JP3281090B2 - Stencil printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper ejection device for a stencil printing machine, and more particularly, to a paper ejection device including a raised member that gives a curved view to a printing paper in a paper ejection process in a cross section orthogonal to the paper ejection direction. Things.

[0002]

2. Description of the Related Art In a stencil printing apparatus, printed printing paper is discharged from a printing section and stacked on a paper discharge table with a printed image surface as an upper surface.

When the leading edge of the printing paper hangs downward in the process of discharging the printing paper to the paper output tray, the printing paper is placed on the upper surface of the printing paper previously placed on the paper output tray, ie, the print image surface. , The printed image of the printing paper previously placed on the paper ejection tray is destroyed, so a raised member is provided in the middle of the paper ejection path that guides the printed printing paper to the paper ejection tray. By giving the printing paper a U-shaped or W-shaped curve when viewed in a cross section orthogonal to the paper discharging direction, the apparent rigidity of the printing paper in the paper discharging direction (front-back direction) is increased, and the paper is discharged. It has already been proposed to prevent the leading edge of the printing paper from hanging down in the process, for example, as described in JP-B-58-46428 and JP-A-60-1.
65347 and JP-A-61-217461.

[0004]

In order to prevent the leading edge of the printing paper from hanging down during the paper discharging process,
To effectively increase the apparent rigidity of the printing paper in the paper ejection direction, the type of printing paper, especially the paper thickness, etc. , and the printing
And preferred that the degree of curvature to be given to the printing paper in consideration of the rigidity of the printing paper itself (the stiffness of the paper itself) due to the size of the paper is set rather, of the discharge passage in response to this The height of the raised member provided midway should be variably set according to the type of printing paper.

For example, in the case of thin printing paper having a weak stiffness, the raised member should have a sufficient height so as to impart sufficient curvature to the printing paper to sufficiently increase its apparent rigidity in the paper discharging direction. It is necessary to have it, but the printing paper itself has rigidity, such as thick printing paper or A3 size printing paper, and the leading edge of the printing paper will be For printing paper that does not hang down, in other words, for printing paper that does not easily bend, it is not necessary to give the printing paper a special bend. If there is a relatively high raised members necessary for <br/> Me where Ru giving sufficient curvature, by which the printing paper is not curved, the print paper when the printing sheet passes a raised member on the sheet ejection path Conveying surface, for example, floating above the conveyor belt Ri, rather the paper discharge is not performed well.

On the other hand, in a conventionally known sheet discharging device, the raised member is fixedly arranged or can be detached and replaced. When the raised member is fixedly arranged, the raised member is not fixed. The height cannot be set variably. In the case where the protruding member is replaceable, the height of the protruding member is variably set by a user manually removing and replacing the protruding member. However, in this case,
Since the raised member can be freely removed and replaced by the user, if the replacement is not performed properly, the height of the raised member may not be set properly with respect to the type of printing paper, which may result in a bad result. is there.

In this case, since the raised member is manually replaced, the operation is troublesome, and the work load given to the user when using the stencil printing apparatus is increased. This is one factor that greatly reduces the evaluation of the printing apparatus.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional paper discharge device of a stencil printing apparatus, and does not require a manual operation of attaching and detaching and replacing a raised member. It is an object of the present invention to provide an improved stencil printing apparatus in which the height of the raised member is appropriately variably set in accordance with the type and size of the printing paper, so that stable paper discharging is always performed.

[0009]

SUMMARY OF THE INVENTION According to the present invention, there is provided, in accordance with the present invention, a device which is provided in a paper discharge path for guiding printed printing paper to a paper discharge table so as to be movable substantially vertically. , Arranged on both sides in the width direction to give a curvature to the printing paper in the paper discharging process when viewed in a cross section orthogonal to the paper discharging direction .
A main protruding member, which is disposed at a widthwise center side of the main protruding member;
Sub-elevation member, and a middle
A central raised member , the main raised member, the auxiliary raised member, and a middle raised member;
Central ridge members substantially each separately driven in a vertical direction the main
Drive means for selectively positioning the raised member, the auxiliary raised member, and the central raised member at least in one of two different positions in the vertical direction ; and capturing information on the type of printing paper and information on the size of the printing paper. , When the type of printing paper is thick paper, or for printing
When the size of the paper is the first size, the main raised portion
Material, auxiliary ridge and center ridge are all upward
Position on both sides in the width direction of the printing paper during the paper ejection process
Is slightly raised and curved into a flat U-shape.
Type is the standard paper, and the size of the printing paper is the first size.
Between the size and a second size smaller than the first size.
The main ridge member and the central ridge member upward.
Then, with the auxiliary ridge members positioned downward,
The printing paper in the process is curved in a W shape, and the type of printing paper is
Standard paper and the size of the printing paper is the second size
When smaller, the central raised member is
Position the raised members in the upward direction to indicate the paper ejection process.
And a control device for controlling the operation of the driving means so as to bend the printing paper into a U-shape .

The stencil printing apparatus according to the present invention has a paper type input operation section for inputting information relating to the type of printing paper, and the control device controls the printing performed by the paper type input operation section. The control device is configured to capture information about the type of paper or to detect information on the type of printing paper detected by the paper type detection unit. May be.

[0011]

In accordance with the such-described configuration, the control device takes in information about the type of printing paper from such paper type input operation unit, or the paper type detection means, the printing sheet Sa
By capturing information about the size of the paper and controlling the operation of the driving means in accordance with the type of printing paper, the driving means drives the movable ridge member substantially vertically, and the height position of the movable ridge member changes the height of the printing paper. It is set variably according to the type.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 1 shows an example of a stencil printing apparatus with a stencil making function to which a paper discharging apparatus according to the present invention is applied.
The stencil printing apparatus with a stencil making function shown in the figure is a stencil printing apparatus with a stencil reading unit 11,
And

The document reading section 11 has a line image sensor 17 for reading an image of a document conveyed in the sub-scanning direction, and a document feed roller 19.

The plate making section 13 includes a base paper roll section 21, a thermal head 23 composed of a plurality of point-like heating elements arranged in a row, base paper feed rollers 25 and 27, and base paper guide rollers 29 and 31. , 33, and a stencil cutter 35, and a plurality of dot heating elements of the thermal head 23 selectively and individually generate heat, thereby forming a heat-sensitive stencil sheet M on the heat-sensitive stencil sheet M in a dot matrix manner. Then, the stencil sheet M after stencil making is cut by the cutter 35.

The printing unit 15 has a perforated ink-permeable plate cylinder 37, an ink supply device 39 disposed inside the plate cylinder 37, and a press roller 41. The stencil sheet M after plate making is wound and mounted.

On one side of the printing unit 15, a paper feeding unit 43 is provided.
On the other side of the printing unit 15, a paper discharging unit 45 is provided.

The paper supply unit 43 includes a paper supply table 47 on which the print papers P are stacked and placed, a paper supply roller 48 and a separation roller 49 for taking out the print papers P one by one from the paper supply table 47,
It has a timing roller 51 for sending the printing paper P between the plate cylinder 37 and the press roller 41.

The paper discharging section 45 has a stripping claw 53 for peeling the printing paper P from the plate cylinder 37, a paper discharging device 55, and a paper discharging table 57 on which the printed printing paper P is stacked.

On one side of the printing unit 15, there is provided a plate discharging unit 63 including a plate discharging roller 61 for peeling a used stencil sheet M from the plate cylinder 37 and sending it into a plate discharging box 59.

In this stencil printing machine, the plate cylinder 37 is driven to rotate counterclockwise in the figure around its own central axis by a rotation driving means (not shown).
At a predetermined timing in synchronization with the rotation of the printing paper P, the printing paper P is supplied between the plate cylinder 37 and the press roller 41 by the timing roller 51 while moving from left to right in FIG. The stencil printing is performed on the printing paper P by pressing the P against the stencil sheet M wound around the outer peripheral surface of the plate cylinder 37 from the press roller 41. The printed printing paper P is stripped from the plate cylinder 37 by the stripping claw 53, and is discharged by the discharge device 55 to the discharge tray 5
7 and are stacked and placed on the paper output tray 57 with the print image surface facing upward.

The paper discharging device according to the present invention is the paper discharging device 5 described above.
5 and one embodiment of which is shown in FIGS. The paper discharge device 55 has a suction box 73 having a large number of suction holes 71 by negative pressure on the upper surface.

Pulley shafts 75 and 77 are provided at both ends of the suction box 73 in the paper discharge direction (the left and right direction in FIG. 4) so as to be rotatable in parallel with each other. Pulleys 79 and 81 are attached.
An endless belt 83 made of rubber or the like is wound around the three pulleys 79 and 81, respectively. Endless belt 8
3 are provided in parallel with each other at a central portion of the suction box 73 and on both left and right sides in a direction orthogonal to the sheet discharging direction, that is, in the width direction (hereinafter, this direction is referred to as the width direction). The upper span of each endless belt 83 extends at a small interval along the upper surface of the suction box 73, and
4 is driven in a clockwise direction in FIG. 4 by a driving device (not shown) to travel in the direction of arrow A along the upper surface of the suction box 73.

Although not shown, the endless belt 83 is provided with a number of small holes, and the suction holes 71 are provided in the endless belt 8.
3, the printing paper P that is placed on the upper span of the endless belt 83 and conveyed is conveyed while being pressed against the upper span of the endless belt 83 by negative pressure. You.

Left and right main raised members 85 are arranged on both sides in the width direction of the suction box 73 at the end side in the paper discharging direction. Each of the left and right main raised members 85 has a three-dimensionally inclined guide surface 87 having an upward slope as it goes to the end side in the paper discharging direction and outward as viewed in the width direction (the left and right direction in FIG. 3). One end is pivotally supported by a horizontal shaft 89 extending in the width direction so as to be able to rotate substantially vertically, and is urged by a torsion spring 91 counterclockwise as viewed in FIG.

A cam shaft 93 extending through the suction box 73 in the paper discharging direction is rotatably provided extending through the suction box 73 in the width direction. The member drive cam 95 is fixedly mounted. The main protruding member driving cams 95 respectively engage with cam engaging portions 97 provided integrally with the left and right main protruding members 85, and rotate the left and right main protruding members 85 by the rotation of the cam shaft 93 by solid lines in FIG. It is rotationally driven between the lower position shown and the upper position shown by a virtual line in FIG.

Left and right auxiliary ridges (auxiliary ridges) are located at positions adjacent to the center of the left and right main ridges 85 in the width direction.
Materials) 99 are arranged. Each of the left and right auxiliary raised plates 99 has an inclined guide upper surface 101 which is inclined upward toward the end side in the sheet discharging direction, and has one end extending in the width direction at one end.
03 is pivotally supported so as to be able to rotate substantially vertically.

A semi-circular auxiliary raised plate driving cam 105 is fixedly mounted on each of the left and right sides of the cam shaft 93. The auxiliary protruding plate driving cams 105 engage with cam engaging pieces 107 provided integrally with the left and right auxiliary protruding plates 99, respectively.
Rotation drives the left and right auxiliary raised plates 99 between the lowered position shown in FIG. 4 and the raised position shown in FIG.

A central raised roller (central raised member) is provided at the widthwise central portion of the suction box 73 at the end side in the paper discharging direction.
09 is arranged. The central raised roller 109 is located directly below the upper span of the endless belt 83 at the central position, and is rotatably supported by a roller support arm 113 by a pivot 111. The roller support arm 113 is a horizontal shaft extending in the width direction at the intermediate portion. The arm 115 is pivotally supported so as to be able to rotate substantially in the vertical direction, and is urged in a clockwise direction as viewed in FIG.

At the center of the cam shaft 93, a D-shaped roller support arm drive cam 119 is fixedly mounted. The roller support arm drive cam 119 is connected to the roller support arm 113.
, And the roller support arm 113 is rotationally driven between the lowered position shown in FIG. 4 and the raised position shown in FIG. 5 by the rotation of the cam shaft 93. . When the roller support arm 113 is located at the lowered position, the center raised roller 109 is located at a position separated from the upper span of the endless belt 83 at the center position as shown in FIG. 1
As shown in FIG. 5, the upper end of the endless belt 83 at the center position is lifted by the position of the upper end 13 as shown in FIG.

When the upper span of the endless belt 83 at the center is lifted by the roller support arm 113, the printing paper P in the paper discharging process is bent in a W-shape (see FIG. 8). An auxiliary suction hole 72 is provided between the endless belt 83 at the center position and the endless belts 83 on the left and right sides on the end side in the paper discharging direction of the box 73.

