CN1255429A

CN1255429A - Image recording device

Info

Publication number: CN1255429A
Application number: CN99108646A
Authority: CN
Inventors: 藤本博; 山中康誉; 丸尾进; 岸本浩司
Original assignee: Fujitsu Ltd
Current assignee: Fujifilm Business Innovation Corp
Priority date: 1998-11-27
Filing date: 1999-06-18
Publication date: 2000-06-07
Anticipated expiration: 2019-06-18
Also published as: JP2000159404A; KR100545949B1; KR20000034874A; JP3360166B2; CN1132739C

Abstract

To provide an image recording device capable of preventing damage to a recording paper without increasing a space between a recording head and a platen roller, and preventing a deterioration in printing quality owing to stabilization delay of the platen roller caused by a inertial force. This device comprises a paper carrying drive source 7 for driving a carrying means, a platen drive source 15 for driving a platen roller to rotate, and a platen motor controlling MPU 32 which actuates the platen drive source 15 during actuating of the paper carrying drive source 15 when the required amount of carrying of recording paper is not less than a prescribed amount or when the thickness of the recording paper is not less than a prescribed thickness, and makes the platen drive source 15 be at a standstill during actuating of the paper carrying drive source 15 when the required amount of carrying of recording paper is less than a prescribed amount or when the thickness of the recording paper is less than a prescribed thickness.

Description

Image recording structure

The present invention relates to, for example dot matrix impact printer is such, have to drive independently of one another and be used for along with carrying out record by record head, carry the carrying of conveying mechanism of paper used for recording to use drive source and rotation to drive the image recording structure of the air roll of air roll off and on drive source with paper along the each amount on demand of prescribed direction.

In general, in the image recording structure that adopts air roll, because and the recording surface of the contacted paper used for recording of air roll and the gap between the record head are very little, so as rough and uneven in surface medium or order the paper machine partly exists the paper used for recording of the thick part of paper with paper etc. occasion, paper used for recording is cut to pieces broken between record head and air roll sometimes.

Therefore, adopt such formation, promptly the motor of carrying paper used for recording with make the air roll motor rotating shared, a motor makes the air roll rotation via belt thus, utilizes skidding between belt and the air roll whereby, prevents the breakage of paper used for recording.

; in the occasion that adopts this formation; because moving as the operation of recording of general printing action and paper feeding when alternately repeating; for the image recording structure of picture point battle array impact printer that works high-speed record, the time compole that can leave paper feeding for is short, so even motor stops; air roll also can't stop because of inertia force; therefore, the result that the air roll that causes as record head rotates in record, print quality worsens significantly.

In order to prevent the deterioration of this print quality, also exist such formation, promptly for the image recording structure of picture point battle array impact printer that works high-speed record, do not allow air roll just fix rotatably and print.In this image recording structure, enlarge the gap between record head and the air roll, prevent the damage of paper used for recording whereby.

, for this formation, produce and result from the variety of issue of expansion in the gap between record head and the air roll.For example, this occasion that is configured for dot matrix impact printer, because the expansion in the gap between record head and the air roll, the path increment of scalp acupuncture becomes bigger than setting, the root of scalp acupuncture weares and teares and the lost of life, and the actual job rate of image recording structure and reliability reduce.

The present invention, be on the basis of above-mentioned situation, to make, its purpose is, provide a kind of and can not enlarge the gap between record head and the air roll and prevent the damage of paper used for recording, and can prevent to result from the image recording structure of the deterioration of the print quality that stops to lag behind of air roll due to the inertia.

To achieve these goals, in the present invention, provide as lower device.

According to the 1st side of the present invention, a kind of image recording structure is provided, this image recording structure comprises record head, air roll, and the conveying mechanism of carrying paper used for recording along the each amount on demand of prescribed direction off and on, it is characterized in that, wherein have carrying of driving conveying mechanism and use drive source with paper, rotation drives the air roll drive source of air roll, and the required conveying capacity of working as paper used for recording surpasses ormal weight, perhaps the paper of paper used for recording is thick when surpassing specific thickness, in the action of carrying with paper, air roll is moved with drive source with drive source, when the required conveying capacity of paper used for recording less than ormal weight, perhaps the paper of paper used for recording is thick during less than specific thickness, the air roll drive source controlling organization that in the action of carrying with paper with drive source air roll is stopped with drive source.

