JP3987604B2 - 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 and a paper feeding device of a rotary stencil printing press.
[0002]
[Prior art]
Conventionally, rotary stencil printing presses have a small-capacity paper feed unit and a small number of sheets that can be printed at one time, and a large-capacity paper feed unit that can print a large number of sheets at once (hereinafter referred to as a "large-capacity machine"). ). The latter large capacity machine is desired to be improved in the following points.
[0003]
First, the large-capacity machine can continuously print a large amount of replenished paper (for example, 3000 sheets) at a time, but the capacity of the paper receiving device for collecting printed paper is smaller (for example, 1000 sheets). For this reason, when printing in large quantities, it is necessary to interrupt printing halfway and take out the printed paper from the paper receiving apparatus, resulting in poor work efficiency. This is because such a problem does not occur if the capacity of the paper receiving apparatus is large, but the capacity of the paper receiving apparatus can only be increased to a certain extent. In other words, even if the distance from the paper discharge unit to the paper cradle is increased and the capacity of the paper receiving device is increased by stacking high-printed paper, the printed This is due to the fact that the paper has a long drop distance, the posture is disturbed in the air, and the paper becomes uneven when stacked on the paper tray.
[0004]
Secondly, the sheet feeder of a large capacity machine generally moves up and down so that the top of the sheets stacked on the sheet feeder comes to a predetermined height that abuts the sheet feed ring. Even if a small amount of paper (for example, paper of different thickness or color or paper for trial printing) is printed, the paper feed stand is once lowered to the lower limit position. Printing cannot be performed unless the paper is replenished (if it is the same size, it is stacked on the paper stacked in the paper feed unit) and the paper cradle is raised again. For this reason, as the number of sheets remaining on the sheet feed table decreases, the time for raising and lowering the sheet feed table becomes longer, and the replenishment of a small amount of sheets becomes inefficient.
[0005]
[Problems to be solved by the invention]
Accordingly, a first technical problem to be solved by the present invention is to provide a paper receiving device for a rotary stencil printing press capable of stacking a large number of printed sheets in a line without interrupting the printing operation. . A second technical problem to be solved by the present invention is to provide a paper feeding device for a rotary stencil printing press that can efficiently supply a small amount of paper.
[0006]
[Means for solving the problems and actions / effects]
In order to solve the above first technical problem, the present invention provides a paper receiving apparatus for a rotary stencil printing press having the following configuration.
[0007]
A paper receiving device of a rotary stencil printing press has a paper receiving stand, a stop guide plate, and a pair of width guide plates, and the paper receiving stand is a paper discharge unit of a printing machine main body from which printed paper is discharged. , And extends substantially along the paper discharge direction below the paper discharge unit, and the stop guide plate faces the paper discharge unit above the paper receiving base and is substantially orthogonal to the paper discharge direction. The pair of width guide plates extending in the direction is approximately equal to the width of the printed paper discharged from the paper discharge unit above the paper receiving base and between the paper discharge unit and the stop guide plate. It is of a type that extends approximately parallel to the paper discharge direction at intervals. A paper receiving device of a rotary stencil printing machine includes a guide plate supporting means for holding the stop guide plate and the pair of width guide plates at a fixed position with respect to the paper discharge unit separately from the paper receiving table, Elevator means for raising and lowering the paper cradle, and detecting the height of the paper stacked on the paper cradle, and being above the lower ends of the stop guide plate and the width guide plate, and the paper discharge unit of the printer main body When the sheet height detecting means installed below and the sheet height detecting means is above the reference height, the elevator means is operated so that the sheet height is higher than the lower end of the width guide plate. And a control means for lowering the paper cradle. The reference height is above the lower ends of the stop guide plate and the width guide plate, and below the paper discharge unit of the printer main body. Further, the guide plate support means extends substantially along the paper discharge direction above the paper discharge unit, and is rotatably fixed to the paper receiver main body so that the upper part of the paper receiver can be opened. It is made up of an upper plate .
