JP4398842B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus such as a stencil printing apparatus, and more particularly to a printing apparatus in which a plurality of feeding apparatuses having different speeds of a recording medium conveyance speed corresponding to a printing speed can be mounted.

For example, in a stencil printing apparatus, a main body sheet feeding device as a first sheet feeding device and a multi-stage sheet feeding device (sheet feeding bank) as a second sheet feeding device are simultaneously mounted and can be arbitrarily selected by the user on the operation panel. It is like that. The printing speed can be arbitrarily selected and set on the operation panel.
In the case where such different types of paper feeding devices are provided, the first paper feeding device is 130 sheets / minute (print setting speed 6 speed), and the second paper feeding device is 120 sheets / minute (print setting speed 5 speed). As described above, the number of shifts may be different in each sheet feeding device.

JP-A-5-318899 JP-A-6-199028 Japanese Patent Laid-Open No. 6-247027 JP-A-8-72380 JP-A-9-11597 JP 2004-167806 A

As described above, when the number of shifts is different in each paper feeding device, when setting the print mode on the operation panel, first, the sixth speed is selected as the print setting speed (also simply referred to as “printing speed”), and then the paper feeding device. When selecting a multi-stage sheet feeding device that is a second sheet feeding device in accordance with the size of the printing paper and starting printing, the second sheet feeding device is 120 sheets / minute (print setting speed 5 speed) Therefore, the transport speed (paper feed speed) is delayed with respect to the print speed, and the paper cannot be transported on the paper feeder side, causing jamming.
The operator can recognize that the paper feeding speed (conveyance speed) of the paper feeding device does not correspond to the printing speed only after a jam occurs, and then resets the print setting speed to the fifth speed.
For this reason, there is a problem that the jam processing is troublesome, and wasteful working time and wasteful printing paper are generated.

Also, when setting the print mode on the operation panel, first, when selecting the paper feed device, the multi-stage paper feed device as the second paper feed device is selected according to the size of the print paper, and the print setting speed is set to 5 speeds. After setting, before the start of printing, the paper feeding device is changed to the first paper feeding device, printing paper is set, and when printing is started, the initially set print setting speed of 5 speed (120 sheets / min) Printing starts.
In this case, since the first paper feeder is used, the performance cannot be utilized even though printing at a print setting speed of 6 speeds (130 sheets / min) is possible.
This is a malfunction that occurred because the operator did not confirm the print speed setting when the paper feeder was changed, but it is harsh and inadvertently forgotten to force this confirmation to the operator. Not sure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing apparatus that can prevent problems caused by the print setting speed and the transport speed of a selected feeding apparatus not matching each other.
It is another object of the present invention to provide a printing apparatus that can perform printing at the highest speed that can be surely enjoyed without requiring operator confirmation even if the feeding apparatus is changed.

In order to achieve the above object, according to the first aspect of the present invention, a plurality of feeding devices having different speeds of the conveyance speed of the recording medium corresponding to the printing speed can be mounted , and a stencil printing system configuration is provided. In the printing apparatus, a feeding apparatus selection / change means capable of selecting and changing a feeding apparatus to be used from among the plurality of feeding apparatuses, a printing speed display means, and a printing speed can be selected and changed. When the printing speed selection / change means and the feeding device once selected are changed, if the printing speed on the feeding device before the change is set to the maximum speed, the printing speed is automatically changed. Control means for changing to the maximum speed in the feeding apparatus, and an operation panel. The feeding apparatus selection / change means, the printing speed display means, and the printing speed selection / change means are integrated with the operation panel. Configured to above maximum speed automatically The outermost high velocity when changing and displaying on the print speed display unit.

According to the present invention, even when selecting the feeding device of different performance, it can be printed at the maximum printing speed that can be enjoyed in the conditions.
As a result, when the user changes the selection of the feeding device, the user can perform printing at the maximum speed without checking the setting of the printing speed, and the usability can be improved.

According to the present invention, it is possible to simplify the configuration.

According to the present invention, it is possible in a large amount printing costs inexpensive stencil printing apparatus, to obtain the above effect.

Hereinafter, a first embodiment of the present invention will be described as a reference example with reference to FIGS. 1 to 4.
First, based on FIG. 1, the outline of the structure of the stencil printing apparatus as a printing apparatus in this embodiment is demonstrated. Reference numeral 1 denotes a scanner (original reading apparatus) for reading an original image. A pressure plate 2 that can be opened and closed on the upper surface of the scanner 1 and an automatic original conveying apparatus for automatically and sequentially feeding a plurality of originals. (ADF) 3 is provided. A document size detection sensor 4 for detecting the size of the document is disposed inside the scanner 1.
In the plate making unit 5, the master 6 fed out from the roll state is pressed against the thermal head 8 by the platen roller 7, and conveyed while being perforated and made by rotation of the platen roller 7. The master 6 which has been subjected to plate making is conveyed by a pair of plate feeding rollers 10 toward a master clamper 11 provided on the outer peripheral surface of the printing drum 12, and its leading end is clamped by the master clamper 11 and the printing drum 12 is rotated. And wound around the outer peripheral surface of the printing drum 12. The master 6 is cut at a predetermined length by a cutter 9 composed of an upper blade 9a and a lower blade 9b.

