JP4794295B2 - Plate removal device in stencil printing machine - Google Patents

Description

  The present invention relates to a plate discharging apparatus in a stencil printing machine, and more particularly to a plate discharging apparatus having a security maintaining function for making a used master unreadable.

  The stencil printing machine pulls out a roll-shaped master (stencil sheet), heats and punches the contents of the document with a thermal head (wrap-making), winds the master-making master around the plate cylinder, and inks the punched part of the master. By supplying and pressing the printing paper against the master, the contents of the master are transferred to the printing paper. The master that has finished printing (used master) is peeled off from the plate cylinder by the plate discharging device immediately before the next plate making is performed, and stored in a plate discharging box or the like in the printing press. When a predetermined amount of used master is stored, the master is taken out of the machine from a plate release box or the like and discarded into a trash box or the like.

  By the way, since the content of the original is punched in the master used in the stencil printing machine, the content can be read even if it has been used. Therefore, when the contents of the master require confidentiality, there is a risk that the confidentiality may be leaked to a third party who has obtained the used master. For this reason, various stencil printing presses having a function of making the contents of the master unreadable have been proposed.

  Conventional techniques for making the contents of the master unreadable are roughly divided into two techniques: a technique for physically damaging the master with sharp protrusions and the like, and a technique for heating and shrinking the master. The former technique is disclosed in, for example, Patent Document 1, and the latter technique is disclosed in Patent Documents 2 and 3.

  The stencil printing machine of Patent Document 1 includes a discharge box that stores a used master that has been peeled off from a plate cylinder, and is provided with a pair of transfer rollers that sandwich and transfer the master at the entrance of the discharge box, and at least one transfer Sharp protrusions are formed on the outer periphery of the roller. Therefore, the used master that has been peeled off from the plate cylinder is pinched by the transport roller and is damaged at the same time.

  The stencil printing machine of Patent Document 2 is provided with a pair of conveyance rollers that nipping and conveying a master at the entrance of a stencil box, and the conveyance rollers are constituted by heat rollers. When the used master is introduced into the plate release box, the master that contacts the heat roller is thermally contracted or melted.

The stencil printing machine of Patent Document 3 is provided with a heater and a blower fan in a discharge box, and shrinks or melts with hot air from the heater while introducing a used master into the discharge box with a conveyor.
JP 2005-153474 A Japanese Patent Laid-Open No. 3-227785 JP 2002-86882 A

  The techniques described in Patent Documents 1 and 2 are different depending on whether the used master is physically damaged or thermally shrunk, but in both cases, the used master is processed near the entrance of the discharge box (near the transport roller). Is going. The vicinity of the entrance of the plate release box is a portion where the jam of the master is most likely to occur in the plate release process. In particular, the leading end of the master may be curled, so that it is easy to jam when biting into the transport roller. Performing a master process (a process for making it unreadable) at such a location promotes the occurrence of a jam.

  The technique of Patent Document 3 is to shrink a used master introduced into a discharge plate box with hot air, but the heat spreads over the entire discharge plate box and causes an increase in the temperature of the entire printing press. As a result, the working environment of the operator is deteriorated (especially in summer), and there is a high possibility that the control device malfunctions as the temperature rises.

  On the other hand, the applicant of the present application has previously proposed a plate discharging device that winds and stores a used master around a winding core provided in the plate discharging device (for example, Japanese Patent Application Laid-Open No. 59-1555086). It is also necessary to maintain the confidentiality of the used master. Therefore, the present invention provides a stencil printing machine equipped with a stencil discharging device of a type that winds a used master around a winding core, and can suitably maintain confidentiality and prevent jamming. An object of the present invention is to provide a plate discharging apparatus.

  The invention according to claim 1 is a plate discharging apparatus in a stencil printing machine, in which a used master in which the contents of a document are recorded is peeled off from a plate cylinder and transported, and the master is wound around a winding core and stored. A non-readable processing means for processing the contents of the master wound around the core into an unreadable state, and the unreadable processing means processes the master wound up on the core as necessary; Further, the present invention is characterized in that it is provided so as to be movable between a processing position for processing the master and a non-processing position separated from the master.

  According to a second aspect of the present invention, in the first aspect of the invention, the unreadable processing unit is configured to start the processing of the master at a predetermined timing, and the predetermined timing is transmitted to the master. On the other hand, when the leading end portion of the master is located downstream in the master winding direction from the position where the unreadable processing means acts.

