JP2006312288A - Printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simply structured and low-cost printing device which can keep a high quality level with regard to the arrangement of both side ends of discharged paper in good order through manually adjusting the movement of a paper discharging table in the paper width direction to the position of a paper supply table whose movement is adjusted in the paper width direction. <P>SOLUTION: This printing device has a means 115 for manually adjusting the movement of the paper discharge table which can manually adjust the movement of a paper discharge end fence 58 in the paper width direction Y, to the position of a paper supply tray 30 whose movement is adjusted in the paper width direction Y by a mechanism 110 for moving the paper supply table. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printing apparatus including a stencil printing apparatus and the like, and more particularly to a printing apparatus including a paper feed table and a paper discharge table that can be moved and adjusted in the paper width direction orthogonal to the paper transport direction.

  Among stencil printing apparatuses, among other printing apparatuses, printing paper (hereinafter simply referred to as “paper”) as a variety of sheet-like recording media and multi-size paper are used. On the paper feed side of the stencil printing apparatus, if you want to move and adjust the print image position in the paper width direction that is orthogonal to the paper transport direction, which is also the paper feed direction, for example, with a manual paper feed stand, By operating the manual dial provided, the platen itself is moved in the width direction of the paper, so that the platen loaded on the platen together with the paper platen, or the position of the sheet itself to be loaded will be shifted to make the plate. -Print and change the position of the printed image in the paper width direction.

  On the other hand, on the paper discharge side, in a conventional manual paper discharge stand, the paper discharge tray is fixed and fixed between the stencil printing apparatus side plates, and each of the pair of paper discharge side fences extends in the paper width direction. A mechanism that can adjust the position (for example, a well-known rack and pinion) is provided, and the paper discharge side fence is adjusted by a certain amount of adjustment on the paper feed side by an amount adjusted in the paper width direction. Adjust the position while viewing the paper width memory displayed on the table. Further, the conventional paper discharge end fence that receives the front end of the printed paper and aligns the front end of the paper can be adjusted in position only in the paper discharge direction, but cannot be adjusted in movement in the paper width direction. Hereinafter, this technique is referred to as the former technique.

On the other hand, in order to eliminate the inconvenience and inconvenience of having to rely on the intuition when manually moving the paper discharge tray, a pair of paper discharges on the paper discharge tray according to the movement of the paper feed tray in the paper width direction A technique related to a printing apparatus that can automatically move a side fence has been proposed (see, for example, Patent Document 1).
In addition, there has been proposed a technique related to a stencil printing apparatus that can easily and automatically perform image position adjustment without increasing the cost even if the center positions of the respective sheet feeding trays of the multi-stage sheet feeding apparatus are shifted ( For example, see Patent Document 2). This technique automatically moves a paper discharge stand or a pair of paper discharge side fences in the paper width direction in accordance with the center of each paper feed tray.
Further, a technology related to a stencil printing apparatus that can adjust the print image position of printing paper stored in a plurality of paper storage units in the paper width direction for each paper storage unit and that can be connected to peripheral devices. Has also been proposed (see, for example, Patent Document 3). This technology has a plate cylinder movable in the paper width direction, and a plurality of paper storage portions and paper discharge trays are respectively arranged in the stencil printing apparatus so that the center lines of the printing paper conveyance path coincide with each other. The paper side fence is configured to be movable in conjunction with each other in the paper width direction symmetrically with respect to the center line of the transport path. Hereinafter, the technique according to Patent Documents 1 to 3 is referred to as the latter technique.

JP 2002-29656 A JP 2000-127592 A JP 2000-177916 A

  However, in the former technique, when a paper sheet whose position is adjusted in the paper width direction on the paper supply side is printed and discharged, on the paper discharge side, printed paper (hereinafter referred to as “discharge”) is printed with respect to the center of the print image position. For example, if the paper ejection side fences are moved in the paper width direction in the conventional paper width memory, the paper will be ejected in the past. Either one of the paper discharge side fences that guided both sides of the paper discharge guides only one side edge of the paper discharge, and the other side edge of the paper discharge cannot be fully guided, Alignment on both sides of the paper discharge may deteriorate.

Although the latter technique can solve the problems of the former technique, the configuration becomes complicated because each discharge side fence and discharge stand are automatically moved, resulting in an increase in cost. There is.
Furthermore, no proposal has been made that can adjust the position of the paper discharge end fence in the paper width direction independently of the paper discharge stand and the paper discharge side fence. Therefore, when the paper whose position is adjusted in the paper width direction on the paper supply side is discharged, the center position of the paper discharge that collides with the paper discharge side fence is shifted, and the alignment of the front edge of the paper discharge at the time of the collision is stable. And there is a problem that the sheets are not stacked on the output tray in an orderly manner.

  Therefore, the present invention has been made in view of the above-described circumstances, and manually moves and adjusts the paper discharge table in the paper width direction according to the position of the paper supply table moved and adjusted in the paper width direction. Accordingly, it is a first object to provide a printing apparatus that can maintain the quality of the alignment of both ends of the paper discharge and that is simple in configuration and inexpensive.

In addition, the present invention provides a printing apparatus that is simple in construction and inexpensive by maintaining the quality of the leading edge of the paper discharge by manually adjusting the paper discharge end fence alone in the paper width direction. This is the second purpose.
In addition, another object of the present invention is to provide a printing apparatus that exhibits the advantages and effects described in the embodiments described later, according to the invention-specific matters (hereinafter referred to as “configuration”).

In order to solve the above-described problems and achieve the above object, the present invention is characterized by adopting the following configuration in the invention of each claim.
The invention according to claim 1 is a printing apparatus comprising: a paper feed tray that is capable of stacking paper and is movable and adjustable in a paper width direction orthogonal to the paper transport direction; and a paper discharge tray that stacks printed paper. According to the present invention, there is provided a discharge table manual movement adjusting means for manually adjusting the movement of the discharge table in the sheet width direction in accordance with the position of the sheet feeding table adjusted in the sheet width direction.

  According to a second aspect of the present invention, in the printing apparatus according to the first aspect, a paper discharge end fence that receives a leading edge of printed paper and aligns the paper is disposed on the paper discharge table, There is provided a discharge end fence manual movement adjusting means for manually adjusting the movement of the discharge end fence in the sheet width direction.

  According to a third aspect of the present invention, there is provided a paper feed tray on which paper is stacked and movable and adjustable in the paper width direction orthogonal to the paper transport direction, a paper discharge tray on which printed paper is stacked, and a front end of the printed paper. In a printing apparatus comprising a paper discharge end fence disposed on the paper discharge stand for receiving and aligning the paper, the paper discharge end fence is manually moved to adjust the paper discharge end fence in the paper width direction manually. It has the adjustment means.

  According to a fourth aspect of the present invention, there is provided the printing apparatus according to any one of the first to third aspects, wherein a paper feed base position detecting unit that detects a position of the paper feed base in the paper width direction, and the paper discharge A paper discharge table position detecting means for detecting a position in the paper width direction on the table, and an alignment state between the paper width direction position on the paper supply table and the paper width direction position on the paper discharge table can be notified. And a control means for causing the notification means to notify the alignment state based on output signals from the paper feed tray position detection means and the paper discharge tray position detection means. To do.

  According to a fifth aspect of the present invention, in the printing apparatus according to any one of the first to fourth aspects, the paper discharge direction is manually adjusted in the paper width direction so as to align side edges of printed paper. A movable paper discharge side fence is disposed.

According to the present invention, since it has a unique configuration for each claim, it is possible to solve the above-mentioned conventional problems and provide a novel printing apparatus. The main effects are as follows.
According to the present invention, the sheet discharge tray has the manual movement adjustment means for manually moving and adjusting the sheet discharge table in the sheet width direction in accordance with the position of the sheet feed table moved and adjusted in the sheet width direction. Therefore, it is possible to provide a printing apparatus that is simple in construction and inexpensive.

  According to the present invention, the sheet discharge tray has the manual movement adjustment means for manually moving and adjusting the sheet discharge table in the sheet width direction in accordance with the position of the sheet feed table moved and adjusted in the sheet width direction. It is possible to maintain the quality of the alignment of both sides of the printed paper (paper output), provide a simple and inexpensive printing device, and manually set the paper output end fence in the paper width direction. By having the paper discharge end fence manual movement adjustment means to adjust the movement, if the discharged paper is unstable due to the printed image area etc., the paper discharge end fence alone can make adjustments including fine adjustment in the paper width direction. Therefore, it is possible to stabilize the state when the printed sheet collides with the sheet discharge end fence, and to stack the printed sheet on the sheet discharge table in an orderly manner.

