JP6654885B2 - Stencil printing machine - Google Patents

Description

  The present invention prints an ink image on a stencil sheet wound on the outer peripheral surface of a rotatable cylindrical plate cylinder while pressing the sheet with a press roller, and blows the printed sheet from a peeling fan. The present invention relates to a stencil printing apparatus that can surely peel off from a plate cylinder side by air blown.

  In general, a stencil printing apparatus clamps a stencil sheet (master) that has been made by a stencil plate with a clamp plate provided on a part of the outer peripheral surface of a rotatable cylindrical plate cylinder (drum) so as to be openable and closable. The base paper is wound along the outer peripheral surface of the plate cylinder.

  Then, while pressing the paper sent from the paper feed unit toward the stencil sheet side with a press roller provided so as to be able to freely contact and separate from the plate cylinder side, the ink supplied into the plate cylinder is thermally pierced on the stencil sheet to form a perforated image. The ink image corresponding to the perforated image of the stencil sheet is printed on the paper by passing through.

  Thereafter, the printed paper on which the ink image has been printed is peeled off from the plate cylinder side by an air knife (peeling fan) and a peeling claw installed close to the outer peripheral surface of the plate cylinder, and is discharged to a paper discharge section. Therefore, the same ink image can be printed many times with one stencil sheet, so that it is frequently used.

  In this type of stencil printing apparatus, a printed sheet on which an ink image corresponding to a perforated image of a stencil sheet (master) is printed is separated from the plate cylinder side using an air knife and a separation claw, and the separated printing is performed. There is a stencil printing apparatus that discharges a completed sheet onto a sheet discharge tray via a sheet discharge guide plate and a sheet discharge conveyance device installed downstream of the press roller in the sheet conveyance direction (for example, Patent Documents 1 and 2). reference).

  First, in the stencil printing apparatus disclosed in Patent Literature 1, although illustration is omitted here, when an ink image corresponding to a perforated image of a master (stencil sheet) is printed on a sheet, a sheet that has been printed at the time of printing is printed. The air volume of the fan of the air knife, which peels off from the plate cylinder side, is varied according to the temperature, and is controlled so that high temperature ≧ normal temperature> low temperature, so that the releasability from the printed paper can be maintained.

  Next, in the stencil printing apparatus disclosed in Patent Document 2, although not shown here, if there is a solid image portion in the pattern of the perforated image of the master (stencil sheet), the adhesive strength of the ink to the paper becomes extremely high. The printed paper cannot be peeled off by the peeling claw, and the printed paper remains stuck on the master, or the printed paper is caught by the peeling claw. It is configured to prevent occurrence.

JP 2006-116913 A JP 2003-25703 A

  By the way, in the stencil printing apparatuses described in Patent Literatures 1 and 2, as described above, the printed paper is improved by the air knife and the peeling claw so as to be easily peeled from the plate cylinder side.

  However, in the conventional stencil printing apparatuses described in Patent Literatures 1 and 2, when the printed paper is peeled from the plate cylinder side using an air knife and a peeling claw, the following problems occur. A point occurs.

  FIG. 9 schematically shows a problem which occurs when a printed sheet is peeled off from the plate cylinder side using an air knife and a peeling claw in a conventional stencil printing apparatus.

  As shown in FIG. 9, in a conventional stencil printing apparatus 100, a cylindrical plate cylinder 101 is provided so as to be rotatable counterclockwise (arrow direction) about a central axis 102. A stencil sheet (master) M, which has been made, is wound on the outer peripheral surface 101a of the cylindrical plate cylinder 101 while being clamped by a clamp plate 103 which can be opened and closed.

  Below the plate cylinder 101, a press roller 104 for pressing the sheet P toward the plate cylinder 101 via the stencil sheet M is rotatable with respect to the plate cylinder 101 via a rotatable arm 105. is set up.

  An air knife that separates the leading end Pa of the printed paper P from the plate cylinder 101 near the lower right of the outer peripheral surface 101a of the plate cylinder 101 downstream of the press roller 104 in the sheet transport direction. A (peeling fan) 106 and a peeling claw 107 are provided.

  Further, on the downstream side of the press roller 104 in the paper transport direction, a paper discharge guide plate 108 for guiding the printed paper P separated from the plate cylinder 101 side in the paper discharge direction is fixedly installed. Further, on the downstream side of the paper discharge guide plate 108 in the paper conveyance direction, a paper discharge conveyance device 109 that conveys the printed paper P passing through the paper discharge guide plate 108 toward the paper discharge tray 110 is provided. I have.

  In the conventional stencil printing apparatus 100 configured as described above, when the printed paper P is separated from the plate cylinder 101 using the air knife 106 and the separation claw 107, the air blown from the air knife 106 is used. The AR stays above the paper ejection guide plate 108 fixedly installed.

  Then, when the leading end Pa of the printed paper P is peeled from the plate cylinder 101 side by the air AR from the air knife 106 and the peeling claw 107, paper peeling for peeling the leading end Pa of the printed paper P is performed. The point HP is set at a substantially intermediate portion between the press roller 104 and the tip of the peeling claw 107, but the air AR stays above the paper discharge guide plate 108 and the air AR reaches the paper peeling point HP. Not reach.

  As a result, the separation of the leading end Pa of the printed sheet P is delayed, and the leading end Pa of the sheet P enters between the plate cylinder 101 and the peeling claw 107 while being adhered to the plate cylinder 101. Problems such as rising (rolling up) or the leading end Pa of the printed paper P being caught on the peeling claw 107 occur.

  In particular, as described in Patent Document 2, if there is a solid image portion in the pattern printed on the paper P, the leading end Pa of the printed paper P is separated more slowly, so that the rising is remarkable.

  Accordingly, the present invention provides an ink image on a stencil sheet wound around an outer peripheral surface of a rotatable cylindrical plate cylinder while pressing the sheet with a press roller to print an ink image on the sheet, and removes the printed sheet from the fan. When peeling from the plate cylinder side by the air blown from, the air from the peeling fan does not stay above the discharge guide plate installed downstream of the press roller in the paper transport direction, and An object of the present invention is to provide a stencil printing apparatus capable of reliably peeling a sheet printed by air from a plate cylinder side.

The present invention has been made in view of the above problems, and a first invention is to wind a stencil sheet on which a perforated image is formed around an outer peripheral surface of a rotatable cylindrical plate cylinder, and A printing unit that prints an ink image corresponding to the perforated image on a sheet of paper with ink oozing from the outer peripheral surface,
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate ,
The ventilation means forms a plurality of ventilation holes in the paper ejection guide plate for passing the air blown from the peeling fan toward a lower side of the paper ejection guide plate. A stencil printing machine, characterized in that an inclined piece inclined obliquely downward is overlapped with an upstream end of a sheet conveyance guide member provided in the sheet discharge conveyance means in the sheet conveyance direction below .