  Invention of Claim 3 is provided with the detection means which detects the front-end | tip part and rear-end part of the master currently conveyed in invention of Claim 2, before winding up the said master to a winding core, The predetermined timing is after the time when the leading end portion of the master is detected by the detecting means and wound around the core, and then the trailing end portion of the master is detected by the detecting means.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the unreadable processing means is rotatable about an axis parallel to the winding core and contacts the master to damage the master. A damage processing member, and a power transmission mechanism that transmits the rotational power of the winding core to the damage processing member so as to rotate the damage processing member.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the power transmission mechanism is capable of rotating integrally with the damage treatment member and contacting the winding core or a master wound around the winding core. An interlocking roller that rotates is provided.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the interlocking roller is disposed adjacent to an axial side portion of the damage processing member and contacts the master to press the master. It is characterized by that.

  The invention according to claim 7 is the invention according to claim 5 or 6, wherein the damage processing member is a cutter for cutting the master, and the interlocking roller has a cutting depth of the damage processing member with respect to the master. A setting tool to be set is configured.

  The invention according to claim 8 is the invention according to claim 1, wherein the non-readable processing means includes a damage processing member that contacts the master and damages the master, and the damage processing is performed on the core. A relief groove for avoiding contact with the member is formed.

  The invention according to claim 9 is the invention according to claim 1, wherein the non-readable processing means includes a damage processing member that intermittently cuts the master wound around the winding core in the winding direction. It is characterized by.

  According to a tenth aspect of the present invention, in the invention according to the first aspect, the unreadable processing means includes a damage processing member having a heat roller, and the heat roller rotates about an axis parallel to the core. It is free to contact the master and thermally damage the master.

  According to an eleventh aspect of the present invention, in the tenth aspect of the present invention, a concavo-convex pattern for making the content of the master unreadable is formed on the surface of the heat roller.

According to a twelfth aspect of the present invention, in the first aspect of the invention, the unreadable processing means contacts the master and damages the master, and the damage processing member has a processing position and a non-processing state. And a moving mechanism that movably supports the position, and the moving mechanism includes a biasing member that biases the damage processing member toward the processing position.

  According to a thirteenth aspect of the invention, in the first aspect of the invention, the rotational speed of the core is configured to be variably settable, and the core is rotated when the unreadable processing means is at the processing position. The speed is set to be slower than the rotational speed of the core when in the non-processing position.

  According to the first aspect of the present invention, the unreadable process is performed on the used master that has already been wound around the core, so that it cannot be read when the master is introduced into the discharge box or the like. There is no jam caused by processing. Further, since the non-readable process is performed on a specific master as necessary (for example, when the confidential mode is selected), the possibility of a master winding jam occurring can be reduced.

  According to the second aspect of the present invention, it is possible to prevent the occurrence of winding jam such that the leading end portion of the master is peeled off from the core due to the non-reading processing means acting on the leading end portion of the master. .

  According to the invention of claim 3, by using the detection means, it is possible to detect the start time of the processing by the unreadable processing means. In addition, the plate removal apparatus is usually provided with a sensor for detecting the start and completion of the introduction of the master (a sensor for detecting a jam at the time of introduction to the plate removal apparatus), and this sensor is also used as the detection means of the present invention. It becomes possible. In this case, since it is not necessary to provide a new detection means, cost reduction can be achieved.

  According to the invention of claim 4, since the damage processing member is rotated using the rotational power of the winding core, a motor or the like for rotating the damage processing member becomes unnecessary, and the structure is simplified and the cost is reduced. Can be planned. Moreover, the damage to the master can be promoted by rotating the damage processing member.

  According to the invention of claim 5, the power transmission mechanism can be easily configured by the interlocking roller.

  According to the sixth aspect of the invention, since the master is pressed by the interlocking roller, it can be surely damaged by the damage processing member while the master is firmly held. Moreover, since the interlocking roller as the power transmission mechanism is also used, the number of parts can be reduced and the structure can be simplified.

  According to the invention of claim 7, since the cut depth of the master is set by the interlocking roller, the core is not damaged by the cutter. Moreover, since the interlocking roller as the power transmission mechanism is also used, it is not necessary to provide a separate setting tool, and the number of parts can be reduced and the structure can be simplified.

  According to invention of Claim 8, even if it is the master of the 1st plate wound up by the core by making a cutter enter into the escape groove formed in the core, it is surely damaged without damaging the core. Can do.

  According to the ninth aspect of the present invention, the master is intermittently cut in the winding direction, so that the master is not collapsed due to the cutting, and the state wound on the core is maintained. be able to.

  According to the tenth aspect of the present invention, the master can be damaged only by bringing the heat roller into contact with the master wound around the winding core, and winding jam hardly occurs.

  According to invention of Claim 11, since the uneven | corrugated pattern is formed in the surface of the said heat roller, a master can be damaged by the convex part which contacts a master. Accordingly, it is possible to effectively make the reading impossible with the minimum necessary amount of heat.

