JP2010137523A - Printing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stencil printing device which makes it possible of course that the content of confidential information of a printed matter and a master having finished platemaking on a plate cylinder cannot be seen by a person other than a secret maintenance mode configurator until not completely finishing a printing working concerning a secret maintenance mode which the secret maintenance mode configurator has established, and enables secret maintenance mode related information to be grasped by other users with no user-friendliness worsened. <P>SOLUTION: The stencil printing device 1 includes a secret maintenance key 78 which establishes a secret maintenance mode. When the secret maintenance mode is established by the secret maintenance key 78, the platemaking of information about the secret maintenance mode configurator or the like is made possible as secret related information relevant at a secret maintenance mode at information platemaking sections 34c or 34d of an area 34b outside platemaking in a master 34 having finished platemaking, and the printing of only the information platemaking sections 34c or 34d of the master 34 in which secret related information has been plate-made is made possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a printing apparatus including a stencil printing apparatus that performs printing by winding a master-made master around an outer peripheral surface of a plate cylinder.

  Conventionally, digital thermal stencil printing is known as a simple printing method. This is because a thermal head in which fine heating elements are arranged in a row is brought into contact with a heat-sensitive stencil master (hereinafter referred to as “master”) formed by laminating a thermoplastic resin film and an ink-permeable porous support. After forming the punched image by heating and punching the thermoplastic resin film portion of the master according to the image information while transporting the master by a master transporting means such as a platen roller while energizing the heating element in a pulsed manner The plate-made master is wound around the plate cylinder, and the printing paper is pressed against the outer peripheral surface of the porous cylindrical plate cylinder by pressing means such as a press roller. Ink is exuded from the portion, and the ink is transferred to a printing paper to obtain a printed image.

In the stencil printing apparatus that performs the stencil printing, there has been proposed a stencil printing apparatus capable of setting the confidentiality mode when it is not desired to know the printed matter and the contents of the master that has been made by the stencil other than the person who performs printing (for example, (See Patent Documents 1 and 2).
That is, the invention described in Patent Document 1 includes a printing unit having a porous cylindrical plate cylinder that is driven to rotate by winding a plate-making master around an outer peripheral surface, and plate-making the master and making the plate-making master the plate. A plate making section wound around the cylinder, a plate removing section for peeling and discarding a used master from the outer peripheral surface of the plate cylinder, a printing start key (printing starting means), and a plate making start key (plate making starting means). And when the printing start key is pressed, the printing unit is operated to perform printing, and when the plate making start key is pressed, the used master is removed from the outer peripheral surface of the plate cylinder by the plate discharging unit. After removal, in the stencil printing apparatus in which a new plate-making master is wound on the outer peripheral surface of the plate cylinder by the plate-making unit, confidentiality is maintained when it is not desired to know the contents of the printed matter other than the person who performs printing. When the secret key is pressed, and only when the secret key is pressed, only the input from the plate making start key is validated, and any key other than the plate making start key is pressed in the security mode. In this case, the security holding mode is continued, and control means for releasing the security holding mode only when the plate making start key is pressed is provided, and the plate cylinder is detachable from the stencil printing apparatus main body. The control means prohibits detachment of the plate cylinder from the stencil printing apparatus main body when the security key is pressed.

  The invention described in Patent Document 2 includes a drum unit that includes a printing drum around which a prepressed plate is wound, a drum unit that is detachable from the apparatus main body, and an original reading unit that reads an image of an original. A plate making unit having a plate making means for making a plate and detachable from the apparatus main body, and a plate making unit detachable from the apparatus main body having storage means for storing a used plate peeled off from the printing drum In a printing apparatus that includes at least one unit other than the drum unit alone of the units and forms a printed image by pressing paper against a pre-made plate on the printing drum. Set the security mode when you do not want to know the information of the prepressed plate on the printing drum and the information of the printed matter. When the security mode is set by the setting means and the security mode setting means, the at least one unit is provided for each of the at least one unit to prevent the unit from being detached from the apparatus main body. And a locking means.

Japanese Patent No. 3566367 Japanese Patent Laying-Open No. 2005-153224

However, in the techniques described in Patent Documents 1 and 2, when a user other than the security mode setting person tries to use the stencil printing apparatus in which the security mode is set by the security mode setting person, Other than being in the holding mode setting state, there is a problem that it is not easy to use and is not easy to use.
On the other hand, information related to the security mode setting state (hereinafter also referred to as “security mode related information”) is displayed / notified on the operation panel or the like, and a person who passes in front of the stencil printing apparatus reports the information. It is not good for security to see.
Really, other users who want to use the stencil printing machine want to be able to see the confidentiality mode related information.

  Therefore, the present invention has been made in view of the above-described circumstances, and by a person other than the security mode setting person, the printing work related to the security mode set by the security mode setting person is not completely completed. Of course, the confidential information / contents of the preprinted master on the printed matter and the plate cylinder cannot be seen, and it does not deteriorate the usability for other users and is related to the confidentiality mode. The main object is to realize and provide a printing apparatus including a stencil printing apparatus capable of grasping information.

In order to solve the above-described problems and achieve the above-mentioned object, the invention according to each claim employs the following characteristic means / invention specific items (hereinafter referred to as “configuration”).
The invention described in claim 1 includes a printing unit having a plate cylinder that winds a master made on the outer peripheral surface, and a plate making and feeding unit that makes the master and winds the master made on the plate cylinder. A plate discharging unit for peeling off and discarding a used master from the outer peripheral surface of the plate cylinder, a printing starting unit for generating a printing starting signal for starting the printing operation by the printing unit, and the plate discharging unit. A plate making start signal generating a plate making start signal for starting a plate making start signal for starting a plate making operation by performing a plate making start signal for starting a plate making and feeding operation. Printing is performed, and after the used master is removed from the outer peripheral surface of the plate cylinder by the plate discharge unit based on the plate release start signal and the plate making start signal, the plate making unit supplies the plate cylinder. New pre-made on the outer surface In the printing apparatus that winds the star, the security holding mode setting means for setting the security holding mode is set when it is not desired to know the printed matter and the contents of the master that has been made by anyone other than the person who performs printing. When the security setting mode is set by the mode setting means, it is possible to make plate making of the security related information related to the security holding mode in the non-plate making area of the master and the plate making of the master where the security related information is made. Only the outer area portion can be printed.

  According to a second aspect of the present invention, in the printing apparatus according to the first aspect, the secret-related information is information relating to a secrecy mode setting person.

  According to a third aspect of the present invention, in the printing apparatus according to the second aspect, the security-related information is a security mode setting time and a security mode release possible time set by the security mode setting person. To do.

  According to a fourth aspect of the present invention, in the printing apparatus according to the second or third aspect, the confidentiality mode setting person sets the confidentiality related information, and the master that has made the confidentiality related information is out of the plate making When only the area portion is set to be printable, the input of the plate making start signal is invalidated.

  According to a fifth aspect of the present invention, in the printing apparatus according to any one of the first to fourth aspects, the secret-related information that is set so as to print only the area outside the plate making area of the master on which the secret-related information is made. It has a print setting means.

  According to a sixth aspect of the present invention, in the printing apparatus according to the second aspect, the security mode release means for canceling the setting of the security mode includes the plate making activation means, and the plate making activation signal from the plate making activation means. When the setting of the confidentiality mode is canceled by the above, information related to the confidentiality mode setting person is automatically canceled.

  According to a seventh aspect of the present invention, in the printing apparatus according to the third aspect, the confidentiality mode canceling unit for canceling the setting of the confidentiality mode includes the plate making starting unit, and the security mode setting person sets the When the confidentiality mode setting time is exceeded, only the input of the plate making activation signal from the plate making activation means is valid.

According to the present invention, it is possible to realize and provide a printing apparatus including a novel stencil printing apparatus by solving the above problems. The effects of the invention for each claim are as follows.
According to the first to fourth aspects of the present invention, with the above configuration, the security-preserving mode setter can completely remove the master-printed master that has been kept secret by another user before the printing operation is completely completed. Disappears. Furthermore, since the information of the security mode setting person can be grasped by other users, misunderstanding is not given to other users, and the usability is not deteriorated.

  According to the invention described in claim 5, according to the configuration described above, not only can other users who really want to use the stencil printing apparatus be able to acquire information on the security mode setting person, but the use understanding level thereof can be increased. Ease of use is also improved.