Further, in the second invention, the stencil sheet on which the perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and the ink is oozed from the outer peripheral surface of the plate cylinder on the paper. A printing unit that prints an ink image corresponding to the perforated image,
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate,
Further provided is a paper peeling point measuring means for measuring a paper peeling point set for peeling the leading end of the printed paper from the plate cylinder side by the air blown from the peeling fan,
The ventilation unit is configured to movably install the paper ejection guide plate on the downstream side of the printing unit in the paper conveyance direction, and the leading end of the printed paper is measured by the paper peeling point measurement unit. When reaching the peeling point, the discharge guide plate is so arranged that the air blown from the peeling fan passes below the discharge guide plate until the leading end of the printed sheet is peeled. While moving the upstream end in the paper transport direction, when the leading end of the printed paper reaches the paper peeling point, the upstream end of the paper discharge guide plate in the paper transport direction is returned to the original position. A stencil printing apparatus characterized in that:

According to a third aspect of the present invention, a stencil sheet on which a perforated image is formed is wound around an outer peripheral surface of a rotatable cylindrical plate cylinder, and the ink is oozed from the outer peripheral surface of the plate cylinder onto the paper. A printing unit that prints an ink image corresponding to the perforated image,
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The discharge guide plate has a ventilation hole formed so that the air blown from the peeling fan does not stay above the discharge guide plate.
A stencil printing apparatus characterized by the following.
According to a fourth aspect, in the stencil printing machine according to the third aspect, the vent hole is a hole formed as a closed curve in the paper discharge guide plate, and the air blown from the peeling fan is supplied to the paper discharge guide plate. A stencil printing machine characterized in that the stencil is passed downward from a plate.
According to a fifth aspect of the present invention, a stencil sheet on which a perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and the perforated image is formed on a sheet of paper with ink oozing from the outer peripheral surface of the plate cylinder. A printing unit that prints an ink image corresponding to
A peeling fan that peels the leading end of the printed paper printed by the printing unit from the plate cylinder side by air,
A peeling claw for peeling the printed sheet from the plate cylinder,
A discharge guide plate that is installed downstream of the printing unit in the paper conveyance direction and guides the printed paper separated by the separation fan and the separation claw in a discharge direction;
The printed sheet is disposed downstream of the sheet discharge guide plate in the sheet conveyance direction, and the printed sheet that has been separated by the separation fan and the separation claw and passed through the sheet discharge guide plate is conveyed toward a sheet discharge table. And a paper discharge conveying means,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate,
The ventilation means may have a plurality of ventilation holes formed in the discharge guide plate to allow the air blown from the peeling fan to pass downwardly of the discharge guide plate.
A stencil printing apparatus characterized by the following.

  According to the stencil printing apparatus of the first invention, the stencil paper is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder provided in the printing section, and an ink image corresponding to the perforated image of the stencil paper is printed on the paper. When the printed paper is peeled from the plate cylinder side by the air blown from the peeling fan, the printed paper tip is downstream from the printing unit in the paper transport direction to guide the printed paper in the paper discharge direction. The paper discharge guide plate installed in is provided with ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate.

  As a result, the air blown from the peeling fan by the ventilation means does not stay above the discharge guide plate. As a result, the air blown from the peeling fan can efficiently enter between the plate cylinder side and the leading end of the printed sheet near the lower side of the plate cylinder. There is no soaring while sticking to the torso side. Therefore, the leading end of the printed paper can be reliably peeled from the plate cylinder side by the air from the peeling fan, which can contribute to the improvement of the reliability of the stencil printing apparatus.

Further, according to the stencil printing apparatus of the first invention, the ventilation means applies the air blown from the peeling fan to the paper discharge guide plate fixedly installed on the downstream side of the printing section in the paper conveyance direction. A plurality of ventilation holes that pass downward, and are inclined obliquely downward at the upstream end in the paper transport direction of a paper transport guide member provided in the paper discharge transport means below the plurality of ventilation holes. The inclined pieces are overlapped.

As a result, the passing through the plurality of vent holes blown been air is formed in the discharge guide plate from the release fan downward, to the air does not stay above the discharge guide plate, printing already The leading end of the paper can be reliably peeled off from the plate cylinder side.

  Further, when the leading end of the printed paper passes through the plurality of ventilation holes formed in the paper ejection guide plate, the leading end of the printed paper overlaps below the plurality of ventilation holes to form a paper transport. The sheet is smoothly conveyed onto the sheet conveyance guide member by the inclined piece of the guide member.

  Furthermore, since a plurality of ventilation holes are formed in the paper ejection guide plate fixedly installed, the structure of the ventilation means is simple and can be provided at low cost.

Further, according to the stencil printing apparatus of the second invention, a paper peeling point measuring means for measuring a paper peeling point set for peeling off the leading end of the printed paper from the plate cylinder side by air blown from a peeling fan. The ventilation means further comprises a paper discharge guide plate movably installed downstream of the printing unit in the paper transport direction, and the leading end of the printed paper is a paper peeling point measured by the paper peeling point measuring means. At the upstream end of the paper discharge guide plate in the paper transport direction so that the air blown from the peeling fan passes below the paper discharge guide plate until the leading end of the printed paper is peeled. When the leading end of the printed sheet reaches the sheet peeling point, the upstream end of the sheet ejection guide plate in the sheet conveying direction is returned to the original position.

  As a result, the air blown from the peeling fan by the movement of the paper discharge guide plate passes below the paper discharge guide plate, and this air does not stay above the paper discharge guide plate. As in the case of the above effect, the leading end of the printed sheet can be reliably peeled off from the plate cylinder side.

  Further, after the leading end of the printed paper is separated from the plate cylinder side, the paper ejection guide plate returns to the original position, so that the printed paper is reliably conveyed along the paper ejection guide plate in the paper ejection direction. be able to.

1 is an overall configuration diagram illustrating an overall configuration of a stencil printing apparatus according to the present invention. In the stencil printing apparatus according to the present invention, a side view showing, in an enlarged manner, a printing section, a sheet peeling section, a ventilation means of the first embodiment provided on a sheet ejection guide plate, and a sheet conveyance guide member provided in the sheet ejection section. is there. FIG. 3 is an enlarged top view showing a ventilation means of the first embodiment provided on the paper discharge guide plate shown in FIG. 2 and a paper transport guide member provided in a paper discharge unit. FIGS. 2A and 2B are perspective views showing the stencil printing apparatus according to the present invention when the ventilation means of the first embodiment is viewed from the upper surface side and the lower surface side, respectively. In the stencil printing apparatus according to the present invention, a side view showing, in an enlarged manner, a printing section, a paper peeling section, a ventilation means of the second embodiment provided on a paper discharge guide plate, and a paper transport guide member provided in the paper discharge section. is there. (A), (b) is a side view which showed operation | movement of the ventilation means of 2nd Embodiment provided in the paper discharge guide plate shown in FIG. In the stencil printing apparatus according to the present invention, a side view showing, in an enlarged manner, a printing unit, a paper peeling unit, a ventilation means of a third embodiment provided on a paper discharge guide plate, and a paper conveyance guide member provided in the paper discharge unit. is there. (A), (b) is a side view showing the operation of the ventilation means of the third embodiment provided on the paper ejection guide plate shown in FIG. FIG. 9 is a diagram schematically illustrating a problem that occurs when a printed sheet is peeled from a plate cylinder side using an air knife and a peeling claw in a conventional stencil printing apparatus.

