JPH0872340A - Recording device - Google Patents

Abstract

(57) [Abstract] [Purpose] Prevents the transport system rollers from leaving the recording image on the recording material, especially the recording image, while keeping the quality of the recording image on the recording material by the roller marks. Providing a recording device that is prevented from being damaged. [Structure] Conveying means (17, 18, 19) having a plurality of roller pairs (17, 18), recording means, and a recording image on a recording material (15) are held by one of the roller pairs (18). A recording apparatus comprising: a control unit (CPU) that controls the operation of a member related to the transporting unit in order to cancel the holding state when the transporting unit is stopped while being held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and more particularly to a recording apparatus suitable for recording a plurality of recording images on the same recording material in sequence.

[0002]

2. Description of the Related Art FIG. 8 shows an example of a recording apparatus capable of this type of recording. This example shows a configuration example of a serial type color ink jet recording apparatus which carries out recording by mounting a plurality of ink jet recording heads on a carriage, where 10BK, 10Y, 10M and 10C are black (BK), respectively. A recording head that ejects yellow (Y), magenta (M), and cyan (C) color inks for recording. 11 is these recording heads 10BK
Carriage 10 to 10C are mounted in parallel, 12 is a main scanning rail for guiding the movement of the carriage 11, 13 is connected to the carriage 11, and timing for moving the carriage 11 along the main scanning rail at a predetermined timing. The belt 14 is a belt driving motor (hereinafter referred to as a main scanning motor).

Recording heads 10BK to 1 for main scanning
A recording material (hereinafter referred to as a recording sheet) 15 is located at a position 0C, which is not shown in the figure, facing the ink ejection surface and is shown in FIGS.
It is held on the platen 16 as shown in FIG. Reference numeral 17 is a registration roller pair related to the initial position of the recording sheet 15 in the sub-scanning direction, 18 is a discharge roller pair, 19 is a conveyance motor for driving the discharge roller pair 18, and the main scanning of the recording heads 10BK to 10C is performed once. Each time the recording corresponding to the width of each ink ejection port array in the sub-scanning direction (direction orthogonal to the main scanning direction) is performed, the conveyance motor (sub-scanning motor) 19 is involved in conveyance including the discharge roller pair 18. The rollers are driven and the recording sheet 15 is fed by the recording amount corresponding to the above width.

Next, an example in which a plurality of images are sequentially recorded on one recording sheet 15 by such a conventional ink jet recording apparatus will be described with reference to FIGS. 9A and 9B.

FIG. 9A shows an example of an image structure stored on a document to be copied or in a recording device of a computer. Here, as shown by A, B, and C, the images of the respective areas are dispersed on one recording sheet 15. In FIG. 9B, for the recorded images A, B and C in the areas as shown in FIG. 9A, the image A in the area where the recording is finished on the platen 16 is just the discharge roller pair 18 in the recording. The sheet has been fed to the position where it is held between. In this case, the image B of the other area
If C and C are continuously recorded, there is no problem. However, for example, when the image B is skipped for recording due to editing of the record, or when the images B and C are to be quoted from another manuscript. May be held in the standby state shown by (B) in the recording apparatus during the work.

[0006]

However, the recording sheet 15 as shown in FIG. 9B as in the above-mentioned conventional example.
If the waiting time becomes long while being held by rollers such as the discharge roller 18 that are involved in conveyance, a linear pressing mark remains on the portion of the recording sheet 15 that is left held by the rollers, and There was a risk of degrading quality. Further, depending on the model, the recorded image may be transferred to the roller side, or other inconvenient recording may occur.

An object of the present invention is to solve the above-mentioned conventional problems, prevent the recording image on the recording sheet, especially the recording image, from being left on the conveyance system roller, and prevent the recording sheet from being left. No roller pressing trace remains on the recorded image of
An object of the present invention is to provide a recording device that can contribute to improving the quality of recorded images.

[0008]

In order to achieve such an object, the present invention provides a conveying means having a plurality of roller pairs for conveying a recording material while holding and rotating the recording material, and the recording medium guided by the conveying means. One of the pair of rollers when recording means for recording on the recording material and the conveying means is stopped while the recording image on the recording material by the recording means is held by one of the pair of rollers. Control means for controlling the operation of the member related to the conveying means so as to release the holding state of the recorded image.

[0009]

According to the present invention, the recording material is conveyed by the conveying means every time a recording image is formed on the recording material. The recording image is one of a plurality of roller pairs of the conveying means. If the transportation means stops while being held by
Since a trace of pressure by the roller pair remains on the recorded image and the recorded image becomes unsightly, when the conveying means is stopped in the above state, the control means controls the operation of the member related to the conveying means to form on the recording material. The recorded image thus formed is released from the held state, and it is possible to prevent the recording quality from deteriorating due to the above operation.

