JP4469166B2 - Stencil printing machine - Google Patents

Description

  The present invention relates to a stencil printing apparatus that performs printing by winding a stencil sheet (hereinafter referred to as “master”) made on the basis of image information around an outer peripheral surface of a printing drum. The present invention relates to a stencil printing apparatus having a function of preventing others from reproducing printed contents when included.

Conventionally, a master that has been heated and punched is wound around the outer peripheral surface of a rotatable printing drum (plate cylinder), ink is supplied by an ink supply means provided inside the printing drum, and recording is performed by a pressing means such as a press roller. 2. Description of the Related Art There is known a thermal digital stencil printing apparatus that performs printing by continuously pressing a printing paper as a medium against a printing drum and causing ink to ooze out from a printing drum opening and a master perforation.
Usually, after the printing is finished, the master that has been used is left on the printing drum until the next plate making. This is because when the master is peeled off and left untouched, the ink on the printing drum touches the air and the composition changes to lower the image quality.
For this reason, since the master used in the previous printing is still wound around the outer peripheral surface of the printing drum, the same printed matter can be obtained if another person performs additional printing while using the printing drum. .

Such a current situation becomes a very important problem in the case of a confidential printed matter. As the confidential printed matter, there is, for example, a document relating to a test problem at a school or a grade.
Thus, several proposals have been made for maintaining confidentiality in the stencil printing apparatus. This will be described below.
In Japanese Patent Laid-Open No. 59-198185, when the security mode is set, the master on which the image information of the confidential original is made is released from the printing drum after printing is finished, and then the new unfinished master is printed on the printing drum. The method of winding and leaving it in is described.
In Japanese Patent Laid-Open No. 2001-213039, when the security mode is set, the master is peeled off from the printing drum after a predetermined time has elapsed after printing, and then a new unfinished master is wound around the printing drum. The method of leaving is described.
In Japanese Patent No. 2716964, when the confidentiality mode is set, additional printing cannot be performed after the printing is completed, and the operation can be started only when another original is set and the plate making start key is used. Other than this, a method is described in which additional printing is not possible even if the power switch is turned off.

Japanese Laid-Open Patent Publication No. 2002-86882 discloses a method in which when a confidentiality mode is set, a master on which image information of a confidential document has been subjected to plate making is peeled and discharged, and then heated so that a plate-making image cannot be read. Are listed.
Japanese Patent Application Laid-Open No. 2002-79735 discloses a method in which a master plate discharged by a comb-shaped discharge plate conveying roll having sharp teeth and a plate discharge compression member having sharp edges is damaged and cannot be read. Is described.
Similar to this, there is a method in which the master that has been discharged at the time of discharging is finely cut or dissolved with a solvent.

JP 59-198185 A JP 2001-213039 A Japanese Patent No. 2716964 JP 2002-86882 A JP 2002-79735 A

In each of the conventional methods described above, the method of winding an unfinished master has a problem that the consumption cost of the master increases because the master is wasted for one plate.
The method described in Japanese Patent No. 2716964 has a problem that even if additional printing cannot be performed, an image can be easily reproduced by taking out the drum unit and pressing the paper against its outer peripheral surface.
In any of these cases, the used master peeled and accommodated in the plate removal device is taken out and spread to allow an image to be seen as a reverse image (mirror image), but the used master taken out is sandwiched between sheets. However, there is a problem that if the pressure is applied, the image can be reproduced to some extent by the residual ink even though the density is low.

The method of providing the heating unit in the plate discharging unit has a problem in terms of safety as well as cost increase.
In the method of providing a sharp rotating body or rocking body in the plate discharging unit, there is a problem in terms of safety, and there is a concern that the used master is easily wound or entangled and lowers the plate discharging transportability.
In the method of providing a shredder-like cutting mechanism, the structure is complicated and expensive, and in the method of dissolving with a solvent, there is a problem that work is troublesome and attention is required in handling.

  Therefore, the main object of the present invention is to provide a stencil printing apparatus that can reliably prevent another person from reproducing an image by a used master when the confidentiality mode is set.

When printing is performed in the confidential mode, the operator cannot be relieved that the master used for printing is not disposed of on the spot without fail. Even if the confidentiality mode is set and the process is automatically performed, it is up to the machine, and the operator himself is not really convinced. It is desirable that the operator himself can confirm the disposal reliably. The present invention was created based on this idea.
Specifically, in the first aspect of the invention, printing is performed by winding a stencil sheet made on the basis of image information around the outer peripheral surface of a printing drum, and the used stencil sheet is printed on the printing drum by a plate discharging device. In the stencil printing apparatus provided so that printing cannot be executed when the stencil sheet is not wound on the printing drum, the security mode setting means for setting the security mode and the security mode are set. When set, it has a control means for controlling the stencil sheet used on the printing drum to be peeled and discharged automatically and maintained as it is immediately after the designated number of printings are finished. It is characterized by.

