JP4877961B2 - Plate removal apparatus and stencil printing apparatus - Google Patents

Description

  The present invention relates to a plate discharging apparatus for storing and discarding a used master peeled from the surface of a printing drum, and a stencil printing apparatus including the same.

  A conventional stencil printing apparatus is a method in which a film surface of a master is brought into contact with a heating element such as a thermal head and heated perforated, and then wound around the outer peripheral surface of a printing drum to supply ink from the inside of the drum and a printing pressure means such as a press roller. Thus, the printing paper is continuously pressed against the master on the outer peripheral surface of the drum, and printing is performed by discharging ink from the opening portion and the master perforation portion of the printing drum and transferring it to the printing paper. The used master whose printing has been completed is peeled off from the plate cylinder by the plate removing device. After that, the plate-making image corresponding to the next document image is made by the new master, so that the next printing is started.

  The used master peeled off from the printing drum is stored in a plate discharging box in the plate discharging apparatus. This discharge box has a cylindrical storage portion in which a master is stored and a compression plate rotates around the axis of the storage portion to store the master while compressing it. When the used master is full, the ejector box is provided with a lever that pushes it in the direction of discarding the master. When this lever is operated in the push-out direction, the pushing member connected to the lever moves in the axial direction of the reservoir. Extruded. The master is forcibly discharged as a cylindrical lump. In order to reduce the operating force of the pushing member, in Patent Document 1, a rib shape is formed on the inner surface of the storage portion, and the pushing member is made by reducing the rib height as the pushing member is moved to the discharge downstream side. It has been devised, such as increasing the gap between.

Japanese Patent Laid-Open No. 11-198512

  The compression plate is usually placed in an initial position that closes the opening for taking in the master formed in the discharge box, and when the used master peeled off from the printing drum is stored in the discharge box, the opening is opened. Rotate in the direction opposite to the compression direction so as to release, stop at the master storage start position, and wait for storage of the used master. Thereafter, when the used master is stored in the discharge box, the compression plate rotates in the compression direction and is stored in the lower part of the discharge box while compressing the master. Thereafter, the compression plate rotates in the direction opposite to the compression direction and returns to the initial position.

  When the used master is discarded, the master is discarded in a cylindrical shape by pushing out the lever connected to the pushing member in the axial direction. At this time, the used master is in contact with the inner surface of the storage portion, and the used master tends to stick to the inner surface of the storage portion and the inner surface of the pushing member due to the ink adhering to the used master.

  The ink used in the stencil printing apparatus includes an emulsion type and an ultraviolet curable type. In the case of emulsion ink, the main components are oil and water components. Therefore, even in the case of a used master stuck to the inner surface of the storage part, the thrust force in the axial discharge also works as a lubricating oil for the ink. The resistance of the operating force of the push-out member is reduced. However, in the case of UV curable ink, the oil component is not included in the ink, and the ink contains acrylic resin. In a state where the used master is in contact with the inner surface, the master sticks and resistance is large, making it difficult to push the lever with the lever. Further, when it becomes difficult to push out by the lever, it takes time to take out the master to be discarded from the stencil box, and the maintenance time of the stencil printing apparatus is extended.

  An object of the present invention is to provide a stencil printing apparatus and a stencil printing apparatus that can perform good maintenance with good workability while reducing the operating force during disposal processing when the disposal master is full.

  Therefore, the invention of claim 1 has a circumferential wall and a plate discharging box having a storage portion for storing a used master, and extends in the axial direction in the storage portion, and has a free end with respect to the wall surface of the circumferential wall. In a plate discharging apparatus comprising a compression plate whose base end is rotatably supported by a plate discharging box in a state of being close to each other, a used master having an appearance shape similar to the internal shape of the storage portion and compressed by the compression plate Has an inner box that can be accommodated, and the inner box is detachably attached to the discharge box.

  According to a second aspect of the present invention, in the plate discharging apparatus according to the first aspect, the inner box is slidable in the axial direction of the storage portion.

  According to a third aspect of the present invention, in the plate discharging apparatus according to the first or second aspect, the inner box has an arc shape whose outer appearance is substantially the same length as the longitudinal direction of the storage portion, and is substantially perpendicular to both ends in the longitudinal direction. An opening for receiving the used master peeled from the outer peripheral surface of the drum is formed in a portion having a wall surface and facing the printing drum around which the used master is wound.

