JPH106487A - Inkjet recording control method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To perform a recording and reading operation in a wide area of a recording medium and a reading original while maintaining a uniform distance between the recording head and the recording medium and the reading head and the reading original, and obtain a high-quality image. Provided is an inkjet recording control system capable of performing recording and reading. SOLUTION: A printing operation in a state other than a supporting state provided on a feeding member and a discharging member for scanning a printing medium 9 provided near a printing head is prohibited. When performing printing, high-quality printing and reading are performed in a wide area of the printing medium 9 by selecting an optimum element array from the printing element arrays 23 of the print head.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording control method for an ink jet recording apparatus which performs recording by discharging ink onto recording paper, and more particularly, to recording control for improving recording quality in a lower end region of a recording medium. About the method. More specifically, the present invention relates to an ink jet recording apparatus in which a recording head and a reading head are provided on the same support, and performs a recording operation and a reading operation. About.

[0002]

2. Description of the Related Art In a recording apparatus of an ink jet recording system which performs recording by discharging ink from a recording head to a recording medium, the recording medium has a property of waving due to an ink component immediately after recording. For this reason, in order to stabilize the distance between the recording head and the recording medium and secure the quality of recording, the recording medium is supported immediately before and after the recording head in the recording medium transport direction. It is a general configuration to provide a conveying member that conveys the recording medium to a position facing the recording head immediately before the recording head upstream of the recording head and a discharge member for the recording medium downstream of the recording head. I have. Also, in order to avoid the undulation of the recording medium, so as not to reduce the recording quality of the undulating recording medium immediately after recording and contact the recording head, or to make the running of the recording medium unstable. The recording medium at the recording position is configured to float in the air so as not to come into contact with other members.

Further, a recording apparatus having a reading function in which a reading head is provided on a support member of a recording head and a document is read using a conveyance path of a recording medium at the time of recording has been devised. A reading head fixed on a support, detachably mounted on the support, or replaced with a recording head and mounted on the support has been devised.

However, in the above configuration, a recording medium,
At the upper end and the lower end of the original as read, a single support state is provided in which only one of the feed member and the discharge member is supported. The distance between the element facing the element and the recording medium, or the distance between each reading element of the reading head and the document located at the position opposing each element may become non-uniform, and the recording quality and reading quality may decrease.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. According to the present invention, provided in the vicinity of a recording head or a reading head, a recording medium, a recording and reading operation in a state other than the both supported states supported by both a feeding member and a discharging member for scanning a read document are prohibited, and a reading operation is prohibited. And, when recording on the recording medium, the upper and lower ends of the document, or when reading, the recording element row of the recording head, of the reading element row of the reading head,
By selecting an optimal element array, it is possible to perform high-quality recording and reading over a wide area of a recording medium and a document to be read.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be specifically described below based on examples. (Embodiment 1) FIG. 1 is a perspective view of a recording apparatus according to a first embodiment of the present invention.

Reference numeral 1 denotes a printing head having a printing element array in which a plurality of printing elements are arranged in a single row, and has a built-in printing ink. The recording head 1 is arranged on a carrier 2 and is electrically connected to a recording device control unit (not shown) via an electric joint 3. Carrier 2 is chassis 4
It is pivotally supported by a guide shaft 5 provided above, is slidably mounted on a guide rail 6, and is drivingly connected to a drive motor 8 via a belt 7.

The chassis 4 is provided with an upper guide 10 and a lower guide 11 for guiding the recording medium 9 before recording, and the upper guide 9 is provided with a paper sensor 12 for detecting the presence or absence of the recording medium. . The recording head 1 is mounted on the chassis 4.
Feed roller 13 for feeding the recording medium 9 immediately before
, A pinch roller 14 is rotatably provided at a position opposed thereto. Further, a spur 15 and a position facing the spur 15 are provided on a guide rail 6 provided immediately after the recording head 1, and a paper discharge roller 16 is rotatably provided on the chassis 4. The pinch roller 14 and the paper discharge roller 16 are configured to be urged by the feeding roller 13 and the spur 15 by elastic members (not shown), respectively.
The feed roller 13 is drivingly connected to a drive motor 18 via a gear 17 provided on the chassis 4, and the paper discharge roller 16 is provided on a gear 19 provided at an end of the paper feed roller 13 and on the chassis 4. It is drivingly connected to the paper feed roller 13 via a gear train 20 provided. The recording medium 9 at a position facing the recording head 1 is in a state of floating from the chassis 4 without contacting other members.