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

  FIG. 1 shows the overall configuration of a stencil printing apparatus according to the present invention.

  As shown in FIG. 1, in a stencil printing apparatus 10 according to the present invention, an apparatus housing 11 that forms the external appearance of the apparatus 10 is formed in a box shape.

  The stencil printing apparatus 10 includes an operation panel section 15 for operating the apparatus 10, a document reading section 20 for reading a document (not shown) on which image information such as images and characters are described, and a document reading section 20. A stencil unit 25 for making a stencil sheet (also referred to as a master) for one plate based on the read image information of the original, and a part of an outer peripheral surface 51a of a plate cylinder 51 provided in a printing unit 50 described later. And a cam drive unit 30 that opens and closes a clamp plate 56 that is openably mounted.

  In addition, the stencil printing apparatus 10 includes a sheet feeding unit 40 that feeds unprinted sheets P one by one, and an outer peripheral surface 51 a of a rotatable cylindrical plate cylinder 51 via a clamp plate 56 for one plate. A printing unit 50 for winding the stencil sheet M to print the unprinted sheet P;

  Further, the stencil printing apparatus 10 separates the printed sheet P from the plate cylinder 51 side by a sheet peeling unit 65 having a peeling fan 66 and a peeling claw 68, and a printed sheet P peeled by the sheet peeling unit 65. Ventilation means 70 for preventing the air AR blown from the peeling fan 66 from staying above the paper discharge guide plate 71 for guiding in the paper discharge direction, and the paper discharge guide plate 71 peeled off by the paper peeling section 65 , A discharge unit 90 for discharging the used stencil sheet M, and a control unit 95 for controlling the stencil printing apparatus 10 as a whole. ing.

  Here, each part in the stencil printing apparatus 10 will be specifically described step by step.

  First, the operation panel unit 15 is installed on the left (or front) of the top surface 11 a of the device housing 11. Although not shown in detail, the operation panel unit 15 includes various function buttons for performing a print job, ten keys, a liquid crystal display panel, and the like.

  In the operation panel section 15, each section is operated by the user operating various function buttons.

  Next, the document reading unit 20 is installed on the top surface 11 a of the apparatus housing 11. The document reading unit 20 includes a scanner that reads a document on which image information such as images and characters are described, and the read image information is sent to the plate making unit 25.

  Next, the plate making unit 25 is installed at an upper right part in the apparatus housing 11. The stencil making section 25 includes a thermal head for thermally piercing a perforated image on a stencil sheet (master) M wound in a roll shape in accordance with image information from the document reading section 20, and a stencil sheet M having the heat-sensitive perforation. And a cutter blade for cutting into one plate having a length of, and the cutter blade is cut into a size corresponding to, for example, A3 size (420 mm × 297 mm) paper P which is the maximum size, and the stencil sheet for one plate is cut. After the stencil sheet M is made, the stencil sheet M that has been made is conveyed toward the plate cylinder 51 in the printing section 50.

  Next, the cam driving unit 30 is installed close to the upper part of the plate cylinder 51 in the printing unit 50 and downstream of the plate making unit 25, and when the stencil sheet M for one plate is to be printed on the plate cylinder 51. A cam (not shown) for opening a clamp plate 56 attached to a part of the outer peripheral surface 51a of the plate cylinder 51 is driven.

  Next, the paper feeding unit 40 is installed on the left side surface 11 b side of the apparatus housing 11. The paper supply unit 40 includes a paper supply table 41 for stacking a plurality of unprinted papers P, and a gear train 43 for rotating the paper supply motor 42 to supply the papers P stacked on the paper supply table 41. The paper feed roller 44 and the separating roller 45 that are decelerated and rotate in the sheet feeding direction, and a separating plate 46 provided to face the separating roller 45 are provided.

  Further, the paper feeding unit 40 is provided with a pair of registration rollers 47 arranged downstream of the separation roller 45 and the separation plate 46, and arranged downstream of the registration roller pair 47 and upstream of the press roller 61 in the printing unit 50. And an optical sensor 48 for detecting the leading end of the sheet.

  Then, in the paper supply unit 40, the paper supply roller 44 is pressed against the uppermost paper P among the plurality of papers P stacked on the paper supply table 41 while rotating to take out the upper paper P.

  Thereafter, the paper P taken out by the paper feed roller 44 is separated one by one when the paper P is nipped and conveyed between the separation roller 45 and the separation plate 46, and fed to the downstream registration roller pair 47. Have been. Here, the registration roller pair 47 rotates at a predetermined timing after correcting the skew of the sheet P by abutting the sheet P during the rotation stop to form a loop L. Thereafter, the leading edge Pa of the sheet P is detected by the sheet leading edge detecting optical sensor 48, and the sheet P is sent to the downstream printing unit 50.

  Next, the printing unit 50 is installed at a substantially central part in the apparatus housing 11. In the printing unit 50, the outer diameter φD is formed in a cylindrical shape with an outer diameter φ of about 180 mm corresponding to the longitudinal dimension 420 mm of the A3 size paper P in which the plate cylinder 51 has the maximum size. The axial direction is formed to be long corresponding to the dimension 297 mm in the short side direction.

  The plate cylinder 51 is driven to rotate around a central axis 52 by a plate cylinder motor 53 in a counterclockwise direction (arrow direction) at a predetermined speed set in advance. An ink insertion port 52a for inserting the ink IK is formed on one end surface side of the central shaft 52 of the plate cylinder 51.

  The plate cylinder motor 53 is a geared motor having a built-in reduction gear. An encoder 54 is attached to a rear end shaft (not shown) of the plate cylinder motor 53, and the encoder 54 rotates the plate cylinder 51. The pulses indicating the rotation angle at the time of the rotation are sequentially output.

  A plate mount 55 is fixed to a part of the outer peripheral surface 51a of the plate cylinder 51, and a clamp plate 56 for clamping a stencil sheet M for one plate is mounted on the plate mount 55 in an openable and closable manner. ing.

  At this time, the outer peripheral surface 51a of the plate cylinder 51 is a portion where the ink IK does not seep out before and after a part of the plate mount 55, so that the ink IK seeps except for a part before and after the plate mount 55. It has porosity.

