JP2001226045A - Printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate problems that a user must arrange surface printed sheets and slip sheets by separating these sheets one by one from each other, that the hands of the user are stained with the ink of printed images caused by manual separation of slip sheets and sheet arrangement, and that surface print stain occurs in double-surface printing. SOLUTION: After performing a series of controls, a controller 200 feeds again a front and rear surface printed sheet Pb having a slip sheet PA provided between the front and rear surfaces thereof. After a sheet feed motor 60-3 is controlled so that the sheet feed means of a re-sheet feed part 9 is operated, a slip sheet separating claw 111 is operated so as to control a separating claw driving motor 115 to deliver the front and rear surface printed sheet Pb alternately in a printing sheet delivery direction B and the slip sheet PA in a slip sheet delivery direction C. When the front and rear surface printed sheet Pb is fed to a sheet delivery tray 71, a displacement solenoid 90 is controlled to be off so as to bring a displacement means 87 into non-operative condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a printing apparatus, and more particularly, to a printing apparatus including a stencil printing apparatus for printing on the front surface or both sides of printing paper.

[0002]

2. Description of the Related Art As a stencil printing apparatus capable of printing on both sides of a printing paper, there is known a stencil printing apparatus described in, for example, JP-A-7-81202. In the stencil printing apparatus described in the above publication, the printing unit prints on one surface of the printing paper fed from the paper supply unit, and then prints the sheet again (the second publication in the publication).
The front and back sides of the front side printed paper fed from the feeding section are reversed and conveyed to the printing section again through the reversing conveyance means, and the other side of the printing sheet is also printed on the back side. This technology is to be printed (hereinafter, this technology is referred to as “the former technology”).

On the other hand, as a paper feeding device connected to or built in the main body side of the stencil printing apparatus as described above, a nip portion formed between a printing drum, also called a plate cylinder, and a press roller is used. Also, there are printers that include a registration roller that feeds the leading edge of printing paper at a predetermined timing toward holding means of the impression cylinder, and a plurality of paper feeding units that feed paper toward the registration roller. As one of the plurality of paper feeding units, there is an auxiliary paper feeding unit provided on the main body side, and a bank paper feeding unit provided separately from the auxiliary paper feeding unit. There is something consisting of. The bank paper feeding section is usually provided below the main body for the purpose of setting a document and improving the operability of the apparatus.
Examples of the bank paper feeding section include, for example, Japanese Patent Application Laid-Open Nos. 5-124737 and 5-221536 in a copying machine.
JP-A-6-144600 and JP-A-7-137
No. 851 is disclosed in Japanese Patent Application Laid-Open No.
137 and JP-A-7-144402. In most of the sheet feeding apparatuses having a bank sheet feeding section, an operator or the like can pull out and push in a sheet feeding tray in a position facing the front of the apparatus to perform operations such as replenishment of printing paper. Method is used. Further, in printing apparatuses such as stencil printing apparatuses, various kinds of printing papers are used. Printing paper is generally classified into thin paper, standard paper (plain paper), and thick paper. Thin paper includes reprinted paper and high-quality 45 kg paper, and standard paper includes copy paper, medium paper, and high-quality 55 kg paper. There are recycled paper and stencil high-quality paper. As thick paper, drawing paper, postcards, envelopes, high-quality 135kg paper,
There are high quality 180kg paper and the like.

As described above, in addition to the press roller, the pressing means for pressing the printing paper against the plate-making master on the printing drum is supplied for the purpose of improving the registration accuracy of the paper and reducing noise. An impression cylinder or the like having substantially the same diameter as the outer diameter of the printing drum provided with holding means for holding the leading end of the incoming printing paper is also used. In addition, some stencil printing machines that are not integrated with stencil making and printing have a stencil making section that obtains image information of a document and performs stencil making operation by connecting with a personal computer or an external storage device. Or, in the paper discharge section, the tip of the peeling claw swings by obtaining the same printing drum rotation driving force in synchronization with the rotation of the printing drum, so that the leading end of the printed printing paper can be freely moved. Some stencil printers are equipped with a document reading unit and a paper discharge unit with a driving unit that is driven independently of the printing drum because some stencil printers have only a simple paper discharging and peeling unit. is not.

In most stencil printing apparatuses at present, a single-sided printing method for printing on only one of the front and back surfaces of the printing paper, a double-sided printing method, a double-sided simultaneous printing method, and a difference in pressing means are used. Instead, in order to fill the plate-making master or unplated master on the printing drum with ink mainly from the inner circumference side of the printing drum and bring the master into close contact with the outer peripheral surface of the printing drum, a regular A so-called “printing printing” operation, which is a printing operation different from printing, is performed. In addition, in order to check a print image such as print image density and image sharpness and / or to check at least one of upper, lower, left and right margins, the printing operation including printing immediately after printing is referred to as “test printing”. A printing operation different from regular printing performed at any time during the printing is also performed. In plate printing, usually, only one sheet of printing paper is fed and printing is performed at a low speed. The printed material obtained by plate printing or test printing is not treated as a regular printed material, and is not printed. The number-of-prints counter of the apparatus is not operated. However, when the ink is not sufficiently filled and replenished to the master, such as when the stencil printing machine has been left for a long period of time, at low temperatures, or when performing stencil making and printing many times in succession, the printed image rises poorly. In some cases, a cumbersome operation such as one more printing operation is required (hereinafter, such a technique is referred to as "the latter technique").

[0006]

However, in the former technique, when the surface of the printing paper is printed, the ink that has transferred to the surface of the printing paper penetrates into the printing paper and does not stain when rubbed with a finger or the like. Since it takes a certain amount of time to reach the so-called set state, the ink on the front side printed paper that has been discharged and stacked on the paper output tray first In some cases, a problem called “set-off” in which contact occurs and transfer occurs. This set-off does not cause a serious problem in normal printing in which printing is performed only on the surface of the printing paper, but becomes a serious problem in double-sided printing or postcard printing.

Further, if the ink on the surface-printed sheet is fed from the re-feeding section to the printing section before the ink is sufficiently set, the conveying rollers and guide plates disposed in the conveying section in the middle of the feeding are moved. It may be stained with ink.

Further, when the front and back side printed sheets (hereinafter sometimes simply referred to as “front and back side printed sheets”) printed on the front and back sides of the printing paper are discharged and stacked on the paper output tray, `` Surface printing stains '' in which the ink on the back side of the front and back side printed paper ejected and stacked on the paper ejection tray first comes into contact with the front side of the front and back side printed paper discharged and stacked next and transfers There is also a case where a so-called defect occurs.

As a measure for preventing set-off, the applicant of the present invention disclosed in Japanese Patent Application Laid-Open No. Hei 7-144402, for example, which prevents set-off of printing paper without lowering the efficiency of the printing operation and without increasing the cost. At the same time, he proposed a technique relating to a printing apparatus capable of sorting paper. But,
According to the technology described in Japanese Patent Application Laid-Open No. H07-144402, although set-off can be prevented during printing on the front side of the printing paper, the slip sheet discharged to the paper output tray before and after the front side printing paper remains as it is. For this reason, it is troublesome that the user, etc. must separate and re-align the front-printed paper and the interleaving paper each time, or use such a troublesome interleaving paper separation / paper alignment operation manually. There is a problem that the hands of the user are stained with the ink of the printed image. In addition, there has not been a full-scale technical proposal, including the technology described in the above-mentioned Japanese Patent Application Laid-Open No. 7-81220, capable of preventing surface printing stains during double-sided printing.

On the other hand, in the latter technique, for example,
In the case of performing stencil printing using a conventional stencil printing apparatus or the like having a plurality of paper feeding units including a bank paper feeding unit, including the technology described in Japanese Patent No. 144402, The required number of print sheets to be printed has been fed from the paper feeder selected from the plurality of paper feeders.
Therefore, when focusing on the purpose of the above-described printing and printing, the use of expensive printing paper with excessive quality as the printing paper as described above is a waste of printing paper. Become. In particular, when the type of paper to be printed is thick paper such as a postcard or an envelope, the cost is higher than that of the above-described thin paper or standard paper, and the waste is further increased. Even when a test print is performed by a printing apparatus having a plurality of paper feed units including a bank paper feed unit, a selected one of the plurality of paper feed units is used as test print paper to be used for the test print. Since the printing paper to be printed is fed from the copy unit, it has the same problem as described above.

Accordingly, the present invention has been made in view of such circumstances, and can suppress and prevent the occurrence of set-off, contamination of a transporting unit, and surface printing stain, and a troublesome operation of separating and aligning slip sheets. Paper and printed paper (front and back side printed paper) are automatically separated from the interleaving paper without the user's hands being stained with the ink of the printed image due to this troublesome operation. A first object is to provide a new printing device which is excellent in operability and high in convenience. In addition, in a case where plate printing, test printing, or normal printing is performed by a printing apparatus having a plurality of paper feeders (paper feeder and interleaf paper feeder), initial printing suitable for the purpose of the printing is performed. By feeding the required number of sheets of printing paper from an interleaf paper feeder separate from the paper feeder,
It is a second object to provide a printing apparatus that does not waste printing paper.

[0012]

Means for Solving the Problems In order to solve the above-mentioned problems and to achieve the above-mentioned object, the invention described in each claim has the following characteristic structure. According to a first aspect of the present invention, there is provided a printing drum on which a master is wound and which is rotatable, a first position for pressing a printing sheet against the master on the printing drum, and a second position distant from the first position. Pressing means that can be displaced between the first and second positions, displacing means for displacing the pressing means between a first position and a second position,
A sheet feeding device for feeding the printing paper, a slip sheet feeding device for feeding a slip sheet between printed sheets, and a sheet discharge tray for stacking the printed sheets and the discharged slip sheet. In a printing apparatus capable of performing an operation related to a slip sheet mode for inserting the slip sheet between the printed sheets, the printing apparatus is configured to set the sheet feeding mode when performing printing in the slip sheet mode. Operation control means for activating the displacement means with respect to the printing paper fed by the apparatus, and deactivating the displacement means with respect to the slip sheet fed by the slip sheet feeding device; A re-feeding device capable of feeding the printed paper and the interleaf loaded on the discharge tray, and a printing paper discharging direction for feeding the printed paper fed from the re-feeding device. The interleaving paper fed from the re-feeding device, And having a slip sheet separating means which can each be separated and discharged.

According to a second aspect of the present invention, in the printing apparatus according to the first aspect, it is possible to perform an operation relating to a double-sided printing mode for printing on the front and back surfaces of the printing paper, and Means for discharging the front-surface printed paper and the interleaf fed by the re-feeding device in the print paper discharge direction, and the front-printed paper discharged in the print paper discharge direction by the interleaf separation means. Reversing and transporting means for reversing and transporting the front side printed paper and the interleaving paper so that the respective back sides of the paper and the interleaving paper face the printing drum; and When the front-surface printed paper is conveyed toward the paper output tray by the conveyance unit, the displacement unit is operated to print on the back surface of the front-surface printed paper, and the slip sheet is discharged. When it is conveyed towards the base,
The displacing means is deactivated, and thereafter, the re-feeding device is used to re-feed the front and back side printed sheets interposed with the interleaving sheet, and the interleaving sheet separating means is used to perform the interleaving operation. And a control unit for alternately discharging the back side printed paper in the printing paper discharging direction and the interleaving paper in the interleaving paper discharging direction.

According to a third aspect of the present invention, in the printing apparatus according to the first aspect, it is possible to perform an operation related to a double-sided printing mode for printing on the front and back surfaces of the printing paper, and Means for feeding the front side printed paper fed by the re-feeding device in the printing paper discharge direction,
The interleaving paper is alternately separated and discharged in the interleaving paper discharge direction, and the back surface of the front printed sheet discharged in the printing paper discharge direction by the interleaving paper separating unit is opposed to the printing drum. Reversing and conveying means for reversing and conveying the front side printed sheet; and setting the double-sided printing mode, wherein when the reversing and conveying means conveys the front side printed sheet toward the paper output tray, And control means for operating the displacement means for printing on the back side of the printed paper.

According to a fourth aspect of the present invention, in the printing apparatus according to the third aspect, the printing apparatus further includes plate making means for forming a plate by forming a perforation in the master, and when the double-sided printing mode is set, the plate making means: The perforation diameter of the master used when printing on the back side of the front side printed paper is smaller than the perforation diameter of the master used when printing on the front side of the printing paper.

According to a fifth aspect of the present invention, there is provided the printing apparatus according to the third aspect, further comprising plate making means for forming a plate by forming a perforation in the master, and wherein the plate making means sets the double-sided printing mode for printing. The diameter of the perforations of each master used when performing the printing is smaller than the diameter of the perforations of the master used when printing only one of the front side and the back side of the printing paper.

According to a sixth aspect of the present invention, in the printing apparatus according to the third aspect, the double-sided printing mode is set, and the front-side printed paper fed in the printing paper discharge direction by the re-feeding device. When printing on the back side of the drum, at a predetermined interval during rotation of the printing drum, the drum re-feeding device does not feed the front-printed sheet, and causes the displacement means to be inoperative. It is characterized by having intermittent sheet feeding control means.

According to a seventh aspect of the present invention, there is provided the printing apparatus according to the third aspect, wherein the printing is performed on the front side and the back side of the printing paper by setting the double-sided printing mode. When printing on the surface of the fed printing paper, at a predetermined interval during rotation of the printing drum, without feeding the printing paper by the paper feeding device,
And, when the displacing means is deactivated and printing is performed on the back side of the front-printed sheet fed by the re-feeding device, the re-feeding is performed at a predetermined interval during rotation of the printing drum. The apparatus is characterized in that the apparatus further comprises a drum idle rotation intermittent paper feed control means for causing the apparatus to not feed the front side printed paper and deactivating the displacement means.

According to an eighth aspect of the present invention, in the printing apparatus according to the first aspect, the interleaving paper separating means removes the front-printed paper fed by the re-feeding device in the printing paper discharging direction. The interleaving paper is alternately discharged in the interleaving paper discharge direction, and the front side printing is performed such that the back side of the front side printed paper discharged in the printing paper discharging direction by the interleaving sheet separating unit faces the printing drum. Reversing conveyance means for reversing and conveying the finished paper, and when the reversing conveyance means conveys the front-printed paper toward the paper discharge tray, the displacement is performed so that printing is not performed on the back surface of the front-printed paper. Control means for deactivating the means.

According to the ninth aspect of the present invention, there are provided the second to eighth aspects.
In the printing apparatus according to any one of the above, it is possible to perform an operation related to a sorting mode for sorting the printed paper for every predetermined number of sheets, and when the sorting mode is set, Is characterized in that the slip sheet is discharged in the printing sheet discharge direction every predetermined number of the printed sheets.

According to a tenth aspect of the present invention, in the printing apparatus according to the ninth aspect, the interleaving paper is a colored paper.

According to an eleventh aspect of the present invention, a rotatable printing drum around which a master is wound, a first position at which printing paper is pressed against the master on the printing drum, and a second position distant from the first position. A pressing unit that can be displaced between the first position and a second position, a displacing unit that displaces the pressing unit between a first position and a second position, and a sheet feeding device that feeds the printing paper; A slip sheet feeder that feeds slip sheets between printed sheets,
A paper output tray for loading the printed paper and the discharged interleaf, and as an operation relating to a paper interleaving mode for inserting the interleaf between the printed paper and the paper for initial printing, In a printing apparatus capable of performing operations related to the initial print mode using a predetermined number of slip sheets, when the initial print mode is set and printing is performed, the printing sheet is fed by the slip sheet feeding device. Operating the displacing means with respect to the interleaving paper for initial printing, setting the interleaving mode and performing printing, the displacing means with respect to the printing paper fed by the paper feeding device. , And operation control means for disabling the displacement means for the slip sheet fed from the slip sheet feeding device,
A paper re-feeding device capable of feeding the printed paper and the interleaf loaded on the paper discharge tray, and the printed paper fed from the paper re-feeding device in a print paper discharging direction. And an interleaf separation means capable of separating and discharging the interleaf in the interleaf discharge direction, respectively.

According to a twelfth aspect of the present invention, in the printing apparatus according to the eleventh aspect, it is possible to perform an operation related to a two-sided printing mode for printing on the front and back surfaces of the printing paper, Is set, the interleaf paper feeder is caused to feed a predetermined number of the interleaf sheets to the uppermost portion of the paper discharge tray in the refeeder, and the initial paper fed by the refeeder is set. Control means for operating the displacing means with respect to the interleaving paper for printing, wherein the predetermined number of the interleaving paper is used as the initial printing paper when printing on the back side of the front side printed paper. Features.

According to a thirteenth aspect of the present invention, in the printing apparatus according to the eleventh or twelfth aspect, the paper for initial printing includes printing paper or test printing paper, and the printing paper includes The test printing paper includes the printing paper and confirms the print image and / or at least one of the top, bottom, left, and right margins. It is made of paper or the like that can be checked.

According to a fourteenth aspect of the present invention, there is provided a printing drum on which a master is wound and which is rotatable, pressing means for pressing a printing sheet against the master on the printing drum, and plate making means for making a plate by forming a hole in the master. And a paper feeding device for feeding the printing paper, wherein the plate making means is capable of performing an operation related to a double-sided printing mode for printing on the front and back surfaces of the printing paper. The perforated diameter of each master used when performing printing by setting the duplex printing mode is smaller than the perforated diameter of the master used when printing only one of the front and back surfaces of the printing paper. Features.

Here, in response to the invention described in claim 11,
The following technical configuration can be adopted under the concept of a stepwise configuration similar to the inventions of claims 2 to 10 and 13. That is, according to the first technical configuration, in the printing apparatus according to claim 11, it is possible to perform an operation related to a double-sided printing mode for printing on the front surface and the back surface of the printing paper. Ejecting the front-side printed paper and the interleaf fed by the refeeder in the print paper discharge direction, and setting the duplex printing mode, the interleaf paper feeder operates the Control means for feeding a predetermined number of the interleaving paper for the initial printing to the uppermost part of the paper discharge tray in the paper feeding device, the interleaving paper for the initial printing fed by the re-feeding device, and the interleaving paper Reverse transport for reversing and transporting the front side printed paper and the interleaving paper such that the back side of the front side printed paper and the interleaving paper discharged in the printing paper discharging direction by the separating unit are opposed to the printing drum. And a stage, wherein,
When the duplex printing mode is set, and when the interleaf paper for initial printing and the front-face printed paper conveyed by the reverse conveying means are conveyed toward the paper ejection tray, the initial printing Operating the displacing means to print on the back side of the interleaf and the front side printed paper, deactivate the displacing means when the interleaving paper is conveyed toward the discharge tray, and thereafter, The refeeding device causes the front and back side printed sheets interposed with the interleaving paper to be fed again, and performs the interleaving sheet separating means to move the front and back side printed sheets in the printing paper discharging direction. The interleaving paper is discharged alternately in the interleaving paper discharging direction.

According to a second technical configuration, in the printing apparatus according to the eleventh aspect, it is possible to perform an operation related to a double-sided printing mode for printing on the front surface and the back surface of the printing paper. Sets the double-sided printing mode by alternately separating and discharging the front side printed paper fed by the re-feeding device in the printing paper discharging direction and the interleaving paper in the interleaving paper discharging direction, respectively. Control means for causing the slip sheet feeding device to feed a predetermined number of slip sheets for the initial printing to the uppermost portion of the sheet discharge tray in the refeeding device; and feeding by the refeeding device. The front-printed paper is reversed and conveyed so that the back side of the front-printed paper discharged in the print paper discharge direction by the interleaving paper for initial printing and the rear surface of the front-printed paper discharged in the print paper discharge direction is opposed to the printing drum. Anti Transport means, and the control means, when the double-sided printing mode is set, the interleaving paper for initial printing and the front-side printed paper are directed toward the paper discharge table by the reverse transport means. When the sheet is conveyed, the displacing means is operated to print on the back side of the slip sheet for the initial printing and the back side of the front side printed sheet.

According to a third technical configuration, in the printing apparatus according to the second technical configuration, there is provided plate making means for forming a plate by forming a perforation in the master, and when the double-sided printing mode is set, the plate making means The master used when printing on the front side of the interleaving paper for initial printing and the front side of the printing paper, the perforation diameter of the master used when printing on the back side of the interleaving paper for initial printing and the front side printed paper. Characterized in that it is smaller than the diameter of the perforations.

