JP2006015710A - Plate ejection device and stencil printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate ejection device which can check the leakage of secrecy from a used master while preventing a unit from becoming oversized and a manufacturing cost from increasing to a maximum possible extent, and a stencil printing device equipped with the plate ejection device. <P>SOLUTION: The plate ejection device 7 comprises a plate ejecting member 44 which releases the used master 82 from a plate cylinder 9, a plate ejection box 46 which stores the released used master 82 and a heat cutting means 45, which thermally cuts the used master 82, which is installed inside the plate ejection box 46. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a security technique for a stencil printing apparatus, and more particularly to a technique for maintaining the security of a used master peeled off from a plate cylinder.

  Using a plate cylinder composed of a porous support cylinder and a master with a laminate structure in which a thermoplastic resin film and a porous support are bonded together, the master's thermoplastic resin film surface is heated with a heating element such as a thermal head. After perforating the plate, it is wound around the plate cylinder, an appropriate amount of ink is supplied to the inner peripheral surface of the plate cylinder by the ink supply means provided inside the plate cylinder, and the printing paper is pressed by a pressing member such as a press roller or an impression cylinder. 2. Description of the Related Art A digital thermal stencil printing apparatus is well known in which printing is performed by transferring ink oozed from a plate cylinder opening portion and a master perforation portion onto a printing paper by pressing the plate to the plate cylinder.

  Recently, the stencil printing apparatus is mainly a fully automatic type capable of continuously performing the plate making operation, the plate discharging operation, the plate feeding operation, the printing operation, and the like, and the improvement of the image accuracy and the reduction of the printing cost are caused. Since it has been achieved, a user who forms an image of a certain number of copies (approximately 10 copies) is used instead of a copying machine. In this fully automatic type stencil printing apparatus, a plate discharging device is provided for peeling the used master from the outer peripheral surface of the plate cylinder, and the plate discharging device removes the master from the plate removing member for peeling the master from the plate cylinder. A storage box for storing. In this plate discharging apparatus, the plate discharging member is operated before the plate making operation is started, and the used master is peeled off from the outer peripheral surface of the plate cylinder and stored in the plate discharging box.

  The used master stored in the reclaimed box is manually discarded when the reclaimed box is full. At this time, if used masters that have been printed with confidentiality such as test questions or confidential materials are mixed in the plate removal box, press the paper against the used master by hand or use this There is a problem in that confidentiality leaks when the master is manually wound around the stencil printing apparatus and then printed or the used master is read.

  Therefore, for example, Patent Document 1 discloses a technology that uses a geared member as a plate removal member for transporting a used master and makes it impossible to discriminate contents by cutting the used master to prevent leakage of confidential information. ing. Further, for example, a technique for preventing the leakage of confidential information by disposing the heat generating means in the discharge box and disabling the contents by operating the heat generating means to thermally contract the used master is disclosed in, for example, “Patent Document 2” or “ It is disclosed in “Patent Document 3”.

Japanese Patent Publication No. 5-61107 Japanese Patent No. 28828479 JP 2002-86882 A

  However, in the technique disclosed in “Patent Document 1”, a large cutting load is generated on the plate discharging member, so that it becomes difficult to cut the used master in a compressed state, and a cutting defect is likely to occur. In order to cope with this, a sturdy gear and a high-torque drive motor are required, and there is a problem that the unit becomes large and the cost increases.

  Further, in the technique disclosed in “Patent Document 2” or “Patent Document 3”, since a large amount of ink is attached to the used master that has just been peeled and discarded, the heat of the heating means is deprived by the attached ink. As a result, the heat shrinkage of the used master becomes incomplete, the contents can be discriminated, and the secret leaks. In order to solve this, a large heat generating means and a large amount of heat generation energy are required, and there is a problem that the unit is increased in size and the cost is increased.

  SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a stencil printing apparatus and a stencil printing apparatus including the stencil printing apparatus capable of preventing the leakage of used master secret while minimizing the increase in size and cost of the unit. To do.

  The invention according to claim 1 is a plate discharging apparatus having a plate discharging member for peeling a used master from a plate cylinder and a plate discharging box for storing the peeled used master, wherein the used master is disposed inside the plate discharging box. It has a thermal cutting means which cuts by heat.