[0008]
In the above configuration, the printing paper discharged from the paper discharge unit of the printing machine main body falls down with its front end hitting the stop guide plate, and is sequentially stacked on the paper receiving tray. At this time, the front end of each sheet is aligned along the stop guide, and the left and right ends are aligned along the width guide plate. When the stacked sheets become higher than the reference height and the sheet height detecting means detects it, the control means operates the elevator means to lower the paper receiving table. At this time, The paper height is higher than the lower end of the width guide plate In order to maintain the state, the sheets stacked thereafter are aligned and stacked on the existing sheets. Since the paper feed table is lowered, a large number of sheets can be stacked on the paper feed table.
[0009]
Therefore, a large number of printed sheets can be stacked and stacked without interrupting the printing operation.
[0010]
In the above configuration, the guide plate support means can be provided, for example, around the outside of each guide plate.
[0011]
Preferably, the guide plate support means is an upper plate extending substantially along the paper discharge direction above the paper discharge portion.
[0012]
According to the above configuration, it is easy to change the position of the guide plate according to the paper size.
[0013]
Preferably, the upper plate is rotatably fixed to the paper receiving apparatus main body, and can open the upper side of the paper receiving base.
[0014]
According to the above configuration, the sheets stacked on the paper receiving tray can be taken out by simply lifting the upper plate and the guide plates together.
[0015]
Preferably, the upper surface of the paper tray has a groove into which each lower end of the stop guide plate and the pair of width guide plates is inserted.
[0016]
According to the above configuration, even if the initial position of the paper cradle is slightly shifted, printing can be started from the state where the lower end of each guide plate is inserted into the groove on the upper surface of the paper cradle. It is possible to prevent the paper from coming out from between the two.
[0017]
In the above configuration, when the uppermost sheet of the sheets placed on the paper cradle is above the reference height, the paper cradle can be lowered by various methods. For example, it may be lowered for a predetermined time.
[0018]
Preferably, when the height of the paper detected by the paper height detection means is higher than the reference height, the control means has a height of the paper on the paper receiving base lower than the reference height. The elevator means is operated until the sheet height detecting means detects this.
[0019]
According to the above configuration, the paper feed table can be lowered at a time until the uppermost sheet of paper placed on the paper tray is below the reference height, and the paper feed table is more than necessary. There is no lowering. If the printing speed or paper thickness changes, the paper loading speed on the paper cradle also changes. However, according to the above configuration, the top paper is always near the reference height in the same way without changing any settings. Can be. Therefore, when the printed paper drops from the paper output unit onto the paper on the paper feed tray, the drop distance is substantially constant, so that dirt due to paper rubbing is further prevented, and the degree of alignment of the stacked paper is also improved. Is even better.
[0020]
Preferably, the control means determines that the height of the paper on the paper cradle is higher than the reference height even when the elevator means is operated to lower the paper cradle for a predetermined time or more. When the detection means continues to detect, an error signal is sent to the printer main body.
[0021]
According to the above configuration, printing can be stopped by detecting an abnormal state such as when the stacking of sheets is disturbed.
[0022]
Since sheets are successively stacked on the paper tray, it is difficult to accurately detect the sheet height.
[0023]
Preferably, the control means operates the elevator means when detecting that the height of the paper detected by the paper height detection means is higher than the reference height for a predetermined time or more.
[0024]
According to the above configuration, even if the height of the paper before being completely overlaid on the preceding paper is higher than the reference height, it is possible to prevent the paper cradle from being lowered. It can be carried out.
[0025]
Preferably, the paper height detecting means is a detecting means for detecting a side surface of the paper stacked on the paper receiving tray.
[0026]
According to the above configuration, it is possible to detect the height of the completely stacked sheets even if the printing is performed at a high speed and a plurality of printed sheets are floated and are on the paper tray.
[0027]
Preferably, the sheet height detecting means includes a light projecting section and a light receiving section disposed at positions opposed to each other across the sheet stacked on the sheet receiving table above lower ends of the stop guide plate and the width guide plate. Is a light shielding sensor.
[0028]
According to the above configuration, the floating sheet and the completely stacked sheet can be identified by the length of the light shielding time, the amount of received light, and the like, and the control becomes easy.
[0029]
In order to solve the second technical problem, the present invention provides a paper feeding device for a rotary stencil printing press having the following configuration.
