JP3983391B2 - Paper receiving device for rotary stencil printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper receiving device for a rotary stencil printing press.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a paper receiving device of a rotary stencil printing press includes a stop guide plate facing the paper discharge unit of the printing press main body and width guide plates arranged on both sides in the width direction of the paper, and stacks the paper between the guide plates. It has become.
[0003]
[Problems to be solved by the invention]
By the way, as shown in FIG. 1, for example, the applicant of the present application detects the discharge of the printed paper by a paper discharge sensor 8 of the printing machine main body 1 and uses it as a trigger to stop the guide plate 22 after a predetermined delay time has elapsed. A paper receiving device has been proposed in which a pair of width guide plates 32 are driven back and forth in the direction of contact with and separated from the paper so that the stacks of paper on the paper receiving tray 12 are aligned (for example, Japanese Patent Application No. Hei. 9-308540, unpublished). This paper receiving apparatus is described for easy understanding of the present invention, and is not a conventional technique.
[0004]
The guide plates 22 and 32 of the paper receiving device are, for example, normally in an open position away from the paper, and a closed position in which the paper discharged from the printing press main body 1 approaches the paper after landing on the paper receiving tray 12. Drive until. In this case, the delay time from the detection of the front edge of the paper by the paper discharge sensor 8 to the start of driving of the guide plates 22 and 32 is relatively wide, so it is constant regardless of the paper size. It is also possible.
[0005]
On the other hand, if the stop guide plate 22 is driven so that the front end of the sheet discharged from the printing press main body 1 contacts the stop guide plate 22 that is moving backward from the closed position to the open position, the paper is discharged from the printing press main body 1. Since it is not bounced back to the paper part 9 side, jamming at the paper discharge part 9 can be prevented. Further, it is possible to reduce the sound when the sheet comes into contact with the stop guide plate 22. In this case, it is necessary to drive the stop guide plate 22 at a timing corresponding to the length of the paper in the paper discharge direction 90 (hereinafter also simply referred to as “paper length”).
[0006]
As a method of obtaining the paper length information, a method of using paper size information input from an operation panel (not shown) or a stop guide plate 22 set according to the length of paper to be printed is used. A method for detecting the position is conceivable.
[0007]
However, as a general printing press, the paper size input from the operation panel is often made rough. That is, the setting of the paper size by the operation panel is mainly used for controlling the plate making, and there is little trouble even if it is input incorrectly. For example, there is a case where printing is actually performed on A4 size paper while being set to A3 size on the operation panel. Further, when a fixed paper size is selected from the operation panel, an arbitrary paper size cannot be set. On the other hand, the guide plate of the paper feeding device is often set correctly according to the paper size, but is not always set correctly.
[0008]
Therefore, a technical problem to be solved by the present invention is to provide a paper receiving apparatus that can appropriately drive a guide plate based on an accurate paper length.
[0009]
[Means for Solving the Problems]
In order to solve the above technical problem, the present invention provides a paper receiving device for a rotary stencil printing press having the following configuration.
[0010]
A paper receiving device of a rotary stencil printing machine includes a paper receiving base that is adjacent to a paper discharge portion of a printing machine main body that sequentially discharges printed paper and extends substantially along the paper discharge direction below the paper discharge portion. A stop guide plate that faces the paper discharge unit above the paper tray and extends in a direction substantially orthogonal to the paper discharge direction; and a position above the paper tray and between the paper discharge unit and the stop guide plate. A pair of width guide plates extending approximately parallel to the paper discharge direction at substantially equal intervals to the width of the paper discharged from the paper discharge section, and at least the above-mentioned stop guide plate and the pair of width guide plates The guide plate driving means for moving the stop guide plate in the direction of contact with and separating from the paper stacked on the paper cradle, and the guide plate driving means is operated in synchronization with the discharge of the paper from the printing machine main body, and the stop Guide plate and a pair of the above width guides Paper alignment in which at least the stop guide plate of the door plate is reciprocated between a “closed” position approaching the sheets stacked on the paper cradle and an “open” position away from the “closed” position. And a sheet alignment control means for executing the operation. The paper receiving device of the rotary stencil printing machine further includes a paper length detection unit that detects the length of the paper discharged from the printing machine main body in the paper discharge direction. The paper alignment control means operates the guide plate driving means to execute the paper alignment operation based on the length of the paper in the paper discharge direction detected by the paper length detection means.