  According to a fourth aspect of the present invention, there is provided the plate discharging apparatus according to the third aspect, wherein the vertical wall surface has a handle for removing the inner box from the plate discharging box.

  According to a fifth aspect of the present invention, in the plate discharging apparatus according to any one of the first to fourth aspects, when the inner box is mounted on the plate discharging box, the inner box engages with the plate discharging box side, and the mounting position of the inner box with respect to the plate discharging box. It has the positioning member which defines this.

  The invention of claim 6 is the plate discharging apparatus according to any one of claims 1 to 5, wherein the inner box engages with the plate discharging box side when the inner box is mounted on the plate discharging box, and the inner box is attached to the plate discharging box. It is characterized by having a box holding means for holding in a mounted state.

  A seventh aspect of the invention is the plate discharging apparatus according to any one of the first to sixth aspects, wherein a part of the outer appearance of the inner box is a cover that can be opened and closed. The invention of claim 8 is characterized by having cover holding means for holding the cover in a closed state.

  According to a ninth aspect of the present invention, in the plate discharging apparatus according to any one of the first to eighth aspects, the inner surface of the inner box is provided in an uneven shape.

  A tenth aspect of the present invention is a stencil printing apparatus for performing printing by a plate making master wound around the surface of a printing drum, and storing a used master discarded from the outer peripheral surface of the drum after printing in the plate discharging apparatus. As a feature of the present invention, the plate removing apparatus according to any one of claims 1 to 9 is provided.

  According to the present invention, since the inner box has an external shape similar to the internal shape of the storage section and can store the used master compressed by the compression plate, the inner box is detachably attached to the discharge box. Such an extruding member becomes unnecessary, and the master box can be discarded by pulling out the inner box from the discharge box, so that the operating force can be reduced, workability is good, and good maintenance can be performed.

  According to the present invention, the outer appearance of the inner box is an arc shape having substantially the same length as the longitudinal direction of the storage portion, has wall surfaces that are substantially perpendicular to both ends in the longitudinal direction, Since the opening that accepts the used master peeled off from the surface is formed, the parts other than the opening are covered, so the user does not touch the used master when discarding the master, and the master discarding operation does not contaminate the hands Therefore, workability is good and good maintenance can be performed.

  According to the present invention, since the handle for removing the inner box from the inner box is provided on the vertical wall surface of the inner box, it is easy to pull out the inner box from the upper box, and the workability is good and good. Good maintenance can be performed.

  According to the present invention, the inner box has a positioning member that engages with the plate discharging box side when mounted on the plate discharging box and determines the mounting position of the inner box with respect to the plate discharging box. Since it can be set easily without displacement, workability is good and good maintenance can be performed.

  According to the present invention, when the inner box is mounted on the plate discharging box, the inner box is engaged with the plate discharging box side and has the box holding means for holding the inner box in the mounted state with respect to the plate discharging box. It is possible to prevent the positional deviation between the two after being attached to the battery, the workability is good, and good maintenance can be performed.

  According to the present invention, since a part of the outer appearance of the inner box is a cover that can be opened and closed, the inner box becomes full, the inner box is pulled out of the plate removal box, and the used master is vertically dropped by its own weight. Since this cover is opened to avoid the fall range of the used master, the used master can be reliably discharged to the outside of the inner box, the workability is good, and good maintenance can be performed.

  According to the present invention, since the cover holding means for holding the cover in the closed state is provided, the cover can be held in the closed state when the inner box is attached to the plate release box. Defects and cover damage can be prevented, workability is good, and good maintenance can be performed.

  According to the present invention, since the inner surface of the inner box has an uneven shape, the contact area between the inner surface of the inner box and the used master can be reduced, and the resistance when the used master is dropped from the inner box by its own weight is reduced. In addition, the used master can be discharged to the outside of the inner box more reliably, the workability is good, and good maintenance can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an overall configuration of a digital thermal type stencil printing apparatus 1. Reference numeral 50 in FIG. 1 denotes an apparatus main body frame that forms the framework of the stencil printing apparatus 1. The part indicated by reference numeral 80 on the upper part of the apparatus main body frame 50 constitutes a document reading apparatus, the part indicated by reference numeral 90 below it is also called a plate making apparatus, and the part indicated by reference numeral 100 on the left side thereof is also called a porous plate cylinder. The printing drum portion in which the printing drum 101 is arranged, the portion shown on the left side thereof is the plate discharging device 2 having the plate discharging recovery device 3 according to the present invention, the portion indicated by reference numeral 110 below the plate making device 90 is the paper feeding device, and the printing drum 101 A portion denoted by reference numeral 120 below the reference numeral indicates a printing pressure device, and a portion denoted by reference numeral 130 at the lower left of the apparatus main body frame 50 indicates a paper discharge device.