A recovery member 21 of the recording head 1 and a driving cam 22 connected thereto are provided at a position on the chassis 4 where the recording medium 9 is to be avoided, and a gear portion of the driving cam 22 is drivingly connected to the gear 17. doing. Hereinafter, the operation of the recording apparatus having the above configuration will be described.

When the recording medium 9 is inserted between the upper guide 10 and the lower guide 11 in the direction of arrow A in the figure, the paper sensor 12 detects the presence or absence of the recording medium 9. Thereafter, the rotation of the drive motor 18 is controlled by the gear 17 to feed the paper feed roller 13.
And the recording medium 9 is fed to a recording position facing the recording head 1 by the pressing of the feed roller 13 and the pinch roller 14, and the leading end of the recording medium 9 is pressed by the spur 15 and the discharge roller 16. Sent to.

At the time of non-recording, the carrier 2 stands by at a standby position where the recording element array of the recording head 1 is located at the recovery member 21. After the recording medium 9 reaches the predetermined recording position by the feed roller 13, The carrier 2 is scanned on the recording medium 9 by the rotation of the drive motor 8, and a recording signal is transmitted to the recording head 1 to perform recording. After the printing of one row is completed, the printing medium is scanned in the direction of arrow A by driving the drive motor 18. This operation is repeated to perform predetermined recording.

After the lower end of the recording medium 9 has passed the paper sensor 12, the recording medium 9 is scanned within a range where the lower end of the recording medium 9 does not exceed the feeding roller 13, and the recording operation is completed by the recording head 1. Then, the recording ends.

After the recording is completed, the carrier 2 returns to the standby position, and the recording medium 9 is discharged to the outside of the recording apparatus by the spur 15 and the discharge roller 16.

Hereinafter, the control contents of the first embodiment of the present invention will be described with reference to the flowchart shown in FIG.

When a recording start command is received from the host outside the recording apparatus in step S101, in step S102,
The paper sensor 12 determines whether the recording medium 9 is set in the recording device. At this time, if the paper sensor 12 is turned off, that is, if the recording medium 9 is not set, the process proceeds to step S103 and the recording operation is not performed.

If it is determined in step S102 that the paper sensor 12 is turned on, that is, the recording medium 9 is set, the process proceeds to step S104 to perform a cueing operation of the recording medium. The cueing operation refers to feeding the leading end of the recording medium 9 to the position of the spur 15 and the discharge roller 16. In this state, the recording medium 9 is held upstream and downstream of the recording head 1. The distance between each recording element and the recording medium is kept uniform.

Next, in step S105, a recording signal is transmitted to the recording head 1 while moving the carrier 2 along the guide shaft 5 by the rotation of the driving motor 8, and the recording medium 9 is transmitted.
The recording for one line is performed while discharging ink.

Next, the operation proceeds to step Sl06, where a control unit (not shown) determines whether or not print data remains. If no print data remains, control proceeds to step Sl10.
7, the recording is completed, and the recording medium 9 is discharged. The discharge operation is performed by the feed roller 13 and the discharge roller 16 by the rotation of the drive motor 18.

If the print data remains in step S106, the flow proceeds to step S108, in which the recording medium 9 is scanned by rotating the drive motor 18 to a predetermined position.

Next, in step Sl09, the position of the lower end of the recording medium is confirmed. The determination is made based on whether the lower end of the recording medium detected by the paper sensor 12 is upstream or downstream of the feed roller 13 in the recording medium scanning direction. If the lower end of the recording medium 9 is located upstream of the feed roller, the process returns to step S105 to repeat the above operation. On the other hand, if the lower end of the recording medium 9 is located downstream of the feed roller, the distance between each recording element of the recording head 1 and the recording medium 9 is not uniform, and the process proceeds to step S110 to stop the recording operation.

As is apparent from the above description, in this embodiment, recording is not performed when the upper and lower ends of the recording medium are not supported upstream and downstream of the recording head.
Deterioration of recording quality due to uneven distance between the recording head and the recording medium does not occur, and good quality recording can be obtained. (Embodiment 2) Hereinafter, a second embodiment will be described with reference to a schematic diagram of a recording state shown in FIG. 3 and a flowchart shown in FIG. Since the configuration of the apparatus is the same as that of FIG. 1, the description will be made with reference to FIG.

