JP4593377B2 - Stencil printing apparatus and stencil printing apparatus network system - Google Patents

Description

  The present invention relates to a stencil printing apparatus and a stencil printing apparatus network system, and more particularly, a stencil printing apparatus also called a stencil printing apparatus integrated with a stencil printing apparatus, and a confidential mode process in a stencil printing apparatus network system communicatively connected thereto. And declassification mode processing.

  2. Description of the Related Art Conventionally, a plate making apparatus integrated and heat sensitive digital stencil printing apparatus is known as a simple printing method. This is because a thermal head in which fine heating elements are arranged in one or more rows is brought into contact with a heat-sensitive stencil master (hereinafter referred to as “master”) having a thermoplastic resin film, and the heating elements are energized in pulses. While the master is being transported by a master transport means such as a platen roller, the thermoplastic resin film portion of the master that is in contact with the heating element of the thermal head is punched in the master by heating and melt punching based on the image information. After the image is formed, the punched master (hereinafter referred to as a “printed master”) is wound around the outer peripheral surface of a plate cylinder, also referred to as a printing drum, and printed paper (hereinafter referred to as “paper”) by pressing means such as a press roller. ) Is pressed against the outer peripheral surface of the plate cylinder to cause ink to ooze out from the perforated part of the plate cylinder and the perforated part of the master. And it forms a printed image by transferring to the paper (for example, see Patent Document 1).

  In a stencil printing apparatus as described above (hereinafter sometimes referred to as “stencil printing machine”), when confidentiality of a print image is performed, as disclosed in, for example, Japanese Patent No. 3666367 (Patent Document 1), There is a technique that, when the “confidentiality maintenance mode” is selected, after the plate making / printing operation is completed, additional printing is disabled. This technique is also for preventing image data in the used master that has arrived on the plate cylinder from being printed by a third party.

On the other hand, recently, recording means (storage device or storage device) for recording image data, such as RAM (generic name for readable / writable memory), flash / EEPROM (flash memory), or HDD (hard disk or hard disk drive). With the widespread use of the medium, it has become common to record the acquired image data once in a recording means and recall and use it later, or to process and use the image data later.
Here, the RAM means a readable / writable memory including a DRAM which is a volatile memory and an SRAM which can be made a nonvolatile memory by backing up with a battery. Flash / EEPROM means a nonvolatile memory in which data can be electrically rewritten.

  Also in a stencil printing apparatus, image data obtained by reading an image of an original with an image reading apparatus, or a personal computer (hereinafter referred to as “PC” or “PC”) connected to the stencil printing apparatus in a communicable manner. Image data acquired from a data editing device (hereinafter simply referred to as “computer”) such as a host computer or the like, and converted into a form that can be written in a master for stencil printing, and the converted image data is converted into converted image data recording means (for example, There is known a method of storing / recording in an image memory), calling the recorded converted image data, and performing heating / drilling plate making on a master by plate making means (see, for example, Patent Document 2).

As described above, when the converted image data is recorded in the converted image data recording means, the user can use the recorded converted image data as it is, or can be used after further image processing, There is an advantage that the converted image data recorded in the recording means can be called at any time, and can be made and printed at any time.
However, since the converted image data recorded in the converted image data recording means can be used arbitrarily by a person other than the user himself / herself, the converted image data contains confidential information that is difficult to be known by a third party. In some cases, there was a problem that information was leaked and confidentiality could not be maintained.

  In order to deal with this problem, in the technical field of electrophotographic image forming apparatuses, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-125184 (Patent Document 3), an instruction or operation for capturing the next image data There has been known a method of erasing image data recorded before when the image data is recorded.

Japanese Patent No. 3566367 Japanese Patent No. 3400763 JP 2003-125184 A

However, the method described in Japanese Patent Application Laid-Open No. 2003-125184 is effective in electrophotography (PPC), but, unlike electrophotography (PPC), in a stencil printing machine that creates and uses a plate, the method is listed below. There are insufficient points.
In the stencil printing machine, when image data acquisition is performed as described above and the series of operations of plate making → plate feeding → plate printing → printing ends without any problem, it is described in JP-A-2003-125184. If the “confidential mode” is set, the converted image data recorded in the converted image data recording means is sent to the recording means if no instruction or operation for taking the next converted image data is made. The recorded image data cannot surely be taken out, plate-making, plate-making / printing. However, for example, if the plate printing fails due to a paper feed failure or the like, the jammed paper is removed and the printing is started again from the plate printing. The converted image data remains in the recording means without being erased, and plate making becomes possible again. In such a case, for example, if a malicious third party replaces another printing drum to perform plate making, plate making is possible and image data having confidential information can be acquired.

More specifically, after the start of plate making, when the user is no longer in front of the stencil printing machine or when printing is performed via a network from a PC (personal computer) in a separate room, etc. If a third party with a print job intentionally jams the plate, or stops printing and stops printing, the plate is made based on image data with confidential information, and the plate has been made. It becomes possible to obtain image data having confidential information by feeding and winding the master on another printing drum. As described above, in the stencil printing machine for making a plate, a partly inappropriate problem is caused under the security keeping condition as disclosed in JP-A-2003-125184.
Therefore, the present invention has been made in view of the above-described circumstances, and solves the above problems, that is, the acquired image data having confidential information is once converted into a form that can be written into the master, and the converted image is obtained. Confidentiality can be easily maintained by leaving unnecessary converted image data in the converted image data recording means while retaining the advantages of recording and storing data in the converted image data recording means. The main purpose is to provide a stencil printing apparatus. In addition, another object is to obtain the advantages and effects described in the embodiments described later.

In order to solve the above-described problems and achieve the above object, the present invention employs the following invention specific matters (hereinafter referred to as “configuration”) in the invention of each claim. It is.
The invention according to claim 1 is an image processing means for converting the acquired image data for stencil printing, and a converted image data recording means for recording the converted image data converted for stencil printing by the image processing means. And a plate making means for making a master on the basis of the converted image data recorded in the converted image data recording means, and a master for which the plate making has been wound around the outer peripheral surface, and ink is applied to the pre-made master on the outer peripheral surface. In the stencil printing apparatus comprising a printing drum to be supplied and a plate-feeding unit for plate-making a master that has been subjected to plate-making on the outer peripheral surface, the plate-making unit performs perforation-making of the master based on the converted image data, The security mode for erasing the converted image data recorded in the converted image data recording means can be executed.

  According to a second aspect of the present invention, there is provided image processing means for converting acquired image data for stencil printing, and converted image data recording means for recording converted image data converted for stencil printing by the image processing means. And a plate making means for making a master on the basis of the converted image data recorded in the converted image data recording means, and a master for which the plate making has been wound around the outer peripheral surface, and ink is applied to the pre-made master on the outer peripheral surface. A printing drum to be supplied; plate-feeding means for plate-making a pre-made master on the outer peripheral surface; and plate-making detecting means for detecting whether or not the pre-made master has made a plate on the outer peripheral surface. In the stencil printing machine provided, the plate making means perforates the master based on the converted image data, the plate making means makes the master made on the outer peripheral surface, and the plate making detection means The Chakuban ending after detecting Ri, wherein the confidential mode for erasing the converted image data recorded on the converted image data recording unit is executable.

According to a third aspect of the present invention, in the stencil printing apparatus according to the first aspect, it is possible to select whether or not to execute the confidentiality mode.
A fourth aspect of the present invention is the stencil printing apparatus according to the first or third aspect, further comprising mode selection setting means for selecting / setting whether or not to execute the confidentiality mode.

According to a fifth aspect of the present invention, in the stencil printing apparatus according to the second aspect, it is possible to select whether or not to execute the confidentiality mode.
A sixth aspect of the present invention is the stencil printing apparatus according to the second or fifth aspect, further comprising mode selection setting means for selecting / setting whether or not to execute the confidentiality mode.

A seventh aspect of the present invention comprises a computer communicatively connected to the stencil printing apparatus according to any one of the first to sixth aspects, wherein the stencil printing apparatus is based on a signal from the computer. An operating stencil printing apparatus network system, wherein the computer transmits image data to be acquired to the image processing means according to any one of claims 1 to 6 .

As described above, according to the present invention, it is possible to provide a novel stencil printing apparatus and stencil printing apparatus network system by solving the above-described problems of the prior art. The effects of the invention for each claim are as follows.
According to the first aspect of the present invention, the converted image data converted for stencil printing by the image processing means is recorded in the converted image data recording means, and the master is punched and made by the plate making means based on the converted image data. After that, the conversion image data used for the plate making recorded in the converted image data recording means can be erased from the converted image data recording means by a third party by executing a confidentiality mode unique to the present invention. called the converted image data, since it will not be plate-making and printing, Ru can be performed confidentiality.

According to the second aspect of the present invention, the converted image data converted for stencil printing by the image processing means is recorded in the converted image data recording means, and the master is punched and made by the plate making means based on the converted image data. After that, the plate-making master was made to plate on the outer peripheral surface of the printing drum by the plate-feeding means, and after the plate-making detection was detected by the plate-making detection means, it was used for the plate-making recorded in the converted image data recording means. Since the confidentiality mode peculiar to the present invention of erasing the converted image data can be executed, the converted image data is not called from the converted image data recording means by a third party, and is not made and printed. Therefore, not only can confidentiality be maintained, but if trouble occurs during plate-making or plate-making / plate-making after plate-making, the corresponding converted image data is saved. Ru can leave conversion image data recording means.

According to the third aspect of the present invention, since it is possible to select whether or not to execute the confidentiality mode, if confidentiality is required, the converted image data recorded in the converted image data recording unit is stored. erased, in the case of confidential problem is not, without erasing, Ru can use the converted image data at a later date applicable.

According to a fourth aspect of the present invention, by having mode selection setting means for selecting / setting whether or not to execute the confidentiality mode, if confidentiality is required, it is recorded in the converted image data recording means. erases the converted image data is, in the case of confidential problems not, without erasing, Ru can be used to convert image data at a later date applicable.

According to the fifth aspect of the present invention, since it is possible to select whether or not to execute the confidentiality mode, if confidentiality is required, the converted image data recorded in the converted image data recording unit is stored. erased, in the case of confidential problem is not, without erasing, Ru can use the converted image data at a later date applicable.