  According to a second aspect of the present invention, in the stencil printing apparatus according to the first aspect, when the security mode is set after the designated number of prints are completed, the control means automatically sets the printing drum immediately after the setting. The above-mentioned used stencil sheet is controlled to be peeled and discharged to maintain the state as it is.

  According to a third aspect of the invention, in the stencil printing apparatus according to the first or second aspect, before the used stencil sheet on the printing drum is automatically peeled and discharged, additional printing with the stencil sheet cannot be performed. It has the warning means which performs the warning of.

  According to a fourth aspect of the present invention, in the stencil printing apparatus according to any one of the first to third aspects, the control means executes a step of discharging the used stencil sheet subject to the security mode. After that, control is performed so that the next operation cannot be performed unless the used stencil sheet accommodated in the plate discharging apparatus is discarded.

  According to a fifth aspect of the present invention, in the stencil printing apparatus according to the fourth aspect, the discarding process is urged by a display indicating that the amount of discharged plate in the plate discharging apparatus is full.

  According to a sixth aspect of the present invention, in the stencil printing apparatus according to any one of the first to third aspects, the stencil printing apparatus has a detachable stencil storage member that stores the stencil sheet that has been discharged. And a discharge plate storage member detecting means for detecting the presence or absence of the discharge plate storage member, and when the security mode is set, the control means peels and discharges the used stencil sheet on the printing drum. Urging the take-out plate storage member to be taken out before performing the above-mentioned operation, and carrying out the peeling plate release after the removal of the plate-release storage member is confirmed by the detection information from the plate-release storage member detecting means. To do.

  According to a seventh aspect of the present invention, in the stencil printing apparatus according to the sixth aspect, the stencil printing apparatus has a configuration in which the stencil paper is compressed before the used stencil paper is stored in the stencil storage member. It is characterized by that.

  In the invention described in claim 8, in the stencil printing apparatus described in claim 6 or 7, after the plate removal storage member is taken out, the confidential base paper dedicated storage member is mounted, and the used stencil is peeled and discharged on the confidential base paper dedicated storage member The stencil sheet is stored.

  According to a ninth aspect of the present invention, in the stencil printing apparatus according to the eighth aspect, the confidential base paper dedicated storage member has a lock structure that can be opened by a dedicated key.

  According to a tenth aspect of the present invention, in the stencil printing apparatus according to the eighth aspect, the confidential base paper dedicated storage member is formed of a foldable sheet-like member and is disposed of together with the used stencil base paper that has been peeled and discharged. It is characterized by that.

  According to an eleventh aspect of the present invention, in the stencil printing apparatus according to any one of the eighth to tenth aspects, a cover that opens and closes a mounting portion of the stencil storage member, and a cover that detects an open / closed state of the cover It has a detection means, and the control means judges whether or not the confidential base paper dedicated storage member is attached based on detection information from the cover detection means.

According to the first aspect of the present invention, printing is performed by winding a stencil sheet made on the basis of image information around the outer peripheral surface of a printing drum, and the used stencil sheet is separated from the printing drum by a plate discharging device. In the stencil printing apparatus provided so that printing cannot be executed when the stencil sheet is not wound on the printing drum, the security mode setting means for setting the security mode and the security mode are set. In this case, since the used stencil sheet on the printing drum is automatically peeled and discharged immediately after the designated number of printings are finished, the control means is provided to control the state as it is. Then, the operator himself can directly confirm immediately after printing that the master used for confidentiality mode printing has been reliably discharged on the spot. It is possible to leave the field. Even if the confidentiality mode is set, the machine can be left to the machine, so the conventional anxiety that it cannot be relieved whether or not the printing process is surely performed without additional printing can be eliminated.
Further, since the unprinted master is not wound, it is not wasted for one plate, and an increase in the consumption cost of the master can be suppressed.

  According to a second aspect of the present invention, in the stencil printing apparatus according to the first aspect, when the confidentiality mode is set after the designated number of prints are completed, the control means automatically performs the step immediately after the setting. Since the stencil sheet used on the printing drum is controlled to be peeled and discharged and maintained as it is, additional printing is possible even if the operator forgets to set the security mode before printing or during printing. Therefore, the flexibility in using the apparatus can be improved.

