JPH05345450A - Recording device - Google Patents

Abstract

PURPOSE:To eliminate an adverse effect to the paper feeding operation at the time of increasing the load in the operations without generating the necessity of making a motor larger or increasing noise when paper feeding of recording paper and other operations such as recovery of suction of a recording head are driven by a common motor. CONSTITUTION:A paper feed mechanism 9 for recording paper 2 and other operation mechanisms such as a suction recovery mechanism 13 for a feed outlet are driven by one motor 8, and power supplied to the motor 8 is temperarily increased in synchronization with the timing when the veriable load of other operation mechanisms 13 gets larger to increase the torque.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording on a recording material by recording means.

[0002]

2. Description of the Related Art A recording device having a function such as a printer, a copying machine, a facsimile, or a recording device used as an output device such as a composite electronic device including a computer, a word processor, etc., a workstation, etc. Image (including characters etc.) on the recording material (recording medium) such as paper or plastic thin plate based on
Is configured to record. The recording device can be classified into an ink jet type, a wire dot type, a thermal type, a laser beam type and the like depending on the recording type.

In a serial type recording apparatus which employs a serial scan system in which main scanning is performed in a direction intersecting a conveying direction (sub-scanning direction) of a recording material, the recording material is set at a predetermined recording position and then the recording material is recorded. An image is recorded (main scanning) by a recording device mounted on a carriage that moves along the material, and a predetermined amount of paper is fed (conveyed material to be recorded) after the recording for one line is completed, and then again. The recording of the entire recording material is performed by repeating the operation of recording (main scanning) the image of the next row on the recording material that has stopped. On the other hand, in a line type recording apparatus that records only by sub-scanning in the conveying direction of the recording material, the recording material is set at a predetermined recording position, and the recording is performed continuously for one line while recording one line at a time. Feeding (pitch feeding) is performed to record the entire recording material.

Of the above recording apparatuses, an inkjet recording apparatus (inkjet recording apparatus) is configured to eject ink from a recording unit (recording head) in accordance with an image signal and perform recording on a recording material. In addition, it is easy to make the recording means compact, it is possible to record high-definition images at high speed, it is possible to record on plain paper without requiring special processing, the running cost is low, and the non-impact method is used. Therefore, there is an advantage that there is little noise and that it is easy to record a color image using multicolor ink. Among them, the line type using a full multi type recording means in which a large number of ejection openings are arranged in the paper width direction can further speed up recording.

In particular, an ink jet type recording means (recording head) for ejecting ink by utilizing heat energy,
Through the semiconductor manufacturing process such as etching, vapor deposition, and sputtering, the electrothermal converter formed on the substrate, the electrode,
By forming a liquid path wall, a top plate, etc., it is possible to easily manufacture a product having a high-density liquid path arrangement (ejection opening arrangement), a simple and compact structure, and a high-resolution image at high speed. Can be recorded. On the other hand, there are various requirements for the material of the recording material. In recent years, in addition to plain paper and resin thin plate (OHP, etc.) which are ordinary recording materials, thin paper and processed paper (punch holes for filing). It has become necessary to use attached paper, perforated paper, paper of arbitrary shape, etc.

In the above ink jet recording apparatus,
Since the ink is ejected directly from the minute ejection port provided on the ejection port formation surface facing the recording material, the amount of water evaporation of the ink near the ejection port increases with the passage of time and the ink viscosity increases, Air bubbles may be mixed in the ink in the mouth, or dust such as paper powder may be attached to the vicinity of the ejection port, which may cause clogging of the ejection port and cause ejection failure. As a means for eliminating (recovering) such a discharge failure, for example, a suction recovery means of a system in which a discharge port is sealed with a cap and a negative pressure is generated in the cap to suck ink from the discharge port is used. ing.

Further, in the recording apparatus including the above-mentioned ink jet recording apparatus, the other operating means is driven by using the drive source (motor) of the conveying means for feeding the recording material during the recording operation. It has been practiced to drive the conveying means and other operating means by a common motor. In the case of an ink jet recording apparatus, the suction recovery means may be selected as the other operating means. Then, as the suction recovery means, a tube pump of a type in which a tube connected to the cap is pressed by a pressure roller may be used.