  According to the twelfth aspect of the invention, since the damage processing member is urged toward the processing position by the urging member, for example, when the damage processing member is a cutter, the pressure for cutting into the master is urged. In the case of a heat roller, a pressure for press-contacting the master can be applied.

  According to the thirteenth aspect of the present invention, when the processing of the unreadable processing means is not performed, the winding speed of the master can be promoted by increasing the rotation speed of the core, and the processing of the unreadable processing means is performed. Sometimes, it is possible to reliably perform the processing by reducing the rotational speed of the winding core.

[Main configuration of stencil printing machine]
FIG. 1 is a front view schematically showing a stencil printing machine 10 according to an embodiment of the present invention. The stencil printing machine 10 includes an image reading device 11, a plate making device 12, a printing device 13, a paper feeding device 14, a paper discharging device 15, a plate discharging device 16, and the like provided in an apparatus main body 17. ing.

  The image reading device 11 reads an image of a document placed on a document table and generates image data. The plate making device 12 pulls out a master (stencil paper) M wound in a roll shape, and images. The image data of the document generated by the reading device 11 is recorded (plate making) on the master M by thermal punching using the thermal head 19. The printing apparatus 13 winds the master M of a single plate made around the cylindrical plate cylinder 20, supplies ink to the master M, and performs printing on the printing paper P supplied by the paper supply apparatus 14. The paper feeding device 14 takes out the printing paper P stored in a stack one by one, conveys it by the conveying roller 21, and supplies it to the lower side of the plate cylinder 20. The paper discharge device 15 peels the printed printing paper P from the plate cylinder 20 (master M), conveys it, and discharges it outside the apparatus. The plate removal device 16 peels off the master M used for printing from the plate cylinder 20 and winds it around the core 22 for storage. This plate removal operation is usually performed to remove the master M used in the previous printing from the plate cylinder 20 immediately before starting a new plate making.

  Each device is controlled in a centralized manner by control means including a CPU and a memory based on an operation input by the operator. An arrow X1 in FIG. 1 indicates the conveyance direction of the master M.

  The master M of the present embodiment includes a polyester resin film material, a polyethylene resin film material, a polyvinyl chloride resin film material, and other resin film materials, a thermoplastic resin film material, and an ink-permeable support such as Japanese paper or nonwoven fabric. Are used. However, what was comprised only from the thermoplastic resin film material can also be used.

[Configuration of plate removal equipment]
Hereinafter, the plate discharging device 16 will be described in detail.
FIG. 2 is a schematic front view of the plate discharging device 16. The plate discharging device 16 includes an introduction roller 23, a winding core 22, a supporting means 24 for the winding core 22, an unreadable processing means 25, an apparatus frame 26, and the like. The introduction rollers 23 peel off the used master M from the plate cylinder 20 (FIG. 1) and transport it to the winding core 22, and a pair of upper and lower rollers are provided on the apparatus frame 26. The used master M is sandwiched between the upper and lower introduction rollers 23 and is rotated in the direction of the arrow b, so that the used master M is conveyed to the core 22 side. The upper introduction roller 23 is provided with a scraping roller 27 having a plurality of blades radially.

  FIG. 3 is an enlarged front view showing a state in which the used master M is scraped and taken in by the introduction roller 23 from the plate cylinder 20. A clamper (clamping tool) 28 that can be opened and closed in the direction of arrow e is provided on the outer peripheral surface of the plate cylinder 20. The front end of the master M is sandwiched by the clamper 28, and the master M follows the outer peripheral surface of the plate cylinder 20. It is designed to hold them together. When starting the plate removal, the clamper 28 sandwiching the front end portion of the master M is opened as shown in the figure, and the front end portion of the master M is disposed in the vicinity of the introduction roller 23. Then, by rotating the vertical introduction roller 23 in the direction of the arrow b, the master M is scraped between the vertical introduction rollers 23 by the blades of the scraping roller 27, and the master M is sandwiched and conveyed by the vertical introduction rollers 23. It has become.

  FIG. 4 is a perspective view showing the winding core 22 and the unreadable processing means 25. The winding core 22 includes a flange 22B that protrudes in a disk shape in the radial direction near one end of a cylindrical core rod 22A. A long side of the core rod 22A is a winding part 22C that winds up the master M, and a short side is a handle 22D of the winding core 22 with the flange 22B as a boundary.

  As shown in FIG. 2, the support means 24 has a structure in which the core 22 is supported by a plurality of support belts 30 </ b> A to 30 </ b> C, and a plurality of shafts 31 </ b> A to 31 </ b> F arranged to surround the core 22 (illustrated example). 6), support pulleys 32A to 32F attached to the respective shafts 31A to 31F, and a plurality of support belts 30A to 30C wound around the pulleys 32A to 32F. Both ends of each of the shafts 31A to 31F are supported by the device frame 26.