It should be noted that the stop of the transport means as described above is 1
This occurs during standby, etc. when different recording images are recorded separately on one recording material. In such a case, the above operation may be performed in response to the stop, or other stop Since the condition may be considered, the above operation may be performed after a predetermined stop time.

[0011]

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

FIG. 1 shows a circuit configuration for control according to the present invention. Here, 1 is a central processing unit (CPU) for controlling the entire recording apparatus, and 2 is a program for control operation according to the present invention, which will be described later, together with various programs prepared for the recording apparatus. A storage device ROM is provided, and reference numeral 3 is a storage device RAM in which data and information related to a recorded image are temporarily stored. 4 is a CPU
An operation unit 1 for inputting a recording start signal and an instruction for executing various programs to the recording head unit 10 is a recording head unit composed of a single unit or a plurality of units mounted on the carriage 11 as shown in FIG. 10D is a recording head 10
A head drive unit for supplying a drive signal in accordance with a recording signal from the CPU 1, and 14D and 19D respectively supply a drive signal to the main scanning motor 14 and the sub-scanning motor 19 according to a signal sent from the CPU 1 according to a program. The main scanning motor drive unit and the sub-scanning motor drive unit.

Here, the sub-scanning motor 19 can rotate in a predetermined rotation amount bidirectionally like a pulse motor, and the CPU 1 can be operated according to a command from the operation unit 4 or a program stored in the ROM 2. The rotation operation as described above is performed via the above.

Next, the control operation according to the first embodiment of the present invention will be described with reference to FIGS.

In this example, in order to simplify the explanation,
The registration roller pair 17 is interlocked with the discharge roller 16 by a sheet feeding sub-scanning motor 19.
A drive belt 20 is stretched between the shaft of the sub-scanning motor 19 and the shaft of the registration roller for that purpose. However, although not shown, the present invention is also applicable to those in which the sheet feeding, the sheet transportation, and the sheet discharging are performed by the conveying roller pair and the discharging roller pair provided in addition to the registration roller pair 17. Needless to say.

2A is in the conveying direction S of the recording sheet 15, the image A is recorded in the first area, and the recorded image A is sandwiched between the discharge roller pair 18. It is in a state. Further, an area indicated by two parallel broken lines indicates a recording area on the platen 16 in which the recording head portion (not shown) can record in this state, and W indicates a recording width by one scanning. FIG. 2A shows the state in step S1 in the flowchart shown in FIG. 3, and in this example, in this state, the process proceeds to step S2 to either eject the recording sheet 15 thereafter, or continue, and then wait for data. It is determined whether or not to continue recording in the state of.

Thus, the sheet may be discharged in step S2, that is, if it is determined that the recording is completed, the process proceeds to step S7, the sub-scanning motor 19 is driven, and the recording sheet 15 is discharged. On the other hand, in the case of negative determination in step S2, for example, when a wait command for inputting the next image B is input to the CPU 1 via the operation unit 4, the process proceeds to step S3 and is recorded first. Driving the distance L1 sub-scanning motor 19 by which the area of the image A present is completely displaced from the holding area by the discharge roller pair 18 to the discharge side,
The recording sheet 15 is advanced as shown in FIG. It should be noted that such a forwarding operation is performed in step S if the above-described command is input in advance via the operation unit 4.
It may be performed subsequent to 1.

Next, in step S4, the next image B
Of the sub-scanning motor 19 so as to return the recording sheet 15 by the distance L1 for the advance feed, as shown in FIG. 2C. Is driven, and the next image B is recorded in step S6. Then, after this, the process returns to step S2, and the operations of steps S3 to S6 are repeated. In the case of such repetition, the distance L1 may be changed each time, or it may be preset before the recording so that the expected recording area is entirely out of the holding position by the discharge roller pair. May be.

Next, the control operation according to the second embodiment of the present invention will be described according to the procedure with reference to FIGS.

In the present embodiment, as described above, after the image A based on the first one command is recorded on the recording sheet, the waiting until the image B based on the next command is recorded on the recording sheet. During this period, the leading edge of the recording sheet is always once returned to a predetermined sheet feeding position upstream of the recording area.

FIG. 4A is a view corresponding to FIG. 2A, in which the above-mentioned image A is recorded on the recording sheet 15.
The state in which the sheet has been fed and is waiting for a command for recording by the next main scan is shown. That is, the flowchart shown in FIG. 5 shows a process of recording the image A in step S1 and then determining in step S2 whether or not there is a new recording instruction on the recording sheet 15. If it is determined in step S2 that there is no recording according to the subsequent command, the process proceeds to step S7, the sub-scanning motor 19 is driven, and the recording sheet 15 is ejected as it is in the recording apparatus shown in FIG. To do.