  According to the invention described in claim 3, in the stencil printing apparatus described in claim 1 or 2, before the used stencil sheet on the printing drum is automatically peeled and discharged, additional printing with the stencil sheet can be performed. Since there is a warning means to warn that it will run out, when the confidentiality mode is set, if the operator incorrectly inputs the number of prints, etc., it will automatically be removed after printing and additional printing It is possible to prevent a malfunction that cannot be performed.

  According to a fourth aspect of the present invention, in the stencil printing apparatus according to any one of the first to third aspects, the control means includes a step of discharging the used stencil sheet subject to the security mode. After the execution, it was decided that the next operation could not be performed unless the used stencil sheet contained in the stencil machine was discarded. Master disposal must be performed by the operator himself / herself, and a third party can prevent acts such as taking out a used master subject to confidentiality from a plate removal apparatus and reproducing an image.

  According to the fifth aspect of the present invention, in the stencil printing apparatus according to the fourth aspect, the discarding process is prompted by an indication that the amount of discharged plate in the plate discharging apparatus is full. Display can be done easily using existing elements.

  According to a sixth aspect of the present invention, in the stencil printing apparatus according to any one of the first to third aspects, the stencil printing apparatus includes a detachable stencil storage member for storing the stencil stencil discharged. And a discharge plate storage member detection means for detecting the presence or absence of the discharge plate storage member, and the control means is configured to detect used stencil paper on the printing drum when the security mode is set. Urging the user to take out the plate release storage member before performing the release plate release, and executing the release plate release after the removal of the plate release storage member is confirmed by the detection information from the plate release storage member detection means; Therefore, the master in the plate storage member can be left as it is, and only the master subject to confidentiality can be peeled and discharged, so the operator can keep only the one master that has been discharged as confidential. Will be able to be processed, it can be treated with confidence surely the plate discharge master of purpose on their own.

  According to a seventh aspect of the present invention, in the stencil printing apparatus according to the sixth aspect, the stencil printing apparatus has a configuration in which the stencil paper is compressed before the used stencil paper is stored in the stencil storage member. Therefore, it is possible to compress the master that is subject to confidentiality for each plate while keeping the master in the plate removal storage member as it is. It can be handled easily.

  According to an eighth aspect of the present invention, in the stencil printing apparatus according to the sixth or seventh aspect, after the discharged plate storage member is taken out, the confidential base paper dedicated storage member is mounted, and the confidential base paper dedicated storage member is peeled and discharged. Since the used stencil sheet is stored, it is possible to easily manage the confidentiality of the stencil master only by replacing the stencil storage member.

  According to the ninth aspect of the invention, in the stencil printing apparatus according to the eighth aspect, since the confidential base paper dedicated storage member has a lock configuration that can be opened with a dedicated key, Even if the confidential base paper dedicated storage member is left in the vicinity of the device with the discharged master, the third party cannot take out the internal master. Therefore, the discharged master in the confidential raw paper dedicated storage member is more reliably managed. be able to.

  According to a tenth aspect of the present invention, in the stencil printing apparatus according to the eighth aspect, the confidential base paper dedicated storage member is formed of a foldable sheet-like member, and is disposed of together with the used stencil paper that has been peeled and discharged. As a result, it is possible to easily and inexpensively dispose of only the master master for confidentiality preservation without dirtying the hands.

  According to an eleventh aspect of the present invention, in the stencil printing apparatus according to any one of the eighth to tenth aspects, a cover that opens and closes the mounting portion of the discharged plate storage member, and an open / closed state of the cover is detected. And the control means determines whether or not the confidential base paper dedicated storage member is attached based on detection information from the cover detection means. Even if it does not have a shape, it can be detected that it has been securely attached.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
First, the configuration of the stencil printing apparatus and the outline of the printing operation in this embodiment will be described with reference to FIG. A rotary stencil printing apparatus 1 includes a printing drum 2 disposed at a substantially central portion of an apparatus main body (not shown), a plate making apparatus 3 disposed on the upper right side of the printing drum 2 in the drawing, and a lower right side of the printing drum 2. Is provided in the inside of the printing drum 2, the press roller 5 as pressing means arranged almost directly below the printing drum 2, the plate discharging device 6 arranged on the left side of the printing drum 2, and the printing drum 2. The ink supply means 7 is provided.