According to the present invention, by including the paper discharge end fence manual movement adjusting means for manually moving and adjusting the paper discharge end fence in the paper width direction, when the paper discharged due to the print image area or the like is unstable, the paper discharge end fence is discharged. Since it is possible to make adjustments including fine adjustment in the paper width direction with the end fence alone, the state when the printed paper collides with the paper discharge end fence is stabilized, and the printed paper is placed on the paper discharge tray. Can be stacked in an orderly manner (claim 3).
In addition to the effects of the above invention, in addition to the effects of the above-described invention, when a paper discharge side fence that is manually movable in the paper width direction is arranged to align the side edges of the printed paper, The paper can be set so that the paper is ejected without shifting the position of the end fence, which is normally disposed on the paper ejection side fence and the paper ejection stand, with respect to the position. The positions of the paper discharge side fence and the paper discharge end fence coincide with each other, and the quality of the paper discharge alignment can be maintained (claims 3 and 5).
According to the present invention, the control means performs notifying means on the basis of the output signals from the paper feed tray position detection means and the paper discharge tray position detection means, and the position in the paper width direction on the paper feed tray and the paper discharge. By notifying the alignment state with the position in the sheet width direction on the table, in addition to the effects of the above-described inventions, it is possible to eliminate an erroneous setting due to the movement adjustment of the position of the sheet discharge table with respect to the sheet supply table. ).
According to the present invention, in addition to the effects of the above inventions, in addition to the effects of the above-described inventions, when a paper discharge side fence that can be manually moved in the paper width direction is arranged to align the side edges of printed paper. It can be set so that paper is discharged without shifting the position of the end fence that is normally placed on the paper discharge side fence and paper discharge stand with respect to the discharged paper discharge position, thus maintaining the quality of paper discharge alignment. (Claim 5).

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention (hereinafter referred to as “embodiments”) including the best mode for carrying out the invention and examples will be described below with reference to the drawings. In the embodiments and the like, components (members and components) having the same function and shape are described once, and the description thereof is omitted by giving the same reference numerals. In the figure, components that are configured in a pair and do not need to be specifically distinguished and described are described by appropriately describing one of them for the sake of simplification of description. In order to simplify the drawings and the description, even if the components are to be represented in the drawings, the components that do not need to be specifically described in the drawings may be omitted as appropriate. When quoting and explaining constituent elements such as published patent gazettes, the reference numerals are shown in parentheses to distinguish them from those of the embodiments.

(First embodiment)
First, an overall configuration of a stencil printing apparatus 1 as an example of a printing apparatus showing a first embodiment of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 </ b> A denotes a printing apparatus main body that forms the framework of the stencil printing apparatus 1. As shown in the figure, the stencil printing apparatus 1 includes a printing unit 2 disposed in the center of the printing apparatus main body 1A, a plate making unit 3 disposed on the upper right side of the printing unit 2, and the plate making unit 3 The sheet feeding unit 4 disposed below, the plate discharging unit 5 disposed on the upper left side of the printing unit 2, the paper discharge unit 6 disposed below the plate discharging unit 5, and the printing apparatus main body 1A are disposed above. The image reading unit 7 is provided.

The printing unit 2 includes a plate cylinder 8 that winds a plate-making master 26 around an outer peripheral surface, an ink supply unit 9 that supplies ink to the plate-making master 26 on the plate cylinder 8, and a plate-making master on the plate cylinder 8. A sheet of paper fed from the sheet feeding unit 4 has a pressure roller 10 as pressing means or pressing means for pressing printing paper (hereinafter simply referred to as “paper”) as a sheet-like recording medium to the master 26. It has a function and configuration as printing means for printing on P.
The plate cylinder 8 is configured by winding a porous support plate 8a around the outer peripheral surfaces of a pair of flanges (not shown) rotatably supported by a support shaft 11 also serving as an ink supply pipe. 1 is rotated in the direction of arrow A in FIG. The support shaft 11 is configured such that the front end portion in the drawing is supported by the side plate of the printing apparatus main body 1A, and supplies ink to the ink reservoir 15a on the surface of the portion located inside the plate cylinder 8. A plurality of small holes are drilled.

  The flanges (not shown) are rotatably supported on the support shaft 11 via bearings (not shown). The porous support plate 8a is formed of a stainless steel thin plate or the like, and has an opening portion and a non-opening portion in which a large number of ink-permeable holes are formed. The porous support plate 8a is formed in such a length that the length in the circumferential direction of the opening can be printed corresponding to the longer dimension of the A3 size paper. A stage portion 12 having a plane parallel to one generatrix of the plate cylinder 8 is disposed in the non-opening portion of the porous support plate 8a, and an open / close state that locks the front end of the master 26 on the upper surface of the stage portion 12. A free clamper 13 is arranged. When the plate cylinder 8 occupies a predetermined rotational position, the clamper 13 is opened and closed by an opening / closing means (not shown) disposed on the printing apparatus main body 1A side. On the outside of the porous support plate 8a, a mesh screen (not shown) made of polyester or stainless steel fine wire is wound about 1 to 3 layers.

  An ink supply unit 9 is disposed inside the plate cylinder 8. The ink supply means 9 is in contact with the inner peripheral surface of the porous support plate 8a, which is the inner peripheral surface of the plate cylinder 8, and an ink roller 14 extending in the direction of the support shaft 11, and the direction of the support shaft 11 substantially parallel thereto. And a doctor roller 15 that forms an ink reservoir 15 a having a wedge-shaped cross section between the ink roller 14 and the ink roller 14. The ink roller 14 is rotatably supported between a pair of side plates (not shown) fixed on a support shaft 11 between the flanges (not shown) of the plate cylinder 8. The rotational force from the driving means is transmitted through the rotational force transmitting means such as a gear or a belt and rotates in the same direction as the plate cylinder 8. The doctor roller 15 is rotatably supported between the side plates so as to maintain a position where a slight gap is generated between the outer peripheral surface of the doctor roller 15 and the outer peripheral surface of the ink roller 14. Is transmitted through a rotational force transmitting means (not shown), and rotates in a direction opposite to that of the ink roller 14. In the vicinity of the ink roller 14 and the doctor roller 15, an ink reservoir 15 a is formed by the ink supplied from the hole (not shown) of the support shaft 11.

  A press roller 10 is disposed below the plate cylinder 8 so as to face the ink roller 14. The press roller 10 is rotatably supported between a pair of press roller arms (not shown), and a printing position where the press roller 10 is pressed against the outer peripheral surface of the plate cylinder 8 by a contact / separation means (not shown) including the press roller arms. It is supported so as to be swingable between a non-printing position and a position away from the position. Further, in the vicinity of the contact / separation means (not shown), a locking means (not shown) for holding the press roller 10 in a state of being separated from the outer peripheral surface of the plate cylinder 8 is arranged.

The plate making unit 3 includes a master storage unit 20, a platen roller 21, a thermal head 22, a cutting unit 23, a master transport roller pair 24, 25, and the like. The master storage means 20 supports a core portion 27a of a master roll 27 in which a master 26 obtained by bonding a thermoplastic resin film and a porous support in a roll shape is rotatably and detachably supported.
A platen roller 21 and a thermal head 22 are arranged downstream of the master storage unit 20 in the master transport direction. The platen roller 21 is rotatably supported by a plate making side plate (not shown) of the printing apparatus main body 1A, and is rotated by a stepping motor (not shown) via a rotational force transmitting means such as a gear or a belt.
The thermal head 22 has a large number of heat generating elements and is swingably attached to and supported by the plate-making side plate (not shown). The thermal head 22 is in pressure-contact with the platen roller 21 by a biasing force of a biasing means such as a spring (not shown). It is energized. The thermal head 22 selectively heats each heating element while making contact with the thermoplastic resin film surface of the master 26, and performs hot melt perforation plate-making on the master 26.

Cutting means 23 for cutting the master 26 into a predetermined length is disposed downstream of the platen roller 21 and the thermal head 22 in the master conveyance direction. The cutting means 23 includes, for example, a fixed blade 23a and a movable blade 23b, and has a known configuration in which the movable blade 23b rotates with respect to the fixed blade 23a fixed to the plate making side plate (not shown).
On the downstream side of the cutting means 23 in the master conveyance direction, master conveyance roller pairs 24 and 25 and a guide plate 28 are arranged. The master transport roller pair 24, 25 is in pressure contact with each of the driving rollers 24a, 25a, which are synchronously driven by a driving means (not shown) such as a stepping motor, and with each of the driving rollers 24a, 25a by a biasing means (not shown). It consists of driven rollers 24b and 25b. Between the master transport roller pair 24 and the master transport roller pair 25, a flexure box 29 for storing the master-making master 26 is disposed.
The guide plate 28 is fixed to the plate making side plate, and the direction of the master 26 conveyed by each of the master conveying roller pairs 24 and 25 is changed downward to guide the front end of the master 26 to the outer peripheral surface of the plate cylinder 8. .

The paper feed unit 4 includes a paper feed tray 30, a paper feed roller 31, a separation roller 32, a separation pad 33, a registration roller pair 34, and the like.
The paper feed tray 30 is in a paper transport direction X with respect to a paper feed tray support bracket 38 fixed to the inside of a pair of paper feed side plates (not shown) forming a housing fixed to the printing apparatus main body 1A. It is attached and supported so as to be movable in the paper width direction perpendicular to the axis. That is, the paper feed tray 30 of the present embodiment has a function as a paper feed tray on which the paper P is stacked and configured to be movable and adjustable in the paper width direction by the configuration described later.
The paper feed tray 30 is provided with a pair of paper feed side fences 36 that are movable in the paper width direction Y perpendicular to the paper transport direction X for positioning and aligning both side edges of the stacked paper P. The sheet feeding side fence pair 36 has a well-known configuration and is not shown in the figure. For example, a so-called rack and pinion similar to that shown in FIGS. 3 and 14 of Japanese Patent Laid-Open No. 2000-225763 is provided. The mechanism is configured to be able to move in the same direction by the same distance in the paper width direction Y.

