JP2000071549A - Image-recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply remove a recording medium without generating an ink stain by forming a recording head movably to a medium-holding means to be close to and away from a record position, stopping the rotation of the medium-holding means when an abnormality in transfer of the medium is detected and retreating the recording head to a protect position. SOLUTION: The image-recording apparatus has a recording head 22 formed movably to a medium-holding means 20. The recording head 22 can approach a record position where the recording head 22 can operate to record and can retreat to a protect position away from the medium-holding means 20. When an abnormality in transfer of a recording medium is detected, the medium- holding means 20 can stop and the recording head 22 can retreat to the protect position after the rotation stop of the means. An inconvenient situation caused by an immediate output when the transfer abnormality is detected, that is, caused when an operator acknowledging the transfer abnormality output forces an emergency stop although printing is not completed or the recording head 22 is still close to the medium-holding means 20 can be eliminated clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium conveyed from an upstream side held by a rotatable medium holding means, and an image formed on the storage medium held by the medium holding means and being rotated by using a recording head. The present invention relates to an image recording apparatus which records a recording medium and conveys the recording medium peeled off from the medium holding means to the downstream side after the recording is completed.

[0002]

2. Description of the Related Art A recording medium (paper) conveyed from an upstream side
Is held in a rotatable medium holding means (a rotating drum or the like), an image is recorded on the storage medium held by the medium holding means and rotating by using a recording head, and the recording medium is peeled off from the medium holding means after the recording is completed. The image recording apparatus A formed so as to convey the recording medium to the downstream side thereof is proposed (for example, the second
692005).

In addition, for example, many (for example, 1000)
Are arranged in the main scanning direction (paper width direction), and all the
An image recording apparatus (inkjet printer) B capable of simultaneously recording rows and consequently performing high-quality color recording of 600 sheets or more at 20 PPM has been proposed (for example, Japanese Patent Application Laid-Open No. 10-138520).

Generally, in an image recording apparatus, when a medium conveyance abnormality (jam) occurs in a conveyance path of a recording medium, the medium conveyance is stopped and the recording is stopped. In this regard, as an appropriate processing of the recording medium being conveyed, an image recording apparatus C has been proposed which is designed to continue the conveyance on the downstream side in the conveyance direction from the location where the jam (paper jam) has occurred (for example, Japanese Patent Laid-Open No. No. 79,939)
Have been.

Further, in the apparatus A for recording an image on a rotating storage medium held by the medium holding means using a recording head (nozzle head), when a conveyance abnormality occurs, the upstream side of the medium holding means is used. Is stopped immediately, but the peeling operation of the recording medium held by the medium holding means can be continued.

[0006]

By the way, the device A
As in the case of the above-described apparatus C, it is basically assumed that if a conveyance error occurs, the conveyance is stopped immediately and the recording of the recording medium held by the medium holding means is stopped. Only peeling can be exceptionally continued. However, no consideration is given to a transport abnormality that may occur between the recording head and the medium holding unit. If a jam occurs between the recording head and the medium holding means, the jam may progress further and become irreversible.

In other words, in the case of an ink jet type image recording apparatus such as the apparatus B, the clearance between the recording head and the medium holding means is, for example, 1 mm or less. When a conveyance error (jam) occurs, it is very difficult to remove the jam (removal of the medium) compared to the case of a conveyance error in the upstream (downstream) conveyance path. Is likely to be caused. Furthermore, if the ink adheres to the peripheral surface of the rotating body (medium holding means), the subsequent recording medium becomes dirty, and high-quality recording becomes difficult.

On the other hand, there is also a problem that if a conveyance error occurs on the upstream side or the downstream side and the recording is stopped halfway, the recording medium recorded up to that point is wasted.

