and the environment is difficult to evaporate, the drying speed will be slow.
However, when ink having improved fixability is used, it is impossible to prevent clogging of the plate cylinder as a result unless proper operation and storage are performed. Therefore, it is necessary to devise in order to ensure operation and handling. And it is also necessary to devise ways to prevent erroneous operations.

  The invention according to claim 1 is a stencil printing apparatus with a dedicated table for mounting the stencil printing apparatus, wherein the dedicated table can store a printing drum unit (hereinafter simply referred to as a unit) removed from the stencil printing apparatus. There is at least one drum storage space (hereinafter simply referred to as a storage space), the storage space has an opening / closing part that allows the unit to be taken in and out, and when the opening / closing part is closed, the storage space is kept airtight, The stencil printing apparatus has a warning display, and includes at least one sensor that substantially forms a sealed space, the unit is stored in the storage space, and the opening / closing portion is closed. A display unit that can be performed, and a control device including a timing device, wherein the control device has the unit stored in the storage space; and Time is measured from the time when the opening / closing part is closed, and if the sensor is activated even after a predetermined first predetermined time has passed, the display part informs of the danger of ink solidification. A display or a display for instructing an operation for preventing ink solidification is performed.

According to a second aspect of the present invention, in the stencil printing apparatus with a dedicated table according to the first aspect, the display is a printing drum cleaning mode in which the unit stored in the storage space is taken out and mounted on the main body of the printing apparatus. It is a display which instruct | indicates to store in the said storage space again after performing this.
In the invention according to claim 3, in the stencil printing apparatus with a dedicated table according to claim 2, when the display is performed, if it is within a predetermined second predetermined time, the next plate making or When the printing operation is permitted and the second predetermined time is exceeded, the next plate making or printing operation is permitted when the printing drum cleaning mode is executed.
According to a fourth aspect of the present invention, in the stencil printing apparatus with a dedicated table according to any one of the first to third aspects, the control device includes a drum unit on the display unit after the unit has completed the printing process. Is displayed to prompt the user to extract and store it in a dedicated table.

According to a fifth aspect of the present invention, in the stencil printing apparatus with a dedicated table according to the fourth aspect, the control device continues even after the third predetermined time elapses after the unit finishes the printing process. When it is determined that the printer is still attached to the printing apparatus main body, a warning is displayed and the same display is again displayed on the liquid crystal display.
According to a sixth aspect of the present invention, in the stencil printing apparatus with a dedicated table according to the fourth or fifth aspect, the control device is configured such that a predetermined fourth predetermined time elapses after the unit finishes the printing process. When it is determined that the printer is still attached to the printing apparatus main body, the display unit is displayed to perform cleaning, and the next plate making or printing is prohibited until the cleaning is completed. .

According to a seventh aspect of the present invention, in the stencil printing apparatus with a dedicated table according to any one of the fourth to seventh aspects, the control device is configured to perform a fifth predetermined predetermined after the unit has completed the printing process. The drum cleaning mode is automatically executed when it is determined that the printer remains attached to the printing apparatus main body even after a lapse of time.
According to an eighth aspect of the present invention, in the stencil printing apparatus with a dedicated table according to any one of the first to seventh aspects, the dedicated table includes a control device having a timing device and a display device. The display device performs display similar to the content displayed on the display unit of the printing apparatus main body.

  According to the present invention, in a stencil printing apparatus, there is provided a drum storing method capable of reducing the number of times of cleaning, even when ink having a fast drying and good fixability is used or when the printing drum is not used is relatively difficult to dry. can do

FIG. 1 is an overall schematic diagram of a stencil plate-making printing apparatus and a dedicated table according to an embodiment of the present invention.
In the figure, reference numeral 1 denotes a stencil printing apparatus, and 2 denotes a dedicated table for supporting the stencil printing apparatus. Other symbols are quoted as needed in the description.
In the stencil printing apparatus 1, reference numeral 3 denotes a scanner unit for reading a document image. The scanner unit 3 has a pressure plate 4 that can be opened and closed on its upper surface, and an ADF unit 5 for automatically and sequentially feeding a plurality of documents. is doing. Reference numeral 6 denotes a plate making and supplying apparatus, in which a stencil sheet 7 wound in a roll is pressed against a thermal head 9 by a platen roller 8 and conveyed while being perforated.
Then, the leading end of the stencil sheet is wound around the outer periphery of the printing drum 10 and is cut by a cutter 12 at a predetermined length. Reference numeral 13 denotes a stencil discharging apparatus that peels used stencil paper from the outer periphery of the printing drum 10 and conveys and stores it. The plate discharge device 13 is provided with plate discharge rollers 14 and 15 for peeling and transporting the stencil sheet, a compression plate 16 for pushing the plate, and a plate storage box 17 for storing the plate.