Above the paper feed tray 30, a paper feed roller 31, a separation roller 32, and a separation pad 33 each having a high friction resistance member on the surface are disposed. The paper feed roller 31 is in pressure contact with the paper P on the paper feed tray 30 at a predetermined pressure. The paper feed roller 31 and the separation roller 32 are connected via a driving force transmission means (not shown) such as a gear or a belt. The common stepping motors are driven to rotate in synchronization with each other. The separation pad 33 is in pressure contact with the separation roller 32 upward at a predetermined pressure. In the drawing, reference numeral 36 denotes a pair of paper feed side fences (positions on the front side of the paper are omitted in FIG. 1) for positioning and aligning both side edges of the paper P, and reference numeral 39 is loaded on the paper feed tray 30. A sheet feeding surface plate for aligning the leading ends of the sheets P to be printed is shown.
The paper feed roller 31, the separation roller 32, and the separation pad 33 constitute a paper feed unit that separates and feeds the paper P on the paper feed tray 30 one by one.

  A pair of registration rollers 34 is arranged on the downstream side of the separation roller 32 and the separation pad 33 in the sheet conveyance direction. The registration roller pair 34 includes a driving roller 34b and a driven roller 34a, and a rotational driving force from a plate cylinder driving unit (not shown) is transmitted at a predetermined timing through a driving transmission unit such as a gear or a cam. The driving roller 34b rotates at a predetermined timing synchronized with the rotation of the plate cylinder 8, and the paper P is fed toward the printing unit 2 by the driven roller 34a pressed against the driving roller 34b. There is a configuration in which the driving roller 34b is rotationally driven at a predetermined timing by a stepping motor (not shown). The driven roller 34a is separated from the driving roller 34b through contact / separation means (not shown) at a predetermined timing so as not to overload the rotational conveyance due to the pressure contact between the plate cylinder 8 and the press roller 10. ing.

The plate removal unit 5 includes an upper plate removal member 40, a lower plate removal member 41, a plate removal box 42, a compression plate 43, and the like.
The upper plate discharging member 40 includes a driving roller 45, a driven roller 44, an endless upper conveying belt 48 spanned between these rollers 44, 45, and the like. The driving roller 45 is driven to rotate in the clockwise direction in FIG. 1 by a plate discharge driving means (not shown) made of, for example, a plate discharge motor, so that the upper conveying belt 48 moves in the arrow direction in FIG. The lower plate discharging member 41 includes a driving roller 47, a driven roller 46, an endless lower conveying belt 49 spanned between these rollers 46, 47, and the like. The driving roller 47 transmits the driving force of the unillustrated plate driving means (not shown) that rotationally drives the driving roller 45 through a driving transmission means such as a gear or a belt, so that the lower conveying belt 49 moves in the direction of the arrow in FIG. Moving. Further, the lower plate discharging member 41 is movably provided by a moving means (not shown), and the lower conveying belt 49 positioned on the outer peripheral surface of the driving roller 45 is in contact with the outer peripheral surface of the plate cylinder 8 as shown in FIG. It selectively occupies the contact position.
The plate removal box 42 stores the used master 26a therein and is detachably attached to the printing apparatus main body 1A. The compression plate 43 pushes the used master 26a carried by the upper plate discharging member 40 and the lower plate discharging member 41 into the plate discharging box 42, and is supported by an elevating means (not shown) so as to move up and down.
The plate discharging unit 5 is not limited to this, and if a simpler and cheaper stencil printing apparatus is desired, for example, the upper conveying belt 48 and the lower conveying belt 49 are removed, and the driven rollers 44, 46 and It may be configured to convey the used master 26a by the drive rollers 45 and 47, and has the same configuration as the pair of discharge rollers (5) shown in FIGS. 1 to 3 of Japanese Patent Laid-Open No. 2000-43394. Things can be used.

The paper discharge unit 6 includes a peeling claw 50, a paper discharge suction conveyance device 51, a paper discharge tray 52, and the like.
The peeling claw 50 has a function of peeling the printed paper P from the outer peripheral surface of the plate cylinder 8. The peeling claw 50 is swingably supported by a pair of paper discharge side plates fixed to the printing apparatus main body 1A via a support shaft 50a. Are selectively swung between a position near the outer peripheral surface of the plate and a position where the tip does not interfere with an obstacle such as the clamper 13 that is moved by the rotation of the plate cylinder 8.
The paper discharge suction conveyance device 51 includes a driving roller 53, a driven roller 54, a paper discharge belt 55, a suction fan 56, and the like.
The drive roller 53 is rotatably supported by the paper discharge side plate pair (not shown) and is driven to rotate by a drive means (not shown). The driven roller 54 is also rotatably supported by the paper discharge side plate pair, and a plurality of paper discharge belts 55 made up of endless belts are stretched between the driving roller 53 and the driven roller 54. A suction fan 56 is disposed below the drive roller 53, the driven roller 54 and the paper discharge belt 55. The paper discharge suction conveyance device 51 indicates the paper P printed on the paper discharge belt 55 by the suction force of the suction fan 56 (hereinafter sometimes referred to as “paper discharge P” for simplification of explanation). Transport in the direction.

  The paper discharge tray 52 has a function as a paper discharge tray on which the printed paper P conveyed by the paper discharge suction conveyance device 51 is stacked on the upper surface thereof. The paper discharge tray 52 can be manually moved and adjusted in the paper width direction in accordance with the position of the paper feed tray 30 that has been moved and adjusted in the paper width direction in the paper feed unit 4 described above. It is configured. This configuration will be described in detail later.

The paper discharge tray 52 receives a pair of paper discharge side fences 57 that are manually movable in the paper width direction for positioning and aligning both side ends of the printed paper P (paper discharge P), and the front end of the paper discharge P. A single paper discharge end fence that can be manually adjusted in the paper transport direction X (hereinafter referred to as “paper discharge direction Xa” in the paper discharge unit 6) for positioning and aligning the front end of the paper discharge P. 58.
As will be described in detail later, the paper discharge side fence pair 57 is configured to slide independently via the paper discharge tray 52, the leaf spring 93, and the slide cover 94 as shown in FIG.
As will be described in detail later, as shown in FIG. 1, the paper discharge tray 52 is disposed in the paper width direction with respect to the paper discharge tray support bracket 59 fixed to the inside of the paper discharge side plate pair (not shown). It is mounted and supported so that it can be moved and adjusted.

An image reading unit 7 is disposed above the printing apparatus main body 1A. The image reading unit 7 includes a document receiving tray 61 on which the document 60 is stacked, a contact glass 62 on which the document is placed, a document transport roller pair 63 and a document transport roller 64 for transporting the document 60, and a guide for guiding the document 60 to be transported. Plates 65, 66, a plurality of document conveying belts 67 that convey the document 60 along the contact glass 62, a document tray 68 on which the scanned document 60 is stacked, and the members other than the contact glass 62 are supported on the contact glass 62. A pressure plate 69 provided so as to be movable toward and away from the projector, reflection mirrors 70 and 71 and a fluorescent lamp 72 for scanning and reading a document image, a lens 73 for focusing reflected light of the scanned image, and reflection of the focused image. An image sensor 74 such as a CCD (charge coupled device) that photoelectrically converts light is included.
In the above configuration, the automatic document feeder 75 (hereinafter abbreviated as “ADF75”) is constituted by the document tray 61, the document conveyance roller pair 63, the document conveyance roller 64, the guide plates 65 and 66, the document conveyance belt 67, and the document tray 68. However, the contact glass 62, the reflecting mirrors 70 and 71, the fluorescent lamp 72, the lens 73, and the image sensor 74 constitute an original reading means 76 called a scanner.

  A plurality of document size detections for detecting the size of the document 60 to be transported or the document 60 placed on the contact glass 62 are located between the plurality of document transport belts 67 and below the contact glass 62. A sensor 77 is arranged. The document size detection sensor 77 is a reflection type photosensor, and detects the size of the document 60 based on the difference in the amount of reflected light of the document 60 positioned on the contact glass 62. A document presence / absence detection sensor 78 for detecting the document 60 remaining on the document tray 61 is disposed below the document tray 61. The document presence / absence detection sensor 78 is a reflection type photosensor, and is directed to a control device 120 (described in detail later) provided in the printing apparatus main body 1A when the document 60 is no longer on the document receiving tray 61. Output a signal.

Based on the above configuration, the overall operation of the stencil printing apparatus 1 will be described with reference to FIG. The operations related to the paper feed unit 4, the paper discharge unit 6, and the control device 120, which are specific to the present embodiment, will be described after the detailed configuration of the paper discharge unit 6, the control device 120, and the like specific to the present embodiment are described in detail. I decided to. The operation of the stencil printing apparatus 1 is performed under the control of the control device 120.
After an original 60 is set on the original receiving tray 61 of the image reading unit 7 and the paper P is replenished to the paper supply tray 30 of the paper supply unit 4 by the operator, it is disposed on the operation panel 130 shown in FIG. When a plate-making start key (not shown) is pressed, a start signal is generated. When this signal is transmitted to the control device 120, first, a plate discharging operation of the used master 26a in the plate discharging unit 5 is performed.