[0011]
In the above configuration, the paper length detection unit detects the length in the paper discharge direction of the paper that is actually printed and discharged. The paper length detecting means is not limited to being provided in the paper discharge device main body, but may be provided in the printing press main body or in a paper feeding device that supplies paper to the printing press main body. The paper alignment control means can execute the paper alignment operation at an appropriate timing based on the correct length in the paper discharge direction detected by the paper length detection means.
[0012]
Therefore, the guide plate can be appropriately driven based on the accurate sheet length.
[0013]
Preferably, paper conveyance pulse output means for outputting a pulse every time the paper is conveyed by a predetermined distance is provided. The paper sheet length detecting means includes a paper presence / absence detecting means for detecting the presence / absence of paper at a predetermined position in the paper transport path, and a period from when the paper presence / absence detecting means starts detecting the presence of paper to detecting the absence of paper. And a pulse count means for counting pulses output from the paper transport pulse output means. The paper alignment control means determines the number of delay pulses according to the number of pulses counted by the pulse counting means, and the paper conveyance pulse output means outputs after the detection of the presence / absence of paper by the paper presence / absence detection means changes. The pulses are counted, and when the count number reaches the delay pulse number, the guide plate driving means is operated to execute the sheet aligning operation.
[0014]
According to the above configuration, the configuration of the drive control system for the guide plate is simplified.
[0015]
The present invention also provides a paper receiving device for a rotary stencil printing press having another configuration.
[0016]
A paper receiving device of a rotary stencil printing machine includes a paper receiving base that is adjacent to a paper discharge portion of a printing machine main body that sequentially discharges printed paper and extends substantially along the paper discharge direction below the paper discharge portion. A stop guide plate that faces the paper discharge unit above the paper tray and extends in a direction substantially orthogonal to the paper discharge direction; and a position above the paper tray and between the paper discharge unit and the stop guide plate. A pair of width guide plates extending approximately parallel to the paper discharge direction at substantially equal intervals to the width of the paper discharged from the paper discharge section, and at least the above-mentioned stop guide plate and the pair of width guide plates The guide plate driving means for moving the stop guide plate in the direction of contact with and separating from the paper stacked on the paper cradle, and the guide plate driving means is operated in synchronization with the discharge of the paper from the printing machine main body, and the stop Guide plate and a pair of the above width guides Paper alignment in which at least the stop guide plate of the door plate is reciprocated between a “closed” position approaching the sheets stacked on the paper cradle and an “open” position away from the “closed” position. And a sheet alignment control means for executing the operation. A paper receiving device of a rotary stencil printing machine comprises: a paper length detecting means for detecting a length of a paper discharged from the printing machine main body in a paper discharge direction; at least the above-mentioned stop guide plate and the pair of width guide plates; A guide position detecting means for detecting the position of the stop guide plate, and the stop guide plate and the pair of widths detected by the guide position detecting means when the paper length detecting means detects the length of the first paper. Guide position correcting means for operating and correcting the guide plate driving means if at least the position of the stop guide plate of the guide plates is within a correctable range.
[0017]
In the above configuration, the paper length detection unit detects the length in the paper discharge direction of the paper that is actually printed and discharged. The paper length detection means preferably supplies the paper to the upstream side of the paper transport path, that is, in the printer main body or to the printer main body in order to provide a time margin until the guide position is corrected after the paper detection. It is provided in the paper feeding device. When the set position of the stop guide plate is not appropriate, the guide position correcting means corrects the position to an appropriate position if possible. For example, the stop guide is moved to the normal position until the first sheet arrives. Furthermore, when the first sheet does not arrive in time, the driving of the stop guide plate may be started at an appropriate timing and the normal movement may be performed from the middle.
[0018]
Therefore, the guide plate can be appropriately driven based on the accurate sheet length.