If it is determined in step S2 that there is a subsequent recording command, the step is performed in order to prevent the discharge roller 18 from being left on the image A by leaving it in the state of (A). In S3, the sub-scanning motor 19 is reversely rotated,
The recording sheet 15 is retracted from the position (A) by a distance L2 as shown in FIG. 4B. It should be noted that the front end portion 15A of the recording sheet 15 at the time of this retreat is further upstream from the platen 16, and the image A shows the registration roller 17
The image A is not pressed by the registration roller pair 17 on the further upstream side. As shown in FIG. 4B, the leading end portion 15 of the recording sheet 15 is set as a position where the image A is dislocated from the platen 16 and the first image A does not interfere with the registration roller pair 17.
A suitable example is a position immediately after A is pinched by the pair of registration rollers 17.

Incidentally, the recording sheet 15 is (B)
4B, for example, the position of the recording sheet front end portion 15A shown in FIG. 4B is detected by a photo sensor or a microswitch type sensor,
The reverse rotation drive of the sub-scanning motor 19 may be stopped at the detection stage.

Thus, after step S3, step S
4, the start of image recording by the next command is waited, and if the determination is affirmative, the process proceeds to step S5, and the sub-scanning motor 19 is used to return the recording sheet 15 to the original position shown in FIG. It is rotated in the forward direction and the next image is recorded in step S6. After that, the process returns to step S2, and the recording sheet 15 is discharged at the time of step S7 when the operations of the following steps are repeated and the recording of all the images is completed.

Next, a third embodiment of the present invention will be described with reference to FIGS.

In the above-described examples, the sub-scanning motor 19 is driven to prevent the recorded image on the recording sheet 15 from being left in a state of being held by the roller pair of the conveying system. In contrast to these embodiments, the third embodiment is arranged so that one of the conveying system rollers arranged downstream of the recording area, for example, one of a pair of discharge rollers, is moved away from the surface of the recording sheet 15 during the above-mentioned standby. However, the discharge roller pair is returned to the original posture again when it is determined that recording will be performed according to the next command.

First, the construction of the carrying system applied to the third embodiment will be described with reference to FIG.

FIG. 6A shows a normal transport state,
FIG. 6B shows a state in which, for example, the driven roller 18A of the discharge roller pair 18 is separated from the surface of the recording sheet 15 by the distance L3, and the holding of the sheet 15 is released. That is, 21 is a lever for swingably holding the shaft 18AB of the driven roller 18A, 22 is a support shaft for supporting the end portion of the lever 21, and 23 is for urging the lever 21 in the separating direction shown in FIG. The spring 24 is an elliptical cam member that is in sliding contact with the side surface of the lever 21.

Therefore, in the functional state of the discharge roller pair 18 as shown in FIG. 6A, the long diameter portion of the discharge roller pair 18 is brought into contact with the side surface of the lever 21 by the operation of the cam member 24 by an actuator (not shown), and the lever 21 is moved. Driven roller 18A
Are kept in pressure contact with the main discharge roller 18B. Further, in the retracted state of the driven roller 18A, the short diameter portion of the driven roller 18A is brought into contact with the side surface of the lever 21 by the operation of the cam member 24.
The discharge roller pair 18 does not function, and therefore the recording sheet 15 is not left behind by the discharge roller pair 18.

The procedure of the control operation according to the third embodiment will be described with reference to FIG.

In step S1, the first image A is recorded on the recording sheet 15 in the same manner as described in the above embodiments, and then the process proceeds to step S, where it is determined whether or not there is an instruction to record the next image. To judge. However, if there is no instruction, it is determined that the recording has been completed, the process proceeds to step S7, the sub-scanning motor is driven as it is, and the recording sheet 15 is discharged by the discharge roller pair 18 which is maintained in the state shown in FIG. Further, in step S2, in the case of affirmative determination, the process proceeds to step S3, in which the cam member 24 is driven by the actuator (not shown) as described above, and the driven roller 18A is shown in FIG. 6B. Recording sheet 15
Try to separate it from the top by a distance L3.

Then, in the next step S4, the process waits until the start of the next image recording, and if a start command is obtained, the process proceeds to step S5 to drive the cam member 24, and drive the driven roller 18A as shown in FIG. Return to the state shown in A). Thereafter, the next image is recorded in step S6, the process returns to step S2 again, and the operations of the following steps are repeated. When the recording by all the commands is completed, the recording sheet 15 is discharged in step S7.