  A reflection member 57 is attached to a substantially central portion in the axial direction of the plate cylinder 51 on the outer peripheral surface 51a of the plate cylinder 51 in the rotation direction downstream of the plate mounting table 55.

  In addition, a light reflection type sensor 58 is installed outside the outer peripheral surface 51a of the plate cylinder 51 in correspondence with the position of the reflector 57 when the plate mounting table 55 on the plate cylinder 51 reaches the upper side. The presence or absence of the stencil sheet M on the outer peripheral surface 51a of the plate cylinder 51 can be detected by the reflection member 57 and the light reflection type sensor 58.

  A doctor roller 59 and an ink roller 60 are rotatably provided below the plate cylinder 51 while being in contact with each other. Further, ink IK supplied from the ink insertion port 52a of the plate cylinder 51 is accumulated between the doctor roller 59 and the ink roller 60, and the ink IK passes through a gap between the doctor roller 59 and the ink roller 60, and The ink is supplied from the outer peripheral surface of the ink roller 60 to the perforated image of the stencil sheet M wound around the outer peripheral surface 51a of the plate cylinder 51.

  A press roller 61 is provided below the plate cylinder 51 by a press roller contact / separation mechanism (not shown) so as to be able to freely contact and separate from the outer peripheral surface 51a of the plate cylinder 51 with a predetermined pressing force.

  The above-described press roller 61 is separated from the outer peripheral surface 51a of the plate cylinder 51 when the clamp plate 56 provided on a part of the outer peripheral surface 51a passes downward as the plate cylinder 51 rotates. I have.

  In the printing unit 50, the plate cylinder 51 starts rotating counterclockwise from the plate cylinder reference position set at the upper right portion, and is opened and closed on a part of the outer peripheral surface 51 a of the plate cylinder 51. When the plate 56 reaches the upper plate receiving position, the clamp plate 56 is opened by the cam drive unit 30 to clamp the stencil sheet M having been stencil sent from the plate making unit 25.

  Thereafter, after the clamp plate 56 on which the stencil sheet M is clamped passes through the press roller 61, the unprinted sheet P sent from the paper supply unit 40 is wound around the outer peripheral surface 51 a of the plate cylinder 51 by the press roller 61. The ink image corresponding to the perforated image of the stencil sheet M is pressed against the stencil sheet M with the ink IK oozing out from the outer peripheral surface 51a of the plate cylinder 51 while pressing the stencil sheet M having the stencil formed thereon and transporting the sheet P toward the downstream side. Printing on top.

  Next, the sheet peeling section 65 is installed close to the lower right of the outer peripheral surface 51 a of the plate cylinder 51.

  In the sheet peeling section 65, a fan 66b is built in a duct 66a, and a peeling fan (air knife) 66 that blows air AR from the fan 66b toward the right side of the outer peripheral surface 51a of the plate cylinder 51; An air guide plate 67 for guiding the air AR blown from the peeling fan 66 toward the lower side of the outer peripheral surface 51a of the plate cylinder 51, and the leading end Pa of the printed paper P printed by the printing unit 50 to the plate cylinder 51. And a peeling claw 68 that peels from the side.

  At this time, the peeling claw 68 is attached to a substantially central portion of the plate cylinder 51 in the axial direction with a width of about 5 mm, and the tip of the peeling claw 68 is formed on the outer peripheral surface 51a of the plate cylinder 51. It faces downward.

  Further, a paper peeling point HP for peeling the leading end Pa of the printed paper P from the plate cylinder 51 side is located between the press roller 61 and the leading end of the peeling claw 68 below the outer peripheral surface 51a of the plate cylinder 51. Is set at a substantially intermediate portion of

  Further, the paper passage time during which the paper P passes between the paper leading end detection optical sensor 48 installed at the lower left of the outer peripheral surface 51a of the plate cylinder 51 and the paper peeling point HP is stored in a control unit 95 described later. It is stored in advance.

  After the leading edge portion Pa of the paper P is detected by the leading edge portion detecting optical sensor 48, the elapse of the above-described paper passage time is measured by a timer 95d in the control unit 95 described later, and the measured time is controlled. When the paper passage time matches the paper passage time stored in advance in the unit 95, it is possible to confirm that the leading end Pa of the printed paper P has reached the paper peeling point HP.

  Therefore, the sheet leading edge detection optical sensor 48 and the control unit 95 constitute a sheet peeling point measuring unit that measures the sheet peeling point HP at which the leading end Pa of the printed sheet P is peeled.

  From the above, the air AR blown from the peeling fan 66 travels along the outer peripheral surface 51a of the plate cylinder 51 via the air guide plate 67 toward the paper peeling point HP set to the lower right of the outer peripheral surface 51a of the plate cylinder 51. . Then, from the stencil sheet M wound around the outer peripheral surface 51a of the plate cylinder 51, the substantially central portion of the leading end portion Pa of the printed sheet P is peeled off by the peeling nail 68, and the peeling nail 68 makes a peeling trigger. The leading end Pa of the paper P is peeled off near the paper peeling point HP by the air AR.

  Next, the ventilation means 70 is installed below the outer peripheral surface 51a of the plate cylinder 51 and downstream of the press roller 61 provided in the printing unit 50 in the paper transport direction.

  In this ventilation means 70, measures are taken so that the air AR blown from the peeling fan 66 provided in the paper peeling section 65 does not stay on the paper discharge guide plate 71 installed downstream of the press roller 61 in the paper transport direction. I am giving.

  The above-described ventilation means 70 constitutes a main part of the present invention, and is described in terms of (the ventilation means of the first embodiment), (the ventilation means of the second embodiment), and (the ventilation means of the third embodiment). As described later in this order, any one of the ventilation means of the first to third embodiments is applied in the apparatus housing 11.

  Next, the paper discharge unit 80 is installed on the right side surface 11c side of the apparatus housing 11 downstream of the paper discharge guide plate 71 in the ventilation means 70.

  In the paper discharge unit 80, a paper conveyance guide member 81 that guides the conveyance of the printed paper P that has been separated by the paper separation unit 65 and passed through the paper discharge guide plate 71 is fixedly installed downstream of the paper discharge guide plate 71. Have been. The paper transport guide member 81 has an upper surface formed in a flat plate shape, a plurality of air suction holes formed through the upper surface, and both ends in the paper width direction bent downward.

  An endless belt 82 having a plurality of air suction holes is provided on the upper surface of the paper transport guide member 81 so as to be rotatable in the paper discharge direction. At this time, the endless belt 82 is stretched between a driving pulley 84 driven to rotate counterclockwise by a motor 83 and a driven pulley 85 driven by the driving pulley 84.

  Further, in the paper conveyance guide member 81, air suction for printing the paper P through a plurality of air suction holes formed in the paper conveyance guide member 81 and a plurality of air suction holes formed in the endless belt 82 is provided. A fan 86 is provided.