According to a fourth technical configuration, in the printing apparatus according to the second technical configuration, there is provided plate making means for forming a perforation in the master to make a plate, and the plate making means sets the double-sided printing mode. The perforation diameter of each master used when performing printing is made smaller than the perforation diameter of the master used when printing only one of the front and back surfaces of the interleaving paper for the initial printing and the printing paper. And

According to a fifth technical configuration, in the printing apparatus according to the second technical configuration, the duplex printing mode is set, and the front-side printed sheet fed in the print sheet discharge direction by the re-feeding device is provided. When printing on the reverse side of a sheet, a drum which causes the re-feeding device to not feed the front-printed sheet, and deactivates the displacement means at predetermined intervals during rotation of the printing drum. It is characterized by having idle intermittent paper feed control means.

A sixth technical configuration is the printing device according to the second technical configuration, wherein the duplex printing mode is set and printing is performed on the front and back sides of the printing paper.
When printing on the surface of the printing paper fed by the paper feeding device, at a predetermined interval during the rotation of the printing drum, the paper feeding device to feed the printing paper, and, When the displacing unit is deactivated and printing is performed on the back side of the front-side printed sheet fed by the re-feeding device, the re-feeding device is moved at a predetermined interval during rotation of the printing drum. And a drum idle rotation intermittent paper feed control means for preventing the surface-printed paper from being fed and for disabling the displacement means.

According to a seventh technical configuration, in the printing apparatus according to claim 11, the interleaving paper separating unit is configured to remove the front-printed paper fed by the re-feeding device in the printing paper discharging direction and to form the printing paper. The paper is alternately discharged in the slip-sheet discharge direction, and the front-printed paper is discharged so that the back side of the front-printed paper discharged in the print-paper discharge direction by the slip-sheet separating means faces the printing drum. Reversing transport means for reversing and transporting the paper, and the displacing means so as not to print on the back side of the front-face printed paper when the reverse-printed transport means transports the front-printed paper toward the discharge tray. And control means for disabling.

According to an eighth technical configuration, in the printing apparatus according to any one of the first technical configuration to the seventh technical configuration, an operation relating to a sorting mode for sorting the printed sheets into a predetermined number of sheets is provided. When the sorting mode is set, the interleaving sheet separating unit discharges the interleaving paper in the printing paper discharging direction for each of the predetermined number of the printed papers. . According to a ninth technical configuration, in the printing device according to the eighth technical configuration, the interleaving paper is a colored paper. According to a tenth technical configuration, in the printing device according to any one of the first to ninth technical configurations, the paper for the initial printing includes printing paper, test printing paper, and the like, The printing paper is made of waste paper or paper that is inexpensive compared to the printing paper, and the test printing paper includes the printing paper, and is used for checking a print image and / or at least for top, bottom, left and right margins. It is characterized by being made of paper or the like on which one of the above can be confirmed.

[0034] In the inventions described in claims 1 and 11 and the first technical configuration, etc., "the first position for pressing the printing paper against the master on the printing drum and the second position distant from the first position" The "pressing means that can be displaced between" includes a pressure roller having a diameter substantially equal to the outer diameter of the printing drum, in addition to a press roller used in an embodiment to be described later. When the impression cylinder is used, printing is performed by pressing the impression cylinder relatively to the printing drum, and an impression cylinder contact / separation method in which printing is performed by pressing the impression cylinder against the printing drum; There are a printing drum contact / separation system in which printing is performed by pressing a printing drum against a cylinder, and a combination system thereof. Specific examples of the impression cylinder contact / separation method include those shown in FIGS. 1 to 5 and the like of JP-A-9-216448. As the printing drum contact / separation method, there is a well-known printing drum moving to the impression cylinder side (including a type in which an ink roller inside the printing drum projects to the impression cylinder side) to perform printing.

In the inventions according to the eleventh to thirteenth aspects, the term "initial printing" or "operation relating to the initial printing mode" means that a master on a printing drum or a master on an unprinted plate is filled with ink and the master is filled with ink. In addition to regular printing, this includes `` printing printing '', which is a printing operation performed immediately after plate-making, in order to make the image adhere to the outer peripheral surface of the printing drum. // At least one of the top, bottom, left and right margins, a “test print” operation that is performed as needed immediately after plate making, or a print image different from the above-described printing and test print operations. It also includes a “normal printing” operation, which is an operation at the time of initial printing at the start. Further, in the invention according to claim 13, the "plated paper" refers to the first or several sheets supplied first for use in "plated printing". The “test print sheet” refers to a sheet that is used for “test print” and is supplied as needed. In this way, the paper that has been initially printed, including “printing paper” and “test printing paper” printed by “printing printing” and “test printing”, is usually printed on the printing paper to be printed. However, it is not treated as “regular printed matter” and is not counted as “regular printed matter”.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention including embodiments with reference to the drawings (hereinafter, simply referred to as "embodiments").
Will be described. In the embodiments and the like, members, components, and the like having the same function, shape, and the like are denoted by the same reference numerals, and description thereof will be omitted as much as possible. For the sake of simplicity of the drawings and description, members and components that do not need to be particularly described in the drawings, even if they are to be shown in the drawings, are omitted as appropriate. In the drawings, members and components which are configured as a pair and need not be specifically distinguished and described will be replaced with the description by appropriately describing one of them in order to simplify the description. (Embodiment 1) Hereinafter, a first embodiment of the present invention (hereinafter, referred to as a first embodiment)
(Embodiment 1) will be described. FIG.
1 shows the overall configuration of a stencil type stencil printing apparatus capable of performing double-sided printing to which Embodiment 1 of the present invention is applied. First, the overall configuration will be described.

In FIG. 1, reference numeral 1000 denotes a stencil type stencil printing apparatus capable of printing on both sides as an example of a printing apparatus.
Reference numeral 500 denotes a body section 500 as a main body of the plate making printing apparatus.
Are respectively shown. The stencil type stencil printing apparatus 1000 includes a document reading unit 1 that reads images on the front surfaces of documents A and B transferred from a document receiving table 1a disposed above the body unit 500.
A plate making unit 2 arranged on one side of the body unit 500 below the document reading unit 1 and perforating and making a heat-sensitive stencil master 21 (hereinafter simply referred to as "master 21") by a thermal head 23 as plate making means. The master 21 made by the plate making section 2 is conveyed and the printing drum 26 is conveyed.
The plate feeding unit 3 is wound around the original, the plate discharging unit 8 is disposed on the other side of the body unit 500 of the document reading unit 1, and separates and stores the used master 21 from the printing drum 26. A printing unit 10 that is arranged at the center and supplies ink from the inner peripheral side of the printing drum 26 to transfer ink from the perforated portion of the plate-making master 21 to the printing paper P; and a bank that is arranged below the machine unit 500 Between the printing paper feeding unit 43 and the printed paper P, which are respectively disposed in the paper feeding unit 36A serving as the main body of the feeding device and feed the printing paper P toward the printing unit 10. A bank paper feed unit 36 having an interleaf paper feed unit 44 as an interleaf paper feed device having a configuration function for feeding the interleaf paper PA, and a paper feed path disposed immediately before the printing unit 10; The printing paper P fed from the printing paper feeding unit 43 A pair of registration rollers 45a others for feeding at a predetermined timing to between slip sheet feeding unit 44 prints the fed interleaf sheet PA from the drum 26 and the press roller 28,
45b and the lower left of the body 500
The front-printed paper Pa and the interleaf paper PA printed by the printing unit 10 are fed to the first displacement position P1 to be discharged and stacked and the remaining back surface of the front-printed paper Pa for printing by the printing unit 10. The first discharge tray 61 having a discharge tray 61b that can be displaced between the second displacement position P2 and the first discharge tray 61 is moved from the first displacement position P1 to the second displacement position. A first paper discharge unit 6 having a paper discharge tray moving means 100 (shown in FIGS. 2 and 3) for selectively moving the paper P to a position P2, and a printing unit 1
And a first paper output tray 61 having a second paper output tray 71 provided with a paper output base 71b for discharging and stacking the front and back printed paper Pb printed at 0. Is the second
Occupies the displacement position P2, the front-printed paper Pa and the interleaf paper PA stacked on the first paper output tray 61 can be separated and fed to the printing unit 10 one by one. A sheet re-feeding unit 50, which is connected to a re-feeding unit 9 as a sheet feeding device and a printing unit 10 and is described later,
The printed paper fed from the re-feeding unit 9 and the printed paper fed from the re-feeding unit 9 are fed from the re-feeding unit 9 in the print paper discharging direction B, as shown in FIG. An interleaf separation claw 1 as an interleaf separation means capable of separating and discharging the fed interleaf PA in the interleaf discharge direction C.
11 and a control device 200 for controlling each drive control target means of the stencil type stencil printing apparatus 1000 as described below.
Is provided.

The paper discharge transport unit 5 transfers the front-side printed paper Pb discharged from the printing unit 10 to the first paper discharge tray 61 occupying the first displacement position P1 and the front-back printed paper Pb to the second discharge tray 61. Between the first paper discharge position HP1 to the first paper discharge tray 61 and the second paper discharge position HP2 to the second paper discharge tray 71 for transporting the paper to the paper discharge tray 71 of the second paper discharge tray 71, respectively. A discharge conveyance unit 50 as a movable discharge suction switching means,
A suction switching movement unit 120 for selectively moving the paper discharge transport unit 50 to a first paper discharge position HP1 and a second paper discharge position HP2; A separation pawl 34 that can be moved between a separation position close to the outer periphery of the print drum 26 and a non-separation position separated therefrom in order to separate the interleaf paper PA used as printing paper or test print paper from the print drum 26. It is mainly composed.

Here, the printed paper includes the front-side printed paper Pa and the front / back-side printed paper Pb. The surface-printed paper Pa refers to the paper printed on the surface of the printing paper P, which is one surface of the printing paper P. The front and back printed paper Pb refers to the paper printed on the back surface, which is the other surface of the front printed paper Pa.

As described below, the stencil type stencil printing apparatus 1000 is disclosed by the present applicant in Japanese Patent Application Laid-Open No.
In the same manner as proposed in Japanese Patent Application Laid-Open Publication No. H11-260, it is possible to perform an operation related to a double-sided printing mode for printing on the front and back surfaces of the printing paper P.
As proposed in Japanese Patent No. 44402, an operation related to a slip sheet mode for inserting a slip sheet PA between printed sheets is configured to be performed.

Hereinafter, the above-described document reading section 1, plate making section 2, plate feeding section 3, plate discharging section 8, printing section 10, bank sheet feeding section 3 will be described.
6, the first sheet discharge tray 61, the second sheet discharge tray 71, the sheet re-feeding unit 9, the sheet discharge transport unit 5, the slip sheet separation claw 111, the reverse transport path 99, and the configuration around the control device 200 will be described. .

As shown in FIG. 1, when a plurality of originals are set on the original receiving table 1a, the original reading section 1
While the document is sequentially conveyed one by one by an F (automatic document feeder), an image of the document is optically read by a reading unit (not shown) and converted into an electric signal by an image sensor (not shown) such as a CCD (Charge Coupled Device). Then, it can be output to the plate making section 2. The document reading section 1 is described in, for example,
It has the same configuration as that of Japanese Patent Application No. 29243 (Japanese Patent Application No. 4-35217), and a detailed description thereof will be omitted to avoid redundant description.

The plate-making section 2 is disposed on a side plate (not shown) of the body section 500, and is provided on a master support member (not shown) for supporting the master 21 so that it can be fed out. It is mainly composed of a thermal head 23 as plate making means for forming a plate by making a perforation, and a platen roller 22 which conveys the master 21 to the downstream side of the master conveying path while pressing it against the master. Master 21
It is composed of a thermoplastic resin film and a porous support, and is unwound from a master roll formed by winding the master 21 into a roll. The thermal head 23 has a plurality of heating elements arranged in a line, generates heat in a pulsed manner based on image information of a document sent from the document reading unit 1, and selectively punches the portion of the thermoplastic resin film by heating. It has a well-known configuration and function. The platen roller 22 is rotatably supported by a side plate (not shown) of the body section 500 and is driven to rotate in the direction of arrow A by, for example, a stepping motor (not shown).

The plate feeding section 3 is provided on the downstream side of the master transport path, and is provided with a cutter 25 for cutting the plate-making master 21a to a predetermined length, and is disposed on the downstream side of the master transport path of the cutter 25. A guide plate (not shown) for guiding the leading end of the master 21a to the clamper 27 of the printing drum 26, and a guide plate (not shown) for transporting the master 21a to the clamper 27 are driven to rotate by a stepping motor (not shown). Conveying roller pairs 24a, 24 in pressure contact with each other
b.

The plate discharge unit 8 presses a used master (not shown) on the print drum 26 to scoop up the used master from the rear end thereof, and peels off the plate in synchronization with the rotation of the print drum 26 to store the plate discharge. It is mainly composed of a pair of peeling rollers 18 and 19 that are pressed against each other to be discarded into a box 20 and a plate discharge storage box 20 that stores a used master (not shown). The peeling roller pairs 18 and 19 are driven to rotate by a motor (not shown).

The printing unit 10 includes a master 2 having a prepress
1a is wound around the printing drum 26 and rotates around a rotation center axis 29, ink supply means 30 for supplying ink to the inner peripheral surface of the printing drum 26, and plate making provided on the outer peripheral surface of the printing drum 26 And a clamper 27 for holding and holding the leading end of the finished master 21a, and a printing paper P, a surface-printed paper Pa, a plate-attached paper, or a test paper on the outer peripheral surface of the printing drum 26. It mainly comprises a press roller 28 as pressing means for pressing the slip sheet PA used as printing paper.

The printing drum 26 has a structure in which a mesh screen (both not shown) is wound around the outer peripheral surface of a support cylinder having a large number of apertures, and rotates around a rotation center axis 29. It is freely supported. The printing drum 26 is rotationally driven by the main motor 150 in the direction of arrow A (clockwise) and counterclockwise in the figure. The clamper 27 is opened and closed at a predetermined position by opening and closing means (not shown).

The ink supply means 30 is disposed inside the printing drum 26, is rotatably supported by a side plate (not shown) in the printing drum 26, and is rotated in synchronization with the printing drum 26 in the direction of arrow A in the figure. Ink roller 31
A doctor roller 33 that is provided with a slight gap from the outer surface of the ink roller 31 and forms an ink pool 32 having a wedge-shaped cross section with the ink roller 31;
An ink pipe shaft 29 which also serves as a rotation center shaft 29 and supplies ink to the ink reservoir 32 is mainly constituted.

As shown in FIGS. 1 and 6, a press roller 28 is provided at a lower position facing the ink roller 31 so as to be able to freely contact and separate from the printing drum 26. That is, the press roller 28 is provided on the plate-making master 21 on the printing drum 26 as the printing paper P, the surface-printed paper Pa, or the interleaf paper PA used as the printing paper or the test printing paper.
Is displaceable between a first position for pressing the first position and a second position distant from the first position. At the end of the press roller 28 on the far side as viewed in FIG. 1 (corresponding to the right front side in FIG. 6), a displacement for displacing the press roller 28 between the first position and the second position is provided. Means 8
7 are provided.

As shown in detail in FIG. 6, the press roller 28 is formed so that its width is substantially the same as the width of the printing drum 26, and a shaft 77 is inserted and fixed at the center. Both ends of the shaft 77 are provided with guide members 78 and 7.
8 rotatably supported. Guide members 78, 78
A central shaft 79 is inserted and fixed to an end opposite to the end supporting the shaft 77. The center axis 79 is located in the body 5
1 is rotatably supported by a side plate (not shown) of FIG.
, An operation plate 80 is fixed at one end thereof. The operating plate 80 is a thin plate formed in a vertically long shape, and has a central shaft 7.
A shaft 81a for rotatably supporting the cam follower 81 is fixed to an end opposite to the end fixed to the shaft 9.
The operation plate 80 is formed such that both side portions thereof protrude to the downstream side and the upstream side in the sheet conveyance direction X, respectively.
One end of a tension coil spring 82A is engaged with the protruding portion 80a on the print drum 26 side that is on the downstream side in the paper transport direction X. The other end of the tension coil spring 82 </ b> A is fixed to a side plate (not shown) of the body section 500, and a biasing force in the counterclockwise direction in FIG. The protruding portion 80b of the operation plate 80 on the upstream side in the sheet transport direction X is provided with a locking member 89 described later.
And can be disengaged.

A printing pressure gear 83 rotatably supported by a side plate (not shown) is provided further behind the operation plate 80 than the apparatus. The printing pressure gear 83 is transmitted with rotational force by meshing with a pinion 85 fixed to the output shaft end of a cam drive motor 84 attached to the body section 500, and is synchronized with the print drum 26 by the cam drive motor 84. It is driven to rotate. A printing pressure cam 8 is provided on the front side of the printing pressure gear 83.
6 is provided coaxially with the printing pressure gear 83. The printing pressure cam 86 is a substantially cocoon-shaped plate material, and the cam driving motor 8
4 is transmitted and rotated. Printing pressure cam 86
The outer peripheral surface of the cam follower 81 urged by the extension coil spring 82A is in contact with the outer peripheral surface formed on the outer peripheral surface of the cam follower 81. As described above, the displacement means 87 includes the operating plate 80,
Cam follower 81, tension coil spring 82A, printing pressure gear 8
3, a cam drive motor 84, a pinion 85, a printing pressure cam 86, and the like.

An engaging means 88 is provided near the upstream side of the displacement means 87 in the sheet conveying direction X. The locking means 88 mainly includes a locking member 89, a displacement solenoid 90, a tension coil spring 82B, and the like. The locking member 89 is a substantially L-shaped plate member, and is swingably supported by the support shaft 76 at a bent portion thereof. The support shaft 76 is implanted on a side plate (not shown) of the body section 500. One end 89a of the locking member 89 includes a tension coil spring 8
2B is engaged with the extension coil spring 82B.
Is attached to a side plate of the body section 500. Thus, a biasing force is applied to the locking member 89 in the counterclockwise direction about the support shaft 76 in FIG. Further, a tip end of a plunger 90 a of a displacement solenoid 90 is movably attached to one end 89 a of the locking member 89 via a shaft 75. Thereby, the locking member 8
9 is supported by a displacement solenoid 90, a tension coil spring 82B, and a support shaft 76 such that one end 89a is substantially horizontal. The other end 89b of the locking member 89 extends downward from the bent portion, and a cutout 89c is formed at the upper side edge. In this notch 89c,
The protruding portion 80b of the operation plate 80 is detachable. The displacement solenoid 90 uses a pull type, and
00 is attached and fixed to the side plate.

As described above, when the displacement solenoid 90 of the locking means 88 is turned on, the displacement means 87 is turned on.
, And the press roller 28 occupies the first position through the detailed operation described later. by this,
The press roller 28 rotates the front surface of the printing paper P, the back surface of the surface-printed paper Pa, or the interleaf paper PA used as the printing paper or the test printing paper, according to the master 21a or 21b on the printing drum 26. Press continuously. Displacement solenoid 90 of locking means 88
Is turned off, the displacement means 87 is deactivated, and the press roller 2 is turned on through the detailed operation described later.
8 occupies a second position remote from the first position. The displacement solenoid 90 is on / off controlled by the control device 200.

Next, the detailed configuration of the bank paper feed unit 36 will be described. The bank paper feed unit 36, as shown in FIG.
It is detachably disposed below the body section 500 via a paper supply body section 36A. The bank paper supply unit 36 includes a plurality of paper supply units (in the first embodiment, the two paper supply units described above for the sake of simplicity of description). The paper section 43 and the interleaf paper feeding section 44 provided in the lower stage, the lower portion of the vertical paper transport path 46 formed by the guide plate 49, and the upper and lower vertical paper transport paths 46 are pressed against each other in order. And three transport roller pairs 42 disposed therein. The printing paper feeding section 43 and the interleaf paper feeding section 44 constituting the bank feeding section 36 are arranged such that a user or the like faces the paper feed tray in a position facing the front side of the apparatus (in FIG. A front-loading type device configuration is employed in which the user can pull out and push in 37 to perform operations such as replenishment of printing paper P, interleaf paper PA, and the like.