  The apparatus frame 26 has a vertically divided shape, and the upper three shafts (first shaft 31A, second shaft 31B, and third shaft 31C) are supported by the upper frame 26A, and the lower three shafts ( The fourth shaft 31D, the fifth shaft 31E, and the sixth shaft 31F) are supported by the lower frame 26B. Further, the upper frame 26A can swing up and down with the pivot 26C as a fulcrum, and the core 22 can be opened upward by swinging upward.

  A first support belt 30A is wound around support pulleys 32A to 32C and 32F provided on the first, second, third and sixth shafts 31A to 31C and 31F. A second support belt 30B is wound around support pulleys 32D and 32E provided on the fourth and fifth shafts 31D and 31E. The third support belt 30C is wound around the support pulleys 32B, 32C, 32E, and 32F provided on the second, third, fifth, and sixth shafts 31B, 31C, 31E, and 31F.

  The first to third support belts 30 </ b> A to 30 </ b> C are configured to be extendable and contractable by a coil spring or the like, and support the winding part 22 </ b> C of the winding core 22 between the support belts 30 </ b> A to 30 </ b> C. Further, when the outer shape is increased by winding the master M around the winding core 22, for example, when the master M wound around the winding core 22 has the maximum outer diameter as shown by a one-dot chain line in FIG. Is configured to maintain the support state by extending each of the support belts 30A to 30C. The support pulleys 32A to 32F and the support belts 30A to 30C are provided in a plurality in the axial direction, and support the winding core 22 at a plurality of locations in the axial direction.

  As shown in FIG. 5, the support means 24 has a rotation drive unit 34 that rotates the core 22 to wind the master M around the core 22. FIG. 5 is an explanatory diagram showing the rotation driving unit 34. The rotation drive unit 34 includes an electric motor 35, a transmission pulley 36 provided on the output shaft of the electric motor 35, transmission pulleys 37D and 37F provided on the fourth shaft 31D and the sixth shaft 31F, and the transmission pulley 36. , 37D, 37F and a conductive belt 38 wound around. Therefore, the power from the electric motor 35 is transmitted to the fourth shaft 31D and the sixth shaft 31F via the transmission pulleys 36, 37D, 36F and the transmission belt 38, and the support pulleys 32D, 31D of FIG. Power is transmitted to the support belts 30A to 30C via 32F. When the support belts 30A to 30C rotate (feed), the core 22 supported by the support belts 30A to 30C rotates together in the arrow c direction.

  As shown in FIG. 5, the rotation driving unit 34 is configured to be able to variably set the rotation speed of the core 22. For example, the rotational speed of the electric motor 35 can be made variable, or a transmission can be provided between the electric motor 35 and the shafts 31D and 31F. Further, a conduction gear 39 is provided on the fourth shaft 31D, and the conduction gear 39 meshes with a conduction gear 40 provided on the shaft of the upper introduction roller 23. Therefore, the upper introduction roller 23 is configured such that the power of the electric motor 35 is transmitted through the transmission belt 38 and the transmission gears 39 and 40.

  6 is a schematic front view of the unreadable processing means 25, and FIG. 7 is a plan view. The unreadable processing means 25 makes the contents of the used master M wound around the core 22 unreadable, and can maintain confidentiality even if the master M is taken out from the plate discharging device 16. It is. The unreadable processing means 25 includes a damage processing member 42 that makes the reading impossible by damaging the master M wound around the core 22, and a moving mechanism 43 that moves the damage processing member 42.

  As shown in FIG. 4, the damage treatment member 42 includes a support shaft 44 disposed in parallel with the core 22, and a plurality of cutters 45 provided on the support shaft 44 at intervals in the axial direction. ing. The cutter 45 is formed in a disk shape and has a blade on the outer periphery. An interlocking roller 46 is provided between the cutters 45 and on the outer sides in the axial direction of the cutters 45 at both ends so as to be integrally rotatable. As shown in FIG. 7, the interlocking roller 46 rotates together with the core 22 by contacting the master M wound around the core 22, and transmits the rotational power to each cutter 45 via the support shaft 44. A transmission mechanism is configured.

  As shown in FIG. 6, the moving mechanism 43 moves the damage processing member 42 between the processing position X that contacts the master M wound on the core 22 side and the non-processing position Y that retreats from the master M. It is to be moved. The moving mechanism 43 supports the damage processing member 42 and swings in the front-rear direction (in a direction perpendicular to the axis of the core 22) and swings back and forth. Drive means 49 for driving. The lower end portion of the support arm 48 is supported by the shaft 51. The driving means 49 urges the rotating cam 52 rotated around the shaft 52A by a driving unit such as an electric motor (not shown), the contact piece 53 contacting the outer periphery of the rotating cam 52, and the support arm 48 toward the core 22 side. The urging member 50 is provided. The contact piece 53 is provided so as to protrude from the lower end portion of the support arm 48. The urging member 50 is formed of a tension coil spring installed between the apparatus frame 26 and the contact piece 53, and acts to pull the contact piece 53 rearward.

