JP2014162003A - Plate ejector of stencil printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate ejector of a stencil printing apparatus, which is easy to use.SOLUTION: The plate ejector 10 of a stencil printing apparatus comprises: ejected plate number count means (50d) that counts the number of ejected plates of used stencil papers G; a movable compressing member 45 for compressing the used stencil papers G stored in a plate eject box 11; compressing member position detecting means (43 and 50e) for detecting that the compressing member 45 reaches an end position when the plate eject box 11 is empty; and control means 50 that when the number of the ejected plates reaches a predetermined fulling-up number, determines that the ejected plates are full. The control means 50, when the number of ejected plates reaches the predetermined fulling-up number and the compressing member 45 reaches the end position when the box is empty, clears count of the number of ejected plates.

Description

  The present invention relates to a stencil printing machine, and a used stencil sheet removed from the outer peripheral surface of a plate cylinder is compressed by a compression member (compression claw) movable (rotatable) within a stencil box to store a large number of plates. The present invention relates to a stencil discharging apparatus for a stencil printing machine configured as described above.

  In general, a stencil printing machine is applied to a stencil printing machine that prints an ink image on a recording medium.

  In the stencil printing machine described above, a stencil sheet (master) for one plate made is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and ink supplied into the plate cylinder is formed on the stencil sheet. The ink image is printed on a recording medium (paper) through the perforated image portion, and is often used because a large number of the same ink image can be printed on one stencil sheet.

  Then, after all printing is completed in the stencil printing machine, the used stencil sheet is removed from the plate cylinder and transported to a plate discharging apparatus installed in the vicinity of the plate cylinder, and in a plate discharging box provided in the plate discharging apparatus. By compressing used stencil sheets one by one with a rotatable compression claw, a large number of compressed stencil sheets are stored in a stencil box.

  After that, when the compressed stencil sheet compressed by the compression claw in the stencil box becomes full, the user removes the stencil box from the stencil printing machine and discards many compressed stencil sheets into the trash can. doing.

  In this type of stencil printing machine, the present applicant previously removed the stencil when the stencil box was removed and reattached due to incomplete processing of the stencil box provided in the stencil printing machine. There has been proposed a stencil printing machine evacuation apparatus provided with a stencil box inside detection means capable of detecting whether or not a compressed stencil sheet exists in the box (see, for example, Patent Document 1).

  The description will be made with reference to the stencil discharging apparatus disclosed in Patent Document 1 described above. In the description of the column of the prior art described in Patent Document 1, the stencil printing machine is detached from the plate cylinder provided in the stencil printing machine. When the used stencil sheet is transported to the stencil box via the stencil transport unit, the number of stencil sheets of the used stencil sheet sent from the stencil cylinder to the stencil box is provided in the vicinity of the stencil transport unit. A stencil box that stores a number of stencil sheets that have been compressed with a compression claw when the number of stencils that have been used up in the stencil box is reached. Many stencil sheets that have already been compressed are discarded in a trash can.

  Here, when removing the stencil box containing the compressed stencil sheet and then remounting it, discard the part of the compressed stencil sheet with the adhesive ink adhered to it. A serviceman performs maintenance and inspection before re-installing the stencil box, or before the number of used stencil sheets sent from the plate cylinder to the stencil box reaches the specified full tank set value. The user has intentionally removed the evacuation box when the evacuation box has been removed and then reattached, or before the number of used stencil sheets has reached the specified full tank setting. In some cases, the pre-compressed stencil sheet is pretending to be discarded by reattaching the stencil box without discarding the compressed stencil sheet.

  In each of the above cases, since the number of stencil sheets discharged is cleared (reset) by returning the stencil box, an abnormal amount of used stencil paper will be stored in the reattached stencil box, There is a possibility that a discharge plate jam occurs or the discharge plate transfer means for transferring the used stencil sheet from the plate cylinder into the discharge plate box is damaged.

  Therefore, in the stencil machine discharging apparatus disclosed in the above-mentioned Patent Document 1, an improvement is made to prevent the number of evacuated plates from being cleared and newly counted even though the evacuated stencil box is not empty. In addition, it is configured to detect whether or not stencil paper is present in the reattached platen box by installing a detection unit inside the platen box in the vicinity of the mounted platen box. ing.

JP-A-7-137421

  According to the conventional stencil printing machine discharging apparatus disclosed in the above-mentioned Patent Document 1, by installing a discharge box inside detection means by a light reflection type sensor in the vicinity of the mounted stencil box, the detaching plate mounted again. When it is detected that the inside of the box is not empty by the discharge box inside detection means, a warning is given to the user to prompt the user to remove the discharge box again.

  Here, the operation of the above-described conventional stencil printing machine in the plate discharging apparatus will be briefly described with reference to FIG. FIG. 9 shows an operation flow in a plate discharging apparatus of a conventional stencil printing machine.

  As shown in FIG. 9, in step S51, an ink image is printed on a sheet of stencil paper wound around the outer peripheral surface of the plate cylinder.

  Next, in step S52, after all printing is completed, the used stencil sheet is removed from the plate cylinder and the stencil discharging operation is performed, while the outer stencil sheet is replaced with the next stencil sheet.

  Next, in step S53, every time the plate discharging operation is performed in step S52, the number of discharged stencil sheets used by the plate discharging counting means is counted, and the count of the number of discharged plates is a predetermined value corresponding to the storage capacity of the plate discharging box. It is inquired whether or not it is a set value, and if the number of discharged plates has not reached the predetermined full set value (NO), the process returns to step S51. On the other hand, if the count of the number of discharged plates has reached a predetermined full tank set value (in the case of YES), “full tank” is displayed on the operation panel in step S54.