The printing paper 20 is conveyed from above the paper feed table 21 by a paper feed roller 22 and is separated one by one by a separation roller 23 and a separation pad 24, and further by a pair of downstream registration rollers 25 and 26. It is sent to the printing section in time.
Reference numeral 27 denotes a press roller that presses the printing paper 20 against the printing drum 10 to form an image. The pressing roller 27 is controlled to be pressed by another driving source. Reference numeral 28 denotes a peeling claw for peeling the printed paper from the printing drum 10, and reference numeral 29 denotes a conveying belt device that sucks and conveys the paper printed by the printing drum 10. The printing paper on which the image is formed by the printing drum 10 in this manner is transported by the transport belt device 29 and discharged and stacked on the paper discharge tray 30.

FIG. 2 is a view showing a printing drum of the present invention.
Here, the printing drum 10 is a unit that can be pulled out from the stencil printing apparatus 1 in the front direction and attached or detached.
The printing drum unit 31 (hereinafter simply referred to as the unit 31) is composed of a cylindrical plate cylinder 32, an ink roller 33 serving as an ink supply device provided therein, a doctor roller 34, an ink reservoir 35, and an ink reservoir 35. An ink pump 36 and an ink container 37 for supplying ink to the drum, and a drum unit frame 38 for rotatably holding the cylindrical plate cylinder 32 and holding other components. A pre-made stencil sheet 40 is wound around the outer periphery of the cylindrical plate cylinder 32 by a clamper 11 and wound with ink adhesion.
A part of the drum unit frame 38 forms rail-like members 38 a and 38 b provided in parallel to the rotation axis of the cylindrical plate cylinder 32.
The stencil printing apparatus 1 is provided with fixed guide rails 39 a and 39 b for guiding the rail-like members 38 a and 38 b and inserting the unit 31 into the stencil printing apparatus 1. When the unit 31 is inserted, the pushing direction position is accurately positioned by a lock mechanism (not shown).

As shown in the enlarged partial view, the cylindrical plate cylinder 32 includes a cylindrical metal body 41 having a large number of ink passage holes in a print image range and a one or two-layer mesh screen 42 mounted on the outer periphery thereof. Thus, the stencil sheet 40 made on the outer peripheral surface is wound and mounted by the adhesive force of the ink.
The ink supply device provided inside the cylindrical plate cylinder 32 includes an ink supply roller 33, a doctor roller 34 provided with a slight gap in parallel therewith, and an ink pool 35 formed by these two rollers. And a sensor 43 for detecting the amount of ink in the ink reservoir 35. The ink in the ink reservoir 35 is supplied to the inner surface of the cylindrical plate cylinder 32 by the rotation of the ink supply roller 33.
The ink pump 36 functions to suck ink in the detachable ink container 37 and to drop the ink from the ink discharge pipe 44 to the ink reservoir 35. In a normal printable state, the inner surface side of the cylindrical metal body 41 is covered with an ink film 45 of a certain thickness, and the holes and the mesh screen 42 of the cylindrical metal body 41 always receive a predetermined amount of ink. keeping.

  The dedicated table 2 is provided with printing drum storage spaces (hereinafter simply referred to as storage spaces) 50a and 50b. As in the case of the fixed guide rails 39a and 39b in the stencil printing machine 1, two table fixed guide rails 51a and 51b are provided in the storage spaces 50a and 50b, respectively. Thus, the unit 31 can be inserted into the storage spaces 50a and 50b of the dedicated table 2 and stored using the rail-like members 38a and 38b. In this figure, the front side opening / closing portions of the storage spaces 50a and 50b are omitted. The storage spaces 50a and 50b are devised in shape so that there is no empty space when the unit 31 is stored. For example, the lower section has a cylindrical shape in accordance with the drum. If a small water tank Wa is provided at the lowermost part and a small amount of water is applied to the water tank Wa, the water vapor pressure in the sealed space will be almost 100% at all times. Since evaporation is suppressed, it is preferable.