  From the above, the paper conveyance guide member 81, the endless belt 82, the motor 83, the driving pulley 84, the driven pulley 85, and the air suction fan 86 provided in the paper discharge unit 80 are used for the printed paper passing through the paper discharge guide plate 71. It is configured as a paper discharge conveyance means (81-86) for conveying P toward the paper discharge table 87.

  The printed paper P that has passed through the paper discharge guide plate 71 is discharged onto the paper discharge table 87 by the rotation of the endless belt 82 while being sucked by the air suction fan 86.

  Next, the plate discharge unit 90 is installed in the upper left part of the plate cylinder 51 in the apparatus housing 11. In the plate discharging section 90, a used stencil sheet M peeled from the outer peripheral surface 51a of the plate cylinder 51 is stored in a plate discharging box (not shown).

  Next, the control unit 95 is installed at an appropriate position in the apparatus housing 11. The control unit 95 determines whether or not the leading end portion Pa of the sheet P has reached the above-described sheet peeling point HP, performs various determinations, and the ROM 95b which stores an operation program of the stencil printing apparatus 10 and the like. A RAM 95c for temporarily storing various information that can be changed in the stencil printing apparatus 10 and a paper passage time in which the paper P passes between the optical sensor 48 for detecting the leading edge of the paper and the paper peeling point HP; It has a timer 95d for measuring the paper passage time described above.

  The control unit 95 includes an operation panel unit 15, a document reading unit 20, a plate making unit 25, a cam driving unit 30, a paper feeding unit 40, a printing unit 50, a paper peeling unit 65, a ventilation unit 70 , The paper discharge unit 80, and the plate discharge unit 90.

  Further, the control unit 95 determines that the leading end Pa of the printed sheet P has reached the sheet peeling point HP when the sheet passing time measured by the timer 95d matches the sheet passing time stored in the RAM 95c.

  Here, in the stencil printing apparatus 10 configured as described above, the ventilation means 70 constituting a main part of the present invention will be described in the order of the first embodiment, the second embodiment, and the third embodiment.

(Ventilation means of the first embodiment)
FIG. 2 is an enlarged view of a stencil printing apparatus according to the present invention, in which a printing unit, a paper peeling unit, a ventilation means of the first embodiment provided on a paper discharge guide plate, and a paper transport guide member provided in the paper discharge unit. I have. In FIG. 2, the stencil sheet wound around the outer peripheral surface of the plate cylinder is not shown for convenience of illustration.

  FIG. 3 is an enlarged view of the ventilation means of the first embodiment provided on the paper ejection guide plate shown in FIG. 2 and the paper transport guide member provided in the paper ejection unit. FIGS. 4A and 4B are perspective views of the stencil printing apparatus according to the present invention when the ventilation means of the first embodiment is viewed from the upper surface and the lower surface, respectively.

  In the ventilation means 70A (70) of the first embodiment shown in FIG. 2, the air AR blown from the peeling fan 66 of the paper peeling section 65 stays above the paper discharge guide plate 71A (71) in the first embodiment. In order not to prevent the air AR from escaping, a discharge guide plate 71A fixed and installed in the apparatus housing 11 (FIG. 1) is provided.

  That is, as shown in FIGS. 2 and 3, in the ventilation means 70A (70) of the first embodiment, the paper ejection guide plate 71A for guiding the printed paper P printed by the printing unit 50 in the paper ejection direction is pressed. It is fixedly installed downstream of the roller 61.

  The sheet discharge guide plate 71A according to the first embodiment has an upstream end close to the press roller 61 and both ends in the sheet width direction on the downstream end side provided in the sheet discharge section 80 in the first embodiment. It is mounted on the upstream end side of the upper surface 81u of the member 81A (81), and is fixedly installed in the apparatus housing 11 (FIG. 1) by fixing means (not shown).

  As shown in FIGS. 3 and 4 (a) and 4 (b), the paper discharge guide plate 71A has a paper conveyance direction that is short and a paper width direction that is slightly wider than the width of the paper P having the maximum size. The upper surface 71u is formed in a flat plate shape.

  Since a bent piece 71m is slightly bent downward at the upstream end of the paper discharge guide plate 71A, the bent piece 71m provides rigidity to the flat upper surface 71u.

  In the downstream end side of the paper ejection guide plate 71A, the vicinity of the central portion in the paper width direction is slightly recessed toward the upstream side (inside) from both ends in the paper width direction, and the central portion in the paper width direction. A plurality of ventilation holes 71h are formed to penetrate at positions substantially symmetrical with respect to. Each of the plurality of ventilation holes 71h has a rectangular shape in which the paper transport direction is long and the paper width direction is narrower than the paper transport direction, and here, for example, a total of four locations are formed. .

  The plurality of ventilation holes 71h pass the air AR blown from the peeling fan 66 in the paper peeling section 65 downward to the discharge guide plate 71A without staying above the discharge guide plate 71A. It has a function to make it work.

  Therefore, the plurality of ventilation holes 71h formed in the fixedly installed paper ejection guide plate 71A constitute the ventilation means 70A of the first embodiment.

  On the other hand, the sheet conveying guide member 81A of the sheet discharging section 80 has a pair of bent pieces 81m, 81m bent at both ends in the sheet width direction so as to face each other and to be bent downward. The rigidity to the flat upper surface 81u is obtained by 81m.

  At the upstream end of the sheet transport guide member 81A, a pair of inclined pieces 81k, 81k are formed obliquely downward at substantially symmetric positions with respect to the central portion in the sheet width direction.

  Further, a pair of inclined pieces 81k, 81k formed in the paper transport guide member 81A are opposed to the lower surface of the paper discharge guide plate 71A, and a plurality of ventilation holes 71h formed through the paper discharge guide plate 71A. Are arranged so as to overlap each other below.

  Therefore, when the leading end portion Pa of the printed sheet P passes through the plurality of ventilation holes 71h formed to penetrate the discharge guide plate 71A, the leading end portion Pa of the sheet P is formed on the sheet transport guide member 81A. The pair of inclined pieces 81k, 81k allow the paper to be passed smoothly without being caught on the upstream end side of the sheet transport guide member 81A.

  Further, on the upper surface 81u of the paper transport guide member 81A, in the vicinity of the central portion in the paper width direction, three endless belts 82 for discharging and transporting the printed paper P are respectively driven by a driving pulley 84 and a driven pulley driven by the driving pulley 84. It is bridged between the pulley 85 and it. The three endless belts 82 are wound while rotating in the sheet discharging direction from the upper surface 81u side to the lower surface side of the paper transport guide member 81A.

  In the ventilation means 70A of the first embodiment, since the paper ejection guide plate 71A (71) in the first embodiment is fixedly installed, the paper peeling point measuring means for measuring the paper peeling point HP described above. 48, 95 (FIG. 1) need not function.