[0019]
The above configuration has the same operation and effect even when the sheet alignment operation is not performed, that is, when the sheet alignment control unit is not provided. Accordingly, the present invention provides a paper receiving device for a rotary stencil printing press having the following configuration.
[0020]
A paper receiving device of a rotary stencil printing machine includes a paper receiving base that is adjacent to a paper discharge portion of a printing machine main body that sequentially discharges printed paper and extends substantially along the paper discharge direction below the paper discharge portion. A stop guide plate that faces the paper discharge unit above the paper tray and extends in a direction substantially orthogonal to the paper discharge direction; and a position above the paper tray and between the paper discharge unit and the stop guide plate. A pair of width guide plates extending approximately parallel to the paper discharge direction at substantially equal intervals to the width of the paper discharged from the paper discharge section, and at least the above-mentioned stop guide plate and the pair of width guide plates This is a type provided with a guide plate driving means for moving the stop guide plate in a direction of coming into contact with and separating from the paper stacked on the paper receiving tray. A paper receiving device of a rotary stencil printing machine comprises: a paper length detecting means for detecting a length of a paper discharged from the printing machine main body in a paper discharge direction; at least the above-mentioned stop guide plate and the pair of width guide plates; A guide position detecting means for detecting the position of the stop guide plate, and the stop guide plate and the pair of widths detected by the guide position detecting means when the paper length detecting means detects the length of the first paper. Guide position correcting means for operating and correcting the guide plate driving means if at least the position of the stop guide plate of the guide plates is within a correctable range.
[0021]
According to the above configuration, the setting position of the stop guide plate can be corrected to an appropriate position if possible based on the exact length of the sheet to be actually printed. In other words, the guide plate can be appropriately driven based on the accurate sheet length.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a paper receiving device of a rotary stencil printing machine according to an embodiment of the present invention will be described.
[0023]
As shown in the front view of FIG. 1, the rotary stencil printing press main body 1 supplies printing paper one by one between the plate cylinder 4 and the press roller 6 from one of the paper feed bases 2 a, 2 b, 2 c. After printing, the printed paper is discharged to the paper receiving device 10 by the paper discharge belt 7.
[0024]
Specifically, the paper feed tables 2a, 2b, and 2c include first and second paper feed tables 2a and 2b provided at the lower portion of the printing press main body, and a manual paper feed stand provided on one side of the printing press main body. 2c. The first and second paper feed trays 2a and 2b are configured as bottom plates of a paper cassette (not shown) that are normally stored in the printer main body and pulled out from the front side of the printer main body when paper is replenished. The manual feed tray 2c is used in a state where it is exposed to the outside from the side surface of the printing press main body as shown in the drawing as needed, and is normally stored in a folded state on one side of the printing press main body. The first and second paper feed trays 2a and 2b can place a large amount of paper (for example, 1000 sheets), whereas the manual paper feed base 2c can carry a small amount of paper (for example, several to several tens of sheets). Can be placed. The selected sheets on the sheet feed trays 2a, 2b, and 2c are separated and conveyed one by one by known means such as a sheet feeding ring, a separating plate, and a conveyance roller, and the plate cylinder 4 and the press roller at a predetermined timing. 6 is sent out. Paper feed sensors 2x, 2y, and 2z that detect the passage of paper are provided at the exits of the paper feed trays 2a, 2b, and 2c, respectively.
[0025]
A stencil sheet made by the plate making unit 5a is mounted on the plate cylinder 4. The plate making unit 5a reads a document placed on a document table (not shown) provided on the upper part of the printing machine main body 1, enlarges or reduces it if necessary based on the image, makes a stencil sheet, and makes a plate cylinder 4 Attach to. The stencil sheet mounted on the plate cylinder 4 is removed and collected by the removing unit 5b. The plate cylinder 4 is supplied with ink therein and rotates in synchronization with the paper feed speed. The press roller 6 is disposed below the plate cylinder 4 so as to be able to contact and separate. The press roller 6 is raised when the paper passes between the plate cylinder 4 and the press roller 6 and presses the paper against the plate cylinder 4 side. As a result, ink that has passed through the plate cylinder 4 and the stencil sheet adheres to the paper and is printed. The lower surface of the printed paper is supported by the paper discharge belt 7 and is discharged from the paper discharge unit 9 to the paper receiving device 10. A paper discharge sensor 8 for detecting paper discharge is provided immediately before the paper discharge unit 9.