In FIG. 3, reference numeral 23 denotes a recording element array arranged on the recording head 1, reference numeral 24 denotes a feed position by the feed roller 13, and reference numeral 25 denotes a discharge position by the discharge roller 16. In the figure, solid black characters represent characters after recording, and white blank characters represent characters to be recorded. Further, among the printing element arrays 23, the total element array length is indicated by L1, and the element array length used when an exemplary print pattern is printed is indicated by L2.

Hereinafter, the control contents of the second embodiment will be described.

When a recording start command is received from a host outside the recording apparatus in step S201, in step S202,
The paper sensor 12 determines whether the recording medium 9 is set in the recording device. At this time, if the paper sensor 12 is off, that is, if the recording medium 9 is not set, the process proceeds to step S203, and the recording operation is not performed.

If it is determined in step S202 that the paper sensor 12 is turned on, that is, the recording medium 9 is set, the process proceeds to step S204, and a cueing operation of the recording medium is performed. The cueing operation refers to feeding the leading end of the recording medium 9 to the position of the spur 15 and the discharge roller 16, that is, in FIG. 3, to the discharge position 25. In this state, the recording medium 9 Since the recording medium is held upstream and downstream, the distance between each recording element of the recording head 1 and the recording medium is kept uniform.

In step S205, the control unit (not shown) transfers the print data to the print element array 23 of the print head 1 with reference to the print element on the paper discharge position 25 side, and transfers the print data to the print medium array 9. The recording for one line is performed while discharging ink.

Next, the operation proceeds to step S206, where it is determined in the control unit (not shown) whether or not print data remains.
7, the recording is completed, and the recording medium 9 is discharged. The discharge operation is performed by the feed roller 13 and the discharge roller 16 by the rotation of the drive motor 18.

If print data remains in step S206, the process moves to step S208 to check the lower end position of the print medium. Confirmation is made as to whether the lower end of the recording medium 9 deviates from the paper feeding position 24 when the recording data is transferred from the paper discharging position 25 to the recording element array 23 of the recording head 1 as in step S205. To judge. If the lower end position of the recording medium 9 does not deviate from the paper feed position 24, the flow proceeds to step S209, and after performing the paper feeding operation, returns to step 205 and repeats the above-described operation.

If it is determined in step S208 that the lower end position of the recording medium 9 is out of the paper feed position 24, the flow advances to step S2.
Then, the paper feeding operation is performed until the lower end of the recording medium 9 does not deviate from the paper feeding position 24 (paper feeding amount: L4).

Next, in step S211, one line of recording is performed while transferring the recording data to the recording element L3 corresponding to the desired recording position. In step S214, the recording medium 9 is discharged and the recording is completed. .

As is apparent from the above description, in this embodiment, the recording element of the recording head is selected and recording is performed so that the lower end of the recording medium does not deviate from the feeding position. Can expand the recording range. Embodiment 3 Hereinafter, a third embodiment will be described.

FIG. 5 is a partial perspective view of a recording apparatus having a reading function according to the third embodiment. The configuration of this embodiment is similar to that of the first embodiment shown in FIG.

In this embodiment, the recording head 1 and the reading head 26 are mounted on the carrier 2 supported by the guide shaft 5.
Is provided. The read head 26 includes a plurality of read elements, a lamp, an optical lens, and the like, and the read document is scanned by the same drive member along the same path as the recording medium 9 for recording.

In FIG. 6, reference numeral 27 denotes a read head 26.
, 24 indicates a feeding position of the feeding roller 13, and 25 indicates a sheet discharging position of the sheet discharging roller 16. In the drawing, solid black characters represent characters after reading is completed, and white blank characters represent characters to be read. Further, among the reading element rows 27, the total element row length is indicated by L5, and in the present embodiment, the detection position of the read original 29 by the paper sensor 12 indicated by 28 is L6> L5.
It is configured so that

Hereinafter, the control contents of the third embodiment will be described with reference to the flowchart shown in FIG.

When a read / write start command is received from the host outside the printing apparatus in step S301, step S3
At 02, the paper sensor 12 determines whether or not the read original 29 is set on the recording device. At this time, if the paper sensor 12 is off, that is, if the document 29 to be read is not set, the process proceeds to step S303 and the reading operation is not performed.

If it is determined in step S302 that the paper sensor 12 is turned on, that is, it is determined that the original 29 to be read is set, the process proceeds to step S304, and the cueing operation of the original 29 is performed. The cueing operation means that the leading end of the read original 29 is fed to the position of the spur 15 and the discharge roller 16, that is, to the discharge position 25 in FIG. 6, and in this state, the read original 29 is
6 is held upstream and downstream of reading, so that the distance between each reading recording element of the reading head 26 or the lamp and the reading original is kept uniform.