[0008]

However, in the conventional recording apparatus constructed so that the common motor drives the other operating means such as the conveying means for the recording material and the suction recovery means, the paper feeding is performed. Since other actuating means are simultaneously driven at the same time (when the recording material is conveyed), it is necessary to make the motor large in size, and there are problems such as an increase in the size of the recording apparatus and an increase in motor noise. Further, when the motor is made smaller, there is a problem that unevenness in conveyance of the recording material occurs, image streaks occur, and the recording quality deteriorates.

The present invention has been made in view of the above technical problems, and an object of the present invention is to provide a drive source for a conveying means for recording material and a drive source for other operating means such as a suction recovery means. Even in common, it is an object of the present invention to provide a recording device capable of accurately feeding a recording material without being affected by other operating means during the paper feeding operation.

[0010]

SUMMARY OF THE INVENTION The recording apparatus according to the present invention supplies electric power to a paper feed mechanism when another mechanism driven by the same motor may adversely affect the paper feed operation. The object is achieved by temporarily increasing the power to power up the motor. That is, according to the present invention, in a recording apparatus that records on a recording material by the recording means, the conveying means for the recording material and other operating means are driven by the same motor, and a predetermined value for driving the other operating means. By providing the configuration in which the electric power supplied to the motor is increased at the timing of the above, it is possible to provide a recording apparatus capable of accurately feeding the recording material during the paper feeding operation without being affected by other operating means. It is a thing.

According to another aspect of the present invention, in addition to the above structure, the recording means is an ink jet recording means for ejecting ink to perform recording, and the other operating means is a pump for sucking ink from the ejection port of the recording means. Or a configuration in which the pump is a tube pump that presses a tube with a pressurizing roller, and the pressurizing roller is configured to increase the power supplied to the motor when pressing the tube. The above object is achieved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a main part configuration of an embodiment of a recording apparatus to which the present invention is applied, and FIG. 2 is a schematic perspective view of the recording apparatus of FIG. In FIG. 1 and FIG. 2, the recording material 2 such as a sheet or a plastic thin plate stacked in a cassette 1 for feeding is fed by rotating the feeding roller 3 so that the uppermost one is separated. Guide 4, 5
Supplied throughout.

When the paper feed roller 3 makes one rotation and stops at the position shown in FIG. 1, the carrying force for the recording material 2 disappears. However, at this time, the lower conveyance roller 9 is already rotationally driven by the pulse motor (recording material conveyance motor), and the leading end portion of the recording material 2 is composed of the lower conveyance roller 9 and the upper conveyance roller 10 which is driven to rotate. It is sandwiched between them. Therefore, the paper feed amount of the recording material 2 thereafter is regulated by the pair of conveying rollers 9 and 10. The pair of conveying rollers 9 and 10 (lower conveying roller 9) are rotationally driven by the pulse motor 8 via the belt 6 and the pulley 7.

The recording material 2 is further conveyed by the pair of conveying rollers 9 and 10, and the leading end portion thereof is the pair of discharging rollers 1.
When it is sandwiched between 1 and 12, it stops once. The paper discharge roller pair is composed of a paper discharge lower roller 11 and a paper discharge upper roller 12 pressed against the paper discharge roller 11 by spring means (not shown). The paper discharge lower roller 11 is driven by the pulse motor 8 which is common to the lower conveyance roller 9 and the gears 14, 15, 1
It is rotationally driven via 6. In this case, the lower discharge roller 1
The peripheral speed of 1 is set to be higher than the peripheral speed of the lower conveyance roller 9 by a predetermined ratio (for example, 2%).
The recording material 2 is held in a state where a predetermined tension is applied to the recording surface (a portion supported by the platen 17).

While the recording material 2 is positioned and held on the platen 17 (paper feed is stopped), the carriage 19 is moved along the guide rail 20 in the direction of arrow b (main scanning) and mounted on the carriage 19. The recording head 18 is driven based on the recording information to record one line (one line). When the recording for one line is completed, the conveying roller 9 is rotated by a predetermined amount in the direction of the arrow c, the recording material 2 is fed by one line (sub-scanning), and the recording of the next line is performed. After that, the paper feeding (sub-scanning) operation of the recording material 2 and the recording operation synchronized with the movement of the carriage 19 (main scanning) are alternately repeated to perform recording on the entire recording material 2. Recording material 2 for which recording has been completed
Is discharged to the discharge tray 21 by the discharge roller pairs 11 and 12. In this way, a series of recording operations is performed.