The printing drum 2 is constituted by a cylindrical body having an ink-permeable porous structure, and has a clamper 9 that selectively locks the front end of the master 8a that has been subjected to plate making on a part of the outer peripheral surface thereof. The printing drum 2 is driven to rotate in the clockwise direction indicated by an arrow around its own central axis by an electric motor (not shown).
The ink supply unit 7 includes an ink supply roller 10, a doctor rod 11, an ink supply pipe 12 that also serves as a rotation support shaft of the printing drum 2, and the like. The ink supply means 7 supplies ink to the inner peripheral surface of the printing drum 2 according to the rotation of the printing drum 2.
On the outer peripheral surface of the printing drum 2, a master-made master 8a having a conveyance direction front end sandwiched by a clamper 9 is wound by the viscosity of the ink.
A press roller 5 is provided at a portion facing the ink supply roller 10 across the printing drum 2. The press roller 5 is selectively brought into and out of contact with the printing drum 2 by a contact / separation mechanism (not shown) so as to press the printing paper 13 against the outer peripheral surface of the printing drum 2 and perform stencil printing in cooperation with the printing drum 2. It has become.

In the paper feeding device 4, printing paper 13 is stacked and accommodated in a feed tray 14 that can be moved up and down. The printing paper 13 is separated and fed one by one from the top by a paper feeding roller 15 and a separating member (not shown). Paper. The fed printing paper 13 is guided by the guide plates 16 and 17 and sent to the registration roller pair 18.
The printing paper 13 is temporarily stopped by the registration roller pair 18 to correct the skew, and the mark between the printing drum 2 and the press roller 5 is printed at a timing when the image on the printing drum 2 matches a predetermined position in the conveyance direction of the printing paper 13. It is sent toward the pressure part.

The plate making apparatus 3 includes a master storage unit 19 for storing a continuous sheet-like master 8 wound in a roll shape, a thermal head 20 as a thermal plate making means, a platen roller 21, a cutter 22, A plate roller pair 23 and a guide plate 24 are provided. The cutter 22 is of a guillotine type composed of an upper blade 22a and a lower blade 22b. The cutter 22 may be a rotary blade type.
The plate discharging device 6 includes a swingable peeling roller 25 for peeling the used master 8b from the printing drum 2, a pair of carrying rollers 26 and 27 for carrying the used master 8b peeled by the peeling roller 25, In order to compress the used master 8b in the discharged-box 28, the plate-release box 28 for storing the used master 8b transported by the transport rollers 26 and 27, the box storing portion 29 for storing the discharged-box 28, and the used master 8b. Compression member 30 or the like. The compression member 30 is driven in the vertical direction by a drive mechanism (not shown).
The plate removal box 28 can be taken in and out in the direction of the arrow with respect to the main body (not shown). That is, it is detachable from the apparatus main body.

  FIG. 2 shows a part of the operation panel 50. The operation panel 50 is turned on when a plate making start key 51, a printing start key 52, a stop key 53, a ten key 54, a count display unit 55, a security key 56 as a security mode setting means, and a security key 56 are pressed. LED 57 for displaying, LED 58 for indicating that the discharge box 28 is full, a liquid crystal display 59 as a display means, a confirmation key 60, and the like are provided.

The printing operation of the stencil printing apparatus 1 will be described with reference to the flowchart of FIG. For example, if there is one original and it is desired to print 50 confidential pages, the original is set in a scanner unit (not shown), the number of copies “50” is input with the ten key 54, and the plate making start key 51 is pressed.
When the plate making start key 51 is pressed (S1), the plate discharging device 6 is driven by control means (not shown) (which can also serve as the main controller of the stencil printing device 1), and the used master 8b on the printing drum 2 is peeled off. The plate removal operation is executed (S2). That is, in FIG. 1, the used master 8 b is unlocked by the clamper 9, the peeling roller 25 comes close to the surface of the printing drum 2 as the printing drum 2 rotates, and the used master 8 b And is guided to the nip of the transport rollers 26 and 27.
The used master 8b is fed toward the opening of the plate removal box 28 by the transport rollers 26 and 27. When the used master 8b is sequentially peeled and transported, and all of the master 8b is transported by the transport rollers 26 and 27, the compression member 30 starts to descend and moves down the used master 8b accommodated in the discharge box 28. Compress towards and crush.

Next, plate making and plate making operations are performed. That is, the original image is optically read by the scanner unit (S3), and the plate making apparatus 3 punches and makes the master 8 according to the image information (S4).
The master 8a thus made is locked at its tip by a clamper 9, wound around the outer peripheral surface of the rotating printing drum 2, and then the rear end of a predetermined length is cut by a cutter 22. After cutting, the rear end portion of the master 8a is pulled out, and the plate-making of the master 8a to the printing drum 2 is completed (S5).
Next, as the printing drum 2 rotates, the ink supply roller 10 and the press roller 5 are operated, and one sheet of printing paper 13 is supplied between the press roller 5 and the printing drum 2 to perform plate printing. (S6).
Here, if the operator confirms one printed plate and confirms that it is OK, the confidentiality key 56 is pressed to turn on the LED 57 and then the print start key 52 is pressed. The control means checks whether or not the print start key 52 has been pressed (S7), and if it has been pressed, a predetermined 50 sheets are printed (S8).
The LED 57 can be turned on by pressing the security key 56 during printing. That is, the confidentiality mode can be set even during printing.