  When the rotary cam 52 is at the position of the solid line in the figure, the support arm 48 swings away from the core 22, and the cutter 45 is away from the master M of the core 22. Then, by rotating the rotary cam 52 to the position of the two-dot chain line, the support arm 48 swings in the direction of the arrow d by the action of the biasing member 50, and the cutter 45 contacts the master M of the core 22. Further, the cutter 45 comes into strong contact with the master M of the core 22 by the urging force of the urging member 50.

  As shown in FIG. 7, the interlocking roller 46 provided on the support shaft 44 not only transmits the rotational power of the winding core 22 to the support shaft 44 and the cutter 45 by contacting the master M, but also the shaft of the cutter 45. By holding the master M on both sides in the direction, it has a function to hold the master M firmly. The interlocking roller 46 also functions as a setting tool for setting the cutting amount of the cutter 45 with respect to the master M. In this embodiment, the cutting amount is set to such an extent that the cutter 45 can cut the master M for the second and third plates wound on the core 22.

  On the other hand, a clearance groove 54 is formed on the outer peripheral surface of the winding core 22 so as not to damage the winding core 22 even when the cutter 45 is closest to the winding core 22. The escape grooves 54 are formed on the entire circumference in positions corresponding to the respective cutters 45.

  FIG. 8 is an overall perspective view of the stencil printing machine 10, and FIG. 9 is a perspective view of the plate discharging device 16. The stencil printing machine 10 can draw out the plate discharging device 16 by opening the front door 17A. The apparatus frame 26 is held in the stencil printing machine 10 by a locking means (not shown), and an end lever 26D is provided at the end of the apparatus frame 26. By tilting the lever 26D in the direction of the arrow f, The locking means of the device frame 26 can be released and pulled out to the front.

  Further, by pulling out the plate discharging device 16 toward the front, as shown in FIG. 9, the upper frame 26 </ b> A can be swung upward and the upper portion of the core 22 can be opened. The operation of setting the core 22 in the plate removal device 16 and the operation of taking out the core 22 are performed with the upper frame 26A opened.

(Operation and effect of this embodiment)
Hereinafter, the operation of the plate discharging apparatus 16 having the above configuration will be described together with the effects thereof.
FIG. 10 is an explanatory view showing the operation of the plate discharging device 16. The used master M, which has finished printing, is conveyed by the introduction roller 23 while being peeled off from the plate cylinder 20 (FIG. 3), and taken up from below on the winding core 22 rotating in the direction of arrow c. The leading end of the master M is detected by a sensor (detection means) 55 when introduced into the plate removal apparatus 16.

  When the master M is smoothly conveyed by the introduction roller 23 and wound around the winding core 22, the rear end portion of the master M comes out of the introduction roller 23 and is detected by the sensor 55. By this detection, it is determined that the master M has been introduced without jamming. If the front end or the rear end of the master M is not detected by the sensor 55, it is determined that a jam has occurred in the master M, the apparatus is stopped, and error processing is performed.

  When the leading end of the master M is wound up to the position B shown in FIG. 10, the unreadable processing means 25 is activated. That is, the damage processing member 42 at the non-processing position Y is moved to the core 22 side and disposed at the processing position X, and the cutter 45 and the interlocking roller 46 are brought into contact with the master M. The interlocking roller 46 rotates as the winding core 22 rotates, and the cutter 45 cuts the master M while rotating in the same manner. The position B is a position on the downstream side in the master winding direction c from the operation position A of the cutter 45.

  Thus, since the master 45 is cut by rotating the cutter 45, the master M can be cut surely and smoothly. Further, since the rotational power of the cutter 45 is obtained from the winding core 22, a rotation driving means dedicated to the cutter 45 is unnecessary, and the structure can be simplified and the cost can be reduced.

  As shown in FIGS. 4 and 7, the interlocking roller 46 is arranged side by side in the axial direction of the cutter 45, so that the master M is cut while the master M is firmly held and supported by the interlocking roller 46. can do. Therefore, the master M can be smoothly cut without twisting or wrinkling with the cutting. Further, since the interlocking roller 46 sets the cutting depth of the cutter 45, the winding core 22 is not damaged. Since the escape groove 54 is formed in the winding core 22, the cutter 45 can be disposed so as to enter the escape groove 54, and the first master M taken up by the winding core 22 is Can also be suitably cut.

  Since the cutter 45 and the interlocking roller 46 are urged to the master M side by the urging member 50, the power transmission action by the interlocking roller 46, the action of pressing the master M, and the cutting action by the cutter 45 are surely performed. Can do.