According to the sixth aspect of the present invention, by including mode selection setting means for selecting / setting whether or not to execute the confidentiality mode, if confidentiality is required, it is recorded in the converted image data recording means. erases the converted image data is, in the case of confidential problems not, without erasing, Ru can be used to convert image data at a later date applicable.

According to the seventh aspect of the present invention, in the stencil printing apparatus network system, which is composed of a computer that is communicably connected to the stencil printing apparatus and operates based on a signal from the computer, the stencil printing is also performed. the image processing means of the device, by sending the image data to be acquired, that Sosu each effect described above.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention (hereinafter referred to as “embodiments”) including the best mode for carrying out the invention, examples and the like will be described below with reference to the drawings. In each embodiment, each modification, etc., components such as members and components having the same function and shape are described once, and the description thereof is omitted by attaching the same reference numerals. In the figure, components that are configured as a pair and do not need to be specifically distinguished and described are described by appropriately describing one of them in order to simplify the description. In order to simplify the drawings and the description, even if the components are to be represented in the drawings, the components that do not need to be specifically described in the drawings may be omitted as appropriate. When quoting and explaining constituent elements such as published patent gazettes, the reference numerals are shown in parentheses to distinguish them from those of the embodiments.

First, with reference to FIG. 1, the whole structure of the stencil printing apparatus 1 of the plate-making printing integrated and digital thermal type which shows one Embodiment of this invention is demonstrated easily. In FIG. 1, reference numeral 2 denotes a stencil printing apparatus main body that forms the framework of the stencil printing apparatus 1.
Compared with the stencil printing apparatus (1) shown in FIG. 1 of Japanese Patent Application Laid-Open No. 2004-9320 proposed by the applicant of the present application, the stencil printing apparatus 1 is provided with a stencil detection sensor 73. 8 instead of the operation panel (90) shown in FIG. 8, the operation panel 85 to which a new configuration to be described later is added, and the control configuration shown in FIG. The main difference is that a control configuration to which a configuration related to the new control described above is added is used.

  As shown in FIG. 1, the stencil printing apparatus 1 includes a plate making means 4 for making a plate 8 and transferring a master 8a wound in the form of a roll arranged on the upper right side of FIG. 1, a cutting means 5 to be described later, a master transport means 6 and A plate making / writing device 3, which is also called a plate making / plate feeding device, provided with a master sending means 7 and the like, and an image of a document 20 which is arranged on the upper part of the stencil printing apparatus main body 2 and automatically transferred from the document placing table 10 are read. A printing drum 33 having a plate cylinder around the outer peripheral surface of the original reading device 9 and a master 8b, which is disposed at a substantially central portion in FIG. 1 and wound around the outer peripheral surface, and the plate cylinder outer peripheral surface of the printing drum 33 ( Hereinafter, it is simply referred to as “the outer peripheral surface of the printing drum 33”) and has a press roller 54 or the like as a pressing means that presses the paper P against the master 8b on the printing drum 33 that has been pre-made. A drum device 32; and a paper feed device 47 that is disposed below the plate-making writing device 3 and feeds the paper P on a paper feed tray 48 serving as a paper feed tray between the printing drum 33 and the press roller 54; The plate discharging device 62 is disposed opposite to the plate making / writing device 3 with the printing drum 33 interposed therebetween, and the used master 8c on the printing drum 33 is peeled and discharged. The plate discharging device 62 is disposed below the plate discharging device 62 and printed. A paper discharge device 56 that peels the paper P from the printing drum 33 and discharges the paper P to a paper discharge tray 61 serving as a paper discharge tray, and is operated to give instructions to the devices to perform desired operations. The operation panel 85 shown in FIG. 2 and the like for notifying the state of the apparatus and the control device 100 shown in FIG. 7 are mainly configured.

  The overall configuration of the stencil printing apparatus 1 is well known except for the operation panel 85 shown in FIG. 2 and the control apparatus 100 shown in FIG. 1 and FIG. Is. Therefore, in the present embodiment, the advantages and effects described above and below will be obtained only by slightly changing the control configuration of the conventional control device. Therefore, the control device 100 may be replaced with a device configuration that has been known to date and has the same function, instead of the above-described device configurations.

  The plate-making writing device 3 is a master support as a master support means for supporting the master 8a so that the master 8a can be fed out in the master transport direction X1 in the order arranged from the upstream side to the downstream side in the master transport direction X1 indicated by an arrow in FIG. The member 21 and the thermal head 22 constituting the plate making means 4 for making the master 8a that has been fed out according to the image information, and the master downstream in the master transport direction X1 while pressing the master 8a against the thermal head 22 A platen roller 23 constituting the plate-making means 4 for conveying the plate 8a while rotating, and a pre-made master 8b or an unmade master 8a disposed between the plate-making means 4 and the master conveying means 6 A master transport direction X is further applied while applying an appropriate tension to the cutting means 5 for cutting the length and the master 8a transported by the platen roller 23. A master transporting means 6 for transporting downstream; a guide plate 29 disposed between the master transporting means 6 and the master delivery means 7 for guiding the master 8a transported by the master transport means 6 to the master delivery means 7; The master delivery means 7 for delivering the master 8a conveyed by the platen roller 23 and the master conveyance means 6 toward the expanded clamper 35 on the printing drum 33 as will be described later, and the master delivered by the master delivery means 7 As will be described later, a pair of master guide plates 28 for guiding the leading end of 8a to the expanded clamper 35 on the printing drum 33 is provided.

The master 8a has a continuous sheet shape, and is wound around, for example, a synthetic resin roll core 8d to form the master roll 8. The roll core 8d protrudes from both end faces of the master roll 8 and is formed longer than the width of the master 8a. In the master roll 8, the roll cores 8 d at both ends are rotatably supported by the master support member 21 in a counterclockwise direction, and are detachable from the master support member 21. The master support members 21 on both ends are attached and fixed to a plate-making side plate pair (not shown) fixed on both the left and right sides along the master transport direction X1 in the plate-making writing device 3. Therefore, the master 8a is supported by the master support member 21 so that the master 8a can be fed out from the master roll 8 in the master transport direction X1.
The master 8a has a laminated structure in which, for example, a thermoplastic resin film having a thickness of 1 to 5 μm and a porous support made of synthetic fiber or the like are bonded together. In addition, the master is not limited to this, for example, a paste obtained by bonding a porous support made of Japanese paper fiber or a mixture of Japanese paper fiber and synthetic fiber and a thermoplastic resin film, or a so-called substantially thermoplastic material. A master made only of a resin film is also used.

The thermal head 22 extends parallel to the axis of the platen roller 23 and the near side and the far side of the paper surface of FIG. 1, and includes a cam member (not shown) and a spring member as an urging means. By means (not shown), the platen roller 23 can be contacted and separated via the master 8a. The thermal head 22 is urged by the spring member so as to contact the platen roller 23. In the main scanning direction of the thermal head 22, a large number of heating elements (not shown) are disposed at portions that contact the platen roller 23 via the master 8 a. As shown in FIG. 7, the thermal head 22 includes a contact image sensor (hereinafter sometimes abbreviated as “CIS”) 14 as an image reading unit disposed in the document reading device 9, and an A / D conversion device. 43. Converted image data recorded in the image memory 45 via the image signal processing device 44 passes through the image signal processing device 44 again, and is not shown in the drawing making control unit and thermal head driving circuit disposed in the control device 100. The thermoplastic resin film portion of the master 8a is selectively heated and melted by selectively heating the heating element based on a binary digital image signal processed and sent out by the plate making section drive circuit 81 having Then, perforating plate making is performed to form a master 8b that has been made.
The platen roller 23 is rotatable in the clockwise direction because both ends of its shaft are rotatably supported by the plate-making side plate pair. The platen roller 23 is connected to a first stepping motor 23A, which is a motor driven by pulse input, for example, as a driving means via a rotation transmission means (not shown) such as a timing belt or a gear. To the downstream side of the master transport direction X1 while pressing the master 8a against the thermal head 22.
As described above, when the platen roller 23 is driven to rotate clockwise by the first stepping motor 23 </ b> A, the master 8 a is pulled out from the master roll 8.

The cutting means 5 includes a movable blade 24 and a fixed blade 25. The cutting means 5 is moved by rotating the cutter blade 24A in the master width direction (from the back side to the front side in FIG. 1) perpendicular to the master transport direction X1 by driving the cutter motor 24A. It is of the movable blade rotation movement type that cuts 8a and the master 8b that has been subjected to plate making.
The cutting means 5 is not limited to the movable blade rotational movement type, but may be a so-called guillotine type in which the movable blade moves up and down.

The master transport unit 6 includes a transport drive roller 30 and a transport driven roller 31. The transport driving roller 30 and the transport driven roller 31 are provided with an appropriate pressing force applied by an urging means such as a spring and pressed against each other, and both end portions of each roller shaft are rotatable with respect to the plate making side plate pair. By being supported, they are rotatable in opposite directions. The conveyance drive roller 30 is connected to the first stepping motor 23A via a rotation transmission means (not shown) such as a timing belt or a gear, and is driven to rotate by the first stepping motor 23A. The transport driven roller 31 rotates with the transport drive roller 30 and is driven to rotate.
The conveyance driving roller 30 is set to rotate at a peripheral speed (conveyance speed) slightly faster than the peripheral speed (conveyance speed) of the platen roller 23 by the rotation transmission means including the first stepping motor 23A. An appropriate front tension is applied to the master 8a while sliding between the master 8a.

The master delivery means 7 includes a delivery drive roller 26 and a delivery driven roller 27. The feed drive roller 26 and the feed follower roller 27 are also provided in pressure contact with each other by an appropriate pressing force such as a spring, similarly to the rollers 30 and 31, and both end portions of each roller shaft. Are rotatably supported by the plate-making side plate pair so that they can rotate in opposite directions. The delivery drive roller 26 is different from the first stepping motor 23A as a motor driven by pulse input, for example, via a rotation transmission means (not shown) such as a timing belt or a gear as drive means (not shown). It is connected to the second stepping motor 26A and is driven to rotate by the second stepping motor 26A. The delivery driven roller 27 has a function of delivering the master-making master 8b to an expanded clamper 35 on the printing drum 33 described later by rotating along with the delivery drive roller 26 and being driven to rotate. Therefore, the master delivery means 7 has a part of a function as a plate supply means for making the master 8 b that has been subjected to plate making arrive on the outer peripheral surface of the printing drum 33 via the clamper 35.
The delivery master guide plate 28 and the guide plate 29 are attached and fixed to the plate making side plate pair. The delivery master guide plate 28 has a function of guiding the master 8b that has been subjected to plate making to an expanded clamper 35 on a printing drum 33 described later.