  When the plate cylinder 8 starts to rotate in the direction of arrow A in the drawing and the clamper 13 of the plate cylinder 8 stops at the plate discharge position after passing through the drive roller 47, the plate discharge driving means is operated and the drive rollers 45, 47 are rotated. When driven, the lower plate discharging member 41 moves toward the plate cylinder 8, whereby the lower conveying belt 49 positioned on the outer peripheral surface of the driven roller 46 comes into contact with the used master 26 a on the plate cylinder 8. Subsequently, when the plate cylinder 8 is restarted to rotate in the direction of arrow A in the drawing, the used master 26a scooped up from the plate cylinder 8 by the movement of the lower conveying belt 49 becomes the lower plate removal member 41 and the upper plate removal. It is nipped and conveyed by the member 48 and peeled off from the outer peripheral surface of the plate cylinder 8. The used master 26 a that has been peeled is discarded into the discharge box 42 and then compressed by the compression plate 43. Even after all the used masters have been peeled off, the plate cylinder 8 continues to rotate, and the clamper 13 rotates to a predetermined plate feed standby position located substantially to the right as shown in FIG. When the plate cylinder 8 stops at the plate feeding standby position, the opening / closing means (not shown) is operated to open the clamper 13, and the stencil printing apparatus 1 enters the plate feeding standby state.

In parallel with the above plate ejection operation, the image reading unit 7 performs the reading operation of the document 60. When the pressure plate 69 is opened, image reading when the document is placed on the contact glass 62 is performed by the operation of the document reading means 76. That is, the reflected light illuminated by the fluorescent lamp 72 is reflected by the reflecting mirrors 70 and 71, and the reflected light related to the read document image is focused by the lens 73 and then incident on the image sensor 74. It is photoelectrically converted. An electric signal related to the photoelectrically converted image data is input to an A / D conversion unit (not shown) in the printing apparatus main body 1A, and then stored in an image memory (not shown) via an image processing device (not shown).
On the other hand, the image reading of the document 60 when the ADF 75 is used is different from the above-described case only in that one document 60 is sent onto the contact glass 62 which is a reading unit when the ADF 75 is operated. Thereafter, in the same manner as described above, the image of the original 60 is read as optical information by the operation of the original reading means 76, and an electric signal related to the image data is stored in the image memory (not shown). . Furthermore, in preparation for the next plate making operation, image data is sequentially called from the image memory and processed as a digital image signal via a plate making control device (not shown) (which may be arranged in the control device 100). Then, it is transmitted to a thermal head drive circuit (not shown) disposed in the plate making unit 3.
The digital image signal transmitted to the image processing apparatus (not shown) is shown in FIG. 8 via a PC (personal computer) controller from a network (not shown) configured to be communicably connected to the stencil printing apparatus 1. There is also a case where an input is made to the control device 120.

  When the stencil printing apparatus 1 enters a plate feeding standby state, a plate making operation is performed in part in parallel with the reading operation of the document 60. That is, image data is sequentially called from the image memory and processed as a digital image signal via a plate making control device (not shown) (which may be provided in the control device 100), and a thermal head drive circuit (not shown) Is transmitted to the thermal head 22. As a result, each heating element of the thermal head 22 is energized in a pulsed manner in the main scanning direction to selectively generate heat, and the stepping motor (not shown) is driven to rotate, whereby the platen roller 21 and the master transport roller pair are rotated. 24 starts rotating, while the master 26 is pulled out from the master roll 27 and is transported in the master transport direction, the thermoplastic resin film portion of the master 26 is selectively heated and punched according to image information, and the master 26 A plate-making image is formed at 26. The pre-made master 26 on which the pre-made image is formed is stored in the bending box 29.

  When a predetermined amount of the master-making master 26 is stored in the flexure box 29, the master transport roller pair 25 is transported by starting to rotate, and is expanded with respect to the stage unit 12 while being guided by the guide plate 28. When it is determined that the number of steps of the stepping motor has reached a set value and the leading end of the master-making master 26 has reached a predetermined position sandwiched by the clamper 13, the opening / closing is performed. The clamper 13 is closed by the operation of the means, and the leading end portion of the master 26 which has been made is held on the outer peripheral surface of the plate cylinder 8.

  After clamping the leading end of the master 26 that has been subjected to plate making, the plate cylinder 1 resumes rotating at a peripheral speed that is substantially the same as the plate making and conveying speed (master conveying speed), and the master 26 that has been subjected to plate making and the platen roller 21 and each master conveying roller. The plates are fed by the pairs 24 and 25 so as to be wound around the outer peripheral surface of the plate cylinder 8. When the controller 120 determines that the plate making for one plate has been completed by the rotational driving of the predetermined number of steps of the stepping motor, the rotation of the platen roller 21 and each of the master conveying roller pairs 24 and 25 and the plate cylinder 1 is stopped. At the same time, the movable blade 23b rotates and moves in the master width direction along the fixed blade 23a to cut the rear end of the master 26 that has been subjected to plate making. The master plate 26 that has been cut is drawn out of the plate making section 3 by the rotation of the plate cylinder 8, and when all the master plates 26 that have been made are wound on the plate cylinder 8, the plate cylinder 8 rotates to the home position. Stops and the winding operation is completed.

When the winding operation is completed, the plate cylinder 8 is rotationally driven in the direction of arrow A (clockwise direction) in FIG. 1 at a low speed for printing, and one sheet P is separated and fed from the sheet feeding unit 4. The That is, the uppermost sheet P on the sheet feeding tray 30 is sent out in the sheet conveying direction X by the rotation of the sheet feeding roller 31, and is further separated and fed by the cooperative action of the separation roller 32 and the separation pad 33. P is temporarily stopped with its tip abutting against the nip portion of the registration roller pair 34. The temporarily stopped paper P is driven at a predetermined timing when the leading edge of the image area of the master 26 that has been wound around the plate cylinder 8 reaches a position corresponding to the press roller 10. Is driven to rotate between the plate cylinder 8 and the press roller 10.
Almost simultaneously with the rotation of the drive roller 34b, the contact / separation means (not shown) is operated, so that the press roller 10 swings and rises so as to press the outer peripheral surface thereof against the outer peripheral surface of the plate cylinder 8. The fed paper P is pressed by the master 26 which has been made around the plate cylinder 8. By this pressing operation, the press roller 10, the paper P, and the master plate 26 are pressed against each other, and the ink supplied to the inner peripheral surface of the plate cylinder 8 by the ink roller 14 oozes out from the opening portion of the plate cylinder 8, The exuded ink is filled in the porous support plate 8a, the mesh screen (not shown) and the porous support of the master 26 that has been made, and then transferred and transferred to the paper through the perforated portion of the master 26. So-called plate printing / printing is performed so that the master 26 which has been subjected to plate making is filled with ink so as to be in close contact with the outer peripheral surface of the plate cylinder 8.
At this time, the ink roller 14 also rotates in the same direction as the rotation direction of the plate cylinder 8. The ink in the ink reservoir 15 a is attached to the surface of the ink roller 14 by the rotation of the ink roller 14, and its amount is regulated when passing through the gap between the ink roller 14 and the doctor roller 15, and the inner peripheral surface of the plate cylinder 8. To be supplied.

The sheet P onto which the image has been transferred by printing is peeled off from the outer peripheral surface of the plate cylinder 8 by the peeling claw 50 and falls downward, and is discharged in the counterclockwise direction on the discharged sheet suction conveyance device 51. It is sent onto the belt 55. The sheet P (sheet discharge P) sent onto the sheet discharge belt 55 is attracted to the upper surface of the sheet discharge belt 55 by the suction force of the suction fan 56 and is discharged in the left sheet discharge direction Pa (the same direction as the sheet conveyance direction X). However, it is also conveyed in the paper discharge direction of the printed paper P for distinction), and both end surfaces of the paper discharge P are aligned by the paper discharge side fence pair 57 and discharged by the paper discharge end fence 58. The paper P is discharged in an orderly manner on the paper discharge tray 52 while the leading ends of the paper P are aligned. Thereafter, the plate cylinder 8 is rotated again to the home position and stopped, and the stencil printing apparatus 1 enters a printing standby state after the above plate-making operation is completed.
After the printing operation is completed, the printing conditions are set by operating various keys on the operation panel 130, and then the test printing key (not shown) on the operation panel 130 is pressed by the operator, whereby the printing as described above is performed. Only one sheet is printed by the operation. Note that the trial printing operation is mainly different from the above-described printing operation in that it is the printing speed set in the printing condition setting.
When the image position, the image density, and the like are determined by trial printing, the print start key (not shown) on the operation panel 130 is pressed by the operator after these printing conditions and the number of prints are set. A predetermined number of prints set by the printing operation as described above is printed. Further, when a continuous key (not shown) on the operation panel 130 is pressed and various conditions are set and then a plate making start key (not shown) is pressed, a printing operation is continuously performed after the printing is finished. Done.

With reference to FIGS. 1 to 3, a paper feed table moving mechanism as a paper feed table movement adjusting means for moving and adjusting the print image position will be described.
In FIG. 3, reference numeral 110 denotes a paper feed table moving mechanism. The paper feed platform moving mechanism 110 is for manually moving and adjusting the print image position, and the paper feed tray 30 is fixed to a pair of paper feed side plates (not shown) on the printing apparatus main body 1A side. This is for setting the position of the paper feed tray support bracket 38, which is a stationary member, by manually moving and adjusting it in the paper width direction Y orthogonal to the paper transport direction X.
The sheet feeding table moving mechanism 110 is caulked and fixed to the side wall of the sheet feeding tray support bracket 38, and forms a screw shaft 35a extending in the sheet width direction Y to form a male screw, and a female screw meshing with the screw shaft 35a. The paper feed tray moving dial 35 as manual position adjusting means, two rib portions 35b formed integrally with the paper feed tray 30 and passing through the screw shaft 35a loosely, and the paper feed tray 30 in the paper width direction Y As an auxiliary guide means for guiding the paper, the three long holes 38a formed long in the paper width direction Y of the paper feed tray support bracket 38 and the loosely fitted into these holes 38a are screwed into the back wall of the paper feed tray 30. It is mainly composed of three stepped screws 35c to be attached.

For example, the components of the sheet feed table moving mechanism 110 are assembled as follows. In FIG. 3, first, after the screw shaft 35a is caulked and fixed to the side wall of the paper feed tray support bracket 38, the paper feed tray moving dial 35 is sandwiched between the two rib portions 35b. In the figure, the tip of the screw shaft 35a is inserted from the left side, and the feed tray moving dial 35 is rotated so as to be engaged with the male screw of the screw shaft 35a, while the tip of the screw shaft 35a is moved out of the two rib portions 35b. In the drawing, it is also inserted on the right side, and by further turning the paper feed tray moving dial 35, the paper feed tray moving dial 35 is screwed with a male screw portion of a predetermined length of the screw shaft 35a. Thereafter, three step screws 35 c are inserted into the three long holes 38 a of the paper feed tray support bracket 38 and screwed to the paper feed tray 30.
When the vertical wall flange in the paper width direction Y of the paper feed tray support bracket 38 becomes an obstacle and cannot be easily assembled as described above, the screw shaft 35a is caulked against the side wall of the paper feed tray support bracket 38 last. You may make it carry out.

As shown in FIG. 6 and FIG. 7, below the back surface of the paper feed tray 30, a paper feed tray position detection board that constitutes a paper feed stand position detection detection unit that detects the position of the paper feed tray 30 in the paper width direction Y. 111 is fixed to the upper wall of the paper feed tray support bracket 38.
On the other hand, a contact 112 that is in contact with the paper feed tray position detection substrate 111 is fixed to the back wall of the paper feed tray 30. Here, the sheet feeding tray 30 is usually formed of an electrical insulating material (non-conductor) such as resin, and the contact 112 is formed of a conductive material such as stainless steel having a leaf spring shape. The tray 30 and the contact 112 are electrically insulated. However, the configuration is not limited as long as the paper feed tray 30 and the contact 112 are electrically insulated. The contact 112 has a structure in which a lower end portion is branched and bent into a plurality of rakes, and contacts a detection pattern formed on the paper feed tray position detection substrate 111 as shown in FIG. . As shown in FIG. 7, a plurality of detection patterns corresponding to the number of contacts 112 are formed on the surface of the paper feed tray position detection board 111, and the branched tip portion of the contacts 112 contacts the detection patterns. By doing so, the signal is turned on. Since there are a plurality of such detection patterns, the absolute position of the paper feed tray 30 in the paper width direction Y can be determined by a combination thereof. The contact 112 is always in contact with the ground portion of the detection pattern.

  Since the configuration is as described above, the absolute position of the paper feed tray 30 in the paper width direction Y can be determined. The detection accuracy differs depending on the number of branches of the contact 112. For example, when the number of branches is 7 (one), one is used for grounding and the other six are used for detection. Thus, the absolute position of the paper feed tray 30 in the paper width direction Y can be detected in units of several millimeters or less with a relatively inexpensive configuration.

As described above, the paper feed stand position detecting means for detecting the position of the paper feed tray 30 in the paper width direction Y is the contact 112 provided on the paper feed tray 30 and the paper feed provided on the paper feed tray support bracket 38. The tray position detection board 111 is configured. According to the position detection method of the pair of side fences 51 by this detection means, for example, compared to a method in which a large number of transmissive or reflective photosensors are arranged, for example, there is an advantage that the configuration is relatively simple and inexpensive. Have.
Here, the position detection method of the paper feed tray 30 is not limited to the above-described configuration as long as the above advantages are not desired. For example, a plurality of transmission type photosensors are arranged, and a portion of the portion is a shielding plate. Needless to say, there are many other means such as detecting the position by passing through. The same applies to the detection of the position of a paper discharge tray 52 described later and a paper discharge tray 52A shown in FIG. 9 and the like in the second embodiment.
The amount of movement of the paper feed tray 30 in the paper width direction Y is based on the standard position (home position) of the paper feed tray 30 in the paper width direction Y with respect to the paper feed tray support bracket 38. Alternatively, a visible scale display may be attached to an appropriate portion of the paper feed tray 30, or a visible scale display may be attached to the outer peripheral portion of the paper feed tray moving dial 35.

With reference to FIG. 1 and FIGS. 4 to 8, the configuration of the paper discharge unit 6, the control device 120, and the like specific to this embodiment will be described in detail.
The greatest feature of the present embodiment is that the sheet discharge tray is manually adjusted in accordance with the position of the sheet feed tray 30 that is moved and adjusted in the sheet width direction Y by the sheet feed table moving mechanism 110 as shown in FIGS. The paper discharge table manual movement adjustment means 115 for moving and adjusting the sheet 52 in the paper width direction Y is provided.
The paper discharge table manual movement adjusting means 115 is, in a simple manner, for manually moving and adjusting the paper discharge P discharged and stacked on the paper discharge tray 52 in the paper width direction Y. In other words, the paper discharge tray manual movement adjusting means 115 is a paper discharge tray support bracket 59 which is a stationary member fixed to a paper discharge side plate pair (not shown) on the printing apparatus main body 1A side. On the other hand, the position is set by manually adjusting the movement in the paper width direction Y.
The paper discharge stand manual movement adjusting means 115 is screwed and fixed to the side wall of the paper discharge tray support bracket 59, extends in the paper width direction Y and has a male screw, and a female screw meshing with the screw shaft 59a. A paper discharge tray moving dial 59c as a manual position adjusting means formed with two, rib portions 59b formed integrally with the paper discharge tray 52 and loosely inserted through the screw shaft 59a, and the paper discharge tray 52 with the paper width Three auxiliary holes 59e formed long in the paper width direction Y of the paper discharge tray support bracket 59 as auxiliary guide means for guiding in the direction Y and the back wall of the paper discharge tray 52 loosely fitted in these holes And three stepped screws 59d to be screwed to the main body.
The screw shaft 59a is formed of a metal such as a steel material. The paper discharge tray moving dial 59c is formed of a resin such as polyacetal resin (POM) having a predetermined strength and excellent wear resistance and a relatively small friction coefficient. The outer peripheral surface of the discharge tray moving dial 59c is knurled to improve operability.

For example, the components of the discharge table manual movement adjusting means 115 are assembled as follows. In FIG. 3, the screw shaft 59a is first caulked and fixed to the side wall of the discharge tray support bracket 59, and then the discharge tray movement dial 59c is sandwiched between the two rib portions 59b. In the figure, the tip of the screw shaft 59a is inserted from the left side, and the discharge tray moving dial 59c is rotated so as to be engaged with the male screw of the screw shaft 59a, while the tip of the screw shaft 59a is moved out of the two rib portions 59b. In the drawing, the sheet is also inserted on the right side, and further the sheet discharge tray moving dial 59c is turned, so that the sheet discharge tray moving dial 59c is screwed with the male screw portion having a predetermined length of the screw shaft 59a. Thereafter, three stepped screws 59d are inserted into the three long holes 59e of the discharge tray support bracket 59 and screwed to the discharge tray 52 in this order.
In the case where each of the components cannot be easily assembled as described above due to the standing wall flange in the paper width direction Y of the paper discharge tray support bracket 59 as an obstacle, the side wall of the paper discharge tray support bracket 59 of the screw shaft 59a. You may make it carry out caulking and sticking to the last.

As shown in FIGS. 6 and 7, below the back surface of the paper discharge tray 52, a paper discharge tray position detection board constituting a paper discharge tray position detection detecting means for detecting the position of the paper discharge tray 52 in the paper width direction Y is shown. 116 is fixed to the upper surface wall of the discharge tray support bracket 59.
On the other hand, a contactor 117 that is in contact with the discharge tray position detection board 116 is fixed to the back wall of the discharge tray 52. Here, like the paper feed tray 30, the paper discharge tray 52 is usually formed of an electrical insulating material (non-conductor) such as a resin, and the contact 117 is a conductive material such as stainless steel having a leaf spring shape. Thus, the paper discharge tray 52 and the contact 117 are electrically insulated. However, the configuration is not limited as long as the paper discharge tray 52 and the contact 117 are electrically insulated. The shape of the contactor 117 and the detailed configuration of the paper discharge tray position detection board 116 are the same as those of the contactor 112 and the paper feed tray position detection board 111 in the paper feed unit 4 described above, and thus description thereof is omitted.

Since the configuration is as described above, the absolute position of the paper discharge tray 52 in the paper width direction Y can be determined. Although the detection accuracy differs depending on the number of branches of the contact 117, for example, when the number of branches is 7 (one), when one is used for grounding and the other six are used for detection, 2 6 = 64 Thus, the absolute position in the paper width direction Y of the paper discharge tray 52 can be detected in units of several millimeters or less with a relatively inexpensive configuration.
As described above, the paper discharge tray position detection means for detecting the position of the paper discharge tray 52 in the paper width direction Y is the contact 117 provided on the paper discharge tray 52 and the paper discharge provided on the paper discharge tray support bracket 59. The tray position detection board 116 is configured. According to the position detection method of the discharge tray 52 by this detection means, for example, compared with a method in which a large number of transmissive or reflective photosensors are arranged, for example, there is an advantage that the configuration is relatively simple and inexpensive. Have.
Note that the means for confirming the amount of movement of the paper discharge tray 52 in the paper width direction Y is the standard position (in the paper width direction Y of the paper discharge tray 52 with respect to the paper discharge tray support bracket 59) as in the case of the paper feed tray 30. On the basis of the home position), a visible scale display may be attached to an appropriate portion of the paper discharge tray support bracket 59 or the paper discharge tray 52, or a scale visible on the outer periphery of the paper discharge tray moving dial 59c. An indication may be attached.

