JPH0885200A - Recording medium discharging device and recording device - Google Patents

Abstract

PURPOSE: To prevent scumming due to friction between recorded mediums, the disturbance of a recording picture and the like by a method wherein a guide member, guiding and retaining the recording medium at a position different from the pair of rotary bodies, is provided on the passing surface of the recording medium, passing through the pair of rotary bodies. CONSTITUTION: A projection 13a for guiding and retaining a recording sheet S, passing through the abutting point between the pair of discharging rollers 14, 15, is provided at a position at the most downstream side of a paper guide 13 and different from the abutting point. When the recorded sheet S has arrived at the pair of discharging rollers 14, 15, the sheet S is pinched between the pair of discharging rollers 14, 15 and the projection 13a is abutted against the rear side of the recording sheet whereby the recording sheet S is retained under the condition that the sheet is not held in a plane. In the recording sheet S, discharged and transferred under this condition, a force against a bending force into a vertical direction due to the gravity of the sheet i.s increased at the downstream side of the sheet transferring direction of the abutting points of the discharging rollers 14, 15 whereby a distance until the ti,p end of the recording sheet S is drooped is extended and a time until the discharging recording sheet S is contacted with the surface of the discharged recording sheet is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device for recording on a recording medium, for example, as a recording device such as a printer as an upper output device such as a computer or a recording system in an image forming apparatus such as a copying machine or a facsimile. Recording device.

[0002]

2. Description of the Related Art Conventionally, a so-called serial type recording apparatus for performing recording by scanning a recording head and a recording sheet respectively in the main scanning direction and the sub scanning direction has a structure as shown in FIG. FIG. 15 is a lateral cross-sectional view of the device as seen from the main scanning direction.

The operation of the recording apparatus shown in FIG. 15 is such that, when a recording signal is received from the host computer, an LF motor (not shown) is driven to rotate the paper feed roller 101, thereby feeding the stacker.
The recording sheets S on the sheet 102 are picked up one by one and sent to the pair of conveying rollers 103. Then, the conveying roller pair 10
The recording sheet S is conveyed and set to a recordable position by 3. Next, a CR motor (not shown) is driven to reciprocate the carriage 105 carrying the recording head 104 in the main scanning direction, and the recording data is recorded on the recording sheet S by the recording head 104. When the recording data for one line is completed, the recording sheet S is conveyed by a predetermined amount in the sub-scanning direction, and the carriage 105 is returned to the home position.
The above recording operation is performed by the photo sensor 106 on the recording sheet S.
Repeat until the trailing edge is detected. When a paper discharge command is issued from the host computer on the way, the recording sheet S is discharged to the paper discharge stacker 108 by the paper discharge roller pair 107.

When the trailing edge of the recording sheet S is detected by the sensor 106, the same operation as the above recording operation is repeated until the detected sheet conveyance amount exceeds a preset amount. When the carry amount is equal to or exceeds the set amount, the recording sheet S is discharged to the discharge stacker 108 by the discharge roller pair 107. Next, by checking whether or not the received data from the host computer is still present, if the received data is present, the above operation is repeated to record on the next recording sheet, and if the received data is not present, the recording operation is performed. finish.

[0005]

However, in the recording apparatus of the above-mentioned conventional example, the recording sheet S discharged and conveyed by the discharge roller pair 107 is discharged when the portion discharged from the discharge roller pair 107 increases. The suspended portion hangs down by its own weight, and is discharged and conveyed while rubbing on the surface (recording surface) of the previously discharged recording sheet S. At this time, if the previously ejected ink on the recording sheet (recording surface) is not dried due to environmental conditions or the like, there is a risk that the above-mentioned rubbing may cause stains on the ink or disorder of the recorded image.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent ink stains and disorder of recorded images due to rubbing between recorded recording media.

[0007]

A typical configuration of the present invention for achieving the above object is a recording medium ejecting apparatus having a pair of rotating members for ejecting and conveying a recorded recording medium to a stacking unit. A guide member for guiding and supporting the recording medium is provided at a position different from the pressure contact of the rotating body pair on the passage surface of the recording medium passing through the rotating body pair.