  According to a second aspect of the present invention, in the plate discharging apparatus according to the first aspect, the plate discharging member further includes two pairs of rollers that peel and convey the used master, and the used master is compressed between each pair of rollers. After that, it is cut by the thermal cutting means.

  According to a third aspect of the present invention, in the plate discharging apparatus according to the first or second aspect, the thermal cutting means further includes a comb blade for placing the used master carried into the plate discharging box by the plate discharging member. And a heating wire cutter that cuts the used master by heat, and has a comb blade shape that can be meshed with the mounting table, and the heating wire cutter mounts the used master. The used master is cut by heat by passing through a mounting table.

  According to a fourth aspect of the present invention, in the plate removal apparatus according to the third aspect, the mounting table further includes a placement position for placing the used master and a discharge position for discharging the used master into the plate removal box. It is characterized by being freely displaceable.

  According to a fifth aspect of the present invention, in the plate ejecting apparatus according to the third or fourth aspect, the cutting by the hot wire cutter is performed after the plurality of used masters are placed on the placing table. Features.

  A sixth aspect of the present invention is a stencil printing apparatus having the plate discharging apparatus according to any one of the first to fifth aspects in an apparatus main body.

  According to a seventh aspect of the present invention, in the stencil printing apparatus according to the sixth aspect, the evacuation box is further detachable from the apparatus main body, and the detachment of the stencil box from the apparatus main body is performed by the thermal cutting means. It has a control means which permits only after cutting of the used master.

  The invention according to claim 8 is the stencil printing apparatus according to claim 6 or 7, further comprising full detection means for detecting that the stencil box is full by the used master, and the full detection. The full notification by means is performed after the used master is cut by the thermal cutting means.

  The invention described in claim 9 is the stencil printing apparatus according to any one of claims 6 to 8, further comprising setting means for setting a security mode, and only when the security mode is set. The used master is cut by the thermal cutting means.

  According to a tenth aspect of the present invention, in the stencil printing apparatus according to any one of the sixth to ninth aspects, a master made of a heat-shrinkable member is further used.

  According to the present invention, since the used master peeled off from the outer peripheral surface of the plate cylinder is cut by the thermal cutting means, the used master stored in the discharge plate box can no longer determine its contents. Therefore, the contents are not leaked from the used master that has been disposed of in the trash box or the like from the discharge box, and confidentiality can be maintained.

  FIG. 1 shows a stencil printing apparatus adopting an embodiment of the present invention. In FIG. 1, a stencil printing apparatus 1 includes a printing unit 2, a plate making unit 3, a paper feeding unit 4, a paper discharge unit 5, an image reading unit 6, a plate discharging unit 7 as a plate discharging device, and the like.

  The printing unit 2 disposed almost at the center of the apparatus main body 8 has a plate cylinder 9 and a press roller 10. A plate cylinder 9 having a porous support plate having an aperture portion in which a large number of apertures are formed and a non-aperture portion on its outer peripheral surface has a rotational peripheral speed corresponding to a printing speed set by a plate cylinder drive motor (not shown). Is driven to rotate. A plurality of mesh screens made of resin or metal nets are wound on the apertures of the porous support plate, and the clamper 11 sandwiches the tip of the master on the non-apertures of the porous support plate. Can be opened and closed. Inside the plate cylinder 9 is disposed ink supply means 15 that supplies ink to the inner peripheral surface of the plate cylinder 9 and includes an ink supply pipe 12 that also serves as a support shaft, an ink roller 13, a doctor roller 14, and the like. Yes.

  Below the plate cylinder 9 is disposed a press roller 10 in which both ends of the support shaft are rotatably supported by a pair of arm members 16. The press roller 10 is configured such that each arm member 16 is swung by a swinging means (not shown) so that the outer peripheral surface thereof can be brought into contact with and separated from the outer peripheral surface of the plate cylinder 9.

  A plate making unit 3 is disposed on the upper right side of the printing unit 2. The plate making unit 3 includes a master roll support member 17, a thermal head 18, a platen roller 19, a master cutting means 20, master transport roller pairs 21 and 22, and the like.

  The master roll support member 17 rotatably and detachably supports a master roll 23a obtained by winding a master 23 formed by laminating a thermoplastic resin film and a porous support in a roll shape. In the present embodiment, as the master 23, a material in which the porous support is composed of a fiber substance such as synthetic fiber such as polyester or polyvinyl alcohol which is easily melted by heat is used.

