JP2016047637A - Stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically separate a sheet stuck to a plate cylinder side.SOLUTION: A stencil printer 1 which prints on paper P an ink image corresponding to a perforated image portion of stencil paper M wound around an outer peripheral surface 61a of a cylindrical plate cylinder 61 and separates the printed paper P from the plate cylinder 61 side with a separation claw 75 installed near the outer peripheral surface 61a of the plate cylinder 61 to discharge the paper P comprises: detection means 71 which detects the paper P stuck to the plate cylinder side when the plate cylinder 61 continues to rotate while the printed paper P is stuck to the plate cylinder 61 without being separated from the plate cylinder 61 side; a stuck paper separation mechanism part 90 which is installed in accordance with the inlet side of a paper discharge part 100 in the state of being movable between the stand-by position apart from the outer peripheral surface 61a of the plate cylinder 61 and the separation position near the outer peripheral surface 61a of the plate cylinder 61 and automatically separates the paper P stuck to the plate cylinder 61 side; and a control part 110 which controls the entire device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stencil printing apparatus that prints an ink image on a sheet through a stencil sheet wound around an outer peripheral surface of a cylindrical plate cylinder.

  In general, a stencil printing machine clamps a stencil sheet that has been made by a clamp plate provided on a part of the outer peripheral surface of a rotatable cylindrical plate cylinder (drum), and this stencil sheet is then attached to the outer periphery of the plate cylinder. It is wound along the surface.

  Then, the paper fed from the paper feed section is pressed against the stencil sheet side by a press roller provided so as to be able to come in contact with and separated from the stencil sheet, and passes through the perforated image portion formed on the stencil sheet while the ink supplied into the stencil sheet is pressed. Then, an ink image corresponding to the perforated image portion of the stencil sheet is printed on the paper, and then the printed paper is peeled off from the plate cylinder side by a peeling claw installed close to the plate cylinder. Since a large number of the same ink images can be printed with one stencil sheet, it is frequently used.

  In the stencil printing apparatus described above, there is a solid part that requires a large amount of ink on the front side of the printing surface of the paper that is peeled off first from the plate cylinder side, or the margin that appears on the paper (Distance between the leading edge of the sheet and the leading edge of the image in the sheet conveyance direction) may be too small.

  At this time, due to the solid portion or small margin, the printed paper cannot be peeled off from the plate cylinder side with the peeling claw, and the paper remains stuck to the plate cylinder via the stencil sheet. Since the plate cylinder continues to rotate, the paper stuck to the plate cylinder side becomes jammed paper and cannot be discharged to the paper discharge unit.

  In this case, there is a method in which the plate cylinder is pulled out of the apparatus casing to the outside of the apparatus casing and the paper (jam paper) stuck to the plate cylinder side is removed, but in order to remove the jammed paper by pulling out the plate cylinder. Significant man-hours are required.

  On the other hand, there is a stencil printing apparatus that can remove jammed paper without pulling out the plate cylinder from the inside of the apparatus casing to the outside of the apparatus casing when the sheet adheres to the plate cylinder side (see, for example, Patent Document 1).

  In the stencil printing apparatus disclosed in Patent Document 1 described above, although not shown here, a plate discharging frame body and a plate discharging lid of the plate discharging unit are provided to be openable and closable above the paper discharge unit. The plate opening is opened when opened. Further, a roll-up detection sensor for detecting that the paper stuck on the plate cylinder side is rolled up is provided in the vicinity of the drum (plate cylinder) on the paper discharge unit side.

  When the ink image is printed on the paper by the perforated image portion of the stencil sheet wound around the drum (plate cylinder) using the above-described conventional stencil printing apparatus, and the printed paper is discharged to the paper discharge unit For example, if a large amount of ink adheres to the leading edge of the printed paper, the leading edge of the printed paper cannot be peeled off from the drum side with the peeling claw, and this paper sticks to the drum side and Roll up.

  When the paper that has been stuck and rolled up on the drum side is detected by the roll-up detection sensor, the plate release frame and the plate release lid of the plate release unit are opened, and the drum stop position is corrected and rotated from the normal standby position. Then, the jammed paper stuck and wound on the drum side is manually removed from the plate discharge opening.

JP 2006-321076 A

  By the way, in the stencil printing apparatus described in Patent Document 1, as described above, it is not necessary to pull out the drum from the inside of the apparatus housing when removing the jammed paper stuck to the drum (plate cylinder) side and rolled up. Man-hours for removing jammed paper can be reduced.

  However, the drum stopping position is corrected and rotated from the normal standby position, and the leading edge of the stencil sheet and the leading edge of the printed sheet are removed manually by the leading edge of the stencil sheet. Problems such as dirty hands and dirty clothes occur.

  Therefore, when the ink image corresponding to the perforated image portion of the stencil sheet wound around the outer peripheral surface of the cylindrical plate cylinder is printed on the paper, the leading end of the printed paper P is peeled off from the outer peripheral surface of the plate cylinder. An object of the present invention is to provide a stencil printing apparatus that can automatically peel off the paper stuck on the plate cylinder side from the plate cylinder side when jammed paper is stuck on the plate cylinder side without being peeled off by the nail. .