  On the master conveyance path between the platen roller 23 and the master conveyance means 6 and between the master conveyance means 6 and the master delivery means 7, there is a master detection means for detecting the tip of the conveyed master 8a. Each is arranged. As these master detection means, for example, a master tip detection sensor (63 (63B, 63C)) comprising a reflection type optical sensor described in FIG. 1 of Japanese Patent Laid-Open No. 9-226088 proposed by the applicant of the present application. And has a function for detecting the master 8a staying on the master transport path due to a master transport jam or the like.

  In FIG. 7, the main driving circuit of the plate-making writing device 3 includes a plate-making unit driving circuit 74 including the thermal head driving circuit that drives the thermal head 22 that is a control target driving unit of the plate-making writing device 3. A cutter driving circuit 82 that drives the cutter motor 24A that is the same control target driving means, and a master transport unit driving circuit 83 that drives the first stepping motor 23A and the second stepping motor 26A that are the same control target driving means, Is provided.

  The document reading device 9 includes a document placing table 10 for placing a plurality of documents 20 in the order of being arranged from the upstream side to the downstream side in the document conveying direction X2 indicated by the arrow in FIG. A document transport roller 11 and a document transport roller 12 constituting a document transport unit that transports the document 20 placed and set thereon in the document transport direction X2, and between the document transport unit and an image reading unit 19 described later. A document leading end detection sensor 13 serving as a document detecting means for detecting the leading end of the document 20 that is provided and transported by the document transport roller 11 and the document transport roller 12, and the document 20 transported by the document transport roller 11 and the document transport roller 12. An image reading unit 19 having a contact image sensor (hereinafter abbreviated as “CIS”) 14 as an image reading means for reading the image of the image, and a document conveyance path The pressure plate (white reference plate) 15 disposed above the CIS 14, the document discharge roller 16 and the document discharge roller 17 that further conveys / discharges the document 20 on which the image has been read in the document conveyance direction X 2, and is discharged. And an original receiving tray 18 on which the original 20 is placed and stacked.

A pair of side fences (not shown) for aligning both side ends of the document 20 stacked on the document table 10 are arranged in the document width direction perpendicular to the document conveyance direction X2 on the back side and the near side of the document table 10. It is arranged to be movable. A document 20 in the vertical direction, the document transport direction X2, and the document width direction is formed by the document placement table 10, the nip portion formed by press contact between the document transport roller 11 and the document transport roller 12, and the pair of side fences. A document setting unit for positioning and setting the three-dimensionally is configured.
The document transport roller 11 and the document transport roller 12 are provided with an appropriate pressing force applied by an urging means such as a spring and pressed against each other, and both ends of each roller shaft are in the document transport direction in the document reader 9. By being rotatably supported by a pair of reading side plates (not shown) fixed on both the left and right sides along X2, they are rotatable in opposite directions. The document conveying roller 11 is connected to a stepping motor 11A for the document conveying roller via a rotation transmission means (not shown) such as a timing belt or a gear, and is rotated by the stepping motor 11A. The document transport roller 12 is rotated with the document transport roller 11 and rotated.

The document leading edge detection sensor 13 is composed of a reflective optical sensor. A position indicated by an upward arrow in the CIS 14 indicates a reading position 14A for starting reading an image of the document 20 conveyed by the document conveying roller 11 and the document conveying roller 12 at the position. The pressure plate (white reference plate) 15 has a function of performing optical correction.
The image reading unit is not limited to the CIS 14 and may be an image sensor including a photoelectric conversion element such as a CCD.
The document discharge roller 16 and the document discharge roller 17 are provided so as to be pressed against each other with an appropriate pressing force applied by an urging means such as a spring, and both end portions of each roller shaft rotate to the reading side plate pair. By being supported freely, they can rotate in opposite directions. The document discharge roller 16 is connected to a stepping motor 11A for a document conveying roller as a motor driven by pulse input via a rotation transmission means (not shown) such as a timing belt or a gear, for example. It is rotationally driven by 11A. The document discharge roller 17 is rotated with the document discharge roller 16 and rotated.

  In FIG. 7, as a main drive circuit of the document reading device 9, a stepping motor drive circuit that drives a stepping motor 11 </ b> A that is a control target drive unit of the document reading device 9 and a drive circuit that drives the CIS 14 are provided. These are collectively referred to as a reading unit driving circuit 74.

  The plate feeding / drum device 32 includes the above-described printing drum 33, a clamper 35 serving as a locking unit that holds and locks the leading end of the master 8b that has been sent out by the master feeding unit 7, and a printing drum 33. The ink supply means 36 for supplying ink from the inner peripheral side of the printing drum 33 to the master 8b on the printing drum 33 and the press roller 54 are provided.

The outer peripheral portion of the printing drum 33 is a porous support cylinder, also called a cylindrical plate cylinder, and a mesh screen (not shown) made of a resin or metal mesh wound around a plurality of layers so as to cover the outer periphery of the support cylindrical body. 2). The printing drum 33 includes a printable opening having a large number of ink-permeable holes and a non-printable opening provided with a clamper 35 and the like as indicated by arrows in FIG. It is formed along the rotation direction 33.
The outer peripheral portion of the printing drum 33 is wound and fixed to the outer peripheral portions of both end plate flanges (not shown), and is rotatably supported around a support shaft 34 that also serves as an ink pipe 34 to be described later. The support shaft 34 is detachably supported by a pair of casing side plates (not shown) fixed to the stencil printing apparatus main body 2 on the back side and the near side of the paper surface of FIG. The printing drum 33 is connected to, for example, a main motor 40 as a driving unit via a driving transmission unit such as a gear or a belt (not shown), and is driven to rotate clockwise by the main motor 40 as indicated by an arrow in FIG. As the main motor 40, for example, a control DC motor is used.

Inside the printing drum 33, it is rotatably supported by a side plate (not shown) fixed to the support shaft 34, and the rotational driving force of the main motor 40 is transmitted by drive transmission means such as a gear (not shown). 1 and an ink roller 37 that is driven to rotate in the clockwise direction in FIG. 1 and that contacts the inner circumferential surface of the support cylinder of the printing drum 33 (hereinafter referred to as “the inner circumferential surface of the printing drum 33”) to supply ink. A doctor roller 38 that is arranged in parallel with the ink roller 37 with a slight gap and forms a wedge-shaped ink reservoir 39 between the ink roller 37 and an ink pipe 34 that supplies ink to the ink reservoir 39 is disposed. Has been. As described above, the ink supply means 36 is mainly composed of the ink roller 37, the doctor roller 38 and the ink pipe 34.
The ink in the ink reservoir 39 is sucked by an ink pump (not shown) from an ink pack (not shown) provided outside the printing drum 33, supplied from the supply hole of the ink pipe 34, and kneaded. The ink in the ink reservoir 39 is supplied as a thin film on the outer peripheral surface of the ink roller 37 while being measured by the doctor roller 38, and the outer peripheral surface of the ink roller 37 is in contact with the inner peripheral surface of the printing drum 33. 33 is supplied to the opening portion.
Above the ink reservoir 39 forming portion, a capacitance type ink detection needle (not shown) for detecting the presence / absence of ink (appropriate amount of ink) in the ink reservoir 39 and connected thereto are configured. A known ink detection sensor 111 shown only in FIG. 7 is provided.

A part of the printing drum 33 on the outer peripheral surface of the non-opening portion is provided with a ferromagnetic stage (not shown) provided along one bus bar of the printing drum 33 and both side ends of the stage. Further, a clamper 35 having a rubber magnet that is rotatably attached to the shaft 35a and that can be opened and closed with respect to the flat portion of the stage is provided. The clamper 35 is opened and closed at a predetermined rotational position of the printing drum 33 by opening / closing means (not shown) provided with a clamper motor (not shown) provided on the housing side plate on the stencil printing apparatus main body 2 side to open and close the clamper 35. Is done. The printing drum 33 is stopped in a state in which the clamper 35 is positioned substantially on the right side as shown in FIG.
Specific examples of the opening / closing means include an opening / closing member (not shown) that selectively engages the clamper 35, a clamper motor (18) that drives the opening / closing member, and the like. The same configuration as that shown in FIGS.

  A light shielding plate (not shown) that protrudes in parallel with the support shaft 34 is fixed to the outer periphery of the end plate flange on the back side of the printing drum 33. The stationary member of the casing side plate is a home made of a transmission type optical sensor for detecting the home position of the printing drum 33 (the plate discharge standby position shown in FIG. 1) by selectively engaging with the light shielding plate. A position sensor (not shown) is provided. In addition, an encoder (not shown) for detecting the rotation angle (phase) and rotation speed of the printing drum 33 is fixed to the end plate flange. The stationary member of the casing side plate is provided with an encoder sensor (not shown) composed of a transmissive optical sensor with the outer periphery of the encoder sandwiched therebetween. The home position sensor and the encoder sensor constitute rotational position detecting means 115 shown only in FIG. 7 for detecting the rotational position of the printing drum 33.

Detected means / member for detecting presence or absence of a master 8b that has been made on the outer periphery of the printing drum 33, that is, whether or not the plate has been made, is detected on a part of the outer periphery of the printing drum 33 A sensor reaction member (not shown) is installed. As the sensor reaction member, for example, a black sensor pattern as a light absorbing member is used, as in the technique disclosed in, for example, Japanese Patent No. 2901082 (Japanese Patent Laid-Open No. 3-193351).
On the other hand, in the position near the printing drum 33 near the printing drum 33 in the plate discharging device 62 and at a position facing a sensor reaction member (not shown) on the outer peripheral surface of the plate cylinder, the master 8b that has been subjected to the plate-making operation A plate arrival detection sensor 73 is disposed as a plate arrival detection means for detecting whether or not the plate has been deposited on the top. The plate arrival detection sensor 73 is a plate-made product having a surface that reflects light (the surface of a thermoplastic resin film), for example, in the same manner as the technology disclosed in Japanese Patent No. 2901082 (Japanese Patent Laid-Open No. 3-193351). A light emitting element as a light emitting means for reflecting light on the surface of the master 8b, and a light receiving element as a light receiving means for receiving the reflected light from the surface of the master 8b that has been subjected to plate making; This is a known device that detects the presence or absence of the master 8b on the black sensor pattern.