[0026]
Next, the paper receiver 10 will be described with reference to the perspective views of FIGS. 1 and 2, the perspective view of FIG. 3, and the cross-sectional view of FIG.
[0027]
The paper receiver 10 includes a paper receiver 12 that extends from the lower side of the paper output section 9 substantially along the paper output direction 90, a stop guide plate 22 disposed on the paper receiver 12, and a pair of width guide plates 32. And a guide plate driving mechanism for moving the guide plates 22 and 32, and the printed sheets are sequentially stacked on the paper tray 12 with the sides aligned between the guide plates 22 and 32. It is like that. The paper feed tray 12 is provided with a paper presence / absence sensor 18 for detecting whether or not there is paper on the paper feed tray 12.
[0028]
Specifically, the stop guide plate 22 faces the paper discharge unit 9 of the printing machine 1, extends in a direction orthogonal to the paper discharge direction 90 of the printed paper, and has been printed from the paper discharge unit 9 into the air. The front edge of the paper comes into contact. As shown in FIG. 3, the stop guide plate 22 is moved in the paper discharge direction 90 by a stop guide plate support member 26 that slides along the parallel guide rail 20 fixed in the paper discharge direction 90 inside the paper tray 12. It is supported to move freely.
[0029]
The pair of width guide plates 32 extend in parallel along the paper discharge direction 90 between the paper discharge unit 9 and the stop guide plate 22 and come into contact with the left and right side edges of the printed paper. ing. As shown in FIG. 3, the pair of width guide plates 32 support a stop guide plate that slides along parallel guide rails 30 fixed in a direction perpendicular to the paper discharge direction 90 inside the paper tray 12. The members 36 are respectively supported so as to be movable in a direction perpendicular to the paper discharge direction 90. As shown in FIG. 2, a plurality of comb-like protrusions 34 are provided at the lower ends of the pair of width guide plates 32, and the discharge direction 90 provided on the upper surface 13 of the paper receiving tray 12 is arranged. A plurality of rows of grooves 14 extending in a perpendicular direction are slidably fitted. This prevents the paper on the paper receiving tray 12 from entering the gap between the upper surface of the paper receiving tray 12 and the lower end of the width guide plate 32 and shifting the position of the paper.
[0030]
As shown in FIGS. 3 and 4, the light shielding plates 28 and 38 are respectively fixed to the guide plate support members 26 and 36, and the light receiving sensors 29 and 39 are disposed at appropriate positions on the paper tray 12. The light shielding plates 28 and 38 shield the light shielding sensors 29 and 39 when the guide plates 22 and 32 are disposed at the home positions where they are moved most outward.
[0031]
Each guide plate 22, 32 is driven by a guide plate drive mechanism. The guide plate driving mechanism is provided with two sets in total, one set for the stop guide plate 22 and one set for the pair of width guide plates 32.
[0032]
As shown in FIGS. 3 and 4, the guide plate drive mechanism for the stop guide plate 22 is supported by a pair of pulleys 44 along the parallel guide rail 20 and rotates the drive belt 40 and one pulley 44. The stepping motor 42 is provided. The stepping motor 42 rotates when a drive pulse signal is given from a drive circuit (not shown). One pulley 44 rotates by the rotation of the stepping motor 42, and the drive belt 40 circulates between the pair of pulleys 44 in both directions. A lower portion 27 of the stop guide plate support member 26 holds the drive belt 40 and moves together with the drive belt 40. Therefore, the stop guide plate 22 is driven in the paper discharge direction 90 along the parallel guide rail 20.