[0030]
The paper feeding device of the rotary stencil printing machine includes a paper feeding table on which paper is placed, elevator means for raising and lowering the paper feeding table, and sheets of paper placed on the paper feeding table one by one in the main body of the printing machine. And a sheet feeding means to be supplied. A partial lowering means for operating the elevator means for a predetermined short time and lowering the paper feed base by a predetermined distance smaller than a full stroke, and a paper absence detecting means for detecting that no paper is placed on the paper feed base. With. The partial lowering means operates when the paper absence detecting means detects that no paper is placed on the paper feed table during operation of the printing press main body.
[0031]
According to the above configuration, when there is no more paper in the paper feed table, the partial lowering unit operates and the paper feed table can be lowered to an intermediate position as appropriate. The partial lowering means may be configured to automatically lower the paper feed table to a predetermined position when there is no paper in the paper feed table. Or you may comprise so that operation | movement may be started manually and a paper feed stand may be lowered | hung suitably. For example, an operation switch may be provided so that the sheet feeding base is lowered only while the operation switch is being pressed. According to the above configuration, the paper feed table does not descend to the lower limit position but only partway, so the ascending / descending time of the paper feed platform is shortened and a small amount of paper can be replenished immediately.
[0032]
Therefore, a small amount of paper can be replenished efficiently.
[0033]
By the way, if the paper feed base is lowered only while the operation switch is pressed, it is inconvenient to supply a large amount of paper until the paper feed base reaches the lower limit position. is there.
[0034]
Preferably, the elevator means includes a continuous lowering means for continuously operating the elevator means to lower the paper feed table to a lower limit position, and an operation switch. The continuous lowering means operates when the operation switch is kept pressed for a predetermined time or longer.
[0035]
According to the above configuration, not only when there is no paper in the paper feed tray, but also when there is paper on the paper feed tray but the paper feed operation is stopped, if the operation switch is pressed for a predetermined time or longer, the operation is performed thereafter. Even if pressing of the switch is stopped, the sheet feed table is lowered to the lower limit position by the continuous lowering means. Therefore, it is not necessary to continuously press the operation switch until the paper feed tray reaches the lower limit position.
[0036]
Therefore, it is convenient when supplying a large amount of sheets.
[0037]
When the operation switch is pressed until a predetermined time, the partial lowering unit may be configured such that the sheet feeding table is lowered while the operation switch is pressed.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
Below, the printing press 10 which concerns on one Embodiment of this invention shown in FIGS. 1-14 is demonstrated in detail.
[0039]
1 is a front view of the printing machine 10, FIG. 2 is a plan view, FIG. 3 is a side view of a paper receiver 16, FIG. 4 is a perspective view of the main part of the paper receiver 16, FIG. 5 is a block diagram, and FIG. Is a timing chart of the paper receiver, FIGS. 7 to 11 are flowcharts of the operation of the elevator device 40 of the paper receiver 16, and FIGS. 12 to 14 are flowcharts of the operation of the elevator device 70 of the paper feeder 14. .
[0040]
As shown in FIGS. 1 and 2, the printing machine 10 includes a paper feeding unit 14 and a paper receiving unit 16 on both sides of the apparatus main body 12.
[0041]
The paper feed unit 14 is provided on one side (left side in the drawing) of the apparatus main body 12 and has a paper feed table 60 on which a large amount of paper (for example, 3000 sheets) can be placed. The paper feed table 60 has a width guide plate 62 that aligns the width of the paper 18. The width guide plate 62 can be moved according to the width of the paper 18 as indicated by the chain line in FIG. The paper feed table 60 is moved up and down by an elevator device 70 described later. The paper feed table 60 automatically rises as the paper 18 is consumed, so that the uppermost paper 18 a of the loaded paper 18 is always in contact with the paper feed ring 64. The paper feed ring 64 is fixed to the sensor plate 68, and when the paper 18 a of the paper feed base 60 comes into contact with the paper feed ring 64, the sensor plate 68 moves a little to shield the upper limit sensor 68. When the paper feed ring 64 rotates, the uppermost paper 18 a of the paper feed tray 60 is fed one by one between the plate cylinder 20 and the press roller 22 in the apparatus main body 12. A separating plate 66 is disposed on the lower side adjacent to the paper feed ring 64. When the uppermost paper 18a is sent out by the friction of the paper feed ring 64, the lower paper is overlapped and sent out together. It is designed to prevent this.