[0008]

In the above-mentioned structure, by providing the guide member for guiding and supporting the recording medium at a position different from the pressure contact of the rotating body pair on the passage surface of the recording medium passing through the rotating body pair, the ejection is performed. It is possible to prevent the surface of the previously-dried undried recording medium from being rubbed by the leading edge of the recording medium.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording apparatus to which the present invention is applied will be specifically described below with reference to the drawings.

[First Embodiment] A first embodiment of the recording apparatus according to the present invention will be described with reference to the drawings. 1 to 4
Is a schematic explanatory view of the vicinity of the discharge roller pair in the recording apparatus, FIG. 5 is a side sectional view showing the schematic configuration of the recording apparatus, and FIGS.
8 is a schematic configuration diagram of a drive transmission mechanism of a sheet conveying system, FIG. 8 is a schematic configuration diagram of a control system of a recording apparatus, FIG. 9 is a flowchart showing an operation flow in a recording mode, and FIG. 10 is a flowchart showing a recording operation flow. Is. In the present embodiment, a serial type recording apparatus that conveys a recording medium in the sub-scanning direction and scans the recording unit in the main scanning direction to perform recording will be described.

FIG. 5 is a schematic sectional view showing an example of a schematic configuration of a serial type recording apparatus according to the present invention. In FIG. 5, reference numeral 1 is a recording head as recording means, and in this embodiment, an ink jet recording method for ejecting ink for recording is adopted. That is, this recording head has a fine liquid discharge port (orifice), a liquid passage and an energy acting portion provided in a part of this liquid passage, and an energy generating means for generating a droplet forming energy that acts on the liquid in the acting portion. And so on.

As the energy generating means for generating such energy, a recording method using an electromechanical transducer such as a piezo element, electromagnetic waves such as a laser are irradiated to generate heat, and droplets are ejected by the action of the heat generation. There are a recording method using an energy generating means, a recording method using an energy generating means that heats a liquid by an electrothermal converter such as a heating element having a heating resistor, and ejects the liquid.

Among them, a recording head used in an ink jet recording method for ejecting a liquid by thermal energy has a high density of liquid ejection ports (orifices) for ejecting recording liquid droplets to form ejection liquid droplets. Since they can be arranged, high resolution recording is possible. Among them, the recording head using the electrothermal converter as the energy generating means can easily be made compact, and has the advantages of the IC technology and the microfabrication technology, which have been remarkably improved in technology and reliability in the recent semiconductor field. This is advantageous because it can be used in two parts, high-density mounting is easy, and the manufacturing cost is low.

Reference numeral 2 is a carriage on which the recording head 1 is detachably mounted. This carriage 2
Is the direction orthogonal to the sheet conveying direction (main scanning direction)
It is slidably supported by columnar carriage shafts 3 and 4 which are erected on. Further, a carriage belt 6 stretched in the main scanning direction by a pulley connected to a driving means (not shown) and a tension pulley 5 is engaged with a part of the carriage 2. Therefore, the carriage belt 6 is rotationally driven by driving the driving means (not shown), and the carriage 2 carrying the recording head 1 reciprocally scans along the carriage shafts 3 and 4 in the main scanning direction.

Reference numeral 7 denotes a half-moon-shaped feed roller which picks up and feeds the recording sheets S on the feed stacker 8 one by one during the feeding operation. The feeding stacker 8
Is provided with a pressure plate 8a on which the recording sheets S are stacked. The pressure plate 5a is biased upward from the back side by a pressure plate spring 8b, and when the feeding roller 7 rotates, the uppermost recording sheet S is pressed. Is configured to abut.

A conveying roller 9 is rotationally driven by a driving means (not shown) and holds the recording sheet S and conveys it in the sub-scanning direction. Reference numeral 10 denotes a pinch roller, which presses the recording sheet S against the conveying roller 9 to generate a conveying force. The pinch roller 10 is rotatably held by the roller holder 11, and the roller spring 12
The roller holder 11 is biased by and is pressed against the transport roller 9.

Reference numeral 13 denotes a paper guide (platen plate) as a supporting means for determining a position (recording section: sheet processing section) for performing print recording on the recording sheet S by the recording head 1. The recording head 1 has this paper guide surface. They are facing each other with a small gap.