A first object of the present invention is to prevent the jam from advancing due to a conveyance abnormality between a recording head and a medium holding means, and to easily remove the recording medium without causing ink contamination around the recording medium. It is an object of the present invention to provide an image recording apparatus capable of performing the above. It is a second object of the present invention to provide an image recording apparatus capable of continuing a recording operation in the middle of recording and capable of peeling off a recorded medium and delivering it to a downstream side or easily removing the medium from the spot.

[0010]

According to a first aspect of the present invention, a recording medium conveyed from an upstream side is held by a rotatable medium holding means, and the recording medium is held by the medium holding means and recorded on a rotating storage medium. In an image recording apparatus which records an image using a head and conveys a recording medium peeled off from a medium holding unit after the recording is completed to a downstream side thereof, a recording position where the recording head can perform a recording operation with respect to the medium holding unit. The recording medium is formed so as to be accessible to the user and to be retractable at a protection position away from the medium holding means, and when the conveyance abnormality of the recording medium is detected, the rotation of the medium holding means is stopped and the recording is stopped after the rotation is stopped. This is an image recording apparatus formed so that the head can be retracted to the protection position.

In this invention, when the conveyance abnormality of the recording medium is detected, the rotation of the medium holding means is stopped to prevent the occurrence of the jam between the medium holding means and the recording head, or to prevent the occurrence of the jam. To stop the progress. After the rotation is stopped, the recording head is retracted to a protection position apart from the medium holding means, so that the medium can be easily removed from between the medium holding means and the recording head, and the ink adhered to the recording medium is transferred to another. Don't do it.

That is, it is possible to prevent the jam from advancing due to a conveyance abnormality between the recording head and the medium holding means, and to easily remove the recording medium without causing ink contamination around the recording head. Etc. can be assured of protection.

According to a second aspect of the present invention, the recording medium conveyed from the upstream side is held by rotatable medium holding means,
An image recording apparatus that records an image on a rotating storage medium held by the medium holding unit using a recording head, and conveys the recording medium separated from the medium holding unit to a downstream side after the recording is completed. A head is formed so as to be able to approach a recording position at which recording can be performed with respect to the medium holding means and to be retractable at a protection position apart from the medium holding means,
An image recording apparatus is formed such that when a conveyance error of the recording medium is detected, the recording head is retracted to a protection position and rotation of the medium holding unit can be stopped after the retreat. .

According to this invention, when the conveyance abnormality of the recording medium is detected, the recording head is retracted to a protection position away from the medium holding means after, for example, terminating the recording during the recording, and the recording head and the recording medium are moved together. The medium is easily removed from the space between the head and the ink, and the ink adhered to the medium is prevented from being transferred to and adhered to the other medium. Thereafter, for example, the medium held by the medium holding unit is peeled off, and thereafter, the rotation of the medium holding unit is stopped.

That is, the recording operation during the recording can be continued, and the recorded medium can be peeled off and delivered downstream, or the recorded image can be easily taken out without breaking the recorded image.

According to a third aspect of the present invention, when the conveyance abnormality is detected, the fact that the recording medium is conveyed abnormally can be output to the outside after the rotation of the medium holding means is stopped or after the recording head is retracted. The image recording apparatus is formed.

According to the present invention, when the conveyance abnormality is detected and after the rotation of the medium holding means is stopped or the recording head is retracted, the fact that the recording medium is conveyed abnormally can be output to the outside by, for example, a display or an alarm. . Therefore, in addition to providing the same effects as those of the first and second aspects of the present invention, furthermore, the operator is notified immediately of the abnormal transport output and notified of the abnormal transport output by the operator who has not completed printing. It is possible to eliminate the inconvenience of the conventional apparatus caused by forcibly stopping the recording head in a state where the recording head is kept close to the medium holding means.

Further, the invention according to claim 4 is an image recording apparatus which is formed so as to be able to immediately stop conveyance of a medium upstream of the medium holding means when the conveyance abnormality is detected.