The main raised member driving cam 95, the auxiliary raised plate driving cam 105, and the roller supporting arm driving cam 119 are mounted on a cam shaft 93 with a predetermined rotational phase difference, and the cam shaft 93 is rotated at a first rotation angle. When in position, FIG.
When the main ridge member 85, the auxiliary ridge plate 99, and the roller support arm 113 are all located at the lowered position (first state) as shown in FIG. As shown in FIG. 5, the main raised member 85 and the roller support arm 113 are positioned at the raised position, and the auxiliary raised plate 99 is positioned at the lowered position (second state).
When the position 3 is in the third rotation angle position, as shown in FIG. 6, the main ridge member 85 and the auxiliary ridge plate 99 are positioned at the raised position, and the roller support arm 113 is positioned at the lowered position (third position). State).

A gear 123 is attached to the camshaft 93, and the gear 123 meshes with a gear 127 of the intermediate shaft 125. The intermediate shaft 125 is an endless belt 135 stretched over a pulley 129 attached to the intermediate shaft 125 and a pulley 133 attached to the worm wheel shaft 131.
, And is drivingly connected to the worm wheel shaft 131. The worm wheel shaft 131 has a worm wheel 1
37 is attached and the worm wheel 137
Engages with the worm 143 attached to the output shaft 141 of the cam drive motor 139,
9 is driven to rotate. Thus, the cam shaft 93 is selectively driven to rotate by the cam drive motor 139 to any one of the first rotation angle position, the second rotation angle position, and the third rotation angle position.

FIG. 7 shows an embodiment of a control system of the cam drive motor 139. This control system includes a CPU 201,
It includes a ROM 203 storing a data file of an operation command of the cam drive motor 139 and a system program defined in advance according to a paper type and a paper size, and a RAM 205 for storing input information as needed.

In this case, the operation command of the cam drive motor 139 is, for example, as shown in FIG. 8, the printing paper P is a standard paper of a general basis weight and the paper size is A3 size.
In the case of (first size) , the first state is that the type of the printing paper P is standard paper having a general basis weight, and the paper size is smaller than A3 size and larger than A4 size (second size). In the case, the second state is that the type of the printing paper P is standard paper having a general basis weight, and when the paper size is smaller than A4 size, the third state is that the type of the printing paper P is In the case of thick paper, the first state is determined to be set regardless of the paper size. The first state, the first
The division between the second state and the third state is not necessarily as shown in FIG.
Paper size is not limited to A3 size or A4 size
The appropriate boundary varies depending on the thickness and quality of the printing paper P.
Things.

The CPU 201 has a paper type input key 14 as a paper type input operation unit provided on the operation panel 145.
7, information on the paper type of the printing paper P, the paper size input key 149 or the paper size detection device 15
1, information about the paper size of the printing paper P is fetched and stored in the RAM 205, and the operation command of the cam drive motor 139 according to the type and size of the printing paper P is read from the data file stored in the ROM 203. The read operation command of the cam drive motor 139 is output to the motor drive circuit 153 of the cam drive motor 139, and the two limit switches 157 and 159 which are turned on / off by a switch operation cam 155 attached to the cam shaft 93 are read. An on / off signal is given, and the combination of the on / off signals from the two limit switches 157 and 159 causes the camshaft 93 to move to any one of the first rotation angle position, the second rotation angle position, and the third rotation angle position. Identifies that the rotation has been displaced to any of the rotation angle positions, and provides feedback control Controlling the rotation of the arm shaft 93.

Accordingly, the cam drive motor 139 determines the type of the printing paper P input by the paper type input key 147 and the size of the printing paper P input by the paper size input key 149 or detected by the paper size detecting device 151. And rotates the cam shaft 93 to any one of the first rotation angle position, the second rotation angle position, and the third rotation angle position according to the type and size of the printing paper P. I do.

The rotation of the cam shaft 93 causes the type of the printing paper P input by the paper type input key 147 and the size of the printing paper P input by the paper size input key 149 or detected by the paper size detecting device 151. In a first state in which all of the main raised member 85, the auxiliary raised plate 99, the roller support arm 113, and the central raised roller 109 are located at the lowered position, as shown in FIG. As shown in FIG. 6, the main raised member 85, the roller support arm 113, and the central raised roller 109 are located at the raised position, and the auxiliary raised plate 99 is located at the lowered position, or as shown in FIG. Member 8
5 and the auxiliary raised plate 99 are located at the raised position, and any one of the third states in which the roller support arm 113 and the central raised roller 109 are located at the lowered position is obtained.