The control means checks whether the confidentiality mode is set (S9). When the confidentiality mode is set, the control means controls the plate discharging device 6 as soon as printing is completed, and executes a step of peeling and discharging the used master 8b used for the printing from the printing drum 2. Also good.
In this case, the operation of wrapping the unprocessed master around the printing drum 2 after discharging is not performed. That is, control is performed so as to maintain the state as it is after the stripping and discharging.
In the current stencil printing apparatus, a new master can be created in the next printing even if the master is not wound around the outer peripheral surface of the printing drum 2 unless it is unused for a very long time. This is because if it is wound, a new image can be printed without any particular problem.
When the operation for turning on the LED 57 by pressing the confidentiality key 56 is performed after the predetermined number of printings, the control means immediately uses the used immediately for the printing immediately after the confidentiality key 56 is pressed. The step of peeling and discharging the master 8b from the printing drum 2 is executed. That is, in the present embodiment, the confidentiality mode can be set before starting printing, during printing, and after printing.

Once the used master 8b is discharged, printing using the master 8b cannot be continued. Since the operator may mistakenly recognize or input the number of printed sheets, in this embodiment, the used master 8b is not discharged immediately after the completion of printing a predetermined number of sheets, but a confirmation display is once given to the operator. (S10).
In this case, the control means starts printing and prints a predetermined 50 sheets. When the printing is completed, the control unit 50 displays on the liquid crystal display unit 59 of the operation panel 50, for example, “Additional printing is not possible because the confidentiality mode is set. “Is it OK?” Is displayed. You may make it sound a sound (for example, a buzzer) simultaneously with a character display (same in the following other embodiment). Here, the control means and the liquid crystal display unit 59 constitute warning means.
If the operator is OK, the confirmation key 60 on the operation panel 50 is pressed. The control means checks whether or not the confirmation key 60 has been pressed (S11), and if it has been pressed, immediately executes a step of peeling and discharging the used master 8b used for printing from the printing drum 2 (S12). .

Even if the used master 8b to be kept confidential is peeled off and accommodated in the discharge box 28, if another person takes it out of the discharge box 28, the image can be easily read or reproduced as described above.
In the present embodiment, in order to prevent this, the operator himself can reliably discard the used master 8b to be kept confidential on the spot. Normally, when the storage capacity in the discharge box 28 is actually full, the discharged-fill-full LED 58 is turned on by detection information from the full detection sensor, and in response to this, the operator takes out the discharge box 28 and is stored. The used master 8b is discarded.
In the present embodiment, when the used master 8b subject to confidentiality is peeled and stored in the discharge box 28, the LED 58 is turned on regardless of the storage capacity of the discharge box 28 to indicate that the discharged plate is full. To prompt the operator to discard the used master 8b in the discharge box 28 (S13).

In the normal case, the LED 58 is continuously lit, but in the confidentiality mode, the LED 58 blinks to alert the operator. After displaying the warning that the replenishment is full, the control means checks whether or not the operation of attaching / detaching the reclaimed box 28 has been performed (S14).
If the operator does not perform the disposal process of the used master 8b in the discharge box 28, the blinking display of the LED 58 will not disappear. Further, the next operation cannot be performed unless the operator performs the disposal process.
In this way, it is possible to prevent the used master 8b subject to confidentiality from remaining in the plate removal box 28.
In S9, when the confidentiality mode is not set, the control means then checks whether the confidentiality key 56 has been pressed (S15). When the confidentiality key 56 is pressed, a process of peeling and discharging the used master 8b used for the printing from the printing drum 2 is immediately executed (S16).

Next, a second embodiment will be described. The configuration is the same as in the above embodiment.
When the confidentiality mode is set, in the above-described embodiment, in order to cause the operator to discard the used master 8b that is the target of confidentiality stored in the discharging box 28, the LED 58 is turned on to warn that the discharging is full. In this embodiment, the control means displays on the liquid crystal display unit 59, for example, “Please remove the plate removal box 28 temporarily because the security mode mode plate removal is performed”.
Based on this message, the operator temporarily removes the discharge box 28 before releasing the security mode release. That is, the box storage unit 29 shown in FIG. 1 is made empty. Although not shown, the apparatus main body or the box storage unit 29 is provided with a sensor for detecting the presence / absence of the set of the discharge box 28.