  The thermal head 18 has a large number of heating elements, and these selectively generate heat to perform perforation plate-making on the thermoplastic resin film of the master 23. The platen roller 19 that conveys the thermal head 18 while pressing the master 23 is rotated by a stepping motor 24. The master cutting means 20 having a lower blade that is a fixed blade and an upper blade that is a movable blade cuts the master 23 by moving the movable blade up and down or rotating relative to the fixed blade. A pair of master conveying rollers 21 and 22 including a driving roller and a driven roller pressed against the driving roller conveys the master 23 together with the platen roller 19 toward the printing unit 2.

  A sheet feeding unit 4 is disposed below the plate making unit 3. The paper feed unit 4 includes a paper feed tray 25, a paper feed roller 26, a separation roller pair 27, a registration roller pair 28, and the like. A paper feed tray 25 on which paper P used for printing is stacked is supported by the apparatus main body 8 so as to be movable up and down, and is lifted and lowered by a lifting means (not shown). The paper feed tray 25 is provided with a plurality of paper size detection sensors 25a for detecting the size of the stacked paper P. The paper feed roller 26 and the separation roller pair 27 are drivingly connected by a driving force transmission means (not shown) and are driven to rotate by a common motor 29. The registration roller pair 28 is drivingly connected to a plate cylinder driving means (not shown) and is driven to rotate in synchronization with the rotation of the plate cylinder 9.

A paper discharge unit 5 is disposed on the lower left side of the printing unit 2. The paper discharge unit 5 includes a peeling claw 30, a paper discharge transport unit 31, a paper discharge tray 32, and the like.
The peeling claw 30 is swingably attached to the apparatus main body 8 and selectively occupies a position where its tip end is close to the outer peripheral surface of the plate cylinder 9 and a position where it is separated by the operation of a claw swinging means (not shown). . A paper discharge conveying means 31 is disposed below the peeling claw 21. The paper discharge conveyance unit 31 includes a driving roller 33, a driven roller 34, an endless belt 35, a suction fan 36, and the like, and discharges the printed paper P peeled off from the outer peripheral surface of the plate cylinder 9 by the peeling claw 30. The paper is conveyed toward the paper tray 32. A paper discharge tray 32 is disposed on the downstream side in the paper transport direction of the paper discharge transport means 31. The paper discharge tray 32 on which the printed paper P is stacked on the upper surface has a pair of side fences 37 and one end fence 38.

  An image reading unit 6 is disposed on the upper part of the apparatus main body 8. The image reading unit 6 includes a contact glass 39 on which a document to be printed is placed, a scanning unit 40 that scans and reads a document image, an imaging lens 41 that focuses the scanned image, and an image sensor that recognizes the focused image. 42, an A / D converter (not shown) for A / D converting an image output from the image sensor, an ADF unit 43 for continuously processing a plurality of originals, and the like.

Disposed in the upper left part of the printing unit 2 is a plate discharging unit 7 which is a characteristic part of the present invention. The plate removal unit 7 includes a plate removal member 44, a thermal cutting means 45, a plate removal box 46, and the like.
The plate discharge member 44 includes a first plate discharge roller pair 47 disposed on the upstream side in the used master conveyance direction and a second plate discharge roller pair 48 disposed on the downstream side in the used master conveyance direction. The first plate discharge roller pair 47 has a drive roller 47a made of a wing roller and a driven roller 47b made of a normal rubber roller. The drive roller 47a has a plurality of wing-like projections on its peripheral surface and is supported by a moving means 75 (see FIG. 5) so as to be movable. The wing-like projections are wound on the outer peripheral surface of the plate cylinder 9. It selectively occupies a position that contacts the used master and a position that separates from the used master. The second plate discharge roller pair 48 has a driving roller 48a and a driven roller 48b made of a normal rubber roller. The drive rollers 47a and 48a are rotationally driven by separate drive means 76 and 77 (see FIG. 5), and the driven rollers 47b and 48b are driven to rotate. The operation of each driving means 76 and 77 is controlled by a control means 81 described later.