The recording head (recording means) 18 is an ink jet recording means for ejecting ink by utilizing heat energy, and has an electrothermal converter for generating heat energy. In addition, the recording head 18
Is to perform recording by ejecting ink from an ejection port by utilizing a pressure change caused by growth and contraction of bubbles due to film boiling caused by thermal energy applied by the electrothermal converter.

FIG. 3 is a partial perspective view schematically showing the structure of the ink ejection portion of the recording head 18. In FIG.
A predetermined gap (for example, about 0.5 to 2.
The discharge port forming surface 51 facing each other at a distance of about 0 mm is
A plurality of ejection openings 52 are formed at a predetermined pitch, and an electrothermal converter for generating energy for ejecting ink along the wall surface of each liquid passage 54 that connects the common liquid chamber 53 and each ejection opening 52 ( A heating resistor, etc.) 55 is provided. The recording head 18 is mounted on the carriage 19 in such a positional relationship that the ejection ports 52 are arranged in a direction intersecting the moving direction (main scanning direction) of the carriage 19. Thus
A recording unit that drives (energizes) the corresponding electrothermal converter 55 based on an image signal or an ejection signal to cause the ink in the liquid path 54 to film-boil and eject the ink from the ejection port 52 by the pressure generated at that time. A (recording head) 18 is configured.

If the ejection ports 52 of the recording head 18 are clogged during the above-described series of recording operations, defective ejection may occur at some of the ejection ports 52 and normal recording may be performed. It may not be possible. Such clogging can be recovered (resolved) by the recovery mechanism. That is, in the recording apparatus of FIGS. 1 and 2,
A suction recovery mechanism 13 is provided at a predetermined position outside the recording area. The suction recovery mechanism 13 seals the ejection port 52 of the recording head 18 with a cap 22 and uses a pump (suction pump).
By creating a negative pressure in the cap 22 via the tube 23 by 24, foreign matters (fixed ink, air bubbles, dust, etc.) are sucked out from each ejection port 52 together with the ink.

A transmission means (gear or belt pulley) 25 for driving the pump 24 is provided on the shaft of the lower conveyance roller 9. FIG. 4 is a schematic sectional view showing the structure of the suction recovery mechanism 13. In FIG. 4, the pump 24 is the discharge roller (conveying means) 9
Of the guide roller 30 and the pressure roller 31 rotatably supported on the outer peripheral portion of the guide roller 30, and the guide roller 30 is rotated by the arrow X. The tube 23 is crushed (pressed) by the pressure roller 31 by rotating in the direction, and the crushed position is moved over a predetermined range of the tube 23.

The tube 23 is formed of a rubber-like elastic material which can be crushed at least in a range where the pressure roller 31 comes into contact with the tube 23. One end of the tube 23 is connected to the cap 22 and the other end is discarded. It is connected to the ink tank 26. The tube 23 is held in a groove formed in the support base 33 in an arc shape concentric with the guide roller 30. The reference numeral 32 in FIG. 4 indicates the shaft of the guide roller 30. With the above, a tube pump used as the suction pump 24 of the suction recovery mechanism 13 is configured.

In FIG. 4, the conveying roller 9 is indicated by an arrow a.
(Fig. 2) The guide roller 3 is rotated by rotating in the direction
When 0 rotates in the direction of arrow X, the pressure roller 31 at the position A where it does not contact the tube 23 moves from position B to position C to position D.
The position is moved from the position to the position A, and the tube 23 is moved while pressing (crushing) the tube 23 in a predetermined range on the way. By such an operation, a negative pressure is formed in the portion of the ejection port 52 that is sealed (capped), ink is sucked from each ejection port 52 by the negative pressure, and the ink discharged into the cap 22 passes through the tube 23. The ink is sequentially introduced into the waste ink tank 26.

FIG. 5 is a block diagram showing the configuration of the control unit of the suction recovery mechanism 13. In order to perform the recovery process by the suction recovery mechanism 13, the CPU 2 which performs the above control.
7 and a RAM 28 used as a work area for the above processing
In addition, a ROM 29 or the like for storing program data including the above processing is required.