The upper printing paper feeding section 43 mainly includes a feeding tray 37, a feeding roller 39, a separating roller 40, a separating pad 41 and the like. The paper feed tray 37 has a paper feed table 38 shown in FIG.
It mainly comprises a vertical movement mechanism 42 and the like shown in FIG. Hereinafter, in order to clarify that the vertical movement mechanism 42 shown in FIG. 7 of Japanese Patent Application Laid-Open No.
In addition to the above, the vertical movement mechanism 42 is omitted in order to avoid redundant description. The same applies to the components of the vertical movement mechanism 42.

The paper feed table 38 is provided with the paper feed bottom plate 39 shown in FIGS. 5 and 7 of Japanese Patent Laid-Open No. 7-144402.
The printing paper P is stacked and movable up and down substantially in the same manner as described above. A pair of side guide plates (not shown) for positioning the printing paper P in the width direction are provided on the upper surface of the paper feeding table 38 so as to be movable in the paper width direction. The printing paper P before printing stacked on the paper feed tray 38 of the printing paper feeding unit 43
Is a vertical movement mechanism 42 having the gear motor 55 shown in FIG. 5 of Japanese Patent Application Laid-Open No. 7-144402.
Is pressed by the paper feed roller 39. The vertical movement mechanism 4
Reference numeral 2 denotes a state in which the printing paper P is stacked on the sheet
In order to bring the uppermost printing paper P of the printing paper P loaded on the sheet 8 into contact with the paper feed roller 39 with an appropriate pressure, the paper feed table 38
And a paper feed table 38 from this raised position.
The paper feed table 38 is driven up and down between the paper feed table 38 and a lower position where paper supply can be performed by lowering the paper feed tray. The vertical movement mechanism 42 is provided in FIG.
As shown in the figure, the gear motor 55, the worm 56, the worm wheel shaft 57, the hub 5
8, the constant pulleys 59, 59, 59, the moving pulleys 60, 6
0, the wire 61, the pulse generator 62,
It mainly comprises the remaining amount sensor 63 and the like.

The paper feed roller 39 and the separation roller 40 are connected via a timing belt (not shown), and are driven to rotate by a paper feed motor 60-1 as paper feed driving means. A one-way clutch (not shown) is interposed between the paper feed roller 39 and its shaft and the separation roller 40 and its shaft, respectively.
Direction of feeding printing paper P (counterclockwise direction in FIG. 1)
It is rotatable only in. The feed motor 60-1 is
It consists of a stepping motor.

The paper feed roller 39 has a function of distributing the paper by contacting the uppermost print paper P on the paper feed table 38.
The separation pad 41 and the separation pad 41 each have a function of preventing double feed of sheets that sequentially separate and feed the printing sheets P distributed by the sheet feeding roller 39 one by one. The separation pad 46 is pressed against the separation roller 40 by a spring, and constitutes a paper double feed prevention mechanism. This paper double feed prevention mechanism has the same configuration as that shown in, for example, JP-A-5-294485, and a detailed description thereof will be omitted to avoid duplication. As described above, the feeding roller 39 and the separation roller 40
The separation pad 41 has a function as a paper feeding unit that separates and feeds the topmost printing paper P on the paper feeding table 38 one by one. As described above, the paper feed roller 39 is driven to rotate by the paper feed motor 60-1, and picks up and feeds the printing paper P abutting on the outer peripheral surface thereof. The operation of the feed motor 60-1 for driving the feed roller 39 and the separation roller 40 is controlled by the control device 200 as described later.

The pulse generator 62 and the remaining amount sensor 63 shown in FIG. 7 of Japanese Patent Application Laid-Open No. Hei 7-144402 correspond to the printing paper loaded on the paper feeding table 38 of the printing paper feeding unit 43. The printing paper detecting means 148 (same as the paper detecting means 65) shown in FIG.

Since the lower interleaf paper feeding section 44 has the same configuration as the printing paper feeding section 43, it is particularly distinguished from the paper feeding motor 60-1 of the printing paper feeding section 43 as the drive control target means. Only the paper feed motor 60-2 will be described. The feed motor 60-2 is a stepping motor similar to the feed motor 60-1. The operation of the sheet feeding motor 60-2 for driving the sheet feeding roller 39 and the separation roller 40 in the slip sheet feeding unit 44 is controlled by the control device 200 as described later.

The drive control target means of the printing paper feeding section 43 includes, in addition to the feeding motor 60-1, the vertical movement mechanism 4
2, the gear motor 55 and the like are collectively referred to as a printing paper feed driving unit 170 in FIG. 8 for the sake of simplicity of description. The drive control target means of the slip sheet feeding unit 44 includes a sheet feeding motor 6
0-2, the motor 44 of the paper feed tray moving means 41 and the gear motor 55 of the vertical movement mechanism 42.
For the sake of simplicity, the gear motor 55 and the like are collectively referred to as a slip sheet feed drive unit 160 in FIG.

The pulse generator 62 and the remaining amount sensor 63 shown in FIG. 7 of Japanese Unexamined Patent Publication No. Hei 7-144402 are composed of a slip sheet stacked on the sheet feeding table 38 of the slip sheet feeding section 44. It constitutes a slip sheet detecting means 146 (same as the sheet detecting means 65) shown in FIG. 8 only for detecting the number of PAs. Note that the above-described print sheet detection unit 148 and slip sheet detection unit 146 are not indispensable components of the first embodiment, and may be omitted if the advantage is not required. Not only the vertical movement mechanism 42 but also a paper feed tray elevating device described in Japanese Patent Application Laid-Open No. H11-240630 and Japanese Patent Application Publication No. Are also preferably used.

The three conveying roller pairs 42 are respectively connected by connecting belts, and are rotationally driven by one conveying motor composed of a stepping motor. Each of the paper feed motors 60-
1 and 60-2 are not limited to those independently provided as described above. For example, by providing one paper feed motor and an electromagnetic clutch, each paper feed unit 43 is provided by the one paper feed motor. , 44 may be sequentially switched and driven by the electromagnetic clutch.

In the first embodiment, each paper feed tray 37, 3
7 are A3 and A4 as paper sizes.
And other various sizes such as standard paper (plain paper) in terms of A3 paper size, for example. It is also possible to stack paper sizes. Here, for example, the printing paper feeding unit 43
In the paper feed tray 37, standard paper (A4 size) such as stencil high-quality paper is used as the print paper P, and in the paper feed tray 37 of the slip paper feed unit 44, as the paper PA, printing paper or test print paper is used. Assume that each piece of waste paper (A4 size) is stored. In the first embodiment, as the interleaf paper PA, use is made of waste paper or paper that is inexpensive as compared with the printing paper P, which meets the purpose, including paper used as printing paper or test printing paper. It is made of a material that functions to suppress at least set-off, contamination of the transport unit, and generation of surface printing stains, in other words, a material that can absorb ink. Also, as the interleaf paper PA, one that is larger than the area of the print image to be printed or printed on these sheets, including those used as printing paper or test printing paper, is used.

As shown in FIGS. 2 and 3, the first paper discharge tray 61 (hereinafter, referred to as a "paper discharge tray 61") is a paper discharge table 61b for stacking and storing front-surface-printed paper Pa and interleaf paper PA. Are integrally formed at one end of the paper discharge table 61b,
An end fence 67 for aligning one end of the front surface printed paper Pa and the interleaf paper PA; a plurality of rollers 62 rotatably provided on both sides of the paper discharge tray 61b;
b, and is mainly constituted by a pair of side guides 66a and 66b for aligning both side edges of the front-printed paper Pa and the interleaf paper PA to be stacked so as to be movable in both side directions. A chain 64 is provided substantially at the center of the paper discharge tray 61b.
Is fixedly protruded outwardly (in the direction perpendicular to the plane of the drawing) of both side edges of the paper discharge tray 61b, and is provided so as to be offset. The connection fixing portion 61a is fixed to the chain 64. I have.

The paper discharge tray moving means 100 comprises a horizontal moving mechanism 130 and an elevating mechanism 140, as shown in FIGS. The horizontal moving mechanism 130 is provided with a horizontal rolling surface 63f formed substantially horizontally on the second displacement position P2 side for rolling the plurality of rollers 62 and a second displacement position P2 from the first displacement position P1. Guide rails 6 each having an inclined rolling surface 63r that goes uphill toward the vehicle
3 and the discharge tray 61 are fixed by a connection fixing portion 61a, and are suspended over sprockets 70a, 70b, and 70c rotatably supported by a guide rail 63, and the discharge tray 61 is moved to a first displacement position. A chain 64 for moving to a position P1 and a second displacement position P2;
And a horizontal drive motor 65 fixedly mounted at one end and having a sprocket 70c. At the other end of the guide rail 63, the discharge tray 61 is moved to the first displacement position P.
1 and a stopper 63s for stopping the roller 62 is formed. The guide rail 63, the sprockets 70a, 70b, 70c, and the chain 64 are arranged side by side on both sides of the sheet discharge tray 61b, and these guide rails 63 are integrally connected by a connecting portion (not shown). The sprocket 70a is rotatably supported by the other end of the guide rail 63. The sprocket 70b is rotatably mounted on a fulcrum shaft 101 as one swing fulcrum, which is fixed to a side plate (not shown) of the body portion at a substantially boundary portion between the horizontal rolling surface 63f and the inclined rolling surface 63r. Supported.

The elevating mechanism 140 is provided with a rack 103 formed in one end of the guide rail 63 and extending downward in a substantially fan shape, and a pinion fixedly mounted on a side plate (not shown) of a body portion near the rack 103 and engaged with the rack 103. It mainly comprises an elevating drive motor 102 having a support 104 and a fulcrum shaft 101 which supports the guide rail 63 so as to swing.

The re-feed unit 9 is provided in FIG. 1 to FIG.
The paper discharge tray 61 on which the front surface printed paper Pa and the paper slip PA are stacked and moved to the second displacement position P2, and the initial printed paper slip PA 'on the paper discharge tray 61 occupying the second displacement position P2. , A paper re-feed roller 91 that contacts the uppermost surface of the paper Pa or the interleaf paper PA and distributes the paper, an initial printed interleaf PA 'distributed by the re-feed roller 91, A paper double feed prevention mechanism including a re-separation roller 92 and a re-separation pad 95 for separating and feeding the Pa, the interleaf paper PA, or the front and back printed paper Pb one by one; Front-printed paper Pa or interleaf paper PA, which is fed one by one sequentially by the paper double feed prevention mechanism
Roller pair 45a, 45b for feeding at a predetermined timing between the printing drum 26 and the press roller 28
And the pair of registration rollers 45a and 45b and the paper double feed prevention mechanism, and the back side of the front-printed paper Pa or the interleaf paper PA discharged in the print paper discharge direction B by the interleaf separation claw 111 So as to face the print drum 26,
The reversing conveyance path 99 as reversing conveyance means for reversing and conveying the front surface printed paper Pa, the interleaving paper PA, or the front and back printed paper Pb, and the front surface printed paper Pa An abutting plate 68 for abutting and aligning one end of the paper PA, and detecting the abutting state of one end of the surface-printed paper Pa and the interleaving paper PA provided on one side wall of the abutting plate 68 against the abutting plate 68. Sensor 6
9 and a top dead center detection sensor fixed to the side plate and for detecting the top dead center position of the uppermost surface of the front surface printed paper Pa or interleaf paper PA stacked and stored in the first paper output tray 61 94
It is mainly composed of As described above, the elevating mechanism 140 moves the paper ejection tray 61 integrally with the horizontal movement mechanism 130 about one fulcrum shaft 101, thereby printing the uppermost surface printed on the paper ejection tray 61. Paper P
The upper surface of the sheet a or the interleaf paper PA is brought into contact with the re-feed roller 91 provided in the re-feed section 9 to obtain a necessary pressing force of the feed roller.

The re-feed rollers 91, the re-separation rollers 92, and the re-separation pad 95 are connected to the print sheet feed section 43 and the slip sheet feed section 4.
4, the feed roller 39, the separation roller 40, and the separation pad 41
And has a function as a paper feeding unit that separates and feeds the uppermost surface-printed paper Pa and the interleaf paper PA on the uppermost surface of the paper discharge tray 61 one by one. The double feed prevention mechanism has the same configuration as that shown in, for example, Japanese Patent Application Laid-Open No. 5-294485. Refeed roller 91
The re-separation roller 92 is driven to rotate by a sheet feeding motor 60-3 including a stepping motor. As described above, the re-feed roller 91 is driven to rotate by the feed motor 60-3, and picks up and feeds the front-printed paper Pa, the interleaf paper PA, or the front-back printed paper Pb abutting on the outer peripheral surface thereof. The operation of the feed motor 60-3 that drives the re-feed rollers 91 and the re-separation rollers 92 is controlled by a control device 200 described later.

As each of the sensors 69 and 94, for example, a limit switch is used. In the re-feeding section 9, the front-surface-printed paper Pa or the interleaf P
In feeding the A or the front and back printed paper Pb or the like, the top dead center detection sensor 94 always detects the uppermost surface position of each sheet during feeding, and this detection signal is output to a control device 200 to be described later and controlled. The elevating mechanism 140 according to a command from the device 200
Is raised little by little so that the top surface position of each sheet is kept constant.

The reversing conveyance path 99 has a substantially U-shape, and is provided with a guide plate 9 disposed on the side of the sheet double feed prevention mechanism 145.
6, 96, guide plates 48, 48 arranged on the side of the pair of registration rollers 45a, 45b, and guide plates 96, 96.
And a pair of intermediate transport rollers 93 that are disposed between the pair of guide rollers 48 and 48 and that transport the front-surface printed paper Pa or interleaf paper PA to the pair of registration rollers 45a and 45b. The intermediate transport roller pair 93 is driven to rotate by a drive motor including a stepping motor (not shown).
The registration roller pairs 45a and 45b are driven to rotate by a drive motor including a stepping motor (not shown) independent of the conveyance motor of the intermediate conveyance roller pair 93.

The drive control target means of the re-feed unit 9 includes
In addition to the paper feed motor 60-3, the horizontal drive motor 65 of the horizontal movement mechanism 130 and the elevation drive motor 10 of the elevation mechanism 140
2 and the drive motor, etc., and these are referred to as a sheet re-feed drive unit 180 in FIG.

In FIG. 1, a second discharge tray 71 (hereinafter referred to as a “discharge tray 71”) is at a second discharge position H.
It is fixed to the body section 500 above the first paper discharge section 6 so as to face the downstream end of the paper discharge transport unit 50 occupying P2. The paper output tray 71b is a paper output tray 71b for loading and storing initial printed interleaf paper PA ′ and front and back printed paper Pb for initial printing (for plate printing and test printing) which are fed immediately after plate making. And the interleaved paper PA 'and the front and back printed paper P, which are integrally formed at one end of the paper discharge tray 71b.
end fence 73 for aligning one end of the sheet b, and both side edges of the initial printed interleaf paper PA 'and the front and back printed paper Pb which are movably provided in the direction of both sides of the paper discharge tray 71b. Pair of side guides 74a, 74
b.

The paper discharging and conveying unit 50 is similar to that shown in FIGS.
As shown in the figure, a pair of side plates 5 provided on the body 500
9a and 59b, a plurality of endless belts wound around a driving roller 52 fixed to a driving shaft 52s and a driven roller 53 fixed to a driven shaft 53s, and having a plurality of openings 54a. 54, the air inside the paper discharge transport unit 50 is sucked, and the front and back printed paper Pb is being transported.
And an air suction fan 55 for adsorbing the air onto the endless belt 54. The paper discharge transport unit 50 includes a plurality of endless belts 54, a paper transport surface 51 u provided between the endless belts 54, a housing side member 51 s that is closely attached to a lower portion of the outer circumference of the paper transport surface 51 u, A housing lower member 51d closely attached to a lower portion of the housing side member 51s forms a substantially housing structure. The endless belt 54 is made of a synthetic resin, but may be made of a material such as rubber.

The suction switching moving means 120 includes a pair of side plates 5.
Racks 58a, 58b provided on 9a, 59b, and pinions 57a meshing with both racks 58a, 58b,
57b, a shaft 56 connecting the pinions 57a and 57b on both sides, a worm wheel 121 provided on the shaft 56, a worm 122 meshing with the worm wheel 121, and a unit drive motor 123 for rotating the worm 122 It is mainly composed of The racks 58a and 58b are formed in a fan shape centering on the drive shaft 52s. A bracket 51B is fixed to a lower portion of the housing lower member 51d, and a shaft 56 is rotatably supported at both ends of the bracket 51B. The swing of the paper discharge transport unit 50 to the first paper discharge position HP1 and the second paper discharge position HP2 is performed by a command signal sent from the control device 200 via a motor drive circuit (not shown). This is done by sending and inputting to

The drive control target means of the sheet discharge conveyance section 5 includes a unit drive motor 123, a fan drive motor (not shown) for driving the air suction fan 55, and a drive for rotating the drive roller 52. A motor (not shown) and the like are included, and these are collectively referred to as a discharge transport driving unit 50A in FIG.

Normally, the paper discharge transport unit 50 is rocked and held by the suction switching movement means 120 so as to occupy the second paper discharge position HP 2, and the initial printed paper Pa 'To discharge.

Next, referring to FIG.
The surrounding configuration will be described. As shown in FIG.
Re-feeding path 112 connected to and connected to the re-separation roller 92 shown in FIG.
At the branch position where the vertical paper transport path 46 and the reverse transport path 99 intersect, the interleaving paper PA for initial printing and the paper P
An interleaf separation claw 111 that can switch the moving direction of A ′, the print paper S, the interleaf paper PA, the front-surface printed paper Pa, or the front and back printed paper Pb is provided.

As shown in FIG. 5, the interleaving paper separating claw 111
It is formed of a pawl member that can swing about a support shaft 111A provided at the base end, and the support shaft 111A is connected to a separation claw drive motor 115 composed of a stepping motor as interleaf separation drive means. Separating claw drive motor 115
Are controlled by the control device 200, so that the slip sheet separating claw 111 can swing and displace to the following three positions. That is, the interleaf separation claw 111 swings as shown by the broken line in FIG. 5 to connect the vertical paper transport path 46 and the reverse transport path 99, thereby supplying the paper from the print paper feed unit 43 shown in FIG. A paper feed displacement position for switching the fed print paper P, the slip sheet PA for initial printing fed from the slip sheet feed unit 44, and the slip sheet PA in the print sheet discharge direction B, FIG.
As shown by the solid line in FIG. 3, the re-feeding path 112 and the reversing transport path 99 are communicated with each other, so that the slip sheet PA or the slip sheet PA for initial printing fed from the re-feeding section 9 is printed. A refeeding displacement position at which the printed paper Pa is switched to be fed in the printing paper discharging direction B, and a refeeding path 112 and a slip sheet discharging path 113 which are swung as shown by a two-dot chain line in FIG. By the communication, the interleaf paper PA 'for initial printing and the interleaf paper PA fed from the re-feeding unit 9 can be swung to a slip sheet displacing position for switching to discharge in the slip sheet discharge direction C. ing.

The home position of the interleaf separating claw 111 is
The feed position is set to the paper feed displacement position indicated by a broken line in FIG. 5, and a light shielding piece 117 for detecting the home position is formed at the base end portion so as to protrude. On the other hand, a home position sensor 118 composed of a transmission type optical sensor that selectively engages with the light shielding piece 117 is disposed on the body section 500 side. Is detected.

Referring to FIG. 1, an operation panel 11 shown in FIG. As shown in FIG. 7, the operation panel 11 has a slip sheet key 12 as a slip sheet mode setting means for selecting and setting a slip sheet mode for inserting a slip sheet PA between printed sheets, and a print sheet P. A two-sided printing key 13 as a two-sided mode setting means for selecting and setting a two-sided printing mode for printing on the front side and the back side, a message display 17 for displaying print information and the like, and a ten-key 16 for setting printing conditions. A start key 14 for starting printing, a plate making start key 15 for setting and inputting activation of each operation from reading of an image of an original image to plate making, plate printing or plate feeding, and setting states of various modes And a confirmation key 189 and the like for confirming the information. The message display 17 is, for example, an LCD
(Liquid crystal display device), and is driven and controlled via a liquid crystal drive circuit (not shown).

Next, a control configuration around the control device 200 will be described with reference to FIG. The control device 200 is disposed below the operation panel 11 and inside the body section 500. The control device 200, as shown in FIG.
PU (Central Processing Unit) 201, I / O not shown
(Input / output) port, ROM (read only memory) 2
03. A microcomputer provided with a RAM (read / write storage device) 202 backed up by a backup power supply and capable of holding and storing data, a timer, and the like, which are connected by a signal bus.

The CPU 201 of the control device 200 communicates with the various keys (the slip sheet key 12 and the double-sided print key 13) of the operation panel 11, the sheet sensor 35, and the slip sheet detecting means 146 through the input port. , Printing paper detecting means 1
48, and is electrically connected to the home position sensor 118, and receives on / off signals and data signals from the various keys and the various sensors. The CPU 201 of the control device 200 transmits, via the output port, the message display 17 of the operation panel 11, the main motor 150, the cam drive motor 84, the displacement solenoid 90, the separation claw drive motor 115, and the paper feed motor 60.
And a paper feed motor 160 including
-1 and the like, the paper feed drive unit 170, the feed motor 60-3, the horizontal drive motor 65, and the elevation drive motor 1
02, etc., and the discharge conveyance drive unit 5
8A and the respective drive control target means not shown in FIG. 8 are electrically connected to each other, and various command signals are transmitted through various drive circuits (not shown). The signals are transmitted to the various motors, the solenoids, or the respective drive control target units.

The ROM 203 stores programs, data, and the like for executing a specific operation of the stencil making / printing apparatus 1000 described in an operation example to be described later. For example, as an example pre-programmed in the first embodiment, the printing drum 2 which is an operation example related to the initial print mode using a predetermined number of slip sheets PA as sheets for initial printing is used.
In order to fill the plate-making master on 6 with ink and bring the master into close contact with the outer peripheral surface of the printing drum 26, "printing printing", which is a printing operation performed immediately after plate-making and feeding, is performed separately from regular printing. An example may be given which is set in advance so as to be executed twice. The printing in the first embodiment is as follows.
It is set in advance so that one sheet of interleaf paper PA is fed from the interleaf paper feeding unit 44 to perform plate printing. The setting of the program, data, and the like is performed by giving data to the ROM 203 in advance, or by exchanging a ROM chip.

The RAM 202 has a function of temporarily storing the calculation / calculation results of the CPU 201, and a function of storing an on / off signal and a data signal inputted from each of the sensors and various keys at any time, and temporarily holds the storage. Has the ability to do. For example, the storage and holding function of the RAM 202 in the first embodiment includes a re-feeding unit 9 in the one-sided printing process.
From the bottom to the top in the discharge tray 61
An example in which the stacking order of the stacked front-side printed paper Pa and the interleaving paper PA is converted into a stacking order from the top to the bottom on the discharge tray 61 and stored and stored, or a refeeding unit in the duplex printing process. 9, the front-printed paper Pa, the interleaf paper PA, sequentially discharged and stacked in the discharge tray 61 from bottom to top.
An example in which the stacking order of the interleaving paper PA for the initial printing is converted into the stacking order from the top to the bottom on the paper output tray 61 and stored and stored, or the paper output tray in the re-feed unit 9 in the duplex printing process. The order of loading the front and back printed sheets Pb and the interleaf paper PA sequentially discharged and stacked from bottom to top in 61 is as follows:
An example of converting the stacking order from the uppermost position to the lowermost position on the discharge tray 61 and storing and storing the converted order is given.

In the first embodiment, the CP of the control device 200
U201 (hereinafter sometimes simply referred to as “control device 200” for simplicity of description) has not only a well-known calculation / calculation function and a control function, but also the following various control functions. When the printing is performed by setting the initial print mode, the controller 200 displaces the interleaving unit 87 with respect to the interleaving paper PA for initial printing fed by the paper feeding unit of the interleaf paper feeding unit 44.
When the print solenoid is turned on to control the displacement solenoid 90 to set the slip sheet mode and perform printing, the displacement means 87 with respect to the printing paper P fed by the paper feeding means of the printing paper feeding unit 43. , And the displacement solenoid 90 is turned off to deactivate the displacement means 87 with respect to the slip sheet PA fed by the sheet feeding means of the slip sheet feeding section 44. It has a function as an operation control means for controlling. Here, the control device 200
Determines that the initial print mode is set (printing mode setting in the first embodiment) based on a start signal from the plate making start key 15 when printing is performed by setting the initial print mode. The control device 200
Is used when setting the slip sheet mode and printing.
It is determined based on the slip sheet mode setting signal from Step 2 that the slip sheet mode is set.

When the two-sided printing mode is set, the control device 200 sets the first displacement position P1 on the first sheet feeding tray 61 in the re-feeding unit 9 (in the first sheet discharging unit 6 in the first embodiment). The interleaf paper feeding unit is configured to feed a predetermined number of interleaf papers PA for initial printing (one sheet in the first embodiment) to the uppermost part of the front surface printed paper Pa on the paper ejection tray 61 occupying the paper tray. A paper feed motor 60 for operating the paper feed means 44
-2, the interleaving paper PA for initial printing conveyed by the pair of intermediate conveyance rollers 93 via the reverse conveyance path 99 is placed on the discharge tray 71, and the paper Pa on the front side is moved to the first displacement position P1. When the sheet is conveyed toward the occupied paper discharge tray 61, the displacement solenoid 90 is turned on so as to actuate the displacement means 87 to print on the back surface of the interleaf paper PA for initial printing and the back surface of the front surface printed paper Pa. , PA
When the sheet is conveyed toward the sheet discharge tray 61b of the sheet discharge tray 61 occupying the first displacement position P1, the displacement solenoid 90 is turned off so as to deactivate the displacement means 87,
Thereafter, the sheet feeding motor 60-3 is controlled so as to operate the sheet feeding means of the sheet re-feeding unit 9 again by feeding the sheet Pb printed on the front and back sides via the sheet slipping sheet PA. Nail 11
1 to control the separation claw drive motor 115 so as to alternately discharge the front and back printed paper Pb in the print paper discharge direction B and the interleaf PA in the interleaf discharge direction C, respectively. The paper Pb on which the back side has been printed is
Has the function of turning off the displacement solenoid 90 so as to deactivate the displacement means 87 when it is conveyed toward.

Here, when the duplex printing mode is set, the control device 200 determines that the duplex printing mode is set based on the duplex printing mode setting signal from the duplex printing key 13. The control device 200 sends the interleaved paper Pa ′ that has been initially printed and the paper Pb that has been printed on the front and back sides to the discharge tray 71
And has a function of controlling the unit drive motor 123 of the paper discharge transport drive unit 50A so that the paper discharge transport unit 50 occupies the second paper discharge position HP2. In addition, the control device 200 controls the discharge delivery unit 50 to discharge the front surface printed paper Pa or the slip sheet PA to the discharge tray 61.
Paper discharge drive unit 50A so as to occupy the paper discharge position HP1
Has a function of controlling the unit drive motor 123.

Next, the operation of the first embodiment will be described. This operation is performed by the R
While referring to a program, print data, and the like stored in the OM 203 and performed under an instruction from the CPU 201 of the control device 200, a description of such a detailed control operation will be described in order to simplify the description. It may be omitted as appropriate, including embodiments and modified examples described below. The outline of the operation of the first embodiment is as follows. The operation relating to the plate printing mode is performed as the operation relating to the initial printing mode, and then the operation relating to the slip sheet mode is performed while performing the single-sided printing process. The operation relating to the plate printing mode is performed as the operation relating to the initial print mode related to the above, and then the operation relating to the slip sheet mode is performed while performing the double-sided printing process.

In FIG. 1, the document receiving table 1 of the document reading section 1
Assume that two originals A and B are set in a. When the operator presses the plate making start key 15 on the operation panel 11, only the second document B is first sent to a reading unit (not shown), and the image is read. That is, the document B is optically read by a reading unit (not shown) while being conveyed by an ADF (automatic document feeder) (not shown), and is photoelectrically converted by an image sensor (not shown). The photoelectrically converted electric signal is input to an analog / digital (A / D) conversion board (not shown), and the digitalized image information of the document B is sequentially transmitted to the plate making section 2. When the plate making start key 15 is depressed as described above, a start signal is generated, and the start signal is input to the control device 200, so that an initial print mode setting (plate printing mode setting in the first embodiment) is made.

In the plate making section 2, a plate making and plate feeding process is performed substantially in parallel with the image reading operation of the document B based on the digitally converted image information of the document B. That is, the rolled master 21 is conveyed while being fed out by the platen roller 22 being rotated in the direction of arrow A while pressing the master 21 against the thermal head 23.
With respect to the master 21 conveyed in this manner, the thermal head 23 causes the plurality of heating elements to selectively generate heat based on the image information of the document B from the document reading unit 1, and the master 21
Perforate plate making.

The perforated master 21a thus perforated in accordance with the image of the original B is sent out toward the outer peripheral side of the printing drum 26 by the pair of conveying rollers 24a and 24b of the plate feeding section 3, and is guided by a guide (not shown). The traveling direction of the printing drum 26 is changed downward by the plate, and the printing drum 26 is conveyed toward the expanded clamper 27 of the printing drum 26 at the plate feeding position.

When the leading end of the master 21a has reached the clamper 27, the clamper 27 closes at a predetermined timing and clamps the leading end. When the front end of the master 21a is clamped by the clamper 27, the main motor 1
When the printing drum 26 is intermittently rotated in the direction of arrow A by rotating the printing master 50, the master 21 a
Is wound around its outer periphery. And the master 21
a is cut by the cutter 25 into a predetermined length.

When the plate-making master 21a corresponding to one plate of the document B is completely wound around the printing drum 26, the plate making and plate feeding processes are completed, and the printing process corresponding to the image of the document B, that is, The one-sided printing process is started. In the one-sided printing process, the printing mode is set to the printing mode.
The gear motor 55 of the vertical movement mechanism 42 operates to feed one sheet of interleaf paper PA for initial printing (hereinafter, simply referred to as “interleaf paper PA”). As a result, the paper feed tray 38 of the slip paper feed unit 44 occupying the home position near the bottom dead center position rises, and the uppermost surface of the slip paper PA stacked on the paper feed tray 38 is fed by the paper feed roller. At the time when the pressure reaches the appropriate pressure by contacting the sheet 39, the operation of the gear motor 55 is stopped, and the elevation of the sheet feeding table 38 is stopped.

At this time, substantially the same operation as that described in the paragraph number (0035) of JP-A-7-144402 is performed. That is, when the worm 56 of the vertical movement mechanism 42 rotates, the pulse generator 62 rotates to generate a pulse, and the remaining amount sensor 63
Counts the number of pulses. Inserted paper P loaded
The number of pulses A causes a change in the amount of movement of the paper feed table 38 from its home position, and a corresponding change in the number of pulses generated, thereby detecting the number of slip sheets PA. Sent to Then, when the CPU 201 of the control device 200 determines from this signal that the number of remaining sheets of interleaf paper PA has decreased or has become zero,
An interleaf paper supply lamp (not shown) provided on the operation panel 11 is turned on.

When the uppermost surface of the interleaf paper PA on the paper feed table 38 comes into contact with the paper feed roller 39 and becomes an appropriate pressure, the paper feed motor 60-2 is operated by a command from the control device 200. As a result, the paper feed roller 39 is rotated and conveyed, and is separated one by one by the separation roller 40 and the separation pad 41 in the paper double feed prevention mechanism. Paper transport path 4 while being guided by
6. The slip sheet P transported to the vertical paper transport path 46
A is transported by a plurality of transport roller pairs 42 and is transported toward the registration roller pairs 45a and 45b. At this time, according to a command from the control device 200, the separation claw driving motor 115
Is controlled so as to occupy the paper feed displacement position indicated by the broken line in FIG. 5 which is its home position, so that the paper PA transported to the vertical paper transport path 46 The sheet is conveyed in the printing paper discharge direction B, and is further guided by the guide plate 48 forming a part of the reversing conveyance path 99 by the intermediate conveyance roller pair 93 while the registration roller pair 45a,
It is transported toward 45b.

[0097] The slip sheet PA conveyed as described above reaches a position where the leading end of the slip sheet PA comes into contact with a portion immediately before the nip portion of the pair of registration rollers 45a and 45b, and furthermore, is upstream of the pair of registration rollers 45a and 45b. When the controller 200 determines that the sheet has been conveyed to the stage where the bending of the sheet has been formed, the rotation of the pair of conveying rollers 42 and the pair of intermediate conveying rollers 93 are stopped by a command from the controller 200.

The printing section 10 performs a printing operation in parallel with the sheet feeding operation of the slip sheet feeding section 44. That is, the registration roller pair 45a, 45b is rotated by the operation of the drive motor that has been stopped in accordance with the rotation of the printing drum 26, so that the slip sheet PA is transported from the printing paper discharge direction B to the paper transport direction X. Then, the paper is fed between the printing drum 26 and the press roller 28. At this time, the paper sensor 35 outputs a signal when the leading end of the slip sheet PA crosses the paper sensor 35, and the signal is input to the RAM 202. R
The signal input to the AM 202 is read from the ROM by the CPU 201.
The print solenoid is collated with the print data stored in 203, a signal is sent from the CPU 201 based on the print data, and the displacement solenoid 90 shown in FIG. 6 is energized. In addition,
When the stopped registration roller pairs 45a and 45b rotate, the registration roller pairs 45a and 45b depend on the size of the interleaf paper PA and the printing paper P (particularly, the length in the transport direction).
The driving load of the driving motor for rotating the pair of registration rollers 45a, 45b is increased.
b causes slippage, skew, and the like, so that the slip sheet PA or the printing sheet P cannot be sent out at an appropriate timing. Therefore, by controlling the drive motor of the intermediate transport roller pair 93, the intermediate transport roller pair 93 is driven. The registration roller pair 45a, 45b may be rotated to assist the conveyance operation of the registration roller pair 45a, 45b.

When the displacement solenoid 90 is energized, the displacement solenoid 90 attracts the plunger 90a, whereby the locking member 89 is rotated clockwise around the support shaft 76 against the urging force of the extension coil spring 82B. Notch 89 of stop member 89
The operating plate 80 that locks the protruding portion 80b to c is released in the counterclockwise direction about the central axis 79 by the urging force of the extension coil spring 82A. Working plate 8
The rotation of the cam follower 81 causes the outer circumferential surface of the cam follower 81 to rotate.
6, the operating plate 80 is swung along the contour outer peripheral surface of the printing pressure cam 86, so that the press roller 28 has its outer peripheral surface aligned with the plate-made master 21a on the printing drum 26. It is displaced to a first position where paper PA is pressed.

A plate-making master 21a in which a press roller 28 is wound around the outer peripheral surface of a printing drum 26 via a slip sheet PA
Is pressed against the plate-making master 21a, whereby the slip sheet PA is pressed against the plate-making master 21a, and the ink is transferred from the inner peripheral surface of the printing drum 26 to the surface of the sheet-making paper PA through the perforated portion of the plate-making master 21a. Thus, a print image corresponding to the document B is formed and transferred. When the print drum 26 rotates in the direction of arrow A in the figure and the clamper 27 reaches the vicinity of the press roller 28 that is in pressure contact with the print drum 26, the cam driven in synchronization with the rotation of the print drum 26 Since the drive motor 84 causes the printing pressure cam 86 to rotate the most protruding portion thereof to a position in contact with the cam follower 81, the press roller 28 is separated from the clamper 27 protruding outward from the printing drum 26, Interference between the press roller 28 and the clamper 27 can be avoided.

Stencil type stencil printing machine 1 in Embodiment 1
In the case of 000, as described above, the first printed matter immediately after the plate-making is supplied is referred to as “printing printing” and is excluded from the official printed matter for checking the print image. In addition, one or two sheets may be printed in order to confirm the position of the print image, referred to as "test print printing", and this is also excluded from the official print.

1 where the print image corresponding to the original B is transferred
The initially printed interleaf paper PA 'is separated from the printing drum 26 by the separation claw 34 moved to the separation position, and is ejected and held by the suction switching moving means 120 to the second ejection position HP2. The paper is discharged to the paper discharge tray 71 by the transport unit 50. That is, one initial printed interleaf paper PA ′ for plate printing (for initial printing) is conveyed to the paper discharge tray 71 by the endless belt 54 of the paper discharge conveyance unit 50 and discharged, so-called plate printing is performed. finish. At this time, the interleaved paper PA ′ that has been initially printed is adsorbed on the surface of the endless belt 54 by the air suction fan 55 sucking the air in the paper discharge conveyance unit 50 downward from the opening 54 a of the endless belt 54. It is transported while.

On the other hand, the press roller 28 is
When the printing drum 26 makes approximately three-quarters of a turn from the point of contact with the outer peripheral surface of the plate, the point where the most protruding portion of the printing pressure cam 86 comes into contact with the cam follower 81, that is, the notch 89c of the locking member 89 and the operating plate At the time when the projection 80 can be locked with the projection 80b, a signal is sent from the control device 200 and the energization to the displacement solenoid 90 is cut off. Then, the locking member 89 becomes
It is rotated counterclockwise by the urging force of the tension coil spring 82B, and the projection 80b of the operation plate 80 is locked in the notch 89c. The press roller 28 is now in contact with the printing drum 26.
Is held at a second position away from the outer peripheral surface.

Next, when the operator takes out the interleaved sheet PA 'having been printed onto the sheet ejection tray 71 and confirms it, it is OK to set the number of prints with the ten keys 16 on the operation panel 11, and the interleaving key 12, A double-sided printing key 13 is pressed, and then a start key 14 is pressed. Then, when the slip sheet key 12 is pressed, a slip sheet mode setting signal is generated, and is input to the control device 200 to enter the slip sheet mode setting state. By pressing the double-sided printing key 13, a double-sided printing mode setting signal is generated. Since the initial printed interleaf paper PA ′ discharged to the paper discharge tray 71 has been taken out, no printed matter is left on the paper discharge tray 71.

When the series of various key operations by the operator is completed, the operation for feeding one sheet of initial printing paper PA for initial printing from the paper feeding section 44 and performing plate printing is substantially the same as the operation. Then, the printing operation is performed on the front surface of the first printing paper P after the printing paper P is fed from the printing paper feeding unit 43. The operation of feeding and printing on the front side of the first printing paper P is compared with the operation of feeding one sheet of interleaving paper PA for initial printing from the interleaf paper feeding unit 44 and performing plate printing. Then, instead of the interleaving paper PA for initial printing, the paper feed motor 60-2
In place of the operation described above, the operation is replaced with the operation of the paper feed motor 60-1, and the operation of discharging the paper can be easily implemented simply by being different as described below. That is, the one surface-printed sheet Pa on which the print image corresponding to the document B has been transferred is separated from the printing drum 26 by the separation claw 34 moved to the separation position, and the sheet discharge conveyance unit 50 is moved by the suction switching movement unit. After the paper Pa is swung from the second paper discharge position HP2 to the first paper discharge position HP1 by 120, the paper Pa on which the front surface has been printed is discharged.
By being transported by the same operation as the above-described operation,
The print image is discharged onto the discharge tray 61 occupying the first displacement position P1 with its print image surface facing upward. At this time, the switching operation from the second paper discharge position HP2 of the paper discharge conveyance unit 50 to the first paper discharge position HP1 by the suction switching movement means 120 is performed by the unit drive motor 12 of the suction switching movement means 120.
3 is driven to rotate the worm 122, and the worm wheel 121 meshing with the worm 122, the shaft 56, and the pinions 57a, 57b are sequentially rotated, and the sheet discharge / conveyance unit 50 moves the rack around the drive shaft 52s. Along the first paper discharge position HP1 along 58a, 58b
It is performed by being rocked to.

After the printing on the first printing paper P is completed, since the operation setting relating to the slip sheet mode has already been made, the printing operation is performed by continuously feeding the second printing paper P. Instead, an operation is performed in which one interleaf paper PA is fed from the interleaf paper supply unit 44 and only the paper is passed. That is, like the first sheet of printing paper P, one sheet of paper PA fed from the sheet feeding unit 44 is conveyed to the pair of registration rollers 45a and 45b to adjust the timing with the printing drum 26. After that, the slip sheet PA is transferred to the printing drum 26 by the pair of registration rollers 45a and 45b.
And between the press roller 28. At this time, 1
Similarly to the sheet P, a signal is output from the paper sensor 35, and the signal is input to the RAM 202. RA
The signal input to M202 is stored in ROM2 by CPU201.
The print data is compared with the print data stored in No. 03. However, this print data is different from the print data of the first sheet, so that the displacement solenoid 90 is not energized.
Therefore, the press roller 28 is not displaced while being held at the second position, and the slip sheet PA passes between the print drum 26 and the press roller 28 and occupies the first sheet discharge position HP1. After being conveyed to the paper discharge transport unit 50, the paper is conveyed and stacked on the front surface printed paper Pa placed on the paper discharge tray 61 by the paper discharge transport unit 50.

Thereafter, the printing by feeding the second printing paper P is performed in the same manner as the first printing paper P, and after the front printing on the second printing paper P, one printing is performed. Eye printing paper P
The printing and paper passing operation in which the printing paper P and the paper PA are alternately fed is performed such that the same operation as the paper passing when the paper PA after the front side printing is fed is performed. This operation is repeated up to the set number of prints. Thus, when printing on the printing paper P, the press roller 28 is displaced to the first position,
By storing in the ROM 203 print data indicating that the press roller 28 is not displaced when the paper is passed through the slip sheet PA, the front-printed paper Pa and the unprinted slip sheet PA are alternately discharged onto the discharge tray 61.・ Load. Thus, the excess ink of the surface-printed paper Pa discharged with the print image surface facing upward is absorbed by the unprinted interleaf paper PA, and the problem of ink set-off is prevented.

In this way, the printing and paper passing operations, and the paper discharging operation, in which the printing paper P and the interleaf paper PA are alternately fed, are repeatedly performed for the set number of printed sheets. In a mode in which the unprinted interleaf PA is inserted between the Pas, in other words, the front-printed paper Pa and the unprinted interleaf PA are alternately discharged onto the paper output tray 61b of the paper output tray 61 sequentially. Be loaded.

Then, after each of the front side printing and paper discharging steps of feeding the printing paper P for the set number of prints is completed, based on the print data relating to the duplex printing mode stored in the ROM 203, The control device 200 controls the paper discharge tray 61b (hereinafter simply referred to as the “paper discharge tray 61”) of the paper discharge tray 61 occupying the first displacement position P1 in the first paper discharge unit 6.
A paper feed motor for operating the paper supply means of the paper supply unit 44 so as to feed one paper PA for initial printing to the uppermost part of the upper surface printed paper Pa on the upper surface. 60-2. Thereby, as shown in FIG.
Front-side printed paper P on the paper output tray 61b of the paper output tray 61
In the uppermost part a, one interleaf paper PA for initial printing related to the double-sided printing process is loaded. Where RA
In M202, the stacking order of the front-printed paper Pa and the interleaf paper PA sequentially discharged and stacked from the bottom to the top in the discharge tray 61 of the re-feed unit 9 in the one-sided printing process is indicated on the discharge tray 61. The print data converted into the stacking order from the top to the bottom is stored and held.

When the printing of the front-surface-printed paper Pa on which the print image corresponding to the image of the document B has been completed, the plate discharging process by the operation of the plate discharging unit 8 is executed. First, the printing drum 26 is rotated in a counterclockwise direction, and the rear end of a used master (not shown) formed by perforating and making a plate corresponding to the image of the document B on the outer peripheral surface of the printing drum 26 is removed by the peeling roller 1.
When approaching the rollers 8 and 19, the rollers 18 and 19 are rotated in the direction of the arrow in the drawing while scooping up the rear end of the used master by one peeling roller 19, and the used master is printed by both rollers 18 and 19. The sheet is conveyed while being peeled off in synchronism with the rotation of the drum 26, discharged into the plate discharge storage box 20, and pushed.

In this way, when the used master (not shown) punched and made in accordance with the image of the document B is peeled off from the outer peripheral surface of the printing drum 26 and the plate discharging process is completed, the document reading section 1 The first document A is sent to the reading unit. That is, the original A is read in the same manner as the image reading operation of the original B, and the digitally converted image information of the original A is sequentially transmitted to the plate making unit 2.

In the plate making section 2, similar to the plate making and plate feeding process of the document B, the image reading operation of the document A is performed substantially in parallel.
Original A based on image information of original A converted into a digital signal
The plate making and plate feeding steps are performed. In this manner, a perforated master 21b (shown in parentheses in FIG. 1) that has been perforated in accordance with the image of the original A is transferred to the outer peripheral side of the print drum 26 by the pair of transport rollers 24a and 24b of the plate feed unit 3. The printing paper 26 is fed toward the printing drum 26, and its traveling direction is changed downward by a guide plate (not shown), and is conveyed toward the expanded clamper 27 of the printing drum 26 at the plate feeding position.

When the leading end of the master 21b has reached the clamper 27, the clamper 27 closes at a predetermined timing and clamps the leading end. When the leading end of the master 21b is clamped by the clamper 27, the printing drum 26
Master 2 is intermittently rotating in the direction of arrow A
1b is wound around its outer periphery. Then, the plate-making master 21b is cut into a predetermined length by the cutter 25.

On the other hand, the original A after the one-sided printing process has been completed
In parallel with the stencil making process, the first sheet discharging position HP1 of the sheet discharging and conveying unit 50 by the suction switching moving means 120 is moved to the second position.
To the paper discharge position HP2 and the paper discharge tray moving means 1
The movement operation of the sheet discharge tray 61 from the first displacement position P1 to the second displacement position P2 is performed at the time 00.

That is, from the first paper discharge position HP1 of the paper discharge conveyance unit 50 by the suction switching movement means 120, the second
The switching operation to the paper discharge position HP2 is performed in the direction opposite to that in the single-sided printing process, and the unit drive motor 123 of the suction switching moving means 120 is driven to rotate in the reverse direction to rotate the worm 122. The worm wheel 121 meshing with the worm 122, the shaft 56, and the pinions 57a, 57b are sequentially rotated, so that the sheet discharging / conveying unit 50 is driven by the racks 58a, 58b around the drive shaft 52s.
Along with the second paper discharge position HP2.

On the other hand, the operation of moving the discharge tray 61 from the first displacement position P1 to the second displacement position P2 by the discharge tray moving means 100 is performed as follows. That is,
1 and 2, first, the horizontal drive motor 65 of the horizontal moving mechanism 130 is driven to rotate in the direction of arrow A, and the chain 64 is conveyed in the direction of arrow X. 63, and the horizontal rolling surface 63f is rolled on the
When one end of the front-printed paper Pa and the interleaf paper PA stacked on the sheet 1 comes into contact with the abutting plate 68, the sensor 69 detects this and stops the rotation of the horizontal drive motor 65. Thus, the paper discharge tray 61 is moved to the position shown in FIG.

Next, in FIG. 3, the lift drive motor 102 of the lift mechanism 140 is driven to rotate in the direction of arrow B1 to rotate the pinion 104 meshing with the rack 103, so that the guide rail 63
And the fulcrum shaft 101 with the horizontal drive motor 65 and the like mounted thereon.
Is swung upward about the swing center. When the top dead center position of the topmost interleaf sheet PA on the discharge tray 61 is detected by the top dead center detection sensor 94, the topmost interleaf sheet PA is re-rolled under an appropriate pressure. When the control device 200 determines that the motor has come into contact with
2 is stopped, and the discharge tray 61 occupies the second displacement position P2.

Next, as in the single-sided printing process, plate printing (or test printing) corresponding to the image of the document A is performed. First, a top-side interleaving sheet PA (hereinafter, referred to as a sheet) on the sheet discharge tray 61 occupying the second displacement position P2.
(Sometimes simply referred to as “insertion sheet PA”). That is, the sheet feeding motor 6 is controlled by a command from the control device 200.
0-3 is operated, whereby the re-feed roller 91 is rotated to convey the uppermost interleaf sheet PA. Are separated one by one, and are fed in the re-feeding direction E shown in FIG. 5 while being guided by the pair of guide plates 96, so that they pass through the re-feeding path 112 shown in FIG. The sheet is further conveyed by a pair of intermediate conveyance rollers 93 while passing through a reverse conveyance path 99, and conveyed toward a pair of registration rollers 45a and 45b while being guided by a pair of guide plates 48. At this time, according to a command from the control device 200, the separation claw driving motor 115
Is controlled so that the interleaving sheet separation claw 111 swings from the paper feeding displacement position shown by the broken line in FIG. The PA is conveyed from the paper re-feeding direction E to the printing paper discharge direction B, and when passing through the reversing conveyance path 99, the front and back sides are reversed in the reversing conveyance path 99.

In this manner, the interleaf sheet PA for plate printing is printed by the same operation as the interleaf sheet PA for plate printing in the single-sided printing process, with the rotation of the print drum 26 being synchronized with the rotation of the print drum 26 by the pair of registration rollers 45a and 45b. The printing is performed by the printing unit 10 in parallel with the sheet feeding operation of the sheet re-feeding unit 9. That is, as described above, the stopped registration roller pair 45a, 45b is rotated in accordance with the rotation of the print drum 26, so that the slip sheet PA is transported from the print paper discharge direction B to the paper transport direction X. Then, the paper is fed between the printing drum 26 and the press roller 28. At this time, the paper sensor 35 outputs a signal when the leading end of the slip sheet PA crosses the paper sensor 35, and the signal is input to the RAM 202. The signal input to the RAM 202 is
Is compared with the print data stored in the ROM 203, a signal is sent from the CPU 201 based on the print data, and the displacement solenoid 90 shown in FIG. 6 is energized. When the displacement solenoid 90 is energized, the press roller 28 is displaced to the first position where the outer peripheral surface presses the slip sheet PA against the plate-making master 21a on the printing drum 26 by the same operation as described above. The press roller 28 is pressed against the plate-making master 21b wound around the outer peripheral surface of the printing drum 26 via the slip sheet PA, whereby the slip sheet PA is pressed against the plate-making master 21b.
Is transferred from the inner peripheral surface of the master A to the surface of the interleaving paper PA through the perforated portion of the master 21b.
Is formed and transferred.

The interleaved paper PA 'on which the print image corresponding to the document A has been transferred is separated from the printing drum 26 by the separation claw 34 moved to the separation position, and the second discharge paper is moved by the suction switching movement means 120. The paper is conveyed to the paper discharge tray 71 by the paper discharge conveyance unit 50 that is rocked and held at the paper position HP2. That is, one initial printed interleaf PA ′ for plate printing (for initial printing) is transported to the paper output tray 71 by the endless belt 54 of the paper output transport unit 50, and is discharged.
Plate printing related to the double-sided printing process ends. At this time, the interleaved paper PA ′ that has been initially printed is adsorbed on the surface of the endless belt 54 by the air suction fan 55 sucking the air in the paper discharge conveyance unit 50 downward from the opening 54 a of the endless belt 54. It is transported while.

On the other hand, the press roller 28 is
When the printing drum 26 makes approximately three-quarters of a turn from the point of contact with the outer peripheral surface of the plate, the point where the most protruding portion of the printing pressure cam 86 comes into contact with the cam follower 81, that is, the notch 89c of the locking member 89 and the operating plate At the time when the projection 80 can be locked with the projection 80b, a signal is sent from the control device 200 and the energization to the displacement solenoid 90 is cut off. Then, as described above,
The locking member 89 is rotated counterclockwise by the urging force of the extension coil spring 82B, and the operating plate 80
The press roller 28 is held at the second position away from the outer peripheral surface of the print drum 26.

Next, the operator takes out the initial printed interleaf PA 'discharged to the paper output tray 71 and confirms it.
You only need to press. The input of the number of prints is performed by storing the number of prints when the input signal data is in the single-sided printing process of the document B in the RAM 202 and displaying the message display 17 of the operation panel 11 and a display unit such as the number of prints (not shown). It is unnecessary because it is displayed. Similarly, the slip sheet mode setting signal data and the duplex printing mode setting signal data generated by pressing the slip sheet key 12 are also R.
It is stored and held in the AM 202. Since the initially printed interleaf paper PA 'discharged to the paper discharge tray 71 has been taken out, no printed matter is left on the paper discharge tray 71 as described above.

As described above, when the key operation by the operator for obtaining a regular printed matter corresponding to the original A is completed, one sheet of the initial printing interleaving paper PA from the re-feeding unit 9 is fed and the plate is attached. The printing operation on the back side is performed by feeding the front-printed sheet Pa from the re-feeding unit 9 in almost the same manner as the printing operation. The paper feeding and printing operation at this time is compared to the operation of feeding one sheet of initial printing interleaf PA from the re-feeding unit 9 and performing plate printing, and comparing the operation with the interleaf paper PA for initial printing. Instead, the paper Pa is replaced with the front-printed paper Pa, and the paper discharge operation can be easily performed only by a difference as described below. Therefore, the description of the operation is partially omitted.
That is, in the printing unit 10, the front and back printed paper Pb on which the print image corresponding to the document A is transferred to the back of the front printed paper Pa is separated by the separation claw 34 moved to the separation position.
The sheet is separated from the printing drum 26 by the
Is moved to the second discharge position HP2 by the suction switching movement means 120.
Is swung to the first paper discharge position HP1, and the front and back printed sheets Pb are conveyed by the same operation as the above-described operation of the paper discharge conveyance unit 50, so that the first displacement position P
The printed image is discharged onto the paper discharge tray 61 occupying 1 with its print image side up. At this time, the suction switching moving means 120
The switching operation of the paper discharge transport unit 50 from the second paper discharge position HP2 to the first paper discharge position HP1 is performed in the same manner as described above.

After the printing of the first sheet corresponding to the document A is completed, the operation setting relating to the slip sheet mode has already been made. The operation of feeding the interleaf paper PA (which is the interleaf paper PA for preventing surface printing stains) on the paper discharge tray 61 stacked under and performing only the paper passing is performed. That is, the interleaf paper PA fed from the re-feed unit 9 is conveyed to the pair of registration rollers 45a and 45b, like the first surface-printed paper Pa, and then joined by the pair of registration rollers 45a and 45b. The paper PA is fed between the printing drum 26 and the press roller 28. At this time, a signal is output from the paper sensor 35 and the signal is input to the RAM 202 as in the case of the first surface-printed paper Pa. The signal input to the RAM 202 is compared with the print data stored in the ROM 203 by the CPU 201, but this print data is different from the print data of the first sheet, and the power to the displacement solenoid 90 is not applied. It has become. Therefore, the press roller 28 is not displaced while being held at the second position,
The slip sheet PA passes between the print drum 26 and the press roller 28 and is conveyed to the sheet discharge conveyance unit 50 occupying the first sheet discharge position HP1, and then is discharged by the sheet discharge conveyance unit 50 to the sheet discharge tray. The paper is discharged and stacked on the front and back printed paper Pb placed on the paper 61.

Thereafter, the second surface of the front-surface-printed paper Pa is fed, and the printing on the back surface is performed in the same manner as the first surface-printed paper Pa on the back surface. After printing on the back surface of the front surface printed paper Pa, the same operation as feeding the interleaf paper PA after printing on the back surface of the first front surface printed paper Pa is performed. Then, the printing and the sheet passing operation in which the front-printed paper Pa and the interleaf paper PA are alternately fed are repeated up to the set number of prints. In this manner, the print data that the press roller 28 is displaced to the first position when printing the front surface printed paper Pa on the back surface and the press roller 28 is not displaced when the paper Pa is passed through the slip sheet PA is stored in the ROM 203. In this way, the front and back printed sheets Pb and the unprinted interleaf paper PA are alternately discharged and stacked on the discharge tray 61.

In this way, the printing and paper passing operations of alternately feeding the front and back printed papers Pb and the interleaf paper PA and the paper discharging process are repeatedly performed for the set number of printed sheets.
As shown in FIG. 10, front and back printed sheets Pb and unprinted interleaving sheets PA are alternately discharged and stacked on the discharge tray 61 alternately. Therefore, the excess ink of the front and back printed paper Pb discharged with the print image surface corresponding to the original A facing up is absorbed by the unprinted slip sheet PA, and is referred to as contamination of the transport unit and front surface printing stain. Problems can also be prevented. Here, in the RAM 202, the front and back printed sheets Pb and the interleaving sheet P sequentially discharged and stacked from the bottom to the top in the discharge tray 61 of the re-feeding unit 9 in the duplex printing process.
The print data obtained by converting the stacking order of A into the stacking order from the top to the bottom on the discharge tray 61 is stored and held.

After each of the steps of feeding and printing the front surface-printed paper Pa for the set number of prints and discharging the paper, the control device 200 returns to the control unit 200 based on the print data stored in the ROM 203. , Front and back printed paper Pb
The horizontal drive motor 65 of the horizontal movement mechanism 130 is drive-controlled so that the paper discharge tray 61 on which the unprinted interleaf paper PA is alternately stacked moves to the position shown in FIG. further,
The control device 200 determines that the discharge tray 61 is in the second displacement position P.
Lifting drive motor 10 of the lifting mechanism 140
2 is controlled. As a result, the discharge tray 61 moves to occupy the second displacement position P2 by the same operation as described above, and stops at the second displacement position P2.

Next, the control device 200 controls the sheet feeding motor 60- so as to feed the front and back printed sheets Pb via the interleaving sheet PA again and to operate the sheet feeding means of the re-feeding section 9.
3 is controlled, the interleaving paper separating claw 111 is operated to alternately discharge the front and back printed paper Pb in the printing paper discharging direction B and the interleaving paper PA in the interleaving paper discharging direction C, respectively. 115, and at this time, when the front and back printed paper Pb is conveyed toward the paper discharge tray 71, the displacement solenoid 90 is turned off so as to deactivate the displacement means 87.

As a result, by operating the paper feed motor 60-3, the top and bottom printed paper Pb on the uppermost surface of the paper discharge tray 61 occupying the second displacement position P2 is separated into one sheet. When the paper is fed, the separation claw driving motor 115 is controlled by a command from the control device 200 so that the interleaf separation claw 111 swings to the refeeding displacement position shown by the solid line in FIG. The front and back printed paper Pb conveyed to the paper feed path 112 is separated and conveyed from the paper re-feeding direction E to the print paper discharge direction B. Then, while passing through the reverse transport path 99, the transport is performed by the intermediate transport roller pair 93 while the reverse transport path 9 is being transported.
9, the front and back sides are again inverted, and thereafter, by the same operation as that performed on the interleaf paper PA that is passed to prevent set-off and surface printing stains as described above, the front and back printed paper Pb
Is transported between the print drum 26 and the press roller 28 held at the second position toward the paper discharge transport unit 50. At the time of discharging the front and back printed paper Pb, the discharge switching unit 120 swings and holds the discharge and transport unit 50 to the second discharge position HP2, and the front and back printed paper Pb is discharged as described above. The sheet is discharged to the sheet discharge tray 71 through the operation of the transport unit 50.

After the discharge of the top-most first front and back printed sheet Pb on the discharge tray 61 is completed, the second interleaving paper PA from the top is separated by the paper feeding means to feed one sheet. Is done.
At this time, the separation claw drive motor 115 is controlled by the command from the control device 200 so that the slip sheet separation claw 111 swings to the slip sheet displacement position shown by the two-dot chain line in FIG. The slip sheet PA conveyed to the path 112 is conveyed while being guided by the slip sheet guide plate 114 from the re-feed direction E to the slip sheet discharge direction C, and is discharged to the slip discharge tray 98.

Hereinafter, the discharge tray 61 in the re-feeding section 9
The upper and lower printed paper Pb and the interleaving paper PA are separated by the interleaving paper separating claw 111 in the printing paper discharge direction B in the same manner as described above.
And the interleaved paper discharge direction C, the front and back printed sheets Pb are discharged and stacked on the discharge tray 71, and the interleaf PA is discharged and stacked on the interleaf discharge tray 98.

The embodiment of the present invention is the same as the embodiment 1 described above.
However, in the first embodiment, if it is desired to check a print image by trial printing at any time, a trial print key (not shown) is provided on the operation panel 11, and the trial print key is set by pressing the trial print key. Then, test printing can be performed. In this case, the test prints may be excluded from the regular prints in the same manner as the plate prints.