  As shown in FIG. 2, the thermal cutting means 45 is mainly composed of a mounting table 49 and a hot wire cutter 50. A comb-blade-shaped mounting table 49 on which a used master conveyed by the plate removal member 44 is mounted is formed integrally with a support shaft 49a, and a mounting table moving means 78 (FIG. 5) connected to the support shaft 49a. 1) to place the used master as shown in FIG. 1, and to discharge the used master placed downward by turning 90 degrees downward from the placement position. Selectively occupies position. The heat ray cutter 50 that cuts the used master placed on the placing table 49 by heat is formed in a comb blade shape that meshes with the placing table 49 and is formed integrally with the support shaft 50a. Heat wires 50b are respectively disposed in the portions of the heat wire cutter 50 formed in a comb blade shape, and each heat wire 50b receives electric power from the power supply means 79 (see FIG. 5) connected to the heat wire cutter 50. Fever. A cutter moving means 80 (see FIG. 5) is connected to the support shaft 50a. The heat ray cutter 50 is rotated 90 degrees downward from the standby position shown in FIG. It selectively occupies a cutting position for cutting the used master placed on the table 49. The operations of the mounting table moving means 78, the power supply means 79, and the cutter moving means 80 are controlled by the control means 81 described later.

  A plate removal box 46 is disposed below the mounting table 49. The plate removal box 46 is disposed at a position where the used master that falls when the mounting table 49 occupies the discharge position can be stored, and is detachably attached to the apparatus main body 8. In the vicinity of the plate release box 46, a mounting sensor 51 that detects whether or not the plate release box 46 is mounted on the apparatus main body 8 and a detachment prohibiting mechanism that prohibits the detachment of the plate release box 46 from the apparatus main body 8 are arranged. It is installed. The mounting sensor 51 is a proximity sensor, and outputs a signal to the control means 81 (to be described later) when the discharge box 46 is mounted on the apparatus main body 8. The separation prohibition mechanism will be described later. Further, a fullness detection sensor 52 serving as a fullness detection means for detecting that the used master is full in the discharge plate box 46 is disposed above the discharge plate box 46. The fullness detection sensor 52, which is a proximity sensor, detects this when the amount of used master in the discharge box 46 exceeds a predetermined amount, and outputs a signal to the control means 81.

  A lock pin 53 for fixing is planted in the plate removal box 46, and a separation prohibiting mechanism 54 is disposed at a position near the lock pin 53 in the mounting position of the plate release box 46 of the apparatus body 8. As shown in FIGS. 1 and 3, the lock pin 53 is formed with a groove 53 a near the tip.

  As shown in FIG. 3, the separation prohibiting mechanism 54 includes a lock plate 55 that is swingably supported by the apparatus main body 8, a support shaft 56 that forms a swing center of the lock plate 55 and is fixed to the apparatus main body 8, and an apparatus main body. 8 includes a guide pin 57 fixed to 8, a keep solenoid 58 that swings the lock plate 55, a tension spring 59, a micro switch 60 that detects the position of the lock plate 55, and the like.

  The guide pin 57 is slidably engaged with an elongated hole 55a formed at the lower end of the lock plate 55, and the rocking range of the lock plate 55 is kept constant. The keep solenoid 58 has its plunger 58a attached to the lock plate 55, and its operation is controlled by a control means 81 to be described later. One end of the tension spring 59 is attached to the lock plate 55 and the other end is attached to the apparatus main body 8. The tension spring 59 applies a rotation biasing force in the direction indicated by the arrow in FIG.

  A hole 55 b into which the lock pin 53 can be inserted is formed at a portion between the support shaft 56 and the guide pin 57 of the lock plate 55. The hole 55b is formed at a position where the lock pin 53 is inserted when the plate removing box 46 is attached to the apparatus main body 8 with the lock plate 55 from which the plunger 58a is sucked occupied. In this state, the lock plate 55 contacts the detection piece 60 a of the micro switch 60, and a signal is output from the micro switch 60 toward the control means 81. The width of the groove 53a is formed to be larger than the thickness of the lock plate 55, and the peripheral portion of the hole 55b can be engaged with the groove 53a when the plate discharging box 46 is attached to the apparatus main body 8. ing.

  With the above-described configuration, the plate removal box 46 can be attached to and detached from the apparatus main body 8 in a state where the lock plate 55 occupies the initial position. Further, when the plate discharge box 46 is mounted on the apparatus main body 8 and the mounting sensor 51 detects the plate discharge box 46, the operation of the keep solenoid 58 is allowed. From this state, the plunger 58a is protruded, and the lock plate 55 is shown in FIG. When it is swung in the direction indicated by the arrow and occupies the engagement position, the peripheral portion of the hole 55b and the groove 53a are engaged as shown in the blowing portion in FIG. It is forbidden.