In each of the embodiments described above, the image recording A according to the first instruction, the image recording B according to the next instruction, and the image according to the subsequent instruction are sequentially recorded in independent areas on the recording sheet 15. However, it is needless to say that the present invention can be applied even in the case where some or all of these image recordings overlap. That is, in such a case, the recording sheet is returned in either the sheet feeding direction or the returning direction to a position where the first recorded image area is not held by the conveying roller system, or the recorded image is held by the roller. It suffices to execute either of the operations of releasing the holding state of the pair.

Furthermore, in each of the embodiments described above, as an easy-to-understand example, the case where the corresponding image recordings are sequentially formed on one recording sheet by different commands is described. The application is not limited to the recording of a plurality of images formed by such different commands, but is also applicable to the case where the recording operation is interrupted for a predetermined time in the middle of an image recorded by one command, for example. It is possible. In such a case, the timer may be controlled so that the operation as described in each of the above-described embodiments is performed when the waiting time elapses, and the control operation as described in the above-described embodiments is performed. You may make it use together with operation.

[0035]

As described above, according to the present invention, a conveying means having a plurality of roller pairs for conveying the recording material while holding and rotating the recording material, and the recording material guided by the conveying means. Recording means for recording on the recording medium, and when the conveying means is stopped while the recording image on the recording medium by the recording means is held by one of the roller pairs, the recording by one of the roller pairs is performed. Since the control means controls the operation of the member related to the conveying means so as to release the held state of the image, the recorded image on the recording sheet is recorded for a long time, for example, between the pair of conveying rollers on the downstream side of the recording area. Since the trace of the presser remains due to being held in the position, it is possible to prevent inconvenience such as deterioration of image quality and recording quality.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control circuit configuration according to the present invention.

FIG. 2 is an explanatory diagram showing a control operation of the transport system according to the first embodiment of the present invention in three steps (A), (B) and (C).

FIG. 3 is a flowchart showing a procedure of a transport system control operation according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a control operation of a transport system according to a second embodiment of the present invention in two steps (A) and (B).

FIG. 5 is a flowchart showing a procedure of a transport system control operation according to the second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a control operation of a transport system according to a third embodiment of the present invention in two states (A) and (B).

FIG. 7 is a flowchart showing a procedure of a transport system control operation according to the third embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a transport system according to a conventional example by a plan view (A) and a sectional view (B).

9A and 9B are explanatory diagrams respectively showing an image recording according to a conventional example in a recording diagram on a recording sheet (A) and a state diagram during the recording operation (B).

[Explanation of symbols]

 1 CPU 2 ROM 3 RAM 4 Operation part 10 Recording head part 10BK, 10Y, 10M, 10C Recording head 10D Head drive part 15 Recording sheet (recording material) 15A Tip part 16 Platen 17 Registration roller pair 18 Ejection roller pair 18A Followed roller 19 Sub-scanning motor 21 Lever 23 Spring 24 Cam member

Claims (7)

[Claims] 1. A conveying means having a plurality of roller pairs for conveying a recording material while holding and rotating the recording material, a recording means for recording on the recording material guided by the conveying means, and the recording means. When the conveying means is stopped while the recording image on the recording material is being held by one of the roller pairs, the conveying means is provided to release the held state of the recording image by one of the roller pairs. A recording apparatus, comprising: a control unit that controls the operation of the related member. 2. The recording according to claim 1, wherein one of the pair of rollers is a roller pair which is provided on the downstream side of the recording unit of the conveying unit and is involved in discharging the recording material. apparatus. 3. The recording image in the preceding stage when a plurality of recording images are recorded on the recording material is that the conveying means is stopped while the recording image is being held by one of the pair of rollers. 3. The recording apparatus according to claim 1, wherein the recording apparatus is in a standby state for recording a recording image in the subsequent stage. 4. The operation of a member related to the conveying unit controlled by the control unit is to drive the plurality of roller pairs to a position where the held state of the recorded image is released to move the recording material. The recording apparatus according to any one of claims 1 to 3, wherein the recording apparatus is an operation for causing the recording apparatus. 5. The operation of a member related to the conveying unit controlled by the control unit is one pinch release operation of the roller pair for holding the recording image in the pinch state. The recording device according to any one of 1. 6. The control means controls the operation of a member related to the conveying means so as to release the holding state of the recorded image by one of the pair of rollers after a lapse of a predetermined time from the stop of the conveying means. Claim 1 to 3 characterized by the above-mentioned.
The recording device according to any one of 1. 7. The recording means is an ink jet recording head for performing recording by ejecting ink onto the recording material while moving in a direction intersecting with a conveying direction of the recording material by the conveying means. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus.