JPH05318903A - Device of screen printing machine - Google Patents

Abstract

PURPOSE:To provide a device for discharging a stencil for a screen printing machine stably performing taking-up operation capable of certainly performing winding at the time of the start of the taking-up of stencil paper to be discharged and taking up a large amount of stencil papers. CONSTITUTION:A plate cylinder 5 is rotated in the direction opposite to that at the time of discharging stencil paper 6, and the stencil paper released and fed from the plate cylinder 5 by discharging rollers 14, 15 is taken up from the rear end thereof by a taking-up pipe 21 and the stencil paper taken up by the taking-up pipe 21 is pressed by a press roller 19 and the taking-up pipe 21 is rotationally driven by a pipe attaching rod 20 through a torque limiter to take up the stencil paper at an almost constant speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate discharging device for a stencil printing machine.

[0002]

2. Description of the Related Art Generally, a stencil printing machine winds a perforated base paper around a porous cylindrical plate cylinder, supplies ink from an inner surface of the plate cylinder by an ink supply member, and causes the ink to exude through the perforations of the base paper. The ink is pressed against the paper to perform printing. Therefore, in this type of stencil printing machine, when performing the next printing, it is necessary to separate the used base paper wound around the plate cylinder from the plate cylinder and discard it. However, on both sides of the used base paper peeled off from this plate cylinder (especially the back surface that was in contact with the plate cylinder), almost the entire surface was supplied from the plate cylinder except for the tip part clamped by the clamper. Due to the adhered ink, if the discarding work of the base paper is manually performed, the work itself is difficult and there is a high possibility that the hands and clothes are significantly contaminated. Therefore, in this type of conventional stencil printing machine, usually, after opening and closing the clamper of the plate cylinder, while rotating the plate cylinder, the end of the base paper (on the clamper side) is rotated by a member called a plate ejection claw.
Is peeled from the plate cylinder and guided, and the peeled base paper is sandwiched and conveyed by a plate discharge roller or the like and dropped into the plate discharge box.
The stencil sheet is processed by a stencil sheet discharging device configured to crush the stencil sheet dropped in the stencil sheet box with a compression plate or the like.

FIG. 3 shows an example of a plate discharge device of this conventional stencil printing machine. In FIG. 3, the plate cylinder 5 formed of a porous material in a cylindrical shape is rotated counterclockwise by a driving means (motor or the like) not shown, with the ink supply pipe 1 supported by a flange or the like not shown as a spindle. Driven to rotate. Inside the plate cylinder 5, an ink roller 2 which is rotationally driven in the same direction as the plate cylinder 5 by a gear or the like is supported by a side plate (not shown). Further, a doctor roller 3 is arranged around the ink roller 2 with a slight clearance from the ink roller 2. The doctor roller 3 uniformly supplies the ink in the ink reservoir 4 onto the peripheral surface of the ink roller 2. On the other hand, on the outer peripheral surface of the plate cylinder 5, a clamper 7 for holding the front end of the base paper 6 and winding the base paper 6 on the peripheral surface of the plate cylinder 5 is arranged. Further, around the plate cylinder 5, the registration roller 13 that conveys the paper P fed by a paper feeding / separating device (not shown) toward the peripheral surface of the plate cylinder 5 is wound around the plate cylinder 5. A press roller 12 rotatably supported by the base paper 6 is provided, and a peeling claw 30 that contacts and separates the base paper 6 wound around the plate cylinder 5 is provided.

In FIG. 3, when the registration roller 13 conveys the paper P toward the peripheral surface of the plate cylinder 5, the holding member (not shown) is released and the press roller 12 moves from its standby position, The paper P is rotated while being pressed against the base paper 6 wound on the plate cylinder 5. As a result, ink is supplied from the ink reservoir 4 to the substantially entire rear surface of the base paper 6 clamped by the clamper 7 from the inner surface of the plate cylinder 5 by the ink roller 2, and bleeds through the perforations of the base paper 6. The ink 5 is pressed against the paper P and printed. The printed paper P is peeled from the base paper 6 by the peeling claw 30 that moves from the standby position and lightly abuts the plate cylinder 5 similarly to the press roller 12, and the paper discharge tray 3
1 is discharged and loaded on top.