According to this invention, when the conveyance abnormality is detected, the conveyance of the medium upstream of the medium holding means is immediately stopped. Therefore, since a new medium is not supplied, the operation and effect of each of the first to third aspects of the present invention can be ensured more reliably.

[0020]

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

(First Embodiment) This image forming apparatus comprises an ink jet printer 10 shown in FIG. 1 and can perform a recording operation on a medium holding means 20 with a recording head 22 as shown in FIGS. The recording medium is formed so as to be able to approach a recording position and to be retractable at a protection position distant from the medium holding means 20. The head (22) is formed to be retractable to the protection position.

In FIG. 1, an ink jet printer 1
0 is the ink tank 2 as in the case of the device B described above.
9 to a recording head 22 having a plurality of inkjet nozzles, and is formed so as to be capable of recording on a medium (paper or the like) while discharging ink from the selected inkjet nozzle. In this embodiment, four colors (cyan,
(Yellow, magenta, and black), and can record color on A4 paper at a high speed of 20 PPM, for example.

More specifically, the paper (recording medium) supplied from the paper transport means 30 including the paper supply means is transported by an upstream transport means 31U to a medium holding means (rotary body) 20 which rotates in one direction R, and It is held on its peripheral surface using the holding claw, and is rotated synchronously with the rotating body (20). The medium can also be supplied from the manual feed tray 13. Reference numeral 21 denotes a charging roller for charging the held medium.

The recording head 22 is moved away from the recording position approaching the rotating body (20) indicated by a solid line in FIG. 1 in the normal direction of the rotating body (20) as indicated by a two-dot chain line. Can be moved up and down to the maintenance position (protection position). 26 is the recording head 22 at the maintenance position
Maintenance means for moving between the recording medium 22 and the medium holding means 20 to maintain the recording head 22.

The recorded medium is peeled off from the rotating body (20) by a peeling means (not shown), and is discharged to and collected from the upper cover 12 in the X direction by the downstream transport means 31D. For example, 500 recorded media can be collected on the upper cover 12.

The upper cover 12 is maintained at the upper part (opening OPN) of the main body case 11 while maintaining the horizontal posture of the upper cover 12 by an opening / closing mechanism 60 including a pair of link bars 61F, 61B and opening / closing springs 65F, 65B. ) Can be opened and closed.

When the upper cover 12 is opened, an ink bottle 29B that can be attached to and detached from the ink tank 29 through the open space OPN is replaceable from the outside. By opening the manual feed tray 13, the rotating body (2
0) etc. can be taken out.

The ink tank 29 is constantly supplied with ink from a detachable ink bottle 29B. The ink level in the ink tank 29 is controlled to be constant.
In the recording state, the ink supply pump 2 having a valve function
By releasing the nozzle 8 and using the negative pressure generated by the recording head 22, ink can be supplied to the recording head 22 through the tube 27. The ink supply pump 28 is driven at the time of maintenance or the like.

In FIG. 2, the ink jet printer 10 is formed by the image processing unit 40 and the engine unit 50, and is created in the own device (40) based on a recording command generated in the own device (40). The recorded data is recorded. In addition, a data communication line (network ... for example,
It is also possible to construct an ink jet recording system that performs recording processing of recording data transmitted from the external computer 1 via the LAN (LAN) according to the recording instruction.

The image processing unit 40 includes a CPU 41, a ROM 4
2, RAM 43, operation panel (PNL) 44, display unit (IND) 45, interface (I / F) 46, sensors 32, 3 for detecting upstream and downstream transport abnormalities
3 includes an input / output port (I / O) and a timer (TMR) 47 to which the printer 3 is connected. Drive control by an appropriate amount.

In FIG. 2, a driver (H.DRVR) for the recording head 22, a driver (DRVR) for the rotating mechanism 19 for rotating and driving the rotating body (20), and a driver for the paper transport means 30 (31U, 31D). Driver (DRV
R) is expressed as being disposed in the image processing unit 40 for convenience.