  When “full tank” is displayed on the operation panel, the user performs an operation to remove the plate release box. At this time, there are three steps S55A to 55C as modes for removing the plate release box.

  That is, in the above-described aspect of step S55A, the user performs the removal / removal of the discharge plate without discarding the compressed stencil sheet stored in the discharge plate (when pretending to be discarded).

  In the above-described aspect of step S55B, the user substantially discards the compressed stencil sheet stored in the evacuation box. However, when the user spreads and remains about one plate due to stickiness of the sticky ink (substantially discards). If you are).

  At this time, the stencil sheet to be discarded is sticky due to the adhesion of ink, and tends to stick to the stencil box, and the stencil sheets to be discarded tend to stick to each other. This tendency is prominent in the mechanism for compressing and reducing the volume of the stencil sheet. Due to this sticking tendency, when the stencil sheet that has been compressed is discarded, about one plate may remain in the discharge box. The stencil sheet may be pulled by the above two sticking at the time of disposal and spread in the stencil box.

  Further, in the aspect of step S55C described above, the user has discarded all the compressed stencil sheets stored in the stencil box.

  Of the three types described above, in the case of the mode of step S55A (when pretending to be discarded) and the mode of step S55B (when substantially discarded), the compressed stencil sheet remains in the stencil box. Therefore, after remounting the plate release box, it is detected in step S56 that the stencil sheet remains in the plate release box by means of the inside of the plate release box, and the process returns to step S54 without clearing the count of the plate release number. “Full tank” is displayed again on the panel, prompting the user to remove the waste box.

  On the other hand, in the case of the mode of step S55C (when all of them are discarded), there is no compressed stencil sheet remaining in the discharge box. It is detected that no stencil sheet remains in the box. Thereafter, the count of the number of discharged plates is cleared in step S58, and the process returns to step S51.

  In the operation flow chart of the conventional example shown in FIG. 9, the operation in step S55A is performed after “full tank” is displayed for convenience of illustration, but the user deliberately inserts and removes the discharge box (discarding). In this case, the stencil sheet still remains in the stencil box after the stencil box is mounted again after the stencil box is mounted again. Detected and “full” is displayed.

  By the way, in the case of the above-described aspect of step S55A (when pretending to be discarded) and in the case of aspect of step S55B (when substantially discarded), the compressed stencil sheet remains in the stencil box. After the stencil sheet is detected by the inside of the stencil box, “full tank” is displayed again on the operation panel. Therefore, the user is prompted again to remove the stencil box, and “full tank” is displayed unless the stencil box is empty. Is displayed.

  At this time, there is a problem in which the removal of the stencil box is required even though there is a sufficient storage capacity for storing the stencil paper in the stencil box, and ink adheres to the light reflection type sensor of the detection means inside the stencil box. There is a problem that causes malfunctions, and this is a problem because the ease of use of the conventional stencil printer's plate removal device is deteriorated.

  Therefore, when a stencil box containing compressed stencil paper is removed from the stencil printing machine, especially when there is a sufficient storage capacity even if a small amount of compressed stencil paper remains in the stencil printing box. It is an object of the present invention to provide a plate removal apparatus for a stencil printing machine configured to solve problems and problems caused by ink adhering to the detection means inside the plate release box.

The present invention has been made in view of the above problems, and the invention according to claim 1 is a plate discharge transporting unit that transports a used stencil sheet removed from the plate cylinder in the plate discharge transport direction,
A stencil box for carrying the used stencil sheet transported by the stencil transport means through an opening and storing it inside;
Each time the used stencil sheet is sent from the plate cylinder into the stencil box, the stencil number counting means counts the number of stencil sheets used.
A movable compression member for compressing the used stencil sheet stored in the stencil box;
Compression member position detecting means for detecting that the compression member has reached an empty end position in the discharge plate box when the compression member is moved in the discharge plate box;
Control means for determining that the number of discharged plates is full when the predetermined full number of tanks is reached;
With
The control means clears the count of the number of discharged plates when the number of discharged plates has reached the predetermined full tank number and when the compression member reaches the end position when it is empty. A stencil discharging apparatus for a stencil printing machine.

  According to the stencil discharging apparatus of the stencil printing machine according to claim 1, when the number of stencils reaches a predetermined full tank number and the control means reaches the end position when the compression member is empty. Since the count of the number of discharged plates has been cleared, in particular, the compression member reaches the “end position when empty” in the discharged plate box, and a small amount of compressed stencil sheet remains in the discharged plate box. However, when there is a storage capacity, it is not necessary to prompt the user to remove the discharge box as described in the conventional example, and the next discharge operation can be permitted. Usability is improved.

It is the block diagram which showed the stencil discharge machine of the stencil printing machine concerning this invention in cross section, and the figure which showed the initial state of the apparatus. It is a figure for demonstrating the pulse width of the encoder pulse output from the encoder shown in FIG. It is the perspective view which expanded and showed the compression nail | claw shown in FIG. It is the figure which expanded and showed the control means shown in FIG. FIG. 5 is a cross-sectional view showing a state where the compression claw has reached an “end position when empty” in the plate ejection box in the plate ejection apparatus of the stencil printing machine according to the present invention. FIG. 3 is a cross-sectional view showing a state in which the compression claw has reached a “position when full” in the stencil box in the stencil printing machine according to the present invention. It is the 1st flowchart which showed the 1st operation | movement in the plate removal apparatus of the stencil printing machine which concerns on this invention. It is the 2nd flow figure showing the 2nd operation in the stencil discharge machine of the stencil printing machine concerning the present invention. It is the flowchart which showed the operation | movement in the plate discharging apparatus of the conventional stencil printer.