  According to the sixth aspect of the invention, leakage of personal information can be prevented by automatically canceling information related to the security mode setting person with the above configuration.

  According to the seventh aspect of the invention, with the above configuration, when the security mode setting time set by the security mode setting person is exceeded, only the input of the plate making activation signal from the plate making activation means is valid. Even if the mode setter forgets to release the confidentiality mode, other users cannot use it.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention including examples will be described with reference to the drawings. In each embodiment and the like, components (members and components) having the same function, shape, and the like will be omitted by giving the same reference numerals after being described once. 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, parentheses are given to the reference numerals to distinguish them from those of the embodiments and the like.

An embodiment of the present invention will be described with reference to FIGS.
First, an overall configuration of a stencil printing apparatus 1 as an example of a printing apparatus according to the present embodiment will be described with reference to FIG. In FIG. 1, a stencil printing apparatus 1 is mainly composed of a printing unit 2, a plate-making plate feeding unit 3, a paper feeding unit 4, a plate discharging unit 5, and a paper discharging unit 6.

The printing unit 2 mainly includes a plate cylinder 7, an ink supply unit 8, and a press roller 9.
The plate cylinder 7 is made of a well-known material formed in a porous cylindrical shape with the same material as described in paragraph “0013” of Patent Document 1. The plate cylinder 7 is rotationally driven in the direction of arrow A in FIG. 1 by a plate cylinder drive motor 12 as a plate cylinder drive means.
On the outer peripheral surface of the plate cylinder 7, a mesh screen (not shown) formed of the same material and the same number of meshes as described in paragraph "0013" of Patent Document 1 is wound about 1 to 3 layers. Further, on the outer peripheral surface of the plate cylinder 7, a stage unit 10 extending in the same direction as the axis of the plate cylinder 7 and a clamper 11 as a master holding unit that clamps the leading end of the master together with the stage unit 10 are disposed. ing. The clamper 11 is swingably supported by the support shaft 11a, and is provided so as to be openable / closable / contact / separable with respect to the stage unit 10.

An ink supply unit 8 is disposed inside the plate cylinder 7. The ink supply means 8 is mainly composed of an ink supply pipe 13, an ink roller 14, and a doctor roller 15.
The ink supply pipe 13 also serves as a support shaft of the plate cylinder 7, and one end of the ink supply pipe 13 is rotatably supported by a casing side plate (not shown) of the stencil printing apparatus 1. An infinite number of small holes for supplying ink to the inside of the plate cylinder 7 are formed in the surface of the ink supply pipe 13. An ink roller 14 and a doctor roller 15 are arranged below the ink supply pipe 13. The ink roller 14 is rotatably supported on a side plate (not shown) of the plate cylinder 7 with its outer peripheral surface maintained a slight gap with the inner peripheral surface of the plate cylinder 7. The outer peripheral surface of the ink roller 14 contacts the inner peripheral surface of the plate cylinder 7 when the press roller 9 is pressed against the outer peripheral surface of the plate cylinder 7, and the ink supplied from the ink supply pipe 13 is transferred to the inner surface of the plate cylinder 7. Supply to the peripheral surface.

  A rotatable doctor roller 15 is disposed in the vicinity of the ink roller 14. The doctor roller 15 is disposed so that a slight gap is formed between the outer peripheral surface of the doctor roller 15 and the outer peripheral surface of the ink roller 14, and a wedge-shaped ink reservoir 16 is formed in the vicinity of the outer peripheral surface with the ink roller 14. Form. The ink supplied from the ink supply pipe 13 to the ink reservoir 16 passes through the gap between the ink roller 14 and the doctor roller 15 to form a uniform layer and is supplied to the outer peripheral surface of the ink roller 14.

The drive mechanism of the plate cylinder 7 will be described with reference to FIG. The drive mechanism of the plate cylinder 7 has the same configuration as that shown in FIG.
Each end of the plate cylinder 7 is fixed to the outer periphery of a pair of disc-shaped end plates 7a, 7b. On the outer wall surface of one end plate 7 a of the plate cylinder 7, a gear 17 centered on the ink supply pipe 13 is fixed to the ink supply pipe 13 with a slight gap. The tip of the ink supply pipe 13 (not shown) penetrates the gear 17 and is supported by a casing side plate (not shown) of the stencil printing apparatus 1. A dog 25, which is a light shielding member extending in the axial direction of the plate cylinder 7, for detecting the rotational position of the plate cylinder 7 is fixed to an outer wall surface of the end plate 7a near the outer peripheral edge of the plate cylinder 7. Further, the ink supply pipe 13 outside the one end plate 7a and the other end plate 7b has a substantially U-shape for carrying the plate cylinder 7 so as to straddle the plate cylinder 7 in the axial direction (not shown). A handle is attached. A handle portion (not shown) on the other end plate 7b side is provided with an ink supply device (not shown) for replenishing the ink supplied to the ink supply pipe 13.

  The gear 17 includes a gear portion 17a and a flange portion 17b. The gear portion 17a is disposed so as to be positioned on the end plate 7a side, and a part of the flange portion 17b is cut away. In the vicinity of the gear 17, there is a gear portion 18 a that meshes with the gear portion 17 a and a flange portion 18 b, and a gear that is fixed to one end portion of a support shaft 18 c that is rotatably supported by the casing of the stencil printing apparatus 1. 18 is arranged. The gear 18 is disposed so that the flange portion 18b is positioned on the end plate 7a side, and a part of the flange portion 18b is cut out in the same manner as the flange portion 17b. The gear 17 and the gear 18 can be engaged and disengaged in the axial direction of the plate cylinder 7 (also in the direction of attaching and detaching the plate cylinder) only in a state where the notch portions match each other. The gear portions 17a and 18a are sandwiched between the flange portions 17b and 18b so that the engaged state cannot be released. The plate cylinder 7 is configured so that a handle (not shown) can be engaged with a rail member (not shown) provided in the casing of the stencil printing apparatus 1, and the notches of the flange portions 17b and 18b are aligned. In the state shown in the figure, it can be removed from the stencil printing apparatus 1 by being extracted in the direction indicated by the white arrow in the figure.

  A home position sensor 26 and a confidential mode position sensor 27 each including a light transmission type photosensor are disposed on the circular orbit of the dog 25 that moves with the rotation of the plate cylinder 7. Each of the sensors 26 and 27 is attached to the casing of the stencil printing apparatus 1, and outputs a signal to the control means 80 described later when the dog 25 passes through the detection unit. The home position sensor 26 is disposed so as to detect the dog 25 at a position where the notch of the flange portion 17b and the notch of the flange portion 18b coincide. The position where the notch portion of the flange portion 17b and the notch portion of the flange portion 18b coincide with each other corresponds to the plate feeding position where the clamper 11 expands and waits in FIG. It is set as a position.

  A toothed pulley 19 is fixed to the other end of the support shaft 18c. The toothed pulley 19 is connected to a toothed pulley 20 fixed to an output shaft end of a plate cylinder drive motor 12 attached to the casing of the stencil printing apparatus 1 by a timing belt 21. An encoder 22 is fixed to the output shaft of the plate cylinder drive motor 12, and the rotation angle of the plate cylinder drive motor 12 is detected by a pulse detection sensor 23 attached to the casing of the stencil printing apparatus 1, The detected angle signal passes through a pulse counter and a comparator (not shown) and is then input to the control means 80 described later.

  With the above-described configuration, the rotational driving force of the plate cylinder drive motor 12 is transmitted to the output shaft, the toothed pulley 20, the timing belt 21, the toothed pulley 19, the support shaft 18c, the gear 18, and the gear 17 in this order, The plate cylinder 7 is driven to rotate about the ink supply pipe 13.

  A press roller 9 is disposed below the plate cylinder 7 so as to face the ink roller 14. The press roller 9 is provided so that its outer peripheral surface can be brought into and out of contact with the outer peripheral surface of the plate cylinder 7 within a predetermined range by a press roller contact / separation mechanism 155 shown in FIGS. The press roller 9 presses a printing sheet fed from a sheet feeding unit 4 to be described later against a master that has been made on the plate cylinder 7 to form a printing image on the printing sheet. The press roller contact / separation mechanism 155 will be described later.