Paper used for recording can be the cutter cut paper, also can be continuous paper.

Recording mode as being realized by record head though can adopt the mode of impacting or thermal transfer mode, is not limited thereto.

As carrying with drive source or air roll drive source,, be not limited thereto though can adopt stepper motor with paper.

Air roll drive source controlling organization though can be realized by the CPU (CPU) of according to the rules program work, is not limited thereto.This air roll drive source controlling organization, according to the paper of the required conveying capacity of paper used for recording and paper used for recording in thick either party controls the air roll drive source.

According to most preferred embodiment, when air roll drive source controlling organization, when air roll is moved with drive source, than carry action to stop constantly air roll being stopped with the action of drive source with paper with drive source.

According to the 2nd side of the present invention, a kind of image recording structure is provided, this image recording structure comprises record head, air roll, and the conveying mechanism of carrying paper used for recording along the each amount on demand of prescribed direction off and on, it is characterized in that, wherein have carrying of driving conveying mechanism and use drive source with paper, rotation drives the air roll drive source of air roll, and than carrying the action with drive source to begin earlier to make air roll to begin with the action of drive source with paper, the air roll drive source controlling organization that air roll is stopped than the moment that stops with the action of drive source with the paper conveying with the action of drive source.

According to most preferred embodiment, air roll is controlled the air roll drive source with the drive source controlling organization, so that make when air roll stops with the action of drive source, to be carved into and carry the time that stops the moment with the action of drive source with paper, be directly proportional with the required conveying capacity of paper used for recording, perhaps with thick being inversely proportional to of paper of paper used for recording.

When air roll stops with the action of drive source, be carved into and carry action to stop the time constantly, can thickly according to the paper of the required conveying capacity of paper used for recording or paper used for recording change continuously, also can be classified to variation with drive source with paper.

According to another most preferred embodiment, air roll is controlled the air roll drive source with the drive source controlling organization, so that make the transporting velocity of the paper used for recording of air roll generation, be lower than the transporting velocity of the paper used for recording that conveying mechanism produces, and thick proportional with the paper of the required conveying capacity of paper used for recording or paper used for recording.

The transporting velocity of the paper used for recording that air roll produces can also can be classified to change according to the required conveying capacity of paper used for recording or the thick variation continuously of paper of paper used for recording.

According to another most preferred embodiment, have when being failure to actuate with drive source with the paper conveying, stop the locking mechanism of the rotation of air roll.

As locking mechanism,, be not limited thereto though can adopt electromagnetic clutch.

According to another most preferred embodiment, have when air roll is failure to actuate with drive source, stop the locking mechanism of the rotation of air roll.

According to another most preferred embodiment, have according to the indication operation of being undertaken by the user, forbid the control action that carries out with the drive source controlling organization by air roll, and control the pressure controlling organization that air roll is used the action of drive source according to the indication operation.

According to the present invention, because according to having or not of the thick rotation of switching air roll of the paper of the required conveying capacity of paper used for recording or paper used for recording, perhaps than carry action to stop constantly air roll being stopped with the action of drive source with paper with drive source, prevent the damage of paper used for recording so can not enlarge the gap between record head and the air roll, and can prevent to result from the deterioration of the print quality that stops to lag behind of air roll due to the inertia.

That is to say because in the few occasion of the required conveying capacity of paper used for recording, perhaps, even do not make the air roll rotation, also do not have the danger of paper used for recording damage, so do not make the air roll rotation in the occasion of the paper thickness of paper used for recording.Whereby, can prevent to result from the deterioration of the print quality that stops to lag behind of air roll.In addition, if because than carry action to stop constantly air roll being stopped with the action of drive source with paper with drive source, then can guarantee stopping the time of air roll fully, so can prevent to result from the deterioration of the print quality that stops to lag behind of air roll.In addition, as the occasion of all the time air roll being fixed, owing to there is no need to enlarge gap between record head and the air roll,, result from the problem that enlarges the gap between record head and the air roll so can avoid the damage of the scalp acupuncture in the impact printer such.