FIG. 3 is a sectional view of the dedicated table as viewed from above.
Here, the unit 31 is stored in the storage space 50a. At the entrance of the storage space 50a, a front door cover 53a that can be opened and closed with the rotation center 52a as a reference is provided with a handle 54a. When the front door cover 53a is closed, it is locked by means (not shown), and in the closed state, a rubber packing 55a is provided around the entrance so as to form a sealed space that can be kept almost airtight. Is provided. Reference numeral 56a denotes a sensor for detecting whether or not the unit 31 is stored. The dedicated table has a control device 72 (see FIG. 6) equipped with a time measuring device, and when the unit 31 is stored in the storage space, the sensor 56a changes from on to off to be in an operating state. Recognize Of course, the on / off setting can be reversed. Reference numeral 57a denotes a sensor for detecting whether or not the front door cover 53a is securely closed. In the control device, when the front door cover 53a is closed, the sensor 57a detects the closed state.

Instead of the two sensors 56a and 57a, one sensor 57a ′ indicated by a dotted line in FIG. This sensor is arranged so that it does not operate unless the unit 31 is contained and the front door cover 53a is closed. That is, the sensor 57a ′ is attached to the front door cover 53a, and detects that the sensor 57a ′ is in contact with a part of the unit and is closed when the door is closed. When the sensor 57 ′ is configured by a micro switch, for example, when the door is closed, it is determined that the sensor 57 ′ is closed by changing from on to off. Or conversely, it can also be set to determine that the closed state has been reached by changing from OFF to ON.
The same components as 52a to 57a (or 57a ′) are also provided on the storage space 50b side. The front door covers 53a and 53b are reverse in opening and closing directions.
The front door cover 53b is provided with a display device 58 provided so as to be confirmed obliquely from above. A warning or the like similar to that of the display unit on the main body side can be displayed as necessary.
The form of the opening / closing part is not limited to the double door system. Other methods such as a sliding door method may be used as long as the unit 31 can be easily taken in and out and a sealed space can be easily formed.

  According to the configuration as described above, the storage space can be substantially sealed, and the space can be kept almost airtight. Therefore, when the unit is not used for a predetermined time or more, it is immediately below it. By storing and storing in the storage space, it is possible to prevent the ink from evaporating and drying to some extent due to the effect of the sealed space, and it is possible to prevent clogging of the plate cylinder due to ink drying when left. Therefore, it is possible to use fixing-improving inks that are very effective in drying and fixing printed images in stencil printing, and use inexpensive stencil printing inks that are similar to conventional ones without using special inks such as ultraviolet curable inks. While being used, it is possible to obtain a printed image that has good drying characteristics and is completely fixed with time.

FIG. 4 is a diagram showing a display device provided on the front door cover of the dedicated table.
It has two yellow lighting lamps 59a and 59b, two red lighting lamps 60a and 60b, and a liquid crystal display unit 61. For example, the sensor 56a detects that the unit 31 is stored in the left storage space 50a. If the sensor 57a detects that the front door cover 53a is securely closed, the yellow lighting lamp 59a on the left side is turned on when a first predetermined time, for example, one week has elapsed, as a result of measuring the elapsed time therefrom. At the same time, the liquid crystal display unit 61 displays “Please extract the left drum unit and execute the cleaning mode with the printer”. If this operation is still not performed, the right red lamp 60a is turned on at the time when a second predetermined time, for example, two weeks has passed from the beginning, and the liquid crystal display unit 61 “extracts the right drum unit”. “If the printer does not perform the cleaning mode, the ink will solidify.” Is displayed. The same applies to the right storage space 50b, and the yellow lighting lamp 59b or the red lighting lamp 60b is turned on.
The first and second predetermined times may be set to specific values depending on the characteristics of the ink used and the airtightness of the storage space.