  The cutting of the master M is performed after the leading end of the master M is sent to the position B where the working position A of the cutter 45 has passed. This is because if the damage processing member 42 is brought into the processing position before the tip end portion of the master M passes the operating position A, the tip end portion of the master M may come off from the core 22 due to contact with the cutter 45. is there. Therefore, when the leading end portion of the master M passes the operating position A, the unreadable process is started, so that the occurrence of winding jam can be prevented.

  Further, the unreadable process may be performed when the leading end portion of the master M passes through the operating position A of the cutter 45 and is further wound up to a position B ′ on the downstream side in the winding direction. This position B ′ is a position where the tip end portion of the master M is covered from above by a portion wound later, and the winding state becomes more stable. Therefore, the occurrence of jam can be more reliably prevented by performing the unreadable process in this stable state.

  When the winding of the master M and the unreadable process are completed, the rotation of the core 22 is stopped, and the cutter 45 of the unreadable processing means 25 moves to a non-processing position Y away from the core 22. The plate removal process ends.

  FIG. 11 shows a state in which the master M is wound up to the winding core 22 to the maximum. In this case as well, the same processing as described above is performed, but the movement distance of the damage processing member 42 of the unreadable processing means 25 is short. When the master M is wound up to the maximum, the master M is detected by the sensor 56. An operation panel 17B (FIG. 8) or the like of the apparatus main body 17 displays that the master M has been wound up to the maximum, and notifies the operator. The operator performs a discarding operation for the master M based on this notification.

  As shown in FIGS. 8 and 9, the discarding operation is performed by opening the front door 17A of the stencil printing machine 10, pulling out the apparatus frame 26, swinging the upper frame 26A upward, and moving the core 22 and the master M upward. To open. Then, the handle 22D of the winding core 22 is held and taken out from the apparatus frame 26 together with the master M, and the master M is pulled out of the winding core 22 and discarded in a trash can or the like. At this time, since the master M is in an unreadable state by the unreadable processing unit 25, it is not read by a third party, and confidentiality can be maintained. Further, since the master M is cut, it is easy to remove from the core 22, and the disposal work can be performed quickly and easily.

  The unreadable processing means 25 (damage processing member 42) is provided so as to be movable between the processing position X with respect to the master M wound around the core 22 and the non-processing position Y. Processing as described above can be performed on the master M, and processing can be performed only on a specific master M as necessary. For example, the operation panel 17B (FIG. 8) of the stencil printing machine 10 is provided with a security mode switch, and only when this switch is pressed, the master M can perform the unreadable process. In this case, it is possible to suppress as much as possible the occurrence of winding jam of the master M caused by performing the unreadable process.

  Furthermore, the rotational speed of the core 22 when the master M cannot perform reading processing can be made slower than the rotational speed of the core 22 when the reading impossible processing is not performed. In this way, the unreadable process can be performed reliably, and when the unreadable process is not performed, the plate ejection process can be advanced promptly.

[Second Embodiment]
The unreadable processing operation can also be performed as follows.
As shown in FIG. 10, the plate removal device 16 is provided with a sensor (detection means) 55 that detects jamming at the time of plate removal introduction by detecting the introduction start and introduction completion of the master M. 55 is used to control the start timing of the unreadable processing means 25.

  That is, the sensor 55 detects the leading end portion of the master M, and then the master M is wound around the core 22 from the leading end side, and when the sensor 55 detects the trailing end portion of the master M or a predetermined time has elapsed since then. Later, the unreadable processing means 25 is operated.

  When the sensor 55 detects the rear end portion of the master M, the master M is wound up to some extent by the core 22, and the front end portion passes at least the operating position A of the cutter 45, or the front end portion reaches the position B ′. It is in a state. Therefore, by operating the non-readable processing means 25 in this state, it is possible to suitably perform the processing of the master M without causing a winding jam. By using the sensor 55 originally provided as an operation sensor for the unreadable processing means 25, the number of parts and the cost can be reduced.

  Further, by using the sensor 55 for detecting the jam introduced into the plate removal apparatus 16 as an operation sensor for the unreadable processing unit 25, the unreadable processing unit 25 is not operated when the introduced jam occurs. Can do. Therefore, there is no processing error caused by operating the unreadable processing means 25 in the state where the introduction jam has occurred, and the repair operation of the introduction jam can be easily performed.

[Third Embodiment]
The cutter 45 of the damage processing member 42 is not limited to a round blade shape, and can be configured as shown in FIG. 12 or FIG. 13, for example. The cutter 45 shown in FIG. 12 is provided with a plurality of blades 45A intermittently (at intervals in the circumferential direction) on the outer peripheral portion. When this cutter 45 is used, intermittent cuts are formed in the master M wound around the core 22, and reading can be made impossible by the cuts. Similarly, the cutter 45 shown in FIG. 13 is provided with a plurality of blades 45B intermittently, whereas the blade shown in FIG. 12 is rectangular, whereas in FIG. 13, the tip is a mountain (triangle). It differs in that it has a sharp shape.