In addition, carrying with paper when being failure to actuate with drive source if do, stoping the rotation of air roll by locking mechanism, then air roll can not rotate in the impact owing to writing down due to the record head, can keep print quality more well.

In addition,, stop the rotation of air roll, then can further shorten stopping the time of air roll, can keep print quality more well by locking mechanism if do when air roll is failure to actuate with drive source.

Other features and advantages of the present invention can become more apparent by the following detailed description of carrying out with reference to accompanying drawing.

Fig. 1 is the local summary side elevation of conduct according to the impact printer of an example of image recording structure of the present invention.

Fig. 2 is the local approximate vertical view of the impact printer shown in Fig. 1.

Fig. 3 is the cutaway view of the A-A direction of arrow among Fig. 2.

Fig. 4 is the summary circuit block diagram of the impact printer shown in Fig. 1.

Fig. 5 illustrates the air roll that is carried out with MPU by the air roll Electric Machine Control shown in Fig. 4 flow chart of the control treatment step of drive source.

Fig. 6 is the key diagram of explanation with the relation of the spinning movement of the spinning movement of the output shaft of paper conveying usefulness drive source and the output shaft that air roll is used drive source.

Fig. 7 illustrates the air roll that is carried out with MPU by the air roll Electric Machine Control among another embodiment flow chart of the control treatment step of drive source.

Fig. 1 is the local summary side elevation of conduct according to the impact printer of an example of image recording structure of the present invention, in the gap between record head 1, air roll 2, arranging the transport path of the paper used for recording 3 that constitutes by continuous paper and the transport path of colour band 4.Paper used for recording 3 is carried along the direction of arrow by last feeder 5 and following feeder 6.Last feeder 5 and following feeder 6 by carrying with drive source 7 with paper of being made of stepper motor, rotate driving via being installed in the paper conveying with belt pulley 7a on the output shaft of drive source 7 and endless-belt 8.Endless-belt 8 is adjusted tension force by idler roller 9.

Fig. 2 is the local approximate vertical view of the impact printer shown in Fig. 1, and Fig. 3 is the cutaway view of the A-A direction of arrow among Fig. 2, and record head 1 is installed on the straight line shuttle body 12 that can move back and forth along support bar 11.On record head 1, though do not draw, 14 stature pieces are being set along main scanning direction, a piece has along 12 of main scanning directions, along 24 of sub scanning directions, amounts to 288 scalp acupunctures.

On an end of the rotating shaft 13 of air roll 2, belt pulley 14 is installed, stride across this belt pulley 14 and be fixed on the air roll that constitutes by stepper motor with the belt pulley 17 on the output shaft 16 of drive source 15, the endless-belt 18 of reeling.Endless-belt 18 is adjusted tension force by idler roller 19.

The a pair of feeder 5 of going up is installed on the rotating shaft 21, utilizes the sprocket hole 22 that forms every predetermined distance on the width two ends of paper used for recording 3, carries paper used for recording 3.A pair of feeder 6 down is installed on the rotating shaft 23, utilizes the sprocket hole 22 that forms every predetermined distance on the width two ends of paper used for recording 3, carries paper used for recording 3.

On an end of the rotating shaft 13 of air roll 2, electromagnetic clutch 24 as locking mechanism is installed, this electromagnetic clutch 24, under the state of in the solenoid of interior dress, not switching on, mechanically lock rotating shaft 13, stop the rotation of rotating shaft 13, under the state of in the solenoid of interior dress, switching on, remove the mechanical caging of rotating shaft 13, allow the rotation of rotating shaft 13.