If there is only one storage space, the warning message when the unit is stored in the dedicated table and cannot be removed after a predetermined time has passed is “The storage space dedicated to the print drum is stored in the dedicated table. The display may indicate that the unit is taken out and mounted in the main body of the printing apparatus, and after executing the print drum cleaning mode, the unit is again stored in the print drum dedicated storage space of the dedicated table. Accordingly, even when a warning is displayed, it is possible to prevent the plate-carrying ink from drying and adhering and causing a serious problem when the unit is removed and remounted as it is.
When the unit is extracted and the cleaning mode is performed by the printing apparatus, the unit can be stored again by storing it in the storage space 50a or 50b without performing printing operation using the unit, and the time is measured again from there. Will be started.
If the unit is not cleaned even after the second predetermined time has passed and the unit is not cleaned, the operation of the plate making / printing key of the printing apparatus main body is prohibited and the above display is repeated. Before starting the next printing, it is preferable to clean the corresponding unit.

  According to the above configuration, when it is detected that the unit is not taken out after a predetermined time, that is, when both the detection sensor 56a and the detection sensor 57a are in an operating state, how is the sealed space? In other words, if the unit is left for a long period of time, the plate cylinder will become clogged due to the high viscosity of the ink stored in the plate cylinder. If it is not used for a predetermined time, it will be detected and a warning will be displayed to the operator. By doing so, it is possible to prevent troubles such as forgetting the operation and fixing the ink.

FIG. 5 is a diagram showing an operation display unit of the stencil printing apparatus.
Also here, it has a yellow lighting lamp 63, a red lighting lamp 64 and a liquid crystal display section 65. Even if the specific unit 31 is mounted on the stencil printing apparatus 1 and predetermined printing is performed, the unit 31 is When the unit mounting detection sensor 66 (not shown) detects that the unit is not taken out, the liquid crystal display unit 65 immediately displays “Please extract the drum unit and store it in the dedicated table”. Of course, when the unit attachment detection sensor 66 detects that the drum unit has been removed, the display is immediately turned off.
When using ink with improved fixing performance, a warning message is displayed so that the drum unit must be stored in a dedicated table whenever a print job is completed. It is possible to prevent the occurrence of troubles such as leaving the period for a period and causing clogging of the plate cylinder due to high viscosity of the ink retained in the plate cylinder or fixing the ink.

  An elapsed time from the end of printing is measured by a timing device of the control device 67 of the stencil printing apparatus 1 (not shown), and it is detected that the drum unit is not removed even if, for example, 15 minutes elapses as the third predetermined time. Is detected, the yellow lighting lamp 63 as a warning indicator lamp is lit, and the display of “Please extract the drum unit and store it in the dedicated table” is continued on the liquid crystal display section 65. In order to call attention, the yellow lighting lamp 63 may be blinked, or the liquid crystal display may be blinked. Of course, this warning display is cleared when the next printing operation or plate making operation is carried out with the same unit mounted within 15 minutes.

If, for example, 24 hours have passed as the fourth predetermined time after the end of the last printing operation, the control device 67 prohibits the plate making operation or printing operation of the stencil printing machine, and starts plate making. When the key 68 or the print start key 69 is pressed, the yellow lamp 63 is lit and the liquid crystal display unit 65 displays that “plate making / printing operations can be performed only after the cleaning mode is performed”. The control device 67 controls the operation and display as such. When the specified time has passed, the printing drum cleaning mode must be executed before the next plate making or printing operation can be started. Reduces the burden on the operator by eliminating the need for special operations.However, if there is a time interval and it is difficult to produce an image from the beginning, it is necessary to perform the plate-making and printing without cleaning. By preventing this, it is possible to prevent the occurrence of clogging of the plate cylinder and continue to use it without causing any trouble.
The operation display unit 62 is provided with a cleaning mode key 70, and performs a preset cleaning operation. By executing this operation, the control device 67 cancels the prohibition of the plate making or printing operation and permits the operation of the plate making start key and the like. As a result, the plate making start key 68 becomes operable, and at the same time, the elapsed data is cleared and measurement starts again from zero.