[0042]
A stencil sheet is attached to the outer peripheral surface of the plate cylinder 20 in the apparatus main body 12, and ink is supplied to the inside of the plate cylinder 20. The press roller 22 presses the paper against the plate cylinder 20 side. At this time, ink that has passed through the plate cylinder 20 and the stencil sheet adheres to the sheet and is printed. The printed sheets are discharged from the apparatus main body 12 and received by the right paper receiving unit 16 in the drawing, and are stacked one after another.
[0043]
The paper receiving unit 16 includes a paper receiving cover 32 that covers printed paper discharged from the apparatus main body 12 from above, and a paper receiving base 30 disposed below the paper receiving cover 32.
[0044]
The paper receiving cover 32 includes an upper plate 34 extending in the horizontal direction, a stop guide plate 36 extending downward from the lower surface of the upper plate 34, and a pair of width guide plates 38. The stop guide plate 36 extends in a direction orthogonal to the paper discharge direction 92 of the printed paper so that the front end of the discharged printed paper comes into contact therewith. The pair of width guide plates 38 extend on both sides along the paper discharge direction 92 of the paper 19 between the apparatus main body 12 and the stop guide 36 and come into contact with both sides of the discharged printed paper 19. ing. 2, the position of the stop guide plate 36 can be set as appropriate in the paper discharge direction 92, and the position of the width guide plate 38 can be set in a direction perpendicular to the paper discharge direction 92. It can cope with paper 19 of different sizes. As shown in FIG. 4, protrusions 37 and 39 are provided at the lower ends of the guide plates 36 and 38.
[0045]
The paper tray 30 can be moved up and down by an elevator device 40 described later between a lower limit position indicated by a solid line and an upper limit position indicated by a chain line in FIGS. 1 and 3. As shown in FIG. 4, through holes 31 a and 31 b extending in the adjustment direction of the guide plates 36 and 38 are formed in the paper receiving tray 30, and the projections 37 and 39 of the guide plates 36 and 38 are formed. Accept each one. When the paper receiving plate 30 is in the upper limit position, the projections 37 and 39 of the guide plates 36 and 38 are engaged with the through grooves 31a and 31b, so printing is performed from the space between the paper receiving cover 32 and the paper receiving stand 30. The used paper 19 does not come out. Therefore, the printed paper 19 is stacked on the paper receiving tray 30 in a uniform manner.
[0046]
When the printed paper 19 is stacked on the paper tray 30 to a certain height, the paper tray 30 is lowered. At this time, the paper cradle is such that the upper part of the stacked printed paper 19 is above the lower ends of the guide plates 36 and 38 and the paper receiving cover 32 and the upper part of the stacked printed paper 19 are always engaged. 30 descends. Thereby, the drop distance of the printed paper 19 discharged from the apparatus main body 12 is kept substantially constant. Further, the lowering stroke of the paper receiving tray 30 is substantially equal to the rising stroke of the paper feeding tray 60. Therefore, even when a large amount of printing is performed, the printed sheets 19 can be sequentially aligned and stacked on the paper receiving tray 30 without interrupting printing.
[0047]
The paper receiving cover 32 is rotatably fixed to the apparatus main body 12 and can be lifted up as shown by a chain line in FIG. Accordingly, the upper portion of the paper receiving tray 30 is opened, and the printed paper 19 placed on the paper receiving tray 30 can be easily taken out.
[0048]
The elevator apparatus 40 that moves up and down the paper tray 30 includes a motor 42, a chain 44, sprockets 46 and 47, and a spring 48. One end of the chain 44 is fixed to the paper cradle 30, extends upward from the paper cradle 30, meshes with a guide sprocket 46 provided above the upper limit position of the paper cradle 30, and extends downward. Is engaged with a drive sprocket 47 that is rotated by a motor 42 via a reduction gear, and the other end is always pulled by a spring 48 fixed to the apparatus main body. When the drive sprocket 47 rotates, the chain 44 moves up or down, and the paper tray 30 moves up and down.