  A plate making and feeding unit 3 for making a master plate and winding the pre-made master around the plate cylinder 7 is disposed on the upper right side of the printing unit 2. The plate making and feeding unit 3 is mainly composed of a master storing means 28, a plate making means 29, a cutting means 30, a conveying means 31 and the like.

The master storage means 28 is mainly composed of a master roll support member 33 and the like fixed to the plate making side plate pair of the casing of the stencil printing apparatus 1. The master roll support member 33 rotatably supports a core portion 34Aa of a master roll 34A obtained by winding the master 34 in a roll shape.
A plate making means 29 is disposed on the left side of the master storage means 28. The plate making means 29 is mainly composed of a platen roller 36, a thermal head 37, and the like as master conveying means. The platen roller 36 is rotatably supported by a pair of plate making side plates of a casing (not shown). The platen roller 36 is rotationally driven by a master transport motor 35 comprising a stepping motor as a master transport drive means.
The thermal head 37 having a large number of heat generating elements is attached to a side plate of a housing (not shown), is urged by a biasing means (not shown), and is detachably provided on the platen roller 36 by a thermal head contacting / separating means (not shown). It has been. The thermal head 37 is pressed against the platen roller 36 by a thermal head contacting / separating means (not shown) during plate making.

On the downstream side of the plate making means 29 in the master transport direction X, a cutting means 30 comprising a fixed blade 30a attached to the housing and a movable blade 30b that rotates relative to the fixed blade 30a is disposed. Drive rollers 31a and 31c that are driven to rotate by the master transport motor 35 on the downstream side in the master transport direction X of the cutting means 30 via drive force transmission means that is connected to the master transport motor 35 and includes a gear train (not shown). , Master conveying means 31 composed of a pair of conveying rollers 31a, 31b, 31c, 31d composed of driven rollers 31b, 31d rotating with the driving rollers 31a, 31c, guide plates 38, 39 for guiding the master, etc. Are arranged respectively.
A plate supplying means for winding the master 34 having been made on the outer peripheral surface of the plate cylinder 7 opens and closes the drive roller 31c, the driven roller 31d, the master transport motor 35, the clamper 11, the plate cylinder drive motor 12, and the clamper 11 (not shown). It consists of opening / closing means and the like.

With reference to FIG. 5, the area | region of the master 34 which can be made with the plate making and supplying part 3 is demonstrated. FIG. 5 is a development view showing a state in which the leading end portion of the master 34 that has been subjected to plate making is clamped by the clamper 11 of the plate cylinder 7 (not shown in the drawing).
As shown in FIG. 5, the stencil printing apparatus 1 including a general stencil printing type integrated stencil printing apparatus can perform stenciling on the master 34 in accordance with image information (image data signal). The “plate making area 34a”, which is a normal area, has been determined, but there is an area for moving the top and bottom of the image before and after the plate making area 34a in the master 34, and in most cases this area is in this part. There is no plate making.
In the present embodiment, when the information plate-making sections 34c and 34d are set using an area for moving the top and bottom of the image existing before and after the plate-making area 34a, and the confidentiality mode described later is set, the confidentiality is maintained. One feature is that information relating to the security mode setting person can be made in the information plate making sections 34c and 34d as the security related information related to the mode. The information plate making sections 34c and 34d belong to a non-plate making area 34b indicated by hatching in FIG. The non-plate making area 34b also exists on the left and right sides (master width direction) of the plate making area 34a.

In FIG. 1, the clamper 11 and the stage unit 10 which are expanded at the plate feeding position (home position) of the plate cylinder 7 between the constituent members of the plate making plate feeding unit 3 and from the nip portions of the pair of conveying rollers 31 c and 31 d. Each distance to the clamping unit is determined, and the platen roller 36 and the driving rollers 31a and 31c constituting the master transport unit are rotationally driven by the master transport motor 35 including a stepping motor. The transport amount (transport distance) and the master 34 can be accurately controlled by the number of pulses (or the number of steps).
Therefore, the plate making to the information plate making sections 34c and 34d in the non-plate making area 34b is easy only by changing the number of pulses applied to the master transport motor 35 and the plate making start timing at the thermal head 37 in the plate making and feeding section 3. Can be pre-made.

  A document reading unit 32 that reads a document image is disposed above the printing unit 2 and above the housing. The document reading unit 32 has a known configuration including an ADF unit 40, a contact glass 41, a fluorescent lamp 42, a mirror group 43, a lens 44, an image reading sensor 45, and the like.

A sheet feeding unit 4 is disposed diagonally to the right of the plate-making plate feeding unit 3. The paper feed unit 4 mainly includes a paper feed tray 46, a paper feed roller 47, a separating unit 48, a registration roller pair 49, and the like.
A paper feed tray 46 as a paper feed tray is supported by the housing so as to be movable up and down in conjunction with increase / decrease of the print paper P loaded on the upper surface thereof. Further, the paper feed tray 46 is provided with a pair of side fences 51 and a printing paper width detection sensor 52 that detects the width of the printing paper P as the pair of side fences 51 moves.

A paper feed roller 47 as a paper feed means is provided so as to contact the uppermost printing paper P on the paper feed tray 46, and is rotationally driven by a drive means (not shown) such as a stepping motor. The sheet feeding roller 47 is connected to the driving roller 48a through driving force transmitting means such as a timing belt and a toothed pulley (not shown). The separating unit 48 includes a driving roller 48a that is rotationally driven by a driving unit (not shown) such as the stepping motor, and a separating roller 48b disposed so as to contact the driving roller 48a. The separating unit 48 is configured to separate only the uppermost sheet when a plurality of printing sheets are pulled out by the sheet feeding roller 47.
The registration roller pair 49 temporarily stops the leading edge of the printing paper P fed by the separating means 48 at the nip portion to correct skew, and then makes a master-making image on the plate cylinder 7 on the plate-making master 7. At a predetermined timing when the printing paper P and the printing paper P coincide with each other, the leading edge of the printing paper P is gripped, and the printing paper P is sent out between the outer peripheral surface of the rotating plate cylinder 7 and the rising press roller 9. It functions as a resist means. In the figure, the lower registration roller 49 is connected to a registration motor 50 formed of a stepping motor via driving force transmission means such as a timing belt and a toothed pulley (not shown), and is rotated by the registration motor 50.

On the left side of the printing unit 2, a plate discharging unit 5 is disposed. The plate discharging unit 5 is mainly composed of an upper plate discharging member 53, a lower plate discharging member 54, a plate discharging box 55, a compression plate 56, and the like.
The upper plate discharging member 53 includes a driving roller 57 and a driven roller 58 that are rotationally driven by a driving unit (not shown), and a rubber belt 59 that is stretched between the rollers. The lower plate discharging member 54 includes a driving roller 57, a driving roller 60 that is connected to a driving roller 57 by a gear (not shown), a driven roller 61, and a rubber belt 62 stretched between the rollers. The lower plate discharge member 54 is provided so as to be movable in the left-right direction by a moving means (not shown) around the support shaft of the drive roller 57, and the outer peripheral surface of the drive roller 60 is in contact with the outer peripheral surface of the plate cylinder 7. It is configured to be separable. The plate removal box 55 has a function of storing a used master therein, and is detachably attached to the housing. Above the discharge box 55, there is disposed a compression plate 56 that is movable up and down and can be moved selectively between a solid line position and a broken line position in the figure by lifting means (not shown).

A paper discharge unit 6 is disposed below the plate discharge unit 5. The paper discharge unit 6 mainly includes a peeling claw 63, a driven roller 64, a driving roller 65, a rubber belt 66, a suction fan 67, a paper discharge tray 68, and the like.
The peeling claw 63 has a function of peeling the printing paper P to which ink has been transferred from the outer peripheral surface of the plate cylinder 7 and is supported by a casing side plate (not shown) so as to be swingable. The peeling claw 63 is a peeling position where the leading end of the printing paper on which the printing image is formed is peeled off from the master made of the plate cylinder 7 with its tip close to the outer peripheral surface of the plate cylinder 7 by swinging means (not shown). And a non-peeling position spaced apart from the peeling position. The peeling claw 63 can be rotated by the above-described swinging means (not shown) so that an obstacle such as the clamper 11 existing on the outer peripheral surface of the plate cylinder 7 can be swung so as not to interfere with the tip thereof. Synchronized.