When the control means confirms from the information from the sensor that the discharge box 28 has been removed, the control means executes a process of peeling and discharging the used master 8b to be kept confidential from the printing drum 2. The used master 8 b is directly stored in the box storage unit 29.
In this way, the used master 8b previously stored in the plate release box 28 is left as it is, and only the used master 8b to be confidential is peeled off from the printing drum 2 and the box storage unit 29, the operator can treat only the discharged one-version used master 8b in a confidential manner.
Of course, the box housing portion 29 is provided with a safety outer cover, and a surface unevenness treatment may be performed on the inside in order to prevent the inside from being stained with ink adhering to the used master 8b.

A third embodiment will be described based on FIGS. 4 and 5. Note that the same parts as those in the above embodiment are denoted by the same reference numerals, and unless otherwise specified, description of the configuration and functions already described is omitted, and only the main part will be described (the same applies to other embodiments below).
The present embodiment is characterized in that the used master 8b is compressed before storing the used master 8b in the discharge box 28.
A pair of gear-shaped transport rollers 74 and 75 are provided on the downstream side of the transport rollers 26 and 27 in the transport direction and in the vicinity of the opening of the plate discharging box 28. The transport rollers 74 and 75 and the transport rollers 26 and 27 are provided. Between them, an upper guide plate 76 and a lower guide plate 77 are provided. Thus, a space for compressing the used master 8b is formed. The peeling roller 25, the conveying rollers 26 and 27, the conveying rollers 74 and 75, the upper guide plate 76 and the lower guide plate 77 constitute a peeling plate conveying mechanism 70 having a compression function.

When the end of the used master 8b is scooped up (peeled) by the peeling roller 25 and peeled and conveyed by the conveying rollers 26 and 27, the downstream conveying rollers 74 and 75 do not rotate. For this reason, the used master 8b is compressed in the said space.
When the compression is completed, the conveying rollers 74 and 75 start rotating, and are discharged toward the plate discharge box 28 while biting the compressed used master 8b.
A sensor 79 for detecting the presence / absence of the set of the discharge box 28 is provided on the apparatus main body side. The sensor 79 may be mechanical or optical. An exterior cover 81 that can be rotated in the vertical direction about a shaft 82 is provided at the take-out port (outside the mounting portion) of the discharge box 28, and the exterior cover 81 is disposed on the apparatus main body side facing the upper portion of the exterior cover 81. A sensor 80 for detecting whether 81 is opened or closed is provided. The sensor 80 may also be mechanical or optical. Reference numeral 81a indicates a handle.

If the operator confirms one printed plate and confirms that it is OK, the operator presses the confidentiality key 56 to turn on the LED 57 and then press the print start key 52. Thus, printing is started and predetermined 50 sheets are printed. The LED 57 can be turned on by pressing the security key 56 during printing.
Since the confidentiality mode is set, the control means displays on the liquid crystal display unit 59 of the operation panel 50, for example, “Please remove the removal box 28 temporarily because the confidentiality mode ejection is performed”.
When it is confirmed that the sensor 79 is turned off and the discharge box 28 is removed, and it is confirmed by the information from the sensor 80 that the exterior cover 81 is closed, as shown in FIG. By operating the peeling and discharging plate transport mechanism 70, the used master 8b for one plate to be kept confidential is discharged from the printing drum 2 and compressed, and then discharged onto the box storage portion 83.

When the used master 8b is compressed and discharged, the control means displays on the liquid crystal display unit 59, for example, “take out the confidentiality master and set the discharge box 28”. In accordance with this display, the operator opens the exterior cover 81 to take out the used master 8b, sets the plate removal box 28, and closes the exterior cover 81.
The control means confirms whether or not the above operation has been reliably performed based on information from the sensors 79 and 80.
By doing so, the used master 8b accommodated at the end of the plate release box 28 is left as it is, and only the used master 8b to be classified is peeled from the printing drum 2 and compressed compactly. The box can be discharged to the box storage unit 83, and the operator can treat only the discharged one-version used master 8b as confidential. Since it is compactly compressed, handling in the process becomes very easy.