  Hereinafter, an embodiment of a stencil discharging apparatus for a stencil printing machine according to the present invention will be described in detail with reference to FIGS.

  The stencil discharging apparatus of the stencil printing machine according to the present invention is employed in a stencil printing machine capable of printing, for example, A3 size (420 mm × 297 mm) paper, and is removed from a plate cylinder provided rotatably in the stencil printing machine. The number of used stencil sheets discharged is counted each time the stencil sheet is sent into the stencil box, and the used stencil sheet removed from the plate cylinder is movable (rotatable) in the stencil box. When the compression member (compression claw) is moved (rotated) in the discharge plate box when the compression member (compression claw) is compressed, the compression member (compression claw) will be described later as “end position when empty” and “full tank”. By providing compression member position detection means (compression claw position detection means) for detecting that the "time position" has been reached, in particular, the compression member (compression claw) is located at the "end position when empty" in the discharge box. And a small amount of stencil in the waste box When there is enough storage capacity even if paper remains, there is no need to prompt the user to remove the discharge box again based on the detection result of the discharge box inside detection means as in the conventional example, and the next discharge operation is allowed. It is characterized by comprising.

  FIG. 1 is a cross-sectional view showing a stencil discharging apparatus of a stencil printing machine according to the present invention, and shows an initial state of the apparatus. FIG. 2 shows the pulse width of the encoder pulse output from the encoder shown in FIG. FIG. 3 is an enlarged perspective view of the compression claw shown in FIG. FIG. 4 is an enlarged view of the control means shown in FIG.

  As shown in FIG. 1, the stencil discharging apparatus 10 of the stencil printing machine according to the present invention is located in the vicinity of the downstream side in the rotational direction of the plate cylinder 2 provided in the stencil printing machine 1 so as to be rotatable counterclockwise (arrow direction). is set up.

  A plate making device 6 for making the stencil sheet G is installed in the vicinity of the upstream side in the rotational direction of the plate cylinder 2. This plate making apparatus 6 makes a perforated image portion of a stencil sheet G to be wound around the outer peripheral surface of the plate cylinder 2 by a thermal head (not shown) according to image information. Omitted.

  The above-described stencil discharging apparatus 10 of the stencil printing machine according to the present invention includes a used stencil sheet removed from the clamper 3 fixed to the outer peripheral surface of the plate cylinder 2 so as to be openable and closable (hereinafter referred to simply as stencil sheet) A plate discharge box 11 for compressing G and storing a large number of plates; and a plate discharge transport means 20 for transporting the used stencil sheet G removed from the plate cylinder 2 into the plate discharge box 11 installed downstream in the plate discharge transport direction. And a stencil sheet compression means 40 having a compression member (hereinafter referred to as a compression claw) 45 provided so as to be movable (rotatable) via a drive means (41 to 43) outside the upper part of the platen box 11; A control means 50 for controlling the entire apparatus and an operation panel 60 connected to the control means 50 for operating the plate discharging apparatus 10 are provided.

  Here, each member in the plate discharging apparatus 10 of the stencil printing machine according to the present invention will be described in order.

  First, as shown in FIG. 1, the above-mentioned discharge box 11 is detachably installed on a discharge box mounting table 4 fixedly installed near the plate cylinder 2 in a housing (not shown). At this time, in the through-hole 4 a formed in the plate removal box mounting table 4, a plate release box mounting detection unit 5 for detecting whether or not the plate release box 11 is mounted is attached. For example, although a light reflection type sensor is applied, a micro switch or the like can be used.

  The above-described discharge plate box 11 is formed in a box shape using a resin material, surrounded by a bottom plate 11a, left and right side plates (11b) and 11c, a rear plate 11d, and a top plate 11e. In addition, a large number of used stencil sheets G removed from the plate cylinder 2 can be stored (for example, about 100 plates).

  And since the used stencil paper G is conveyed corresponding to the longitudinal direction (conveying direction) of A3 size, for example, and compressed toward the compression direction which is the same direction as the discharged plate conveying direction, While the depth dimension in the compression direction of the formed stencil box 11 is set short, the dimension in the width direction corresponding to the short direction (direction perpendicular to the paper surface) perpendicular to the longitudinal direction of the stencil sheet G is the stencil sheet. It is set to be slightly longer than the width dimension of G.

  Further, the discharge box 11 has a front portion of the top plate 11e cut away, an upper opening 11f is opened at the top, and a compression space portion 11g for compressing the used stencil sheet G in the internal space. It has become.

  In addition, the bottom plate 11a of the discharge box 11 is formed in a curved shape along the rotation trajectory of the compression claw 45 from the front side below the upper opening 11f to the middle part toward the rear, and from the middle part to the rear plate 11d. It is formed flat toward the side.

  Further, a bottom plate rib 11h for preventing sticking of the stencil sheet G to which ink (not shown) adheres is extended on the inner surface of the bottom plate 11a of the plate releasing box 11 in the same direction as the compression direction. A plurality of pieces are provided integrally with the bottom plate 11a at intervals in the orthogonal direction.

  At this time, the plurality of bottom plate ribs 11h are formed so that the height from the inner surface of the bottom plate 11a is about 7 to 8 mm, and the thickness in the direction orthogonal to the compression direction is about 1.5 mm so that ink does not adhere. The gap between adjacent bottom plate ribs 11h in the direction orthogonal to the compression direction is formed to be about several tens of millimeters. Between the adjacent bottom plate ribs 11h, the base portion of the compression claw 45 is described later. A compression claw portion 45b having a thickness of about 1 to 2 mm protruding from 45a can be advanced and retracted.