FIG. 6 is a flow chart showing the operation sequence of the recording apparatus to which the present invention is applied. In FIG.
When the recording apparatus is activated, the paper feeding operation of step S1 is performed prior to the recording operation (image forming operation). In this paper feeding operation, the paper feeding roller (pickup roller) 3 takes out the recording material 2 from the cassette 1, places it on the transport system, and transports it to the recording position. Next, the first recording operation (image forming operation) of step S2 is started. In this recording operation, while moving the carriage 19 along the guide rail 20 in the direction of arrow b (main scanning),
The recording head 18 on the carriage 19 is driven to perform the first recording (first line).

When the first recording operation is completed, step S
The first paper feed operation of No. 3 starts. FIG. 7 is a flowchart showing the operation sequence of the paper feed operation (subroutine) in FIG. Here, first, the operation of the conveying roller 9 (FIG. 2) and the pressure roller 31 (FIG. 4) in this embodiment.
The relationship of the positions will be described. In the present embodiment, the pressure roller 31 is moved to the position A immediately after the end of the sheet feeding operation (step S1).
(Fig. 4). After that, the pressure roller 31 moves from position A to position B (FIG. 4) when the first paper feeding operation is performed, and from position B to position C (FIG. 4) when the second paper feeding operation is performed. To the position D (FIG. 4) in the third paper feeding operation, and from the position D to the position A in the fourth paper feeding operation, and so on every time the paper feeding operation is performed. Is configured to. That is, the position of the pressure roller 31 is configured to return to the position A each time the paper feeding operation is performed four times, and move from the position A to the position B in the next paper feeding operation.

When the pump 24 is driven, when the pressure roller 31 moves from the state in which the tube 23 is not pressed to the state in which the tube 23 is crushed (pressed), the pressure roller 31 is pressed against the pressure roller 31. And a special big pressure acts,
The load on the drive source of the pump 24 (guide roller 30) increases. That is, when the pressure roller 31 moves from the position A to the position B, the load applied to the motor (driving source) 8 that is common to the transport roller 9 becomes particularly larger than when the pressure roller 31 moves in other ranges.

Therefore, in the paper feeding operation (subroutine) of FIG. 7, first, in step S21, the number of paper feeding counted immediately after the end of the paper feeding operation is the first time, the fifth time, the ninth time, the thirteenth time, and the seventeenth time. , The 21st time, the 25th time, the 29th time. If yes (Y), proceed to step S22; if not (N), proceed to step S28.

First, the operation in the case of advancing to step S22 due to the above number of times will be described. In step S22, the current for rotating the motor (pulse motor) 8 at the time of feeding the paper is set to a current Hi higher than usual (for example, the current Hi higher than usual is 0.9 A, and the current L
o is selected to be 0.45A). The reason will be described in detail below.

As described above, in this embodiment, the pulse motor 8 is used as the drive source for feeding the paper. The motor 8 is also used as a drive source of the suction recovery mechanism 13 (pump 24), and when either one of the paper feeding mechanisms 9 and 11 and the suction recovery mechanism 13 is driven, the other mechanism rotates together. Is configured. Therefore,
When the paper is fed during image formation (recording operation), the phenomenon of rotation occurs, and when the paper is fed by driving the transport motor (pulse motor) 8, the pump 24 of the suction recovery mechanism 13 rotates together. ..

Therefore, when the paper is fed while the pressure roller 31 is in the position A, the pressure roller 31 moves to the tube 2
3 moves from the A position where the tube 23 is not pressed to the B position where the tube 23 is pressed (crushed), and the force (load) applied to the motor 8 increases due to the reason described above.
That is, in the prior art, if the motor in consideration of the normal load is used, the operation of the motor is hindered when the pressure roller 31 moves from the position A to the position B, and the paper feeding operation is adversely affected. There is a fear.

Therefore, in this embodiment, the pressure roller 31 is
When moving between the position and the B position, that is, once every four paper feed operations (the number of paper feeds counted immediately after the end of the paper feed operation is the first, the fifth, the ninth, the thirteenth, The current supplied to the conveyance motor (pulse motor) 8 at the 17th time, 21st time, 25th time, 29th time-) is made higher than usual to increase the torque of the motor 8 to hinder the paper feeding operation. Control not to. Therefore, in step S23, the motor 8 is rotated with the current Hi set in step S22 which is higher than usual.