Fig. 4 is the summary circuit block diagram of the impact printer shown in Fig. 1, carry with drive source 7 with paper, control with the motor control signal of MPU (microprocessing unit) 31 by controlling from paper pushing motor, air roll is with drive source 15, by controlling with the motor control signal of MPU 32 from the air roll Electric Machine Control.Electromagnetic clutch 24 is controlled with the excitation control signal of MPU 31 by controlling from paper pushing motor.Paper pushing motor is controlled with MPU 31 and air roll Electric Machine Control MPU 32, controls by upper MPU 33, and in upper MPU33, input is from the operation signal of the guidance panel 34 that has the key switch group who is operated by the user.Control with among the MPU 31 at paper pushing motor, from carrying with paper, use among the MPU 32, from air roll drive source 15 input coding device signals in the air roll Electric Machine Control with drive source 7 input coding device signals.Though do not draw, to use among the MPU 32 with MPU 31 and air roll Electric Machine Control in paper pushing motor control, ROM (read-only storage), RAM (random access memory), timer circuit etc. are connecting bus.

The following describes the summary of action.In when record, according to the data of the image scalp acupuncture of outstanding activation record head 1 selectively, the front end of scalp acupuncture is contacted with the recording surface of paper used for recording 3 via colour band 4.Whereby, the color of colour band 4 is transferred on the recording surface of paper used for recording 3 with point-like, thus record and the corresponding image of view data.At this moment, paper used for recording 3 is because pressured paper bowl 2 limits moving of the thick direction of paper, so the impact that paper used for recording 3 can the excuse pin and escaping.This action along with straight line shuttle body 12 repeats along moving of support bar 11, is just write down the image of 1 bandwidth on the recording surface of paper used for recording 3.

When writing down the image of 1 bandwidth by the once past moving or double action of straight line shuttle body 12, move with MPU 31 instruction paper feedings to paper pushing motor control from upper MPU 33, whereby, paper pushing motor control is with MPU 31, to carrying with drive source 7 output motor control signals with paper.As a result, carry the output shaft with drive source 7 to rotate with paper, its rotatory force is delivered to rotating

shaft

21,23 via belt pulley 7a and endless-belt 8, and last feeder 5 and following feeder 6 rotate, and outcome record is transferred with the direction of arrow of paper 3 along Fig. 1.The conveying capacity of this moment is determined by the zone of having write down and the distance in the zone that is about to record, carries with drive source 7 by driving with the corresponding step number of this conveying capacity with paper.That is to say, though planning in images such as the literal of record or the figure zone continuous along the throughput direction of paper used for recording 3, the record width of the sub scanning direction that produces according to record head 1 is carried paper used for recording 3, but in the non-existent white space of image of plan record or the border of page or leaf etc., carry paper used for recording 3 according to the longer distance of record width of the sub scanning direction that produces than record head 1.

At this moment, electromagnetic clutch 24 is controlled by paper pushing motor and is controlled with MPU 31, is carrying with in the action of drive source 7 with paper, and the locking of 24 pairs of rotating shafts 13 of electromagnetic clutch is disengaged, and becomes air roll 2 rotary states.Air roll 2 pressured paper bowl Electric Machine Control are controlled with MPU 32, required conveying capacity according to paper used for recording 3, the occasion of rotation and the occasion of not rotating are arranged, the occasion of this external rotation, the moment that air roll stops with the action of drive source 15 is also different with the moment that the action of carrying with paper with drive source 7 stops, about this air roll 2 or air roll will be addressed hereinafter with the details of the movement of drive source 15.

So, each in moving and double action at straight line shuttle body 12 repeats the record that undertaken by record head 1 and by the paper feeding of carrying out with drive source 7 with the paper conveying, image is recorded on the paper used for recording 3.

Fig. 5 illustrates the air roll that is carried out with MPU 32 by the air roll Electric Machine Control shown in Fig. 4 flow chart of the control treatment step of drive source 15, and the movement of air roll 2 is described with reference to this flow chart.

At first, the air roll Electric Machine Control judges whether to have imported paper feeding action command (S1) from upper MPU 33 with MPU 32.That is to say,, supply with paper pushing motor control simultaneously and use MPU 32 both sides, so whether investigation has imported this paper feeding action command with MPU 31 and air roll Electric Machine Control owing to paper feeding action command from upper MPU 33.