The engine unit 50 has a rotating body (20) capable of carrying a recording medium (paper) on its peripheral surface and rotating at a set rotation speed (for example, 120 RPM) by the rotating mechanism 19.
A recording head 22 that cannot be relatively moved in the direction of rotation (R) of the rotating body (20); an ink supply unit having an ink tank 29 and the like; a sheet conveying unit 30; and the like. For example, color and monochrome recording can be performed while ink is constantly supplied to the chambers and ink is ejected from the inkjet nozzles for each color connected to each ink chamber to a recording medium.

Here, the conveyance abnormality detecting means (CPU
41, the ROM 42) monitors the signals of the sensors 32 and 35 and detects that a transport abnormality has occurred (YE in ST10 of FIG. 3).
S), the transport stop control means (CPU 41, ROM 4
2) stops the conveyance on the upstream side of the medium holding means 20 (ST13).

That is, it is possible to prevent a new recording medium from being supplied between the medium holding means 20 and the recording head 22. Therefore, it is possible to reliably prevent the occurrence of a jam between the two 20 and 22 described later in detail.

It should be noted that a transport error occurs on the downstream side (ST11).
If YES), the downstream side also stops (ST1).
2).

Thereafter, the rotation stop control means (CPU 4
1, the ROM 42) sends a signal to the driver to stop the rotation of the rotating body (20) (ST14). Therefore,
It is possible to prevent the occurrence of a jam between the recording head 22 and the medium holding unit 20 at the recording position that is close to each other, or to prevent the further progress of the generated jam.

After this rotation is stopped, the retraction control means (CP
U41, ROM 42) retreats the recording head 22 to a protection position away from the medium holding means 20 indicated by a two-dot chain line in FIG. 1 (ST18 in FIG. 4). Therefore, the recording medium sandwiched between the medium holding means 20 and the recording head 22 can be easily removed. The ink adhered to the recording medium does not transfer and adhere to the peripheral surface of the rotating body (20). There is no need to worry about applying an excessive force or bending moment to the recording head 22, so that protection can be ensured.

Transport error output control means (CPU 41, RO
M42) is to stop the rotation of the medium holding means 20 (ST in FIG. 3).
14) Retract the recording head 22 later (ST1 in FIG. 4)
8) Later, the fact that the conveyance error of the recording medium has occurred is output to the outside. In this embodiment, a display alarm output to the display 45 and a sounding alarm output by an electronic buzzer (not shown) are used.

Therefore, a situation that occurs when the output is immediately performed upon detection of the occurrence of a transport error (YES in ST10 in FIG. 3), that is, when the operator who knows the output of the transport error indicates that the printing has not been completed or the recording head 22 holds the medium. Means 20
A situation in which there is a lot of inconvenience that the emergency stop is forcibly performed in spite of the state (recording position) in which the camera is kept close to the camera can be eliminated.

Incidentally, the conveyance error output control means (41, 4)
2) In this embodiment, after the rotation of the medium holding unit 20 is stopped (ST14 in FIG. 3), before the retreat of the recording head 22 (ST18 in FIG. 4) or simultaneously therewith, a notification of the conveyance abnormality is output. It may be formed as possible. This is because, even if the output is urgently stopped, the jam can be prevented from progressing in at least the narrow gap between the medium holding unit 20 and the recording head 22.

If the transport error occurs where it has been resolved (YES in ST20 of FIG. 6), the medium holding means 20 can be re-rotated (ST21), and the downstream transport means (31D) ) Is driven (ST22). Further, since the recording head 22 is separated (ST15 in FIG. 3).
NO), approach it to the medium holding means 20 (ST16)
After that, the upstream-side transport unit 31U is driven (ST
17).

