JPH0416372A - document editing printing device - Google Patents

Abstract

PURPOSE:To prevent wrinkling and edge-buckling of printing paper by selecting a suitable sequence for automatic sheet-feeding in accordance with the thickness of the paper. CONSTITUTION:In the case of automatic sheet-feeding of normal paper, diagonal feeding can be corrected by a method wherein a sheet of paper 40 fed diagonally through a pickup roller 23 is fed back, after being caught between a platen 30 and pressure roller 31, by turning reversely the platen 30 and is held, being slackened, between a feed roller 25 and the platen 30, and subsequent feeding of said paper is made, starting from that point. In the case of thin paper, the sheet of paper 40 is caught between the platen 30 and the pressure roller 31 after being fed through the pickup roller 23, and is fed back by turning reversely the platen 30 and after this, the platen 30 is turned in the normal direction by an extent smaller than the extent of the reverse turning, and thereby slackness of the paper can be lessened. Thereby the sheet of paper 40 can be prevented from being wrinkled or buckled at the edge on the front end.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document editing printing device, and particularly to paper feeding control of a printing device equipped with an automatic paper feeding device.

[Conventional technology]

Conventionally, as a means to prevent paper from skewing in the hopper section, the platen is stopped when paper is fed, the paper hits the platen and is bent, and the leading edge of the paper is placed on the platen. A method has been proposed in which the paper is conveyed to the printing start position by rotating the paper feeding roller and platen of the hopper section of the automatic paper feeding device while maintaining the deflected state of the paper.

(For example, Utility Model Publication No. 1-23818) [all problems that the invention attempts to solve! [Problem] In the above-mentioned conventional technology, in order to prevent the paper from being tilted when it starts to bite into the platen, the platen is stopped and the paper is pressed against it to bend it. In other words, if paper with very low stiffness such as thin paper or Japanese paper is used, the stiffness may break when it hits the platen, or if it hits the platen at an angle. Various problems occur depending on the state in which the leading edge of the paper hits the platen, such as the so-called edge folding phenomenon in which either the left or right edge is bent.6 Therefore, the purpose of the present invention is to The purpose is to change the paper feed control means and eliminate the various problems (folds, edges, wrinkles, etc.) that occur in conventional devices when automatically feeding thin paper.

[Means to solve the problem]

In order to achieve this object, the present invention is to send the paper stored in a hopper section of a printing device out of the hopper section by rotating a pickup roller, a feed roller, and a platen by forward rotation of a driving means, and to send out the paper from the hopper section. After the tip has passed.

After conveying the sheet to a position where it passes the platen and pressure roller, the driving means is stopped, the driving means is caused to rotate in the reverse direction to rotate the platen, and the sheet is returned to a position where it is removed from the platen and the pressure roller, and then stopped. Here, the feed roller rotates only in one direction (forward rotation) (for example, it has a built-in one-way clutch), and the paper bends between the feed roller and the platen, and the paper falls under its own weight, and the leading edge of the paper touches the platen. become parallel. Furthermore, a first paper feed control means for forwardly rotating the pickup roller, feed roller, and platen by a driving means and conveying the sheet to a printing start position; a second paper feed control means for feeding the paper from a hopper unit, and after the leading edge of the paper passes a sensor, passing through a platen and a pressure roller and transporting the paper to a printing start position; The pickup roller, feed roller, and platen are rotated by forward rotation of the drive means, and the paper is sent out from the hopper section. After the leading edge of the paper passes the sensor, the paper is moved to the position where it passes the platen and pressure roller. After conveying the platen, the driving means is stopped, and the driving means is reversely rotated to rotate the platen.
The sheet is returned to a position where it is removed from the platen and the pressure roller and stopped, the sheet is bent between the feed roller and the platen, and the platen is further rotated by the forward rotation of the driving means, so that the amount of rotation is less than the amount of reverse rotation of the driving means. After rotating the paper in the forward direction by a certain amount to reduce the amount of deflection of the paper, the pickup roller and feed roller are rotated.

A third paper feed control means for forwardly rotating the platen by a drive means and conveying it to a printing start position is provided, and further, a paper feed control switching means for switching the paper feed control means is provided.