[0033]
The guide plate drive mechanism for the pair of width guide plates 32 is also configured in substantially the same manner, and as shown in FIG. 3, a drive belt 40 supported by a pair of pulleys 44 along the parallel guide rail 30 is provided. It is circulated by the rotation of the stepping motor 42. The lower part of each width guide plate support member 36 sandwiches both sides of the drive belt 40, and moves with the drive belt 40 by a distance equal to the direction of contact with and away from each other. Accordingly, the pair of width guide plates 32 are driven along the parallel guide rails 30 by a distance equal to the direction in which they are in contact with and away from each other.
[0034]
Further, each guide plate driving mechanism is provided with a pulse encoder. That is, as shown in FIGS. 3 and 4, the pulse plate 46 is coupled to one pulley 44, and the photo interrupter 48 is disposed so as to face the pulse plate 46. The pulse plate 46 has pulse marks arranged radially. The photo interrupter 48 detects the passage of the pulse mark on the pulse plate 46 and generates a pulse signal. After the home position is detected by the above-described light-shielding sensors 29 and 39, the position of each guide plate 22 and 32 is detected by counting the pulse signals from the photo interrupter 48.
[0035]
As shown in FIG. 3, the paper receiving apparatus 10 is further provided with an operation panel 50 so that the positions of the stop guide plate 22 and the pair of width guide plates 32 can be arbitrarily set. That is, by operating the switches 52 and 54, the stop guide plate 22 can be moved to both sides of the paper discharge direction 90, and the switches 56 and 58 can move the pair of width guide plates 32 toward and away from each other. .
[0036]
The drive control of the guide plate of the paper receiver 10 is performed by a CPU (not shown) (specifically, a known sequencer).
[0037]
Next, the sheet aligning operation of the guide plates 22 and 32 during printing will be described with reference to the timing chart of FIG. (A) shows the movement of the pair of width guide plates 32, and (b) shows the movement of the stop guide plate 22. Here, the “closed” position is a paper alignment position where the guide plates 22 and 32 approach or abut the paper at a predetermined position on the paper receiving tray 12, and the “open” position is a position where the guide plates 22 and 32 receive the paper. A retreat position moved away from the paper at a predetermined position on the table 12 is shown. An arrow A indicates a point in time when the front end of the sheet discharged from the printing press 1 contacts the stop guide plate 22.
[0038]
As shown in FIG. 5B, the stop guide plate 22 is moved from the closed position to the open position as indicated by T1 before and after the front edge of the sheet comes into contact with the stop guide plate 22 (indicated by an arrow A). The front end of the sheet abuts against the stop guide plate 22 that is moving backward in the paper discharge direction 90. As a result, the sound when the paper comes into contact with the stop guide plate 22 is reduced, and the paper is prevented from coming into contact with the stop guide plate 22 and rebounding to the paper discharge unit 9 of the printer main body 1. Then, as indicated by T 2 → T 3 → T 4, the position returns to the closed position, and the position in the paper discharge direction 90 is aligned with the paper alignment position.
[0039]
As shown in FIG. 5A, the pair of width guide plates 32 moves in synchronization with the stop guide plate 22. That is, before and after the front edge of the paper comes into contact with the stop guide plate 22, the paper moves from the closed position to the open position as indicated by K1, and closes while the paper is falling or when the paper is landed on the paper tray or after landing. Reach position. As a result, the width direction positions of the sheets are aligned. And it returns to a closed position as shown by K2->K3-> K4.
[0040]
By executing the above series of operations in accordance with the paper discharge cycle, the paper can be neatly aligned on the paper receiving tray.
[0041]
Instead of driving the guide plates 22 and 32 each time a sheet is discharged from the printing press 1, the guide plates 22 and 32 may be driven intermittently every time several sheets are discharged.
[0042]
Next, control of the operation timing of the guide plates 22 and 32 will be described.
[0043]
As shown in the flowchart of FIG. 6, in step # 10, the process waits for the paper discharge sensor 8 to detect the front edge of the paper. When the paper discharge sensor 8 detects the front edge of the paper, in step # 12, counting of pulses output from a pulse encoder (not shown) provided on the plate cylinder 4 is started. In step # 14, the paper discharge sensor 8 is started. Waits for the trailing edge of the paper to be detected. When the paper discharge sensor 8 detects the trailing edge of the paper, the counter is reset after reading the pulse count value C in step # 16. In step # 18, based on the read pulse count value C, the guide plates 22, The number N of delay pulses for driving 32 is determined.