Then, in step S24, it is determined whether or not the motor rotation operation is completed. If it is not completed, the procedure returns to step S23 to rotate the motor 8, and if it is completed, the procedure is advanced to step S25. The excitation time to stop 8 against its inertia is set to a longer time than usual (LONG). Then, step S2
In step 6, motor excitation for stopping the motor 8 is applied, and in step S27, the paper feeding operation ends.

Here, the reason why the excitation time is set to a longer time (LONG) than usual in step S25 will be described. When the number of times of paper feeding in step S21 corresponds to the above number ((in the case of Y)), the pressure roller 31 passes between the A position and the B position as described above, so that the motor 8 is driven. The supplied current has a high value Hi,
The torque of the motor 8 is large. for that reason,
The inertial force after the rotation operation of the motor 8 is completed is also larger than usual, and in order to stop the motor 8 accurately, it is necessary to set the excitation time for stopping the motor 8 longer than usual. The long excitation time (LONG) is set to about 500 msec, for example.

Next, description will be made regarding the operation in the case of proceeding to step S28 because the number of times of paper feeding does not correspond to each of the above numbers in step S21. That is, the pressure roller 31 is located at the position B →
The paper feeding operation and the excitation time when moving the areas of position C, position C → position D, position D → position A (other than the area of position A → position B) will be described. First, step S28
The current supplied to the motor 8 by the normal value Lo (for example,
0.45 A), and in step S29, the motor 8 is driven by the current Lo.

Then, in step S30, it is determined whether or not the motor rotation operation is completed. If it is not completed, the procedure returns to step S29 to rotate the motor 8, and if it is completed, the procedure proceeds to step S31. The excitation time to stop 8 against its inertial force is set to the normal time (SHORT). Then, similarly to the above, motor excitation for stopping the motor 8 is applied in step S26, and the paper feeding operation is ended in step S27.
In this case, in step S31, the excitation time for stopping the rotation of the motor 8 against its inertia is
Since the drive current of the motor 8 is the usual value Lo, it is set to about 200 msec, for example.

In FIG. 6, after the first paper feeding operation of step S3 (paper feeding operation based on the subroutine detailed in FIG. 7) is completed, the second recording operation (image forming operation) is performed in step S4. In step S5, the second paper feeding operation (see FIG. 7) is performed. After that, the recording operation (image forming operation) and the paper feeding operation of the third and fourth times are repeatedly executed, and the final time (for example,
After the (thirty-third) recording operation is completed, the recording material 2 is discharged by the paper discharge operation in step S7, and the recording operation on the recording material 2 is completed.

According to the embodiment described above, the conveying means (conveying roller 9) for feeding the recording material 2 such as recording paper and the other operating means such as the pump 24 of the suction recovery mechanism 13 are the same. While being driven by the motor (pulse motor) 8, the electric power (current) supplied to the motor 8 is higher than the normal value only at the timing when the resistance of the other operating means 24 increases and the load of the motor 8 increases. Since it is configured to be large, even when there is a possibility that the paper feeding operation may be adversely affected by the overload of the motor 8, it is possible to temporarily power up the motor 8.
It is possible to feed the paper accurately without being affected by the other actuating means 24. As a result, even when the drive source of the conveying means 9 for the recording material 2 and the drive source of other operating means such as the suction recovery means 13 are shared, the motor as the drive source becomes large and the noise increases. In this way, it is possible to eliminate the unevenness in the conveyance of the recording material 2 and to perform accurate paper feeding, and it is possible to prevent problems such as deterioration in recording quality and malfunction due to image streaks.

In the above-mentioned embodiment, the current value is controlled by distinguishing between two types, the region between A and B where the load of the pressure roller 31 is particularly large and the other region, but instead of this, , Between A and B moving from the non-contact state to the pressed state, between B and C that constantly press the tube 23, between C and D that moves from the pressed state to the non-contact state, and D that is always in the non-contact state.
The current value may be controlled according to these classifications by classifying into four types between A and A, or into several types other than that (for example, three types). Further, in the above-described embodiment, the current is used as the power to be changed, but the voltage may be changed and controlled.