With this, the user simply inputs the type of the printing paper P to be used by operating the paper type input key 147 of the operation panel 145, and the main ridge member 85 and the auxiliary ridges according to the type of the printing paper P to be used. The height positions of the plate 99, the roller support arm 113, and the central raised roller 109 are appropriately set. Further, in this embodiment, the user sets the size of the printing paper P to be used by pressing the paper size input key 149 on the operation panel 145. By inputting by operation or by detecting the size of the printing paper P by the paper size detecting device 151, the main ridge member 85, the auxiliary ridge plate 99, and the roller support arm are selected according to the size and the type of the printing paper P to be used. The height positions of the roller 113 and the central raised roller 109 are appropriately set, so that the paper is always stably discharged.

The paper size detecting device 151 may detect the size of the print paper P in the paper supply section 43 or in the process of paper supply and paper discharge by a photoelectric method or the like. In this case, any method may be used as long as the type of the cassette is detected by a photoelectric method, a magnet method, or the like.

FIG. 9 shows another embodiment of the control system of the sheet discharging device according to the present invention. In this embodiment, a paper type detecting device 161 for detecting the type of the printing paper P is provided, and the CPU 201 sends information on the type of the printing paper P from the paper type detecting device 161 and the paper size input key 149 or Information about the paper size of the printing paper P is fetched from the paper size detecting device 151 and stored in the RAM 205, and the operation command of the cam drive motor 139 corresponding to the type and size of the printing paper P is transmitted to the RO.
It reads from the data file stored in M203, and outputs the read operation command of the cam drive motor 139 to the motor drive circuit 153 of the cam drive motor 139.

The paper type detection device 161 is provided in the sheet feeding unit 43, examples of which are illustrated in Figure 10. The paper type detection device 161 includes a limit switch 165 that is turned on and off in accordance with a switching position of a paper supply pressure switching lever 163 provided in the paper supply unit 43.

The paper feed pressure switching lever 163 is moved between a standard paper position shown by a solid line in the drawing and a thick paper position shown by a virtual line in the drawing from a support plate 167 fixedly arranged by a pivot 165. It is rotatably mounted and, when positioned at the cardboard position, contacts the actuator 166 of the limit switch 165 to switch the limit switch 165.

One end of a tension coil spring 169 for setting the sheet pressure is locked to the sheet pressure switching lever 163.
The other end of the tension coil spring 169 is locked by a rotation lever 173 rotatably mounted on a pivot 171 at the other end, and the paper supply pressure switching lever 163 is switched from the standard paper position to the thick paper position and rotated. In the figure given to the rotating lever 173, the spring force in the clockwise direction is increased,
In the drawing, a roller support 179 that is tiltably supported in a vertical direction by a support shaft 175 also supporting the paper feed roller 48 and rotatably supports the paper supply roller 48 by a roller shaft 177 is provided in a counterclockwise direction, that is, a downward direction. The power (feed pressure) is increased to a value suitable for feeding thick paper.

In this embodiment, the user sets the paper feed pressure by switching the paper feed pressure switching lever 163 in accordance with the type of printing paper P to be used, that is, whether it is standard paper or thick paper. Only when the limit switch 165 corresponding to this is turned on / off, the paper type information becomes CP.
The main ridge member 85, the auxiliary ridge plate 99, the roller support arm 113, and the central ridge roller 109 are input to U <b> 201 and are used in accordance with the type of the printing paper P used without the user performing a special operation only for the paper discharging operation. Height positions are set appropriately, and stable paper ejection is always performed.

In each of the above embodiments, the main raised member 85, the auxiliary raised plate 99, the roller support arm 11
3 and the central raised roller 109 are each positioned at either the ascending position or the descending position. However, these may be position-controlled in multiple stages including an intermediate position according to the type of paper. The position of the main ridge member 85, the auxiliary ridge plate 99, the roller support arm 113, and the center ridge roller 109 may be individually controlled by individual servo motors .