[0049]
The elevator apparatus 40 further includes upper and lower limit switches 50 and 52 for detecting the upper and lower limit positions of the paper tray 30, a level sensor 54 for detecting the height of the paper 19, and a manual lowering switch 58, which will be described later. Thus, the operation is controlled based on these signals. As shown in FIG. 2, the level sensor 54 is disposed above the lower ends of the stop guide plate 36 and the width guide plate 38 so as to be opposed to each other with the paper 19 stacked on the paper receiving tray 30 interposed therebetween. And a light-shielding sensor 54 having a light-receiving portion 54b.
[0050]
The elevator device 70 for raising and lowering the paper feed table 60 is similarly configured, and includes a motor 72, a chain 74, sprockets 76 and 77, a spring 78, an upper limit sensor 80, a lower limit switch 82, a sheet presence / absence sensor 84, And a manual lowering switch 88.
[0051]
As shown in FIG. 5, both elevator apparatuses 40 and 70 are connected to the CPU 2 via the I / O port 3 and are controlled by the CPU 2. Connected to the CPU 2 are a ROM 4, a RAM 5, an EPROM 6, switches of the operation panel 8, and a mechanism unit 9 of the printer main body.
[0052]
Next, operation | movement of the elevator apparatus 40 which raises / lowers the paper receiving stand 30 is demonstrated in detail, referring FIGS. 6-11.
[0053]
As shown in FIG. 7, in step # 10, it is determined whether or not the print start key on the operation panel 8 has been pressed.
[0054]
When the print start key is not pressed, step # 12 for lowering the paper tray 30 is executed only while the manual lowering switch 58 is pressed, and the process returns to step # 10. In step # 12, as shown in detail in FIG. 9, it is determined in step # 50 whether or not the manual lowering switch 58 is on. If not on, the paper tray 30 is stopped in step # 56. If it is on, it is determined in step # 52 whether or not the lower limit switch 52 is on. If the lower limit switch 52 is not on, the paper tray 30 is lowered in step # 54. If it is on, the paper tray 30 is stopped in step # 56.
[0055]
When the print start key is pressed, in step # 14, it is determined whether or not the printed paper 19 is full in the stacker, that is, the paper tray 30, and if it is full, that is, if the lower limit switch 52 is ON, step # 14 is determined. Return to 10. If not full, in step # 16, an initialization process is performed to raise and lower the paper tray 30 to a position suitable for receiving the printed paper 19.
[0056]
In step # 16, as shown in detail in FIG. 8, it is determined in step # 30 based on the output of the upper limit switch 50 whether or not the paper tray 30 is at the home position, that is, the upper limit position. If it is the home position, in step # 32, it is determined whether or not the level sensor 54 has detected the sheet 19. When the paper 19 is not detected, the paper cradle 30 is stopped in step # 38. When the paper 19 is detected, the paper tray 30 is lowered until the level sensor 54 no longer detects the paper 19 in step # 34, step # 36 and step # 38. If it is not the home position, the paper tray 30 is raised in step # 40, and it is determined in step # 42 whether or not the level sensor 54 has detected the paper 19. When the paper 19 is not detected, the process returns to step # 30. When the paper 19 is detected, the paper tray 30 is lowered until the level sensor 54 no longer detects the paper 19 in step # 34, step # 36 and step # 38. That is, the paper cradle 30 is moved up and down so that the height of the uppermost paper 19 a of the paper 19 stacked on the paper cradle 30 is just below the level sensor 54.
[0057]
After step # 16, printing is started in step # 18, and in step # 20, an elevator position control process for lowering the paper tray 30 according to the height of the printed paper 19 is executed, and step # 22. In step # 26, it is determined whether the stacker is full. If the stacker is full, printing is stopped in step # 26, and the process returns to step # 10. If the stacker is not full, it is determined in step # 24 whether or not there is a stop command from the apparatus main body. If there is a stop command, printing is stopped in step # 26 and the process returns to step # 10. If there is no stop command, the process returns to step # 20.
[0058]
In step # 20, as shown in detail in FIG. 10, the paper receiving tray 30 is lowered based on whether or not the lower limit switch 52 is on. That is, in step # 60 and step # 66, if the lower limit switch 52 is on, the descent of the paper tray 30 is stopped. If it is not ON, in step # 62, step # 64 and step # 66, if the paper 19 is detected, the descent is started, and the paper cradle 30 is lowered until the level sensor 54 no longer detects the paper 19.