The present invention has been made in view of the above problems, and the first invention includes a paper feeding unit that feeds paper one by one,
A printing unit that prints an ink image corresponding to a perforated image portion of a stencil sheet wound around an outer peripheral surface of a cylindrical plate cylinder on a sheet sent from the paper feeding unit;
A stencil discharging unit for discharging the stencil sheet used in the printing unit from the plate cylinder;
In a stencil printing apparatus comprising at least a control unit for controlling the entire apparatus,
Detecting means for detecting the paper stuck on the plate cylinder side when the printing cylinder continues to rotate while the paper printed by the printing unit cannot be peeled off from the plate cylinder side; and
In a state where it is movable between a standby position separated from the outer peripheral surface of the plate cylinder and a peeling position close to the outer peripheral surface of the plate cylinder, it is installed corresponding to the entrance side of the plate discharging portion. A sticking paper peeling mechanism that peels off the paper sticking to the plate cylinder side,
The control unit moves the sticking paper peeling mechanism to the peeling position when the detecting unit detects the paper sticking to the plate cylinder side, and the sticking paper peeling mechanism is used to move the plate. In the stencil printing apparatus, the paper attached to the cylinder side is controlled to be peeled off from the plate cylinder side and conveyed toward the plate discharging unit.

The second invention is the stencil printing apparatus of the first invention described above,
The sticking paper peeling mechanism part is
When the sheet is moved to the peeling position, the pressing position that presses the leading end against the outer peripheral surface of the plate cylinder, and the paper that has been peeled from the plate cylinder side at a slight distance from the outer peripheral surface of the plate cylinder are discharged. A paper guide member that rotates between a guide position that guides toward the section,
A paper guide belt, which is rotatably provided at a distance from the paper guide member and guides the paper peeled from the plate cylinder side toward the discharge portion, is mounted on the movable body. A stencil printing apparatus.

The third invention is the stencil printing apparatus of the first or second invention described above,
The stencil printing apparatus is characterized in that the paper peeled from the plate cylinder side is stored in a stencil box provided in the evacuating part so as to be drawn out of the apparatus.

  According to the stencil printing apparatus of the first aspect of the invention, the sheet cylinder printed by the printing unit in the apparatus cannot be peeled off from the plate cylinder side and is stuck on the plate cylinder side by the detection means while continuing to rotate. When the attached paper is detected, the sticking paper peeling mechanism is moved to the peeling position, and the sticking paper peeling mechanism is used to peel the paper stuck on the plate cylinder side from the plate cylinder to the discharge part. Are being transported. As a result, since the paper stuck to the plate cylinder side can be peeled off from the plate cylinder side without touching it manually, the ink adhering to the paper does not contaminate human hands and clothes. Can be provided.

  Further, according to the stencil printing apparatus of the second invention, the sticking paper peeling mechanism portion has the paper guide member and the paper guide belt attached on the moving body, so the sticking paper peeling mechanism portion via the moving body. When the paper is moved to the peeling position, even if the leading edge of the paper peeled off from the plate cylinder side is curled, the paper can be reliably conveyed toward the plate discharging portion by the paper guide member and the paper guide belt. Further, it is possible to easily remove jammed paper generated on the plate cylinder side.

  Further, according to the stencil printing apparatus of the third invention, the paper peeled off from the plate cylinder side is stored in a discharge plate box that can be pulled out of the device in the discharge plate portion. The jam box stored in the waste box can be disposed of in the waste box without touching it.

1 is an overall configuration diagram illustrating an overall configuration of a stencil printing apparatus according to an embodiment of the present invention. It is a figure showing operation which detects that the paper printed in the stencil printing machine concerning the embodiment of the present invention stuck on the plate cylinder side. 6 is a timing chart illustrating a stop operation after detecting a paper discharge jam and a discharge operation of the attached paper when a paper printed in the stencil printing apparatus according to the embodiment of the invention is attached to the plate cylinder side. . It is a figure showing the 1st operation when peeling the paper stuck on the plate cylinder side. It is the figure which showed the 2nd operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 3rd operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 4th operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 5th operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 6th operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 7th operation | movement when peeling the paper affixed on the plate cylinder side. It is the figure which showed the 8th operation | movement when peeling the paper affixed on the plate cylinder side.

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

[Embodiment]
FIG. 1 shows the overall configuration of a stencil printing apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, in the stencil printing apparatus 1 according to the present invention, an apparatus housing 2 that forms the appearance of the apparatus 1 is formed in a box shape.

  The stencil printing apparatus 1 described above includes an operation panel unit 10 for operating the apparatus 1, a document reading unit 20 for reading a document on which images and characters are described, and a stencil sheet based on the document read by the document reading unit 20. Cam drive for opening and closing a plate making unit 30 for making a plate M (also referred to as a master) and a clamp plate 68 and a flip-up plate 69 attached to a part of an outer peripheral surface 61a of a plate cylinder 61 in a printing unit 60 to be described later. The stencil sheet M is wound around the outer peripheral surface 61a of the rotatable plate cylinder 61, and the unprinted paper P is printed by stencil printing. The printing unit 60, the paper discharge unit 80 for discharging the printed paper P, the sticking paper peeling mechanism 90 for automatically peeling the paper P attached to the plate cylinder 61 side, and the used stencil sheet M The plate cylinder 61 side A stencil discharge section 100 for accommodating the stripped sticking paper P, is schematically constituted by a control unit 110 for generally controlling the apparatus 1.

  Here, each part in the stencil printing apparatus 1 will be specifically described in order.

  First, the operation panel unit 10 is installed on the left side (or the front surface) of the upper surface 2 a of the apparatus housing 2. The operation panel unit 10 operates each unit by operating various function buttons (not shown), and displays an alarm when a jammed paper or the like is generated in the apparatus housing 2. ing.

  Next, the document reading unit 20 is installed on the right side of the upper surface 2 a of the apparatus housing 2. The original reading unit 20 reads an original on which images and characters are described by a CCD image sensor, although detailed illustration is omitted here.