  According to the ventilation means 70A (70) of the first embodiment configured as described above, a plurality of ventilation holes 71h are formed in the paper ejection guide plate 71A fixedly installed downstream of the printing unit 50. The air AR blown from the peeling fan 66 passes downward through a plurality of ventilation holes 71h formed in the paper discharge guide plate 71A.

  Accordingly, the air AR blown from the peeling fan 66 does not stay above the sheet discharge guide plate 71A, and the air AR from the peeling fan 66 is printed near the plate cylinder 51 and the printed paper near the lower side of the plate cylinder 51. Since the paper P can efficiently enter the leading edge Pa of the paper P, the leading edge Pa of the printed paper P does not fly up while being stuck to the plate cylinder 51 side. The tip Pa does not catch on the peeling claw 68.

  Therefore, the front end Pa of the printed sheet P can be reliably separated from the plate cylinder 51 near the lower portion of the plate cylinder 51 by the air AR blown from the separation fan 66, and the stencil printing apparatus 10 (FIG. It can contribute to the improvement of the reliability of 1).

  Further, when the leading end portion Pa of the printed paper P passes through the plurality of ventilation holes 71h formed in the paper ejection guide plate 71A, the leading end portion Pa of the printed paper P is overlaid below the plurality of ventilation holes 71h. The wrapped sheet conveyance guide member 81A is smoothly conveyed onto the sheet conveyance guide member 81A by the pair of inclined pieces 81k, 81k.

  Further, since a plurality of ventilation holes 71h are formed in the paper ejection guide plate 71A fixedly installed, the structure of the ventilation means 70A of the first embodiment is simple and can be provided at low cost.

(Ventilation means of the second embodiment)
FIG. 5 is an enlarged view of a stencil printing apparatus according to the present invention, in which a printing section, a sheet peeling section, a ventilation means according to the second embodiment provided on a sheet discharge guide plate, and a sheet transport guide member provided in the sheet discharge section. I have. In FIG. 5, the stencil sheet wound around the outer peripheral surface of the plate cylinder is not shown for convenience of illustration.

  In the ventilation means 70B (70) of the second embodiment shown in FIG. 5, a sheet set to peel the leading end Pa of the printed sheet P from the plate cylinder 51 side by the air AR blown from the peeling fan 66. The paper peeling point measuring means 48, 95 (FIG. 1) for measuring the peeling point HP is effectively functioning. In addition, in order to prevent the air AR blown from the peeling fan 66 of the paper peeling section 65 from staying above the paper discharge guide plate 71B (71) in the second embodiment, the movably disposed upstream of the paper discharge guide plate 71B. A measure is taken to move the end side linearly so as to be largely separated from the press roller 61 to release the air AR.

  That is, as shown in FIG. 5, in the ventilation means 70B (70) of the second embodiment, the paper ejection guide plate 71B for guiding the printed paper P printed by the printing unit 50 in the paper ejection direction is provided by the press roller 61. Is movably installed downstream.

  The upper surface of the paper discharge guide plate 81B (81) according to the second embodiment in which the upstream end is close to the press roller 61 and the downstream end is provided in the paper discharge unit 80 is the above-described discharge guide plate 71B. It is slidably mounted on the upstream end side of 81u.

  The paper ejection guide plate 71B is long in the sheet conveyance direction and slightly wider in the sheet width direction than the width of the sheet P having the maximum size. The upper surface 71u is formed in a flat plate shape.

  Further, as in the first embodiment, a bent piece 71m is slightly bent downward at the upstream end of the paper discharge guide plate 71B. Has gained rigidity.

  Then, at the initial stage when the ventilation means 70B of the second embodiment is not operating or during normal printing during paper printing, the bent piece 71m of the paper ejection guide plate 71B approaches the press roller 61 with a slight gap. ing. For this reason, at the initial stage or at the time of normal printing, the air AR blown from the peeling fan 66 easily stays above the discharge guide plate 71B.

  In the downstream end side of the paper ejection guide plate 71B, as in the first embodiment, the vicinity of the center in the paper width direction is slightly recessed toward the upstream side (inside) from both ends in the paper width direction. The plurality of ventilation holes as described in the first embodiment are not formed and remain flat.

  As described above, the sheet transport guide member 81B in the second embodiment does not have the pair of inclined pieces formed at the upstream end as described in the first embodiment, but the other portions are the same as those in the first embodiment. Is formed.

  The paper discharge guide plate 71B converts the rotation of the motor 72 into linear movement while decelerating the rotation of the motor 72, and reciprocates in the directions of arrows X1 and X2 while sliding on the upper surface 81u of the paper transport guide member 81B. It is provided movably.

  Here, the operation of the ventilation means 70B (70) of the second embodiment will be described with reference to FIGS. 6 (a) and 6 (b).

  6A and 6B show the operation of the ventilation means of the second embodiment provided on the paper ejection guide plate shown in FIG. 5, and FIG. 6A shows a state in which the upstream end side of the paper ejection guide plate is largely separated from the press roller. (B) shows a state in which the upstream end side of the discharge guide plate approaches the press roller. 6A and 6B, the illustration of the stencil sheet wound around the outer peripheral surface of the plate cylinder is omitted.

  First, when the paper ejection guide plate 71B is in the state of normal printing shown in FIG. 5, the leading end Pa of the printed paper P moves between the lower part of the outer peripheral surface 51a of the plate cylinder 51 and the press roller 61. pass.

  At this time, as shown in FIG. 6A, before the leading end Pa of the printed paper P reaches the paper peeling point HP measured by the paper peeling point measuring means 48, 95 (FIG. 1), the control unit In response to a command 95 (FIG. 1), the motor 72 is rotated forward to move the sheet discharge guide plate 71B downstream (in the direction of arrow X1) along the sheet transport guide member 81B via the linear movement mechanism 73.

  Along with the above, the bent piece 71m formed at the upstream end of the paper discharge guide plate 71B is largely separated from the press roller 61, so that the air AR blown from the peeling fan 66 causes the press roller 61 and the paper discharge guide plate 71B to bend. It passes between the pieces 71m downward.

  As a result, the air AR blown from the peeling fan 66 does not stay above the paper discharge guide plate 71B, so that the air AR from the peeling fan 66 is close to the plate cylinder 51 and the printed paper near the paper peeling point HP. The leading edge Pa of the sheet P can be efficiently separated from the plate cylinder 51 by the peeling claw 68 because the leading edge Pa of the sheet P can be efficiently inserted into the gap.

  Next, as shown in FIG. 6B, immediately after the leading end portion Pa of the printed sheet P reaches the sheet peeling point HP and is peeled off from the plate cylinder 51, a command from the control unit 95 (FIG. 1) is issued. To move the paper discharge guide plate 71B upstream (in the direction of the arrow X2) along the paper transport guide member 81B via the linear movement mechanism 73.