If the cleaning operation is still not performed, the red lighting lamp 64 is turned on from the time point when 24 hours have elapsed, and the message “please perform the cleaning mode” is continuously displayed on the liquid crystal display unit 65. Further, for example, when the 48th hour has elapsed as the fifth predetermined time, the control device 67 of the stencil printing apparatus 1 controls the operation so as to automatically perform the preset cleaning operation as long as power is supplied. To do.
If it is forgotten to remove the unit and execute the drum cleaning mode even if there is a warning display, the machine automatically executes the drum cleaning mode, so that the ink held in the plate cylinder can be left for a long period of time. It is possible to prevent the occurrence of serious troubles due to dry adhesion.
The first, second and third predetermined times may be determined in accordance with the characteristics of the ink used.

Next, the operation in the cleaning mode will be described.
First, the used base paper is peeled off from the plate cylinder of the installed unit, transported to the discharge plate section, and compressed and stored therein. Next, unprinted base paper that is not subjected to the plate making operation is transported and fed to the plate cylinder of the unit and wound around the outer periphery thereof. After that, the press of the press roller is turned on while rotating the cylindrical plate cylinder by a predetermined rotation, so that the ink is forced to pass through the hole of the cylindrical metal body 41 constituting the plate cylinder and the mesh screen 42. Then, an operation of supplying a sufficient amount of ink toward the inner surface of the unmade base paper is performed. Thereafter, the unstenciled base paper is peeled off from the plate cylinder, conveyed to the discharging unit, and compressed and stored. Then, the unprinted base paper that is not subjected to the plate making operation is again conveyed to the plate cylinder of the unit, fed, and wound around the outer periphery thereof. The operation of the cleaning mode is to make the plate cylinder difficult to be clogged by discharging the plate clogged ink which is easily clogged together with the base paper and discharging it.

FIG. 6 is a block diagram relating to operation control and display of the stencil printing apparatus and the dedicated table.
In the above embodiment, the dedicated table has the control device 72 provided with a timing device, and the dedicated table display device 58 further displays a warning when the drum unit is not taken out while being stored in the dedicated table for a predetermined time or longer. However, the dedicated table does not have the special control device 72 and the display device 58, and the control is performed by the control device 67 of the stencil printing apparatus, and the display is displayed on the operation panel of the stencil printing apparatus. It can also be used. For this purpose, it is necessary to electrically connect the printing apparatus main body and the dedicated table by an arbitrary method so that necessary information can be exchanged. As a result, the information of the drum unit storage detection sensors 56a and 56b and the door cover open / close detection sensors 57a and 57b is directly processed by the control device 67 of the stencil printing apparatus.

  According to this configuration, when the control device 67 of the stencil printing apparatus main body determines that the unit is not removed after a predetermined time has elapsed after being installed and stored, a warning is displayed on the display unit of the stencil printing apparatus. Since the display is made, the dedicated table does not require a display device, and the price can be reduced, and the display of the stencil printing device that is always checked at the time of operation, rather than the display device in the lower and hard-to-see place for the operator Since the warning sign is seen at the part, the warning sign is overlooked and the unit is left unattended for a long period of time. Occurrence of troubles such as sticking can be prevented in advance.

7a to 7c are flowcharts of the control device of the stencil printing apparatus.
The flowchart shows a series of three flows. In the figure, the reference numerals surrounded by a square frame indicate that the same reference numerals are connected to each other.
All the predetermined times shown in the figure are shown as an example.

A supplementary description will be given of the fixing property improving ink used in the printing apparatus of the present invention.
Conventionally, a water-in-oil emulsion ink has been used as an ink for a digital stencil printing apparatus, but usually does not contain a resin having a property of curing at room temperature. However, as a method for improving the drying fixability, a method such as adding an alkyd resin or rosin-modified phenol to the oil phase component or a method of adding various water-soluble resins or resin emulsion latex to the water phase component is adopted. it can. However, if such resin is added, clogging will occur if left in the plate cylinder.

  When the warning is displayed when the unit is stored in the dedicated table and it is not removed after a predetermined time, the control unit has taken out the unit stored in the dedicated table within the predetermined time. If the drum unit is installed in the stencil printing device within a predetermined time and the cleaning mode key is pressed, and it is detected that the drum unit is removed and stored again in the dedicated table after the cleaning mode is completed, Alternatively, when the plate making operation is performed with the same drum after the cleaning mode ends, it is determined that the operation has been normally performed.