  Next, the plate making unit 30 is installed at an upper right portion in the apparatus housing 2. In the plate making unit 30, although detailed illustration is omitted here, a plate making image is thermally perforated on a belt-like stencil sheet by a thermal head based on image information read from the document by the document reading unit 20.

  Then, the stencil sheet having been subjected to thermal perforation is cut by a cutter into a size corresponding to, for example, A3 size (420 mm × 297 mm) paper P, which is the maximum size, and the stencil sheet M for one plate is made, and then the stencil after the plate is made The base paper M is conveyed toward the plate cylinder 61 in the printing unit 60.

  Next, although detailed illustration is omitted here, the cam drive unit 40 is installed close to the upper portion of the plate cylinder 61 in the printing unit 60 and the plate making unit 30, and the stencil sheet M is transferred to the plate cylinder 61. The first cam for opening the clamp plate 68 attached to a part of the outer peripheral surface 61 a of the plate cylinder 61 when the plate cylinder 61 is put on the plate cylinder 61 and the plate cylinder 61 when the used stencil sheet M is discharged from the plate cylinder 61. And a second cam for opening the flip-up plate 69 attached to a part of the outer peripheral surface 61a.

  Next, the paper feed unit 50 is installed on the left side surface 2 b side of the apparatus housing 2. Although not shown in detail in the paper feeding unit 50, a plurality of sheets are stacked on the paper feeding tray in an unprinted state. Of the plurality of sheets P stacked on the sheet feed tray, the uppermost sheet P is pressed against the uppermost sheet P while being rotated, and the sheet P is placed below the plate cylinder 61 provided in the printing unit 60. The paper is being fed toward.

  Next, the printing unit 60 is installed at a substantially central portion in the apparatus housing 2. In this printing unit 60, the plate cylinder 61 is formed in a cylindrical shape with an outer diameter of about 180 mm corresponding to the length dimension 420 mm of the A3 size paper P, for example, and the A3 size paper P is short in the short direction. The axial direction is formed to be long corresponding to the dimension of 297 mm.

  The plate cylinder 61 is rotationally driven by the plate cylinder motor 63 around the center shaft 62 at a speed of one rotation (10 rpm) in 6 seconds in the illustrated counterclockwise direction.

  The plate cylinder motor 63 described above is a geared motor with a built-in reduction gear, and an encoder 64 is attached to a rear end shaft portion (not shown) of the plate cylinder motor 63. Pulses indicating the rotation angle when the plate cylinder 61 rotates with respect to the position are sequentially output.

  Further, a cam plate 65 is fixed to one end portion of the center shaft 62 of the plate cylinder 61, and the cam plate 65 is rotatably attached integrally with the center shaft 62. Further, a plate cylinder reference position detection piece 66 is attached on the large diameter portion 65a of the cam plate 65, and a light transmission type plate cylinder reference position having a slit facing the plate cylinder reference position detection piece 66. A detection sensor 67 is attached to a side plate (not shown) along the X axis of the XY plane indicating the side surface side of the plate cylinder 61.

  When the plate cylinder 61 rotates and the plate cylinder reference position detection piece 66 on the cam plate 65 is detected by the plate cylinder reference position detection sensor 67, one rotation pulse is output, and the plate cylinder 61 is moved to the initial position and It reaches the plate cylinder reference position which becomes the standby position.

  The above-mentioned plate cylinder reference position is set so that the rotation angle of the plate cylinder 61 is 0 °, and an operator attaches the plate cylinder 61 at the time of assembling and during the maintenance, or the plate cylinder 61 It is a position where can be removed.

  A clamp plate 68 and a flip-up plate 69 are attached to a part of the outer peripheral surface 61a of the plate cylinder 61 so as to be opened and closed.

  At this time, when the plate cylinder 61 rotates counterclockwise from the plate cylinder reference position, the clamp plate 68 attached to a part of the outer peripheral surface 61a of the plate cylinder 61 so as to be opened and closed reaches the upper plate position. Then, the clamp plate 68 is opened, and the stencil sheet M that has been subjected to the plate making sent from the plate making unit 30 is clamped. Then, after the stencil sheet M is clamped by the clamp plate 68, when the plate cylinder 61 is further rotated counterclockwise, the stencil sheet M is wound along the outer peripheral surface 61a of the plate cylinder 61. Yes.

  On the other hand, the flip-up plate 69 discharges the used stencil sheet M, which has been clamped by the clamp plate 68, when printing on the plurality of sheets P is completed and the stencil sheet M has been used. It has a function of jumping up toward 100.

  Further, a reflecting plate 70 is attached between the clamp plate 68 and the flip-up plate 69 on a part of the outer peripheral surface 61 a of the plate cylinder 61 and the plate cylinder reference position on the X-ray of the outer peripheral surface 61 a of the plate cylinder 61. A light-reflective stencil sheet detecting / sheet leading edge detecting sensor 71 is attached to a bracket (not shown) so as to face the reflecting plate 70.

  At this time, if the stencil sheet M is not wound around the outer peripheral surface 61a of the plate cylinder 61, the stencil sheet detection / sheet leading edge detection sensor 71 detects the absence of the stencil sheet by the return light of the reflecting plate 70, and the stencil sheet M If it is wound around the outer peripheral surface 61 a of the plate cylinder 61, the presence of stencil paper is detected because there is no return light from the reflecting plate 70.

  Further, the stencil sheet detection / sheet leading edge detection sensor 71 detects whether or not the sheet P is stuck to the outer peripheral surface 61a of the plate cylinder 61 via the stencil sheet M, as will be described later.

  A doctor roller 72 and an ink roller 73 are rotatably provided below the plate cylinder 61 while being in contact with each other. Ink IK supplied from the center shaft 62 of the plate cylinder 61 is accumulated between the doctor roller 72 and the ink roller 73, and the ink IK passes through the gap between the doctor roller 72 and the ink roller 73 to form the ink roller. The stencil sheet M wound around the outer peripheral surface 61 a of the plate cylinder 61 is supplied from the outer peripheral surface of 73.

  Further, below the plate cylinder 61, a press roller 74 is supported by a swing mechanism (not shown) so as to be able to contact and separate from the outer peripheral surface 61a of the plate cylinder 61 with a predetermined pressing force.

  The press roller 74 described above is fixed to one end portion of the central shaft 62 of the plate cylinder 61 when the clamp plate 68 provided in a part of the outer peripheral surface 61 a passes downward as the plate cylinder 61 rotates. The cam plate 65 is pushed by the large-diameter portion 65 a and is separated from the outer peripheral surface 61 a of the plate cylinder 61.

  After the clamp plate 68 passes through the press roller 74, the unprinted paper P sent from the paper feed unit 50 by the press roller 74 is wound around the outer peripheral surface 61 a of the plate cylinder 61 by electromagnetic force such as a solenoid (not shown). The pierced image portion of the stencil sheet M which is pressed against the rotated stencil sheet M and is supplied into the plate cylinder 61 while conveying the sheet P toward the downstream side through the stencil sheet M and onto the sheet P. Ink images can be printed according to the conditions.

  Further, on the lower right side of the plate cylinder 61, a peeling claw 75 is installed close to the outer peripheral surface 61 a of the plate cylinder 61. The peeling claw 75 has a function of peeling the front end portion Pa in the paper transport direction from the outer peripheral surface 61 a side of the plate cylinder 61 among the paper P printed by the printing unit 60.

  At this time, since the gap between the outer peripheral surface 61a of the plate cylinder 61 and the leading end 75a of the peeling claw 75 is set to about 1 mm, a large amount of ink IK is applied to the leading end Pa of the printed paper P. If attached, the leading end Pa of the printed paper P may pass through the gap without being peeled off by the peeling claw 75, and the present invention is directed to the paper P sticking to the plate cylinder 61 side generated at this time. Measures are taken.

  Next, the paper discharge unit 80 is installed on the right side surface 2 c side of the apparatus housing 2. In the paper discharge unit 80, although detailed illustration is omitted here, the sheet P printed by the printing unit 60 is removed from the plate cylinder 61 side by a peeling claw 75 placed close to the outer peripheral surface 61 a of the plate cylinder 61. It is peeled and discharged onto the paper output tray.

  Next, the sticking sheet peeling mechanism 90 is a part of the main part of the present embodiment, and is installed above the plate cylinder 61 so as to correspond to the entrance side of the plate discharging unit 100. The entire sticking sheet peeling mechanism 90 is provided so as to be movable between a standby position spaced from the outer peripheral surface 61 a of the plate cylinder 61 and a peeling position close to the outer peripheral surface 61 a of the plate cylinder 61.

  At this time, the above-described standby position is a position that does not cause trouble when the stencil sheet M is set or discharged, and the above-described peeling position is a position at which the paper stuck on the plate cylinder 61 side is peeled off. .

  The sticking paper peeling mechanism 90 is configured such that a paper guide member 93 that can be turned around a turning shaft 92 provided on the entrance side of the plate discharging part 100 by a turning drive source 91 and the paper guide member 93. And a paper guide belt 96 rotatably spanned between a pair of pulleys 94 and 95, and a left side of the paper guide belt 96 when viewed from the front side of the stencil printing apparatus 1, and a plate discharging portion. A triangular guide member 97 having a triangular shape with a sharp tip toward the entrance side of 100 is mounted on a movable body 98 that can be moved by a drive source (not shown).

  Then, the movable body 98 causes the constituent members 91 to 97 of the sticking paper peeling mechanism unit 90 to move integrally between the standby position and the peeling position, and the sticking paper peeling mechanism unit 90 reaches the peeling position. Sometimes, it has a function of peeling the paper P attached to the drum 61 side, and the operation of the sticking paper peeling mechanism 90 will be described in detail later.

  Next, the plate removal part 100 is installed in the upper left part of the plate cylinder 61 in the apparatus housing 2, and this plate removal part 100 is also a part of the main part of this embodiment. In the plate discharging unit 100, a plate driving roller 102 that is rotationally driven by a rotation driving source (not shown) is mounted on a bracket 101 that is fixedly installed on the side facing the sticking paper peeling mechanism unit 90.

  Also, below the bracket 101, a plate discharge box 105 having a plate discharge driven roller 103 that can come in contact with and separate from the plate drive roller 102 at the entrance can be pulled out from the left side 2 b side of the device housing 2 to the outside of the device housing 2. Is provided. When the plate release box 105 is mounted in the apparatus housing 2, the plate release roller pair 102, 103 is configured when the plate release drive roller 102 and the plate release driven roller 103 installed on the entrance side of the plate release box 105 come into contact with each other. doing.

  Further, the upper part of the discharge box 105 is opened, and a compression plate 106 is provided above the opening part so as to be rotatable about a rotation shaft 107. The compression plate 106 has a function of compressing the used stencil sheet M and the sticking sheet P stored in the discharge plate box 105 via the discharge roller pairs 102 and 103 as necessary.