The press roller 54 is configured by integrally fixing an elastic body such as rubber having oil resistance to a metal press roller shaft, and is provided extending in the axial direction of the printing drum 33. The press roller 54 is formed so that its lateral width is substantially the same as the lateral width of the printing drum 33. The press roller 54 is rotatably supported at one end of a pair of printing pressure arms (not shown) arranged with substantially the same shape and the same phase on the near side and the far side of the paper surface. The printing pressure arm pair is fixed to a printing pressure arm shaft (not shown) that is rotatably supported by the casing side plate pair by a predetermined angle, and is oscillated by contact / separation means (not shown).
The press roller 54 is displaced by the contact / separation means between a printing position in pressure contact with the outer peripheral surface of the printing drum 33 and a non-printing position away from the printing position. The contacting / separating means has a known configuration including a printing pressure cam that rotates in synchronization with the rotation of the printing drum 33 and a tension spring (not shown) as an urging means.

  As described above, the plate feeding means for winding the master-made master 8b around the outer peripheral surface of the printing drum 33 is the printing drum provided with the master feeding means 7, the second stepping motor 26A for driving the master feeding means 7, and the clamper 35. 33, mainly composed of the clamper motor and the main motor 40 for driving them.

  In FIG. 7, as a main drive circuit of the plate feeding / drum device 32, a stepping motor drive circuit (not shown) for driving a second stepping motor 26A which is a control target drive means of the plate feeding / drum device 32 is provided. A motor drive circuit (not shown) for driving the main motor 40 as the control target drive means and a motor drive circuit (not shown) for driving the clamper motor as the control target drive means are provided. These are collectively referred to as a printing unit drive circuit 79.

  The paper feeding device 47 contacts the paper feeding tray 48 that can stack and lift the paper P so as to be lifted and the paper P stacked on the paper feeding tray 48 and separates the paper P one by one. 51, a sheet feeding unit 46 that feeds toward the nip portion 51, and after receiving the leading end of one sheet P conveyed by the sheet feeding unit 46 and forming a predetermined deflection at the leading end, A registration roller pair 51 serving as a registration means that feeds the press roller 54 in a timely manner, and a paper feed roller 49 provided to form a sheet conveyance path between the separation roller 50 and the registration roller pair 51. A pair of upper and lower guide plates 52 and 53 as guide means for guiding the paper P fed by the separation roller 50 and the registration roller pair 51 in the paper transport direction X is provided.

The paper feed tray 48 is provided with a drive device (not shown) including a paper feed tray lifting / lowering motor and a wire type lifting / lowering mechanism (not shown) that moves the paper feeding tray 48 up and down. The upper level always comes into contact with the paper feed roller 49 with a predetermined pressing force (pressing force capable of transporting the paper P), that is, in contact with the increase / decrease of the paper P with a pressing force within a range in which the paper P can be transported. It is moved up and down while maintaining the state. In the paper feed tray 48, a pair of side fences (not shown) for positioning and aligning both side edges of the paper P according to the paper size are disposed so as to be movable in the paper width direction Y.
The paper feed tray 48 includes a plurality of paper width detection sensors (for example, transmissive optical sensors) that detect the width size of the paper P in conjunction with the movement of the pair of side fences in the paper width direction Y. And a plurality of paper size detection sensors 110 configured by a plurality of paper length detection sensors (for example, including reflection type optical sensors) for detecting the length size of the paper P in the paper conveyance direction X are provided. Yes.

The paper feed means 46 contacts the uppermost paper P on the paper feed tray 48 and feeds the paper P toward the nip portion of the registration roller pair 51, and the paper fed from the paper feed roller 49 The separation roller 50 is configured to separate P one by one by a cooperative action with the separation member 50 </ b> A and feed the P toward the nip portion of the registration roller pair 51.
The paper feed roller 49 is formed integrally with the paper feed roller shaft, and one end of the paper feed roller shaft is located on the left and right sides of the paper transport direction X in the paper feed device 47 (the back side and the near side of the paper surface in FIG. 1). ) Is rotatably supported by one of a pair of sheet feeding side plates fixedly mounted on the sheet. The surface of the paper feed roller 49 is formed of at least a high friction resistance member such as rubber. A toothed paper feed roller pulley (not shown) is attached to one end of the paper feed roller shaft. Between the paper feed roller shaft and the paper feed roller pulley, a one-way clutch for rotating the paper feed roller 49 so as to transport the paper P only in the paper transport direction X, that is, rotating only in the clockwise direction (see FIG. (Not shown) is provided.

The separation roller 50 is formed integrally with the separation roller shaft, and one end portion of the separation roller shaft is rotatably supported on one of the pair of sheet feeding side plates. The surface of the separation roller 50 is formed of at least a high friction resistance member such as rubber. A toothed separation roller pulley (not shown) is attached to one end of the separation roller shaft. Between the separation roller shaft and the separation roller pulley, a one-way clutch (not shown) for rotating the paper feed roller 49 so as to convey the paper P only in the paper conveyance direction X is disposed. A toothed belt is stretched between the separation roller pulley and the paper feed roller pulley, and the separation roller 50 and the paper feed roller 49 are in a rotational driving force transmission relationship.
The separation member 50 </ b> A has a member called a separation pad that is made of rubber or resin having a high friction coefficient with respect to the paper P and can be brought into contact with the paper feed roller 49. The separation pad is urged in a direction to be pressed against the separation roller 50 by a compression spring (not shown) as an urging means.

In the vicinity of the separation roller pulley, a paper feed motor (not shown) as a paper feed driving means for rotationally driving the separation roller 50 and the paper feed roller 49 is fixed to the paper feed side plate. The paper feed motor is composed of, for example, a stepping motor as a motor driven by pulse input, and a toothed paper feed motor pulley (not shown) is fixed to the output shaft. A toothed paper feed motor belt (not shown) is suspended between the separation roller pulley and the paper feed motor pulley. Thus, the separation roller 50, the paper feed roller 49, and the paper feed motor are in a rotational driving force transmission relationship between the paper feed motor belt, the belt, and the one-way clutches.
Each of the upper and lower resist rollers 51 is formed integrally with each registration roller shaft, and both end portions of each registration roller shaft are rotatably supported by the pair of sheet feeding side plates. A toothed registration roller pulley (not shown) is attached to one end of the lower registration roller shaft.
The lower registration roller 51 is supported by the sheet feeding side plate through the registration roller shaft so as not to move and to rotate freely. The upper registration roller 51 is provided so as to be able to contact and separate via a registration roller contacting / separating means (not shown) so as to contact the lower registration roller 51 at a predetermined timing.
Below the lower registration roller 51, a registration motor (not shown) is provided as a registration driving means for rotationally driving the lower registration roller 51, and is fixed to the sheet feeding side plate. The registration motor includes, for example, a stepping motor as a motor driven by pulse input, and a toothed registration motor pulley (not shown) is fixed to the output shaft. A toothed registration motor belt (not shown) is stretched between the registration roller pulley and the registration motor pulley. Thus, the lower registration roller 51 and the registration motor are in a rotational driving force transmission relationship via the registration motor belt.
The guide plates 52 and 53 are fixed to a sheet feeding side plate pair disposed in the stencil printing apparatus main body 2.
Near the upper side of the guide plate 52 near the upper registration roller 51, a paper detection sensor 112 for detecting that the paper P has been sent out from the registration roller 51 is disposed. The paper detection sensor 112 is composed of, for example, a reflective optical sensor.

  In FIG. 7, main drive circuits of the paper feed device 47 include motor drive circuits for driving the paper feed tray lifting / lowering motor, the paper feed motor, and the registration motor, which are control target drive means of the paper feed device 47. These are collectively referred to as a sheet feeding unit drive circuit 77.

The plate discharging device 62 includes an upper plate discharging member 63, a lower plate discharging member 64, a plate discharging box 65, and the like.
The upper plate discharging member 63 includes a driving roller 67 and a driven roller 68 that are rotationally driven by a plate discharging motor (not shown) as driving means, and a rubber belt 69 that is an endless belt stretched between the rollers 67 and 68. Yes. The drive roller 67 is rotationally driven clockwise in FIG. 1 by a plate removal motor (not shown) serving as a plate drive means, so that the rubber belt 69 rotates in the direction of the arrow in FIG. The lower plate discharging member 64 includes a driving roller 67, a driving roller 70 connected by a gear (not shown), a driven roller 71, and a rubber belt 72 including an endless belt stretched between the rollers 70 and 71. ing. The driving roller 70 is rotationally driven by the plate discharging motor through the driving roller 67 and a gear (not shown), so that the rubber belt 72 rotates in the direction of the arrow in FIG.
The lower plate discharge member 64 is movable in the left-right direction around the central axis of the drive roller 67, and is moved in the left-right direction by known moving means (both not shown) as drive means. As a result, the rubber belt 72 on the drive roller 70 side of the lower plate discharging member 64 moves while abutting along the outer peripheral surface of the drive roller 67 via the rubber belt 69, and moves to the position shown in FIG. 1 and the outer peripheral surface of the printing drum 33. The position of contact is selectively occupied.
Near the drive roller 67 of the lower rubber belt 69, a plate discharge detecting sensor 113 for detecting whether or not the used master 8c is normally peeled and conveyed by the upper plate discharging member 63 and the lower plate discharging member 64 is disposed. Yes. The discharged plate detection sensor 113 is composed of, for example, a reflective optical sensor.

The plate removal box 65 stores a used master therein and is detachably provided to the casing side plate pair. The plate discharging box 65 is provided with a reciprocating swing type compression plate 66 for pushing the used master carried by the upper plate discharging member 63 and the lower plate discharging member 64 into the plate discharging box 65. The compression plate 66 is reciprocally oscillated by a plate-removable compression motor (both not shown) as a drive means.
As described above, the plate discharging means for discharging the used master 8c on the printing drum 33 mainly includes the upper plate discharging member 63, the lower plate discharging member 64, the moving means, and the plate discharging motor.

  In FIG. 7, as the main drive circuit of the plate discharging apparatus 62, there are provided the motor drive circuits of the plate discharging motor, the moving means, and the plate discharging compression motor, which are the control target driving means of the plate discharging apparatus 62. Collectively, it is referred to as a discharge plate drive circuit 75.