  FIG. 4 shows an operation panel of the stencil printing apparatus 1. In the figure, an operation panel 61 provided on the upper front surface of the apparatus main body 8 has a plate making start key 62, a printing start key 63, a test printing key 64, a continuous key 65, a clear / stop key 66, a numeric key 67, an enter on the upper surface. In addition to known configurations such as a key 68, a program key 69, a mode clear key 70, a printing speed setting key 71, a display device 72 composed of 7-segment LEDs, a display device 73 composed of an LCD, etc., as setting means for setting a confidentiality mode The confidential mode key 74 is provided.

  FIG. 5 is a block diagram of control means of the stencil printing apparatus 1. In the figure, a control means 81 composed of a well-known microcomputer having a CPU, ROM, RAM and the like is provided in the apparatus main body 8. An operation signal from the operation panel 61, detection signals from various sensors, and the like are input to the control unit 81, and the control unit 81 outputs the printing unit 2, the plate making unit 3, the paper feeding unit 4, and the paper discharging unit 5 based on the signals. The operations of the image reading unit 6 and the plate discharging unit 7 are controlled.

Based on the above configuration, the operation of the stencil printing apparatus 1 will be described below.
The operator presses the plate making start key 62 after setting the paper P in the paper feeding unit 4 and the original in the image reading unit 6. When the plate making start key 62 is pressed, a plate cylinder drive motor (not shown) is operated to rotate the plate cylinder 9 at a low speed. When the plate cylinder 9 reaches a predetermined discharging position, the operation of the plate cylinder drive motor is stopped and the plate cylinder 9 is stopped. After the plate cylinder 9 is stopped, the driving means 76 is actuated to drive the driving roller 47a in the clockwise direction in FIG. 1, and the moving means 75 is actuated to cause the driving roller 47a to be indicated by a two-dot chain line in FIG. The end of the used master 82 that has been moved to the position and wound on the outer peripheral surface of the plate cylinder 9 is scooped up by the wing-like projections of the drive roller 47a.

  When the end of the used master 82 is scooped up by the drive roller 47a, the plate cylinder drive motor and each drive means 76, 77 are operated, and the used master 82 is nipped and conveyed by each pair of plate discharge rollers 47,48. At this time, the moving means 75 is actuated again, and the drive roller 47a is returned to the position shown by the solid line in FIG. 1 to be in the state shown in FIG.

  When the end portion of the used master 82 is sandwiched between the second plate discharging roller pair 48, the driving unit 77 is stopped and the rotation of the driving roller 48a is stopped. At this time, the operation of the drive means 76 and the plate cylinder drive motor is continued, and the used master 82 peeled off from the outer peripheral surface of the plate cylinder 9 is placed between each of the plate discharge roller pairs 47 and 48 as shown in FIG. Compressed. At the time of peeling off the used master 82 from the plate cylinder 9, electric power is supplied from the power supply means 79 to each heat wire 50b based on a command from the control means 81, and each heat wire 50b is heated up.

  When all the used masters 82 are peeled off from the outer peripheral surface of the plate cylinder 9, the driving means 77 is actuated to drive the driving roller 48a, and the used master compressed between each pair of discharging plate rollers 47, 48 is driven. 82 is discharged onto the mounting table 49 to be in the state shown in FIG. In this state, when the heating up of each heating wire 50b is completed, a command is sent from the control means 81, the cutter moving means 80 is operated, and the heating wire cutter 50 occupies the cutting position (see FIG. 9). The used master 82 on the table 49 is cut by heat.

  When the cutting by the hot wire cutter 50 is completed, a command is sent from the control means 81, the placing table moving means 78 is actuated, and the placing table 49 is moved from the placing position to the discharge position. As shown in FIG. The cut used master 82 is stored in the discharge box 46. Thereafter, the cutter moving means 80 is actuated again, and the hot wire cutter 50 is returned to the standby position. At this time, when the full master sensor 52 detects the used master 82 in the discharge box 46, this signal is sent to the control means 81, and the control means 81 that has received the signal indicates that the discharge box 46 is full on the display device 73. For this reason, the display prompts for disposal. By performing display on the display device 73 after the master-made master 82 is cut by the thermal cutting means 45, it is prevented that the used master 82 is accidentally discarded from the plate-release box 46 before being cut, and confidentiality is maintained. Can be improved.