  Further, on the bracket 101, a light reflection type plate discharge sensor 104 is installed facing the exit side of the plate discharge roller pair 102 and 103.

  The removal box 105 can be attached to and detached from the apparatus 1 by the user holding the handle 105 a of the removal box 105.

  The used stencil sheet M bounced up by the bounce-up plate 69 attached to a part of the outer peripheral surface 61a of the plate cylinder 61 is stored in the evacuation plate box 105 via the evacuation roller pairs 102 and 103, and the plate. After the paper (jam paper) P attached to the cylinder 61 side is peeled off from the outer peripheral surface 61a of the plate cylinder 61 by the sticking paper peeling mechanism 90, the jammed paper is stored in the discharge box 105.

  Next, the control unit 110 is installed at an appropriate position in the apparatus housing 2. Although detailed illustration is omitted here, the control unit 110 includes a CPU that performs arithmetic processing and determination processing, a ROM that stores an operation program of the stencil printing apparatus 1, and various types that can be changed within the stencil printing apparatus 1. And a counter for counting the number of pulses output from the encoder 64 attached to the plate cylinder motor 63.

  Then, the control unit 110 includes an operation panel unit 10, a document reading unit 20, a plate making unit 30, a cam driving unit 40, a paper feeding unit 50, a printing unit 60, a paper discharge unit 80, and an adhesive sheet. The peeling mechanism unit 90 and the plate removal unit 100 are controlled.

  When the ink image corresponding to the perforated image portion of the stencil sheet M wound around the outer peripheral surface 61 a of the plate cylinder 61 is printed on the paper P using the stencil printing apparatus 1 configured as described above, As described in the background art, there is a solid portion that requires a large amount of ink on the front end portion of the printing surface of the paper P that is peeled off first from the plate cylinder 61 side, or on the paper P When the margin shown in FIG. 4 is too small, the leading end Pa of the printed paper P cannot be peeled off from the plate cylinder 61 side by the peeling claw 75, and the printed paper P may stick to the plate cylinder 61 side. is there.

  Therefore, in the present invention, when the printed paper P is attached to the plate cylinder 61 side, the case where the attached paper P is automatically peeled from the plate cylinder 61 side will be described with reference to FIGS. This will be described in detail below.

  FIGS. 2A and 2B show an operation for detecting that a sheet printed in the stencil printing apparatus according to the embodiment of the present invention is stuck to the plate cylinder side.

  First, in the state shown in FIG. 2A, when the paper P printed by the printing unit 60 is discharged to the paper discharge unit 80, the leading edge Pa of the printed paper P is separated by the peeling claw 75 with the plate cylinder 61. The plate cylinder 61 continues to rotate in a state where the printed paper P is stuck to the plate cylinder 61 side without being peeled from the outer peripheral surface 61a, and the paper P is rolled up.

  In this state, the plate cylinder reference position detection piece 66 on the cam plate 65 attached to one end portion of the center shaft 62 of the plate cylinder 61 is detected by the plate cylinder reference position detection sensor 67 and described above with reference to FIG. When the plate cylinder reference position is reached, the angle α from the plate cylinder reference position to the stencil sheet detection / sheet leading edge detection sensor 71 counts the number of pulses of the encoder 64 from the plate cylinder reference position after assembly. And get it. The angle α is converted into the measured number of pulses of the encoder 64 and stored in the RAM in the control unit 110.

  The encoder 64 attached to the rear end shaft of the plate cylinder motor 63 counts the number of pulses from the plate cylinder reference position with the plate cylinder reference position set to 0 °, and the angle per pulse is set in advance. Therefore, the rotation angle of the plate cylinder 61 can be converted into the number of pulses.

  On the other hand, when the plate cylinder 61 is rotated counterclockwise from the plate cylinder reference position and the leading edge Pa of the paper P adhered to the plate cylinder 61 is detected by the stencil sheet detection / paper leading edge detection sensor 71, If the number of pulses from the encoder 64 is counted by the counter in the control unit 110, the leading edge Pa of the sheet P on the plate cylinder 61 reaching the plate cylinder reference position moves to the position of the stencil sheet detection / sheet leading edge detection sensor 71. Is obtained, and the angle β is converted into the number of pulses from the encoder 64 and stored in the RAM in the control unit 110.

  Therefore, the angle θ from the plate cylinder reference position to the leading end portion Pa of the paper P attached to the plate cylinder 61 side is obtained by subtracting the angle β from the angle α by the CPU in the control unit 110 (θ = α−β). By storing the number of pulses of the encoder 64 corresponding to this angle θ in the RAM in the control unit 110, the plate cylinder 61 side is controlled to a sticking sheet peeling standby position described later with reference to this angle θ. it can.

  Thereafter, as shown in FIG. 2 (b), when the plate cylinder 61 is further rotated counterclockwise and rotated once to the next plate cylinder reference position, the stencil sheet detection / paper front end detecting the front end Pa of the paper P is detected. Since the detection sensor 71 continuously detects the presence of the sheet up to the rear end portion Pb of the sheet P corresponding to the length of the sheet P, the control unit 110 can determine that the sheet P is attached to the plate cylinder 61 side. .

  Therefore, the detecting means for determining whether or not the printed paper P is stuck to the plate cylinder 61 side is arranged such that the front end portion Pa of the printed paper P is located downstream of the plate cylinder reference position in the rotation direction of the plate cylinder 61. After detection by the stencil sheet detection / sheet leading edge detection sensor 71, the plate cylinder 61 is rotated once to reach the next plate cylinder reference position, and the presence of the sheet is detected. There is no need for a roll-up detection sensor.