[0059]
More specifically, in step # 62, when the detection time of the paper 19 by the level sensor 54 reaches a predetermined time, it is determined that the paper 19 is detected. As shown in FIG. 6, when the printed paper passes through the level sensor 54 before being superimposed on the paper tray 30, the level sensor 54 is intermittently shielded (indicated by reference numeral 98). This is because the paper 19 stacked on the paper tray 30 is higher than the level sensor 54 and continuously shields the level sensor 54 (indicated by reference numeral 99). For example, the height of the sheet 19 is higher than that of the level sensor 54 when the sheet 19 is shielded from light for a predetermined time sufficiently longer than the light shielding time, for example, 0.2 seconds, when the level sensor 54 intermittently shields the level sensor 54. Judge that it became.
[0060]
The determination based on the predetermined time (for example, 0.2 seconds) is specifically executed according to the procedure shown in FIG. That is, in step # 70, it is determined whether or not the level sensor 54 is shielded from light. If the light is not shielded, the monitoring timer is reset in step # 80, and “no level sensor paper” is output in step # 82. If the light is shielded, the monitoring timer is started in step # 72. When the monitoring timer has already started, the timer count of the monitoring timer is continued without being reset. Then, in step # 74, it is determined whether or not the timer count value of the monitoring timer is a predetermined time, for example, 0.2 seconds or more. If it is equal to or longer than the predetermined time, the monitoring timer is reset in step # 76, and “level sensor paper present” is output instead of “no level sensor paper” in step # 78. If it is less than the predetermined time, it is left as it is, that is, “no level sensor paper” is output. Steps # 70 to 82 are executed in parallel with the main flow of FIG. 7. In step # 64, the presence / absence of paper is determined based on the output of “with level sensor paper” or “with level sensor paper”. To do.
[0061]
Next, the operation of the elevator apparatus 70 that raises and lowers the sheet feed table 60 will be described with reference to FIGS.
[0062]
In step # 100, the presence / absence of the paper 18 is determined by the paper presence / absence sensor 84. If there is no paper 18, step # 102, which will be described in detail later, is executed, and the process returns to step # 100. If there is paper 18, step # 104, which will be described in detail later, is executed. In step # 106, it is determined whether or not the print start key has been pressed. If the print key is not pressed, the process returns to step # 100. If the print key is pressed, it is determined in step # 108 whether or not the upper limit sensor 80 is shielded from light. If the light is shielded, the paper feed table 60 is raised in step # 110. If it is not shielded from light, the raising of the paper feed tray 60 is stopped in step # 112, and printing is started in step # 114. In step # 116 and step # 118, when the upper limit sensor 80 is shielded from light, the uppermost sheet 18a is fed until the upper limit sensor 80 is shielded. The paper feed table 60 is raised until it abuts on the ring 64. In step # 120, the paper presence / absence sensor 84 determines whether or not the paper 18 is present on the paper feed tray 60. If there is no paper 18, printing is stopped in step # 124, and the process returns to step # 100. If there is paper 18, the presence or absence of a stop command is determined in step # 122. If there is a stop command, printing is stopped in step # 124 and the process returns to step # 100. If there is no stop command, the process returns to step # 116.
[0063]
Next, the specific contents of step # 102 will be described with reference to the detailed flowchart of FIG.
[0064]
In step # 130, it is determined whether or not “intermediate stop mode” is set.
[0065]
If the “intermediate stop mode” is not set, in step # 138, step # 140, and step # 142, the paper feed tray 60 is continuously lowered until the lower limit switch 82 is turned on.
[0066]
If “intermediate stop mode” is set, in step # 132 and step # 134, the paper feed table 60 is lowered until a preset intermediate stop position is reached. That is, when the paper 18 in the paper feed tray 60 runs out, the paper feed tray 60 is partially lowered with respect to the entire stroke up to the lower limit position. If the intermediate stop position is reached, it is determined in step # 136 whether or not the manual lowering switch 88 is on. If it is on, in step # 138, step # 140, and step # 142, the paper feed table 60 is lowered until the lower limit switch 82 is turned on. If not, in step # 142, the lowering of the paper feed table 60 is stopped.
[0067]
Next, the specific contents of step # 104 will be described with reference to the detailed flowchart of FIG.