  Since the used master 82 peeled off from the outer peripheral surface of the plate cylinder 9 is cut by the thermal cutting means 45 by the series of operations described above, the used master 82 stored in the discharge plate box 46 already has the contents. Since it is impossible to discriminate, the contents are not leaked from the used master 82 discarded from the discharge box 46 to the trash box or the like, and confidentiality can be maintained.

  In parallel with the above-described plate ejection operation, the image reading unit 6 performs a document image reading operation. The image of the document placed on the contact glass 39 is scanned by the movement of the scanning unit 40 and input to the image sensor 42 via the imaging lens 41. The input image data is sent to the plate making unit 3 via an A / D converter (not shown).

  When the plate discharging operation is completed and the plate cylinder 9 is returned to the home position again and enters the plate making standby state, the plate making operation is started in the plate making unit 3. In the plate making section 3, the platen roller 19 and each of the master transport roller pairs 21, 22 are operated, and the master 23 is pulled out from the master roll 23a. When the master 23 that has been drawn out passes through the thermal head 18, a plate-making image corresponding to the image data is punched and plate-made. When the plate-making master 23 reaches the open clamper 11, the clamper 11 is closed, and the plate-making master 23 is held on the outer peripheral surface of the plate cylinder 9. Thereafter, the plate cylinder driving motor is operated to rotate the plate cylinder 9 at a peripheral speed substantially the same as the plate making speed, and the master 23 thus made is wound around the plate cylinder 9. Then, when the master 23 is conveyed by a predetermined length, the master cutting means 20 is operated to cut the master 23, and the cut master 23 is wound up by the plate cylinder 9 to complete the winding operation.

  After the winding operation is completed, the motor 29 is operated to operate the paper feed roller 26 and the separation roller pair 27, so that one sheet P is separated and fed from the paper feed tray 25 and the plate cylinder driving motor is operated. Then, the plate cylinder 9 is driven to rotate at a low speed. The fed paper P is temporarily stopped by the registration roller pair 28 and then directed toward the contact position between the plate cylinder 9 and the press roller 10 at a timing corresponding to the plate-making image of the master 23 wound around the plate cylinder 9. Sent. When the press roller 10 swings, the paper P is pressed against the master 23 on the plate cylinder 9, and the image is transferred to the surface thereof. By this pressing, the ink supplied from the inside of the plate cylinder 9 is distributed to the porous support plate and the master 23, and so-called printing is performed. After the plate P is peeled off from the outer peripheral surface of the plate cylinder 9 by the peeling claw 30, it is transported by the paper transporting means 31 and discharged onto the paper discharge tray 32, and the printing operation is completed and the stencil printing is completed. The apparatus 1 enters a print standby state.

  When the stencil printing apparatus 1 enters a print standby state, a printing operation is performed continuously. When the printing start key 63 is pressed after various printing conditions such as the number of sheets to be printed and the printing speed are set by the operator after the printing operation is completed, a printing speed setting key that makes the plate cylinder 9 faster than at the time of printing. The sheet P is rotated at the peripheral speed set by 71 and the sheet P is continuously fed from the sheet feeding unit 4. The fed paper P is continuously printed by the printing unit 2, then sent to the paper discharge unit 5 and discharged onto the paper discharge tray 32. When the set number of prints is exhausted, the operation of each part of the stencil printing apparatus 1 is stopped after the plate cylinder 9 is returned to the home position, and the stencil printing apparatus 1 again enters the print standby state.

  In the above-described configuration, when the confidential mode key 74 is pressed by the operator before the plate making start key 62 is pressed, the stencil printing apparatus 1 is in the confidential mode. When the stencil printing apparatus 1 is in the security mode, a command is sent from the control means 81, the keep solenoid 58 is actuated, and the lock plate 55 occupies the engagement position, so that the discharge box 46 is prohibited from being detached from the apparatus body 8. Is done. Release of the confidentiality mode is performed by appropriate means such as input of a recitation code.

  In the above-described embodiment, the configuration in which the used master 82 is cut by the thermal cutting unit 45 for each plate discharging operation is shown. However, after the plurality of used masters 82 are mounted on the mounting table 49, the cutter moving unit 80. A plurality of used masters 82 may be disconnected at a time by operating the. With this configuration, power from the power supply unit 79 can be saved.