  The paper discharge device 56 is provided so as to be close to the outer peripheral surface of the printing drum 33, and peels off the printed paper from the outer peripheral surface, and conveys the printed paper peeled off by the peeling claw 55 while sucking it. And a discharge tray 61 as described above.

  The peeling claw 55 is provided in the vicinity of the downstream in the printing nip portion formed by the press roller 54 being in pressure contact with the outer peripheral surface of the printing drum 33. The peeling claw 55 is adjacent to the outer peripheral surface of the printing drum 33 by a known peeling claw displacing means (not shown) having a cam and a spring that are driven to rotate in synchronization with the rotation of the printing drum 33. Non-peeling to avoid contact between a peeling position for forcibly peeling printed paper from the master 8b on the plate 33 and a clamper 35 arrangement portion protruding from the outer peripheral surface of the printing drum 33 apart from the peeling position It is configured to be displaceable between positions.

The paper discharge conveying means is mainly composed of a driven roller 57, a driving roller 58, an endless belt 59, a suction fan 60, and the like.
The driven roller 57 and the driving roller 58 are rotatably supported by the pair of casing side plates, and each of the rollers 57 and 58 has a plurality of openings on the surface and is divided into a plurality in the paper width direction. An endless belt 59 is stretched over. The drive roller 58 is driven to rotate counterclockwise in the figure by a paper discharge motor (not shown) as drive means, and this rotational force is transmitted to the driven roller 57 via the endless belt 59. A suction fan 60 incorporating a fan drive motor (not shown) is disposed inside a casing disposed near the lower portion between the rollers 57 and 58. The suction fan 60 generates a downward air flow in the figure by the rotation thereof, and sucks the printed paper on the surface of the endless belt 59.
Near the lower end of the upper endless belt 59, a paper discharge detection sensor 114 is provided for counting the number of printed sheets by detecting passage of printed paper.

  In FIG. 7, the main drive circuit of the paper discharge device 56 includes a motor drive circuit (not shown) for driving the paper discharge motor, which is a control target drive means of the paper discharge device 56, and the control target drive means. A motor drive circuit (not shown) for driving a fan drive motor of the paper delivery / conveying means is provided, and these are collectively referred to as a paper delivery unit drive circuit 78.

The operation panel 85 will be described with reference to FIG.
The operation panel 85 is disposed on one side of the upper part of the document reading device 9. As shown in FIG. 2, the operation panel 85 includes a plate making start key 86, a printing start key 87, a test printing key 88, a numeric keypad group 89, a mode clear key 91, an enter key 92, four direction keys (cursor keys) 93, A clear / stop key 94, selection setting keys (function keys) 95a, 95b, 95c, and 95d, a liquid crystal display unit 98 including an LCD (liquid crystal display device), and the like are provided.

The plate making start key 86 functions as a starting means for starting and setting a series of steps (operations) from image reading of the document 20 to plate discharging, plate making, plate feeding, plate printing and paper discharge. Have
The print start key 87 is pressed when the stencil printing apparatus 1 performs a printing operation. When the stencil printing apparatus 1 enters a print standby state and various printing conditions are set, the printing start key 87 is pressed to perform a printing operation. Is done.
The trial printing key 88 is pressed when the stencil printing apparatus 1 performs the trial printing, and only one sheet is printed by pressing the trial printing key 88 after various conditions are set. The numeric keypad group 89 is used for inputting numerical values such as the number of printed sheets.

A mode clear key 91 is pressed to clear various modes and return to the initial state. The enter key 92 has an up key, a down key, a left key, and a right key when setting numerical values and the like at various settings. When the image position is adjusted during image editing, This is pressed when selecting a numerical value or item at the time of setting.
The clear / stop key 94 is pressed when the operation of the stencil printing apparatus 1 is stopped or when the numerical value is cleared.

  The liquid crystal display unit 98 has a function as display / notification means for displaying / notifying various information. The liquid crystal display unit 98 has a hierarchical display structure. By selecting and pressing selection setting keys 95a, 95b, 95c, and 95d provided below the liquid crystal display unit 98, the document type, paper type, scaling, and print image are displayed. It is possible to change to various modes such as position adjustment and to set in each mode. In addition, the liquid crystal display unit 98 displays the status of the stencil printing apparatus 1 such as “can be made / printed” and “set in confidentiality mode” as shown in FIG. As will be described later, a display of a confidentiality mode setting screen specific to the present embodiment, warnings such as plate-making or discharge jam, paper feed or paper discharge jam, supply instructions for supplies such as paper, master, and ink are also displayed. .

In this embodiment, as an initial state when a power switch (not shown) for supplying power to each device and each part of the stencil printing apparatus 1 is turned on and turned on, the liquid crystal display unit 98 has a “plate making” as shown in FIG.・ You can print ... The security mode is set. ”The initial screen is displayed. That is, a liquid crystal driving circuit (not shown) is controlled by a command from the control device 100 (CPU 101) shown in FIG. 7 so that the screen of the liquid crystal display unit 98 becomes the initial screen display shown in FIG. The mode is set.
In the initial screen display shown in FIG. 3, the selection setting keys 95a, 95b, 95c, and 95d are appropriately selected and pressed to switch to the security mode setting screen A shown in FIG. 5, or the security mode shown in FIG. It can be switched to the setting screen B. Further, any one of the modes 1 to 3 in the display state of the security mode setting screen A shown in FIG. 5 and the mode 1 or 2 in the display state of the security mode setting screen B shown in FIG. It is also configured to be able to be selected and set using the direction key 93 and the enter key 92, or using the numeric keypad group 89 and the enter key 92.
Accordingly, the four-direction key 93, the numeric keypad group 89, the enter key 92, and the selection setting keys 95a, 95b, 95c, and 95d have a function as mode selection setting means for selecting whether to execute the confidentiality mode.

  To cancel the confidentiality mode setting state, the selection setting keys 95a, 95b, 95c, and 95d in FIG. 4 are appropriately selected and pressed to switch to the display screen shown in FIG. In addition, it is configured so that it cannot be canceled unless the same number / numerical value as the password set in advance using the enter key 92 is input / set. Accordingly, the selection setting keys 95a, 95b, 95c, and 95d, the numeric keypad group 89, and the enter key 92 have a function as a confidentiality mode release unit in this embodiment.

The security mode setting means for setting the security mode unique to the present invention is set in advance as in the initial screen display of the liquid crystal display unit 98 shown in FIG. 3 when the stencil printing apparatus 1 is in the initial state. Of course, for example, a dedicated “confidentiality mode setting key” may be provided on the operation panel, and the user can arbitrarily set as necessary.
Although not shown in FIG. 2 and the like, the operation panel 85 registers continuous keys that are pressed when performing the plate making operation and the printing operation continuously, and registers and calls up frequently performed operations. There are also provided various known keys such as a program key to be pressed when printing, a printing speed setting key, and a display unit composed of 7 segment LEDs (light emitting diodes) for mainly displaying numbers such as the number of printed sheets. .

A main control configuration of the stencil printing apparatus 1 will be described with reference to FIG.
In FIG. 7, the control device 100 has a function and configuration as control means for controlling the document reading operation, the plate discharging operation, the plate making / plate feeding operation, the paper feeding operation, the printing operation, and the paper discharge operation of the stencil printing apparatus 1. The control device 100 includes a CPU 101 (central processing unit) having arithmetic and control functions, an I / O (input / output) port (not shown), a ROM 102 (read-only storage device), a RAM 103 (read / write storage device), a battery, and the like. The microcomputer includes a timer (not shown) and the like backed up in (1) and connected by a signal bus (not shown).

  The control device 100 is provided in a control board arrangement unit (not shown) in the stencil printing apparatus 1. The CPU 101 of the control device 100 (hereinafter, sometimes simply referred to as “control device 100” for the sake of simplicity) includes various signals from the operation panel 85 and the various sensors provided in the stencil printing apparatus 1. A liquid crystal driving circuit (not shown) for driving the liquid crystal display unit 98 of the operation panel 85, a reading unit driving circuit 74, a plate removal based on a detection signal from the rotational position detecting means 115 and the operation program called from the ROM 102 Control unit connected to the sheet drive circuit 75, plate making section drive circuit 81, cutter drive circuit 82, master transport section drive circuit 83, printing section drive circuit 79, paper feed section drive circuit 77, paper discharge section drive circuit 78, etc. In addition to having the function of controlling the operation of each of the driving means described above and the image signal processing device 44 and the like to control the overall operation of the stencil printing apparatus 1, And a control function of the symptoms specific later.

A supplementary description will be given of the optical information of the document, the A / D conversion device 43, the image signal processing device 44, the image memory 45, and the control device 100 shown in FIG.
The image reading unit 19 of the document reading device 9 reads the image of the document 20 as optical information for document reflection, and an analog image signal related to the image data of the document 20 photoelectrically converted by the CIS (contact image sensor) 14 is a stencil. The data is transmitted to an A / D conversion device 43 provided on a control board (not shown) of the printing apparatus main body 2. The A / D converter 43 receives the analog image signal and converts it into a digital image signal related to the image data of the document 20. A digital image signal related to the image data of the document 20 converted by the A / D conversion device 43 is transmitted to an image signal processing device 44 provided on the control board, where conversion processing (for stencil printing) And a binary digital image signal (hereinafter sometimes simply referred to as “digital image signal”) related to the converted image data of the document 20. This digital image signal is transmitted to the image memory 45 by the image signal processing device 44, and stored and recorded in the image memory 45 as a digital image signal.

As described above, the image signal processing device 44 has a function as an image processing unit that converts the image data of the document 20 acquired by the document reading device 9 for stencil printing via the A / D conversion device 43. As is well known, for example, as a digital image signal (converted image data of the document 20) transmitted by the image signal processing device 44 after being subjected to conversion processing for stencil printing, it is applied to, for example, black pixels in binary image data. The corresponding “1” is a digital image signal related to the melt perforation of the thermoplastic resin film of the master 8a, and the “0” corresponding to the white pixel is a digital image signal not related to the melt perforation of the thermoplastic resin film of the master 8a. is there.
The image memory 45 has a function as converted image data recording means for storing a digital image signal (converted image data of the document 20) that has been subjected to conversion processing for stencil printing by the image signal processing device 44 and transmitted.
The image memory 45 has a configuration and a storage capacity for storing a digital image signal corresponding to at least one plate-making image, and is, for example, a backup power source (not shown) as a broad RAM described in the related art. It consists of backed up RAM (SRAM) and flash memory.