  Next, the basic operation of the stencil printing apparatus 1 will be described while supplementarily explaining the configuration of the stencil printing apparatus 1. A document 60 having an image to be printed is placed on a document placing table (not shown) arranged at the top of the document reading device 80, and a plate making start key (not shown) on an operation panel (not shown) is pressed. Along with the pressing of the plate making start key, a plate removing process is first executed. That is, in this state, the used master 7 used in the previous printing remains attached to the outer peripheral surface of the printing drum 101 of the printing drum unit 100.

  The printing drum 101 in which the used master 7 is wound around the outer peripheral surface is clamped by the leading end portion of the master 7 (master clamper 102) when a drum driving motor (not shown) that rotates the printing drum 101 is activated. Is rotated until the plate discharge position corresponding to the peeling roller 5 is reached. When the printing drum 101 reaches the plate removal position, the driving of the drum driving motor is stopped to stop the rotation of the printing drum 101, and the master clamper 102 is opened approximately 180 degrees by the operation of an opening / closing means (not shown). Thereafter, a peeling roller drive motor (not shown) that rotates the peeling roller 5 in a clockwise direction indicated by a two-dot chain line in FIG. 1, and a platen removal part (not shown) that swings the peeling roller 5 to a peeling position indicated by a two-dot chain line in FIG. By operating the swinging means, the peeling roller 5 occupies the peeling position while rotating as indicated by a two-dot chain line, and the tip of the used master 7 is moved from the outer peripheral surface of the printing drum 101 by the peeling roller 5. You can scoop up.

  At substantially the same time as the operation of the peeling roller drive motor, a discharge plate transport roller 6 (not shown) configured to rotate the discharge plate transport roller pair 6 such as a DC motor or a stepping motor is operated. It is driven to rotate in the direction indicated by the middle arrow. The leading end portion of the master 7 scooped up from the outer peripheral surface of the printing drum 101 is sent to the discharge plate conveying roller pair 6 by the rotation of the peeling roller 5, and the discharged plate box 10 is rotated and held by the discharge plate conveying roller pair 6. It is conveyed to the inside of the. When the leading end portion of the master 7 is detected by a plate removal sensor (not shown), the operation of the peeling roller driving motor is stopped, the plate discharging portion swinging unit is operated, the peeling roller 5 is stopped, and the standby is performed. Occupy position.

  When the leading end of the master 7 is detected by the above-mentioned plate ejection sensor, the printing drum 101 also starts to rotate clockwise as indicated by an arrow A in FIG. At this time, the rotational speed of a plate transport motor (not shown) is controlled so that the rotational peripheral speed of the pair of plate transport rollers 6 exceeds the rotational peripheral speed of the printing drum 101. Then, the master 7 wound on the printing drum 101 is peeled off from the outer peripheral surface of the printing drum 101 while tension is applied between the two by the rotation of the printing drum 101 and the rotation of the discharge plate conveying roller pair 6. It is conveyed in the direction of the arrow Y1 and accommodated inside the plate removal box 10.

  When it is determined that the printing drum 101 occupies a predetermined position and all the masters 7 are peeled off from the printing drum 101 and are accommodated in the discharging plate box 10, the rotation of the discharging plate conveying roller pair 6 and the printing drum 101 is stopped. . Thereafter, the compression plate 17 is rotated by a predetermined angle to push the master 7 into the discharge box 10 and the printing drum 101 is driven to rotate again, so that the printing drum 101 reaches the plate feeding position shown in FIG. When the master clamper 102 is opened as shown by the two-dot chain line by the operation of the opening / closing means, the plate discharging process (plate discharging operation) is completed.