The printing paper 13 as a recording medium is supplied from a main body paper feeding device (hereinafter also referred to as “first paper feeding device”) 14 as a feeding device or multistage feeding as a feeding device disposed at the lower part of the printing device main body. Paper is fed from a paper device (hereinafter also referred to as “second paper feeding device”) 15.
The first sheet feeding device 14 includes a sheet feeding table 16 that can be moved up and down, a sheet feeding roller 17, a pickup roller 18, and the like. The printing paper 13 is separated one by one in order from the uppermost one by a paper feeding roller 17 and a pickup roller 18 and fed to a registration roller pair 19.
The first sheet feeding device 14 has a performance of 6 speeds, the first speed is 60 sheets / minute, the second speed is 75 sheets / minute, the third speed is 90 sheets / minute, the fourth speed is 105 sheets / minute, The 5th speed is 120 sheets / minute, and the 6th speed is 130 sheets / minute. These transport speeds correspond to the printing speed of each stage.

The second sheet feeding device 15 includes sheet feeding cassettes 20 and 21, a sheet feeding roller 22 and a pickup roller 23 disposed in each. The printing paper 13 accommodated in each of the paper feeding cassettes 20 and 21 is separated and fed one by one from the uppermost one by a paper feeding roller 22 and a pick-up roller 23, and a pair of registration rollers is provided via a conveying roller pair 24. It is conveyed toward 13.
The second sheet feeding device 15 has a performance of 5 speeds, the first speed is 60 sheets / minute, the second speed is 75 sheets / minute, the third speed is 90 sheets / minute, the fourth speed is 105 sheets / minute, The 5th speed is 120 sheets / min. These transport speeds correspond to the printing speed of each stage.

After the printing paper 13 is temporarily stopped by the registration roller pair 19 to correct the oblique shift, it is conveyed to the printing pressure section between the printing drum 12 and the press roller 25 as the pressing means at a predetermined timing.
In the printing pressure section, the printing paper 13 is pressed against the printing drum 12 by the press roller 25. The ink supplied by an ink supply means (not shown) provided inside the printing drum 12 bleeds through the hole of the printing drum 12 and the master 6 punching portion by printing pressure, and is transferred to the printing paper 13 to transfer the image. It is formed.
The printed printing paper 13 is conveyed while its back surface is sucked by a paper discharge conveying device 26 having a suction fan, and is sequentially discharged and stacked on a paper discharge tray 27. The used master 6 is peeled off from the outer peripheral surface of the printing drum 12 by the plate discharge roller pair 29 of the plate discharge section 28 and stored in the plate discharge storage box 30.

As shown in FIG. 2, the stencil printing apparatus has an operation panel 32, and information input (set) by the operation panel 32 is output to the control means 33. The control means 33 is a microcomputer having an I / O interface, CPU, ROM, RAM and the like. The control means 33 controls the first paper feed device drive motor 50 and the second paper feed device drive motor 51 via a transmission (not shown) based on the information input from the operation panel 32, and thereby, in each paper feed device. The speed is obtained.
As shown in FIG. 3, the operation panel 32 includes a plate making start key 34, a printing start key 35, a trial printing key 36, a stop key 37, a numeric key 38, a clear key 39, a display device 40 including a 7-segment LED, and an LCD. A display device 41 as a printing speed display means, a paper feeding device selection key 42, a printing speed selection key 43 as a printing speed selection / change means, and the like are provided.
Various numerical values are entered in the display device 40, and the display device 41 has a hierarchical structure and displays various information.

When the paper feeding device selection key 42 is pressed, the first paper feeding device 14 and the second paper feeding device 15 are displayed on the display device 41, and one of them can be selected on the screen of the display device 41. Strictly speaking, the second paper feeding device 15 is further divided into a paper feeding cassette 20 and a paper feeding cassette 21 so that either one can be selected. When the feeding device is changed after the selection is made, the same procedure is performed by pressing the clear key 39.
The paper feeding device selection key 42 and the display device 41 constitute a feeding device selection / change means.
When the print speed selection key 43 is pressed, six stages of printing speeds are displayed on the display device 41 (the first speed is 60 sheets / minute, the second speed is 75 sheets / minute, the third speed is 90 sheets / minute, and the fourth speed is 105 sheets / minute. 5th speed is 120 sheets / minute, and 6th speed is 130 sheets / minute), which can be selected on the screen of the display device 41. When the printing speed is to be changed after the selection is made, the same procedure is performed by pressing the clear key 39.

A control operation for preventing the “print setting speed and the speed (conveyance speed) of the selected paper feeding apparatus from becoming inconsistent” in the stencil printing apparatus will be described with reference to the flowchart of FIG.
When the power is turned on, the printing speed set last time or the normal setting value is displayed on the display device 41 (S1). Since the performance of the first paper feeder 14 is 130 sheets / minute, the printing speed is 6 speeds (6 stages), and the performance of the second paper feeder 15 is 120 sheets / minute, so the printing speed is 5 speeds (5 stages). (S2). In the initial setting, a paper feeding device is selected on the operation panel 32 (S3).
After the selection, the control means 33 checks whether or not the paper feeding device has been changed (S4), and if not, checks whether or not the paper feeding device is the first paper feeding device (S5). In the case of the first paper feeder 14, the sixth speed (six-step printing speed) is displayed on the display device 41 of the operation panel 32 (S6). In this case, together with or instead of the 6th speed, the printing speed at each stage may be displayed as the number of sheets per unit time “number of sheets / minute” (hereinafter the same).
The operator presses the printing speed selection key 43 to select a desired printing speed from the first to sixth speeds. If the printing speed in S1 is maintained as it is and the printing speed in S1 is in the range of 1 to 6, the above printing speed selection operation is not necessary.

If the paper feeding device is changed in S4, the control unit 33 checks whether the changed paper feeding device is the first paper feeding device 14 (S7). Displays on the display device 41 of the operation panel 32 that the first paper feeder 14 has been selected (S8). Next, it is checked again whether the paper feeding device is the first paper feeding device (S5). In the case of the first paper feeding device 14, the sixth speed is displayed on the display device 41 of the operation panel 32 (S6).
In S7, if it is not the first paper feeding device 14, the display device 41 of the operation panel 32 displays that the second paper feeding device 15 has been selected (S9). In S5, when the paper feeding device is not the first paper feeding device 14, the fifth speed (5-step printing speed) is displayed on the display device 41 of the operation panel 32 (S10).
The operator presses the printing speed selection key 43 to select a desired printing speed from 1 to 5 speeds. If the printing speed in S1 is maintained as it is and the printing speed in S1 is in the range of 1 to 5 speeds, the selection operation of the printing speed is not necessary.
With such printing speed display control, it is possible to prevent a jam from occurring because the set printing speed does not match the speed of the paper feeding device.

Next, a second embodiment will be described. Since the configuration is the same as that of the above embodiment, the description is omitted, and only the main part is described.
The object of the present embodiment is to always allow printing at the “maximum speed that can be enjoyed” even if the paper feeding device is changed. The control operation in this embodiment will be described based on the flowchart of FIG.
The control means 33 checks whether or not the paper feeding device has been changed (S1). If the paper feeding device has been changed, the control means 33 subsequently checks whether or not it is the first paper feeding device 14 (S2). If it is the first paper feeding device 14, the display device 41 of the operation panel 32 displays that the first paper feeding device 14 has been selected (S3).
Next, it is checked again whether the paper feeding device is the first paper feeding device 14 (S4). If the paper feeding device is the first paper feeding device 14, the sixth speed (six-step printing) is displayed on the display device 41 of the operation panel 32. Speed) is displayed (S5).
Next, it is checked whether or not the print setting speed before the change of the paper feeding device was the highest speed (S6), and if it is the highest speed, the printing speed is set to the highest speed in the first paper feeding device 14. At the same time (S7), the maximum printing speed is displayed on the display device 41 (S8).

If it is not the first paper feeding device 14 in S2, it is displayed on the display device 41 of the operation panel 32 that the second paper feeding device 15 has been selected (S9). If it is not the first paper feeder 14 in S4, the fifth speed (five-step printing speed) is displayed on the display device 41 of the operation panel 32 (S10).
With such automatic printing speed change control, printing at the maximum speed can be performed without the operator confirming the setting of the printing speed when the selection of the paper feeding device is changed.

  In each of the above-described embodiments, the specific number of stages and the number of sheets per specific unit time are exemplified as the printing speed, but the present invention is not limited to this.

1 is a schematic front view of a stencil printing apparatus as a printing apparatus according to a first embodiment of the present invention. It is a control block diagram. It is a principal part top view of an operation panel. It is a flowchart which shows control operation. It is a flowchart which shows the control action in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 14 1st sheet feeder as feeding apparatus 15 2nd sheet feeder as feeding apparatus 32 Operation panel 33 Control means 41 Display apparatus as printing speed display means

Claims (1)

In a printing apparatus having a configuration of a stencil printing method, which can be equipped with a plurality of feeding devices having different speeds of the recording medium conveyance speed corresponding to the printing speed,
Feeding device selection / change means capable of selecting and changing a feeding device to be used from among the plurality of feeding devices, a printing speed display means, and a printing speed selection / change capable of selecting and changing the printing speed. If the printing speed of the feeding device once changed and the printing speed of the feeding device before the change is set to the maximum speed, the printing device automatically changes the printing speed. Control means for changing to the maximum speed, and an operation panel, the feeding device selection / change means, the printing speed display means and the printing speed selection / change means are configured integrally with the operation panel, A printing apparatus characterized in that when the speed is automatically changed to the maximum speed, the maximum speed is displayed on the printing speed display means .

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