In the above-described embodiment, the serial type recording apparatus for recording while moving the recording head 18 in the direction traversing the recording material 2 has been described as an example. The present invention can be similarly applied to a line-type recording apparatus that uses a line-type recording head having a length that covers the entire area or a part of the width direction and performs recording only by sub-scanning, and similar effects can be obtained. is there. Also,
In the case of an inkjet recording apparatus according to the present invention, the arrangement of the recording head is not limited to a cartridge type in which a recording head and an ink tank are integrated, and a configuration in which these are separated and connected by an ink supply tube or the like. Even such a thing can be similarly applied and the same effect can be achieved.

Further, in the above-described embodiment, the recording apparatus using one recording head 18 is described as an example, but the present invention is a color recording apparatus using a plurality of recording heads for recording in different colors, or The same operation can be performed regardless of the number of recording heads or the colors used, such as a recording apparatus for gradation recording using a plurality of recording heads that perform recording with the same color but different densities. It is possible to achieve the effect.

In the case of an ink jet recording apparatus, the present invention can be applied to, for example, one using a recording means (recording head) using an electromechanical transducer such as a piezo element, but among others, thermal energy is utilized. The present invention brings about an excellent effect in an ink jet recording apparatus of the type that ejects ink by means of a method. This is because such a system can achieve high density recording and high definition recording.

With regard to its typical structure and principle, see, for example, US Pat. Nos. 4,723,129 and 4740.
This is preferably done using the basic principles disclosed in US Pat. No. 7,967. This method can be applied to both the so-called on-demand type and the continuous type, but particularly in the case of the on-demand type, a liquid (ink) is used.
By applying at least one drive signal to the electrothermal converter arranged corresponding to the sheet or liquid path holding the , The heat energy is generated in the electrothermal converter to cause film boiling on the heat acting surface of the recording means (recording head), and as a result, bubbles can be formed in the liquid (ink) in a one-to-one correspondence with this drive signal. So effective.

Due to the growth and contraction of the bubbles, the liquid (ink) is ejected through the ejection openings to form at least one droplet. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness can be achieved. As this pulse-shaped drive signal, US Pat.
Those described in US Pat. Nos. 4,633,359 and 4,345,262 are suitable. Incidentally, US Pat. No. 43131 of the invention relating to the rate of temperature rise of the heat acting surface
If the conditions described in No. 24 are adopted, even more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the ejection port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. US Pat. No. 4,558,333 and US Pat. No. 4, which disclose a configuration in which a heat acting portion is arranged in a bending region.
The structure using the specification of 459600 is also included in the present invention. In addition, Japanese Laid-Open Patent Publication No. 123670/1984 discloses a configuration in which a common slit is used as a discharge portion of a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy. The present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 138461/1984, which discloses a configuration in which the above is associated with the discharge portion. That is, according to the present invention, recording can be reliably and efficiently performed regardless of the form of the recording head.

Further, as described above, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum width of a recording material (recording medium) which can be recorded by the recording apparatus. .. As such a recording head,
Either a configuration that satisfies the length by combining a plurality of recording heads or a configuration as one recording head integrally formed may be used. In addition, even with the serial type as in the above example, the recording head fixed to the device body,
Alternatively, a replaceable chip-type recording head that can be electrically connected to the device body and supply ink from the device body when mounted on the device body, or an ink tank is integrally provided on the recording head itself. The present invention is also effective when the above cartridge type recording head is used.

Further, it is preferable to add recovery means or preliminary auxiliary means to the recording head provided as a constitution of the recording apparatus in the present invention because the effect of the present invention can be further stabilized. Specifically, these are capping means, cleaning means, pressurizing or suctioning means, electrothermal converters or heating elements other than these, or preheating means for the recording head. It is also effective to perform stable recording by performing a preliminary discharge mode in which discharge different from recording is performed.