(Second Embodiment) In the second embodiment, the basic configuration and functions are the same as those of the first embodiment (FIG. 1).
This is the same as FIG. 4), but even when a conveyance error of the recording medium is detected, recording on the recording medium is possible (ST34 and ST35 in FIG. 5), and after the recording is completed (S34).
At T35 (YES), first, the recording head 22 is retracted to the protection position away from the medium holding means 20 (ST36), so that the medium can be easily removed from between the medium holding means 20 and the recording head 22 and adhered to the medium. Prevent the transfer of ink to other parts.

Next, for example, the medium held by the medium holding means 20 is peeled off, and thereafter, the rotation of the medium holding means 20 is stopped (ST40 in FIG. 6).

That is, the recording operation during the recording can be continued, and the recorded medium can be peeled off and delivered to the downstream side, or the recorded image can be easily taken out from the spot without breaking.

In the second embodiment, the fact that the conveyance abnormality is output by the conveyance abnormality output means (41, 42)
Alternatively, the output may be performed after the retracting operation (ST36 in FIG. 5) and before the rotation stop of the medium holding unit 20 (ST40 in FIG. 6) or simultaneously therewith. This is because at least recording of the medium being recorded can be completed.

Further, ST30 to ST33, ST3 in FIG.
7 to ST39 correspond to ST10 of the first embodiment (FIG. 3).
ST13 is the same as ST15 to ST17.
ST41 to ST44 in FIG. 6 correspond to ST19 to ST22 in FIG.
Is the same as

It should be noted that the first embodiment and the second embodiment are combined, and one of them is selectively switched based on, for example, the importance of a print job, the type of paper used, and the like. be able to.

[0048]

According to the first aspect of the present invention, when the conveyance abnormality of the recording medium is detected, the rotation of the medium holding means can be stopped and the recording head can be retracted to the protection position after the rotation is stopped. Image recording apparatus, it is possible to prevent the jam from advancing due to a conveyance error between the recording head and the medium holding unit, and to easily remove the recording medium without causing ink contamination around the recording medium. At the same time, it is possible to ensure the protection of the recording head and the like.

According to the second aspect of the present invention, when a conveyance error of the recording medium is detected, the recording head can be retracted to the protection position and the rotation of the medium holding means can be stopped after the retraction. Since the image recording apparatus is an image recording apparatus, the recording operation during recording can be continued, and the recorded medium can be peeled off and delivered to the downstream side, or the recorded image can be easily taken out without breaking it.

According to the third aspect of the present invention, when a conveyance error is detected, it is possible to output to the outside that the recording medium is conveyed abnormally after the rotation of the medium holding means is stopped or after the recording head is retracted. Claim 1 and Claim 2
In addition to the effects similar to those of the inventions described above, in addition to the above, the effect is immediately output in the event of a transport error, and the operator who knows the output of the transport error has not completed printing or the recording head approaches the medium holding means. It is possible to eliminate the inconvenience of the conventional device caused by forcibly stopping the apparatus in the state in which it is kept as it is.

Further, according to the fourth aspect of the present invention, when a transport abnormality is detected, the transport of the medium upstream of the medium holding means can be stopped immediately, so that the transport can be stopped immediately. The effects of each invention up to 3 can be secured more reliably.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is also a block diagram.

FIG. 3 is a flowchart (1) for explaining the operation.

FIG. 4 is also a flowchart (2) for explaining the operation.

FIG. 5 is a flowchart (1) for explaining an operation according to the second embodiment of the present invention.

FIG. 6 is also a flowchart (2) for explaining the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ink jet printer (image recording apparatus) 20 Medium holding means 22 Recording head 25 Elevating means 30 Medium conveying means 31U Upstream conveying means 31D Downstream conveying means 40 Drive control unit 50 Engine

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[Procedure amendment]

[Submission date] October 7, 1998 (1998.10.
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION The present invention is to hold the recording medium conveyed from the upstream side to a rotatable media retaining means, by using a recording head to record media in the held and rotated in this medium holding means The present invention relates to an image recording apparatus that records an image and conveys a recording medium peeled from a medium holding unit after the recording is completed to a downstream side thereof.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art A recording medium (paper) conveyed from an upstream side
Is held on a rotatable medium holding means (rotary drum, etc.), recording an image using a recording head to record media in the held and rotated in this medium holding means, it is peeled from the medium holding means after end of recording The image recording apparatus A formed so as to convey the recording medium to the downstream side thereof is proposed (for example, the second
692005).