A fourth embodiment will be described based on FIGS. 6 and 7.
The present embodiment is characterized in that, in addition to the normally used discharge plate box 28, a discharge plate box 84 is provided as a confidential base paper dedicated storage member.
When the confidentiality mode is set, the control means displays on the liquid crystal display unit 59 of the operation panel 50, for example, “The confidentiality mode is released, so remove the release box 28 temporarily and replace it with a confidential release box”. Is displayed.
The information from the sensor 80 confirms that the exterior cover 81 has been opened once, the information from the sensor 79 removes the plate removal box 28 (sensor 79 is off), and the confidential plate discharge box 84 is set (sensor 79 is turned on, the control means operates the peeling plate conveying mechanism 70 to remove the used master 8b for one plate to be kept confidential from the outer peripheral surface of the printing drum 2 as shown in FIG. Then, it is discharged into the newly set discharge box 84. In this case, the sensor 80 does not necessarily have to be turned on. That is, the exterior cover 81 may remain open. Further, the compression member 30 is controlled not to move up and down.

The confidential exclusive discharge box 84 has the same external dimensions as the normally used discharge box 28, but is surrounded by a side plate in a sealed state except for the opening 84 a facing the conveying rollers 74 and 75. The used master 8b that has been used cannot be taken out.
The side surface 84b on the mounting opening side is provided so as to be rotatable in the vertical direction with the shaft 84c as a fulcrum, and a locking projection 85a is provided on the upper part thereof. A lock member 85b that receives and locks the locking projection 85a is fixed to the upper surface of the box body, and the locking mechanism 85 is configured by the locking projection 85a and the locking member 85b. When the side surface 84b is closed, it is automatically locked.

As shown in FIG. 7, the lock state of the lock mechanism 85 is released by a dedicated key 87.
When the used master 8b to be kept confidential is accommodated in the plate removal box 84, the operator removes the plate removal box 84, attaches the normal use plate removal box 28, and closes the outer cover 81.
When discarding the used master 8b in the discharge box 84, the lock state is released with the key 87, and the side surface 84b is opened and taken out.
Thus, at the time of confidential printing, if the used master 8b subject to confidentiality is always accommodated in the confidential exclusive discharge box 84 after the printing is completed, it is completely confirmed that the third party confirms the used master 8b. Can be prevented. The key 87 may be managed by a full-time person, for example.

A fifth embodiment will be described with reference to FIGS.
The present embodiment is characterized in that a secret base paper dedicated storage member 86 is provided in addition to the normally used discharge plate box 28 as in the fourth embodiment. The difference from the fourth embodiment is that the confidential base paper dedicated storage member 86 is formed of a very simple and low-cost material that can be discarded together with the used master 8b.
If the security mode is set, the control means will display on the liquid crystal display 59 of the operation panel 50, for example, “The security mode will be released. "Is displayed.
The information from the sensor 80 confirms that the exterior cover 81 has been opened once, and the information from the sensor 79 confirms that the discharge box 28 has been removed (sensor 79 off). When it is confirmed that the exterior cover 81 is closed, the control means operates the peeling and discharging plate conveying mechanism 70, and as shown in FIG. 8, the used master 8b for one plate to be kept confidential is transferred to the printing drum 2. The plate is peeled and discharged from the outer peripheral surface and discharged to the newly set confidential base paper storage member 86. In this case, the compression member 30 is controlled not to move up and down.

The confidential base paper dedicated storage member 86 is formed of a single paper material (foldable sheet-like member) such as a corrugated cardboard material. When used, the confidential base paper storage member 86 is simply folded along two folding lines 86a and 86b, It is only set to 83 and the outer cover 81 is closed. Of course, it can be bent without the broken lines 86a and 86b.
As the confidential base paper dedicated storage member 86, felt and various waste materials can be used in addition to the paper material. It is desirable that there is a slight thickness that can hold the shape in the box storage portion 83, and that the dimension in the width direction is substantially the same as the dimension in the width direction of the used master 8b.
When the outer cover 81 is closed after being set in the box storage portion 83, the control means operates the peeling and discharging plate transport mechanism 70 even if the sensor 79 is off.

When the confidentiality release plate is completed, the operator takes out the confidential base paper dedicated storage member 86 and returns the normal-use release plate 28, and then closes the outer cover 81.
As shown in FIG. 9, the taken-out confidential base paper storage member 86 is compactly folded so as to wrap the used master 8b, and discarded together with the used master 8b. Of course, only the used master 8b may be discarded.
As described above, the confidential base paper dedicated storage member 86 in the present embodiment is a disposable type in mind, and a material with a low price is selected correspondingly. In other words, the confidential base paper dedicated storage member 86 only needs to have a function that allows the operator to wrap and discard the used master 8b to be kept confidential without getting his hands dirty.