  Along with the above, the bent piece 71m side of the paper ejection guide plate 71B approaches the press roller 61 and returns to the same state as during normal printing. As a result, the printed sheet P peeled off from the plate cylinder 51 is reliably transported in the sheet discharging direction along the upper surface 71u of the sheet discharging guide plate 71B.

  According to the ventilation means 70B (70) of the second embodiment configured as described above, before the leading end Pa of the printed sheet P reaches the sheet peeling point HP, the sheet conveyance direction of the sheet ejection guide plate 71B. Is moved linearly so that the upstream end side of the sheet is largely separated from the press roller 61, and the air AR blown from the peeling fan 66 passes below the sheet discharge guide plate 71B. Air AR does not stay above the space.

  On the other hand, when the leading end Pa of the printed paper P reaches the paper peeling point HP, the upstream end side of the paper discharge guide plate 71B in the paper transport direction is returned to the original position.

  As a result, the leading end Pa of the printed sheet P is separated from the plate cylinder 51 side near the sheet peeling point HP by the air AR blown from the peeling fan 66, and thereafter, the leading end of the sheet P is moved by the peeling claw 68. Pa can be surely peeled off, which can contribute to improvement in the reliability of the stencil printing apparatus 10 (FIG. 1).

  Further, after the leading end portion Pa of the printed paper P is separated from the plate cylinder 51 side, the paper ejection guide plate 71B returns to the original position at the time of normal printing, so that the printed paper P is transferred to the paper ejection guide plate 71B. Along the paper discharge direction.

(Ventilation means of the third embodiment)
FIG. 7 is an enlarged view of a printing section, a paper peeling section, a ventilation means of the third embodiment provided on a paper discharge guide plate, and a paper transport guide member provided in the paper discharge section in the stencil printing apparatus according to the present invention. I have. In FIG. 7, the stencil sheet wound around the outer peripheral surface of the plate cylinder is not shown for convenience of illustration.

  In the ventilation means 70C (70) of the third embodiment shown in FIG. 7, a sheet set to separate the leading end Pa of the printed sheet P from the plate cylinder 51 side by the air AR blown from the separation fan 66. The paper peeling point measuring means 48, 95 (FIG. 1) for measuring the peeling point HP is effectively functioning. In addition, upstream of the discharge guide plate 71C movably provided so that the air AR blown from the separation fan 66 of the sheet separation unit 65 does not stay above the discharge guide plate 71C (71) in the third embodiment. A measure is taken to rotate the end side so as to be largely separated from the press roller 61 to release the air AR.

  That is, as shown in FIG. 7, in the ventilation means 70C (70) of the third embodiment, the paper ejection guide plate 71C for guiding the printed paper P printed by the printing unit 50 in the paper ejection direction is provided by the press roller 61. Is movably installed downstream.

  The above-mentioned paper ejection guide plate 71C has its upstream end close to the press roller 61, and has its downstream end fixed to a rotation shaft 75 and supported rotatably.

  The paper ejection guide plate 71C is short in the sheet conveyance direction and is slightly longer in the sheet width direction than the width of the sheet P having the maximum size, and the upper surface 71u is formed in a flat plate shape.

  Since a bent piece 71m is slightly bent downward at the upstream end of the paper discharge guide plate 71C, the bent piece 71m provides rigidity to the flat upper surface 71u.

  Then, at the initial stage when the ventilation means 70C of the third embodiment is not operating or during normal printing during paper printing, the bent piece 71m of the paper ejection guide plate 71C approaches the press roller 61 with a slight gap. ing. For this reason, at the initial stage or during normal printing, the air AR blown from the peeling fan 66 easily stays above the discharge guide plate 71C.

  Further, the downstream end side of the paper ejection guide plate 71C is close to the upstream end of the paper conveyance guide member 81C (83) in the third embodiment, but is separated from the paper conveyance guide member 81C, and the back surface thereof. Since the rotating shaft 75 is attached to the side, the upper surface 71u remains a flat surface, and a plurality of ventilation holes as described in the first embodiment are not formed.

  Along with the above, the sheet conveying guide member 81C does not have a pair of inclined pieces formed at the upstream end as described in the first embodiment, but the other portions are formed similarly to the first embodiment. .

  The paper discharge guide plate 71C is provided so as to be rotatable in the directions of arrows R1 and R2 around the rotation shaft 75 by converting the rotation of the motor 76 into rotation while decelerating by the rotation mechanism 77. Have been.

  Here, the operation of the ventilation means 70C (70) of the third embodiment will be described with reference to FIGS. 8 (a) and 8 (b).

  FIG. 8 shows the operation of the ventilation means of the third embodiment provided on the paper ejection guide plate shown in FIG. 7, and FIG. 8 (a) shows a state in which the upstream end side of the paper ejection guide plate is largely separated from the press roller. (B) shows a state in which the upstream end side of the discharge guide plate approaches the press roller. 8A and 8B, the stencil sheet wound around the outer peripheral surface of the plate cylinder is not shown.

  First, when the paper ejection guide plate 71C is in the state of normal printing shown in FIG. 7, the leading end Pa of the printed paper P moves between the lower part of the outer peripheral surface 51a of the plate cylinder 51 and the press roller 61. pass.

  At this time, as shown in FIG. 8A, before the leading end Pa of the printed paper P reaches the paper peeling point HP measured by the paper peeling point measuring means 48, 95 (FIG. 1), the control unit In response to a command 95 (FIG. 1), the motor 76 is rotated forward to rotate the discharge guide plate 71C downward (in the direction of the arrow R1) about the rotation shaft 75 via the rotation mechanism 77.

  Along with the above, the bent piece 71m formed at the upstream end of the paper ejection guide plate 71C is largely separated from the press roller 61, so that the air AR blown from the peeling fan 66 causes the press roller 61 and the paper ejection guide plate 71C to bend. It passes between the pieces 71m downward.

  As a result, the air AR blown from the peeling fan 66 does not stay above the paper discharge guide plate 71C, so that the air AR from the peeling fan 66 is close to the plate cylinder 51 and the printed paper near the paper peeling point HP. The leading edge Pa of the sheet P can be efficiently separated from the plate cylinder 51 by the peeling claw 68 because the leading edge Pa of the sheet P can be efficiently inserted into the gap.

  Next, as shown in FIG. 8B, immediately after the leading end Pa of the printed paper P reaches the paper peeling point HP and is peeled off from the plate cylinder 51, the control unit 95 (FIG. 1) issues a command. To rotate the paper discharge guide plate 71C upward (in the direction of the arrow R2) about the rotation shaft 75 via the rotation mechanism 77.

  Along with the above, the bent piece 71m side of the paper ejection guide plate 71C approaches the press roller 61 and returns to the same state as during normal printing. As a result, the printed sheet P peeled from the plate cylinder 51 is reliably transported in the sheet discharging direction along the upper surface 71u of the sheet discharging guide plate 71C.