[0044]
In step # 20, counting of pulses output from the pulse encoder provided in the plate cylinder 4 is started. In step # 22, the process waits for the pulse count value to reach the delay pulse number N. When the pulse count value reaches the number N of delayed pulses, in step # 24, the counter is reset and guide plate driving for reciprocating the guide plates 22 and 32 in the closed position to the open position is started.
[0045]
That is, the sheet conveyance distance ΔL for one pulse is constant, and the length L of the sheet in the paper discharge direction 90 is proportional to the pulse count value C, and L = ΔL · C. Based on L, the operation timing of the guide plate, that is, the delay pulse number N can be determined.
[0046]
Specifically, as shown in FIG. 7, when the paper transport distance between the sensor and the rear end position of the paper stacked on the paper tray is W and the paper transport speed is V, the rear end of the paper passes the sensor. Pulse number N until the leading edge of the sheet reaches the closed position of the stop guide plate indicated by the solid line N ₀ If the paper transport speed V is constant, N ₀ = W / ΔL, which is constant.
[0047]
However, in reality, the discharged paper is decelerated in the air, and the front end of the paper is brought into contact with the stopping guide plate that is moving backward, so that the number of delay pulses N = N ₀ When + α (α is a correction value) has elapsed, the driving of the stop guide plate may be started.
[0048]
This correction value α can be appropriately determined according to the length L of the sheet, and therefore the pulse count value C. Preferably, the correction value α is determined in advance using the pulse count value C as a parameter, and the delay pulse number N is determined using a table.
[0049]
When the pulses generated in proportion to the sheet conveyance distance are counted in this way, the drive control of the guide plates 22 and 32 can be performed at an optimum timing regardless of the sheet conveyance speed V.
[0050]
Further, since the paper transport path of the printing machine main body 1 is relatively long and the position of the stop guide plate 22 can be detected, the paper feed sensors 2x, 2x, 2c provided at the outlets of the paper feed bases 2a, 2b, 2c. It is possible to correct the setting position of the stop guide plate 22 using 2y and 2z.
[0051]
That is, when the first sheet of paper is conveyed from the paper feed trays 2a, 2b, 2c to the plate cylinder 4 at the start of printing, the length of the paper is detected using the paper feed sensors 2x, 2y, 2z. To do. Then, it is determined whether or not the position of the stop guide plate 22 is appropriately set corresponding to the length of the sheet. If the position of the stop guide 22 is not set appropriately, the position of the stop guide plate 22 is corrected before the first sheet is printed and discharged from the printing machine main body 1 until it reaches the stop guide plate 22. Determine if it is possible. If correction is possible, the set position of the stop guide plate 22 is corrected by operating the guide plate drive mechanism until the first sheet reaches the stop guide plate 22. At this time, if necessary, the start of printing of the first sheet may be delayed to correct the set position of the stop guide plate 22. If correction is impossible, for example, a warning is displayed.
[0052]
The paper receiving device 10 of the rotary stencil printing press described above can appropriately drive the guide plates 22 and 32 based on the accurate paper length.
[0053]
In addition, this invention is not limited to the said embodiment, It can implement in another various aspect.
[0054]
For example, the driving mode of the guide plate of the paper receiving device is arbitrary, and the sensor for detecting the length of the paper may be provided at a position different from the above embodiment.
[Brief description of the drawings]
FIG. 1 is a front view of a paper receiving apparatus and a printing machine main body according to an embodiment of the present invention.
FIG. 2 is a perspective view of the paper receiving apparatus of FIG.
FIG. 3 is a perspective view of the paper receiving device of FIG. 1;
4 is a cross-sectional view of the paper receiving device of FIG. 1. FIG.
FIG. 5 is a timing chart of the operation of the guide plate of the paper receiving apparatus of FIG.
6 is a flowchart of the operation of the paper receiving apparatus of FIG.