The present invention is characterized in that three types of automatic paper feed control are selectively executed depending on the thickness of the paper according to the paper thickness information of the print control means of the document editing and printing device.

[Effect]

Plain paper (represented by PPC paper, with a paper weight of approximately 50k)
In the case of automatic paper feeding for (paper larger than Because the leading edge of the paper is aligned parallel to the platen due to free fall, and the feed roller only rotates in one direction, the paper that is returned by the reverse rotation of the platen remains bent between the feed roller and the platen. This prevents skew feeding by feeding the paper.

Furthermore, since this type of paper is relatively thick and stiff, there is no need to worry about wrinkles or folding of the paper edge.

Furthermore, in the case of thin paper, if some skew is acceptable, the paper is fed from the pickup roller and automatically fed in a continuous rotating motion to the printing start position to prevent folds and wrinkles at the leading edge of the paper. . Furthermore, in order to prevent skew feeding, after feeding the paper from the pickup roller,
- First, the paper that was caught between the platen and the pressure roller is returned by rotating the platen in the reverse direction, and then the leading edge of the paper is aligned parallel to the platen by free falling, and then the platen is moved by an amount less than the amount returned by the reverse rotation as described above. By rotating the paper in the forward direction to reduce the amount of deflection of the paper, it is possible to prevent the weakly stiff paper from wrinkling due to the above-mentioned deflection.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, the configurations of a printing device and an automatic paper feeding device that implement the present invention will be explained with reference to FIGS. 2 and 3. Main control circuit l is CPU
2. Storage part 3. Interface section with host device 4. Equipped with various drivers 5 to 8.

It receives power from the power supply unit 10, receives instructions from the operation panel 11, or exchanges data with the host device, and also receives electricity from a paper end sensor (PE sensor) 12 that detects the presence or absence of printing paper. The platen 30 is moved while inputting and referring to a signal and an electric signal from a home position sensor (HP sensor) 15 that detects passage of the movement reference position (home position) of the print head 9 mounted on a carriage (not shown). The paper feed motor (L) is the drive source that rotates and moves the printing paper in the length direction.
F motor) 14 is controlled. The print head 9 has the ability to print a pattern of 24 dots in the paper feed (vertical) direction in one-way printing.

The rotation of the SP motor 13 is converted by a timing belt, a wire rope, a rack and pinion, etc. to reciprocate the carriage in the width direction of the printing paper.

The storage unit 3 is equipped with a control program storage unit 3a for controlling the printing apparatus, and a paper feed control program for storing an automatic sheet feeding sequence according to the present invention, and the CPU 2 cooperates with the storage unit 3. do.

The carriage carries the print head 9 and is driven by the SP motor 13 to reciprocate in the width direction (horizontal direction) of the printing paper, and also includes a mechanism for driving the ink ribbon.

The printing device is equipped with an operation panel 11, which includes a power lamp that indicates that the printing device performs test printing independently and that power is being correctly supplied to the printing device, and a power lamp that indicates that the printing device is abnormal (abnormality). It is equipped with an alarm lamp, etc. that blinks when the condition occurs, and as mentioned above, the C
We are collaborating with PU2.

Next, the operation of C3F20 will be explained.

The C3F20 includes a hopper section 28 that stores the paper 40, and the hopper section 28 includes a pressure plate 28a and a pressure spring 28b to enable the paper 40 to be fed, and is lightly pressed by the sub-pick roller 24. CPU
2, the C5F motor 21 rotates the pickup roller 23 in the forward direction, feeds out the paper 40, separates it one by one with the separator 26, and transfers it to the feed roller 25.
, sub-feed roller 27. Paper chute 33, platen 30. It passes through pressure rollers 31 and 32 and is sent to a printing start position slightly above the print head 9.

Here, the feed roller 25 is connected to the C3F motor 21 and rotates in conjunction with the pickup roller. Further, the feed roller 25 is equipped with an internal Young-way clutch, and is configured to rotate only in the feeding direction (forward rotation) of the paper 40, and the sub-feed roller 25
Reference numeral 7 denotes an auxiliary row that rotates as the feed roller 25 rotates. 20a to 20d are guide plates, and paper 4
It plays the role of guiding the passage of 0. Eject roller 2
Reference numeral 9 denotes an auxiliary roller that controls the conveyance of the paper 40 to be discharged.