  In parallel with the plate removal process, the document reading device 80 reads an image of the document. That is, the document 60 placed on a document placement table (not shown) is conveyed in the directions of arrows Y2 to Y3 by the rotation of the separation roller 81, the front document conveyance roller pair 82a and 82b, and the rear document conveyance roller pair 83a and 83b. It is used for exposure reading. At this time, when there are a large number of documents 60, only the lowermost document is conveyed by the action of the separating blade 84. When reading the image of the original 60, the reflected light from the surface of the original 60 illuminated by the fluorescent lamp 86 while being transported on the contact glass 85 is reflected by the mirror 87 and passes through the lens 88, and then the CCD (photocoupler such as a charge coupled device) This is performed by being incident on an image sensor 89 formed of a conversion element. The document 60 from which the image has been read is discharged onto the document tray 80A.

  The optical information of the original 60 is photoelectrically converted by the image sensor 89, and the analog electric signal is input to an analog / digital (A / D) converter (not shown) and converted into a digital image signal. The digital image signal is subjected to image processing by an image processing unit (not shown), and the image signal thus subjected to image processing is input to a plate making control unit (not shown). The image signal input to the plate making control unit is appropriately subjected to known control processing and then transmitted to the thermal head via a thermal head driving circuit (not shown).

  In parallel with the image reading operation, plate making and plate feeding steps are performed based on digital image information (image data signal). That is, the master 7 is set at a predetermined part of the plate making apparatus 90 so that the master 7 can be fed out, pulled out from a master roll 92 formed around the core tube 92 a in a roll shape, and is transferred to the thermal head 91 by the master 7. The platen roller 94 that is pressed through the roller and the pair of tension rollers 95a and 95b are rotated downstream in the sub-scanning direction Y, which is the master conveyance direction. A plurality (large number) of minute heating elements (not shown) arranged in a line in the main scanning direction orthogonal to the sub-scanning direction Y of the thermal head 91 with respect to the master 7 thus transported are as described above. A thermoplastic resin film portion of the master 7 that selectively generates heat in accordance with a data signal sent from the plate making control unit and is in contact with the generated heating element through a protective film layer (not shown). Hot melt drilled. In this way, image information is written in the master 7 as a drilling pattern by position-selective melt drilling of the master 7 according to the image information.

  The platen roller 94 is connected to a master feed motor (not shown) via a rotation transmission member (not shown) such as a timing belt and a gear, and is rotated by the master feed motor. The master feed motor is composed of, for example, a stepping motor. The rotational driving force of the master feed motor is a pair of upper and lower reversing rollers 97a and 97b via a tension transmission pair 95a and 95b and an electromagnetic clutch (not shown) via a rotation transmission member (not shown) such as a gear. To be communicated to.

The leading end of the master 7 having image information written thereon is sent out toward the outer peripheral side of the printing drum 101 by the pair of reverse rollers 97 a and 97 b while being guided on the guide plate 96, and is advanced by the plate supply guide plate 98. The direction is changed downward and hangs down toward the master clamper 102 (indicated by a two-dot chain line) of the printing drum 101 in the plate feeding position state shown in the drawing. At this time, the used master 7 has already been removed from the printing drum 101 by the discharging process.
When the front end of the master 7 that has been made is clamped by the master clamper 102 at a fixed timing, the printing drum 101 rotates the master 7 that has been made on the outer peripheral surface while rotating in the direction A (clockwise direction). Wrap gradually. The rear end of the master 7 that has been subjected to plate making is cut into a fixed length by a cutter 93.

  When the master 7 for which one plate has been made is wound around the outer peripheral surface of the printing drum 101, the plate making and plate feeding steps are finished, and the printing step is started. First, the uppermost one of the printing sheets 62 stacked on the sheet feeding table 51 is sent in the direction of arrow Y4 toward the registration roller pair 113a and 113b by the sheet feeding roller 111 and the separation roller pair 112a and 112b. Further, it is sent to the printing pressure device 120 at a predetermined timing synchronized with the rotation of the printing drum 101 by the registration roller pair 113a, 113b. When the fed printing paper 62 comes between the printing drum 101 and the press roller 103, the press roller 103 that has been separated below the outer peripheral surface of the printing drum 101 is moved upward, whereby the printing drum 101. It is pressed by the master 7 that has been made on the outer peripheral surface. In this way, ink oozes out from the perforated part of the printing drum 101 and the perforated pattern part (not shown) of the master 7 that has been made, and the oozed ink is transferred to the surface of the printing paper 62 to form a printed image. Is done.