Further, in the first embodiment described above, an example in which only one sheet of interleaf paper PA for initial printing is fed to perform plate printing is described. However, the present invention is not limited to this.
After a long period of time of 00, or when the print image rises poorly due to fluctuations in various environmental conditions, for example, two or more sheets of initial printing interleaving paper PA, that is, a required predetermined number of sheets are fed, and plate printing is performed. May go. In this case, the ROM 203
In the printing program data relating to the printing printing mode stored in the printing printing mode, the printing paper data for the initial printing is fed so as to feed a predetermined number of papers and the printing paper for the initial printing is printed.
It is preferable to provide means for resetting the number of sheets fed. As the setting means, for example, an initial print key (not shown) for changing the print program data relating to the plate printing mode is attached to the operation panel 11, and after the initial print key is pressed, the ten keys 16 are used for initial print. In this example, a predetermined number of slip sheets PA is set and input, and finally the confirmation key 189 is pressed to determine the number.

Therefore, according to the first embodiment and the like, in addition to the above-described advantages of preventing the set-off, the contamination of the transport unit, and the occurrence of surface printing stain, the trouble of separating and aligning the interleaving paper PA can be obtained. It is possible to automatically separate the front and back side printed paper Pb and the interleaf paper PA without performing the operation or soiling the hands of the user (operator or the like) with the ink of the print image due to the troublesome operation. It is possible to provide a new stencil type stencil printing machine 1000 having excellent operability and high convenience. In addition, when a plurality of paper feed units (the print paper feed unit 43 and the interleaf paper feed unit 44 in the first embodiment and the like) are provided and plate printing, trial printing, or normal printing is performed, the printing is performed. A required number of interleaving papers PA for initial printing as initial printing papers meeting the purpose of the above is supplied from a interleaving paper feeding unit 44 different from the printing paper feeding unit 43 for feeding the printing paper P. By feeding, the printing paper P is not wasted. (Modification of First Embodiment) A modification of the first embodiment (hereinafter, may be simply referred to as a "modification") will be described with reference to FIGS. 7, 11, and 12. FIG. This modified example is characterized in that an operation relating to a sorting mode for sorting printed sheets Pb, which have been printed on the front and back sides, finally stacked on the sheet discharge tray 71 for every predetermined number of sheets is performed.

In this modification, in addition to the operation of the first embodiment,
In order to perform the operation related to the sorting mode, the sorting mode is selected and selected as shown in FIG.
A sorting key 190 indicated by a broken line for setting is newly attached to the operation panel 11, and as shown in FIG. 12, a colored interleaf PB as a colored paper is loaded and stored, and the colored interleaf PB is stored.
Feed motor 60- which drives the paper feed means to feed
When the sorting mode is set, the interleaving paper feeding unit 47 having the sheet feeding unit 47 and the like is newly provided below the interleaving paper feeding unit 44. Front and back printed paper P re-fed from paper output tray 61
The paper feed motor 60-4 is controlled so as to feed the colored interleaf PB from the interleaf paper supply unit 47 every predetermined number of sheets b, and the interleaf separation claw 111 is driven every predetermined number of front and back printed sheets Pb. The separation claw drive motor 115 is controlled so as to discharge the colored interleaf PB in the print paper discharge direction B, and the displacing means 87 is deactivated when the colored interleaf PB is conveyed toward the discharge tray 71. The main difference is that a control device 200A shown in FIG. 11 for controlling the displacement solenoid 90 to be turned off is provided.

When setting the sorting mode and performing printing, the control device 200A determines that the apparatus is in the sorting mode setting state based on the sorting mode setting signal generated by pressing the sorting key 190. Interleaf paper feed unit 47
Is the same as that of the slip sheet feeding unit 44. The paper feed motor 60-4 is composed of a stepping motor. The drive control target means of the slip sheet feeding unit 47 includes a sheet feeding motor 60-
2 and the motor 4 of the paper feed tray moving means 41
4 and the gear motor 55 of the up-and-down movement mechanism 42 are included. For the sake of simplicity of description, the gear motor 55 and the like are collectively referred to as an interleaf paper feed drive unit 165 in FIG.

The sorting mode is set, for example, by pressing the sorting key 190 and then inserting the interleaving paper feeding section 47 for each predetermined number of front and back printed sheets Pb to be re-fed from the paper output tray 61.
, The number of sorts to be fed and sorted by the color interleaving paper PB may be set and input by the ten keys 16.

The operation of the modified example will be described focusing on the operation different from that of the first embodiment. After the operation similar to that of the first embodiment, the operator takes out the initial printed interleaf paper PA 'discharged to the paper output tray 71, confirms it, and performs the various key operations described above.
Press 0. The control device 200A determines that it is in the sorting mode setting state based on the input sorting mode setting signal, reads out the print data from the ROM 203, and displays on the message display 17 that the setting such as the number of sortings is to be performed. Done. The operator, on the other hand,
The number of sorting is set using the ten keys 16.

Thereafter, the same operation as in the first embodiment is performed.
The discharge tray 61 of the re-feed unit 9 loaded with the front and back printed sheets Pb with the interleaf paper PA interposed occupies the second displacement position P2 and stops as shown in FIG. Then, the front and back printed sheets Pb on the discharge tray 61 in the re-feeding section 9
(For example, six sheets in FIG. 10) and a slip sheet PA (for example, FIG. 1)
0, 5 sheets) are separated alternately in the print sheet discharge direction B and the insert sheet discharge direction C by the slip sheet separating claw 111 in the same manner as in the first embodiment. Then, the interleaf paper PA is discharged to the interleaf paper output tray 98 and stacked.

When the number of sorted sheets (for example, three sheets) input to the RAM 202 has been consumed, the control device 200A operates the displacement solenoid 90.
To the colored interleaf PB from the interleaf paper supply unit 47 in a state where the power supply to the
Is fed only one sheet. Then, the control device 2
At 00A, the energization and cutoff of the displacement solenoid 90 are repeated again as described above. The print data for repeating the above operation up to the number of prints input to the RAM 202 is stored in the ROM 2.
03, the unprinted colored interleaving paper PB is inserted between the groups to be sorted, which are composed of a plurality of front and back printed sheets Pb, as shown in FIG. It is possible to sort printed paper without using it. Further, by using the colored interleaving paper PB as the interleaving paper, the visibility of the sorting is improved, so that clear sorting can be performed. (Embodiment 2) Embodiment 2 will be described. The second embodiment differs from the first embodiment in that the control device 200
Having a control device 200B shown in FIG.
The interleaf separation claw 111 has a function of alternately separating and discharging the front-printed paper Pa fed by the re-feed unit 9 in the print paper discharge direction B and the interleaf PA in the interleaf discharge direction C. , And the reverse transport means feeds the back surface of the front-printed paper Pa discharged in the print paper discharge direction B by the interleaving paper PA for initial printing and the interleaving paper separating claw 111 fed by the re-feeding unit 9 to the printing drum 26. The main difference is that it has a function of reversing and conveying the front-printed paper Pa so as to face the paper.

As shown in FIG. 8, the control device 200B
A microcomputer having a configuration similar to that of the control device 200 is provided. CPU 201 of control device 200
Are electrically connected to the various keys and sensors of the operation panel 11 through the input ports, respectively. The ON / OFF signals and the like are output from the various keys and the various sensors. Receive a data signal. The CPU 201 of the control device 200B is electrically connected to the operation panel 11, the respective motors and the solenoids, or the respective drive control target units, respectively, through the output ports. Various command signals are transmitted to the above-mentioned various motors and solenoids or the above-mentioned respective drive control target devices via not shown).

The ROM 203 stores programs, data, and the like for executing operations unique to the second embodiment. The RAM 202 has functions substantially similar to those of the first embodiment. Note that the CP of the control device 200B in the second embodiment
Strictly speaking, the CPU 201 of the control device 200B in the first embodiment
1. Although the functions are different from those of the ROM 203 and the RAM 202, the control device 200 is generally referred to in order to simplify the description.
Only distinguished as B.

In the second embodiment, the control device 200B
The PU 201 (hereinafter sometimes simply referred to as “control device 200B”) has well-known calculation / calculation functions and control functions, and also has the following various control functions. Control device 200
B is a function as an operation control unit similar to that of the control device 200, that is, an initial printing mode supplied by the paper supply unit of the interleaf paper supply unit 44 when an initial print mode is set and printing is performed. When the printing is performed by setting the displacement solenoid 90 to turn on the displacement means 87 to operate the displacement means 87 for the interleaving paper PA, the paper is fed by the paper feeding means of the printing paper feeding unit 43. The displacement solenoid 90 is turned on to operate the displacement means 87 for the printing paper P, and the displacement means 87 is moved to the slip sheet PA fed by the sheet feeding means of the slip sheet feeding section 44. The displacement solenoid 90 is turned off to make it inactive.

When the duplex printing mode is set, the control device 200B sets the first paper feed tray 61
A slip sheet PA for initial printing is predetermined on the uppermost part of the front-surface-printed sheet Pa on the upper side (in the second embodiment, on the discharge tray 61 occupying the first displacement position P1 in the first sheet discharge unit 6). In order to feed the number of sheets (one sheet in the second embodiment), the sheet feeding motor 6 is operated to operate the sheet feeding unit of the slip sheet feeding unit 44.
After control of 0-2, the interleaving paper PA for initial printing transported by the intermediate transport roller pair 93 via the reverse transport path 99 is placed on the discharge tray 71, and the front-printed paper Pa is placed on the first displacement position P1. When the sheet is conveyed toward the paper discharge tray 61 occupying the sheet, the displacement solenoid 90 is turned on so as to actuate the displacement means 87 to print on the back side of the interleaving paper PA for the initial printing and the back side of the paper Pa on the front side. It has a function to do. When the control device 200B sets the initial print mode to perform printing, sets the slip sheet mode to perform printing, and sets the double-sided printing mode, the control device 200B It is determined that the printer is in a setting (printing mode setting in the second embodiment) state, a slip sheet mode setting state, or a duplex printing mode setting state.

The control device 200B operates as follows:
a ′ and the paper Pb on which the front and back sides have been printed are discharged to the paper discharge tray 71 by the paper discharge transport unit 50 at the second paper discharge position HP.
The unit has a function of controlling the unit drive motor 123 of the sheet discharge conveyance drive unit 50A so as to occupy 2 units. In addition, the control device 200B sets the paper discharge transport unit 50 to the first paper discharge position H in order to discharge the front surface printed paper Pa to the paper discharge tray 61.
It has a function of controlling the unit drive motor 123 of the paper discharge transport drive unit 50A so as to occupy P1.

Next, the operation of the second embodiment will be described focusing on differences from the operation of the first embodiment. Embodiment 2
The outline of the operation is that the operation related to the plate printing mode is performed as the operation related to the initial printing mode, and then the operation related to the slip sheet mode is performed while performing the single-sided printing process. The operation related to the plate printing mode is performed as the operation related to the initial print mode, and then the double-sided printing process is performed. The operation of the second embodiment is as follows.
Compared to the operation of the first embodiment, after the operation related to the initial print mode related to the double-sided printing process after the completion of the single-sided printing process, the control device 200 </ b> B Controlling the interleaf claw drive motor 115 so as to alternately separate and discharge the fed front surface printed paper Pa in the print paper discharge direction B and the interleaf paper PA in the interleaf discharge direction C; The means is arranged so that the back side of the front-printed paper Pa discharged in the print paper discharge direction B by the interleaving paper separation pawl PA for initial printing fed by the re-feeding unit 9 and the printing paper discharge direction B faces the printing drum 26. The driving motor of the pair of intermediate conveyance rollers 93 and the pair of registration rollers 45a,
The main difference is that the drive motor 45b is controlled and that the operation relating to the slip sheet mode is not performed in the duplex printing process.

In the second embodiment, as in the first embodiment, it is assumed that, for example, two originals A and B are set on the original receiving table 1a of the original reading unit 1 in FIG. In the same manner as in the first embodiment, from the image reading of the second document B, the plate-printing master 21a perforated in accordance with the image of the document B to perform the plate printing and the one-side printing with the operation in the slip sheet mode. By the operation up to the process printing, the printing and the paper passing operation in which the paper P and the interleaf paper PA are alternately fed, and the respective processes of the paper discharge are repeated by the set number of prints, and the upper and lower surfaces are repeated. In a mode in which the unprinted interleaf paper PA is inserted between the printed paper Pas, in other words, the front-printed paper Pa and the unprinted interleaf paper PA are alternately discharged and stacked on the discharge tray 61 sequentially. Finally, as shown in FIG. 9, on the top of the front-surface printed paper Pa on the paper output tray 61, an interleaf paper PA for initial printing related to the duplex printing process is provided.
Are loaded.

Next, in the same manner as in the first embodiment, a plate discharging process for discharging the plate-making master 21a is performed, and from the image reading of the first document A, the plate making perforated corresponding to the image of the document A is performed. When the operator presses the start key 14 of the operation panel 11 after the confirmation printing of the removal of the initial printed interleaf paper PA 'discharged to the paper discharge tray 71 by the operator, the printing is performed by the completed master 21b up to the plate printing. Insertion paper separating claw 1 according to the first embodiment
11, an operation different from that in which both the front surface printed paper Pa and the interleaf paper PA are discharged in the print paper discharge direction B is performed.

That is, by operating the paper feed motor 60-3, the top surface printed paper Pa on the paper output tray 61 occupying the second displacement position P2 is separated and fed one sheet. When the operation is performed, the separation claw driving motor 115 is driven in the same manner as in the first embodiment by a command from the control device 200B.
Is controlled so that the interleaf separation claw 111 swings to the refeeding displacement position shown by the solid line in FIG.
2 is separated and conveyed from the paper re-feeding direction E to the printing paper discharge direction B, and is conveyed by the intermediate conveying roller pair 93 when passing through the reversing conveyance path 99 while being turned over. Then, by the same operation as in the first embodiment, the printing unit 1 is rotated by the registration roller pairs 45a and 45b in synchronization with the rotation of the printing drum 26.
0 and is fed between the printing drum 26 and the press roller 28. At this time, the paper sensor 35 outputs a signal when the leading end of the interleaf paper PA crosses the paper sensor 35,
This signal is input to the RAM 202. The signal input to the RAM 202 is collated with the print data stored in the ROM 203 by the CPU 201, and based on the print data, a signal is sent from the CPU 201 to energize the displacement solenoid 90 shown in FIG.

When the displacement solenoid 90 is energized, by the same operation as described above, the press roller 28 presses the outer surface of the press-pressed master 21b on the print drum 26 against the back surface of the front-printed paper Pa. Displace to position. A prepressed master 2 in which a press roller 28 is wound around the outer peripheral surface of a print drum 26 via a front surface printed paper Pa
1b, the prepressed master 21 is pressed.
b is pressed against the back side of the front side printed paper Pa, and the ink is transferred from the inner peripheral surface of the printing drum 26 to the back side of the front side printed paper Pa through the perforated portion of the plate-making master 21b. A corresponding print image is formed and transferred. The initial printed interleaf paper PA 'on which the print image corresponding to the original A is transferred is separated from the separation claw 34 moved to the separation position.
Is separated from the printing drum 26 by the
At 0, the sheet is discharged to the sheet discharge tray 71 by the sheet discharge conveyance unit 50 which is swung and held at the second sheet discharge position HP2. Then, the operator takes out the interleaved paper PA ', which has been initially printed onto the paper output tray 71, checks it, and when it is OK, presses the start key 14 of the operation panel 11.

After the discharge of the top-most first front and back printed sheet Pb on the discharge tray 61 is completed, the second interleaving sheet PA from the top is separated by the paper feeding means and one sheet is fed. Is done.
At this time, the separation claw drive motor 115 is controlled by the command from the control device 200 so that the slip sheet separation claw 111 swings to the slip sheet displacement position shown by the two-dot chain line in FIG. The slip sheet PA conveyed to the path 112 is conveyed while being guided by the slip sheet guide plate 114 from the re-feed direction E to the slip sheet discharge direction C, and is discharged to the slip discharge tray 98.

Hereinafter, the discharge tray 61 in the re-feeding section 9
The upper surface printed paper Pa and the interleaf paper PA are alternately separated in the print paper discharge direction B and the interleaf paper discharge direction C by the interleaf separation claw 111 as described above. The interleaf paper PA is discharged and stacked on the interleaf paper discharge tray 98 on the tray 71, respectively.

The present invention is not limited to the above-described second embodiment.
When it is desired to check the print image by trial printing at any time, the configuration may be the same as that of the first embodiment. Further, in the above-described second embodiment and the like, an example in which only one interleaf paper PA for initial printing is fed to perform plate printing is described. You may.

Therefore, according to the second embodiment and the like, in addition to the advantage of preventing the set-off and the contamination of the transport unit as described above, it is also possible to perform a troublesome operation of separating and aligning the slip sheet PA. It is possible to automatically separate the front and back side printed paper Pb and the interleaf paper PA without soiling the user's hand with the ink of the printed image due to this troublesome operation, and the convenience is excellent in operability. A high new stencil printing machine 1000 can be provided. In addition, it has a plurality of paper feeding units,
When performing printing on a plate, trial printing, or normal printing, a printing paper feeder for feeding a required number of sheets of interleaf paper PA as initial printing paper suitable for the purpose of the printing to the printing paper P. By feeding the paper from the interleaf paper feeding unit 44 different from the unit 43, the printing paper P is not wasted. Further, according to the second embodiment and the like, although the advantage of preventing the occurrence of surface printing stain as in the first embodiment and the like cannot be obtained, since the operation relating to the slip sheet mode is not performed in the double-sided printing process, the total printing is not performed. The time can be shorter than in the first embodiment. (Modification 1 of Embodiment 2) Modification 1 of Embodiment 2 (hereinafter sometimes referred to as “Modification 1”) is added to the configuration of Embodiment 2 when the double-sided printing mode is set. The thermal head 23 as a means is configured to determine the perforation diameter of the master 21 used when printing on the back surface of the interleaf paper PA for initial printing and the front surface printed paper Pa and the master 21 used when printing on the front surface of the printing paper P. It is characterized in that it is smaller than the perforation diameter.

In the first modification, when the duplex printing mode is set, the thermal head 23
In order to make the perforation diameter of the master 21 used for printing on the back side of the A and the front side printed paper Pa smaller than the perforation diameter of the master 21 used for printing on the front side of the printing paper P, for example, Japanese Patent Laid-Open No. The same configuration and means as the technology described in Japanese Patent No. 52515 can be used.
That is, a print image (ink image) when printing on the back surface of the interleaf paper PA for initial printing and the back surface of the front surface printed paper Pa
The print density setting key 1 described in JP-A-7-52515 as a print density setting means for setting the print density and the perforation energy supplied to the individual heating elements of the thermal head 23 are Print density setting key 1
By adding the microprocessor 2 described in the above publication as a perforation energy adjusting means for adjusting the energy to a predetermined value according to the print density set by The print density when printing on the back side of the paper PA and the front side printed paper Pa is variable. That is, in the first modification, the master 21 used when printing on the back side of the interleaf paper PA for initial printing and the back side of the front side printed paper Pa. In order to make the perforation diameter smaller than the perforation diameter of the master 21 used when printing on the surface of the printing paper P, the print density setting key 1 may be appropriately operated to set the print image density in a direction of decreasing the print image density. . Here, the print density setting key 1 is attached to the operation panel 11, and the microprocessor 2 is connected to the CP of the control device 200B.
What is necessary is just to be configured to transmit and receive with U201 and to receive the output signal from the print density setting key 1.

Since the first modification can be easily implemented by the above-described configuration, further description will be omitted. Therefore, according to the first modification, it is possible to obtain the same advantage of preventing the occurrence of surface printing stains as in the first embodiment and the like that cannot be obtained in the second embodiment and the like. Is not performed, the total printing time can be shortened compared to the first embodiment. (Modification 2 of Embodiment 2) Modification 2 of Embodiment 2 (hereinafter, sometimes referred to as “Modification 2”) is added to the configuration of Embodiment 2 when the double-sided printing mode is set. The thermal head 23 as a means sets the perforation diameter of each master 21 used when performing printing by setting the double-sided printing mode to only one of the front and back surfaces of the interleaving paper PA for initial printing and the printing paper P. When printing, in other words, it is characterized in that it is smaller than the perforated diameter of the master 21 used when only one-sided printing is performed.