If imported paper feeding action command (S1: be) from upper MPU 33, then the air roll Electric Machine Control is judged with paper and is carried the driving step number with drive source 7 whether to surpass regulation step number (S2) with MPU 32.That is to say, owing to when upper MPU 33 imports the paper feeding action commands, also import the data of the required conveying capacity of relevant paper used for recording 3, so whether this required conveying capacity of investigation surpasses setting.

If carry the driving step number with drive source 7 to surpass regulation step number (S2: be) with paper, then the air roll Electric Machine Control is calculated and is planned to drive the driving step number (S3) of air roll with drive source 15 with MPU 32.That is to say, because air roll 2 Heavy Weight inertia force are big, even so air roll is stopped with the action of drive source 15, air roll 2 also continues rotation because of inertia force, cause in the action that makes air roll with drive source 15 and stop to stop corresponding to occasion constantly with carry action with paper constantly with drive source 7, because the rotation of air roll 2 is not also stopped by record head 1 opening entry, thereby print quality degradation, so calculate the driving step number of air roll, so that the action of air roll with drive source 15 stopped constantly to set for than carry the action with drive source 7 to stop constantly more Zao with paper with drive source 15.

At this moment, air roll is calculated as with the driving step number of drive source 15, make when air roll stops with the action of drive source 15, to be carved into and carry action to stop the time constantly, and carry the conveying capacity of the paper used for recording 3 of using drive source 7 generations proportional with paper with drive source 7 with paper.That is to say, in the big occasion of the conveying capacity of paper used for recording 3, because the rotational time of air roll 2 is long, and as hereinafter addressing the rotary speed quickening, so it is big that energy stored becomes, the result stops needs more time, carries the time that stops the moment with the action of drive source 7 so will extend to be carved into paper when air roll stops with the action of drive source 15.

Then, the air roll Electric Machine Control is calculated the actuating speed (S4) of air roll with drive source 15 with MPU 32.That is to say, in the big occasion of the conveying capacity of paper used for recording 3, because if the difference of the peripheral speed of the peripheral speed of last feeder 5 and following feeder 6 and air roll 2 is very big, paper used for recording 3 subject to damage then, so calculate the actuating speed of air roll with drive source 15, so that make the transporting velocity of the paper used for recording 3 of air roll 2 generations, be lower than the transporting velocity of the paper used for recording 3 of going up feeder 5 and 6 generations of following feeder, and proportional with the required conveying capacity of paper used for recording 3.

Then, the air roll Electric Machine Control begins the driving (S5) of air roll with drive source 15 with MPU 32.That is to say that beginning is to air roll drive source 15 supply drive pulses.Air roll rotates with the output shaft 16 of drive source 15 whereby, and its rotatory force is delivered to rotating shaft 13 via belt pulley 17, endless-belt 18 and belt pulley 14, thus air roll 2 rotations.

Fig. 6 is the key diagram of explanation with the relation of the spinning movement of the spinning movement of the output shaft of paper conveying usefulness drive source 7 and the output shaft 16 that air roll is used drive source 15, here, carrying with paper when equating with the rotary speed of the output shaft 16 of drive source 15 with the rotary speed of the output shaft of drive source 7 and air roll, the peripheral speed of last feeder 5 and following feeder 6 just can equate with the peripheral speed of air roll 2.In Fig. 6, the longitudinal axis is a rotary speed, and transverse axis is to drive step number, represents the spinning movement of air roll with the output shaft 16 of drive source 15 with solid line, represents to carry with paper the spinning movement of the output shaft of using drive source 7 with the single-point line.Can understand from Fig. 6, air roll stops constantly with the driving of the output shaft 16 of drive source 15, than stopping to want Zao constantly with the driving of paper conveying with the output shaft of drive source 7, air roll is with the rotary speed of the output shaft 16 of drive source 15, than carrying the rotary speed of the output shaft of using drive source 7 slow with paper in addition.This is because the air roll Electric Machine Control drives the cause of air roll with drive source 15 with MPU 32 according to the result of calculation among step S3, the S4, by such control air roll 2, can seek to prevent the damage of paper used for recording 3 and prevent that the deterioration of print quality from getting both.

Then, the air roll Electric Machine Control judges with MPU 32 whether air roll finishes (S6) with the driving of drive source 15.That is to say whether investigation has driven air roll drive source 15 by the step number of calculating in step S3.