  At this time, on the inner peripheral side of the printing drum 101, ink is supplied from the ink supply pipe 104 to an ink reservoir 107 formed between the ink roller 105 and the doctor roller 106, and is in the same direction as the rotation direction of the printing drum 101. Ink is supplied to the inner peripheral side of the printing drum 101 by the ink roller 105 that is in contact with the inner peripheral surface while rotating in synchronization with the rotation speed of the printing drum 101. The ink supply pipe 104, the ink roller 105, and the doctor roller 106 constitute an ink supply unit that supplies ink to the master 7 that has been made on the printing drum 101.

  The printing paper 62 on which the printing image is formed in the printing pressure device 120 is peeled off from the print drum 101 by the paper discharge peeling claw 114 in the paper discharge device 130 and sucked by the suction fan 118, while the suction paper discharge inlet roller 115 and The porous conveying belt 117 stretched around the suction discharge outlet roller 116 is conveyed toward the discharge tray 52 as indicated by an arrow Y5 by the counterclockwise rotation, and is sequentially discharged and stacked on the discharge tray 52. Is done. In this way, so-called plate printing is completed. At the end of plate printing, set the number of copies with the numeric keypad (not shown) on the operation panel, and press the print start key (not shown). The process is repeated for the set number of printed sheets, and all processes of stencil printing are completed.

  Next, a specific configuration of the plate removal apparatus 2 will be described. The plate removal apparatus 2 is formed long in the depth direction of the apparatus main body frame 50 and is detachably mounted from the front surface of the apparatus main body frame 50. For this reason, the depth direction of the apparatus is the mounting direction, and the front direction is the take-out direction.

  The plate removal apparatus 2 has a circumferential wall 11, a plate ejection box 10 having a storage unit 12 for storing a used master 7, and extends in the axial direction in the storage unit 12, with respect to the wall surface of the circumferential wall 11. A compression plate 17 having a master compression surface 17a on one side and a base end 17b rotatably supported by the plate removal box 10 with the free end 17a in proximity.

  A handle 19 </ b> A for handling the plate discharging box 10 is provided outside the wall portion of the plate discharging box 10 positioned in the removing direction. The handle 19A is engaged with a stationary member of the stencil printing apparatus when the stencil printing apparatus 10 is mounted on the stencil printing apparatus, and is disengaged when the stencil printing box 10 is removed from the stencil printing apparatus. A locking mechanism is provided.

  As shown in FIG. 3, the circumferential wall 11 of the discharge box 10 has a shape along a movement locus when the free end 17 a of the compression plate 17 rotates by a predetermined angle. The lower portion 10 a of the plate removal box 10 has a planar shape that is smoothly continuous with the circumferential wall 11. An opening 10 b that communicates with the storage portion 12 and receives the used master 7 is formed in the upper portion of the plate removal box 10. A plurality of ribs 28 that are arranged radially and extend in the longitudinal direction of the plate removal box 10 are arranged in the storage portion 12. Note that an arrow F indicates a master storage direction in which the used master 7 peeled from the printing drum 101 is stored.

  The compression plate 17 extends in the longitudinal direction of the plate discharging box 10, and shaft portions 18 that are rotatably supported by the box are formed at both ends of the base end 17 b. The shaft portion 18 is supported so as to be positioned substantially at the center of the storage portion 12. The compression plate 17 is configured to be rotated about 270 degrees in the storage portion 12 from the compression plate storage position indicated by reference numeral (II) in FIG. In this embodiment, the predetermined angle is 270 degrees. As shown in FIG. 2, a coupling 180 detachably connected to a drive shaft of a drive means (not shown) provided on the stencil printing machine side is provided at one end of the shaft portion 18. The compression plate 17 rotates when the driving force is transmitted from the driving means to the coupling 180.

  The compression plate 17 occupies the initial position indicated by the symbol (I) in FIG. 3 and is moved to the compression plate storage position (II) at the time of discharging the plate, and rotates clockwise in FIG. 3 at the time of compression. It moves to the master compression storage position indicated by reference numeral (III).