In the second modification, when the two-sided printing mode is set, the thermal head 23 sets the perforated diameter of each master 21 used when the two-sided printing mode is set to perform printing when only one-sided printing is performed. In order to make the hole diameter smaller than that of the master 21 to be used, for example, Japanese Patent Application Laid-Open No. 7-5251
The same configuration and means as the technology described in Japanese Patent Publication No. 5 can be used. That is, the print density described in JP-A-7-52515 as a print density setting means for setting the print density of an interleaf paper PA for initial printing and a print image (ink image) for duplex printing. The above publication as a perforation energy adjusting means for adjusting a setting key 1 and perforation energy supplied to individual heating elements of the thermal head 23 to a predetermined energy according to a print density set by the print density setting key 1. Is added to the configuration of the second embodiment to print the print image when printing on the interleaf paper PA for the initial printing, the front surface of the printing paper P, and the back surface of the front surface printed paper Pa. When the density is variable, that is, in the second modification, the double-sided printing mode is set and printing is performed, the perforation diameter of each master 21 is set to a value for initial printing. PA, in order to be smaller than the perforation diameters of the master 21 used when performing only single-sided printing, the print density setting key 1 may be set to the appropriate operation to print the image density is reduced direction.

Since the second modification can be easily implemented by the above-described configuration, further description is omitted. Therefore, according to the modified example 2, it is possible to obtain the same advantage of preventing the occurrence of surface printing stains as in the first embodiment and the like that cannot be obtained in the second embodiment and the like. Is not performed, the total printing time can be shortened compared to the first embodiment.

The present invention is not limited to the second modification, but applies the specific means of the second modification to the following printing apparatus,
Obviously, the transfer section can be prevented from being stained and the surface printing stains can be prevented. That is, a rotatable printing drum around which a master is wound, pressing means for pressing printing paper against the master on the printing drum, plate making means for forming a perforation in the master by forming a perforation, and a feeding means for feeding printing paper. In a printing apparatus comprising a paper device and capable of performing an operation relating to a double-sided printing mode for printing on the front and back sides of a printing paper, the plate making means sets a double-sided printing mode and performs printing. The printing apparatus is characterized in that the perforated diameter of each master used for printing is smaller than the perforated diameter of the master used when printing only on one of the front and back surfaces of the printing paper (see claim 14). (Modification 3 of Embodiment 2) Modification 3 of Embodiment 2 (hereinafter sometimes referred to as “Modification 3”) is added to the configuration of Embodiment 2 and a duplex printing mode is set. When printing on the back side of the front-side printed paper Pa fed in the printing paper discharge direction B by the paper feeding unit 9, the re-feeding unit 9 is operated at a predetermined interval while the print drum 26 is rotating, and the front side is printed. It has a drum idle rotation intermittent paper feed control means for controlling the re-feed drive section 180 so as not to feed the paper Pa and turning off the displacement solenoid 90 so as to deactivate the displacement means 87. Is what you do.

In the third modified example, the drum idle rotation intermittent sheet feeding control means having the control function is described in, for example,
A configuration / means having a control means (control unit 12 shown in FIG. 1 of Japanese Unexamined Patent Publication No. Hei 3-193383) similar to the technique described in JP-A-193383 can be used. That is, Modification 3 is added to the configuration of Embodiment 2 as an input unit that can set the supply interval of the front-surface-printed paper Pa from the re-feeding unit 9 regardless of the rotation speed of the print drum 26. JP-A-3-19.
No. 3,383, the skip key 14;
It includes the drum idle rotation intermittent paper feed control means as control means for controlling the supply of the front side printed paper Pa based on the set value input by the skip key 14. Here, the skip key 14 is operated on the operation panel 1.
1 and a control function as the drum idling intermittent sheet feeding control means may be added to the control device 200B.

For example, when the skip number (set value) is set to 1/3 by the skip key 14 as shown in FIG. 1 of Japanese Patent Laid-Open No. 3-193383, the drum idle rotation intermittent supply is performed. Under the instruction from the paper control means, the first surface-printed paper Pa below the uppermost initial printing slip sheet P shown in FIG. 9 of the second embodiment is fed and printed. After a series of operations similar to the above-described operation of discharging the paper is completed, the next second surface-printed paper Pa is fed after the print drum 26 idles twice. In this way, the operations such as printing, idle rotation, idle rotation, printing, idle rotation, idle rotation...
a is fed one sheet. Further, if an arbitrary number N is set and input using the numeric keypad 16 of the operation panel 11, the surface-printed paper P per N rotations of the print drum 26 can be set.
a can be fed one sheet. In addition, Japanese Unexamined Patent Publication No.
In the same manner as described in JP-A-193383, it is of course possible to set not the number of rotations of the printing drum 26 but the printing interval itself.

Modification 3 can be easily implemented with the above-described configuration and an operation example involving intermittent (skip) sheet feeding, and therefore, further description will be omitted. Therefore, according to the third modification, it is possible to obtain the same advantage of preventing the occurrence of surface printing stains as in the first embodiment and the like that cannot be obtained in the second embodiment and the like. (Modification 4 of Embodiment 2) Modification 4 of Embodiment 2 (hereinafter sometimes referred to as "Modification 4") is a modification of the configuration of Embodiment 2 in which a double-sided printing mode is set and printing paper is set. P
When printing is performed on the front and back surfaces of the printing paper P, and when printing is performed on the front surface of the printing paper P fed by the printing paper feeding unit 43, the printing paper feeding is performed at a predetermined interval while the printing drum 26 is rotating. The printing paper feed driving unit 170 is controlled so that the paper unit 43 is not fed with the printing paper P, and the displacement solenoid 90 is operated so that the displacement means 87 is deactivated.
Is turned off, and when printing is performed on the back side of the front-side printed paper Pa fed in the printing paper discharge direction B by the re-feeding unit 9, the re-feeding unit 9 is provided at a predetermined interval while the print drum 26 is rotating. To control the re-feed driving unit 180 so as not to feed the paper Pa on which the front surface has been printed.
The present invention is characterized in that it has a drum idle rotation intermittent paper feed control means for turning off the displacement solenoid 90 so as to deactivate the drum.

In the fourth modified example, in addition to the operation according to the third modified example, under the instruction from the drum idle rotation intermittent sheet feeding control means,
When printing is performed on the front and back surfaces of the printing paper P by setting the duplex printing mode, and when printing is performed on the front surface of the printing paper P fed by the printing paper feeding unit 43, the rotation of the printing drum 26 is performed. At a predetermined interval, a displacement solenoid is controlled so that the printing paper feeding unit 43 controls the printing paper feeding driving unit 170 so as not to feed the printing paper P, and deactivates the displacement means 87. It merely adds that the 90 is turned off. Therefore, Modification 4 can be easily implemented with the above-described configuration and an operation example involving intermittent (skip) sheet feeding, and further description will be omitted. Therefore, according to the fourth modification, it is possible to obtain the same advantage of preventing the occurrence of surface printing stains as in the first embodiment and the like that cannot be obtained in the second embodiment and the like. (Embodiment 3) Embodiment 3 will be described. The third embodiment is different from the second embodiment in that the control device 200
B, a control device 200C shown in FIG. 14 is used to perform only one-sided printing, the double-sided printing key 13 is removed from the operation panel 11, and the reversing conveyance unit is fed by the re-feeding unit 9. Surface printed paper P such that the back surface of the printed front surface printed paper Pa faces the print drum 26.
The main difference is that it has a function of reversing and conveying a.

As shown in FIG. 14, the control device 200C includes a microcomputer having a configuration similar to that of the control device 200. CPU 2 of control device 200
01 is electrically connected to the various keys and sensors except the double-sided printing key 13 of the operation panel 11 through the input port, respectively, except for the double-sided printing key 13. An on / off signal and a data signal are received from various keys and the various sensors. The CPU 201 of the control device 200 is electrically connected to the operation panel 11, the respective motors and the solenoids, or the respective drive control target units through the output ports, respectively, as described above. Various command signals are transmitted to the above-mentioned various motors and solenoids or the above-mentioned respective drive control target devices via not shown).

The ROM 203 stores programs, data, and the like for executing operations unique to the third embodiment. The RAM 202 has functions substantially similar to those of the second embodiment. Note that the CP of the control device 200C in the third embodiment
Strictly speaking, the CPU 201 of the control device 200B in the second embodiment
1. Although the functions are different from those of the ROM 203 and the RAM 202, the control device 200 is generally referred to in order to simplify the description.
Only distinguished as C.

In the third embodiment, C of the control device 200C
The PU 201 (hereinafter, sometimes simply referred to as “control device 200C”) has well-known calculation / calculation functions and control functions, and also has the following various control functions.

The control device 200C functions as an operation control unit similar to the control device 200B, that is, when the initial print mode is set and printing is performed, the sheet is fed by the sheet feeding unit of the slip sheet feeding unit 44. The displacement solenoid 9 is operated to operate the displacement means 87 for the interleaf paper PA for initial printing to be performed.
When the printing operation is performed by setting the intermediation mode to ON and setting the interleaving mode, the displacement solenoid is operated to actuate the displacement means 87 with respect to the printing paper P fed by the paper feeding means of the printing paper feeding unit 43. 90 is turned on and the slip sheet feeding section 44 is turned on.
The displacing solenoid 90 is turned off so as to deactivate the displacing means 87 for the slip sheet PA fed by the paper feeding means.

The control device 200C conveys the front-printed sheet Pa, which has been reversed and transported by the intermediate transport roller pair 93 via the reverse transport path 99, toward the discharge tray 61 occupying the first displacement position P1. In this case, the displacement solenoid 90 has a function of turning off the displacement solenoid 90 so as to deactivate the displacement means 87 so that printing is not performed on the back surface of the front surface printed paper Pa.

The control device 200C sets the initial print mode and sets the initial print mode in the same manner as the control device 200B (set in this embodiment) when performing printing by setting the slip sheet mode. In step 3, it is determined that the printer is in the printing / printing mode setting state and the slip sheet mode setting state.

The control device 200C operates as follows.
In order to discharge the front-printed sheet Pa reversed and conveyed by the intermediate conveyance roller pair 93 through the a ′ and the reverse conveyance path 99 to the discharge tray 71, the discharge conveyance unit 50 sets the second discharge position HP2. The paper discharge transport drive unit 50 is occupied.
A has a function of controlling the unit drive motor 123 of FIG. The control device 200C also controls the front-side printed paper Pa
Paper discharge unit 50 to discharge the paper to the paper discharge tray 61.
Has a function of controlling the unit drive motor 123 of the sheet discharge conveyance drive unit 50A so as to occupy the first sheet discharge position HP1.

Next, the operation of the third embodiment will be described focusing on differences from the operation of the second embodiment. Embodiment 3
The outline of the operation is that the operation relating to the plate printing mode is performed as the operation relating to the initial print mode, and then the operation relating to the slip sheet mode is performed while performing the single-sided printing process. The operation of the third embodiment is different from the operation of the second embodiment mainly in that the two-sided printing process is not performed after the one-sided printing process.

Also in the third embodiment, it is assumed that, for example, two originals A and B are set on the original receiving table 1a of the original reading unit 1 in FIG. In the same manner as in the second embodiment, from the image reading of the second document B, the plate printing by the perforated master 21a that has been perforated according to the image of the document B is performed.

Next, the operator takes out the initial printed interleaf paper PA 'discharged to the paper output tray 71, confirms it, and when it is OK, sets the number of prints with the ten keys 16 on the operation panel 11, and presses the interleaf key 12 And then press the start key 14. Then, substantially in the same manner as in the second embodiment, the operation up to the one-sided printing process printing involving the operation in the slip sheet mode allows printing and sheet passing operations in which the sheet P and the slip sheet PA are alternately fed, And each step of paper ejection is repeatedly performed for the set number of printed sheets, and the unprinted slip sheet PA is inserted between the upper and lower front printed paper Pa, in other words, the front printed paper Pa and the unprinted paper Pa are not inserted. The interleaving paper PA for printing is sequentially discharged and stacked on the discharge tray 61 alternately.
(To be described with reference to FIG. 9, this corresponds to a state in which there is no interleaving paper PA for initial printing related to the double-sided printing process placed on the uppermost surface of the paper discharge tray 61). ).

Next, without performing the plate discharging step of discharging the plate-making master 21a related to the double-sided printing step as in the second embodiment and the image reading of the first original A, the sheet is discharged onto the sheet discharging tray 61. Top-side printed surface paper P
a is separated and fed, and the front-surface-printed paper Pa is printed from the re-feed direction E by the slip-sheet separating claw 111 swinging to the re-feeding displacement position shown in FIG. 5 according to a command from the control device 200C. The sheet is separated and transported in the sheet discharge direction B. And
While passing through the reversing conveyance path 99, the sheet is conveyed by the pair of intermediate conveyance rollers 93, and is turned over by the reversing conveyance path 99. However, at this time, since the current is not supplied to the displacement solenoid 90 shown in FIG. The sheet is conveyed to the sheet discharge tray 71 by the sheet discharge conveyance unit 50 that is rocked and held at the sheet discharge position HP2.

After the discharge of the first uppermost surface-printed paper Pa on the paper output tray 61 is completed, the second interleaving paper PA from the top is separated by the paper feeding means and one paper is fed. Is done.
At this time, the slip sheet PA conveyed to the re-feeding path 112 is moved from the re-feed direction E by the slip sheet separating claw 111 swinging to the slip sheet displacement position shown in FIG. The sheet is conveyed in the slip sheet discharge direction C and discharged to the slip sheet discharge tray 98.

Hereinafter, the discharge tray 61 in the re-feeding section 9
The upper surface printed paper Pa and the interleaf paper PA are alternately separated in the print paper discharge direction B and the interleaf paper discharge direction C by the interleaf separation claw 111 as described above. The interleaf paper PA is discharged and stacked on the interleaf paper discharge tray 98 on the tray 71, respectively.

The third embodiment is not limited to the third embodiment.
When it is desired to check the print image by trial printing at any time, the configuration may be the same as that of the first embodiment. Further, in the above-described third embodiment and the like, the example in which only one sheet of interleaf paper PA for initial printing is fed to perform plate printing is described. However, the present invention is not limited to this. You may.

Therefore, according to the third embodiment and the like, in addition to the advantage that set-off as described above can be prevented, complicated operations such as separation and alignment of the slip sheets PA are performed, and this troublesome operation is performed. With this, the paper Pa and the interleaf paper PA, which have been printed on the front side, can be automatically separated without soiling the hands of the user (operator, etc.) with the ink of the print image, and a new convenient and excellent operability. A stencil-type stencil printing machine 1000 can be provided. In addition, it has a plurality of paper feeding units,
When performing printing on a plate, trial printing, or normal printing, a printing paper feeder for feeding a required number of sheets of interleaf paper PA as initial printing paper suitable for the purpose of the printing to the printing paper P. By feeding the paper from the interleaf paper feeding unit 44 different from the unit 43, the printing paper P is not wasted.

The embodiment of the present invention is not limited to the third embodiment. As shown in FIG. 9, the interleaving paper PA for initial printing related to the double-sided printing process placed on the uppermost surface of the paper discharge tray 61 is used. Instead, the slip sheet PA for preventing the transport section from being stained is placed in the discharge tray 6.
The paper may be fed and controlled from the slip sheet feeding unit 44 so as to be placed on the uppermost surface of the first sheet.

Although the description will be made before and after, the modified examples of the first embodiment shown in FIGS. 7, 11 and 12 are added to the second embodiment, the modified examples 1 to 4 and the third embodiment and the like. Can be applied.

The embodiment of the present invention is the same as the first embodiment.
The present invention is not limited to the first to third embodiments and the first to fifth modifications, but may be applied to a printing apparatus or the like that does not need to perform an operation related to the initial print mode using a predetermined number of slip sheets PA for initial printing ( Refer to claims 1 to 10). Examples of the configuration and operation of the printing apparatus that does not require the operation related to the initial print mode include the interleaf paper feeding unit 44 or the interleaving paper feeding unit 44 from the configurations and operations of the first to third embodiments and the first to fifth modifications. The interleaving paper PA for initial printing is fed from the re-feeding unit 9, and the displacement unit 87 is moved to the interleaving paper PA for initial printing fed by the interleaving paper feeding unit 44 or the re-feeding unit 9. In addition to removing the function as the control means for turning on the displacement solenoid 90 so as to operate, the description relating to the “initial printing interleaf paper PA” and the “initial printed interleaf paper PA ′” is deleted. Can be easily implemented.
Further description is omitted.

As an example of such a printing apparatus, for example, when a new plate-making master is wound around a printing drum and printing is started, the printing operation is not performed many times, and In order to eliminate poor print image rise when resuming printing by winding a new plate-making master on a print drum at a low temperature or after leaving it for a long time,
The unprinted master is wound around the printing drum, and without passing the paper, the unprinted master is pressed by a pressing means such as a press roller to perform blank printing many times. 2. Description of the Related Art A printing apparatus using an ink replenishing roller called a nurse roller for the purpose of obtaining a printed image from the first sheet to obtain a good printed matter is exemplified. As a printing apparatus using such an ink replenishing roller, for example, a technique described in Japanese Patent Application Laid-Open No. 4-296585 and Japanese Patent Application Laid-Open No. 11-180026 proposed by the present applicant is mentioned.

The embodiment of the present invention is the same as the first embodiment.
The configuration and functions of all the components and the control devices 200 to 200C described in Embodiments 1 to 3 and Modifications 1 to 5 are not limited to those described in Embodiments 1 to 3 and Modifications 1 to 5 and the like. All the components and the control device 20 described in the first to third embodiments and the first to fifth modifications.
It may be configured by a combination of two or more of 0 to 200C (refer to Claims 11 to 13, the first to tenth technical configurations). What has been described above can be similarly configured in a printing apparatus or the like that does not perform an operation related to the initial print mode using a predetermined number of slip sheets PA for initial printing (see claims 1 to 10). .

The embodiment of the present invention is the same as the first embodiment.
Body part 500, not limited to
A paper feeding device for feeding the printing paper P or a slip sheet feeding device for feeding the slip sheet PA may be provided on the side. For example, the body 50
When the paper feeding device is arranged above the interleaf discharge tray 98 on the 0 side, it can be arranged near the pair of registration rollers 45a and 45b. In addition to the standard paper (plain paper), a suitable design can be made from the layout as a device for feeding drawing paper, postcards, envelopes, and the like as thick paper.

Note that the embodiment of the present invention is not limited to the above-described first to third embodiments and the first to fifth modifications, and the discharge tray 71 and the suction switching moving means 120 are not necessarily required. The advantage that the printed image of the paper PA 'is easy to check, that the legitimate printed matter can be prevented from being confused with the incomplete printed matter, and that the double-sided printing is continuously performed over a plurality of pages of the document. If there is no need to improve the operability of taking out the printed material from the paper discharge tray 71 in the above case, it may be omitted. That is,
It can be said that it is only necessary to have a paper discharge tray (for example, one paper discharge tray 61) on which the printed paper and the discharged interleaf are stacked (see claims 1 and 11).

The printing paper P is not limited to Embodiments 1 to 3 and Modifications 1 to 5 as described above, and if it is acceptable to waste printing paper P as in the conventional case, the printing paper P may be used for initial printing. After the paper P (printing paper or test printing paper) is used and the initially printed printing paper P is discharged to the first discharge tray 61 instead of the second discharge tray 71,
The re-feeding unit that interposed the discharged interleaving paper PA, the front and back printed paper Pb or the front printed paper Pa, and the discharged initial printed paper P is moved to the second displacement position P2 and re-fed. When paper is formed, it is also possible to configure and operate as follows.

That is, as a first example, an operation relating to the initial print mode can be performed by using a predetermined number of front and back printed sheets Pb as sheets for initial printing.
After setting the initial print mode as described above, the separation claw drive motor 115 is operated so that the separation paper separation claw 111 discharges the paper for initial printing composed of the front and back printed paper Pb in the separation paper discharge direction C. Is controlled. As a second example, it is possible to perform an operation related to the initial print mode by using a predetermined number of front-printed paper Pa as the paper for the initial print, and set the initial print mode as described above. After that, the interleaving paper separating claw 111 is
The separation claw drive motor 115 is controlled so as to discharge the paper for the initial printing composed of in the slip sheet discharge direction C.
Further, in the first example or the second example, the re-feeding unit feeds the front and back printed paper Pb or the front printed paper Pa stacked on the first discharge tray 61 from the lowermost side. A bottom feeding unit for feeding is used. As an example of the paper feeding device for feeding from the lowermost side in this way, for example, there is a paper feeding unit 40 of the paper discharge unit 9 described in FIG. 1 of Japanese Patent Application No. 11-175348 proposed by the present applicant. Can be.
In this way, for example, front / rear printing can be performed on the lowermost printing sheet of the first discharge tray 61 using the printing paper P without using the slip sheet PA as the printing sheet. Unnecessary plate-printed printing paper is separated by the slip-sheet separating claw 111 and discharged to the slip-paper discharge tray 98.