  Further, a compression portion rib 11i for preventing sticking of the stencil sheet G to which ink is attached is also connected to the inner surface of the rear plate 11d of the discharge box 11 at a substantially right angle with the bottom plate rib 11h so as to be integrated with the rear plate 11d. A plurality are vertically installed.

  Further, an attachment / detachment mechanism portion 12 is attached to the outer surface of the rear plate 11d of the plate release box 11 so that the plate release box 11 can be detachably attached to the plate release box mounting table 4 (detachable).

  Next, the above-described stencil conveying means 20 is installed on the front side of the upper opening 11 f of the stencil box 11 and is supported by a housing (not shown), and is used stencil sheet removed from the plate cylinder 2. G has a function of carrying G into the discharge box 11 from the upper opening 11f.

  In the discharged plate conveying means 20, the first reduction gear train 22 is connected to the tip shaft of the first motor 21 that rotates through a command from the control means 50, and the last gear of the first reduction gear train 22 is placed on the paper surface. A vertical rotating shaft 23 is rotatably connected.

  The rotary shaft 23 described above is formed in a long shape corresponding to the width dimension of the stencil sheet G, and a plurality of drive pulleys 24 are spaced apart from the rotary shaft 23 along the width direction of the stencil sheet G at appropriate intervals. It is fixed.

  Further, driven pulleys 27 are rotatably provided at the tips of a plurality of swing arms 26 that are swingably supported on the shaft 25 corresponding to the plurality of drive pulleys 24, respectively. A plurality of intermediate pulleys 28 are rotatably provided via a shaft 29 between the plurality of driven pulleys 27.

  Further, a plurality of conveyor belts 30 are wound endlessly between a plurality of drive pulleys 24, a plurality of driven pulleys 27, and a plurality of intermediate pulleys 28.

  Further, below the plurality of conveyor belts 30, each discharge roller 31 that is driven and rotated in contact with each conveyor belt 30 is rotatably provided via a shaft 32.

  The used stencil sheet G removed from the plate cylinder 2 when the plate discharge conveying means 20 is configured as described above is held in the plate discharge box 11 while being nipped and conveyed by a plurality of conveyance belts 30 and a plurality of plate discharge rollers 31. Each plate is transported by one plate.

  Next, the above-described stencil sheet compression means 40 is installed on the outer side of the upper opening 11f of the discharge box 11 and is supported by a housing (not shown), and is a used stencil removed from the plate cylinder 2. The base paper G has a function of compressing the base paper G in the discharge box 11 by a rotatable (movable) compression claw (compression member) 45 described later.

  In the stencil sheet compression means 40, a second reduction gear train 42 is connected to the tip shaft of the second motor 41 that rotates through a command from the control means 50, and an encoder is connected to an appropriate gear of the second reduction gear train 42. 43 is engaged with a rotating slit (not shown), and a photo interrupter (not shown) is fixedly installed opposite to the rotating slit, and further, the final gear of the second reduction gear train 42 A rotation shaft 44 perpendicular to the paper surface is rotatably connected.

  The rotary shaft 44 is also formed in a long shape corresponding to the width dimension of the stencil sheet G in the same manner as the rotary shaft 23 in the plate discharge conveying means 20. It is rotatably provided above the outside of the opening 11f.

  A compression claw 45 is fixed to the rotating shaft 44 in the width direction of the used stencil sheet G, and a fan-shaped detection plate 46 is fixed to one end of the rotating shaft 44. Has been.

  Further, a standby position detection optical sensor 47 is fixedly installed facing the fan-shaped detection plate 46 fixed to one end of the rotation shaft 44, and the standby position detection optical sensor 47 is a compression claw 45. A light transmission type sensor is used to detect that the camera reaches the upper “standby position (initial position)”.

  The compression claw 45 is connected to a “standby position” indicated by a solid line integrally with the rotation shaft 44 by the driving force of the second motor 41 and the second reduction gear train 42 through a command from the control means 50, and two points. It can be rotated between the “end position when empty” indicated by a chain line, and can move back and forth in the discharge box 11.

  At this time, the encoder 43 rotates on the rotation claw (see FIG. 5) via the second reduction gear train 42 as the compression claw 45 rotates with reference to the “standby position” at which the compression claw 45 is initially waiting. (Not shown) is detected by a photo interrupter (not shown), and the number of encoder pulses P (FIG. 2) output from the photo interrupter is counted to indicate "end when empty" The “position” can be detected.

  Further, as shown in FIG. 2, the pulse width T of the encoder pulse P output from the encoder 43 increases according to the load (compression force) of the compression claw 45, and the compression claw 45 does not compress the stencil sheet G or When a small amount of compression reaches the “end position when empty”, the pulse width T1 is short, while the compression claw 45 compresses a large number of stencil sheets G and “position when full” (FIG. 6). ), The pulse width T2 is long. Therefore, the “full position” can be detected by measuring the pulse width T2 of the encoder pulse P through the control means 50.

  Here, as shown in FIG. 3, the compression claw 45 described above corresponds to the width dimension of the stencil sheet G along the long rotation shaft 44, and the long base 45 a that is made into a block rotates. While being fixed to the moving shaft 44, a plurality of compression claw portions 45b are formed protruding from the base portion 45a toward the plate cylinder 2 side (front side), and the plurality of compression claw portions 45b are formed on the stencil sheet G. It is provided at a predetermined interval along the width direction.