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

Further, in the apparatus A for recording an image using a recording head (nozzle head) to record media in the held and rotated on the medium holding means, when the conveyance failure occurs, upstream of the medium holding means The conveyance of the recording medium is stopped immediately, but the peeling operation of the recording medium held by the medium holding means can be continued.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

According to a first aspect of the present invention, a recording medium conveyed from the upstream side is held by a rotatable medium holding means, and the recording medium held by the medium holding means and rotating is held.
In an image recording apparatus which records an image on a recording medium using a recording head and conveys the recording medium peeled off from the medium holding means to the downstream side after the recording is completed, the recording operation of the recording head with respect to the medium holding means is performed. A recording position that can be approached to a possible recording position and can be retracted to a protection position distant from the medium holding unit, and when the conveyance abnormality of the recording medium is detected, the rotation of the medium holding unit is stopped and the rotation is stopped. Hereinafter, an image recording apparatus formed so that the recording head can be retracted to the protection position.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, the recording medium conveyed from the upstream side is held by rotatable medium holding means,
An image recording apparatus for conveying recording an image using a recording head to record medium is held and rotating in the medium holding means, the recording medium peeled from the medium holding means after end of recording on the downstream side, the A recording head is formed so as to be able to approach a recording position at which recording can be performed with respect to the medium holding means and to be retractable at a protection position apart from the medium holding means,
An image recording apparatus is formed such that when a conveyance error of the recording medium is detected, the recording head is retracted to a protection position and rotation of the medium holding unit can be stopped after the retreat. .

Continued on front page F-term (reference) 2C058 AB04 AB16 AC07 AC17 AE02 GB22 GB30 GB54 2C059 AA00 AA51 AA63 2C061 AQ05 BB10 BB19 BB21 HH01 HJ01 HJ02 HJ07 HV09 HV19 HV32 HV44 2C064 CC02 CC05 CC11 DD06

Claims (4)

[Claims] A recording medium conveyed from an upstream side is held by a rotatable medium holding means, an image is recorded on a rotating storage medium held by the medium holding means using a recording head, and recording is completed. An image recording apparatus which conveys the recording medium peeled off from the medium holding unit to a downstream side thereof, wherein the recording head can approach a recording position at which recording can be performed on the medium holding unit and is separated from the medium holding unit. The recording head is formed so as to be retractable at the protection position, and when the conveyance abnormality of the recording medium is detected, the rotation of the medium holding means is stopped, and the recording head can be retracted to the protection position after the rotation is stopped. The image recording device formed in the. 2. A recording medium conveyed from the upstream side is held by a rotatable medium holding means, an image is recorded on a rotating storage medium held by the medium holding means using a recording head, and recording is completed. An image recording apparatus which conveys the recording medium peeled off from the medium holding unit to a downstream side thereof, wherein the recording head can approach a recording position at which recording can be performed on the medium holding unit and is separated from the medium holding unit. The recording head is formed so as to be retractable at a protection position, and when a conveyance error of the recording medium is detected, the recording head is retracted to the protection position and the rotation of the medium holding means can be stopped after the retreat. The image recording device being formed. 3. The apparatus according to claim 1, wherein when the conveyance abnormality is detected, the recording medium conveyance abnormality is output to the outside after the rotation of the medium holding unit is stopped or after the recording head is retracted. Alternatively, the image recording apparatus according to claim 2. 4. The apparatus according to claim 1, wherein when the conveyance abnormality is detected, the conveyance of the medium upstream of the medium holding means can be stopped immediately. The described image recording device.