On the other hand, the above printing is repeated,
The unnecessary printed base paper 6 is automatically discharged by the plate discharging device. When another base paper is to be printed subsequently, the next new base paper is fed toward the plate cylinder 5 by an automatic plate feeder (not shown), and the leading end of the base paper is clamped by the clamper 7. When the plate cylinder 5 rotates while being clamped, the plate cylinder 5 is automatically wound around the peripheral surface of the plate cylinder 5. As shown in FIG. 3, the conventional plate discharging device is composed of a plate discharging claw 8, a pair of plate discharging rollers 9, a compression plate 10, a plate discharging box 11 and the like. Eject 6 That is, in FIG. 3, when the plate discharge operation is started, first, the plate cylinder 5 is rotated at a low speed, and the rotation of the plate cylinder 5 is stopped at a position where the clamper 7 faces the vicinity of the plate discharge claw 8. It And
In this state, the clamper 7 of the plate cylinder 5 is opened to the position indicated by the broken line by a clamper opening / closing member (not shown), and the front end of the printed base paper 6 is released from the plate cylinder 5. Then
The plate ejection claw 8 moves from its standby position (the position indicated by the broken line in FIG. 3) to the plate ejection position that is close to the plate cylinder 5 (the position indicated by the solid line in FIG. 3), and in this state, the plate cylinder 5 rotates in the same direction as during printing. To be done. As a result, the printed paper 6 is guided by the leading edge side of the plate ejection claw 8 and is sequentially peeled off from the plate cylinder 5. The base paper 6 thus separated from the plate cylinder 5 is nipped and conveyed by a pair of plate discharge rollers 9 which rotate at a peripheral speed substantially equal to the moving speed of the base paper 6, and is dropped into the plate discharge box 11. Then, when the transport of the base paper 6 by the plate discharge roller 9 is completed, the compression plate 10 arranged so as to be movable up and down with respect to the plate discharge box 11 descends toward the plate discharge box 11 and drops into the plate discharge box 11. The inserted base paper 6 is crushed.

[0006]

By the way, in the conventional plate discharging apparatus, the base paper 6 discharged in the plate discharging box 11 is used.
When the sheet discharge amount becomes full, the plate discharge base paper inside the plate discharge box 11 itself blocks the plate discharge path, and disturbs the plate discharge of the succeeding plate discharge base paper to generate a plate discharge jam. Therefore, in this conventional plate discharge device, in order to prevent the occurrence of the plate discharge jam as described above, a full sensor for detecting the amount of the plate discharge paper in the plate discharge box 11 and notifying the operator of the possibility of the plate discharge operation is installed. Has been.

However, in this conventional plate discharge device,
The stencil sheet 6 dropped in the plate discharge box 11 is not necessarily folded and crushed as shown in FIG. 3, and even when the stencil sheet 6 is squeezed when the compression plate 10 is descending. In the state where the compression plate 10 is raised in preparation for the next plate discharge and returned to its standby position, the base paper 6 is expanded more than when it is crushed by its elasticity. Therefore, it is preferable that the number of sheets of the stencil sheet 6 discharged in the plate discharge box 11 is small, but as the number of sheets of the stencil sheet discharge paper increases, the expansion in the plate discharge box 11 also increases. In the plate discharging apparatus, although the plate discharging paper 11 can actually be sufficiently accommodated in the plate discharging box 11, the plate discharging path is blocked by the expansion of the plate discharging sheet, and the plate discharging of the succeeding sheet 6 is performed. Jam is liable to occur, and the full sensor immediately operates to interrupt the plate discharge operation. Although the plate discharge allowable amount of the plate discharge base paper until the full sensor operates in the conventional plate discharge device varies depending on the size of the plate discharge box 11, it is not possible to increase only the ratio of the plate discharge box 11 to the entire device. Since it causes new problems such as increase in size and cost, it is usually about 20 to 30 sheets.
For this reason, for example, when printing is performed such that the number of plates (the number of base paper 6) is large and the number of prints per plate is small, in the conventional plate discharging device, the full sensor is not operated during the printing. Since it is frequently operated, it is necessary to open the cover of the apparatus main body, take out the plate discharge box 11, and perform the work of discarding the plate discharge base paper each time. Therefore, in the above-mentioned conventional plate discharge device, the work of discarding the plate discharge base paper is troublesome, and as described above, the frequent operation of the full sensor to interrupt the operation of the device means that the original operation of the device is normal. Even such an operation may cause a decrease in the reliability of the user for the entire device.

On the other hand, as a stencil ejecting device having another structure of this type of stencil printing machine, for example, as shown in Japanese Patent Publication No. 1-23788, the front end portion of the stencil (the stencil clamped by the clamper is A printing machine has been proposed in which the printed base paper, which is separated from the circumferential surface of the plate cylinder by the leader portion) and conveyed, is wound around the paper core of the roll-shaped base paper that is no longer needed. However, as is clear from FIG. 3, this type of stencil printing machine, as is well known, prints on the paper P in the leader portion of the stencil sheet that starts winding on the paper tube. At this time, since the press roller 12 does not press, the ink is not attached to the back side of the base paper 6 wound around the plate cylinder 5. Therefore, as described above, when the used base paper is wound around the paper core from the leader, the paper core and the discharged base paper are liable to slip. It will be difficult to wrap the original paper leader section of Therefore, in this conventional printing machine, a double-sided tape is attached in advance on the peripheral surface of the paper tube,
By adhering the leader portion of the discharged sheet raw paper to the paper core, the winding of the leader portion of the discharged sheet raw paper around the paper tube is ensured. However, in this conventional printing machine, the leader portion of the first stencil sheet that is directly wound around the paper core is directly adhered to the peripheral surface of the paper core by the above-mentioned double-sided tape, so that the paper is wound around the paper core. However, since the second and subsequent succeeding stencil sheets are wound by using the adhesive force of the ink adhering to the back surface of the stencil sheet, the stencil sheet is first wound on the paper tube. The leader of the succeeding stencil sheet is slippery with respect to the stencil sheet being taken,
Adhesion of the leader portion of the second and subsequent sheets to the stencil discharged stencil paper wound earlier became unstable, and a mistake in winding the stencil discharged stencil paper sometimes occurred.

[0009] Further, as a plate discharging device of still another configuration of this type of stencil printing machine, for example, Japanese Patent Laid-Open No. 59-15508.
As disclosed in Japanese Patent Publication No. 6, a device is proposed in which a plurality of belts stretched between a plurality of rollers are used to hold and rotate a winding core, and the stencil sheet is wound around the peripheral surface of the winding core. Has been done. In this conventional plate discharge winding device, since the leader portion of the plate discharge paper is wound around the peripheral surface of the core while being guided by the belt, the occurrence ratio of the former discharge error of the plate discharge paper is reduced. However, because the tension of the belt varies due to the winding thickening of the core, the core does not rotate on the ideal axis line, and easily swings to the left and right. At the time of winding, the stencil sheet is folded and overlapped, and the actual winding amount of the stencil sheet on the winding core is considerably smaller than the allowable winding amount, and the structure of the apparatus itself is complicated and expensive. there were.

The present invention has been made in view of the above-mentioned points, and an object of the present invention is to reliably perform winding of a discharged master paper at the start of winding and to wind a large amount of the discharged master paper. An object of the present invention is to provide a stencil ejector for a stencil printing machine in which the winding operation is stable and can be taken.

[0011]

In order to solve the above-mentioned problems, the present invention is perforated and wound around a porous cylindrical plate cylinder and pressed against the plate cylinder by a pressing member composed of a press roller. By pressing the ink that has exuded from the inner surface of the plate cylinder through the perforations onto the paper, the printed base paper that has been printed is automatically peeled from the plate cylinder and discarded. A plate discharge device of a stencil printing machine, which comprises a plate cylinder driving means for rotating the plate cylinder in a plate discharge direction opposite to that at the time of printing of the base paper, and a pair of plate discharge rollers for rotating in the plate discharge direction. The base paper is pinched and conveyed from the rear end side of the base paper by contacting and separating a plate discharge roller located on the downstream side of the plate cylinder in the rotation direction of the plate cylinder, and the base paper wound around the plate cylinder is peeled from the plate cylinder. Peeling and conveying means,
A take-up pipe for taking up the base paper peeled from the plate cylinder by the peeling / conveying means from the rear end side of the base paper with the printing surface of the base paper being the front side, and the take-up pipe is supported via a torque limiter and in the roll-up direction of the base paper. A pipe mounting rod that drives and rotates the winding pipe, and a pressing roller that is pressed against the surface of the raw paper wound on the winding pipe and is driven and rotated in the winding direction of the raw paper are provided.