  At this time, the plurality of compression claws 45b formed on the base portion 45a of the compression claw 45 have a thickness in the width direction of the stencil sheet G of 1 to 1 so that ink on the ink surface (not shown) of the stencil sheet G is not attached. It is formed as thin as about 2 mm.

  Then, every time the used stencil sheet G is sent from the plate cylinder 2, the compression claw 45 is rotated together with the rotation shaft 44 from the “standby position” in the clockwise direction, so that the base 45a of the compression claw 45 is rotated. The used stencil sheet G stored in the discharge plate box 11 is compressed (smashed) by the plurality of compression claws 45b formed in FIG.

  In addition, although the example which provided the compression nail | claw (compression member) 45 rotatably was demonstrated in this Example, although illustration is abbreviate | omitted here, it does not restrict | limit, but a compression nail | claw (compression member) is discharged. For example, it may be configured to be able to reciprocate linearly between the front side (plate cylinder side) and the rear side (rear plate side) of the box, and the outer shape of the discharge plate box according to the movement of this compression claw Should be changed.

  Next, the control means 50 includes a CPU 50a, a ROM 50b, a RAM 50c, a first counter 50d, a second counter 50e, and a timer 50f as shown in an enlarged manner in FIG.

  The CPU 50a in the control unit 50 controls the stencil box mounting detection unit 5, the stencil conveyance unit 20, the stencil sheet compression unit 40, and the operation panel 60, respectively.

  The ROM 50b in the control means 50 stores operation programs for the stencil printing machine 1 and the plate discharging apparatus 10 and the like.

  The RAM 50c in the control means 50 temporarily stores various information that can be changed in the stencil printing machine 1 and the stencil discharging device 10, and in this embodiment, as will be described later, the number of stencil sheets G discharged. The predetermined full tank set value when the engine is full or the number of encoder pulses P output from the encoder 43 until the compression claw 45 reaches the “end position when empty” from the “standby position”. In addition, the pulse width T2 of the encoder pulse P when the compression claw 45 reaches the “full position” is stored.

  Further, the first counter 50d in the control means 50 counts the number of used stencil sheets G discharged in software every time the used stencil sheet G is sent from the plate cylinder 2 into the discharge box 11. (Hereinafter referred to as soft count).

  In this embodiment, the number of used stencil sheets G discharged is counted softly. However, the present invention is not limited to this. For example, the used stencil sheet G that has been sent from the plate cylinder 2 to the upstream side of the discharged plate conveying means 20 is used. An optical sensor for detecting the passage of the stencil sheet G is provided, and the number of discharged sheets can be determined by pulse counting the pulse output from the optical sensor by the first counter 50d in the control means 50. Therefore, the first counter in the control means 50 can be obtained. 50d functions as a number-of-removals counting means for performing a soft count or pulse count of the number of discharged stencil sheets G used.

  The second counter 50e in the control means 50 counts the number of encoder pulses P (FIG. 2) output from the encoder 43 in the stencil sheet compression means 40.

  Furthermore, the timer 50f in the control means 50 measures the pulse width T of the encoder pulse P (FIG. 2) output from the encoder 43 in the stencil sheet compression means 40.

  Then, as will be described later, the control means 50 determines that the full tank is full when the number of discharged plates has reached a predetermined full tank number.

  Returning to FIG. 1, the operation panel 60 described above is used to operate the stencil printing machine 1 and the plate discharging apparatus 10, such as “plate making key”, “print key”, “discharge key”, “stop key” and liquid crystal display (not shown). Here, when the number of used stencil sheets G sent from the plate cylinder 2 into the discharge box 11 reaches a predetermined full tank set value, or in the discharge box 11 Thus, only the full tank display portion 61 that displays “full tank” when the compression claw 45 reaches the “full tank position” is shown.

  Here, the operation of compressing the used stencil sheet G stored in the stencil box 11 by the compression claw 45 in the stencil discharging apparatus 10 of the stencil printing machine according to the present invention configured as described above will be described with reference to FIGS. Will be described.

  FIG. 5 is a sectional view showing a state in which the compression claw reaches the “end position when empty” in the stencil box in the stencil printing machine according to the present invention. FIG. 6 is a sectional view showing a state in which the compression claw has reached the “full position” in the stencil box in the stencil printing machine according to the present invention.

  First, as shown in FIG. 5, the plate cylinder 11 is detected every time the plate discharging operation is performed in the plate discharging apparatus 10 after detecting that the plate discharging box 11 is mounted on the plate discharging box mounting table 4 by the plate discharging box mounting detecting means 5. The number of used stencil sheets G discharged from 2 (FIG. 1) into the discharge box 11 is soft-counted by a first counter 50d in the control means 50 (FIG. 4).

  In addition, each time the stencil is discharged, the driving means (41 to 43) provided in the stencil sheet compression means 40 are operated to rotate the compression claw 45 clockwise from the “standby position” indicated by the two-dot chain line. Thus, the used stencil sheet G is compressed in the compression direction by the plurality of compression claw portions 45b protruding from the base portion 45a of the compression claw 45.

  Here, when the used stencil sheet G is not stored in the stencil box 11 or when a small amount is stored, the load on the stencil sheet G of the second motor 41 is light. It reaches the “end position when empty” shown in.