As described above, regarding the type and number of recording heads to be mounted, for example, only one is provided corresponding to a single color ink, or a plurality of recording heads having different recording colors and densities are provided. A plurality of inks may be provided corresponding to the ink. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but may be either the recording head is integrally configured or a plurality of combinations may be used. The present invention is also extremely effective for a device provided with at least one of color colors or full colors by color mixing.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but it is an ink that solidifies at room temperature or lower and softens or liquefies at room temperature, or an ink jet. In the method, the temperature of the ink itself is generally adjusted within a range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink is within a stable ejection range. Any liquid may be used. in addition,
Whether the temperature rise due to thermal energy is positively used as the energy for changing the state of the ink from the solid state to the liquid state, or the ink that solidifies when left standing for the purpose of preventing ink evaporation is used. In any case, the ink is liquefied by applying the thermal energy according to the recording signal and the liquid ink is ejected,
The present invention is also applicable to the case of using an ink which has a property of being liquefied only by thermal energy, such as one which has already started to solidify when it reaches the recording medium.

The ink in such a case is disclosed in JP-A-54-54.
As described in JP-A-56847 or JP-A-60-71260, a mode in which it is held as a liquid or a solid in a concave portion or a through hole of a porous sheet and faces the electrothermal converter. May be In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as a form of the ink jet recording apparatus according to the present invention, in addition to one used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmitting / receiving function. It may be in the form of the above.

[0050]

As is apparent from the above description, according to the present invention, in the recording apparatus for recording on the recording material by the recording means, the recording material conveying means and other operating means are driven by the same motor. In addition, since the electric power supplied to the motor is increased at a predetermined timing when the other actuating means is driven, even if the driving source of the conveying means and the other actuating means are common, Provided is a recording apparatus capable of accurately feeding a paper during the paper feeding operation without being affected by other operating means.

According to another aspect of the present invention, in addition to the above configuration,
The recording means is an ink jet recording means for discharging ink to perform recording, and the other operating means is a pump for sucking ink from the discharge port of the recording means, or the pump is a pressurizing roller to form a tube. It is a tube pump that presses, and since the power supply of the motor is increased when the pressure roller presses the tube, even when the recording material conveying means and the suction recovery mechanism are driven by a common motor. Provided is a recording apparatus capable of accurately feeding a recording material without being influenced by the drive of a suction recovery mechanism during the paper feeding operation.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing a schematic configuration of an embodiment of a recording apparatus to which the present invention is applied.

FIG. 2 is a schematic perspective view showing the main configuration of the recording apparatus of FIG.

FIG. 3 is a partial perspective view schematically showing the structure of an ink ejection portion of the recording means in FIG.

FIG. 4 is a schematic sectional view showing a schematic configuration of a suction recovery mechanism in FIG.

5 is a block diagram showing a schematic configuration of a control unit for controlling a transport mechanism and a suction recovery mechanism of the recording apparatus of FIG.

FIG. 6 is a flowchart showing an example of an operation sequence of the recording apparatus to which the present invention has been applied.

FIG. 7 is a flowchart showing an operation sequence of a paper feed operation subroutine in FIG.

[Explanation of symbols]

 1 Cassette 2 Recording Material 3 Feeding Roller 8 Conveying Motor (Pulse Motor) 9 Conveying Roller 11 Discharging Roller 13 Suction Recovery Mechanism 17 Platen 18 Recording Means (Recording Head) 19 Carriage 20 Guide Rail 21 Discharging Tray 22 Cap 23 Tube 24 Pump 25 Transmission Means 26 Waste Ink Tank 27 CPU 28 RAM 29 ROM 30 Guide Roller 31 Pressure Roller 33 Supporting Stand 51 Discharge Port Forming Surface 52 Discharge Port 55 Electrothermal Converter

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B41J 29/38 Z 8804-2C

Claims (5)

[Claims] 1. In a recording apparatus for recording on a recording material by a recording means, a recording material conveying means and other operating means are driven by the same motor, and a predetermined operation for driving the other operating means is performed. A recording device, characterized in that the electric power supplied to the motor is increased at a timing. 2. The recording means is an ink jet recording means for ejecting ink to perform recording, and the other operating means is a pump for sucking ink from an ejection port of the recording means. Recording device. 3. The recording device according to claim 2, wherein the pump is a tube pump that presses a tube with a pressure roller, and increases the power supplied to the motor when the pressure roller presses the tube. apparatus. 4. The recording apparatus according to claim 1, wherein the recording unit is an inkjet recording unit including an electrothermal converter that generates thermal energy used for ejecting ink. 5. The recording apparatus according to claim 4, wherein the recording unit ejects the ink from the ejection port by utilizing film boiling generated in the ink by the thermal energy generated by the electrothermal converter.