  The driven roller 64 and the driving roller 65 are rotatably supported on the casing side plate, and a rubber belt 66 having a plurality of openings on the surface is stretched between the rollers. The driving roller 65 is rotationally driven via a driving force transmission means connected to a paper discharge motor (not shown) as a driving means, and this rotational driving force is transmitted to the driven roller 64 via a rubber belt 66. Below the driven roller 64 and the driving roller 65, a suction fan 67 for sucking the printing paper P on which the print image is formed on the surface of the rubber belt 66 is disposed. A paper discharge tray 68 as a paper discharge tray on which the print paper P on which the print image is formed is stacked is disposed downstream of the drive roller 65 in the print paper transport direction. The paper discharge tray 68 is detachably attached to the housing.

With reference to FIG. 3 and FIG. 4, the press roller contact / separation mechanism 155 as a printing pressure range varying means for changing the pressing range of the press roller 9 against the master made on the plate cylinder 7 will be described.
As shown in FIGS. 3 and 4, the press roller contact / separation mechanism 155 mainly includes a cam follower 141, a printing pressure spring 142, a multistage cam 143, press roller locking means (not shown), a moving arm 148, and a step cam 149. ing. By the operation of the press roller contact / separation mechanism 155, the press roller 9 can selectively occupy the separation position shown in FIG. 3 and the press contact position shown in FIG. 1, and the master 34 shown in FIG. Printing corresponding to any one of the normal plate making area 34a and the information plate making portions 34c and 34d.

  The press roller 9 is configured by winding an elastic body such as rubber around a metal shaft portion 9 a and is provided extending in the axial direction of the plate cylinder 7. As shown in FIG. 3, the press roller 9 is rotatably supported by a pair of arm members 120 (the front side of the paper is omitted) at both ends on the front side and the back side of the shaft portion 9a. Each arm member 120 has a substantially L shape and is integrated by a swing shaft 121 attached to a portion in the vicinity of the bent portion. The swing shaft 121 is supported by a casing side plate of the stencil printing apparatus 1 so as to be rotatable within a predetermined angle range, that is, swingable.

  As shown in FIG. 3, on the other end side of each arm member 120 opposite to the one end side on which the press roller 9 is supported, rotatable cam followers 141 are arranged so as to face each other. . Further, in the vicinity of each arm member 120 at the position where the cam follower 141 is disposed, the other end of the printing pressure spring 142 having one end fixed to the housing side plate is attached. With the printing pressure spring 142, one end side and the other end side of each arm member 120 are respectively given a rotational biasing force in the clockwise direction in FIG.

A multistage cam 143 having three cam plates 143A, 143B, and 143C is disposed in the vicinity of the left side of each cam follower 141. Each cam plate 143A, 143B, 143C is fixed to a cam shaft 144 supported at both ends so as to be rotatable on the casing side plate and movable in the paper surface direction of FIG. From the side, a cam plate 143B indicated by a solid line, a cam plate 143A indicated by a broken line, and a cam plate 143C indicated by a two-dot chain line are arranged in this order.
Each of the cam plates 143A, 143B, and 143C has a small-diameter portion (base portion) that is a disc concentric with the cam shaft 144 and a large-diameter portion (convex portion) having the same protruding amount. The small-diameter portion shape 143Ba of the cam plate 143B is only one place in the narrow angle range shown in FIG. 3, and similarly, the small-diameter portion shape 143Ca of the cam plate 143C is only one place in the narrow angle range shown in FIG.
As shown in FIG. 4, the multistage cam 143 is driven by a plate cylinder via a drive gear 145 attached to the camshaft 144 and a transmission gear 147 attached to a support shaft 146 rotatably supported on the casing side plate. The rotational driving force from the motor 12 is transmitted, and the rotational driving force is rotated clockwise in FIG.

  The press roller 9 occupies a separation position shown in FIG. 3 in which the outer peripheral surface of the press roller 9 is separated from the outer peripheral surface of the plate cylinder 7 when any of the large-diameter portions of the cam plates 143A, 143B, 143C comes into contact with the cam follower 141. When the contact between any of the large-diameter portions and the cam follower 141 is released, the outer peripheral surface occupies the press contact position shown in FIG. The cam plates 143A, 143B, and 143C are arranged so that the small diameter portion and the cam follower 141 do not come into contact so that the urging force of the printing pressure spring 142 is completely applied when the press roller 9 occupies the pressure contact position. It is configured.

  The formation range of the small diameter portion of each of the cam plates 143A, 143B, 143C is that the contact range between the press roller 9 and the master 34 that has been pre-pressed by the clamper 11 of the plate cylinder 7 shown in FIG. 5 is the cam plate 143A. The cam plate 143B is formed to have the same range as the information plate-making portion 34c, and the cam plate 143C is formed to have the same range as the information plate-making portion 34d so as to be the normal plate-making area 34a. The intervals between the cam plates 143A, 143B, 143C are set to be sufficiently larger than the plate thickness of the arm member 120.

  3, in the vicinity of the right side of each arm member 120, press roller locking means (not shown) that prohibits the swinging of each arm member 120 in a state where the press roller 9 occupies the separated position is provided. . A press roller locking means (not shown) has a solenoid (not shown), and a state of holding each arm member 120 and a state of releasing the holding are selectively switched by switching on / off of the solenoid (not shown). . A solenoid (not shown) is operated in a state where the cam follower 141 is in contact with any one large diameter portion of each of the cam plates 143A, 143B, 143C.

  As shown in FIG. 4, a moving arm 148 and a step cam 149 are disposed near the lower portion of the cam shaft 144. The moving arm 148 has a substantially L shape, and its bent portion is attached to a support shaft 148a that is rotatably supported by the casing side plate. A roller 148b is attached to one end of the moving arm 148, and a cam follower 148c is rotatably attached to the other end. Furthermore, the other end of the tension spring 150 having one end attached to the housing side plate is attached to a portion between the other end of the moving arm 148 and the bent portion. The moving arm 148 has a support shaft 148a. As shown in FIG. 4, a rotational biasing force in the clockwise direction is applied.

  The roller 148 b is disposed between the discs 144 a and 144 b that are fixed to each other in the middle of the cam shaft 144, and the cam follower 148 c has its peripheral surface contoured by the contour of the step cam 149 by the biasing force of the tension spring 150. It is in pressure contact with the outer peripheral surface. The interval between the discs 144a and 144b is formed to be slightly larger than the diameter of the roller 148b.

  The step cam 149 has three cam portions 149a, 149b, and 149c on the outer peripheral surface of the contour, and is fixed to a support shaft 151 that is rotatably supported by the casing side plate. A gear 154 that meshes with a gear 153 attached to an output shaft of a stepping motor 152 attached to the casing side plate is attached to the support shaft 151. The step cam 149 is rotationally driven in the direction of the arrow in FIG. With this configuration, when the stepping motor 152 operates and the step cam 149 rotates, the moving arm 148 swings about the support shaft 148a, and the roller 148b pushes the disc 144a or the disc 144b, thereby causing the cam shaft 144 to move. Moves in the left-right direction in FIG.

  Each of the cam portions 149a, 149b, and 149c is in contact with the cam follower 148c and the cam portion 149b so that the cam plate 143B can be brought into contact with the cam follower 141 when the cam follower 148c and the cam portion 149a contact each other. When the cam follower 148c comes into contact with the cam follower 149c so that the cam plate 143A comes into contact with the cam follower 141, the cam shaft 144 comes into contact with the cam follower 141. Each is formed in a shape to move the.

With reference to FIG. 6, an operation panel 69 as an operation unit for giving operation instructions to the respective units and apparatuses of the stencil printing apparatus 1 and knowing the operation state will be described. The operation panel 69 is provided on the upper front surface of the casing, and includes a plate making start key 70, a printing start key 71, a test printing key 72, a clear / stop key 73, a numeric key 74, a four-direction key 75, and a printing speed setting key 76. And a screen operation unit 77, a main power switch 79, and a main power indicator 79a each having an LCD (liquid crystal display device) and a touch panel driving device.
As shown in the figure, the operation panel 69 is provided with various keys and display devices other than those described above, but only the main ones used in this embodiment are listed.

The plate making start key 70 functions as plate making starting means for generating a plate making start signal for causing the plate making unit 5 to start the plate making operation and a plate making starting signal for causing the plate making unit 3 to start the plate making operation. The plate making start key 70 also functions as a security mode canceling unit that cancels the security mode setting.
The print start key 71 functions as a print activation unit that generates a print activation signal for causing the printing unit 2 to activate a printing operation, and also includes an out-of-plate area 34b of the master 34 in which the confidential information shown in FIG. It functions as a confidential related information print setting means for setting only the part information plate making part 34c or 34d to be printed.

The LCD display section of the screen operation section 77 displays the operation status of each section / device, the contents to be operated / input by the user (including the security mode setting person), information related to the security mode setting person as confidential information described later, etc. It functions as a display means or a notification means for informing the user (including the person who sets the confidentiality mode). In addition to the screen operation unit 77, a voice guide or the like as a notification unit may be added.
The touch panel of the screen operation unit 77 functions as an operation instruction unit that gives various operation instructions to the respective units and devices. The touch panel of the screen operation unit 77 has a security key 78 as a security mode setting means for setting a security mode when it is not desired to know the printed matter and the contents of the master that has been made by anyone other than the person who performs printing. Is arranged.

The main power switch 79 is used to connect and disconnect the power supply to each of the above-described units / devices of the stencil printing apparatus 1. The main power indicator 79A is composed of LEDs (light emitting diodes). It is a well-known thing which notifies by turning on / off the on / off state.
An output signal from the operation panel 69 is transmitted to the control unit 80, and a command signal from the control unit 80 is transmitted to the above-described units / devices and the LCD display unit of the screen operation unit 77.

  The control configuration of the stencil printing apparatus 1 will be described with reference to FIG. Control means 80 for controlling the operation of the stencil printing apparatus 1 is disposed inside the casing. In the figure, the control means 80 includes a microcomputer having a CPU 85, a RAM 86 as a storage means, a backup RAM 88, a ROM 87, a backup timer (not shown), and the like.

  The CPU 85 reads an image data signal that has been read by the image reading unit 32, processed by the original document image reading circuit 32, and further processed by an image processing device (not shown), and is detected by the pulse detection sensor 23. The angle signal of the plate cylinder drive motor 12 that has passed through a pulse counter and a comparator (not shown), output signals from various keys on the operation panel 69, output signals from the home position sensor 26, and confidential mode position sensor 27 Are output via an input port (not shown). Various input signals are processed based on an operation program stored in the ROM 87, and a main drive circuit that drives and controls the printing unit 2, the sheet feeding unit 4 and the sheet discharging unit 6, and a drive control of the plate-making plate feeding unit 3. The plate making and feeding plate driving circuit (including a thermal head driving circuit for driving and controlling the thermal head 37) and the plate discharging driving circuit for driving and controlling the plate discharging unit 5 are respectively output as operation command signals through an output port (not shown). The

  In the RAM 86, an operation program called from the ROM 87 by the CPU 85 is temporarily written. The written operation program is rewritten by an input from the operation panel 69. In addition, the backup RAM 88 has a function of storing information related to the security mode setting person set / input by the security mode setting person, the security mode setting time, the security mode release possible time, and the like. The backup RAM 88 is backed up by a battery, and the written confidential information (data) is timed by the backup timer even when the main power supply of the stencil printing machine 1 (see the Menin electric switch 79 in FIG. 6) is turned off. It is configured not to be erased within the set confidentiality mode setting time.

The confidentiality mode program written in the RAM 86 cannot be rewritten by input from the operation panel 69 and is erased only when the plate making start key 70 is pressed.
The ROM 87 stores a plurality of operation programs for operating various drive means / actuators arranged in each unit / apparatus of the stencil printing apparatus 1 and a security mode program including the operation flow shown in FIG.

Based on the above configuration, the operation of the stencil printing apparatus 1 will be described below.
First, the operation in the normal mode when the confidentiality key 78 is not used will be described. When a plurality of originals are set on the original placement unit on the ADF unit 40 and the plate making conditions are set by various keys on the operation panel 69 by a user including a security mode setting person, the plate making start key 70 is pressed. A document image is read by the document reading unit 32, and the read image is subjected to image processing by an image signal processing device (not shown) and sent to the CPU 85 as an image data signal.

  In parallel with the image reading operation in the image reading unit 32, the plate discharging unit 5 performs a plate discharging operation for peeling the used master 34 from the outer peripheral surface of the plate cylinder 7. The plate cylinder 7 around which the used master 34 is wound on the outer peripheral surface is rotationally driven by a plate cylinder drive motor 12 that operates according to an operation command signal (hereinafter simply referred to as “command”) from the CPU 85, and FIG. Starts to rotate counterclockwise. Based on the signal from the pulse detection sensor 23, the CPU 85 confirms that the rear end of the used master 34 wound around the outer peripheral surface of the plate cylinder 7 has reached a predetermined plate discharge position corresponding to the drive roller 60. Is determined, the moving means and driving means (not shown) are actuated by a command from the CPU 85 to rotate the driving rollers 57 and 60 and move the lower plate discharge member 54 to the plate cylinder 7 side. When the outer peripheral surface of the driving roller 60 comes into contact with the used master 34 on the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 continues to rotate counterclockwise, and comes into contact with the driving roller 60. The used master 34 that has been scooped up is sandwiched between the lower plate discharging member 54 and the upper plate discharging member 53 and peeled off from the outer peripheral surface of the plate cylinder 7. The peeled used master 34 is transported by the lower plate discharging member 54 and the upper plate discharging member 53 and discarded in the plate discharging box 55, and then compressed by the compression plate 56.

  When all the used masters 34 are peeled from the outer peripheral surface of the plate cylinder 7, the plate cylinder 7 further continues to rotate. When the plate cylinder 7 reaches the home position which is the predetermined plate feeding position shown in FIG. 1 and the dog 25 is detected by the home position sensor 26, the signal is output from the home position sensor 26 to the CPU 85. The CPU 85 receives a signal from the home position sensor 26 and sends a command to the plate cylinder drive motor 12 to stop the rotation of the plate cylinder drive motor 12. When the plate cylinder driving motor 12 stops and the plate cylinder 7 stops at the home position, a command is sent from the CPU 85 to an opening / closing means (not shown), the clamper 11 swings clockwise, and the plate cylinder 7 is shown in FIG. The plate-release operation is completed in the plate-feed standby state.

  When the plate removal operation is completed, the plate making and feeding operation is performed subsequently. When the plate cylinder 7 is in the plate feed standby state, the master transport motor 35 is actuated by a command from the CPU 85, the platen roller 36 and the drive rollers 31a and 31c are rotated, and the master 34 is pulled out from the master roll 34A. When the CPU 85 determines that the image forming area of the master 34 has reached a position corresponding to the heating element of the thermal head 37 based on the number of steps of the master transport motor 35, a command is sent from the CPU 85 and the image data signal is sent to the image data signal. Based on this, the heat generating elements of the thermal head 37 selectively generate heat, and a perforated plate making image is formed on the master 34.

  The pre-mastered master 34 on which the perforated pre-formed image is formed is transported to the clamper 11 by the transport means 31 while being guided by the guide plates 38 and 39. When the CPU 85 determines that the leading end of the master 34 has reached a predetermined position between the clamper 11 and the stage unit 10 based on the number of steps of the master transport motor 35, a command is sent to an opening / closing means (not shown) to cause the clamper 11 to react. It swings in the clockwise direction, and the stage portion 10 and the clamper 11 pinch the leading end portion of the master 34 that has been made. Thereafter, a command is sent from the CPU 85 to the plate cylinder drive motor 12, and the plate cylinder 7 is rotationally driven in the direction A (clockwise direction) in FIG. 1 at the same peripheral speed as the conveyance speed of the master 34. Winding and feeding operations are performed. When the CPU 85 determines that the plate making for one plate has been completed based on the number of steps of the master transport motor 35, the rotation of the platen roller 36 and the drive rollers 31a and 31c is stopped, and the movable blade 30b is rotated. Thus, the master 34 is disconnected. The master 34 that has been cut is drawn out by the rotation operation of the plate cylinder 7, and when the plate cylinder 7 reaches the home position again, the plate cylinder drive motor 12 is stopped by a command from the CPU 85, and the winding and feeding operation is performed. Is completed.

  Subsequent to the plate feeding operation, the printing operation is performed. When the plate cylinder 7 stops at the home position, a press roller locking means (not shown) is actuated by a command from the CPU 85, and the stepping motor 152 of FIG. 4 is actuated to rotate the step cam 149. The cam portion 149b is moved to the cam follower 148c. Abut. As a result, the movable arm 148 is swung around the support shaft 148a, and the cam shaft 144 is moved to a position where the cam plate 143A can come into contact with the cam follower 141. Is released.

  Thereafter, the feed roller 47, the drive roller 48a, the drive roller 65, and the suction fan 67 are driven to rotate by the operation of the stepping motor (not shown) that drives the paper feed roller 47 through the rotational drive of the drive roller 48a. Then, a command is sent from the CPU 85, the plate cylinder driving motor 12 is operated, and the plate cylinder 7 is rotationally driven in the direction A in FIG. That is, by rotation of the paper feed roller 47 and the driving roller 48a, only the topmost print paper P among the plurality of print papers P stacked on the paper feed tray 46 is drawn out, and the print paper The front end of P is abutted against the nip portion of the registration roller pair 49 and temporarily stopped to correct the skew and the like, and then the image area of the plate cylinder 7 of the master 34 that has been wound around the plate cylinder 7 is made. When the CPU 85 determines that the leading end in the rotation direction has reached a position corresponding to the press roller 9 based on a signal from the pulse detection sensor 23, the CPU 85 sends a command to the registration motor 50 to register the resist roller pair 49. Is rotated at a predetermined timing to feed the printing paper P between the plate cylinder 7 and the press roller 9.

At this time, in synchronization with the rotation of the plate cylinder 7, the press roller contact / separation mechanism 155 rotates the cam shaft 144 and the multistage cam 143 provided integrally therewith, and contacts the cam follower 141 as described above. The cam plate 143 </ b> A that has been moved to a position where it can be moved disengages its large diameter portion from the cam follower 141 at the predetermined timing. As a result, the press roller 9 brings its outer peripheral surface into pressure contact with the outer peripheral surface of the plate cylinder 7 by the urging force of the printing spring 142, so that the printing paper P fed from the registration roller pair 49 is pressed by the press roller 9. 7 is pressed by the pre-made master 34.
By this pressing operation, the press roller 9, the printing paper P, the master 34 having been subjected to plate making, and the outer peripheral surface of the plate cylinder 7 are pressed against each other, and the ink supplied to the inner peripheral surface of the plate cylinder 7 by the ink roller 14 is 7, after exuding from the perforated portion of the outer peripheral surface of the plate 7 and the mesh screen, and after filling the outer peripheral surface of the plate cylinder 7 and the porous support of the master 34 that has been subjected to plate making, Transferred to the printing paper P, so-called printing is performed. The printing paper P to which the ink has been transferred is peeled off from the outer peripheral surface of the plate cylinder 7 at the tip of the peeling claw 63 and falls downward, and leftward while being attracted to the upper surface of the rubber belt 66 by the suction force of the suction fan 67. And is discharged onto the discharge tray 68. Thereafter, the plate cylinder 7 is rotated again to the home position and stopped. Through this series of steps, the plate making operation is completed, and the stencil printing apparatus 1 enters a print standby state.

  In the stencil printing apparatus 1 in which the above-described original reading, plate ejection, plate making, plate feeding, and plate making operations are completed and the printing standby state is completed, when the user presses the trial printing key 72, the plate making operation is performed. In the same manner as described above, the topmost printing paper P on the paper feed tray 46 is pulled out by the paper feed roller 47 and the separating means 48, temporarily stopped at the nip of the registration roller pair 49, and from the CPU 85. A command is sent and the plate cylinder drive motor 12 is operated to rotate the plate cylinder 7 at high speed. The registration roller pair 49 feeds the printing paper P between the plate cylinder 7 and the press roller 9 that are rotating at high speed at the same predetermined timing as that of the printing operation. The fed printing paper P is pressed by the press-rolled master 34 on the plate cylinder 7 by the press roller 9 to transfer the ink, and a printed image is formed on the upper surface thereof. Is peeled off from the outer peripheral surface of the sheet, conveyed to the left by the rubber belt 66, and discharged onto the sheet discharge tray 68. The plate cylinder 7 returns to the home position again, and the trial printing operation is completed.

  After confirming the density and position of the printed image by this trial printing, adjusting these with various keys on the operation panel 69 and performing the trial printing again, the number of prints is set with the numeric keypad 74, and the printing speed setting key is appropriately set. When the printing speed is set at 76 and the print start key 71 is pressed, the printing paper P is continuously fed from the paper feeding unit 4 and the printing operation is performed. After the completion of the printing operation for the set number of prints, the plate cylinder 7 returns to the home position again, and the stencil printing apparatus 1 enters the print standby state again.

The operation of the stencil printing apparatus 1 when the security mode setting person sets the security mode using the security key 78 will be described with reference to FIG.
The timing (timing) for setting the confidentiality mode of the present embodiment is basically different from that of Patent Document 1. That is, the security mode setting timing of Patent Document 1 is the same as described above, after completion of the printing operation to obtain a printed material through the steps of plate making, plate feeding, printing, appropriate test printing, and printing, When the contents of the printed matter and the pre-printed master used therefor require confidentiality, they are set by pressing the confidentiality key.
The security mode of this embodiment and the prior art shown in FIG. 8 is a security mode using a security key 78 before making a master plate that requires security, as compared to the security mode setting timing of Patent Document 1 described above. The difference is that the retention mode is set.

  As shown in FIG. 6, the security mode setting person performs an operation for displaying the initial screen related to the security mode setting on the screen operation unit 77. In order to display the initial screen on the screen operation unit 77, for example, the security mode setting persons having the same purpose in order to maintain security by jointly using the stencil printing apparatus 1 can be combined with various keys in advance. It is desirable to call and display with a set service program or with a predetermined personal identification number. Here, for example, a password is input using the numeric keypad 74 of the operation panel 69, and the initial screen of FIG.

  On the initial screen of the screen operation unit 77 shown in FIG. 6, when the security mode setting person touches the security key 78 portion where “security mode setting” is displayed, a signal related to the security mode setting is sent to the CPU 85. Sent. The CPU 85 calls the security mode program from the ROM 87, writes the security mode program in the RAM 86 and sends a signal to the operation panel 69, and the security mode is set by displaying the “security mode setting” key 78 portion in black and white reversed. (Step S1).

When the confidentiality mode is set, the screen automatically switches to the screen operation unit 77 shown in FIG. 9, and “Do you want to enter confidential information?”, “Yes”, “No” (No) ) "Selection screen is displayed (step S2).
In this step S2, when the person who sets the security mode touches the no key 90b, the security mode as described above is set (step S3).

  In other words, the conventional confidentiality mode is a mode set before plate making requiring confidentiality, as described above. In this conventional confidentiality mode, the print start signal from the print start key 71 and the test print start signal from the trial print key 72 are invalidated and not accepted by the CPU 85, but the plate release start signal from the plate making start key 70 and Only the plate making activation signal is validated and received by the CPU 85, and the plate making image of the pre-made master wound around the plate cylinder 7 is a mode in which other people cannot see.

  Specifically, after writing the security mode program to the RAM 86, the CPU 85 sends a command to the plate cylinder drive motor 12, and the dog 25 is set to the security mode position sensor 27 for the plate cylinder 7 stopped at the home position. Rotate until detected (by distance L in FIG. 2). Thereafter, when the user presses the print start key 71 or the trial printing key 72, a print activation signal or a trial printing activation signal from the trial printing key 72 is sent from the operation panel 69 to the CPU 85, but the CPU 85 does not accept this. The stencil printing apparatus 1 does not perform the printing operation and the trial printing operation because it recognizes that the confidentiality mode program is written in the RAM 86 and does not output a command to the main drive circuit. In addition, when the print start key 71 or the trial printing key 72 is pressed and the signal is input, the CPU 85 sends a signal to the operation panel 69 and displays a “printing impossible” message on the LCD display unit of the screen operation unit 77. Display.

  This confidentiality mode state is continued until the plate making start key 70 is pressed. When the plate making start key 70 is pressed, the CPU 85 deletes the confidentiality mode program written in the RAM 86 and sends a command to the plate making drive circuit and the plate making drive circuit to the stencil printing apparatus 1 following the plate making operation. The operation is executed to place the stencil printing apparatus 1 in a print standby state.

  As described above, in the conventional security mode, in addition to prohibiting the printing operation and the test printing operation, the notch portion and the flange portion 18b of the flange portion 17b are formed by rotating the plate cylinder 7 from the home position. Since the position of the plate cylinder 7 is different from that of the stencil printing apparatus 1 and the detachment of the plate cylinder 7 from the housing is prohibited, the plate cylinder 7 is removed from the stencil printing apparatus 1 and printing is performed by another similar stencil printing apparatus. By doing so, it is possible to prevent a situation in which confidentiality is leaked and a situation in which confidentiality is leaked by peeling the master that has been made from the plate cylinder 7 and decoding the master itself.

  In addition to the above-described conventional security mode, it is more preferable to add the configuration and operation of the security mode proposed by the present applicant in Patent Document 2 above. That is, the description of the stencil printing apparatus 1 in FIG. 1 is omitted, but a lock mechanism is provided on the front side of the stencil printing apparatus 1 when the unitized plate cylinder 7 is detached from the casing as the apparatus main body. It is desirable that each lock mechanism be controlled so that the front door cover that can be opened and closed and the discharge box 55 provided with the lock mechanism are not detached from the casing. As disclosed in the publication, each locked state is maintained even after the main power is turned off to disable all states in which the master made on the plate cylinder can be seen. If there is a unitized plotter (plate making plate feeding section), the same applies to the prohibition / locking of the plotter.

On the other hand, in step S2 of FIG. 8 and FIG. 9, when the security mode setting person touches the yes key 90a to display it in black and white reversed display, the process proceeds to step S4 and the screen operation unit 77 shown in FIG. The screen changes to an LCD display screen on which “1. Name, 2. Affiliation, 3. Telephone number, 4. Setting period” can be entered.
At this time, when the person who sets the confidentiality mode touches the touch key portion of “1. Name” displayed on the screen operation unit 77 in FIG. 10, the screen operation unit 77 shown in FIG. Characters such as 50 hiragana characters can be input using the touch panel of the screen operation unit 77 and the LCD. The same applies to the input of “2. Affiliation”.
Next, when the touch key portion of “3. telephone number” is touched, the screen operation unit 77 shown in FIG. 12 is automatically switched, so that characters such as alphanumeric characters can be used using the touch panel and LCD of the screen operation unit 77.・ Numerical input is possible. The same applies to the input of “4. Setting period”.
As a result, information related to the security mode setting person of “1. Name”, “2. Affiliation”, and “3. Telephone number” as security related information, “4. Setting period” security mode setting time, security mode When information / data such as the releasable time is input, this data is stored / saved in the backup RAM 88 (step S5).

Next, the process proceeds to step S6 and the screen operation unit 77 shown in FIG. 13 is automatically switched to, and a selection screen of “Do you want to make a plate outside the plate-making area?” “Yes” or “No” is selected. Changes to. Here, when the person who sets the confidentiality mode touches the yes key 90a, the process proceeds to step S9, and the “outside plate making area plate making mode” is automatically set.
This “non-plate-making area plate-making mode” is different from the conventional confidentiality mode in that only the information plate-making portions 34c and 34d at the front end portion or the rear end portion as the non-plate making area 34b shown in FIG. This mode allows plate making according to the confidential information entered in S4, and permits printing of only the part corresponding to the information plate making section 34c or 34d, and is input / set during "4. set period". If the confidentiality mode setting time and the confidentiality mode cancelable time have not elapsed, not only the plate making but also the mode (state) in which printing cannot be performed.

  That is, in the conventional confidentiality mode, the CPU 85 validates and accepts the plate removal operation start signal and the plate making operation start signal from the plate making start key 70. However, the “non-plate making area plate making mode” unique to this embodiment is used. When set, the CPU 85 invalidates and accepts the respective activation signals from the plate making start key 70 based on the respective activation signals from the print start key 71 or the trial printing key 72, and “4. setting period”. The mode state is maintained until the input / set confidentiality mode setting time and the confidentiality mode cancelable time elapse.

The plate making operation corresponding to the image data requiring confidentiality is performed in the normal plate making area 34a as described above, and at this time, based on the security mode setting person information stored in the backup RAM 88, the non-plate making area 34b. Is made by the information plate making unit 34c (or 34d).
That is, in the plate making to the information plate making unit 34c of the master 34, the plate making start timing in the thermal head 37 is advanced as compared with the case of plate making in the normal plate making area 34a, and the number of pulses applied to the master transport motor 35 is set to The CPU 85 appropriately controls in accordance with the plate making start timing. The plate making to the information plate making portion 34d of the master 34 may be performed by making the plate making drive time in the thermal head 37 longer than in the case of making the plate in the normal plate making area 34a.

Next, the process proceeds to step S10, and the “plate making prohibition mode” is automatically set. At this time, the message “Currently, the security mode is not allowed to make a plate” is displayed on the LCD display unit of the screen operation unit 77. Therefore, if another user tries to use the stencil printing apparatus 1, the security is maintained. When the mode setter understands that the confidentiality mode is being set and presses the print start key 71, information relating to the confidentiality mode setting person made by the information plate making unit 34c of the master 34 that has been made, ie, Only “1. Name”, “2. Affiliation”, “3. Telephone number”, and “4. Setting period” are printed.
At this time, the CPU 85 sets only the information plate-making part 34c (or information plate-making part 34d) of the non-plate-making area 34b of the master 34 in which the secret-related information is set by the security setting mode setter and the secret-related information is made. When set to printable, it functions to invalidate the input of the plate making start signal from the plate making start key 70 and not accept it. Further, the print start key 71 functions as a secret related information print setting unit for setting only the information plate making unit 34c (or 34d) of the master 34 in which the secret related information is made.

As a result, other users can check the contents of the printed material only in the information plate making unit 34c of the master 34 that has been made, and the stencil printing apparatus 1 is used after the “4. setting time” in the security mode has elapsed. Recognize that you have to do. Of course, if necessary, it can be canceled by contacting the person who sets the confidentiality mode. At this time, the CPU 85 functions to validate only the input of the plate making start signal from the plate making start key 70 when the “4. set time” set by the security mode setting person is exceeded.
The above-described state is stored in the pack-up RAM 88 even when the main power supply of the stencil printing apparatus 1 is turned off, and the time is measured by a backup timer (not shown), so that no problem occurs.

Although description will be made before and after, with reference to FIGS. 1 and 3 to 5, the press roller contact / separation mechanism 155, the printing unit 2, and the paper feed when printing only the information plate making unit 34 c of the master 34 that has been made by plate making. The operation of part 4 is supplemented.
Subsequent to the above-described specific plate-making operation and plate-feeding operation, specific sheet feeding and printing operations are performed. When the plate cylinder 7 is stopped at the home position, the stepping motor 152 in FIG. 4 is operated by the command from the CPU 85 to rotate the step cam 149 and the press roller locking means (not shown) is operated to move the cam portion 149a to the cam follower 148c. Abut. As a result, the movable arm 148 is swung around the support shaft 148a and the cam shaft 144 is moved to a position where the cam plate 143B can come into contact with the cam follower 141, and then the press roller locking means (not shown) is operated. Is released.

  Thereafter, when a stepping motor (not shown) is operated at a predetermined timing, the paper feed roller 47 and the drive roller 48a are driven to rotate, and the drive roller 65 and the suction fan 67 are driven. Then, the plate cylinder 7 is driven to rotate in the direction of arrow A in FIG. 1 at the printing speed set by the printing speed setting key 76, and one printing paper P is separated and fed from the paper feed tray 46, and the leading edge thereof. Is abutted against the nip portion of the registration roller pair 49 and temporarily stopped. After that, at a predetermined timing when the front end of the prepress image area of the information prepress portion 34c in the direction of arrow A of the preprinted master 34 of FIG. 5 wound on the plate cylinder 7 reaches a position corresponding to the press roller 9, When the registration motor 50 is operated, the registration roller pair 49 is rotationally driven, so that the temporarily stopped printing paper P is fed between the plate cylinder 7 and the press roller 9.

At the predetermined timing, the cam plate 143B moved to a position where it can come into contact with the cam follower 141 disengages its large-diameter portion from the cam follower 141, and the press roller 9 moves its peripheral surface by the biasing force of the printing spring 142. Press contact with the outer peripheral surface of the plate cylinder 7. Thus, the press roller 9, the printing paper P, and the plate making image forming portion of the information plate making portion 34c in the pre-made master 34 are brought into pressure contact with the plate cylinder 7, and the ink supplied to the inner peripheral surface of the plate cylinder 7 by the ink roller 14 is provided. Oozes out from the opening of the plate cylinder 7, passes through a mesh screen (not shown) wound around the plate cylinder 7, and the plate-making image punching portion of the information plate-making portion 34 c in the plate-making master 34, and is transferred to the printing paper P. Only the plate-making image forming portion of the information plate-making portion 34c in the plate-making master 34 is printed.
Note that the sheet feeding and printing operations for only the plate-making image forming portion of the information plate-making unit 34d in the plate-making master 34 are compared with the sheet-feeding and printing operations for the information plate-making unit 34c described above. The main difference is that the registration motor 50 is operated at a predetermined timing when the leading edge of the image area reaches a position corresponding to the press roller 9, and the cam plate 143C of the press roller contact / separation mechanism 155 is selected and used. Therefore, those skilled in the art can easily understand and implement the above description, and the description thereof will be omitted.

  Although description will be made before and after, if the no key 90b is touched in "Do you want to make a plate outside the plate making area?" Displayed on step S6 in FIG. 8 and the LCD selection screen of the screen operation unit 77 in FIG. 13, the process proceeds to step S7. Then, as shown in FIG. 14, the LCD selection screen of the screen operation unit 77 is automatically displayed, such as “Permits the plate making start key. Are you sure?”, “Yes”, “No”. .

Here, if the yes key 90a is touched, the process proceeds to step S11, and a conventional confidentiality mode similar to that described above is set. At this time, the plate making start key 70 and the yes key 90a function as a security mode release unit for canceling the security mode setting. Then, the CPU 85 controls the backup RAM 88 to cancel the setting of the security mode and automatically cancel the information regarding the security mode setting person based on the plate making start signal from the plate making start key 70.
If the no key 90b is touched, the process proceeds to step S8, and the same display as that shown in step S6 and FIG. When the security mode setting person touches the yes key 90a on the selection screen of “Do you want to make a plate outside the plate making area?”, “Yes (yes)”, or “No (no)” as shown in step S8 and FIG. When the process proceeds to step S9 and the no key 90b is touched, a conventional confidentiality mode similar to that described above in step S11 is set.

  As described above, according to the present embodiment, the screen operation unit 77 on the operation panel 69 can be easily used to obtain the security-related information such as the security mode setting person as well as the effects described in the column of the effect of the present invention. By not displaying on the LCD display unit, it is possible to inform only other users who really want to use the stencil printing apparatus 1, and it is possible to prevent the leakage of personal information of the security mode setting person.

The printing apparatus according to the present invention is not limited to the stencil printing apparatus of the above-described embodiment, and for example, supplies ink from the outside of the printing drum as disclosed in JP-A-7-17013 (Japanese Patent No. 2790963). The present invention can be applied mutatis mutandis to a printing apparatus having a structure that can be called an intaglio printing apparatus that supplies ink to a master on a printing drum to form a printed image on a sheet. In other words, it can be applied to any type of device that can leave a pre-printed plate or a used plate that needs to be kept confidential on the printing drum after the end of a given printing or during printing. Or it can be applied mutatis mutandis.
As described above, the present invention has been described with respect to embodiments including specific examples. However, the technical scope disclosed by the present invention is not limited to those exemplified in the above-described embodiments. Those skilled in the art can configure various embodiments, modifications, and examples in accordance with the necessity, purpose, application, and the like within the scope of the present invention. it is obvious.

1 is a schematic front sectional view of an entire stencil printing apparatus showing an embodiment of the present invention. It is a perspective view which shows the detachment prevention mechanism of the plate cylinder used for the stencil printing apparatus of FIG. FIG. 2 is a partial cross-sectional front view of a press roller contact / separation mechanism used in the stencil printing apparatus of FIG. 1. It is a side view of the principal part of the press roller contacting / separating mechanism of FIG. In the stencil printing apparatus of FIG. 1, a normal plate making area, a non-plate making area, and an information plate making unit formed in a master are developed and described. It is a figure which shows the operation panel used for the stencil printing apparatus of FIG. It is a block diagram which shows the control structure of the stencil printing apparatus of FIG. 3 is a flowchart showing a main operation flow when the confidentiality mode is set in the stencil printing apparatus of FIG. 1. It is a figure explaining the content displayed on the screen operation part of an operation panel. It is a figure explaining the content sequentially displayed on the screen operation part of an operation panel. It is a figure which shows an example of character input, such as a hiragana displayed on the screen operation part of an operation panel. It is a figure which shows an example of character input, such as alphanumeric characters displayed on the screen operation part of an operation panel. It is a figure explaining the content sequentially displayed on the screen operation part of an operation panel. It is a figure explaining the content sequentially displayed on the screen operation part of an operation panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing device 2 Printing part 3 Plate making plate feeding part 5 Plate discharging part 7 Plate cylinder 34 Master 34a Normal plate making area 34b Outside plate making area 34c, 34d Information plate making part 35 outside plate making area 35 Master conveyance motor (master conveyance drive means)
37 Thermal head (plate making means)
49 Registration roller pair (registration means)
50 Registration motor (registration drive means)
69 Operation panel (operation unit)
70 Plate making start key (plate making start means, security mode release means)
71 Print start key (print activation means, confidential related information print setting means)
77 Screen operation section 78 Confidentiality maintenance key (confidentiality preservation mode setting means)
80 control means 85 CPU
87 RAM
88 Backup RAM
155 Press roller contact / separation mechanism (printing pressure range variable means)
A Rotation direction of plate cylinder P Printing paper (sheet / printed medium)
X Master transport direction

Claims (7)

A printing unit having a plate cylinder for winding a master made on the outer peripheral surface, a plate making and supplying unit for making a master and winding the master made on the plate cylinder, and on an outer peripheral surface of the plate cylinder A plate discharging unit that peels off and discards a used master, a printing start unit that generates a printing start signal for starting the printing operation by the printing unit, and a plate discharging start signal for starting the plate discharging operation by the plate discharging unit. And a plate making starting means for generating a plate making start signal for starting the plate making and feeding operation by causing the plate making and supplying unit to perform printing by operating the printing unit based on the print starting signal, and Based on the start signal and the plate making start signal, after the used master is removed from the outer peripheral surface of the plate cylinder by the plate discharging unit, a new plate has been made on the outer peripheral surface of the plate cylinder by the plate making and feeding unit. Printing device to wrap the master In,
Having a confidentiality mode setting means for setting the confidentiality mode when it is not desired to know the contents of the printed matter and the master that has been made by a person other than the person who performs printing;
When the security mode is set by the security mode setting means, the security related information related to the security mode can be made in the non-plate making area of the master, and the master on which the security related information is made A printing apparatus characterized in that only the area outside the plate making area can be printed. The printing apparatus according to claim 1.
The printing apparatus according to claim 1, wherein the confidential information is information related to a security mode setting person. The printing apparatus according to claim 2, wherein
The printing apparatus according to claim 1, wherein the confidential information includes a confidentiality mode setting time and a confidentiality mode cancelable time set by the confidentiality mode setting person. The printing apparatus according to claim 2 or 3,
When the security mode setting person sets the security related information and sets only the non-plate making area part of the master where the security related information is made, the input of the plate making start signal is invalidated. A printing apparatus characterized by the above. The printing apparatus according to any one of claims 1 to 4,
A printing apparatus, comprising: a secret-related information print setting unit configured to print only the non-plate-making area part of the master on which the secret-related information is made. The printing apparatus according to claim 2, wherein
The confidentiality mode release means for canceling the setting of the confidentiality mode comprises the plate making starting means,
A printing apparatus, wherein when the setting of the security mode is canceled by the plate making start signal from the plate making starting means, the information regarding the security mode setting person is automatically canceled. The printing apparatus according to claim 3.
The confidentiality mode release means for canceling the setting of the confidentiality mode comprises the plate making starting means,
A printing apparatus, wherein only the input of the plate making activation signal from the plate making activation means is validated when the confidentiality mode setting time set by the security preservation mode setter is exceeded.

Images