  As shown in FIGS. 2 and 3, the plate discharging device 2 is characterized in that the used master 7 has an external shape similar to the internal shape of the storage portion 12 inside the storage portion 12 and is compressed by the compression plate 17. Has an inner box 15 that can be accommodated.

  The inner box 15 is formed by processing a metal plate into a metal plate, and is detachably attached to the plate removal box 10. For this reason, even when the stencil printing apparatus uses ultraviolet curable ink, the expansion and dissolution of the inner box can be prevented. The inner box 15 is slidably inserted in the axial directions C and D of the storage portion 12. In this embodiment, the compression plate 17 rotates in the inner box 15 and compresses the used master 7.

  As shown in FIG. 4, the inner box 15 has an arc shape whose appearance is substantially the same length as the longitudinal direction of the storage portion 12, and wall surfaces 15 </ b> A and 15 </ b> B that are substantially perpendicular to both ends in the longitudinal direction. . An opening 16 for receiving the used master 7 peeled from the outer peripheral surface of the drum is formed at a portion of the inner box 15 facing the printing drum 101. The opening 16 is disposed so as to communicate with the opening 10 b of the discharge box 10. On one wall surface 15 </ b> A located on the back side of the apparatus, a handle 19 </ b> B that the user has when pulling out the inner box 15 from the plate removal box 10 is formed.

  2 and 4, when the inner box 15 is mounted on the plate discharging box 10, the inner box 15 is engaged with the plate discharging box 10 side, and the mounting position of the inner box 10 with respect to the plate discharging box 10 is set. A positioning member 20 is provided. The positioning member 20 is formed by bending the upper end of the wall surface 15 </ b> A toward the mounting direction of the inner box 15 with respect to the plate removal box 10 indicated by the arrow D at the upper part of the handle 19 </ b> B provided on the wall surface 15 </ b> A. The positioning member 20 is not limited to a form in which the upper end of the wall surface 15A is bent and integrally formed. For example, the positioning member 20 is a form in which a member that engages with the discharge box 10 is attached inside the wall surface 15A. May be.

  As shown in FIG. 2, the plate discharging device 2 is engaged with the plate discharging box side when the inner box 15 is mounted on the plate discharging box 10 and holds the inner box 15 in the mounted state with respect to the plate discharging box 10. Holding means 21 is provided. The box holding means 21 includes a magnet 22 provided in the plate removal box 10 and a metal protrusion 23 provided on the wall surface 15 </ b> A of the inner box 15.

  The inner box 15 is a cover 24 that can be partially opened and closed. The cover 24 is formed on the inner box 15 on the side where the used master 7 compressed by the compression plate 17 accumulates, that is, on the master compression direction side indicated by the arrow B, and both ends on the lower end side are formed on the inner box 15. It is attached to be openable and closable by a mounting member 25. The inner box 15 has a cover holding means 26 for holding the cover 24 in a closed state in the open / close region of the cover 24. In this embodiment, the cover holding means 26 is configured such that a magnet 27 is fixed to a flange portion 15B1 facing a closed cover 24 formed by bending a part of the wall surface 15B inside the inner box 15. As shown in FIGS. 3 and 4, the upper portion 24 a of the cover 24, when the cover 24 occupies the closed position, the compression plate 17 comes into contact with the compression plate storage position (II) and the compression plate storage position (II ) Functions as a stopper that regulates the counterclockwise movement.

  With the above configuration, when the operator starts the plate making operation of the next original on the stencil printing machine side, the compression plate 17 at the initial position (I) rotates counterclockwise, and the compression plate storage position (II) stops. To do. Then, the used master 7 peeled off from the outer peripheral surface of the drum is conveyed onto the compression plate 17 in the discharge box 10, and all or a part of the master is disposed on the compression plate 17. When the transport of the used master 7 is completed, the compression plate 17 starts to rotate in the master compression direction B so as to lift the used master 7 with the used master 7 placed thereon, and rotates about 270 degrees clockwise to the master compression storage position. Occupies (III). The used master 7 that has been lifted is stored along the inner surface of the inner box 15 into a cavity at the bottom of the box.