As described above, the present invention has been described with respect to the specific embodiments and the modified examples or the examples included therein. However, the configuration of the present invention is not limited to the above. Those skilled in the art will appreciate that various embodiments and examples can be configured in accordance with the necessity, purpose, application, and the like, within the scope of the present invention, by appropriately combining these or singly. it is obvious.

[0189]

As described above, according to the present invention, a new printing apparatus can be provided by solving the above-mentioned conventional problems. The effects of each claim are as follows. According to the first aspect of the present invention, when printing is performed by setting the slip sheet mode, the displacing means is operated with respect to the printing paper fed by the sheet feeding device, and the printing paper is fed by the slip sheet feeding device. Operation control means for disabling the displacement means with respect to the interleaf fed, a re-feeding device capable of feeding the printed paper and the interleaf loaded on the paper output tray, And a slip sheet separating means for separating and discharging the printed sheet fed from the paper device in the print sheet discharge direction and the slip sheet fed from the re-feeding device in the slip sheet discharge direction. As a result, it is possible to suppress set-off, contamination of the transporting section, and generation of surface printing stains, and perform troublesome operations such as slip sheet separation and paper alignment, and a user's hand due to the troublesome operations. With printed paper without soiling the printed image with ink. Since it is possible to automatically separate and discharge the paper, the higher usability improves operability.

According to the second aspect of the present invention, when the double-sided printing mode is set and the reverse-printing means conveys the front-printed paper toward the discharge tray, the reverse of the front-printed paper is set. Activate the displacement means to print on
When the slip sheet is conveyed toward the discharge tray, the displacing means is deactivated, and thereafter, the re-feeding device is used to feed the front and back side printed sheets interposed with the slip sheet again, By having a control means for alternately discharging the front and rear printed sheets in the printing paper discharge direction and the interleaving paper in the slip sheet discharge direction by using the slip sheet separating means, set-off, soiling of the conveying unit and the front side. It is possible to prevent the occurrence of printing stains, and to perform the troublesome operation of separating and aligning the slip sheets, and to prevent the user's hands from being stained with the ink of the printed image due to the troublesome operation, and to prevent the surface and Since the back side printed paper and the slip sheet can be automatically separated and discharged, the operability is improved and the convenience is improved.

According to the third aspect of the present invention, when the double-sided printing mode is set and the reverse-printing means conveys the front-printed paper toward the discharge tray, the reverse of the front-printed paper is set. By having a control means for operating the displacement means for printing on the paper, it is possible to prevent the occurrence of set-off and the contamination of the transport unit,
It is possible to automatically separate and discharge the front-printed paper and the interleaving paper without performing the cumbersome operation of paper alignment or the user's hands becoming dirty with the ink of the printed image due to this cumbersome operation. As a result, operability is improved and convenience is also improved.

According to the fourth aspect of the present invention, when the double-sided printing mode is set, the plate making means prints, on the front side of the printing paper, the diameter of the perforation of the master used when printing on the back side of the front side printed paper. By making the perforation diameter smaller than that of the master used in some cases, it is possible to prevent the occurrence of surface printing stains in addition to the effect of the third aspect of the invention.

According to the fifth aspect of the present invention, the plate making means prints the perforated diameter of each master used when performing printing by setting the double-sided printing mode on only one of the front side and the back side of the printing paper. By making the diameter smaller than the hole diameter of the master used when performing the above, it is possible to reliably prevent the occurrence of the set-off and the contamination of the conveying portion, which are the effects of the invention of claim 3, and also prevent the occurrence of surface printing stains. Can be.

According to the sixth aspect of the present invention, when the duplex printing mode is set and printing is performed on the back side of the front side printed paper fed in the printing paper discharge direction by the re-feeding device, the rotation of the printing drum is performed. 4. The apparatus according to claim 3, further comprising a drum idle rotation intermittent paper feed control means which does not feed the surface-printed paper by the re-feeding device at a predetermined interval and does not operate the displacement means. In addition to the effects of the invention, it is possible to prevent the occurrence of surface printing stains.

According to the seventh aspect of the present invention, when the printing is performed on the front and back surfaces of the printing paper by setting the double-sided printing mode, the printing is performed on the front surface of the printing paper fed by the paper feeding device. When performing the printing, at a predetermined interval during the rotation of the printing drum, do not feed the printing paper by the paper feeder,
In addition, when the displacing means is deactivated and printing is performed on the back side of the front-side printed paper fed by the re-feeding device, the re-feeding device is operated at predetermined intervals during rotation of the printing drum. By providing a drum idle rotation intermittent paper feed control unit that does not feed the printed paper and deactivates the displacement unit, it is possible to reduce the occurrence of set-off and contamination of the conveyance unit, which are the effects of the invention according to claim 3. It is possible to reliably prevent the occurrence of surface printing stains.

According to the eighth aspect of the present invention, when the front-side printed sheet is conveyed toward the paper discharge tray by the reverse conveying unit, the displacing unit is set so as not to print on the back side of the front-side printed sheet. By having the control means for operating, it is possible to prevent the occurrence of set-off, perform the troublesome operation of interleaving paper separation and paper alignment, and print the hand of the user with this troublesome operation. Since the surface-printed paper and the slip sheet can be automatically separated and discharged without being stained with the ink, the operability is improved and the convenience is improved.

According to the ninth aspect of the present invention, it is possible to perform an operation related to a sorting mode for sorting printed sheets for every predetermined number of sheets. By discharging the slip sheet every predetermined number of printed sheets in the print sheet discharging direction, sorting can be performed in addition to the effect of the invention according to any one of claims 2 to 8.

According to the tenth aspect, the slip sheet is
By using colored paper, in addition to the effect of the invention described in claim 9, the visibility of the sorting is improved, so that clear sorting can be performed.

According to the eleventh aspect, when the initial print mode is set and printing is performed, the displacement means is operated with respect to the slip sheet for initial printing fed by the slip sheet feeding device. When the printing is performed by setting the slip sheet mode, the displacing means is operated with respect to the print sheet fed by the sheet feeding device, and the slip sheet is fed from the slip sheet feeding device. Operation control means for disabling the displacement means, a re-feeding device capable of feeding printed sheets and interleaved paper stacked on the sheet ejection tray, and a printed sheet fed from the re-feeding device Slippage separation means that paper is separated in the print paper discharge direction and the slip sheet is separated and discharged in the slip sheet discharge direction, thereby preventing set-off, contamination of the transport unit, and occurrence of surface printing stains. As well as the troublesome work of separating and aligning slip sheets. It is possible to automatically separate and discharge the printed paper and interleaf paper without having to perform the work or contaminate the user's hands with the ink of the printed image due to this troublesome operation. And the convenience is improved. In addition, by feeding a required number of sheets of interleaf paper for initial printing from an interleaf paper feeder different from the paper feeder, printing paper is not wasted.

According to the twelfth aspect of the present invention, when the duplex printing mode is set, the slip sheet feeding device is caused to feed a predetermined number of slip sheets to the uppermost portion of the discharge tray in the re-feeding device. It has control means for operating the displacement means with respect to the interleaving paper for initial printing fed by the re-feeding device, and is used for initial printing when printing a predetermined number of interleaving papers on the back side of the front side printed paper. By using it as a sheet, in addition to the effect of the invention according to claim 11, the printed sheet stacked immediately below a predetermined number of slip sheets placed on the top of the sheet discharge tray in the re-feeding device can be used. Since the excess ink can be absorbed by the slip sheet, it is possible to reliably prevent the conveyance section from being stained.

According to the thirteenth aspect of the present invention, the initial printing paper includes printing paper, test printing paper, and the like, and the printing paper is less expensive than the waste paper or printing paper. Since it is made of cheap paper or the like, in addition to the effects of the invention described in claim 11 or 12, it is possible to use printing paper suitable for the purpose of printing. In addition, the trial printing paper includes printing paper, and is used for checking printed images and / or
Alternatively, since it is made of paper or the like in which at least one of the upper, lower, left, and right margins can be confirmed, in addition to the effects of the invention described in claim 11 or 12, use test printing paper suitable for the purpose of test printing. Can be.

According to the fourteenth aspect of the present invention, the plate making means prints the perforated diameter of each master used when performing printing by setting the double-sided printing mode on only one of the front side and the back side of the printing paper. By making the diameter smaller than the perforation diameter of the master used when the printing is performed, it is possible to reliably prevent the set-off and the contamination of the transporting unit and also prevent the generation of the surface printing stain.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a stencil printing machine showing a first embodiment of the present invention.

FIG. 2 is an operation diagram showing a state where a first discharge tray in FIG. 1 occupies a first displacement position, and is a main part showing a configuration of the first discharge tray and a discharge tray moving unit. It is an enlarged front view.

FIG. 3 is an operation diagram showing a state immediately before the first discharge tray in FIG. 1 occupies a second displacement position, and is a main part showing a configuration of the first discharge tray and a discharge tray moving unit; FIG.

FIG. 4 is an enlarged perspective view of a main part showing a configuration of a sheet discharge conveyance unit and a suction switching movement unit in FIG. 1;

FIG. 5 is a cross-sectional view of a main part showing a configuration around a slip sheet separating claw in FIG. 1;

FIG. 6 is a partial perspective view around a printing unit in FIG. 1;

FIG. 7 is a plan view illustrating an operation panel according to the first embodiment and the like.

FIG. 8 is a block diagram illustrating a control configuration according to the first and second embodiments.

FIG. 9 is a schematic front view illustrating a stacking order of front-surface printed paper, interleaf paper, and interleaf paper for initial printing on a paper discharge tray occupying a second displacement position in the first embodiment.

FIG. 10 is a schematic front view illustrating a stacking order of front and back printed sheets and a slip sheet on a discharge tray occupying a second displacement position in the first embodiment.

FIG. 11 is a block diagram illustrating a control configuration according to a modification of the first embodiment.

FIG. 12 is a configuration diagram illustrating a bank paper feed unit according to a modification of the first embodiment.

FIG. 13 is a schematic front view illustrating a sorting state of front and back printed sheets in a modification of the first embodiment.

FIG. 14 is a block diagram illustrating a control configuration according to a third embodiment.

[Explanation of symbols]

9 Re-feeding unit as re-feeding device 10 Printing unit 11 Operation panel 12 Inserting paper key as interleaving mode setting means 13 Double-sided printing key as double-sided printing mode setting means 21 Master 21a Corresponding to image of original B A perforated plate-making master 21b A perforated plate-made master corresponding to the image of the original A 23 A thermal head as a plate making means 26 A printing drum 28 A press roller as a pressing means 43 A printing paper feed as a paper feeding device Units 44, 47 A slip sheet feeding unit as a slip sheet feeding device 50 A sheet discharge transport unit 60-1 as a sheet discharge suction switching unit 60-1 A feed motor constituting a print sheet feed driving unit 60-2 A slip sheet feed Paper feed motor 60-3 that constitutes a drive unit 60-3 Paper feed motor that constitutes a re-feed drive unit 60-4 Paper feed motor that constitutes an interleaf paper feed drive unit 61 Lay 71 Second discharge tray 87 Displacement means 90 Displacement solenoid as displacement drive means constituting the displacement means 93 Intermediate conveyance roller pair constituting the reverse conveyance means 98 Discharge tray for interleaving paper 99 Reversal constituting the reverse conveyance means Conveyance path 100 Discharge tray moving means 111 Separation sheet separation claw as separation sheet separation means 115 Separation claw drive motor 120 Suction switching movement means 130 Horizontal movement mechanism 140 Elevation mechanism 160, 165 Interleaf paper feed drive unit 170 Print paper feed Driving unit 180 Re-feeding driving unit 190 Sorting key 200, 200A, 200B, 200C as sorting mode setting means Operation control means, control device as control means 1000 Stencil type stencil printing machine B Print paper discharge direction C Interleaf paper discharge direction P Print paper PA Insert paper or insert paper for initial printing PA 'Initial printed insert paper P Colored interleaving paper as colored paper Pa Front-printed paper Pb Front and back-printed paper as front and back-printed paper P1 First displacement position P2 Second displacement position HP1 First discharge position HP2 Second discharge position

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2C020 AA00 AA14 3F053 EA05 EB01 EC11 ED02 ED16 LA06 LB03 3F100 AA02 CA03 CA10 CA12 DA08 EA02 EA03 EA12

Claims (14)

[Claims] A printing drum rotatable around a master and a rotatable printing drum;
The first to press the printing paper against the master on this printing drum
Pressing means which can be displaced between a position of the first position and a second position distant from the first position, and displacing means for displacing the pressing means between the first position and the second position A paper feeding device for feeding the printing paper, a slip sheet feeding device for feeding a slip sheet between printed sheets, and a discharge tray for loading the printed sheets and the discharged slip sheet. In a printing apparatus comprising a slip sheet mode for inserting the slip sheet between the printed paper, when performing the printing by setting the slip sheet mode, Operation control for operating the displacing means for the printing paper fed by the paper feeding device and deactivating the displacing means for the slip sheet fed by the slip sheet feeding device Means, and the printed paper and the slip sheet stacked on the paper discharge tray A re-feeding device capable of feeding, and an interleaf discharging the interleaf fed from the re-feeding device in a print paper discharging direction of the printed paper fed from the re-feeding device. And a slip sheet separating means capable of separating and discharging the paper in each direction. 2. The printing apparatus according to claim 1, wherein an operation relating to a double-sided printing mode for printing on the front and back surfaces of the printing paper can be performed, and The front-printed paper and the interleaf fed by a paper device are discharged in the print paper discharge direction, and the front-printed paper and the interleaf discharged in the print paper discharge direction by the interleaf separation means are removed. Reversing transport means for reversing and transporting the front side printed paper and the interleaving sheet so that each back side faces the printing drum; and When the finished paper is conveyed toward the paper output tray, the displacing means is operated to print on the back side of the front side printed paper, and the slip sheet is conveyed toward the paper output tray. When the displacing means is deactivated, the re-feeding device is thereafter operated to re-feed the front and back side printed sheets interposed with the interleaving sheet, and the interleaving sheet separating means is operated. Control means for alternately discharging the front and rear printed sheets in the print paper discharge direction and the interleaving paper in the interleaf discharge direction, respectively. 3. The printing apparatus according to claim 1, wherein an operation relating to a double-sided printing mode for printing on front and back sides of the printing paper can be performed, and The front-side printed paper fed by the paper device is alternately separated and discharged in the print paper discharge direction, and the interleaving paper is alternately discharged in the interleaf discharge direction, and is discharged in the print paper discharge direction by the interleaf separation means. A reversing transport unit for reversing and transporting the front side printed paper so that the back side of the front side printed paper faces the printing drum, and when the duplex printing mode is set, Control means for activating the displacement means to print on the back side of the front side printed sheet when the front side printed sheet is conveyed toward the discharge tray. That the printing device. 4. The printing apparatus according to claim 3, further comprising plate making means for forming a perforation in said master to form a plate, and wherein said plate making means is set when said double-sided printing mode is set.
A printing apparatus, wherein a perforation diameter of a master used when printing on the back side of the front side printed paper is smaller than a perforation diameter of a master used when printing on the front side of the printing paper. 5. The printing apparatus according to claim 3, further comprising plate making means for making a plate by forming a perforation in said master, wherein said plate making means sets each of said double-sided printing modes and performs printing. A printing apparatus, wherein the diameter of the perforations of the master is smaller than the diameter of the perforations of the master used when printing only on one of the front side and the back side of the printing paper. 6. The printing apparatus according to claim 3, wherein the duplex printing mode is set, and printing is performed on the back side of the front side printed sheet fed in the printing sheet discharge direction by the re-feeding device. At a predetermined interval during rotation of the printing drum, the re-feeding device does not feed the front-printed sheet, and the drum idle rotation intermittent sheet feeding control means for disabling the displacement means. A printing device, comprising: 7. The printing apparatus according to claim 3, wherein the printing paper fed by the paper feeding device is used when the duplex printing mode is set to perform printing on the front and back surfaces of the printing paper. When printing is performed on the surface of the printing drum, at a predetermined interval during the rotation of the printing drum, the paper feeding device does not feed the printing paper, and the displacing means is deactivated, and the re-feeding is performed. When printing on the back side of the front side printed paper fed by a paper device, at a predetermined interval during rotation of the printing drum, the re-feeding device is not used to feed the front side printed paper. And a drum idle rotation intermittent paper feed control means for disabling the displacement means. 8. The printing apparatus according to claim 1, wherein the interleaving paper separating unit is configured to remove the front-printed paper fed by the re-feeding device in the printing paper discharging direction and to insert the interleaving paper into the interleaving paper. The front-side printed paper is reversed and conveyed such that the back side of the front-side printed paper discharged in the printing paper discharge direction by the interleaving sheet separating unit is opposed to the printing drum. A reversing conveyance unit, wherein when the reversing conveyance unit conveys the front-surface-printed paper toward the paper ejection tray, the displacement unit is deactivated so as not to print on the back surface of the front-surface-printed paper. A printing apparatus, comprising: control means; 9. The printing apparatus according to claim 2, wherein an operation related to a sorting mode for sorting the printed sheets by a predetermined number of sheets can be performed. When the setting is made, the interleaving paper separating means discharges the interleaving paper in the printing paper discharging direction for each of the predetermined number of the printed papers. 10. The printing apparatus according to claim 9, wherein said interleaving paper is colored paper. 11. A print drum on which a master is wound and rotatable, and a displacement between a first position for pressing a printing sheet against the master on the print drum and a second position apart from the first position. A flexible pressing means, a displacement means for displacing the pressing means between a first position and a second position,
A sheet feeding device for feeding the printing paper, a slip sheet feeding device for feeding a slip sheet between printed sheets, and a sheet discharge tray for stacking the printed sheets and the discharged slip sheet. Then, the operation according to the slip sheet mode for inserting the slip sheet between the printed sheets and the operation according to the initial print mode using a predetermined number of slip sheets as the sheet for initial printing can be performed. In the printing apparatus, when the initial printing mode is set and printing is performed, the displacing unit is operated with respect to the initial printing interleaf fed by the interleaf paper feeding device, and the interleaving is performed. When performing printing by setting a paper mode, operating the displacement means for the printing paper fed by the paper feeding device, and,
An operation control unit for disabling the displacement unit with respect to the interleaf fed from the interleaf paper feeding device; and feeding the printed paper and the interleaf loaded on the paper ejection tray. A re-feeder capable of separating and discharging the printed paper fed from the re-feeder in a print paper discharge direction and a slip sheet in a slip sheet discharge direction. A printing apparatus, comprising: paper separating means. 12. The printing apparatus according to claim 11, wherein an operation relating to a double-sided printing mode for printing on the front and back sides of the printing paper can be performed. The interleaf paper feeding device is used to feed a predetermined number of the interleaving papers to the uppermost portion of the paper discharge tray in the re-feeding device. A printing apparatus, further comprising control means for operating the displacing means, wherein the control means is used as the paper for the initial printing when the predetermined number of the slip sheets are printed on the back side of the front side printed paper. 13. The printing apparatus according to claim 11, wherein the paper for initial printing includes printing paper, test printing paper, or the like, and the printing paper is a waste paper or the printing paper. The test printing paper includes the printing paper, and is a paper on which a print image can be checked and / or at least one of upper, lower, left, and right margins can be checked. A printing device comprising: 14. A printing drum on which a master is wound and which is rotatable, pressing means for pressing a printing sheet against the master on the printing drum, plate making means for forming a perforation in the master by forming a hole, and forming the printing sheet on the printing drum. And a paper feeding device for feeding,
In a printing apparatus capable of performing an operation related to a double-sided printing mode for printing on the front side and the back side of the printing paper, the plate-making means includes a master for setting the double-sided printing mode and performing printing. Wherein the diameter of the perforation is smaller than the perforation diameter of a master used when printing only on one of the front and back surfaces of the printing paper.