[0068]
In step # 150, it is determined whether or not the manual lowering switch 88 is on. If it is not ON, the lowering of the paper feed tray 60 is stopped. If it is on, in step # 152, it is determined whether or not the "auto descent mode" is set.
[0069]
If it is not the “auto descent mode”, the paper feed table 60 is lowered in step # 156. At this time, if the lower limit switch 82 is not turned on, it is lowered, and if the lower limit switch 82 is turned on, the lowering is stopped.
[0070]
If it is “auto descent mode”, it is determined in step # 154 whether or not the manual descent switch 88 is ON for 3 seconds or more. If it is not longer than 3 seconds, the paper feed table 60 is lowered in step # 156. If it is 3 seconds or longer, in steps # 158 and # 160, the paper feed table 60 is lowered until the lower limit switch 82 is turned on. If the lower limit switch 82 is turned on, the descent is stopped in step # 162. That is, if the time for which the manual lowering switch 88 is pressed is within 3 seconds, the sheet feed table 60 is lowered only while the manual lowering switch 88 is being pressed, and the lower limit is exceeded if the manual lowering switch 88 is pressed for more than 3 seconds. Lowers continuously to position.
[0071]
As described above, the printing machine 10 can stack a large number of printed sheets on the sheet feeding table 30 without interrupting the printing operation. Further, since the paper feed table 60 can be lowered a little, a small amount of paper can be efficiently supplied.
[0072]
In addition, this invention is not limited to the said embodiment, It can implement in another various aspect.
[Brief description of the drawings]
FIG. 1 is a front view of a printing machine showing an embodiment of the present invention.
FIG. 2 is a plan view of the printing machine of FIG.
FIG. 3 is a side view of the printing machine of FIG. A paper receiving apparatus is shown.
4 is a perspective view of a main part of a paper receiving device of the printing machine shown in FIG. 1;
FIG. 5 is a block diagram of the printing machine of FIG. 1;
FIG. 6 is a timing chart of the operation of the paper receiving device.
FIG. 7 is a basic flowchart of the paper receiving apparatus.
FIG. 8 is a detailed flowchart of the paper receiving apparatus.
FIG. 9 is a detailed flowchart of the paper receiving apparatus.
FIG. 10 is a detailed flowchart of the paper receiving apparatus.
FIG. 11 is a detailed flowchart of the paper receiving apparatus.
FIG. 12 is a basic flowchart of the sheet feeding device.
FIG. 13 is a detailed flowchart of the sheet feeding device.
FIG. 14 is a detailed flowchart of the sheet feeding device.
[Explanation of symbols]
2 CPU (control means)
3 I / O port
4 ROM
5 RAM
8 Operation panel
9 Printer body mechanism
10 Printing machine
12 Body
14 Paper Feeder (Paper Feeder)
16 Paper receiving unit (paper receiving device)
18,19 paper
20 version cylinder
22 Press roller
30 Paper cradle
31 Through groove
32 Paper receiving cover
34 Upper plate (guide plate support means)
36 Stop guide plate
37 protrusions
38 width guide plate
39 Protrusion
40 Elevator device (elevator means)
42 motor
44 chain
46, 47 Sprocket
48 Spring
50 Upper limit switch
52 Lower limit switch
54 Level sensor, shading sensor (paper height detection means)
58 Manual down switch
60 Paper feeder
62 Width guide plate
64 Paper feed ring
66 judgment board
68 Sensor plate
70 Elevator device (elevator means)
72 motor
74 chain
76,77 sprocket
78 Spring
80 Upper limit sensor
82 Lower limit switch
84 Paper presence sensor
88 Manual down switch
92 Output direction

Claims (7)

A paper tray (30) that is adjacent to the paper discharge portion of the printing machine main body (12) from which the printed paper (19) is discharged and extends substantially along the paper discharge direction (92) below the paper discharge portion. A stop guide plate (36) facing the paper discharge unit and extending in a direction substantially perpendicular to the paper discharge direction (92) above the paper tray (30), and the paper tray (30) It extends approximately parallel to the paper discharge direction (92) at a distance approximately equal to the width of the printed paper (19) discharged from the paper discharge unit between the paper discharge unit and the stop guide plate (36). In the paper receiving device (16) of the rotary stencil printing machine (10) having a pair of existing width guide plates (38),
Separately from the paper cradle (30), a guide plate support means (34) for holding the stop guide plate (36) and the pair of width guide plates (38) in a fixed position with respect to the paper discharge section. ,
Elevator means (40) for raising and lowering the paper cradle (30);
The height of the paper (19) stacked on the paper cradle (30) is detected, and is set above the lower ends of the stop guide plate and the width guide plate and below the paper discharge unit of the printer main body. Sheet height detection means (54) to be performed;