If air roll finishes (S6: be) with the driving of drive source 15, then finish this program.Even the air roll driving of drive source 15 though be through with, air roll 2 also continues rotation because of inertia force, but because in this moment, be driven with drive source 7 with the paper conveying, paper used for recording 3 is being transferred, record head 1 does not carry out record as yet, so even air roll 2 rotations, print quality can not worsen yet.Then, in the moment of carrying with paper with the driving end of drive source 7, air roll 2 stops.That is to say that the amount of deceleration in advance shown in Fig. 6 is prediction air roll 2 required time of stopping such as rule of thumb to be worth to set.

If in step S6, air roll does not finish (S6: not), then return step S6 and wait for that air roll finishes with the driving of drive source 15 as yet with the driving of drive source 15.

If in step S2, carry driving step number not surpass regulation step number (S2: not), then finish this program with drive source 7 with paper.That is to say, owing to carry the driving step number with drive source 7 to be no more than the regulation step number with paper, just the required conveying capacity of paper used for recording 3 is less than ormal weight, so even do not make air roll 2 rotations, paper used for recording 3 can not damage yet, and, owing to, can not guarantee stopping the time of air roll 2 in the occasion that makes air roll 2 rotations, even carry with paper with drive source 7 stop the moment after, air roll 2 also continues rotation because of inertia force, and print quality degradation is so otherwise make air roll 2 rotations.

If in step S1, not from upper MPU 33 input paper feeding action commands (S1: not), then return step S1 and wait for from upper MPU 33 input paper feeding action commands.

Though above action is a state of controlling the rotation of air roll 2 automatically, by the user key switch group of guidance panel 34 is implemented the operation of regulation, can switch to the state of the rotation of manual control air roll 2.That is to say, the key switch group of guidance panel 34 is implemented the operation of regulation by the user, can do in carrying with the action of drive source 7 with paper make air roll move with drive source 15 yet, perhaps, also can do air roll is moved with drive source 15.

Moreover, though in the above-described embodiments, formation is determined in advance amount of deceleration or the actuating speed of air roll with drive source 15 according to the conveying capacity of paper used for recording 3, but also can constitute thick amount of deceleration or the actuating speed in advance of determining air roll with drive source 15 of paper according to paper used for recording 3.The control treatment step of the air roll usefulness drive source 15 that is carried out with MPU 32 by the air roll Electric Machine Control of this moment is described with reference to the flow chart shown in Fig. 7.

At first, the air roll Electric Machine Control judges whether to have imported paper feeding action command (S11) from upper MPU 33 with MPU 32.That is to say,, supply with paper pushing motor control simultaneously and use MPU 32 both sides, so whether investigation has imported this paper feeding action command with MPU 31 and air roll Electric Machine Control owing to paper feeding action command from upper MPU 33.

If imported paper feeding action command (S11: be) from upper MPU 33, then the air roll Electric Machine Control judges that with MPU 32 paper of paper used for recording 3 is thick whether above specific thickness (S12).That is to say,, investigate the thick setting that do not surpass of this paper owing to when upper MPU 33 imports the paper feeding action commands, also import the thick data of paper of relevant paper used for recording 3.Here so-called paper is thick, is meant the occasion of pasting other paper as on the part of for example each page of paper used for recording 3, paper thickness ununiformity a period of time of paper used for recording 3, the size of thick.

If the thick specific thickness (S12: be) that surpasses of the paper of paper used for recording 3, then the air roll Electric Machine Control is calculated and is planned to drive the driving step number (S13) of air roll with drive source 15 with MPU 32.That is to say, because air roll 2 Heavy Weight inertia force are big, even so air roll is stopped with the action of drive source 15, air roll 2 also continues rotation because of inertia force, cause in the action that makes air roll with drive source 15 and stop to stop corresponding to occasion constantly with carry action with paper constantly with drive source 7, because the rotation of air roll 2 is not also stopped by record head 1 opening entry, thereby print quality degradation, so calculate the driving step number of air roll, so that the action of air roll with drive source 15 stopped constantly to set for than carry the action with drive source 7 to stop constantly more Zao with paper with drive source 15.