  At this time, with reference to the “standby position” detected by the fan-shaped detection plate 46 and the standby position detection optical sensor 47, the number of pulses of the encoder pulse P (FIG. 2) output from the encoder 43 is controlled by the control means 50 ( When the number of pulses is counted by the second counter 50e in FIG. 4) and this pulse number corresponds to the “end position when empty” stored in the RAM 50c in the control means 50, the compression claw 45 is “empty”. Can be detected.

  When the compression claw 45 reaches the “end position when empty”, a space between the compression side of the compression claw 45 that has reached the “end position when empty” and the rear plate 11d of the discharge box 11 A part of the space 11g1 of the compression space 11g is formed, and a small amount of used or compressed stencil sheet G can be stored in the part of the space 11g1.

  Further, the compression claw 45 that has reached the “end position when empty” temporarily stops at this position, and then rotates counterclockwise to return to the “standby position”.

  On the other hand, as shown in FIG. 6, in the state in which it is detected that the discharge box 11 is mounted on the discharge box mounting table 4 by the discharge box mounting detection means 5, the discharge box 11 protrudes from the base 45 a of the compression claw 45 in the discharge box 11. When a large amount of the compressed stencil sheet G compressed by the plurality of compressed claw portions 45b is already stored, the drive means (41 to 43) provided in the stencil sheet compressing means 40 are operated, When the compression claw 45 is rotated clockwise from the “standby position” indicated by the two-dot chain line, the load on the stencil sheet G of the second motor 41 becomes heavy, and the pulse width T of the encoder pulse P becomes longer.

  At this time, as described above with reference to FIG. 2, the pulse width T of the encoder pulse P output from the encoder 43 is measured by the timer 50f in the control means 50 (FIG. 4). 50. When the pulse width T2 of the encoder pulse P corresponding to the “full position” stored in the RAM 50c in the 50 is reached, it can be detected that the compression claw 45 has reached the “full position”. The “full tank” is displayed on the full tank display portion 61 of FIG. The compression claw 45 is temporarily stopped at the “full position”, and then the compression claw 45 returns to the “standby position”.

  From the above, the encoder 43, the second counter 50e and the timer 50f in the control means 50 (FIG. 4), the “end position when the compression claw (compression member) 45 is empty” and “full tank” It functions as a compression claw position detection means (compression member position detection means) for detecting the "position of".

  As described above, it is possible to detect that the compression claw 45 has reached the “end position when empty” and the “position when full”, and the operation of the plate discharging apparatus 10 of the stencil printing press according to the present invention. Will be described with reference to FIGS. 1 and 4 and new FIGS. 7 and 8. FIG.

  FIG. 7 shows a first operation flow in the stencil discharging apparatus of the stencil printing machine according to the present invention. FIG. 8 shows a second operation flow in the stencil discharging apparatus of the stencil printing machine according to the present invention.

  First, the first operation flow in the plate removing apparatus 10 of the stencil printing machine according to the present invention shown in FIG. 7 is illustrated so as to be compared with the operation flow of the conventional example described above with reference to FIG. The main focus is on the operation of the compression claw 45 when the box 11 is removed and then mounted again.

  In the following description, the steps from S11 to S15A, S15B, and 15C shown in FIG. 7 are exactly the same as the steps from S51 to S55A, S55B, and 55C shown in FIG. Yes, Steps S16 to S21 shown in FIG. 5 are operations that are the main part of this embodiment.

  As shown in FIG. 7, in the first operation flow of the embodiment, first, in step S11, an ink image is printed on the sheet by the stencil sheet G wound around the outer peripheral surface of the plate cylinder 2.

  Next, in step S12, after all printing is completed, the used stencil sheet G is removed from the plate cylinder 2 to perform the plate discharging operation, while the plate is transferred to the next stencil sheet G with respect to the outer peripheral surface of the plate cylinder 2. Change. Each time the plate discharging operation is performed, the control means 50 soft-counts the number of used stencil sheets G discharged from the plate cylinder 2 into the plate discharging box 11 by the first counter 50d provided therein.

  Next, in step S13, it is asked whether or not the soft count of the number of discharged plates counted every time the plate discharging operation is performed in step S12 is a predetermined full tank set value corresponding to the storage capacity of the discharged plate box 11. If the count has not reached the predetermined full tank set value stored in the RAM 50c in the control means 50 (NO), the process returns to step S11. On the other hand, when the software count of the number of discharged plates has reached a predetermined full tank set value (in the case of YES), “full tank” is displayed on the full tank display portion 61 of the operation panel 60 in step S14.

  Then, when “full tank” is lit on the operation panel 60, the user performs an operation of removing the discharge box 11. At this time, similarly to the conventional example described above with reference to FIG. There are three types of steps S15A to 15C as a mode of removing the discharge box 11.

  That is, in the above-described aspect of step S15A, the user performs the removal / removal of the discharge box 11 without discarding the compressed stencil sheet G stored in the discharge box 11 (when pretending to be discarded). .

  Further, in the above-described aspect of step S15B, the user substantially discards the compressed stencil sheet G stored in the evacuation box 11, but remains about 1 plate wide due to stickiness of the sticky ink ( (When almost discarded).

  At this time, the stencil sheet G to be discarded has adhesiveness due to the adhesion of ink, and tends to stick to the stencil box 11 and the stencil sheets to be discarded tend to stick to each other. Due to this sticking tendency, when the compressed stencil sheet G is discarded, about one plate may remain in the discharge box 11, and the remaining stencil sheet G is pulled by the above two sticking at the time of disposal, and the discharge box 11 May spread within.

  In the above-described aspect of step S15C, the user has discarded all the compressed stencil sheets G stored in the discharge box 11.