The image signal processing device 44 performs serial communication with the control device 100 and transmits signals necessary for controlling the plate-making part driving circuit 81 and the like. The image signal processing device 44 receives the digital image signal from the A / D conversion device 43, performs signal processing corresponding to at least one plate-making image, and outputs it as a digital image signal to the image memory 45, In addition, while sequentially calling digital image signals corresponding to at least one plate-making image stored once in the image memory 45, the image amount of the plate-making image for one plate to be formed on the master 8a is detected and recognized, and thermal It has a function of controlling the plate making section drive circuit 81 provided with a head drive circuit. The plate making unit drive circuit 81 has a function of driving the thermal head 22 in response to a command from the CPU 101.
In the present embodiment, for the sake of convenience, the image signal processing device 44 is connected to the plate making unit drive circuit 81 via the control device 100 having a plate making control device (not shown). Since the data amount of the digital image signal sent to the thermal head 22 is large, the image signal processing device 44 is generally connected to the plate making unit drive circuit 81 via a plate making control device (not shown). .

On the other hand, as shown in FIG. 7, the stencil printing apparatus 1 includes a PC (personal computer) 200 as an example of a computer, an I / F (interface device) (not shown), and an image signal developing device 42 arranged on the control board. Via the communication cable (not shown) so as to transmit a digital image signal as converted image data subjected to conversion processing for stencil printing to the image memory 45.
As described above, the PC 200 is communicably connected to the stencil printing apparatus 1, and constitutes a stencil printing apparatus network system in which the stencil printing apparatus 1 operates based on a signal from the PC 200.
The image signal developing device 42 has a function as image processing means for performing conversion processing (including mirror image conversion processing) necessary for stencil printing on digital image data transmitted from the PC 200. In the digital image signal (converted image data from the PC 200) transmitted after being subjected to conversion processing for stencil printing by the image signal developing device 42, for example, “1” corresponding to a black pixel in binary image data. It is a digital image signal related to the melt perforation of the thermoplastic resin film of the master 8a, and “0” corresponding to the white pixel is a digital image signal not related to the melt perforation of the thermoplastic resin film of the master 8a.

The control device 100 (CPU 101) drives the thermal head 22 via the plate making unit drive circuit 81 based on the start signal from the plate making start key 86 and the converted image data (digital image signal) recorded in the image memory 45. At the same time, the first stepping motor 23A is driven and controlled via the master transport unit drive circuit 83 to operate the platen roller 23, the transport drive roller 30 and the transport driven roller 31 to perforate and transport the master 8a. Then, the converted image data recorded in the image memory 45 is erased via the image signal processing device 44, thereby having a function as a first control means for executing the confidentiality mode.
The control device 100 (CPU 101) sets the “confidentiality mode” by pressing the selection setting keys 95a to 95d (mode selection setting means) for selecting / setting whether or not to execute the confidentiality mode related to the first function. When it is set to be valid, it has a function as a second control means for executing the confidentiality mode related to the first function based on the signal.

Further, the control device 100 (CPU 101), based on the start signal from the plate making start key 86 and the converted image data (digital image signal) recorded in the image memory 45, the thermal head 22 via the plate making unit drive circuit 81. And the first stepping motor 23A is driven and controlled via the master transport unit drive circuit 83 to operate the platen roller 23, the transport drive roller 30 and the transport driven roller 31 to punch the master 8a The second stepping motor 26A is driven and controlled via the master conveying unit driving circuit 83 to operate the feeding driving roller 26 and the feeding driven roller 27, and the clamper motor via the printing unit driving circuit 79. By controlling the drive of the main motor 40, the clamper 35 And the printing drum 33 is actuated to plate the master 8b that has been subjected to plate making on the outer peripheral surface of the printing drum 33, and after receiving a signal relating to the normal plate finishing from the plate detecting sensor 73, the image memory 45 By deleting the converted image data recorded in the image data, it has a function as a third control means for executing the confidentiality mode.
The control device 100 (CPU 101) sets the “confidentiality mode” by pressing the selection setting keys 95a to 95d (mode selection setting means) for selecting / setting whether or not to execute the confidentiality mode according to the third function. When it is set to be valid, it has a function as a fourth control means for executing the confidentiality mode related to the third function based on the signal.

Further, the control device 100 (CPU 101), based on the start signal from the plate making start key 86 and the converted image data (digital image signal) recorded in the image memory 45, the thermal head 22 via the plate making unit drive circuit 81. And the first stepping motor 23A is driven and controlled via the master transport unit drive circuit 83 to operate the platen roller 23, the transport drive roller 30 and the transport driven roller 31 to punch the master 8a The second stepping motor 26A is driven and controlled via the master conveying unit driving circuit 83 to operate the feeding driving roller 26 and the feeding driven roller 27, and the clamper motor via the printing unit driving circuit 79. By controlling the drive of the main motor 40, the clamper 35 And the printing drum 33 is operated to plate the master 8b that has been subjected to plate making on the outer peripheral surface of the printing drum 33, an abnormal plate-forming defect from the plate-detecting sensor 73 (for example, a clamping error or a master jam) ) Is received, the converted image data recorded in the image memory 45 is not erased, and when the recovery plate making is performed after completion of the plate-making failure processing, the confidentiality mode is canceled and the image memory 45 is released. On the basis of the converted image data (digital image signal) recorded on the plate, the thermal head 22 is driven and controlled through the plate making unit drive circuit 81 to perform perforating plate making. It has a function as a control means.
The control device 100 (CPU 101) performs “security protection release mode” by pressing the selection setting keys 95a to 95d (mode selection setting means) for selecting / setting whether to execute the security release mode according to the fifth function. "Is set to be effective, it has a function as a sixth control means for executing the confidentiality mode according to the fifth function based on the signal.

The ROM 102 stores and stores in advance an operation program for the entire stencil printing apparatus 1 and necessary related data. The operation program and related data are appropriately called by the CPU 101.
The RAM 103 has a function of temporarily storing calculation results of the CPU 101, a function of storing data signals and ON / OFF signals set and input from various keys and various sensors on the operation panel 85 as needed.

Based on the above-described configuration, the operation including the operation procedure of the stencil printing apparatus 1 in the present embodiment will be described in detail with reference to the flowcharts of FIGS. 8 and 9 and the operation diagrams of FIGS.
(Operation example 1)
An operation example 1 using the function as the first control means of the control device 100 (CPU 101) will be described. In the first operation example, the control device has substantially the same contents as those normally performed in the prior art from step S1 to step S12 in the flowchart shown in FIG. 8 and from step S12 to step S19 in the flowchart shown in FIG. 100 (CPU 101) is added with an operation related to the security mode unique to the present embodiment, which is exhibited by the function as the first control means.
Since this operation example 1 is performed under the control of the control device 100 (CPU 101), when explaining detailed operations such as activation, operation, and stop of actuators (control target drive means) such as various motors and various solenoids. An expression such as based on a command or a command signal from the control device 100 (CPU 101) is omitted as much as possible. In each figure, regarding the arrow display indicating the rotation direction of various rollers and various rollers, the driving side is mainly indicated by a solid line and the driven side is indicated by a broken line. The same applies to an operation example described later.

  FIG. 1 shows an initial state after the power switch (not shown) is turned on. As shown in FIG. 1, the stencil printing apparatus 1 has an initial state in which the front end of the master 8 a of the master roll 8 in a state where the master support member 21 is detachably mounted and set in the plate making and writing apparatus 3 is the transport drive roller 30. Occupies a plate-making standby position that slightly protrudes in the master conveyance direction X1 from the nip portion between the roller and the conveyance driven roller 31, and in the plate feeding / drum device 32, the clamper 35 of the printing drum 33 is located obliquely to the left in FIG. The sheet feeding device 47 occupies a lower limit position in which the uppermost sheet P stacked on the sheet feeding tray 48 does not come into contact with the sheet feeding roller 49 as indicated by a solid line. Yes.

When plate making / printing according to the image of the document 20 is performed, the user places the document 20 on the document table 10 as shown in FIG. The document set is completed by abutting the front end of the document 20 against the nip formed by the document transport roller 11 and the document transport roller 12.
Next, in step S <b> 1 of FIG. 8, when the user presses the plate making start key 86 on the operation panel 85, a start signal is generated and input to the CPU 101 of the control device 100. As a result, first, the stepping motor 11A of the document reading device 9 is activated (starts rotating), so that at least the document transport roller 11 rotates counterclockwise and the document transport roller 12 rotates in a clockwise direction. Then, the conveyance of the document 20 is started. At this time, the other apparatus portions, that is, the plate discharging device 62, the plate making / writing device 3, the plate feeding / drum device 32, etc., have not started to operate, and occupy the plate discharging standby position and the plate making standby position. As the document transport roller 11 and the document transport roller 12 rotate as described above, the document discharge roller 16 having a driving force transmission relationship with the rotation rotates counterclockwise, and the document discharge roller 17 rotates in a clockwise direction. To do.
Further, when the paper feed tray lifting / lowering motor is turned on based on the start signal, the paper feed tray 48 is raised and the uppermost paper P comes into contact with the paper feed roller 49, so that a paper feed position (not shown) is provided. When the control device 100 determines that the uppermost paper P is ready to be fed due to the detection sensor being turned on, the paper feed device 47 enters a paper feed standby state.

  The leading edge of the document 20 is conveyed by the rotation of the document conveying roller 11 and the document conveying roller 12, and as shown in FIG. 10, the leading edge of the document 20 is the arrangement position of the document leading edge detection sensor 13, that is, the leading edge of the document 20 is the leading edge detection of the document. When the position detected by the sensor 13 is reached and the document leading edge detection sensor 13 turns on the leading edge of the document 20 (with detection), a detection presence signal is input to the CPU 101 of the control device 100. At this time, the control device 100 calls a program and related data stored in advance in the ROM 102 on the basis of a detection presence signal from the document leading edge detection sensor 13, thereby conveying a predetermined amount of the document 20, and the leading edge of the document 20 Is conveyed to a predetermined position (position immediately before the leading edge of the document 20 reaches the reading position 14A of the CIS 14), the document conveying roller 11 temporarily stops the conveying operation of the document 20.

  After the transport operation of the document 20 is temporarily stopped, the stepping motor 11A is driven to rotate again, and at least the document transport roller 11 rotates counterclockwise, and the document transport roller 12 is driven to rotate clockwise, and the document 20 The image of the original 20 thus conveyed is read by the CIS 14 and the optical information (reflected light related to the image information) of the read original 20 is photoelectrically converted by the CIS 14 and the original is read. 20 pieces of image information are acquired as image data. The analog image signal related to the image data of the document 20 subjected to photoelectric conversion processing by the CIS 14 is transmitted to the A / D conversion device 43, where the analog image signal related to the image data of the document 20 is converted into a digital image signal. Is done. The digital image signal related to the image data of the document 20 converted by the A / D conversion device 43 is transmitted to the image signal processing device 44, where a conversion process necessary for stencil printing, that is, a plate (master) is created. Are converted into an optimal form (for example, a digital image signal and a mirror image), and the digital image signal related to the converted image data is recorded in the image memory 45 (steps S2 to S3).

Further, in parallel with the acquisition of the image data in the document reading device 9, when the arrival detection sensor 73 detects that the used master 8 c is present on the printing drum 33, as shown in FIG. 11. Then, a plate discharging operation is performed by the plate discharging device 62, and the used master 8c on the printing drum 33 used in the previous printing is peeled and discarded (steps S7 to S8).
The details of the plate removal operation in the plate removal apparatus 62 are as follows. First, after the clamper motor of the printing unit driving circuit 79 is operated and the clamper 35 is opened / expanded, the moving means of the plate discharging unit driving circuit 75 and the main motor 40 of the printing unit driving circuit 79 are operated. The driving rollers 67 and 70 and the printing drum 33 are rotationally driven, and the lower plate discharging member 64 moves to the printing drum 33 side, and the rubber belt 72 located on the outer peripheral surface of the driving roller 70 comes into contact with the used master. Then, the used master 8c scooped up from the outer peripheral surface of the printing drum 33 by the rotation of the printing drum 33 in the arrow direction in FIG. 1 and the movement of the rubber belt 72 is nipped and conveyed by the lower plate discharging member 64 and the upper plate discharging member 63. Then, it is peeled off from the outer peripheral surface of the printing drum 33. The used master 8 c that has been peeled off is discarded into the plate release box 65 and then compressed by the reciprocating rocking motion of the compression plate 66.

In step S9, when the plate removal operation is completed, the plate making operation is started while calling the digital image signal related to the converted image data of the document 20 recorded in the image memory 45 (step S4).
In step S5, first, the first stepping motor 23A is started (rotation drive start) to rotate the platen roller 23, and then the second stepping motor 26A is rotationally driven for a short time at a predetermined timing. The master 8a is conveyed until the plate making position is occupied by the operation of the master delivery means 7 while the front end of the master 8b is guided by the guide plate 29. At the same time as the transfer of the leading end of the master 8a to the plate-making position, the plate-making writing device 3 starts a plate-making writing operation (plate-making operation). That is, the plurality of heating elements of the thermal head 22 are energized in a pulsed manner in the main scanning direction to selectively generate heat, and the first stepping motor 23A is driven to rotate, whereby the platen roller 23, the master transport The means 6 starts operating, and the thermoplastic resin film portion of the master 8a is selected in accordance with the digital image signal (converted image data) while the master 8a is pulled out from the master roll 8 and is transported in the master transport direction X1. Heat drilled.
At this time, since the second stepping motor 26A has stopped driving, the pre-made master 8b on which the image information conveyed in the master conveying direction X1 by the platen roller 23 and the master conveying means 6 is written is the guide plate. It is stored while forming a deflection above 29.

  On the other hand, even after all the used master 8c is peeled off from the outer peripheral surface of the printing drum 33, the printing drum 33 continues to rotate by the rotation drive of the main motor 40, and the clamper 35 is substantially right as shown in FIG. Rotates to a predetermined plate feed standby position located beside and stops. When the printing drum 33 stops at the plate feeding standby position, the clamper motor of the printing unit drive circuit 79 is operated to release the clamper 35, and the stencil printing apparatus 1 enters the plate feeding standby state (steps S10 to S11).

  Then, when the second stepping motor 26A that has been stopped for a predetermined time is restarted, the master-making master 8b in which the image information has been written maintains the formation of the deflection by the start of the operation of the master delivery means 7. While being guided, it is inserted between the clampers 35 that are expanded with respect to the stage while being guided by the master guide plate 28. When it is determined that the number of steps of the first stepping motor 23A reaches a certain set value and the leading end of the master 8b that has been subjected to plate making has reached between the stage and the clamper 35, the clamper is operated by the operation of the opening / closing means. 35 is closed, and the leading end of the master 8b that has been subjected to plate making is sucked and held between the stage and the clamper 35.

After clamping the front end of the master 8b, the printing drum 33 resumes rotating in the direction of the arrow in FIG. The platen roller 23, the master transport unit 6, and the master delivery unit 7 transport the plate to be wound around the outer peripheral surface of the printing drum 33.
When the first stepping motor 23A is rotationally driven by a predetermined number of steps, the cutting means 5 is activated when it is determined that the plate making to the master 8a and the transfer of the set amount (one plate) of the premade master 8b have been completed. Then, the master 8b having been subjected to the plate making is cut, and the rotation of the platen roller 23 and the master conveying means 6 is stopped by stopping the rotation of the first stepping motor 23A.

  At this time, the control device 100 (CPU 101) completes the plate making to the master 8a and the conveyance of the set amount (one plate) of the pre-made master 8b by rotating the first stepping motor 23A for a predetermined number of steps. And all of the converted image data used for the plate making recorded in the image memory 45 is erased via the image signal processing device 44, so that the confidentiality mode unique to the operation example 1 is automatically executed. .

Then, until the rear end of the master plate 8b that has been cut is drawn out of the plate-making writing device 3 by the rotation of the printing drum 33 and is completely wound around the outer peripheral surface of the printing drum 33, the printing drum 33 is almost When the sensor reaction member arranged at the outer peripheral surface position of the printing drum 33 occupies a position facing the plate-making detection sensor 73 after one rotation, the master 8c that has been made by the plate-making detection sensor 73 is normal. It is judged whether or not it has been wound / fixed. When the plate-making detection sensor 73 is turned on and it is detected that the pre-made master 8c is normally wound and plate-worn, the winding of the pre-made master 8b around the printing drum 33 is completed. This completes the plate feeding operation. Thereafter, plate printing in which the paper P passes through the paper supply unit, the printing unit, and the paper discharge unit and is discharged and stacked on the paper discharge tray 61, test printing performed as appropriate, and normal regular printing are performed (step). S12, steps S18 to S19).
Details of plate printing, normal regular printing operation, and the like are the same as those described in paragraphs “0105” to “0110” of the above-mentioned Japanese Patent Application Laid-Open No. 2004-9320, and the gist of the present invention is not too much. Since there is no relation and it can be easily implemented by those skilled in the art from the configuration of each device and each part described above, the description thereof is omitted.

As described above, according to the operation example 1 of the present embodiment, the converted image data converted for stencil printing by the image signal processing device 44 is recorded in the image memory 45, and the thermal head 22 is based on the converted image data. After the master 8a is punched and made by the platen roller 23, the converted image data recorded in the image memory 45 used for making the plate is automatically deleted, so that the converted image data is read from the image memory 45 by a third party. Is called, and plate-making and printing are not performed, so confidentiality can be maintained.
The converted image data converted for stencil printing by the image signal processing device 44 is not limited to the operations in steps S3 and S4, and is simultaneously transferred to a plate making control unit (not shown) in the control device 100, and at the same time the image memory 45. May be transferred for storage.

(Operation example 2)
An operation example 2 using the function as the third control means of the control device 100 (CPU 101) will be described. Operation example 2 was used for plate making recorded in the image memory 45 after receiving an ON signal related to the end of normal plate formation from the plate arrival detection sensor 73 in step S12 as compared to operation example 1. By automatically erasing all of the converted image data, a security mode unique to the operation example 2 is automatically executed.

  Therefore, according to the operation example 2 of the present embodiment, the converted image data converted for stencil printing by the image signal processing device 44 is recorded in the image memory 45, and the thermal head 22 and the platen are recorded based on the converted image data. The master 8a is punched and made by the roller 23, the master 8b is made on the outer peripheral surface of the printing drum 33 by the plate feeding means, and the plate making detection sensor 73 detects the completion of the plate making and then used for making the plate. By automatically erasing the converted image data used for the plate making recorded in the image memory 45, the converted image data is not called from the image memory 45 by a third party and is not made / printed. Therefore, not only can confidentiality be maintained, but if a problem occurs during plate making or plate making or after plate making, the corresponding conversion It is possible to leave the image data

(Operation example 3)
An operation example 3 using functions as the second and fourth control means of the control device 100 (CPU 101) will be described. In the operation example 3, as compared with the operation examples 1 and 2, the converted image data recorded in the image memory 45 before the user presses the plate making start key 86 in step S1 is stored in the master 8a. The main difference is that it is possible to select whether or not to enable the “confidentiality maintenance mode” to be erased after perforating plate making or after plate arrival detection by the plate arrival detection sensor 73.
When it is desired to maintain confidentiality of the image data information, the user uses the selection setting keys 95a, 95b, 95c, and 95d in the initial screen display state of the liquid crystal display unit 98 of the operation panel 85 shown in FIG. Set "Secure mode" to valid. At this time, it may be possible to select whether the converted image data is deleted after the plate making is completed or whether the converted image data is deleted after the plate is detected.

For example, in the initial screen display state of the liquid crystal display unit 98, when the user presses the selection setting key 95a, the screen display of the liquid crystal display unit 98 is switched to the confidentiality mode setting screen A shown in FIG. After that, any one of “1: data erase after plate making”, “2: data erase after plate setting” or “3: OFF (off)” is selected with the four-way key 93 and the enter key 92, or the numeric keypad group 89. Using the enter key 92, it is sufficient to select and set the input in black and white reversed display. The example of the confidentiality mode setting screen A in FIG. 5 shows a case where “2: delete data after landing” is selected and set by inverting the display in black and white.
When the “confidentiality mode” according to the operation example 3 of the present embodiment is enabled, as described in the operation example 1, the converted image data converted by the image signal processing device 44 for stencil printing is used. The image data is recorded in the image memory 45, and the master 8a for one plate is punched and made by the thermal head 22 and the platen roller 23 based on the converted image data. All of the converted image data used for the plate making recorded in the process is erased.

  For example, when confidentiality is not performed, “3: OFF (off)” is selected and set, and the “confidentiality mode” is disabled by setting the “confidentiality mode” to be invalid. "Can be released. Accordingly, in this case, naturally, the converted image data remains recorded in the image memory 45 even after the plate making or after the arrival of the plate is detected, so that the converted image data is called from the image memory 45 at a later time as desired by the user. Then, plate-making / printing can be performed again, or plate-making / printing can be performed by processing the converted image data.

(Operation example 4)
An operation example 4 using functions as the fifth and sixth control means of the control device 100 (CPU 101) will be described. The operation example 4 relates to the operation shown in steps S12 to S17 and step S4 shown in FIG. When a master jam occurs in the plate-making writing device 3 or a master jam occurs in the plate feeding unit, it is necessary to perform plate-making (recovery plate-making) again. In this case as well, the user (or administrator) ) Can be selected according to the security level required.
For example, in the initial screen display state of the liquid crystal display unit 98, when the user presses the selection setting key 95c, the screen display of the liquid crystal display unit 98 is switched to the confidentiality mode setting screen B shown in FIG. After that, either “1: security keeping mode ON in recovery plate making (ON)” or “2: security keeping mode in recovery plate making OFF (OFF)” is performed with the four-way key 93 and the enter key 92, or By using the numeric keypad group 89, the enter key 92, and the like, it is sufficient to select and set the input in black and white reversed display. The example of the confidentiality mode setting screen B in FIG. 6 shows a case where “1: confidentiality mode ON (recovery) in recovery plate making” is selected and set in black and white reversed display.

In other words, when complete security is required, the selection setting keys 95a, 95b, 95c, and 95d are used from the initial screen of the operation panel 85 shown in FIG. The “confidentiality mode” can be set to be valid.
In step S12 shown in FIG. 9, in the case where there is an abnormality in which the plate-making detection sensor 73 remains off and the plate-making master 8b has not been normally fed / plated to the printing drum 33, that is, plate-making writing is performed. When the jam of the master 8b that has been made in the master conveyance path of the apparatus 3 or the jam of the master 8b due to a clamping mistake occurs, the control device 100 (CPU 101) is based on the OFF signal from the plate arrival detection sensor 73. Causes the liquid crystal display unit 98 of the operation panel 85 to display a jam occurrence via the liquid crystal driving circuit.
When the “confidentiality mode” is set at the time of this jam processing, for example, in the switching display state of the confidentiality mode setting screen B shown in FIG. 6, “1: confidentiality mode ON (ON) in recovery plate making” is selected. When set, the converted image data recorded in the image memory 45 is automatically deleted.

Next, in step S14, it is determined whether or not the user has performed jam processing. This is because, when the jam processing is performed properly and normally, for example, by the control device 100 (CPU 101) based on the on / off signal from the plate arrival detection sensor 73 when the printing drum 33 is rotated to the home position. To be judged.
After the jam processing operation is completed and the return operation is performed, the image data capture is displayed again on the liquid crystal display unit 98 on the operation panel 85, and the display / announcement is performed so that the operation from the beginning is performed. .

  When it is difficult to fetch image data again when the landing detection sensor 73 is detected off due to the jam and it is troublesome to import the image data again, it is recorded in the image memory 45 when the arrival detection sensor 73 is detected to be off. The converted image data is not automatically deleted and remains stored. At the time of such recovery plate making, in order to call the converted image data recorded in the image memory 45, the screen display of the liquid crystal display unit 98 is displayed in accordance with a command from the control device 100 (CPU 101) in step S15. The screen display automatically switches to the screen display shown in FIG.

This password (for example, “6789”) is a recording means for storing and recording a first code for performing recovery plate making using the converted image data recorded in the image memory 45 (converted image data recording means). As a ROM 102, a PROM (not shown), a flash memory, or the like.
Therefore, for example, a password as a second code (for example, “6789”) which is the same as a first registered code as the first code and shared only by a person who should protect confidential information (for example, “6789”) may be set and input using the numeric keypad group 89. In step S17, it is determined whether or not the pre-registered personal identification number (first code) and the personal identification number (second code) set and input by the numeric keypad group 89 are identical and coincide with each other. If yes, the process returns to step S4 to perform recovery plate making by calling the converted image data recorded in the image memory 45.

  In particular, when confidentiality is not necessary, as described above, the “confidentiality mode” during jam processing is performed using the selection setting keys 95a, 95b, 95c, and 95d from the operation panel 85 shown in FIGS. Can be set to be invalid, and the user can select and set “2: OFF the security mode in recovery plate making” in the switching display state of the security mode setting screen B shown in FIG. To do. In this case, it is possible to call the converted image data recorded in the image memory 45 unconditionally at the time of recovery plate making as is known.

As shown in FIG. 7, digital image data from the PC 200 is converted as converted image data that has been subjected to conversion processing for stencil printing via an I / F (interface device) and an image signal expansion device 42 (not shown). Even when the digital image signal is transmitted to the image memory 45 and recorded, the stencil printing apparatus 1 sets or cancels the “confidentiality mode” in accordance with the operation examples 1 to 5 of the present embodiment described above. Of course it is also possible.
In addition, a virtual program similar to that of the operation panel 85 on the stencil printing apparatus 1 side can be set on the PC 200 side, and the “confidentiality mode” can be set or canceled by software on the PC 200 side. It is.

  As described above, the present invention has been described with respect to specific embodiments and operation examples including examples, but the configuration and operation of the present invention are not limited to the above-described embodiments and operation examples. It will be apparent to those skilled in the art that various embodiments and examples can be configured within the scope of the present invention, depending on the necessity and application, etc. It is.

It is a partial cross section front view of the whole stencil printing apparatus showing one embodiment of the present invention. It is a top view of the operation panel used for the stencil printing apparatus of FIG. FIG. 3 is a plan view showing a display when a security mode is set on the liquid crystal display unit of the operation panel of FIG. It is a top view which shows the input request display of the PIN code to the liquid crystal display part of the operation panel of FIG. It is a top view which shows the example of a confidentiality mode setting screen displayed on the liquid crystal display part of the operation panel of FIG. FIG. 6 is a plan view showing an example of a confidentiality mode setting screen different from FIG. 5 displayed on the liquid crystal display unit of the operation panel of FIG. 2. It is a block diagram which shows the control structure of the stencil printing apparatus of FIG. 3 is a flowchart showing an operation sequence of a main part of the stencil printing apparatus of FIG. 1. FIG. 9 is a flowchart continued from FIG. 8. FIG. It is a partial cross section front view showing operation | movement of the stencil printing apparatus of FIG. FIG. 11 is a partial cross-sectional front view illustrating the operation subsequent to FIG. 10. FIG. 12 is a partial cross-sectional front view illustrating the operation subsequent to FIG. 11.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 3 Plate-making writing apparatus 4 Plate-making means 7 Master sending means (Structure of plate feeding means)
8a Master 8b Master-made master 9 Document reader 14 CIS (contact image sensor)
20 Document 22 Thermal head (plate making means)
32 Plate feeding / drum device 33 Printing drum 35 Clamper (constituting plate feeding means)
36 Ink supply means 42 Image signal developing device (image processing means)
43 A / D conversion device 44 Image signal processing device (image processing means)
45 Image memory (converted image data recording means)
62 Plate discharge device 73 Plate arrival detection sensor (plate arrival detection means)
74 Reading section drive circuit 75 Discharge section drive circuit 79 Printing section drive circuit 81 Plate making section drive circuit 82 Cutter drive circuit 83 Master transport section drive circuit 85 Operation panel 89 Numeric keypad group (mode selection setting means, second code generation means)
92 Enter key (mode selection setting means, second code generation means)
93 Four-way key (mode selection setting means)
95a to 95d selection setting key (mode selection setting means)
100 Control device (first to sixth control means, control means)
101 CPU (first to sixth control means, control means)
102 ROM (recording means)
200 PC (an example of a computer)
P paper (example of sheet-like recording medium)
X1 Master transport direction X Paper transport direction

Claims (7)

Image processing means for converting the acquired image data for stencil printing, converted image data recording means for recording the converted image data converted for stencil printing by the image processing means, and the converted image data recording means A plate making means for making a master on the basis of the converted image data recorded on the printing plate; a printing drum in which a pre-made master is wound around its outer peripheral surface and ink is supplied to the pre-made master on the outer peripheral surface; In a stencil printing apparatus comprising a plate-feeding means for plate-making a finished master on the outer peripheral surface,
The stencil is capable of executing a security mode for erasing the converted image data recorded in the converted image data recording means after punching and making a master on the basis of the converted image data by the plate making means. Printing device. Image processing means for converting the acquired image data for stencil printing, converted image data recording means for recording the converted image data converted for stencil printing by the image processing means, and the converted image data recording means A plate making means for making a master on the basis of the converted image data recorded on the printing plate; a printing drum in which a pre-made master is wound around its outer peripheral surface and ink is supplied to the pre-made master on the outer peripheral surface; In a stencil printing apparatus comprising: a plate feeding means for plate-making a finished master on the outer peripheral surface; and a plate-making detecting means for detecting whether or not a master made by plate making is plated on the outer peripheral surface;
Based on the converted image data by the plate-making means, the master is made by punching, the plate-making master is made to plate on the outer peripheral surface, and after the plate-making detection means has detected the completion of the plate-making, A stencil printing apparatus, wherein a confidentiality mode for erasing the converted image data recorded in the converted image data recording means is executable.   2. The stencil printing apparatus according to claim 1, wherein it is possible to select whether or not to execute the confidentiality mode.   4. The stencil printing apparatus according to claim 1, further comprising mode selection setting means for selecting / setting whether to execute the confidentiality mode.   3. The stencil printing apparatus according to claim 2, wherein it is possible to select whether or not to execute the confidentiality mode.   6. The stencil printing apparatus according to claim 2, further comprising mode selection setting means for selecting / setting whether to execute the confidentiality mode. A stencil printing apparatus network system comprising: a stencil printing apparatus according to any one of claims 1 to 6; and a computer communicably connected to the stencil printing apparatus, wherein the stencil printing apparatus operates based on a signal from the computer. There,
7. A stencil printing apparatus network system, wherein image data to be acquired is transmitted from the computer to the image processing means according to claim 1.

Images