1 is an overall schematic diagram of a stencil plate-making printing apparatus and a dedicated table according to an embodiment of the present invention. It is a figure which shows the printing drum of this invention. It is the figure of the cross section which looked at the exclusive table from the top. It is a figure which shows the display apparatus provided in the front door cover of the exclusive table. It is a figure which shows the operation display part of a stencil printing apparatus. It is a block diagram regarding operation control and display of a stencil printing apparatus and a dedicated table. It is the flowchart 1 of the control apparatus of a stencil printing apparatus. It is the flowchart 2 of the control apparatus of a stencil printing apparatus. It is the flowchart 3 of the control apparatus of a stencil printing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil plate making printing apparatus 2 Dedicated table 10 Printing drum 31 Printing drum unit 38 Rail-shaped member 39 Fixed guide rail 50 Printing drum exclusive storage space 51 Fixed guide rail 59, 63 Yellow lighting lamp 60, 64 Red lighting lamp 61, 65 Liquid crystal Display section

Claims (8)

  A stencil printing apparatus with a dedicated table for mounting a stencil printing apparatus, wherein the dedicated table stores a printing drum storage space (hereinafter simply referred to as a storage space) in which a printing drum unit (hereinafter simply referred to as a unit) removed from the stencil printing apparatus can be stored. ), And the storage space has an opening / closing part that allows the unit to be taken in and out, and when the opening / closing part is closed, the storage space is kept airtight and substantially forms a sealed space, At least one sensor for detecting that the unit is stored in the storage space and the opening / closing unit is in a closed state, and the stencil printing apparatus displays a warning, A control device including a device, wherein the control device is configured such that the unit is stored in the storage space and the opening / closing portion is in a closed state. Time is measured from the time point, and when the sensor is still operating even after a predetermined first predetermined time has passed, a display informing the danger of ink solidification on the display section, or to prevent ink solidification A stencil printing apparatus with a dedicated table, characterized in that a display for instructing the work is performed.   2. The stencil printing apparatus with a dedicated table according to claim 1, wherein the display takes out the unit stored in the storage space, attaches the unit to the printing apparatus main body, executes a printing drum cleaning mode, and then returns to the storage space. A stencil printing apparatus with a dedicated table, which is a display instructing to be stored in   3. The stencil printing apparatus with a dedicated table according to claim 2, wherein when the display is performed, the next plate making or printing operation is permitted as it is within a predetermined second predetermined time, 2. A stencil printing apparatus with a dedicated table, wherein when the printing drum cleaning mode is executed when the predetermined time of 2 is exceeded, the next plate making or printing operation is permitted.   The stencil printing apparatus with a dedicated table according to any one of claims 1 to 3, wherein the control device is configured to extract the drum unit from the display unit and store it in the dedicated table after the unit has completed the printing process. A stencil printing apparatus with a dedicated table, characterized in that a display prompting the user is performed.   5. The stencil printing apparatus with a dedicated table according to claim 4, wherein the control device continues to be attached to the printing apparatus main body even after the third predetermined time elapses after the unit has finished the printing process. A stencil printing apparatus with a dedicated table that displays a warning and displays the same on the liquid crystal display again.   6. The stencil printing apparatus with a dedicated table according to claim 4 or 5, wherein the control device is continuously attached to the printing apparatus main body even after a predetermined fourth predetermined time has elapsed after the unit has completed the printing process. When it is determined that the stencil is left as it is, the stencil printing apparatus with a dedicated table is displayed on the display unit so as to perform cleaning, and the next plate making or printing is prohibited until the cleaning is completed.   The stencil printing apparatus with a dedicated table according to any one of claims 4 to 6, wherein the control device continues even after a predetermined fifth predetermined time has elapsed after the unit has completed the printing process. A stencil printing apparatus with a dedicated table, wherein the drum cleaning mode is automatically executed when it is determined that the printer remains attached to the printing apparatus main body.   The stencil printing apparatus with a dedicated table according to any one of claims 1 to 7, wherein the dedicated table includes a control device including a timing device, and a display device, and the display device includes the printing device. A stencil printing apparatus with a dedicated table, which performs display similar to the content displayed on the display unit of the main body.

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