  Here, in the present invention, unlike the case of the conventional example described above with reference to FIG. 9, the removed plate box 11 is removed for each of the above-described three steps S15A, S15B, and S15C. After remounting, that is, after confirming remounting of the platen box 11 by the platen box mounting detection means 5 using a light reflection type sensor or the like attached to the platen box mounting table 4, all of steps S15A, S15B, and S15C are performed. In the case of the mode, printing is performed in step S16.

  Next, also in step S17, the plate discharging operation is performed for all cases of steps S15A, S15B, and S15C, while the plate is changed to the next stencil sheet G on the outer peripheral surface of the plate cylinder 2. Further, the used stencil sheet G is compressed by the compression claw 45 in the discharge plate box 11 in accordance with the discharge operation.

  And after passing through step S17, it is divided into two types, in the case of the mode of step S15A and in the case of each mode of steps S15B and 15C.

  That is, in the case of the mode of step S15A (when pretending to be discarded), the compression claw 45 does not reach the “end position when empty” in the plate ejection box 11 in step S18. That is, at this time, the compression claw 45 has a large load on the stencil sheet G, and the load of the second motor 41 is heavy as described above with reference to FIG. 6, and therefore does not reach the “end position when empty”. Is the case. In this case, without clearing the above-described soft count of the number of discharged plates in step S19, the “full tank” display 61 of the operation panel 60 blinks to indicate “full tank” and an alarm is issued, and the process returns to step S11 to print. And the subsequent plate removal operation is allowed.

  On the other hand, in the case of the mode of step S15B (when substantially discarded) and the mode of step S15C (when all are discarded), in step S20, the compression claw 45 is “empty” in the discharge box 11. Reach the end position. That is, at this time, the compression claw 45 has a small load on the stencil sheet G, and the load of the second motor 41 is light as described above with reference to FIG. In addition, as described above, the number of encoder pulses P output from the encoder 43 corresponds to the number of pulses corresponding to the “end position when empty” stored in the RAM 50c in the control means 50. In this case, the above-described soft count of the number of discharged plates is cleared in step S21, the process returns to step S11 to perform printing, and the subsequent discharging operation is permitted.

  In the first operation flow chart of the embodiment shown in FIG. 7, the operation of step S15A is performed after “full” is displayed for convenience of illustration, but the user intentionally inserts and removes the discharge box 11. Since the action (the action of pretending to be discarded) may be performed even before “full tank” is displayed, even in this case, the compression claw 45 is “empty when the plate removal box 11 is mounted again at the next plate removal operation. If the "end position" is not reached, printing may be performed without clearing the soft count.

  According to the first operation flow of the above-described embodiment, when the discharge box 11 containing the compressed stencil sheet G is removed and then mounted again, the control means 50 causes the discharge number to reach a predetermined full tank number. If the compression claw rotated during the next plate removal reaches the “end position when empty”, the software count of the number of plate removal is cleared.

  In particular, when the compression claw 45 reaches the “end position when empty” in the discharge plate box 11 and there is a storage capacity even if a small amount of compressed stencil sheet G remains in the discharge plate box 11. Since it is not necessary to prompt the user to remove the discharge box 11 as described in the conventional example, and the next discharge operation can be allowed, the use of the plate discharge apparatus 10 of the stencil printing machine is better than the conventional example. . Furthermore, the “end position when empty” and the “full position” when the compression claw 45 is rotated without the installation of the inside detection means as described in the conventional example with reference to FIG. Therefore, there is no need to worry about ink stains on the inside of the discharge box detection unit as described in the conventional example.

  Next, the second operation flow in the stencil discharging apparatus 10 of the stencil printing machine according to the present invention shown in FIG. 8 corresponds to the rotational position of the compression claw 45 that compresses the stencil sheet G used in the stencil box 11. The main purpose is to determine whether to clear or increase the soft count of the number of discharged plate of used stencil sheet G, and to determine whether or not plate making is possible by inserting / removing the discharged plate 11 after “full tank” is displayed. . An operation program corresponding to the second operation flow is stored in the ROM 50b in the control means 50.

  When the second operation flow of the embodiment shown in FIG. 8 is started, first, in step S31, it is inquired whether the user makes a plate making instruction or a printing instruction. At this time, the user selects and presses a plate making key or a printing key (not shown) provided in the operation panel 60, or instructs the plate making or printing from a personal computer (not shown).

  And when making a plate, it transfers to step S32 mentioned below. On the other hand, when printing is performed, the process proceeds to step S43 to be described later, and a printing operation is executed.

  Next, in step S32, since plate making was selected in step S31, it is asked whether or not the plate making prohibition flag is ON. If the plate making prohibition flag is ON (in the case of YES), the process proceeds to step S39 described later. And “Full” is displayed.

  On the other hand, if the plate making prohibition flag is OFF in step S32 (in the case of NO), plate making and discharging operation are performed in step S33. At this time, in the plate making, the plate making apparatus 6 makes a plate of unused stencil paper G for one plate. On the other hand, every time the used stencil sheet G is sent from the plate cylinder 2 into the stencil box 11, the stencil operation is performed by the first counter 50 d in the control means 50 to determine the number of stencil sheets G used. The used stencil sheet G that is counted and stored in the stencil box 11 is compressed by the compression claw 45.

  Next, in step S34, it is asked whether or not the soft count C of the number of discharged plates that has been soft counted each time the plate discharging operation is performed in step S33 is greater than a predetermined full tank set value. Here, if the soft count C of the number of discharged plates is smaller than a predetermined full tank set value stored in the RAM 50c in the control means 50 (in the case of NO), the soft count C of the number of discharged plates is increased by 1 (in step S38). C = C + 1) and asks whether there is a print instruction in step S42 described later.