[0012]

According to the present invention, the plate cylinder driving means rotates the plate cylinder in the plate discharge direction opposite to that during printing when the base paper is discharged, so that the plate cylinder is peeled and conveyed by the plate discharge roller. The discharged stencil sheet is wound on the winding pipe from the rear end side, and the discharged stencil sheet wound on the winding pipe is pressed by the pressing roller,
In addition, since the winding pipe for winding the stencil sheet is rotatably driven by the pipe mounting rod through the torque limiter, the stencil sheet is wound at a substantially constant speed.

[0013]

Embodiments of the present invention will now be described in detail with reference to the drawings. However, with respect to the configuration, operation, and the like within the range that can be clearly recalled from the description of the present embodiment, their illustration and disclosure will be omitted or simplified in order to avoid complication of the description.

Among the components of the plate discharge device of the stencil printing machine of the present embodiment shown in FIG. 1, the same or substantially the same function as the components of the plate discharge device of the conventional stencil printer shown in FIG. The members having the same configurations are given the same reference numerals and detailed description thereof will be omitted. Further, the configuration and operation of the members involved in printing on the paper P in the plate discharge device of the stencil printing machine of the present embodiment are substantially the same as those of the above-mentioned conventional one, and therefore detailed description thereof will be omitted.

As shown in FIG. 1, the plate discharge device of this embodiment includes a plate cylinder driving means for rotating the plate cylinder 5 in the plate discharge direction opposite to the above-described printing when the base paper 6 is discharged, and a pair of plate discharge rollers 1.
The stencil discharge roller 15 located on the downstream side in the rotation direction of the plate cylinder 5 is brought into contact with and separated from the plate cylinder 5 which is composed of Nos. 4 and 15 and rotates in the plate discharge direction. A peeling / conveying means for peeling the raw paper 6 wound around the cylinder 5 from the plate cylinder 5, and a winding for winding the raw paper 6 peeled from the plate cylinder 5 by the peeling / conveying means from the rear end side of the raw paper with the printing surface of the raw paper facing up. A take-up pipe 21 and a pipe mounting rod 2 for supporting the take-up pipe 21 via a torque limiter and drivingly rotating the take-up pipe 21 in the take-up direction of the base paper.
0, a pressing roller 19 which is pressed against the surface of the base paper 6 wound around the winding pipe 21 and driven to rotate in the winding direction of the base paper, and a pipe mounting rod 20 for the pressing roller 19
And a pressing solenoid 26 for contacting and separating the sheet, and operates in the following manner to eject the printed base paper 6.

That is, in FIG. 1, as described above, when the predetermined printing of the base paper 6 wound around the plate cylinder 5 is completed and the plate discharging operation is started, first, the plate cylinder driving means is operated. Then, the plate cylinder 5 is rotated in the plate discharge direction opposite to that at the time of printing. Here, the plate cylinder drive means is composed of a plate cylinder drive system such as a drive motor or a drive gear (not shown) for the plate cylinder 5, and has a function of appropriately switching the rotation direction and the rotation speed of the plate cylinder 5. There is.

As shown in FIG. 2, when the plate cylinder 5 is rotated in the direction opposite to that at the time of printing, substantially at the same time, the plate discharge unit driving means composed of a motor, a gear and the like (not shown) starts to operate. , The plate discharge rollers 14 and 15, the pressing roller 19, and the pipe mounting rod 20 are rotated in the directions of the arrows in FIG. Here, the peripheral speed of each of the plate discharge rollers 14 and 15, the presser roller 19, and the pipe mounting rod 20 is the plate discharge speed of the base paper 6, that is, the peripheral speed when the plate cylinder 5 rotates in the reverse direction (during plate discharge operation). The settings are almost the same.
In addition, the pipe mounting rod 20 is detachable along the direction of its rotation axis so that the winding pipe 2 is detachable.
1 has been inserted in advance. This pipe mounting rod 20
The take-up pipe support portion of is composed of a plurality of protrusions, which increases the frictional force with respect to the inserted take-up pipe 21 and facilitates the insertion and removal of the take-up pipe 20. .

On the other hand, at the same time as the above-mentioned plate discharge portion driving means is operated, as shown in FIG.
Is excited. By the excitation of the pressing solenoid 26, the swing arm 22 is swung in the clockwise direction around the swing arm shaft 22a in FIG. 1 via the link 25 and the pressing arm 23. As a result, the pipe mounting rod 20, which is rotatably supported by the swinging end of the swing arm 22, is attached to the pressing roller 1.
9, the peripheral surface of the winding pipe 21 inserted into the pipe mounting rod 20 is pressed against the pressing roller 19 and driven and rotated in the arrow direction.