Reference numeral 14 denotes a discharge roller which is rotationally driven by a driving means (not shown), and discharges and conveys the recorded recording sheet S from the recording position. Reference numeral 15 is a spur which presses the recording sheet S against the discharge roller 14 to generate a conveying force. The configuration of the discharge roller pairs 14 and 15 and the vicinity thereof will be described later.

A sheet sensor 16 as a detecting means detects the front and rear edges of the recording sheet S. The sheet sensor 16 is arranged on the upstream side of the pressure contact between the conveying roller 9 and the pinch roller 10 in the sheet conveying direction. In this embodiment, a reflection type photo sensor is used as the sensor.

Reference numeral 17 denotes a discharge stacker for stacking and holding the recording sheets S discharged by the discharge roller 14 and the spur 15, and is arranged below the pressure contact point of the discharge roller 14 and the spur 15.

Now, the structure in the vicinity of the discharge roller pair 14 and 15 will be described in detail. As shown in FIGS. 1 to 3, in the vicinity of the pressure contact points of the discharge roller pairs 14 and 15, the discharge roller pair is provided on the most downstream side of the paper guide 13.
A projection 13a for guiding and supporting the sheet S at a position different from the pressure contact is provided for the recording sheet S passing through the pressure contacts 14 and 15. The protrusion 13a is formed so as to protrude toward the recording head side with respect to the sheet passing surface formed by the pair of discharge rollers 14 and 15. Therefore, the recording sheet S on which the recording is performed is
When it reaches 14 and 15, it is sandwiched by the roller pair 14 and 15, and the projection 13a comes into contact with the back surface side of the sheet (the side opposite to the recording surface), and as shown in FIG.
It is held in a non-planar state (curved state) at and around the 15 pressure contacts.

The recording sheet S, which is discharged and conveyed while being held in the above state, is subjected to a bending force (gravity) in the vertical direction due to its own weight, on the downstream side of the pressure contact of the discharge rollers 14 and 15 in the sheet conveying direction. Since the drag is improved (the waist becomes stronger), the distance Ld until the leading edge of the sheet hangs can be extended as shown in FIG. As a result, the recording sheet S discharged by the pair of discharging rollers 14 and 15 is the surface (recording surface) of the recording sheet S that has been discharged first.
Since the time until the ink comes into contact with the sheet S increases, it takes a sufficient time for the ink on the recording surface of the sheet S to dry, thereby preventing the occurrence of ink stains and the disturbance of the recorded image, which have been conventionally seen. It becomes possible.

Next, the schematic structure of the drive transmission mechanism of the sheet conveying system will be described with reference to FIGS. 6 and 7. In the figure, 21 is a transport roller gear provided on the roller shaft of the transport roller 9, 22 is a planet gear having the transport roller gear 21 as a sun gear, 23 is a lever for rotatably holding the planet gear 22, and 24 is a A discharge roller gear provided on the roller shaft of the discharge roller 14, 25 is a motor gear provided on the motor shaft of an LF motor (not shown), and 26 is a feed roller gear provided on the roller shaft of the feed roller 7. . 27 is an idle gear that connects the transport roller gear 21 and the discharge roller gear 24 to the motor gear 25, and 28, 29, and 30 are idle gears that connect the planetary gear 22 and the feed roller gear 26 that use the transport roller gear 21 as a sun gear. It is a gear.

Normally, the sheet conveying operation during recording is
Since the lever 23 is held in the state shown in FIG. 6 by a solenoid or the like, the driving force of the LF motor (not shown) (in the direction of the broken arrow shown in FIG. 6) is transmitted only to the transport roller gear 21 and the discharge roller gear 24. It During the sheet feeding operation, as shown in FIG. 7, the holding of the lever 23 is released, so that the driving force of the LF motor (in the direction of the solid line arrow in FIG. 7) causes the lever 23 to convey the conveyance roller gear 21. , And is transmitted to the feeding roller gear 26 via the idle gears 28, 29, 30.