At this moment, air roll is calculated as with the driving step number of drive source 15, makes to be carved into paper when air roll stops with the action of drive source 15 to carry the time that stops the moment with the action of drive source 7, with thick being inversely proportional to of paper of paper used for recording 3.That is to say, in the thick occasion of the paper of paper used for recording 3, if because time that air roll 2 is stopped is long, then paper used for recording 3 damage easily, so will shorten the time that stops the moment with the paper conveying with the action of drive source 7 that when air roll stops with the action of drive source 15, is carved into.

Then, the air roll Electric Machine Control is calculated the actuating speed (S14) of air roll with drive source 15 with MPU 32.That is to say, in the thick occasion of the paper of paper used for recording 3, because if the difference of the peripheral speed of the peripheral speed of last feeder 5 and following feeder 6 and air roll 2 is very big, paper used for recording 3 subject to damage then, so calculate the actuating speed of air roll with drive source 15, so that make the transporting velocity of the paper used for recording 3 of air roll 2 generations, be lower than the transporting velocity of the paper used for recording 3 of going up feeder 5 and 6 generations of following feeder, and thick proportional with the paper of paper used for recording 3.

Then, the air roll Electric Machine Control begins the driving (S15) of air roll with drive source 15 with MPU 32.That is to say that beginning is to air roll drive source 15 supply drive pulses.Whereby, air roll rotates with the output shaft 16 of drive source 15, and its rotatory force is delivered to rotating shaft 13 via belt pulley 17, endless-belt 18 and belt pulley 14, thus air roll 2 rotations.

Then, the air roll Electric Machine Control judges with MPU 32 whether air roll finishes (S16) with the driving of drive source 15.That is to say whether investigation has driven air roll drive source 15 by the step number of calculating in step S13.

If air roll finishes (S16: be) with the driving of drive source 15, then finish this program.Even the air roll driving of drive source 15 though be through with, air roll 2 also continues rotation because of inertia force, but because in this moment, be driven with drive source 7 with the paper conveying, paper used for recording 3 is being transferred, record head 1 does not carry out record as yet, so even air roll 2 rotations, print quality can not worsen yet.Then, in the moment of carrying with paper with the driving end of drive source 7, air roll 2 stops.

If in step S16, air roll does not finish (S16: not), then return step S16 and wait for that air roll finishes with the driving of drive source 15 as yet with the driving of drive source 15.

If in step S12, the thick specific thickness (S12: not), then finish this program that do not surpass of the paper of paper used for recording 3.That is to say, if because the paper thickness rate specific thickness of paper used for recording 3 will approach, even then do not make air roll 2 rotations, paper used for recording 3 can not damage yet, so otherwise make air roll 2 rotations.

If in step S11, not from upper MPU 33 input paper feeding action commands (S11: not), then return step S11 and wait for from upper MPU 33 input paper feeding action commands.

In addition, though in the above-described embodiments, as long as the required conveying capacity of paper used for recording 3 surpasses setting, perhaps the paper of paper used for recording 3 is thick in specific thickness, just in the action of carrying with paper, air roll is moved with drive source 15 with drive source 7, and, in advance amount of deceleration and air roll can according to the required conveying capacity of paper used for recording 3 or paper is thick be changed with the actuating speed of drive source 15, but also can constitute, as long as the required conveying capacity of paper used for recording 3 surpasses setting, perhaps the paper of paper used for recording 3 is thick in specific thickness, just only carry out a kind of control in following two kinds of controls, promptly in the action of carrying with paper, make the control of air roll, perhaps make in advance amount of deceleration and air roll use the actuating speed of drive source 15 can be according to the required conveying capacity or the thick control that changes of paper of paper used for recording 3 with drive source 15 actions with drive source 7.

And then, also can constitute, only make in advance amount of deceleration and air roll with a certain side in the middle of the actuating speed of drive source 15, can according to the required conveying capacity of paper used for recording 3 or paper is thick change.