  After the compression, the compression plate 17 rotates counterclockwise and returns to the initial position (I), and this operation is repeated every time the next used master 7 is conveyed. As the used master to be stored increases, the hollow portion in the inner box 15 decreases and the compression angle of the compression plate 17 decreases. The rotation angle of the compression plate 17 is detected by control means (not shown) on the stencil printing apparatus 1 side. As a detection method, the movement of the support shaft 18 or the compression plate 17 that supports the compression plate 17 may be detected by a sensor, or when a stepping motor is used as the driving means for driving the coupling 18, the number of steps is detected. From the above, the rotation angle may be detected.

  In the stencil printing apparatus 1, the full state of the used master in the inner box 15 is determined from the rotation angle of the compression plate 17, and when it is determined that the master is full, a warning guidance is given to the operator by a display device (not shown).

  When the warning is displayed, the operator opens the front cover of the stencil printing apparatus (not shown) of the stencil printing box 10, unlocks the handle 19 </ b> A, and pulls out the stencil printing box 10 from the stencil printing machine 1. At that time, since there is a handle 19B provided on the inner box 15 on the side opposite to the handle 19A, the discharge box 10 can be held with both hands from the middle of the drawing, and the drawing work can be facilitated.

  Then, the handle 19B of the inner box 15 is grasped and pulled out from the opposite side of the handle 19A of the discharge box 10 from the inner box 15 in which a large amount of used master is compressed from the discharge box. The operator directs the opening 16 of the inner box 15 downward (rotates 180 degrees from the set position) on a trash box (not shown), and drops the used master 7 by its own weight. At this time, the cover 24 that also functions as a stopper at the time of the compression operation by the weight of the master rotates in the opening direction as shown in FIG. 5, and the inside of the inner box 15 is opened to avoid from within the range where the master falls by its own weight. Is done. Thus, the user can discard the master without getting his hands dirty.

  When the inner box 15 is returned to the original position by 180 degrees after the end of the discarding, the cover 24 rotates in the closing direction. When the inner box 15 comes into contact with the compression plate 17 as shown in FIG. It is fixed with. The user inserts the emptied inner box 15 into the discharge box 10 along the shape and while abutting the positioning member 20 against the discharge box 10. Then, since the projection 23 is attracted by the magnet 22, the plate removal box 10 and the inner box 15 are fixed. In this state, the plate discharging box 10 is set in the plate discharging device section in the stencil printing apparatus 1.

  In this way, the inner box 15 in which the used master 7 compressed by the compression plate 17 can be accommodated has an external appearance similar to the internal shape of the storage section 12 and is detachably attached to the discharge box 10. As a result, the conventional extrusion member is not necessary, and the used master 7 can be discarded by pulling out the inner box 15 from the discharge plate box 10, so that the operating force can be reduced, workability is good, and good. Maintenance can be performed.

  The outer appearance of the inner box 15 is an arc shape having substantially the same length as the longitudinal direction of the storage portion 12, has wall surfaces 15 </ b> A and 15 </ b> B substantially perpendicular to both ends in the longitudinal direction, and a drum outer periphery at a portion facing the printing drum 101. Since the opening 16 for receiving the used master 7 peeled off from the surface is formed, the parts other than the opening are covered, so that the user does not touch the used master 7 at the time of discarding the master and does not get his hands dirty. Since the master discarding operation can be performed, workability is good and good maintenance can be performed.

  Since one wall surface 15A is provided with a handle 19B for pulling out from the inner box 15 from the discharge box 10, it is easy to pull out the inner box 15 from the discharge box 10, the workability is good, and good maintenance is performed. Good maintenance can be performed.

  Since the inner box 15 is provided with the positioning member 20 that engages with the plate discharging box side when the inner box 15 is mounted on the plate discharging box 10, the inner box 15 can be easily set with respect to the plate discharging box 10 without being displaced. Good workability and good maintenance.

  In this embodiment, when the inner box 15 is mounted on the plate discharging box 10, the box holding means 21 that engages with the plate discharging box side and holds the inner box 15 in the mounted state with respect to the plate discharging box 10 is provided. Further, it is possible to prevent the positional deviation between the inner box 15 and the post-mounting box 10 after the inner box 15 is mounted, the workability is good, and good maintenance can be performed.

  Since a part of the outer appearance of the inner box 15 is a cover 24 that can be opened and closed, the inside of the inner box 15 becomes full, the inner box 15 is pulled out from the discharge box 10 and the used master 7 falls vertically under its own weight. When this is done, the cover 24 is opened to avoid the fall range of the used master 7, so that the used master 7 can be surely discarded outside the inner box, the workability is good, and good maintenance can be performed.