A supplementary description of the configuration of the paper discharge tray 52 will be given. Although the paper discharge side fence pair 57 and the paper discharge end fence 58 are not shown in the present embodiment, the configuration shown in FIG. It can be held with holding force.
In FIG. 4, reference numeral 118 denotes a fixing lever 118 for locking the movement of the paper discharge side fence pair 57 in the paper width direction Y, and reference numeral 52 a denotes the discharge end fence 58 in the double arrow direction of the paper discharge direction Xa. The escape grooves for moving the paper discharge end fence 58 to be movable are respectively shown.

A supplementary description will be given of the configuration of the operation panel 130. The operation panel 130 is shown schematically in FIG. The operation panel 130 is provided with various keys (not shown) (the plate making start key, the numeric keypad, the printing start key, the continuous key, etc.), and liquid crystal via a liquid crystal driving circuit (not shown). A liquid crystal display (LCD) (not shown) that is driven to display characters and images on the display unit 131 and a buzzer 132 that is driven via a buzzer driving circuit are also provided.
The liquid crystal display unit 131 includes a position in the sheet width direction Y in the sheet feeding tray 30 that has been moved and adjusted by the sheet feeding table moving device 110, and a sheet in the sheet discharge tray 52 that has been moved and adjusted by the sheet discharging table manual movement adjusting unit 115. It has a function as notifying means, display means or warning means capable of notifying the alignment state with the position in the width direction Y. The buzzer 132 also has a function as a notification means or warning means similar to the above. Of course, the buzzer 132 is not limited to the operation panel 130 and may be disposed in another part in the printing apparatus main body 1A.

Next, a control configuration used in the stencil printing apparatus 1 will be described with reference to FIG.
In the figure, a control device 120 as a control means includes a microcomputer having a CPU 121, a ROM 122, a RAM 123, a timer (not shown), an I / O (input / output port) 124, and the like. The RAM 123 may be a nonvolatile memory such as a flash memory.

  The CPU 121 detects various signals from various keys (the plate making start key, the numeric keypad, the printing start key, the continuous key, etc.) provided on the operation panel 130, and detects a paper feed tray position provided in the paper feed unit 4. Based on the substrate 111, the discharge tray position detection board 116 provided in the discharge unit 6, the various output signals from the various sensors of the apparatus main body 1A, and the operation program called from the ROM 122, the printing unit 2, the plate making unit 3, Each of the driving means (actuators such as motors and solenoids) provided in the paper feeding unit 4, the plate discharging unit 5, the paper discharging unit 6, and the image reading unit 7, and the liquid crystal display unit 131 and the buzzer 132 disposed on the operation panel 130. The operation and the like are controlled to control the operation of the stencil printing apparatus 1 as a whole.

  The ROM 122 stores an operation program and related data for the entire stencil printing apparatus 1, and this operation program is appropriately called according to the CPU 121. The RAM 123 is set / input from a function for temporarily storing the calculation result of the CPU 121, each data signal from the paper feed tray position detection board 111, the paper discharge tray position detection board 116, and various keys on the operation panel 130. It has a function of storing data signals and on / off signals as needed. Note that only the function of performing operations peculiar to the present embodiment to be described later may be added to the CPU 121, the ROM 122, and the RAM 123 of the control device 120.

The CPU 121 of the control device 120 performs the liquid crystal display unit 131 on the basis of the data signals as output signals from the paper feed tray position detection board 111 and the paper discharge tray position detection board 116, and the paper width direction in the paper feed tray 30. It has a function as a control means for displaying and notifying the alignment state between the Y position and the position in the paper width direction Y in the paper discharge tray 52, and causing the buzzer 132 to blow and warn in the case of an inconsistency state.
In the present embodiment, the liquid crystal display unit 131 and the buzzer 132 are provided, but only one of them may be provided. Further, the present invention is not limited to this, and it may be a warning / notification such as lighting / blinking display using an LED (light emitting diode) or the like. good.

Based on the above-described configuration, operations unique to the present embodiment will be described.
First, an operation for adjusting the print image position will be described. For example, the position of the platemaking image is shifted to either the left or right of the sheet width direction Y with respect to the position in the sheet width direction Y of the platemaking image formed on the platemaking master 26 on the plate cylinder 8. In this case, if the plate making / plate feeding operation is performed after the image reading of the original document is performed again as described above, the master is wasted and the total printing time is increased. In such a case, in order to save the master and / or the total printing time, it is necessary to adjust the position of the print image in the paper width direction Y by a simple method.
Therefore, when the position of the print image is to be adjusted in the paper width direction Y, the operator turns the paper feed tray moving dial 35 on the paper feed tray 30 of the paper feed unit 4 in an appropriate rotation direction. Thereby, the rotational movement of the paper feed tray moving dial 35 screwed with the screw shaft 35a is converted into a linear motion for moving the paper feed tray 30 in the paper width direction Y by the screw mechanism, and the stationary screw shaft 35a. When the sheet feeding tray movement dial 35 rotates with respect to the sheet feeding tray moving dial 35, the side surface of the sheet feeding tray movement dial 35 is paper with respect to any one of the two rib portions 35 b substantially integral with the sheet feeding tray 30. By pressing the paper feed tray 30 in the width direction Y in the direction of moving, the paper feed tray 30 itself moves according to the rotation amount (rotation angle) of the paper feed tray movement dial 35. Thereby, the print image printed on the paper P can be moved and adjusted in the paper width direction Y.
At this time, the position in the paper width direction Y of the paper feed tray 30 that is moved and adjusted in the paper width direction Y is detected by the paper feed tray position detection board 111, and a signal related to the position in the paper width direction Y is sent from the control device 120. It is transmitted to the CPU 121.

  The above operation can be performed before or after the paper P is loaded and set on the paper feed tray 30. Before the paper P is set, the paper feed tray 30 itself is moved to shift the print image position in advance. You can leave it. Further, the print image position can be adjusted after the paper P is set and the test printing is performed. The sheet P is set by moving the sheet feeding side fence pair 36 in the sheet width direction Y so as to abut against both end surfaces of the stacked sheets P, that is, after matching the sheet size, By operating a fixing lever 37 for locking the movement of the sheet 36 in the sheet width direction Y, the sheet feeding side fence pair 36 is fixed.

Next, the operator moves the paper discharge tray 52 in the paper width direction Y in accordance with the position of the paper feed tray 30 that is moved and adjusted in the paper width direction Y by the rotation operation of the paper feed tray movement dial 35 by the operator as described above. When it is desired to adjust the position, the paper discharge tray moving dial 59c on the paper discharge tray 52 is rotated in an appropriate rotation direction. As a result, the rotational movement of the discharge tray moving dial 59c screwed with the screw shaft 59a is converted into a linear movement that moves the discharge tray 52 in the paper width direction Y by the screw mechanism, and the fixed screw shaft 59a. The paper discharge tray movement dial 59c rotates with respect to the paper discharge tray movement dial 59c so that the side surface of the paper discharge tray movement dial 59c is substantially the same as the paper discharge tray 52 with respect to any one of the two rib portions 59b. By pressing the discharge tray 52 in the width direction Y in the direction of moving, the discharge tray 52 itself moves according to the rotation amount (rotation angle) of the discharge tray moving dial 59c. As a result, the paper discharge P (printed image printed on it) can be moved and adjusted in the paper width direction Y.
At this time, when the power switch disposed in the stencil printing apparatus 1 is in an ON state and when the stencil making start key is pressed or when the printing start key is pressed, the feeding adjusted in the paper width direction Y is adjusted. If the position of the paper discharge tray 52 that has been moved and adjusted in the paper width direction Y does not match or align with the position of the paper tray 30, an instruction from the CPU 121 of the control device 120 informs the liquid crystal display unit 131 to that effect. As a warning display, for example, a message such as “the paper feed tray and the paper discharge tray are not aligned” is displayed, and at the same time, the buzzer 132 sounds. The operator is alerted by the warning display on the liquid crystal display unit 131 and the sound of the buzzer 132, and confirms the position of the paper discharge tray 52 or operates the paper discharge tray moving dial 59c again to open the paper discharge tray 52. The movement is adjusted in the paper width direction Y.

  The liquid crystal display 131 of the operation panel 130 displays the position / movement amount of the paper feed tray 30 that has been moved and adjusted in the paper width direction Y, and the movement is adjusted in the paper width direction Y by making the operator visually recognize this. Of course, it is also possible to notify the amount of movement of the paper discharge tray 52 to be performed.

According to the present embodiment, the paper discharge tray manual movement adjusting means 115 that manually adjusts the movement of the paper discharge tray 52 in the paper width direction Y according to the position of the paper feed tray 30 that has been adjusted in the paper width direction Y is provided. Accordingly, the paper discharge tray 52 itself can be moved and adjusted in the paper width direction Y, and the paper discharge side fence pair 57 and the paper discharge end fence with respect to the discharge position of the paper discharge P (printed paper). Since the paper is discharged without the position of the pair 58 being shifted, the quality of the alignment of both ends of the paper discharge P can be maintained, and the stencil printing apparatus 1 having a simple configuration and being inexpensive can be provided.
Further, according to the present embodiment, the liquid crystal display unit 131 is used to feed the paper feed tray 30 based on the data signals (each output signal) from the paper feed tray position detection board 111 and the paper discharge tray position detection board 116. Of the control unit 120 for displaying and notifying the alignment state between the position in the sheet width direction Y and the position in the sheet width direction Y in the paper discharge tray 52, and causing the buzzer 132 to sound and warn in the case of inconsistency. By having the CPU 121 (control means), a warning is displayed / notified when the respective positions do not match, so that incorrect settings and erroneous operations can be eliminated.

  Note that the control device 120 including the paper feed tray position detection board 111, the paper discharge tray position detection board 116, the contacts 112 and 117, and the CPU 121 and the like related to the functional parts is not an essential configuration. If an inexpensive stencil printing apparatus is desired, it may be removed. In other words, the embodiment of the present invention is not limited to the first embodiment, but the paper feed tray position detection board 111, the paper discharge tray position detection board 116, the contacts 112 and 117, and the related elements from the second embodiment. The control device 120 including the CPU 121 and the like related to the functional part to be performed may be removed (hereinafter referred to as “variation 1”).

(Second Embodiment)
The second embodiment will be described with reference to FIGS. 9 to 13.
In the first embodiment, printing is performed in a state in which the sheet discharge tray 52 occupies the position adjusted to move in the same direction with respect to the position adjusted to move the sheet feed tray 30 in the sheet width direction Y. However, there is a case where due to the variation in the position of the print image, the collision of the leading end of the paper discharge P with the paper discharge end fence 58 does not hit uniformly and the paper discharge alignment to the paper discharge tray 52 is not good. Therefore, in such a case, a mechanism capable of adjusting the position by moving the paper discharge end fence 58 alone in the paper width direction Y is provided.

Compared with the first embodiment shown in FIGS. 1 to 8, the second embodiment uses a paper discharge unit 6 </ b> A shown in FIGS. 9 and 10 instead of the paper discharge unit 6. Only the difference. Compared with the paper discharge unit 6 of the first embodiment, the paper discharge unit 6A of the second embodiment manually adjusts the movement of the paper discharge end fence 58 that manually moves and adjusts the paper discharge end fence 58 in the paper width direction Y. The main difference is that the means 90 is provided, and the greatest feature is that it includes the paper discharge end fence manual movement adjusting means 90.
In other words, the paper discharge end fence manual movement adjusting means 90 supports the paper discharge tray which is a stationary member in which the paper discharge end fence 58 is fixed to a pair of paper discharge side plates (not shown) on the printing apparatus main body 1A side. The position of the bracket 59A is set by manually adjusting the movement in the paper width direction Y.

Compared with the paper discharge tray support bracket 59 shown in FIG. 5 etc. of the second embodiment, the paper discharge tray support bracket 59A in this embodiment is provided with a paper discharge end fence manual movement adjustment means 90. The main difference is that it has been enlarged in the paper direction Xa.
Further, the paper discharge tray 52A in this embodiment is provided with a paper discharge end fence manual movement adjusting means 90, compared to the paper discharge tray 52 shown in FIGS. 4 and 5 of the second embodiment. Accordingly, in order to make the paper discharge end fence 58 movable in the paper discharge direction Xa and the paper width direction Y, the paper discharge end fence 58 is enlarged in the paper width direction Y than the escape groove 52a for the paper discharge end fence 58 shown in FIG. An escape groove 52Aa is formed. As auxiliary guide means for guiding the paper discharge tray 52A in the paper width direction Y, there are three long holes 59Aa formed long in the paper width direction Y of the paper discharge tray support bracket 59A and loosely fitted in these. The three stepped screws 59d (only two are shown in FIG. 11 and the remaining one is omitted) screwed to a boss 52Ac (see FIG. 13) integrally formed on the back wall of the discharge tray 52A. It is composed of).

  As shown in detail in FIGS. 10 to 12, the discharge end fence manual movement adjusting means 90 is formed with a screw shaft 82 extending in the paper width direction Y to form a male screw and a female screw meshing with the screw shaft 82. Further, the end fence moving dial 80 as manual position adjusting means, two rib portions 83 formed integrally with the paper discharge end fence 58 and passing through the screw shaft 82 loosely, and both ends of the screw shaft 82 are made unrotatable. A slider formed with two screw shaft sliders 85 for supporting and fixing, and a long hole 86a for guiding the two screw shaft sliders 85 to which the screw shaft 82 is fixed so as to be movable in the double arrow direction of the paper discharge direction Xa. It is mainly composed of a guide bracket 86.

The screw shaft 82 is formed of a metal such as a steel material. The end fence moving dial 80 is made of, for example, a resin such as polyacetal resin (POM) having a predetermined strength and excellent wear resistance and a relatively small friction coefficient.
The screw shaft slider 85 includes a guided portion 85a that is fitted into the elongated hole 86a of the slider guide bracket 86, and is integrally formed of a resin such as polyacetal resin (POM) similar to the end fence moving dial 80, for example. ing.
The discharge end fence 58 includes, for example, a rib portion 83 via a rib connecting portion 83a integrally formed at a lower portion thereof, and a boss portion 58a integrally formed on the back wall as shown in FIG. It is integrally formed of a resin such as polycarbonate resin (PC).

For example, the components of the discharge end fence manual movement adjusting means 90 are assembled as follows. 11 and 12, each slider guide bracket 86 is temporarily fixed to the discharge tray support bracket 59A by a clamp or the like, and the end fence moving dial 80 is sandwiched between the two rib portions 83, and the two ribs The tip of the screw shaft 82 is inserted from the right side of the portion 83, for example, and the end fence moving dial 80 is rotated so as to mesh with the male screw of the screw shaft 82, while the tip of the screw shaft 82 is also on the left side of the two rib portions 83. The end fence moving dial 80 is screwed with a male screw portion of a predetermined length of the screw shaft 82 by inserting the end fence moving dial 80 and rotating the end fence moving dial 80. Thereafter, the guided portions 85a of the screw shaft sliders 85 are fitted into the long holes 86a of the slider guide brackets 86 that are temporarily fixed, and the anti-rotation cuts formed at both ends of the screw shaft 82 are inserted. The groove portion 82 is fitted into a hole formed in the screw shaft slider 85 and fixed with a screw 87.
Subsequently, each slider guide bracket 86 is performed in the order of fastening with screws to the discharge tray support bracket 59A.

  With reference to FIG. 13, when the paper discharge side fence pair 57 is moved and adjusted in the sheet width direction Y, a configuration in which the paper discharge side fence pair 57 is held at that position with an appropriate holding force will be described. Boss portions 91 are integrally formed at a plurality of locations in the paper width direction Y at the bottom of each paper discharge side fence 57. On the discharge tray 52 </ b> A side, a relief groove flange portion 52 </ b> Ad having a relief groove that allows the boss portion 91 to move together with each discharge side fence 57 is formed along the sheet width direction Y. A slide cover 94 is fastened to the lower portion of the escape groove flange portion 52Ad by a screw 95 via a plate spring 93 that is in sliding contact with the lower end surface of the escape groove flange portion 52Ad. Therefore, when each paper discharge side fence 57 is moved and adjusted in the paper width direction Y, an appropriate biasing force of the leaf spring 93 acts on the lower end surface of the escape groove flange portion 52Ad, and the paper discharge side fence 57 The pair 57 can be held at that position with an appropriate holding force.

With reference to FIG. 13, a description will be given of a configuration in which when the paper discharge end fence 58 is moved and adjusted in the double arrow direction of the paper discharge direction Xa, the paper discharge end fence 58 is held at that position with an appropriate holding force. Boss portions 58 a are integrally formed on the rear wall of the paper discharge side fence 57 at a plurality of locations in the paper width direction Y. An end fence connection bracket 96 is fastened to the paper discharge side fence 57 with screws 97 through the boss portions 58a.
The end fence connection bracket 96 is formed so as to extend from the boss portions 58a of the paper discharge side fence 57 through the escape grooves 52Aa and extend into the paper discharge tray 52A. An end fence rail bracket 98 that is slidably in contact with the back wall of the paper discharge tray 52A is attached and fixed to the lower portion of the end fence connecting bracket 96 so as to be movable in the double arrow directions of the paper width direction Y and the paper discharge direction Xa. . A slide cover 101 is fastened with screws 99 via a leaf spring 100 at a lower portion of the end fence connection bracket 96 than an attachment portion of the end fence rail bracket 98. Accordingly, when the paper discharge side fence 57 is moved and adjusted in the double arrow direction of the paper discharge direction Xa and / or the paper width direction Y, an appropriate biasing force of the leaf spring 99 acts on the upper end surface of the end fence rail bracket 98. As a result, the paper discharge end fence 58 can be held at that position with an appropriate holding force.