In addition, though in the above-described embodiments, constitute electromagnetic clutch 24 is set, when being failure to actuate with drive source 7 with the paper conveying, stop the rotation of air roll 2, but also can constitute, control electromagnetic clutch 24 with MPU 32 by the air roll Electric Machine Control, when air roll is failure to actuate with drive source 15, stop the rotation of air roll 2 by electromagnetic clutch 24.And then, also electromagnetic clutch 24 can be set.

In addition, though in the above-described embodiments, formation can lean on guidance panel 34 to switch to manual state of a control, also can constitute, and can not switch to manual state of a control.

As above explanation, according to the present invention, because according to having or not of the thick rotation of switching air roll of the paper of the required conveying capacity of paper used for recording or paper used for recording, perhaps than carry action to stop constantly air roll being stopped with the action of drive source with paper with drive source, prevent the damage of paper used for recording so can not enlarge the gap between record head and the air roll, and can prevent to result from the deterioration of the print quality that stops to lag behind of caused by inertia air roll.

Claims

1. image recording structure, this image recording structure comprises record head, air roll, and carry the conveying mechanism of paper used for recording off and on along the each amount on demand of prescribed direction, and it is characterized in that, wherein have

Drive carrying of aforementioned conveying mechanism and use drive source with paper,

Rotation drives the air roll drive source of aforementioned air roll, and

When the required conveying capacity of aforementioned paper used for recording surpasses ormal weight, perhaps the paper of aforementioned paper used for recording is thick when surpassing specific thickness, in aforementioned action of carrying with paper, aforementioned air roll is moved with drive source with drive source, when the required conveying capacity of aforementioned paper used for recording less than ormal weight, perhaps the paper of aforementioned paper used for recording is thick during less than specific thickness, the air roll drive source controlling organization that in aforementioned action of carrying with paper with drive source aforementioned air roll is stopped with drive source.

2. according to the image recording structure described in the claim 1, wherein when aforementioned air roll drive source controlling organization, when aforementioned air roll is moved with drive source, carry action to stop constantly aforementioned air roll being stopped with the action of drive source with paper with drive source than aforementioned.

3. image recording structure, this image recording structure comprises record head, air roll, and carry the conveying mechanism of paper used for recording off and on along the each amount on demand of prescribed direction, and it is characterized in that, wherein have

Rotation drives the air roll drive source of aforementioned air roll, and

Carry action to begin earlier to make aforementioned air roll to begin than aforementioned with paper, stop the air roll drive source controlling organization that the moment earlier makes aforementioned air roll stop with the action of drive source with the paper conveying with the action of drive source than aforementioned with the action of drive source with drive source.

4. according to the image recording structure described in claim 2 or 3, wherein aforementioned air roll is controlled aforementioned air roll drive source with the drive source controlling organization, aforementionedly carry the time that stops the moment with the action of drive source so that make when aforementioned air roll stops with the action of drive source, to be carved into paper, be directly proportional with the required conveying capacity of aforementioned paper used for recording, perhaps with thick being inversely proportional to of paper of aforementioned paper used for recording.

5. according to the image recording structure described in the claim 2 to 4 any one, wherein aforementioned air roll is controlled aforementioned air roll drive source with the drive source controlling organization, so that make the transporting velocity of the aforementioned paper used for recording of aforementioned air roll generation, be lower than the transporting velocity of the aforementioned paper used for recording that aforementioned conveying mechanism produces, and thick proportional with the paper of the required conveying capacity of aforementioned paper used for recording or aforementioned paper used for recording.

6. according to the image recording structure described in the claim 1 to 5 any one, this device has when aforementioned and carries when being failure to actuate with drive source with paper, stops the locking mechanism of the rotation of aforementioned air roll.

7. according to the image recording structure described in the claim 1 to 5 any one, this device has when aforementioned air roll is failure to actuate with drive source, stops the locking mechanism of the rotation of aforementioned air roll.

8. according to the image recording structure described in the claim 1 to 7 any one, this device has according to the indication operation of being undertaken by the user, forbid the control action that carries out with the drive source controlling organization by aforementioned air roll, control the pressure controlling organization of aforementioned air roll with the action of drive source and operate according to aforementioned indication.