The height of the sheet (19) detected by the sheet height detecting means (54) is above the lower ends of the stop guide plate (36) and the width guide plate (38) and discharged from the printing machine main body (12). The elevator means (40) is operated when the height is higher than a reference height which is lower than the section, and the paper cradle (30) is moved so that the paper height is higher than the lower end of the width guide plate. Control means (2) for lowering ,
The guide plate support means (34) extends substantially along the paper discharge direction (92) above the paper discharge unit, and is rotatably fixed to the main body of the paper receiver (16). A paper receiving device for a rotary stencil printing machine, wherein the upper plate is configured to be openable above (30) .   A paper cradle (30) adjacent to the paper discharge section of the printing machine main body (12) from which the printed paper (19) is discharged and extending substantially along the paper discharge direction (92) below the paper discharge section. A stop guide plate (36) facing the paper discharge unit and extending in a direction substantially perpendicular to the paper discharge direction (92) above the paper tray (30), and the paper tray (30) It extends approximately parallel to the paper discharge direction (92) at a distance approximately equal to the width of the printed paper (19) discharged from the paper discharge unit between the paper discharge unit and the stop guide plate (36). In the paper receiving device (16) of the rotary stencil printing machine (10) having a pair of existing width guide plates (38),
  Separately from the paper cradle (30), a guide plate support means (34) for holding the stop guide plate (36) and the pair of width guide plates (38) in a fixed position with respect to the paper discharge section. ,
  Elevator means (40) for raising and lowering the paper cradle (30);
  The height of the paper (19) stacked on the paper cradle (30) is detected, and is set above the lower ends of the stop guide plate and the width guide plate and below the paper discharge unit of the printer main body. Sheet height detection means (54) to be performed;
  The height of the sheet (19) detected by the sheet height detecting means (54) is above the lower ends of the stop guide plate (36) and the width guide plate (38) and discharged from the printing machine main body (12). The elevator means (40) is operated when the height is higher than a reference height which is lower than the section, and the paper cradle (30) is moved so that the paper height is higher than the lower end of the width guide plate. Control means (2) for lowering,
  Grooves (31a, 31b) into which the lower end portions (37, 38) of the stop guide plate (36) and the pair of width guide plates (38) are inserted in the upper surface of the paper tray (30). A paper receiving device for a rotary stencil printing machine, comprising:   When the height of the paper (19) detected by the paper height detecting means (54) is higher than the reference height, the control means (2) detects the paper on the paper cradle (30) ( The elevator means (40) is operated until the sheet height detecting means (54) detects that the height of 19) is lower than the reference height. Paper receiving device for rotary stencil printing press.   The control means (2) operates the elevator means (40) to The paper height detecting means detects that the height of the paper (19) on the paper receiving base (30) is higher than the reference height even when the paper receiving base (30) is lowered for a predetermined time or more. 4. The paper receiving device for a rotary stencil printing press according to claim 3, wherein an error signal is sent to the printing press main body (12) when continuing.   When the control means (2) detects that the height of the paper (19) detected by the paper height detection means (54) is higher than the reference height for a predetermined time or more, the elevator means (40 The paper receiving device for a rotary stencil printing press according to claim 1 or 2, characterized in that   The said paper height detection means (54) is a detection means (54) which detects the side surface of the paper (19) piled up on the said paper cradle (30), The characterized by the above-mentioned. Paper stencil printing press paper receiver.   The sheet height detecting means (54) faces the sheet (19) stacked on the sheet receiving base (30) above the lower ends of the stop guide plate (36) and the width guide plate (38). 7. The rotary rotation according to claim 1, wherein the rotation sensor is a light shielding sensor (54) having a light projecting part (54 a) and a light receiving part (54 b) arranged at a position where Paper receiving device for stencil printing machine.

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