Next, the operation of the second embodiment will be described focusing on differences from the first embodiment.
As described above, the operation for adjusting the position of the paper discharge tray 52A in the paper width direction Y in accordance with the position of the paper feed tray 30 moved and adjusted in the paper width direction Y by the operator in the first embodiment. In the same manner as the operation using the same discharge table manual movement adjusting means 115 and control device 120 as described above, that is, “discharge tray 52” is set to “discharge tray 52A”, and “discharge tray support bracket 59” is set to “ Since it can be easily understood by simply replacing the “discharge tray support bracket 59A” and the “long hole 59e” with “the long hole 59Aa”, the description thereof will be omitted.

In the second embodiment, if the front end of the paper discharge P hits the paper discharge end fence 58 evenly due to the variation in the position of the print image with respect to the position where the paper feed tray 30 is moved and adjusted in the paper width direction Y. Therefore, there is a case where the discharge alignment to the discharge tray 52 is not good. In such a case, the operator uses the paper discharge end fence manual movement adjusting means 90 to adjust the position by moving the paper discharge end fence 58 alone in the paper width direction Y.
When the operator wants to adjust the position of the paper discharge end fence 58 in the paper width direction Y, the operator rotates the end fence moving dial 80 in an appropriate rotation direction. As a result, the rotational movement of the end fence moving dial 80 screwed with the screw shaft 82 is converted into a linear movement that moves the paper discharge end fence 58 in the paper width direction Y by the screw mechanism, and each screw shaft slider 85. At the same time, the end fence movement dial 80 rotates with respect to the screw shaft 82 that can move only in the direction of the double arrow in the paper discharge direction Xa, so that the side surface of the end fence movement dial 80 is substantially integrated with the paper discharge end fence 58. By pressing the discharge end fence 58 in the direction in which the discharge end fence 58 is moved in the paper width direction Y against either one of the two rib portions 83, the discharge end fence 58 itself rotates the rotation amount of the end fence moving dial 80. It moves according to (rotation angle). Accordingly, the paper discharge end fence 58 itself can be moved and adjusted in the paper width direction Y and held at a predetermined position.

  According to this embodiment, all the advantages and effects of the first embodiment similar to those described above can be obtained. In addition, by having the paper discharge end fence manual movement adjusting means 90 for manually moving and adjusting the paper discharge end fence 58 in the paper width direction Y, printed paper P (discharge paper P) discharged according to the print image area or the like is provided. ) Is unstable, it becomes possible to make adjustments including fine adjustment in the paper width direction Y by the paper discharge end fence 58 alone, stabilizing the state when the paper discharge P collides with the paper discharge end fence 58, The paper can be stacked in an orderly manner on the paper discharge tray 52A.

  The embodiment of the present invention is not limited to the second embodiment, but from the second embodiment, the paper feed tray position detection board 111, the paper discharge tray position detection board 116, the contacts 112 and 117, and functions related thereto. The control device 120 including the CPU 121 and the like related to the portion may be removed and eliminated (hereinafter referred to as “Modification 2”).

Further, the configuration is not limited to the second embodiment, and the configuration in which the paper discharge stand manual movement adjusting means 115 is removed from the configuration of the second embodiment, and the paper discharge end fence manual movement adjusting means 90 is provided (hereinafter referred to as this). (Referred to as “third embodiment”).
According to the third embodiment, the movement position of the discharge end fence 58 in the sheet width direction Y by the end fence moving dial 80 in accordance with the position adjustment on the sheet feeding tray 30 by the sheet feeding table moving mechanism 110. The position of the paper discharge P between the paper discharge side fences 57 is adjusted so that the paper discharge side fences 57 are shifted from the center in accordance with the position adjustment of the paper feed tray 30. The position of the paper P on the paper feed tray 30 and the positions of the paper discharge side fence pair 57 and the paper discharge end fence 58 on the paper discharge tray 52A coincide with each other, so that the quality of the paper discharge alignment can be maintained.

  The embodiment of the present invention is not limited to the third embodiment, but is related to the paper feed tray position detection board 111, the paper discharge tray position detection board 116, the contacts 112 and 117, and these from the third embodiment. A configuration in which the control device 120 including the CPU 121 and the like related to the functional part is removed may be used (hereinafter referred to as “Modification 3”).

  As described above, the present invention has been described with respect to specific embodiments and modifications. However, the configuration of the present invention is not limited to the above-described embodiments and modifications, and these may be combined as appropriate. It will be apparent to those skilled in the art that various embodiments, modifications, and examples can be configured within the scope of the present invention in accordance with the necessity, purpose, and application.

  The present invention is not limited to the stencil printing apparatus 1 as an example of the printing apparatus exemplified in the above-described embodiment and the like. For example, a printing cylinder (for example, shown in Japanese Patent No. 2790963 (JP-A-7-17013)) The present invention can also be applied to a printing apparatus configured to supply ink from the outside of the printing drum), an offset printing machine, and the like. In addition, the present invention can be applied to image forming apparatuses such as copying machines and printers.

1 is a schematic front view of an entire stencil printing apparatus showing a first embodiment of the present invention. FIG. 5 is a perspective view around a paper feed platform moving mechanism of a paper feed tray in the first embodiment. FIG. 3 is a bottom view of a sheet feeding table moving mechanism that shows a partially broken back side of a sheet feeding tray in FIG. 2. FIG. 5 is a perspective view around a discharge tray manual movement adjusting unit of a discharge tray in the first embodiment. FIG. 5 is a bottom view of a paper discharge table manual movement adjusting unit partially showing a rear side of the paper discharge tray in FIG. 4. FIG. 3 is a simplified cross-sectional view of a paper feed tray and a paper discharge tray showing a paper feed tray position detection board and its contacts, and a paper discharge tray position detection board and its contacts. FIG. 5 is a perspective view of a main part showing an engagement state of a paper feed tray position detection board and its contact, and a paper discharge tray position detection board and its contact. It is a block diagram which shows the control structure of the stencil printing apparatus in FIG. FIG. 9 is a perspective view around a discharge tray manual movement adjustment unit and a discharge end fence manual movement adjustment unit of a discharge tray according to a second embodiment. FIG. 10A is a plan view of the discharge tray manual movement adjusting means and the discharge end fence manual movement adjusting means of the discharge tray in FIG. 9, and FIG. FIG. 11 is a bottom view of a paper discharge end fence manual movement adjusting unit showing a part of the back side of the paper discharge tray in FIG. It is a perspective view which shows the principal part structure of the paper discharge end fence manual movement adjustment means of FIG. FIG. 11 is a cross-sectional view taken along line SA-SA in FIG.

Explanation of symbols

1 Stencil printing machine (an example of a printing machine)
DESCRIPTION OF SYMBOLS 2 Printing part 3 Plate making part 4 Paper feeding part 5 Ejection part 6 Paper discharge part 7 Image reading part 8 Plate cylinder 30 Paper feed tray (paper feed stand)
35 Feeding tray movement dial (feeding table movement adjusting means, feeding table moving mechanism)
52, 52A Discharge tray 57 Discharge side fence 58 Discharge end fence 59, 59A Discharge tray support bracket 59a Screw shaft tray movement dial (discharging tray manual movement adjustment means)
59c Discharge tray movement dial (discharge tray manual movement adjustment means)
90 Discharge end fence manual movement adjusting means 110 Paper feed table movement adjusting means, paper feed table moving mechanism 111 Paper feed tray position detection board (paper feed position detection means)
115 Discharge stand manual movement adjustment means 116 Discharge tray position detection board (discharge stand position detection means)
120 Control device (control means)
121 CPU (constitutes control means)
130 Operation panel 131 Liquid crystal display (notification means)
132 Buzzer (notification means)
P paper (printing paper, sheet-like recording medium)
X Paper transport direction Xa Paper discharge direction Y Paper width direction

Claims (5)

In a printing apparatus comprising a paper feed tray that is capable of stacking paper and being movable and adjustable in a paper width direction orthogonal to the paper transport direction, and a paper discharge tray on which printed paper is stacked.
A printing apparatus, comprising: a paper discharge table manual movement adjusting unit that manually adjusts the movement of the paper discharge table in the paper width direction according to the position of the paper feed table adjusted in the paper width direction. . The printing apparatus according to claim 1.
A paper discharge end fence for receiving the leading edge of the printed paper and aligning the paper is arranged on the paper discharge table,
A printing apparatus, comprising: a paper discharge end fence manual movement adjusting unit configured to manually move and adjust the paper discharge end fence in the paper width direction. A paper feed tray that can be loaded and adjusted in the paper width direction perpendicular to the paper transport direction, a paper discharge tray that stacks printed paper, and the leading edge of the printed paper are received and aligned. In a printing apparatus comprising a paper discharge end fence disposed on the paper discharge stand,
A printing apparatus, comprising: a paper discharge end fence manual movement adjusting unit configured to manually move and adjust the paper discharge end fence in the paper width direction. The printing apparatus according to any one of claims 1 to 3,
A paper feed table position detecting means for detecting a position of the paper feed table in the paper width direction;
A paper discharge tray position detecting means for detecting a position of the paper discharge tray in the paper width direction;
An informing means capable of informing an alignment state between a position in the paper width direction on the paper feed tray and a position in the paper width direction on the paper ejection stand;
Control means for causing the notifying means to notify the alignment state based on output signals from the paper feed position detecting means and the discharge position detecting means;
A printing apparatus comprising: The printing apparatus according to any one of claims 1 to 4,
The printing apparatus according to claim 1, wherein a paper discharge side fence that is manually movable in the paper width direction is arranged on the paper discharge stand so as to align side edges of printed paper.

Images