  Further, in the above embodiment, the used master 82 may be disconnected by operating the cutter moving means 80 only when the confidential mode key 74 is pressed and the confidential mode is set. As a result, the power from the power supply means 79 can be saved by cutting only the used master 82 that requires confidentiality.

  Further, in the above-described embodiment, even if the security mode is not set, the keep solenoid 58 is operated in the initial state of the stencil printing apparatus 1 and the lock plate 55 is placed in the engagement position, whereby the apparatus main body 8 of the stencil printing box 46 is removed. , And the keep solenoid 58 is actuated again after the used master 82 is cut by the thermal cutting means 45 to return the lock plate 55 to the initial position, and the detachment of the discharge box 46 from the apparatus main body 8 is allowed. It is good also as a structure. According to this configuration, confidentiality can always be maintained, and confidentiality can be improved.

1 is a schematic front view of a stencil printing apparatus to which an embodiment of the present invention is applied. It is a schematic perspective view explaining the thermal cutting means used for one Embodiment of this invention. It is a schematic perspective view explaining the detachment | leave prohibition mechanism used for one Embodiment of this invention. It is the schematic of the operation panel used for one Embodiment of this invention. It is a block diagram of the control means used for one Embodiment of this invention. It is the schematic for demonstrating operation | movement of the plate discharging part in one Embodiment of this invention. It is the schematic for demonstrating operation | movement of the plate discharging part in one Embodiment of this invention. It is the schematic for demonstrating operation | movement of the plate discharging part in one Embodiment of this invention. It is the schematic for demonstrating operation | movement of the plate discharging part in one Embodiment of this invention. It is the schematic for demonstrating operation | movement of the plate discharging part in one Embodiment of this invention.

Explanation of symbols

1 Stencil printing device 7 Plate removal device (plate removal part)
DESCRIPTION OF SYMBOLS 8 Apparatus body 9 Plate cylinder 23 Master 44 Discharge plate member 45 Thermal cutting means 46 Discharge box 47 Roller pair (1st discharge roller pair)
48 Roller pair (second discharge roller pair)
49 Mounting base 50 Heat ray cutter 52 Full detection means (full detection sensor)
74 Setting means (confidential mode key)
81 Control means 82 Used master

Claims (10)

In a plate discharging apparatus having a plate discharging member for peeling a used master from a plate cylinder and a plate discharging box for storing the peeled used master,
A plate discharging apparatus comprising a heat cutting means for cutting the used master by heat inside the plate discharging box. The plate discharging apparatus according to claim 1,
The plate discharging device has two pairs of rollers for peeling and transporting the used master, and the used master is compressed between the roller pairs and then cut by the thermal cutting means. In the plate discharging apparatus according to claim 1 or 2,
The thermal cutting means has a comb blade-shaped mounting table for mounting the used master carried into the plate discharging box by the plate discharging member, and a comb blade shape that can be meshed with the mounting table. And a hot wire cutter for cutting the used master by heat, and the hot wire cutter cuts the used master by heat by passing through the mounting table on which the used master is placed. . In the plate discharging apparatus according to claim 3,
2. The plate removing apparatus according to claim 1, wherein the placing table is freely displaceable between a placement position for placing the used master and a discharge position for discharging the used master into the discharge box. In the plate discharging apparatus according to claim 3 or 4,
2. A plate discharging apparatus, wherein a plurality of versions of the used master are mounted on the mounting table, and the cutting with the hot wire cutter is performed.   A stencil printing apparatus comprising the apparatus main body having the plate discharging apparatus according to any one of claims 1 to 5. In the stencil printing apparatus according to claim 6,
The discharge box is detachable from the apparatus main body, and has control means for allowing the release box to be detached from the apparatus main body only after the used master is cut by the thermal cutting means. Stencil printing device. In the stencil printing apparatus according to claim 6 or 7,
It has full detection means for detecting that the waste box is full by the used master, and the full notification by the full detection means is performed after the used master is cut by the thermal cutting means. A stencil printing device. In the stencil printing apparatus according to any one of claims 6 to 8,
A stencil printing apparatus comprising setting means for setting a security mode, wherein the used master is cut by the thermal cutting means only when the security mode is set. In the stencil printing apparatus according to any one of claims 6 to 9,
A stencil printing apparatus using a master made of a heat-shrinkable member.

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