  As described in the first embodiment, when the master M is cut by the round blade-shaped cutter 45, the master M is completely cut in the circumferential direction. Therefore, the master of the next version is placed on the cut master M. If M is wound, the winding state of the cut master M may be disrupted, which may adversely affect the winding of the next version of the master M. However, in the present embodiment shown in FIGS. 12 and 13, since only intermittent cuts are formed in the master M, the master M hardly collapses. There is no adverse effect.

[Fourth Embodiment]
As a means for forming intermittent cuts in the master M, the cutter 45 having a special shape as shown in FIGS. 12 and 13 is used in the third embodiment. It can also be operated as follows.

  That is, during the unreadable process, as shown in FIG. 6, the rotary cam 52 is always rotated or repeatedly rotated, and the damage processing member 42 is reciprocally swung between the processing position X and the non-processing position Y. Accordingly, the cutter 45 can be intermittently brought into contact with the master M to form intermittent cuts. In the present embodiment, the same effects as in the third embodiment can be obtained. However, since the cutter 45 having a special shape is not necessary, it can be configured at a low cost.

[Fifth Embodiment]
FIG. 14 is a perspective view of a damage processing member 42 according to the fifth embodiment. The damage processing member 42 according to the present embodiment is a so-called heat roller 57 having a heater on the outer peripheral surface of a drum-shaped roller. The temperature of the outer peripheral surface is increased, and the contacting master M is thermally contracted or melted. ing. Further, an uneven pattern is formed on the outer peripheral surface of the heat roller 57. In the present embodiment, the convex portions 58 are formed in a lattice shape, and the concave portions 59 are formed between the convex portions 58. By forming such a concavo-convex pattern, the master M can be partially heated by the convex portions 58, and the amount of heat required can be reduced compared to the case where the whole is heated.

  Further, in this embodiment, the interlocking roller 46 as in the first embodiment is not provided, but when the heat roller 57 itself contacts the master M, the rotational power of the core 22 is transmitted and rotates. It has become.

  The heat roller 57 is divided into a plurality of parts in the axial direction of the support shaft 44. This is to avoid interference with the support belts 30 </ b> A to 30 </ b> C (FIG. 2) that supports the core 22.

[Sixth Embodiment]
FIG. 15 is a perspective view of a damage processing member 42 according to the sixth embodiment. The damage processing member 42 of the present embodiment has a large number of needles or protrusions 61 formed on the outer peripheral surface of the drum-shaped roller 60, and each needle or protrusion 61 has a sharp tip and is smaller than the master M. A hole or a recess is formed. Thus, by forming many holes or dents without cutting the master M, the contents of the master M can be made unreadable and the winding of the master M with respect to the core 22 can be prevented. .

  Further, in this embodiment, the interlocking roller 46 as in the first embodiment is not provided, but when the roller 60 itself contacts the master M, the rotational power of the core 22 is transmitted and rotates. ing.

  Note that the damage processing member 42 of the present embodiment is also divided into a plurality of parts in the axial direction in order to avoid interference with the support belts 30A to 30C (FIG. 2), as in the fifth embodiment.

[Other Embodiments]
In addition to the above embodiment, the present invention can be implemented as follows, for example.
(1) As shown in FIG. 6, the urging member 50 constituting the moving mechanism 43 of the unreadable processing means 25 is not limited to a tension coil spring, but is constituted by a torsion coil spring or other elastic member attached to the shaft 51. Can do.

(2) The moving mechanism 43 of the non-readable processing unit 25 can be configured to swing the support arm 48 by a solenoid instead of the rotating cam 52.

(3) The moving mechanism 43 of the non-readable processing means 25 swings the damage processing member 42, but moves the linear movement back and forth between the processing position X and the non-processing position Y. Also good.

(4) The power transmission mechanism that transmits the rotation of the winding core 22 to the damage processing member 42 is not limited to the interlocking roller 46, and, for example, a winding conduction mechanism that interlocks the winding core 22 and the damage processing member 42. Can be used. Further, the damage processing member 42 can be forcibly rotated by a dedicated driving device.

(5) The cutter 45 can also be fixed without rotating. Moreover, it can also be comprised so that it may be rotated with the contact with the winding core 22 (free rotation), without rotationally driving by a power transmission mechanism. In addition, the cutter 45 is not limited to a disc shape, and may be formed in a band shape (knife shape).

(6) The plate cylinder 20 is not limited to a single cylinder type, and may be a multiple cylinder type.