1 is a schematic front view of a stencil printing apparatus according to a first embodiment of the present invention. It is a principal part top view of an operation panel. It is a flowchart which shows control operation. It is a general | schematic front view of the plate discharging apparatus in 3rd Embodiment. In 3rd Embodiment, it is a general | schematic front view of the plate removal apparatus which shows the state which removed the plate removal box and discharged | emitted the used master of confidentiality object. It is a general | schematic front view of the plate discharging apparatus which shows the state which set the plate discharging box as a confidential base paper exclusive storage member in 4th Embodiment, and discharged | emitted the used master of confidentiality object. It is a general | schematic front view which shows the lock mechanism of the printing-release box as a confidential base paper exclusive storage member in 4th Embodiment, and its cancellation | release structure. It is a general | schematic front view of the plate discharging apparatus which shows the state which set the sheet-like confidential base paper exclusive storage member in 5th Embodiment, and discharged | emitted the used master of confidentiality object. It is a general | schematic front view which shows the state which took out the sheet-like confidential base paper exclusive storage member in 5th Embodiment, and wrapped the used master.

Explanation of symbols

2 Printing drum 6 Plate discharging device 8a Master as stencil sheet made stencil 8b Master as used stencil sheet 28 Plate discharging box as discharging plate storage member 56 Security holding key as security holding mode setting means 79 As discharging plate storage member detecting means Sensor 80 sensor as cover detection means 81 exterior cover as cover 84 plate discharge box as rear confidential base paper dedicated storage member 85 lock mechanism as lock configuration 86 confidential base paper dedicated storage member 87 key

Claims (11)

The stencil sheet made based on the image information is wound around the outer peripheral surface of the printing drum for printing, and the used stencil sheet is peeled and discharged from the printing drum by a plate discharging device, and the stencil sheet is wound around the printing drum. In a stencil printing apparatus provided so that printing cannot be executed in a state where it is not mounted,
The security mode setting means for setting the security mode, and when the security mode is set, the used stencil sheet on the printing drum is automatically peeled and discharged immediately after the designated number of printings are finished, and is left as it is. A stencil printing apparatus comprising control means for controlling to maintain this state. In the stencil printing apparatus according to claim 1,
When the security mode is set after the designated number of prints are completed, the control means automatically releases the used stencil sheet on the printing drum immediately after the setting and maintains the state as it is. A stencil printing apparatus, characterized by being controlled as described above. In the stencil printing apparatus according to claim 1 or 2,
A stencil printing apparatus comprising a warning means for giving a warning that additional printing with the stencil sheet cannot be performed before the used stencil sheet on the printing drum is automatically peeled and discharged. In the stencil printing apparatus according to any one of claims 1 to 3,
The control means performs control so that the next operation cannot be performed unless the used stencil sheet accommodated in the stencil discharging apparatus is discarded after performing the process of discharging the stencil sheet used in the security mode. A stencil printing apparatus characterized by that. In the stencil printing apparatus according to claim 4,
A stencil printing apparatus characterized in that the discarding process is urged by a display indicating that the amount of discharged printing in the discharging apparatus is full. In the stencil printing apparatus according to any one of claims 1 to 3,
The plate discharging apparatus has a detachable plate storing member that stores the stencil sheet that has been discharged, and has a plate discharging member detection means that detects the presence or absence of the plate storing member, and the control means maintains confidentiality. When the mode is set, it is urged to remove the stencil storage member before performing the detachment stencil of the used stencil sheet on the printing drum. A stencil printing apparatus, which performs stripping discharge after being confirmed by detection information from a storage member detection means. In the stencil printing apparatus according to claim 6,
The stencil printing apparatus, wherein the stencil printing apparatus has a configuration in which the stencil paper is compressed before the used stencil paper is stored in the stencil storage member. The stencil printing apparatus according to claim 6 or 7,
A stencil printing apparatus, wherein after removing the stencil storage member, a dedicated stencil sheet storage member is mounted, and the used stencil sheet peeled and discharged is stored in the dedicated stencil sheet storage member. The stencil printing apparatus according to claim 8,
A stencil printing apparatus, wherein the confidential base paper dedicated storage member has a lock structure that can be opened with a dedicated key. The stencil printing apparatus according to claim 8,
The stencil printing apparatus, wherein the confidential base paper dedicated storage member is formed of a foldable sheet-like member and is disposed of together with the used stencil base paper that has been peeled and discharged. In the stencil printing apparatus according to any one of claims 8 to 10,
A cover that opens and closes the mounting portion of the waste plate storage member; and a cover detection unit that detects an open / closed state of the cover. The control unit is configured to detect the confidential base paper dedicated storage member based on detection information from the cover detection unit. A stencil printing apparatus characterized by determining whether or not it is mounted .

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