  Here, with reference to FIG. 3 and FIGS. 4 to 11, the jam paper peeling and removing process when the paper P printed in the stencil printing apparatus 1 is attached to the plate cylinder 61 side will be described in the order of operation.

  FIGS. 3A to 3H show a stop operation after detection of a paper discharge jam and a stuck sheet when a sheet printed in the stencil printing apparatus according to the embodiment of the present invention is stuck to the plate cylinder side. 2 is a timing chart of the discharging operation. 4 to 11 show the first to eighth operations when the paper attached to the plate cylinder side is peeled off.

  In FIG. 3, the illustration step correspondence corresponds to the first to eighth operations by assigning the figure numbers of FIGS. 4 to 11 and corresponds to the first to eighth operations (1). The number of (8) is attached.

<First operation>
First, the first operation shown in FIG. 4 shows a state in which the plate cylinder 61 reaches the plate cylinder reference position when paper sticking occurs on the plate cylinder 61 side.

  In the first operation shown in FIGS. 3 and 4, an ink image is printed corresponding to the perforated image portion of the stencil sheet M wound around the outer peripheral surface 61 a of the plate cylinder 61 by the printing unit 60 in the stencil printing apparatus 1. When the printed paper P is discharged toward the paper discharge unit 80, if the leading end Pa of the paper P cannot be peeled from the outer peripheral surface 61a side of the plate cylinder 61 by the peeling claw 75, the printed paper P is stenciled. Paper sticking that sticks to the plate cylinder 61 side through the base paper M occurs.

  Along with this, in the stencil printing apparatus 1, the operation after detecting the paper discharge jam is started via the control unit 110. Note that at the stage immediately after the paper sticking occurs, printing is in progress, so the press roller 74 presses the stencil sheet M on which the paper P is wound around the plate cylinder 61.

  Then, the plate cylinder reference position detection piece 66 on the cam plate 65 attached to one end portion of the center shaft 62 of the plate cylinder 61 is detected by the plate cylinder reference position detection sensor 67, and the plate cylinder 61 is detected for the first time. It reaches the reference position.

  Here, when the plate cylinder 61 has reached the first plate cylinder reference position, the sticking sheet peeling mechanism unit 90 movably provided above the plate cylinder 61 is retracted to the standby position. Along with this, the paper guide member 93 that is rotatably provided in the sticking paper peeling mechanism unit 90 stands by while maintaining a substantially horizontal posture, and the paper guide belt 96 stops rotating (OFF). Yes.

  Further, the pair of discharging rollers 102 and 103 in the discharging unit 100 also stops rotating, and the discharging sensor 104 is also in an OFF state.

<Second operation>
Next, the second operation shown in FIG. 5 shows a state in which the sticking of the printed paper P to the plate cylinder 61 is detected.

  3 and 5, the plate cylinder 61 is rotated counterclockwise about the central axis 62 from the plate cylinder reference position, and the plate cylinder 61 is detected by the stencil sheet detection / sheet leading edge detection sensor 71. The leading end Pa of the paper P stuck to the side is detected.

  Then, as described above with reference to FIG. 2B, when the plate cylinder 61 is further rotated counterclockwise and the presence of the sheet is detected continuously by the stencil sheet detection / sheet leading edge detection sensor 71, the control unit 110 determines that the sheet P is attached to the plate cylinder 61 side.

  When the plate cylinder 61 makes one rotation toward the next plate cylinder reference position, the rear end portion Pb of the paper P is also wound around the plate cylinder 61 side.

  Even in the second operation, as in the first operation, the sticking sheet peeling mechanism 90 is retracted to the standby position, and the pair of discharge rollers 102 and 103 in the discharge unit 100 is stopped. Therefore, the plate removal sensor 104 remains in the OFF state.

<Third operation>
Next, in the third operation shown in FIG. 6, after the plate cylinder 61 is rotated once and the stencil sheet detection / paper leading edge detection sensor 71 detects paper sticking, the plate cylinder 61 is moved to the second plate cylinder reference position. It shows a state where it has stopped temporarily.

  In the third operation shown in FIGS. 3 and 6, after it is detected that the paper P printed on the plate cylinder 61 side is stuck, the plate cylinder 61 reaches the second plate cylinder reference position. Since the plate cylinder 61 is temporarily stopped at the second plate cylinder reference position, the control unit 110 starts an operation of discharging the stuck paper.

  Even in the third operation, as in the first and second operations, the sticking sheet peeling mechanism unit 90 is retracted to the standby position, and the pair of discharge rollers 102 and 103 in the discharge unit 100 is stopped. Therefore, the plate removal sensor 104 remains in the OFF state.

<Fourth operation>
Next, the fourth operation shown in FIG. 7 shows a state in which the leading end Pa of the paper P attached to the plate cylinder 61 side is rotated to the attached paper peeling standby position.

  In the fourth operation shown in FIGS. 3 and 7, in order to start the discharge operation of the paper P attached to the plate cylinder 61 side, the plate cylinder 61 temporarily stopped at the second cylinder reference position is centered. Rotating counterclockwise around the axis 62 again, the sticking sheet peeling standby position where the leading end Pa of the sheet P sticking to the plate cylinder 61 side reaches the vicinity of the Y axis, which is the upper position of the plate cylinder 61 At this point, the rotation of the plate cylinder 61 is stopped.