The process flowchart of FIG. 1 and FIG. 4 regarding the automatic paper feeding control according to the present invention with the above configuration.

The explanation will be made using the paper feeding sequence explanatory diagrams of FIGS. 5 and 6, the word processor system block diagram of FIG. 7, and the example of the paper thickness designation screen by the word processor of FIG. 8.

As shown in FIG.
A display device 1t7 that displays character information etc. input from
0, a printing device 80, and an overall control device 50 that controls all of these.

The overall control device 150 includes a temporary storage means (page memory: PM) 54 that stores character information, control instructions, management information, etc.
, a display controller (CRTC) 57, a refresh memory (RM) 56, and a character generator (C
G) 55 and the first .55 which is an external storage device. It includes a second flexible disk 52, 53 and a main control circuit 51.

The main control circuit 51 is mainly composed of a CPU, its control functions are determined by programs stored in a built-in storage device, and it controls the entire document during document editing and printing. The first flexible disk 52 stores a system program and a kana-kanji conversion dictionary, and the second flexible disk 53 stores previously created documents or newly created document information. . The page memory 54 temporarily stores document information input from the input bag [60] or document information read from the second flexible disk 53. The refresh memory 56 stores the character string of the document to be displayed on the display device 70 in the form of an address code indicating a character pattern storage address in the character generator 55, and the character generator 55 stores one character pattern. . The display controller 57 reads a character string to be displayed from the refresh memory 56, converts it into a character pattern using the character generator 55, and displays the document character pattern on the display device 70.

The printing bag [80 receives a signal obtained by converting document information stored in the second flexible disk 53 or page memory 54 into a character pattern using the character generator 55, and prints a document.

In the above configuration, the main control circuit 51 has a ROM that stores a part of the program as part of the internal storage device, and when the power is turned on, the main control circuit 51 stores data from the first flexible disk 52 in its own RAM according to the program in the ROM. After transferring the program to the area, it is ready to operate as a word processor.

When the document editing mode is set, the main control circuit 5
1 executes document editing formatting processing for document editing. In this document Ig collection formatting process, formatting items are displayed on the display device 70, and formatting information input by the operator from the input device 60 is stored. Document editing format setting items include paper size, paper direction, top, bottom, left, and right margin values9.
There are font size, character spacing, line spacing, etc. Character information input after document editing formatting is managed according to this format information.

Next, when the document print mode is set, the main control circuit 51 executes document print format setting processing for document printing.

In this document print format setting, format setting items are displayed on the display device 7.
o, and stores the format information input by the operator from the input device 60. Document print format settings include:
Print target document name or document number, number of print copies, print page range 1
For pagination, range 1 For pagination, start number, paper feed method (automatic/manual)
.

There are printing direction specifications, etc. Then, the main control circuit 76 refers to the document editing format and document printing format information and executes document data printing control processing.

When the print key on the input device 60 is input after setting the document print format, the main control circuit 51 controls the printing device 80.
Sends the control code for printing to.

Next, automatic paper feeding control according to the present invention will be explained.

First, it is determined whether the print process 100 has been selected, and if not, another process 120 is executed.

Next, the printing condition setting process 110 and paper thickness designation process 130 described above are executed. Identification of the paper thickness is sent to the printing device 80 using an escape command (ESC).

If the medium specification on the print condition setting screen in FIG. 8 is "O: plain paper", the paper 40 to be fed is stiff, so automatic paper feeding including skew correction control by reverse movement of the platen 30 is performed. Paper feed control processing 170 is executed in the control 1 routine. The automatic paper feeding sequence is shown in Figures 4 to 6.
This will be explained below.