Then, as shown in FIG. 1, when the plate cylinder sensor 28 is turned on by the shield plate 27 which is rotated in synchronization with the rotation of the plate cylinder 5 by the reverse rotation of the plate cylinder 5, the plate cylinder sensor 28 is rotated in the plate discharge direction. The plate discharge roller 15 located on the downstream side of the plate cylinder 5 in the rotational direction of the plate cylinder moves to the position of the broken line in FIG. 1 and contacts the outer peripheral surface of the plate cylinder 5. In this state, when the plate cylinder 5 further rotates in the reverse direction, the plate discharge roller 15 is rotated in a direction against the rotation of the plate cylinder 5 while contacting the outer peripheral surface of the plate cylinder 5.
The rear end of the base paper 6 wound around the plate cylinder 5 is brought into contact with the peripheral surface of the base paper 5, and the rotation of the plate discharge roller 15 causes the base paper 6 to rotate.
The rear end of the plate cylinder 5 is picked up from the peripheral surface of the plate cylinder 5 and guided toward the nip portion of the pair of plate discharge rollers 14 and 15.

Next, the rear end portion of the base paper 6 held in the nip portion of the plate discharging rollers 14 and 15 has the respective plate discharging rollers 1.
The take-up pipe 21 is crocodile without being wound around the plate discharge roller 15 by the plate discharge belt 18 which is wound around the plate discharge rollers 16 and 17 in contact with each other and driven to rotate. It is transported toward. This allows
When the plate discharge sensor 29 arranged near the plate discharge path of the plate discharge belt 18 detects the rear end of the base paper 6 discharged and conveyed as described above, the plate discharge roller 15 on the downstream side is in the original position (see FIG. 1 (solid line position) and is continuously rotated at this return position.

In this way, the base paper 6 which is discharged and conveyed in synchronization with the reverse rotation of the plate cylinder 5 and which is peeled off sequentially from the peripheral surface of the plate cylinder 5 has its rear end being the take-up pipe 21 and the pressing roller 1.
By inserting the base paper 6 into the winding pipe 21, the winding pipe 21 can be reliably and smoothly wound around the winding pipe 21. In other words, since the rear end of the base paper 6 has ink adhered all the way to the rear end thereof, the plate is discharged from the rear end of the base paper 6 and wound around the take-up pipe 21 as described above. As a result, as compared with the case where the plate is ejected from the front end side of the base paper 6 having a large area where ink is not adhered as in the conventional example, the adhesiveness of the ink adhered to the back surface of the base paper 6 to the winding pipe 21 is increased. Good winding pipe 2
The base paper 6 can be reliably and smoothly wound around the 1.

On the other hand, when the plate discharge sensor 29 is turned on, a clamper opening / closing member (not shown) for opening / closing the clamper 7 is actuated, and in FIG. 1, the plate cylinder 5 is at a predetermined position (the clamper 7 is a plate discharge roller). Around 15
When the clamper opening / closing member is rotated backward, the clamper opening / closing member engages with a clamper opening / closing arm (not shown) provided on the clamper 7, the clamper 7 is slightly opened, and the leading end of the base paper 6 is removed from the clamper 7. It will be released. Then, the plate cylinder 5 is further rotated from this position, and the notch portion of the shield plate 27 corresponds to the plate cylinder sensor 28 to turn off the plate cylinder sensor 28, whereby the rotation of the plate cylinder 5 is stopped.