  In this embodiment, since the cover holding means 26 for holding the cover 24 in the closed state is provided, the cover can be held in the closed state when the inner box 15 is attached to the plate release box 10. Mounting failure and breakage of the cover 24 can be prevented, workability is good, and good maintenance can be performed.

  If the inner surface 15C of the inner box 15 is flat, it is assumed that the used master 7 collected in the box sticks to the inner surface 15C due to the viscosity of the ink. For this reason, if the inner surface 15C has an uneven shape, the contact area between the inner surface 15C and the used master 7 can be reduced, and resistance when dropping the used master 7 from the inner box 15 is reduced more reliably. The used master 7 can be discharged to the outside of the inner box 15, the workability is good, and good maintenance can be performed.

  When the inner box 15 is made of metal, the inner surface 15C may be processed to be uneven, but the processing cost is increased. It is preferable to affix to the inner surface 15C. Further, the material of the inner box 15 is not limited to metal, and may be resin. However, in consideration of using an ultraviolet curable ink, it is preferable to mold with a resin that is hardly soluble, such as POM resin or polycarbonate resin. In addition, when the inner surface 15C of the resin inner box 15 is formed in a concavo-convex shape, the concavo-convex processed sheet member may be attached as described above. May be.

It is a schematic block diagram of the stencil printing machine provided with the plate discharging apparatus which shows one Embodiment of this invention. It is a perspective view which shows the external appearance of a plate discharging apparatus. It is sectional drawing of FIG. 2A-A. It is a perspective view which shows the structure of an inner case. It is a perspective view which shows the open state of the cover provided in the inner case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stencil printing apparatus 2 Plate discharge apparatus 7 Used master 10 Discharge box 11 Circumferential wall 12 Storage part 15 Inner box 15A, 15B Vertical wall surface 15C Inner box inner surface 16 Opening part 17 Compression plate 17a Free end 17b Base end 19B Handle 20 Positioning Member 21 Box holding means 24 Cover 26 Cover holding means 101 Printing drum

Claims (10)

A plate discharging box having a circumferential wall and having a storage section for storing a used master, and a base end extending in an axial direction in the storage section and having a free end close to a wall surface of the circumferential wall. In the plate discharging apparatus comprising a compression plate rotatably supported by the plate discharging box,
It has an outer shape similar to the internal shape of the storage part, and has an inner box that can store a used master compressed by the compression plate, and the inner box is detachably attached to the discharge box. A plate removing device characterized by comprising:   The plate discharging apparatus according to claim 1, wherein the inner box is slidable in an axial direction of the storage portion.   The inner box has an arc shape whose outer appearance is substantially the same length as the longitudinal direction of the storage section, has wall surfaces that are substantially perpendicular to both ends in the longitudinal direction, and faces the printing drum around which the used master is wound. 3. The plate discharging apparatus according to claim 1, wherein an opening for receiving a used master peeled from the outer peripheral surface of the drum is formed at a portion to be used.   The plate discharging apparatus according to claim 3, further comprising a handle for pulling out the inner box from the plate discharging box on the vertical wall surface.   The said inner box has a positioning member which engages with the said plate release box side when mounted in the said plate release box, and determines the mounting position of the said inner box with respect to the plate discharge box. The plate discharging apparatus according to any one of the above.   The inner box includes a box holding unit that engages with the plate discharging box side when mounted on the plate discharging box and holds the inner box in a mounted state with respect to the plate discharging box. The plate discharging apparatus according to any one of 1 to 5.   7. The plate discharging apparatus according to claim 1, wherein a part of the outer appearance of the inner box is a cover that can be opened and closed.   The plate discharging apparatus according to claim 7, further comprising cover holding means for holding the cover in a closed state.   The plate discharging apparatus according to any one of claims 1 to 8, wherein an inner surface of the inner box has an uneven shape.   A stencil printing apparatus for performing printing with a plate making master wound around the surface of a printing drum and storing the used master peeled off from the outer peripheral surface of the drum after printing in the plate discharging apparatus, wherein the plate discharging apparatus is claimed in claims 1 to 2. A stencil printing apparatus according to claim 9, wherein the stencil printing apparatus is a stencil printing apparatus.

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