  At this time, as described above with reference to FIG. 2A, the number of pulses of the encoder 64 corresponding to the angle θ from the plate cylinder reference position to the leading end Pa of the paper P attached to the plate cylinder 61 side is as follows. Since it is stored in the RAM in the control unit 110, the control unit 110 calculates the number of pulses of the encoder 64 until the leading end Pa of the paper P reaches the sticking paper peeling standby position with reference to the angle θ described above. The rotation angle of the plate cylinder 61 is controlled.

  Even in the fourth operation, as in the first to third operations, the sticking sheet peeling mechanism 90 is retracted to the standby position, and the pair of discharge rollers 102 and 103 in the discharge unit 100 is stopped. Therefore, the plate removal sensor 104 remains in the OFF state.

<Fifth operation>
Next, the fifth operation shown in FIGS. 8A and 8B shows a state in which the sticking sheet peeling mechanism 90 is moved from the standby position to the peeling position.

  In the fifth operation shown in FIGS. 3 and 8A and 8B, the control unit 110 is retracted to the standby position during the period in which the plate cylinder 61 side is stopped at the sticking sheet peeling standby position. The sticking paper peeling mechanism 90 is moved to the peeling position close to the outer peripheral surface 61 a of the plate cylinder 61.

  At this time, as shown in an enlarged view in FIG. 8 (b), the paper guide member 93 in the sticking paper peeling mechanism portion 90 has the leading edge portion Pa of the paper P with the leading edge portion 93a attached to the plate cylinder 61 side. And the rear end 93b side is rotatably supported by the rotation shaft 92.

  The rotational position of the plate cylinder 61 is between the front end portion 93a of the paper guide member 93 maintained in a substantially horizontal posture without rotating and the front end portion Pa of the paper P attached to the plate cylinder 61 side. It is controlled so that a gap is generated.

  In this fifth operation, the sticking paper peeling mechanism 90 only moves to the peeling position, and both the paper guide member 93 and the paper guide belt 96 are in the non-operating state. The roller pairs 102 and 103 are stopped, and the plate ejection sensor 104 is also in the OFF state.

<Sixth operation>
Next, the sixth operation shown in FIGS. 9A to 9C shows a state in which the operations of the sticking sheet peeling mechanism unit 90 and the plate discharging unit are started.

  In the sixth operation shown in FIGS. 3 and 9A to 9C, after the sticking paper peeling mechanism 90 moves to the peeling position, the paper guide member 93 in the sticking paper peeling mechanism 90 is moved. The rotation drive source 91 is rotated clockwise about the rotation shaft 92.

  At this time, the paper guide member 93 described above is not illustrated in detail, but uses a plate material that can elastically displace the leading end 93a side without damaging the stencil sheet M or the plate cylinder 61, and the like. A front end portion 93 a of the paper guide member 93 is formed in a comb shape along the width direction of the paper P.

  On the other hand, the rotation drive source 91 transmits the rotation of the motor to the rotation shaft 92 via the reduction gear train to rotate the paper guide member 93 or press the eccentric cam against the paper guide member 93. A mechanism for rotating the paper guide member 93 is provided.

  3 and 9B, the leading end 93a of the paper guide member 93 is pressed against the outer peripheral surface 61a of the plate cylinder 61 and bent by the clockwise rotation of the paper guide member 93. To the pushing position.

  Thereafter, as shown in FIGS. 3 and 9C, the plate cylinder 61 is rotated counterclockwise by a specified angle, and the leading end portion Pa of the paper P is moved from the plate cylinder 61 side by the leading end portion 93a of the paper guide member 93. Remove automatically.

  In the sixth operation, the paper guide belt 96 is rotated in the clockwise direction through the pair of pulleys 94 and 95 in the sticking paper peeling mechanism 90.

  Further, during the sixth operation, the plate discharge roller pairs 102 and 103 in the plate discharge unit 100 are rotated in the paper discharge direction. Further, the compression plate 106 is retracted upward so as not to interfere with the entry of the sticking paper P fed into the plate discharging box 105 by the plate discharging roller pairs 102 and 103.

<Seventh operation>
Next, the seventh operation shown in FIGS. 10A and 10B shows a state in which the paper P attached to the plate cylinder 61 side is being peeled from the plate cylinder 61 side.

  In the seventh operation shown in FIG. 3 and FIGS. 10A and 10B, the paper guide member 93 reaching the pressing position is slightly counterclockwise about the rotation shaft 92 by the rotation drive source 91. , And the leading end 93a of the paper guide member 93 is moved to a guide position slightly lifted from the outer peripheral surface 61a of the plate cylinder 61, thereby accelerating the separation of the paper P.

  At this time, since the paper guide belt 96 installed above the paper guide member 93 rotates in the paper discharge direction, even if the leading end portion Pa of the paper P peeled from the plate cylinder 61 is curled upwards. Since the leading edge Pa of the curled paper P abuts against the paper guide belt 96 or the triangular guide member 97 and is guided, it can be directed to the rotating plate discharge roller pair 102 and 103.

  Then, the sheet P stuck to the plate cylinder 61 side while rotating the plate cylinder 61 counterclockwise is automatically peeled from the plate cylinder 61 side along the sheet guide member 93 moved to the guide position, and peeled off. The conveyed paper P is conveyed toward the plate discharge roller pair 102 and 103 in the plate discharge unit 100.

<Eighth operation>
Next, the eighth operation shown in FIG. 11 shows a state in which the paper P attached to the plate cylinder 61 side is automatically stored in the plate ejection box 105 of the plate ejection unit 100.

  Note that the plate discharging box 105 of the plate discharging unit 100 normally stores used stencil sheet M, but in this embodiment, it is formed to a size that can also store the paper P attached to the plate cylinder 61 side. .

  When the plate cylinder 61 continues to rotate counterclockwise during the eighth operation shown in FIGS. 3 and 11, the paper P peeled from the plate cylinder 61 side becomes the paper guide member 93, the paper guide belt 96, and the triangle. , While being guided by the guide member 97, it is sent to the rotating plate discharge roller pair 102 and 103 and stored in the plate discharge box 105.

  When the plate cylinder 61 makes one rotation from the second plate cylinder reference position and reaches the third plate cylinder reference position, the paper P is completely peeled off from the plate cylinder 61 side and completely in the discharge plate box 105. Stored.

  Thereafter, the control unit 110 stops each operation of the sticking paper peeling mechanism 90 and the plate discharging unit 100 and returns the sticking paper peeling mechanism 90 to the standby position and retracts it.

  At this time, the control unit 110 issues a jammed paper removal alarm with reference to the information on the occurrence of sticking paper by the stencil sheet detection / paper leading edge detection sensor 71 and the printing plate discharge information of the printing plate sensor 104. As a result, the user can pull out the discharge box 105 to the outside of the apparatus housing 2 and discard the jammed paper stored in the discharge box 105 into a trash box or the like without touching it manually.

  As described above in detail, according to the stencil printing apparatus 1 according to the present invention, when the control unit 110 detects the paper P attached to the plate cylinder 61 side by the detecting means 71, the attached paper peeling mechanism. The part 90 is moved to the peeling position, and the paper P attached to the plate cylinder 61 side is automatically peeled off by the sticking paper peeling mechanism part 90 and conveyed toward the plate discharging part 100. As a result, the paper P attached to the plate cylinder 61 side can be automatically peeled off from the plate cylinder 61 side without touching it, so that the ink and the clothes adhering to the paper do not contaminate the hands and clothes. A stencil printing apparatus 1 with good quality can be provided.

DESCRIPTION OF SYMBOLS 1 ... Stencil printing apparatus, 2 ... Apparatus housing, 2a ... Upper surface, 2b ... Left side surface, 2c ... Right side surface,
DESCRIPTION OF SYMBOLS 10 ... Operation panel part, 20 ... Document reading part, 30 ... Plate making part, 40 ... Cam drive part,
50: paper feed unit,
60 ... Printing section, 61 ... Plate cylinder, 61a ... Outer peripheral surface, 62 ... Central axis,
63 ... Plate cylinder motor, 64 ... Encoder, 65 ... Cam plate, 65a ... Large diameter part,
66 ... Plate cylinder reference position detection piece, 67 ... Plate cylinder reference position detection sensor,
68 ... Clamp plate, 69 ... Bounce plate,
70: Reflecting plate, 71: Detection means (stencil sheet detection / paper leading edge detection sensor),
72 ... Doctor roller, 73 ... Ink roller, 74 ... Press roller, 75 ... Peeling nail,
80: paper discharge unit,
90 ... sticking paper peeling mechanism, 91 ... rotation drive source, 92 ... rotation shaft,
93 ... paper guide member, 93a ... front end, 93b ... rear end,
94, 95 ... a pair of pulleys, 96 ... a paper guide belt, 97 ... a triangular guide member,
98 ... a moving body,
100: Discharge plate part, 101 ... Bracket,
102, 103 ... discharge roller pair, 102 ... discharge plate driving roller, 103 ... discharge plate driven roller,
104: Discharge sensor, 105 ... Discharge box, 105a ... Handle,
110 ... Control unit, IK ... Ink, MP ... Stencil paper,
P: Paper, Pa: Paper leading edge, Pa: Paper trailing edge.

Claims (3)

A paper feed unit for feeding paper one by one;
A printing unit that prints an ink image corresponding to a perforated image portion of a stencil sheet wound around an outer peripheral surface of a cylindrical plate cylinder on a sheet sent from the paper feeding unit;
A stencil discharging unit for discharging the stencil sheet used in the printing unit from the plate cylinder;
In a stencil printing apparatus comprising at least a control unit for controlling the entire apparatus,
Detecting means for detecting the paper stuck on the plate cylinder side when the printing cylinder continues to rotate while the paper printed by the printing unit cannot be peeled off from the plate cylinder side; and
In a state where it is movable between a standby position separated from the outer peripheral surface of the plate cylinder and a peeling position close to the outer peripheral surface of the plate cylinder, it is installed corresponding to the entrance side of the plate discharging portion. A sticking paper peeling mechanism that peels off the paper sticking to the plate cylinder side,
The control unit moves the sticking paper peeling mechanism to the peeling position when the detecting unit detects the paper sticking to the plate cylinder side, and the sticking paper peeling mechanism is used to move the plate. A stencil printing apparatus, wherein control is performed so that the paper adhered to the cylinder side is peeled off from the plate cylinder side and conveyed toward the plate discharging unit. The sticking paper peeling mechanism part is
When the sheet is moved to the peeling position, the pressing position that presses the leading end against the outer peripheral surface of the plate cylinder, and the paper that has been peeled from the plate cylinder side at a slight distance from the outer peripheral surface of the plate cylinder are discharged. A paper guide member that rotates between a guide position that guides toward the section,
A paper guide belt, which is rotatably provided at a distance from the paper guide member and guides the paper peeled from the plate cylinder side toward the discharge portion, is mounted on the movable body. The stencil printing apparatus according to claim 1. 3. The stencil printing apparatus according to claim 1, wherein the sheet peeled from the plate cylinder side is stored in a discharge box provided so as to be able to be pulled out of the apparatus in the discharge unit.

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