C5F motor 21. The LF motor 14 is driven to rotate the pickup roller 23 and the paper 40 is transferred to the separator 26.
The paper is separated from the paper 40, passes through the feed roller 26° and the sub-feed roller 27, and is transported from the time when the C5F sensor 22 detects the paper 40 to a point ttW (nl steps) slightly past the pressure contact point between the platen 30 and the pressure roller 31. The C8F motor 21. The LF motor 14 is stopped, and the pickup roller 23. Feed roller 25. Stop the rotation of the platen 30. (Processing 171 to Processing 174) C8
If the C3F sensor 22 does not detect the paper 40 within a predetermined time after rotating the F motor 21.

If the paper jams on the way or the paper cannot be fed by the pickup roller 25, error handling such as paper jam etc. 1
Execute 90. Next, the LF motor 14 is reversely rotated to drive the platen 30 to move the paper 40 back n2 steps to remove the paper 40 from the platen 30 and pressure roller 31, and the LF motor 14 is stopped. (The amount of paper 40 returned is n
The relationship is l>02. Processing 175. Process 176) At this time, the paper 40 cannot rotate in the reverse direction because the feed roller 25 has a built-in one-way clutch, and the paper 40 becomes free between the feed roller 25 and the platen 30, and the leading edge of the paper 40 falls freely between the platen 30 and the feed roller 25. They are aligned parallel to each other, stop at the pressure contact portion with the pressure roller 31, and are held in a bent state between the feed roller 25 and the feed roller 25 as shown in FIG. Next, in process 177, the LF motor 14. C3F motor 21
by rotating the pickup roller 23 in the normal direction. Feed roller 25. The platen 30 is rotated, and the sheet 40 is conveyed in a bent state through the print head 9 to the print start position. (n
Step 6) After that, the print data printing process 180. The printing end process determination 190 is executed and the process ends.

Next, a case where the medium specification is "rl:i1 paper" will be explained. When the thin paper is specified, determination process 1 of whether or not to perform skew correction by reverse rotation operation of the LF motor 14
Do 40. The ESC command may be used as described above to determine whether or not to perform this skew correction, but in the case of the present invention,
For convenience, it is assumed that the printing device 80 is provided with a changeover switch, and one of the switches is set from the operation panel 11 or the like. First, processing 160 of the automatic paper feed control 3 will be described in the case where skew correction is performed.

Processes 161 to 166 are based on the automatic paper feed control described above.
Similarly to processing 171 to processing 176 of the routine, the C8F motor 21 and the LF motor 14 are stopped, and the pickup roller 23. Feed roller 25. The sheet 40 is fed by the platen 30. Paper 4 as shown in Figure 5
0 is parallel to the platen 30 and stopped at the pressure contact part with the pressure roller 31.
The LF motor 14 is driven to rotate only the platen 30 forward by n3 steps. Here, the feed amount of paper 40 is n2>n3
The relationship is a value smaller than the amount of reverse rotation of the LF motor 14,
As shown in FIG. 6, the amount of deflection of the paper between the feed roller 25 and the platen 30 is adjusted. This prevents the bending part of the paper 40 that occurs when the paper is thin paper from wrinkling at the pressure contact area between the platen 3o and the pressure roller 31, and prevents the skew correction during the reverse feed operation of the LF motor 14 described above. This is the solution. Thereafter, the C5F motor 21 moves the paper 40 to the printing start position. The pickup roller 23 is driven by the LF motor 14. The feed roller 25° and the platen 30 are rotated in the normal direction, processing 169 is executed, and print data printing processing 180. The printing end process determination 190 is executed and the process ends.

In addition, the automatic paper feed control 2 of the process 150 in which skew correction is not performed
is selected, in process 151 the C5F motor 21.
The pickup roller 23 is driven by the LF motor 14. Feed roller 25. Rotate the platen 30 in the normal direction and perform processing 15.
In step 2, the presence or absence of the paper 40 is determined by the CSF sensor 22, and paper feeding processing 153 of n5 steps to the printing start position is performed.
and print data printing process 180. The printing end process determination 190 is executed and the process ends. In this case, since the sheet feeding operation is a series of continuous operations, it is possible to perform the sheet feeding operation in which the end face of the leading edge portion of the sheet is less likely to be folded.