Next, in step S305, the reading original 29 is read by the reading element array 27 of the reading head 29 while the carrier 2 is moved along the guide shaft 5 by the rotation of the driving motor 8, and all the reading elements are read. The read data is transferred to a control unit (not shown).

Next, in step S306, the read original 29 is moved by the rotation of the feed roller 13 to which the rotation of the drive motor 18 is transmitted, the same distance as the read element array 27 of the read head 26, that is, L5 shown in FIG. After performing the sheet feeding operation, the presence or absence of a read original is detected by the paper sensor 12 in step S307. Step S307
When it is determined that the read original 29 exists, the process returns to step S305 to repeat the above operations.

On the other hand, if it is determined in step S307 that there is no original to be read, the flow proceeds to step S308 to perform a reading operation. Step S307 is equivalent to step S30
5, the description is omitted.

Next, the flow shifts to step S309, and as shown in FIG. 6, a paper feeding operation for the maximum amount L7 within a range where the lower end of the read original 29 does not exceed the paper feeding position 24 is performed. After this,
In step S310, a reading operation is performed.
Only the data for the same distance as the preceding paper feed amount L7 is transferred to the control unit (not shown). Thereafter, the flow shifts to step S311, the read original 29 is discharged, and the reading operation ends.

As is clear from the above description, in this embodiment, the reading element of the reading head is selected and reading is performed so that the lower end of the reading document does not deviate from the feeding position, so that the reading document can be wide. High-quality reading operation can be performed over the region.

[0043]

As is apparent from the above description, during the recording and reading operations, the paper feed amount and the recording transfer data are set so that the lower ends of the recording medium and the read original do not deviate from the paper feeding position. By selecting the read transfer data, the recording and reading operations are performed over a wide area of the recording medium and the reading original while maintaining the distance between the recording head and the recording medium and the distance between the reading head and the reading original uniform, and high-quality image quality is obtained. Can be recorded and read.

[Brief description of the drawings]

FIG. 1 is a perspective view of a recording apparatus according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a first embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating a recording state according to a second embodiment of the present invention.

FIG. 4 is a flowchart showing a second embodiment of the present invention.

FIG. 5 is a partial perspective view of a recording apparatus according to a third embodiment of the present invention.

FIG. 6 is a schematic diagram illustrating a recording state according to a third embodiment of the present invention.

FIG. 7 is a flowchart showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording head 2 Carrier 3 Electric connection part 4 Chassis 5 Guide shaft 6 Guide rail 7 Belt 8 Drive motor 9 Recording medium 10 Upper guide 11 Lower guide 12 Paper sensor 13 Feeding roller 14 Pinch roller 15 Spur 16 Discharge roller 17 Gear 18 Drive motor 19 Gear 20 Gear train 21 Recovery member 22 Drive cam 23 Recording element train 24 Feeding position 25 Discharge position 26 Reading head 27 Reading element train 28 Detection position 29 Reading original

Claims (3)

[Claims] 1. A printing head comprising a plurality of printing elements and performing printing by ejecting ink to a printing medium, and a printing medium provided near an upstream side of the printing head and opposed to the printing head. A feeding member for feeding, and a discharging member provided near the downstream side of the recording head for discharging a recording medium at a position facing the recording head, wherein the recording head is perpendicular to the recording medium conveying direction. In a printing apparatus that performs printing while scanning in the direction in which the printing is performed, printing is performed only when a printing medium is supported by the feeding member and the printing medium is supported by the discharge member. method. A detecting member for detecting a lower end of the recording medium, and recording is performed by sequentially transferring recording data from the recording element on the discharge member side to a plurality of recording elements of the recording head. After the lower end of the recording medium is detected by the detecting member, the recording medium is fed by the feeding member to a position where the lower end of the recording medium does not deviate from the support of the feeding member, and recording is sequentially performed from the recording element on the feeding member side. 2. The ink jet recording control method according to claim 1, wherein the recording is performed by transferring data. 3. A reading head comprising a plurality of reading elements is provided on a support member for supporting the recording head, and a read document is conveyed by the feeding member and the discharging member. Usually, all the elements of the plurality of reading elements are provided. At the lower end of the read document, feeds the read document until the document does not come off the support of the feed member, and sequentially reads the read data from the reading element on the feed member side. 3. The ink jet recording control method according to claim 1, wherein the reading is performed by transferring.