[0047]

As can be understood from the above description, according to the stencil printing apparatus discharge apparatus of the present invention, the control device such as the CPU performs printing by the paper type input key on the operation panel or the paper type detection device. Import paper type information and print paper size information
By controlling the operation of the driving means according to the type and size of the printing paper, the driving means drives the movable ridge member substantially vertically, and the height position of the movable ridge member indicates the type of printing paper. Variably set according to the size and size , so that the proper amount of curvature is always applied to the printing paper according to the type of printing paper without the need for manual replacement of the raised member, which is a troublesome operation , And stable and excellent discharge is always performed regardless of the type of print paper.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of a stencil printing apparatus with a stencil making function to which a paper ejection device according to the present invention is applied.

FIG. 2 is a plan view showing one embodiment of a paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 3 is a front view showing an embodiment of a paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 4 is a side view showing a first state of the sheet discharging device of the stencil printing apparatus according to the present invention.

FIG. 5 is a side view showing a second state of the sheet discharging device of the stencil printing apparatus according to the present invention.

FIG. 6 is a side view showing a third state of the sheet discharging device of the stencil printing apparatus according to the present invention.

FIG. 7 is a block diagram showing an embodiment of a control system of a paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 8 is an explanatory diagram showing an operation example of the paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 9 is a block diagram showing another embodiment of the control system of the paper discharge device of the stencil printing apparatus according to the present invention.

FIG. 10 is a side view showing an embodiment of a sheet feeder provided with a sheet type detecting device used in the sheet discharging device of the stencil printing apparatus according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 original reading unit 13 plate making unit 15 printing unit 37 plate cylinder 41 press roller 43 paper feeding unit 45 paper discharging unit 47 paper feeding table 53 stripping claw 55 paper discharging device 57 paper discharging table 63 plate discharging unit 73 suction box 71 suction hole 83 endless Belt 85 Main ridge member 93 Cam shaft 95 Main ridge member drive cam 99 Auxiliary ridge plate 105 Auxiliary ridge plate drive cam 109 Central ridge roller 113 Roller support arm 119 Roller support arm drive cam 139 Cam drive motor 147 Paper type input key 161 Paper type Detector 165 Limit switch

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-144335 (JP, A) JP-A 64-29345 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41L 13/04 B41F 21/00 B65H 7/02 B65H 29/70

Claims (3)

(57) [Claims] 1. A substantially each movably disposed in the vertical direction in the middle of the discharge passage for guiding the printed printing paper to the discharge tray, a cross section perpendicular to the discharge direction on the printing paper sheet discharge process Placed on both sides in the width direction to give a curvature to look at
Main ridge member, which is disposed at the center in the width direction of the main ridge member.
Sub-elevated member, and arranged at the center in the width direction
A central ridge member, said main ridge member, the auxiliary ridges members and the central ridge member substantially each separately driven in a vertical direction the main ridge member, the auxiliary
Driving means for selectively positioning the raised member and the central raised member at least in one of two positions different from each other in the vertical direction; and information on the type of printing paper and the size of the printing paper.
Information about the type of printing paper is thick
Or if the size of the printing paper is the first size
The main ridge, the auxiliary ridge and the central ridge.
Marks the paper ejection process without any material being positioned upwards
Curved in a flat U-shape with both sides in the width direction of the printing paper slightly elevated
The print paper type is standard paper, and the print paper type is
Size is smaller than the first size and the first size.
2, the main raised member and the middle
Center ridge up, auxiliary ridge down
And the printing paper in the paper discharging process is curved in a W-shape.
Make sure that the type of printing paper is
Is smaller than the second size.
Position the member downward and the auxiliary raised member upward
So that the printing paper in the paper discharging process is curved into a U-shape.
And a control device for controlling the operation of the driving means. 2. A printing apparatus according to claim 1, further comprising a paper type input operation section for inputting information on a type of printing paper, wherein said control device is configured to take in information on the type of printing paper input from said paper type input operation section. The paper discharge device for a stencil printing device according to claim 1, wherein: 3. The printing apparatus according to claim 2, further comprising a paper type detecting unit configured to detect a type of the printing paper, wherein the control unit is configured to take in information on the type of the printing paper detected by the paper type detecting unit. The paper discharge device for a stencil printing device according to claim 1.