  On the other hand, when the soft count C of the number of discharged plates is larger than the predetermined full tank set value in step S34 (in the case of YES), the compression claw 45 in the discharged plate 11 is “end position when empty” in step S35. Ask whether or not Here, as described above, whether or not the compression claw 45 has reached the “end position when empty” is stored in the RAM 50 c in the control means 50 as the number of encoder pulses P output from the encoder 43. The determination is made by matching the “end position when empty” with the corresponding pulse number.

  If the compression claw 45 reaches the “end position when empty” in step S35 (in the case of YES), the soft count C of the number of discharged plates is larger than a predetermined full tank set value. Since the compressed stencil sheet G stored in the stencil box 11 has already been completely discarded or left in a small amount by the user, the soft count C of the stencil number is cleared in step S37 (C = In step S42, which will be described later, it is asked whether or not there is a print instruction.

  On the other hand, when the compression claw 45 does not reach the “end position when empty” in step S35 (in the case of YES), the compressed stencil sheet G stored in the stencil box 11 is in a full state, Further, since the stencil sheet G is pretending to be discarded by the user, the soft count C of the number of discharged plates is incremented by 1 (C = C + 1) in step S36, and then “full tank” is set in step S39. This is displayed on the full tank display portion 61 of the operation panel 60, and the plate making prohibition flag is turned ON.

  Next, in step S40, the user is asked whether or not the removal box 11 has been inserted or removed. If the removal box 11 is inserted or removed (in the case of YES), the display of “full tank” is canceled in step S41. In addition, after the plate making prohibition flag is turned OFF, it is asked whether or not there is a print instruction in step S42.

  On the other hand, when there is no removal / insertion operation of the discharge box 11 in step S40 (in the case of NO), the process proceeds to step S42 to ask whether there is a print instruction.

  Next, when there is a print instruction in step S42 (in the case of YES), a printing operation is performed in step S43. In this printing operation, an ink image is printed on the sheet by the stencil sheet G wound around the outer peripheral surface of the plate cylinder 2, and this flow is finished when the printing operation is completed. After the printing operation is completed, if there is a plate making or printing instruction, the plate making or printing instruction is permitted, and the plate discharging operation is also permitted.

  On the other hand, if there is no print instruction in step S42 (NO), this flow ends.

  In the second operation flow of the above-described embodiment, either the step S33 to step S36 or the step S39 to step S41 may be preceded by a pattern.

  According to the second operation flow of the above-described embodiment, as in the first operation flow of the above-described embodiment, the control means 50 performs the following operation when the number of discharged plates has reached a predetermined full tank number and The soft count of the number of discharged plates is cleared when the compression claw rotated at the time of discharging the plate reaches the “end position when empty”.

  As described above, in the same manner as in the first operation flow described above, in particular, the compression claw 45 reaches the “end position when empty” in the discharge box 11 and is compressed in the discharge box 11. When there is a storage capacity even if a small amount of G remains, it is not necessary to prompt the user to remove the discharge box 11 as described in the conventional example, and the next plate discharge operation can be allowed. The ease of use of the plate discharging apparatus 10 of the printing press is improved. Furthermore, since it is possible to determine the “end position when empty” and the “full position” at the rotation position of the compression claw 45 without installing the inside detection means as described in the conventional example, There is no need to worry about ink stains on the inside of the discharge box detection unit as described in the conventional example.

DESCRIPTION OF SYMBOLS 1 ... Stencil printing machine, 2 ... Plate cylinder, 4 ... Discarding box mounting base, 5 ... Discarding box mounting detection means,
10 ... Plate removal device,
11 ... Plate release box, 11a ... Bottom plate, 11b, 11c ... Left and right side plates, 11d ... Rear plate,
11e ... Top plate, 11f ... Upper opening, 11g ... Compression space, 11h ... Bottom plate rib,
11i ... compression part rib,
20 ... Discharge plate conveying means, 21 ... First motor, 22 ... First reduction gear train, 31 ... Discharge plate roller,
40 ... stencil sheet compression means, 41 ... second motor, 42 ... second reduction gear train,
43 ... Encoder, 44 ... Rotating shaft,
45 ... compression member (compression nail), 45a ... base, 45b ... compression nail,
46 ... Fan-shaped detection plate, 47 ... Optical sensor for standby position detection,
50 ... control means, 50a ... CPU, 50b ... ROM, 50c ... RAM,
50d: first counter, 50e: second counter, 50f: timer,
50d: means for counting the number of discharged plates,
43, 50e, 50f ... compression member position detection means (compression claw position detection means),
G: Stencil paper, P: Encoder pulse, T: Pulse width of encoder pulse.

Claims (1)

A stencil transport means for transporting the used stencil sheet removed from the plate cylinder in the stencil transport direction;
A stencil box for carrying the used stencil sheet transported by the stencil transport means through an opening and storing it inside;
Each time the used stencil sheet is sent from the plate cylinder into the stencil box, the stencil number counting means counts the number of stencil sheets used.
A movable compression member for compressing the used stencil sheet stored in the stencil box;
Compression member position detecting means for detecting that the compression member has reached an empty end position in the discharge plate box when the compression member is moved in the discharge plate box;
Control means for determining that the number of discharged plates is full when the predetermined full number of tanks is reached;
With
The control means clears the count of the number of discharged plates when the number of discharged plates has reached the predetermined full tank number and when the compression member reaches the end position when it is empty. A stencil machine for discharging a stencil printing machine.

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