〔Effect of the invention〕

As described in detail above, according to the present invention, in the automatic paper feeding method of a printing device that uses platen winding, the automatic paper feeding sequence can be selected depending on the thickness of the paper, so in the case of plain paper, Since the paper is relatively stiff, we focus on paper feeding with skew correction, and in addition, in automatic paper feeding of thin paper, which is in high demand these days, we prevent wrinkles and paper edge folds that occur at the leading edge of the paper. can provide optimal automatic paper feeding operation.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, in which the main control circuit C
FIG. 2 is a flowchart of a program executed by the PU, and FIG. 2 is a control circuit block diagram of the printing apparatus. Figure 3 shows the printing device and automatic paper feeding operation. Figures 4 to 6 are schematic diagrams illustrating the automatic paper feeding operation, Figure 7 is a block diagram of a word processor, and Figure 8 is a display screen of a display device displaying a print condition setting screen. It is a figure which shows an example. l...Main control circuit, 2...CPU, 3...Storage unit, 20.C5F, 23..Pickup roller, 25.
・Feed roller, 27...Sub feed roller, 5
0Figure 2Figure 6Figure 8

Claims (1)

[Claims] 1. A hopper unit that stores paper to be fed, a pickup roller that sends out the paper from the hopper unit, and a feed roller that can rotate in only one direction to convey the fed paper to the platen. a pressure roller in pressure contact with the platen, a sensor arranged between the feed roller and the platen to detect passage of the paper, driving means for driving each of the above, and a control means for controlling the whole. a printing device comprising: an input means for inputting character information and control information; a display means; a storage means; executing a document editing process according to the character information and control information input from the input means; A document editing/printing apparatus comprising: a document editing means for displaying an edited document on the display means and storing it in the storage means; and a print control means for printing the contents of the storage means, the hopper section of the printing apparatus comprising: The pickup roller, feed roller, and platen are rotated by the forward rotation of the drive means to feed the stored paper from the hopper section. After the leading edge of the paper passes the sensor, the position where the platen and pressure roller are pressed is detected. After conveying the paper to a position beyond which the paper passes, the drive means is stopped, the drive means is rotated in the opposite direction to rotate the platen, the paper is returned to a position where the paper is removed from the press contact position between the platen and the pressure roller, and the paper is stopped. a first paper feed control means for deflecting the paper between the feed roller and the platen, further rotating the pickup roller, the feed roller and the platen by forward rotation of the drive means, and transporting the paper to a printing start position; and forward rotation of the drive means. The pickup roller, feed roller, and platen are rotated to send out the paper from the hopper section, and after the leading edge of the paper passes the sensor, it passes through the pressure contact position between the platen and the pressure roller and is transported to the printing start position. A paper feed control means is provided, and the paper stored in the hopper section of the printing device is sent out from the hopper section by rotating a pickup roller, a feed roller, and a platen by forward rotation of the drive means, and the paper is sent out from the hopper section until the leading edge of the paper hits the sensor. After passing the sheet, the driving means is stopped, the driving means is rotated in the opposite direction, the platen is rotated, and the sheet is brought into pressure contact between the platen and the pressure roller. The paper is returned to the position where it is removed from the position and stopped, the paper is bent between the feed roller and the platen, and the platen is further rotated by the forward rotation of the driving means, and the platen is rotated in the forward direction by an amount smaller than the amount of reverse rotation of the driving means. rear,
A third paper feed control means for transporting the pickup roller, feed roller, and platen to a printing start position by rotating them in the forward direction by a drive means, and paper thickness information for setting paper thickness information in the print control means of the document editing and printing device. A document editing/printing device comprising: a thickness setting device; and a paper feed control switching device for switching the paper feed control device based on the paper thickness information. 2. In claim 1, when the thickness of the paper is more than a predetermined thickness, the first paper feed control means is used, and when the paper is less than the predetermined thickness, the second paper feed control means is used. A document editing/printing device characterized in that: 3. In claim 1, when the thickness of the paper is more than a predetermined thickness, the first paper feed control means is executed, and when the paper is less than the predetermined thickness, the third paper feed control means is executed.
A document editing and printing device characterized in that it executes a paper feed control means.