  According to the ventilation means 70C (70) of the third embodiment configured as described above, before the leading end Pa of the printed paper P reaches the paper separation point HP, the paper transport direction of the paper discharge guide plate 71C. Is rotated so that the upstream end side of the sheet is largely separated from the press roller 61, and the air AR blown from the peeling fan 66 passes below the sheet ejection guide plate 71C. Air AR does not stay above the space.

  On the other hand, when the leading end portion Pa of the printed sheet P reaches the sheet peeling point HP, the upstream end of the sheet ejection guide plate 71C in the sheet conveying direction is returned to the original position.

  As a result, the leading end Pa of the printed sheet P is separated from the plate cylinder 51 side near the sheet peeling point HP by the air AR blown from the peeling fan 66, and thereafter, the leading end of the sheet P is moved by the peeling claw 68. Pa can be surely peeled off, which can contribute to improvement in the reliability of the stencil printing apparatus 10 (FIG. 1).

  Further, after the leading end portion Pa of the printed paper P is separated from the plate cylinder 51 side, the paper ejection guide plate 71C returns to the original position at the time of normal printing, so that the printed paper P is transferred to the paper ejection guide plate 71C. Along the paper discharge direction.

10: stencil printing device, 11: device housing,
Reference numeral 15: operation panel section, 20: original reading section, 25: plate making section, 30: cam drive section,
Reference numeral 40: paper feed unit, 41: paper feed table, 44: paper feed roller, 45: separating roller,
47: registration roller pair, 48: optical sensor for detecting the leading edge of the paper,
Reference numeral 50: printing unit, 51: plate cylinder, 51a: outer peripheral surface, 52: central axis, 52a: ink insertion port,
53: plate cylinder motor, 54: encoder, 55: plate mount, 56: clamp plate,
59: Doctor roller, 60: Ink roller, 61: Press roller,
65: paper peeling section, 66: peeling fan (air knife), 67: air guide plate,
68 ... peeling nail,
70 ... ventilation means, 71 ... paper ejection guide plate, 71m ... bent piece, 71u ... upper surface,
70A ... ventilation means of the first embodiment,
71A: discharge guide plate in the first embodiment; 71h: vent hole;
70B ... ventilation means of the second embodiment,
71B: a discharge guide plate in the second embodiment, 72: a motor, 73: a linear moving mechanism,
70C ... the ventilation means of the third embodiment,
71C: discharge guide plate in the third embodiment, 75: rotating shaft, 76: motor,
77 ... Rotating mechanism,
80: paper discharge unit, 81: paper transport guide member, 81m: bent piece, 81u: upper surface,
81A: paper transport guide member in the first embodiment; 81k: inclined piece;
81B: a sheet transport guide member according to the second embodiment;
81C: paper transport guide member in the third embodiment;
82: endless belt, 83: motor, 84: drive pulley, 85: driven pulley,
86: air suction fan, 87: paper discharge tray,
82: endless belt, 90: plate discharge section, 95: control section, 95a: CPU,
95b ROM, 95c RAM, 95d timer
48, 95: paper peeling point measuring means,
AR: air, HP: paper peeling point, IK: ink, M: stencil sheet (master),
P: paper, Pa: leading end in the paper transport direction.

Claims (5)

A stencil sheet on which a perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and an ink image corresponding to the perforated image on a sheet of paper with ink oozing from the outer peripheral surface of the plate cylinder. A printing unit for printing the
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate ,
The ventilation means forms a plurality of ventilation holes in the paper ejection guide plate for passing the air blown from the peeling fan toward a lower side of the paper ejection guide plate. A stencil printing machine characterized in that an inclined piece that is inclined obliquely downward is overlapped with an upstream end of a sheet conveyance guide member provided in the sheet discharge conveyance means in the sheet conveyance direction below . A stencil sheet on which a perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and an ink image corresponding to the perforated image on a sheet of paper with ink oozing from the outer peripheral surface of the plate cylinder. A printing unit for printing the
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate,
Further provided is a paper peeling point measuring means for measuring a paper peeling point set for peeling the leading end of the printed paper from the plate cylinder side by the air blown from the peeling fan,
The ventilation unit is configured to movably install the paper ejection guide plate on the downstream side of the printing unit in the paper conveyance direction, and the leading end of the printed paper is measured by the paper peeling point measurement unit. When reaching the peeling point, the discharge guide plate is so arranged that the air blown from the peeling fan passes below the discharge guide plate until the leading end of the printed sheet is peeled. While moving the upstream end in the paper transport direction, when the leading end of the printed paper reaches the paper peeling point, the upstream end of the paper discharge guide plate in the paper transport direction is returned to the original position. thing
A stencil printing apparatus characterized by the above-mentioned . A stencil sheet on which a perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and an ink image corresponding to the perforated image on a sheet of paper with ink oozing from the outer peripheral surface of the plate cylinder. A printing unit for printing the
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A paper discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper peeled by the peeling fan in a paper discharge direction.
A paper discharge transport unit that is installed downstream of the paper discharge guide plate in the paper transport direction, and that transports the printed sheet that has been peeled off by the peeling fan and passed through the paper discharge guide plate toward a paper discharge table. And at least,
The discharge guide plate has a ventilation hole formed so that the air blown from the peeling fan does not stay above the discharge guide plate.
A stencil printing apparatus characterized by the above-mentioned . The ventilation hole is a hole formed as a closed curve in the paper discharge guide plate, and allows the air blown from the peeling fan to pass downward of the paper discharge guide plate.
The stencil printing apparatus according to claim 3, wherein: A stencil sheet on which a perforated image is formed is wound around the outer peripheral surface of a rotatable cylindrical plate cylinder, and an ink image corresponding to the perforated image on a sheet of paper with ink oozing from the outer peripheral surface of the plate cylinder. A printing unit for printing the
A peeling fan that peels off the leading end of the printed sheet printed by the printing unit from the plate cylinder side by air,
A peeling claw for peeling the printed sheet from the plate cylinder,
A discharge guide plate that is installed downstream of the printing unit in the paper transport direction and guides the printed paper separated by the separation fan and the separation claw in a discharge direction;
The printed paper is disposed downstream of the paper ejection guide plate in the paper conveyance direction, and the printed paper that has been peeled off by the peeling fan and the peeling claw and passed through the paper ejection guide plate is conveyed toward a paper ejection table. And a paper discharge conveying means,
The paper discharge guide plate is provided with a ventilation means so that the air blown from the peeling fan does not stay above the paper discharge guide plate,
The ventilation means may have a plurality of ventilation holes formed in the paper ejection guide plate to allow the air blown from the peeling fan to pass downwardly of the paper ejection guide plate.
A stencil printing apparatus characterized by the above-mentioned.

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