  The present invention can be used for a plate discharging apparatus of a stencil printing machine.

1 is a schematic front view of a stencil printing machine according to an embodiment of the present invention. It is a schematic front view of a plate removal apparatus. It is an enlarged front view which shows a mode that a used master is taken in with an introduction roller. It is a perspective view which shows a winding core and an unreadable processing means. It is a schematic front view which shows a rotation drive part. It is a schematic front view of an unreadable processing means. It is a schematic plan view of an unreadable processing means. 1 is an overall perspective view of a stencil printing machine. It is a perspective view of a plate removal apparatus. It is a front view which shows the effect | action of a plate removal apparatus. It is a front view which shows the effect | action of a plate removal apparatus. It is a front view of the damage processing member concerning a 3rd embodiment. It is a front view of the damage processing member concerning a 3rd embodiment. It is a perspective view of the damage processing member concerning a 5th embodiment. It is a perspective view of the damage processing member concerning a 6th embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Stencil printing machine 16 Plate discharging apparatus 20 Plate cylinder 22 Core 25 Unreadable processing means 42 Damage processing member 43 Moving mechanism 45 Cutter 46 Interlocking roller 50 Energizing member 54 Escape groove 55 Sensor (detection means)
57 heat roller

Claims (13)

In the plate discharging apparatus in the stencil printing machine, the used master on which the content of the document is recorded is peeled off from the plate cylinder and conveyed, and the master is wound around a core and stored.
A non-readable processing means for processing the contents of the master wound around the core into an unreadable state, and the unreadable processing means processes the master wound up on the core as necessary; In addition, the stencil discharging machine in the stencil printing machine is provided movably between a processing position for processing the master and a non-processing position separated from the master. The unreadable processing means is configured to start processing of the master at a predetermined timing,
The predetermined timing is when the leading end of the master is located downstream in the master winding direction from the position where the unreadable processing means acts on the master. The stencil discharging apparatus in the stencil printing machine according to claim 1. Before winding the master around the core, it has a detecting means for detecting the leading end and the trailing end of the master being transported,
The predetermined timing is after the time when the leading end portion of the master is detected by the detecting means and then wound around the core, and then the trailing end portion of the master is detected by the detecting means. Item 3. A plate discharging apparatus in a stencil printing machine according to Item 2.   The non-readable processing means is rotatable about an axis parallel to the core and a damage processing member that contacts the master and damages the master; and the core of the core to rotate the damage processing member The stencil discharging apparatus in a stencil printing machine according to claim 1, further comprising a power transmission mechanism that transmits rotational power to the damage treatment member.   The power transmission mechanism includes an interlocking roller that can rotate integrally with the damage processing member and rotates around the core or the master wound around the core. The stencil discharging apparatus in the stencil printing machine according to claim 4.   The said interlocking | rolling roller is arrange | positioned adjacent to the side part of the axial direction of the said damage processing member, and contacts the said master, It is comprised so that this master may be hold | suppressed. Plate removal equipment in stencil printing machines.   The said damage processing member is a cutter which cut | disconnects the said master, The said interlocking roller comprises the setting tool which sets the cutting depth of the said damage processing member with respect to a master, The Claim 5 characterized by the above-mentioned. A stencil discharging apparatus in the stencil printing machine according to claim 6.   The unreadable processing means includes a damage processing member that contacts the master and damages the master, and a relief groove that avoids contact with the damage processing member is formed in the winding core. 2. A stencil discharging apparatus in a stencil printing machine according to claim 1, wherein   The stencil discharging apparatus in a stencil printing machine according to claim 1, wherein the unreadable processing means includes a damage processing member for intermittently cutting the master wound around the winding core in the winding direction.   The non-readable processing means includes a damage processing member having a heat roller, and the heat roller is rotatable about an axis parallel to the winding core and contacts the master to thermally damage the master. 2. A stencil discharging apparatus in a stencil printing machine according to claim 1, wherein   The stencil discharging apparatus in a stencil printing machine according to claim 10, wherein a concavo-convex pattern for making the content of the master unreadable is formed on a surface of the heat roller. The non-readable processing means includes a damage processing member that contacts the master and damages the master, and a moving mechanism that supports the damage processing member movably between a processing position and a non-processing position. 2. The stencil discharging apparatus in a stencil printing machine according to claim 1, wherein the moving mechanism includes a biasing member that biases the damage processing member toward the processing position.
The rotational speed of the core is configured so that the rotational speed of the core can be variably set, and the rotational speed of the core when the unreadable processing means is in the processing position is the rotational speed of the core when the rotational speed is in the non-processing position. The stencil discharging apparatus in a stencil printing machine according to claim 1, wherein the stencil printing apparatus is set later than the stencil printing machine.

Images