FIG. 7 is an explanatory diagram of the operation of the paper receiving device of FIG. 1;
[Explanation of symbols]
1 Rotational stencil printing press
2a, 2b, 2c
2x, 2y, 2z Paper feed sensor
4 Plate cylinder
5a Plate making part
5b Removal part
6 Press roller
7 Output belt
8 Paper discharge sensor
9 Output section
10 Paper receiving device
12 Paper cradle
13 Top surface
14 groove
18 Paper presence sensor
20 Parallel guide rail
22 Stop guide plate
26 Stop guide plate support member
27 Lower part
28 Shading plate
29 Shading sensor
30 Parallel guide rail
32 width guide plate
34 Protrusion
36 width guide plate support member
38 Shading plate
39 Shading sensor
40 Drive belt (guide plate drive means)
42 Stepping motor (guide plate driving means)
44 Pulley (guide plate drive means)
46 Pulse plate
48 Photointerrupter
50 Operation panel
52, 54, 56, 58 switches
90 Output direction

Claims (2)

A paper receiver that is adjacent to the paper discharge section (9) of the printer main body (1) that sequentially discharges the printed paper and extends substantially along the paper discharge direction (90) below the paper discharge section (9). Stand (12),
A stop guide plate (22) extending in a direction substantially perpendicular to the paper discharge direction (90) facing the paper discharge unit (9) above the paper tray (12);
Paper is discharged at an interval approximately equal to the width of the paper discharged from the paper discharge section (9) above the paper tray (12) and between the paper discharge section (9) and the stop guide plate (22). A pair of width guide plates (32) extending generally parallel to the direction (90);
A guide for moving at least the stop guide plate (22) of the stop guide plate (22) and the pair of width guide plates (32) in a direction to come in contact with and separate from the paper stacked on the paper tray (12). Plate driving means (40, 42, 44);
The guide plate driving means (40, 42, 44) is operated in synchronism with the discharge of the sheet from the printing machine main body (1), and at least of the stop guide plate (22) and the pair of width guide plates (32). Paper for reciprocating the stop guide plate (22) between a “closed” position approaching the paper stacked on the paper cradle (12) and an “open” position away from the “closed” position. Paper alignment control means for performing alignment operation ;
Paper length detection means (2x, 2y, 2z, 8) for detecting the length of the paper discharged from the printing machine main body (1) in the paper discharge direction (90) ;
A paper conveyance pulse output means for outputting a pulse for every predetermined distance conveyance of the paper;
The paper length detection means (2x, 2y, 2z, 8) includes paper presence / absence detection means (2x, 2y, 2z, 8) for detecting the presence / absence of paper at a predetermined position in the paper transport path,
Pulse counting means for counting the pulses output from the paper transport pulse output means between the time when the paper presence / absence detecting means (2x, 2y, 2z, 8) starts detecting the presence of paper and before detecting the absence of paper. Including
The paper alignment control means determines the delay pulse number (N) according to the pulse number (C) counted by the pulse count means, and the presence / absence of paper by the paper presence / absence detection means (2x, 2y, 2z, 8). The number of pulses output by the paper conveyance pulse output means after the detection of the number of pulses is counted, and when the count reaches the delay pulse number (N), the guide plate driving means (40, 42, 44) is turned on. is operated, based on the length of the sheet discharging direction of the sheet by running the sheet aligning operation (90), a paper of a rotary stencil printing machine, characterized in that to execute the sheet aligning operation receiving device. The paper presence / absence detection means is composed of paper length detection means (2x, 2y, 2z, 8) for detecting the length of the paper discharged from the printing machine body (1) in the paper discharge direction (90) .
Furthermore, guide position detection means (28, 29) for detecting the position of at least the stop guide plate (22) of the stop guide plate (22) and the pair of width guide plates (32), and the sheet length detection When the means (2x, 2y, 2z, 8) detects the length of the first sheet, the stop guide plate (22) and the pair of width guide plates detected by the guide position detecting means (28, 29). (32) a guide position correcting means for operating and correcting the guide plate driving means (40, 42, 44) if at least the position of the stop guide plate (22) is within a correctable range. The paper receiving device for a rotary stencil printing machine according to claim 1.

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