Further, the base paper 6 which is being discharged and conveyed while being wound on the winding pipe 21 is further conveyed, and the front end of the base paper 6 released from the clamper 7 passes through the plate discharge sensor 29, and the plate discharge sensor 29 is When it is turned off, the clamper opening / closing member is returned to the original position, and as shown in FIG. 2, the operation of the drive system of the plate discharge portion is stopped with a slight delay from this timing, and the pressing solenoid 26 Is turned off, and the peripheral surface of the discharged base paper wound on the winding pipe 21 is separated from the peripheral surface of the pressing roller 19, and the winding of the base paper 6 is completed. As is clear here, in the plate discharge device of the present embodiment, when the drive system of the plate discharge portion is stopped (a state other than during the plate discharge operation of the base paper 6), the base paper 6 wound on the winding pipe 21, Since the pressing roller 19 and the pressing roller 19 are separated from each other, useless ink is prevented from adhering to the pressing roller 19, and the problem that the pressing roller 19 winds around the pressing roller 19 when the base paper 6 is discharged can be prevented. Further, in this embodiment, the winding pipe 21 can be inserted into and removed from the pipe mounting rod 20 in the direction along the rotation axis thereof only by providing the apparatus main body with a small opening / closing portion for attaching and detaching the winding pipe. Therefore, it is not necessary to open and close the cover of the entire plate discharge device to attach and detach the cover, and the surface of the base paper 6 wound around the take-up pipe 21 is the front end side of the base paper on which no ink is attached. The hands can be easily attached and detached without being soiled by the attaching and detaching operation.

Here, the discharged stencil sheet is sequentially wound on the winding pipe 21, and the winding diameter thereof is gradually increased, whereby the swing arm 22 and the swing arm shaft 22a.
1, the pressing arm 23 is swung in the counterclockwise direction in FIG. 1, and the swing amount of the pressing arm 23, that is, the winding amount of the discharged master paper around the winding pipe 21 is set in advance. When the allowable amount is reached, the fullness detection sensor 24 which is operated according to the swing amount of the pressing arm 23 is turned on, and the fullness indication is displayed as shown by the chain line in FIG.

[0025]

According to the present invention, since the discharged stencil sheet is wound up, an extremely large amount of the stencil sheet can be discharged as compared with the conventional crushing method, and the frequency of its disposal can be reduced.

Further, according to the present invention, the adhesive force of the ink adhering to the rear end of the base paper is used to discharge the base paper from the rear end side and wind it up. Therefore, at the start of winding the base paper. Since there is no slippage of the end of the base paper or winding jam, the base paper can be reliably wound around the winding pipe.

Further, according to the present invention, since the change of the winding peripheral speed due to the increase of the winding diameter (roll thickening) at the time of winding the base paper can be absorbed by the torque limiter, the winding speed of the base paper can be substantially reduced. It can be maintained constant and the winding operation of the base paper can be stabilized.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a plate discharge device of a stencil printing machine showing an embodiment of the present invention.

FIG. 2 is a flowchart showing operation timings of main parts in the plate discharging device of the stencil printing machine according to the embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a plate discharge device of a conventional stencil printing machine.

[Explanation of symbols] 5 plate cylinder 6 base paper 7 clamper 14, 15 plate discharge roller 19 presser roller 20 pipe mounting shaft 21 winding pipe 23 pressing arm 26 pressing solenoid 28 plate cylinder sensor 29 plate discharge sensor P paper

Claims (2)

[Claims] 1. A porous cylindrical plate cylinder is perforated and wound, and pressed against the plate cylinder by a pressing member composed of a press roller so that the inner surface of the plate cylinder permeates through the perforations. A stencil ejector of a stencil printing machine configured to automatically separate the printed base paper that has been printed by pressing ink on the paper and discard it from the plate cylinder,
A plate cylinder driving means for rotating the plate cylinder in a plate discharge direction opposite to that for printing at the time of plate discharge of the base paper, and a pair of plate discharge rollers, which is downstream in the rotation direction of the plate cylinder with respect to the plate cylinder rotating in the plate discharge direction. Peeling and conveying means for holding and conveying the base paper from the rear end side of the base paper by bringing the plate discharge rollers located on the side closer to and away from each other, and peeling the base paper wound around the plate cylinder from the plate cylinder; A take-up pipe that winds the base paper separated from the cylinder from the rear end side of the base paper with the print surface of the base paper facing up, and supports the take-up pipe via a torque limiter and drives and rotates the take-up pipe in the take-up direction of the base paper. A plate discharger for a stencil printing machine, comprising: a pipe mounting rod for controlling the pressure; and a pressing roller that is pressed against the surface of the base paper wound on the winding pipe and is driven to rotate in the winding direction of the base paper. 2. The pipe mounting rod and the pressing roller are configured to be contactable and separable, and the winding pipe can be attached to and detached from the pipe mounting rod along the rotation axis direction of the pipe mounting rod. The plate discharge device for a stencil printing machine according to claim 1, wherein