Next, the structure of the control system of the recording apparatus will be described with reference to FIG. In FIG. 8, reference numeral 31 is a microprocessor type CPU, and a ROM 32, which will be described later,
The program and various data are read from the RAM 33 and the like, necessary calculations and determinations are performed, and various control signals are output according to the control program to control the drive of the entire apparatus. The ROM 32 is a program memory and includes the CPU
It stores various programs and various data for the 31 to operate. The RAM 33 is a buffer memory and includes a working area for temporarily storing the data in the CPU 31 and an operation result, a text area for storing various data, and the like. Reference numeral 34 denotes a timer, which counts time based on an instruction signal from the CPU 31 and outputs time information.

The CPU 31 is an interface (I /
F) is connected to the host computer 36 via 35, and controls the recording operation based on the recording data from the host computer 36 stored in the ROM 32 or the RAM 33. Further, the CPU 31 controls the CR motor 39 and the LF motor 40 via the motor drivers 37 and 38, and controls the recording head 1 via the head driver 41 based on the recording information stored in the RAM 33. 42
Is an operation panel for setting a recording state such as a recording mode, on the basis of which a user can confirm the recording state of the recording apparatus. Further, 16 is a sheet sensor for detecting the leading edge and the trailing edge of the recording sheet S as described above.

Next, the control operation of the recording apparatus in the recording mode by the above control system will be described. FIG. 9 is a flow chart showing the flow of operations in the recording mode, and FIG. 10 is a flow chart showing the flow of recording operations. In the figure, when a recording signal is received from the host computer, the LF motor 40
Is driven to rotate the feeding roller 7, and the recording sheets S on the feeding stacker 8 are picked up one by one and fed to the pair of feeding rollers 9 and 10. When the recording sheet S is conveyed to a recordable position by the pair of conveying rollers 9 and 10 (S160
1) The received data is stored in the line buffer after being expanded as recording data (S1602). Next, the CR motor 39 is driven to scan the carriage 2 in the main scanning direction, and the recording head 1
Thus, the print data on the line buffer is printed on the print sheet S (S1701 to S1703). When the recording of the recording data on the line buffer is completed, the recording sheet S is moved by a predetermined amount L.
It is conveyed by n in the sub-scanning direction (S1704), and the carriage 2 carrying the recording head 1 is returned to the home position (main scanning start position) (S1705). The operations of S1602 to S1603 are repeated until the sensor 16 detects the trailing edge of the recording sheet S. If there is a discharge command from the host computer on the way, the process proceeds to the discharge process of the recording sheet in S1612 (S1604). When the trailing edge of the recording sheet S is detected by the sensor 16 (S1605), the sheet conveyance amount L after detection exceeds a preset amount L2 from S1602.
The same operation as S1604 is repeated (S1608 to S161).
1). When the carry amount L is equal to or exceeds the set amount L2, the recording sheet discharging process of S1612 is started (S1612).
1607). Next, it is checked whether or not the received data from the host computer is still present (S1613). If the received data is present, the process returns to S1601 to repeat the above-mentioned operation to record on the next recording sheet. If there is not, the recording operation ends.

[Second Embodiment] A second embodiment of the recording apparatus according to the present invention will be described with reference to the drawings. 11 is a side sectional view showing a schematic configuration of the recording apparatus, FIG. 12 is a schematic explanatory view of a discharge roller pair and its vicinity in the recording apparatus, FIG. 13 is a schematic configuration diagram of a drive transmission mechanism of a sheet conveying system, and FIG. 14 is a diagram of the recording apparatus. It is a side sectional view showing a schematic structure. In the present embodiment, a serial type recording apparatus that conveys a recording medium in the sub-scanning direction and scans the recording unit in the main scanning direction to perform recording will be described. Further, members having substantially the same functions and configurations as those of the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, as shown in FIG. 11, intermediate roller pairs 18 and 19 as recording medium holding means are provided between the recording position of the recording head 1 and the discharge roller pairs 14 and 15. The intermediate roller pair is composed of an intermediate roller 18 which is rotationally driven by a driving means (not shown), and a spur 19 which is pressed against the intermediate roller 18 and is driven to rotate. The intermediate roller pair
18 and 19 are arranged at positions where the recording sheet S can be held near the paper guide 13 at the recording position. The discharge roller pairs 14 and 15 are arranged such that the sheet passing surface of the intermediate roller pair 18 and 19 is inclined upward toward the downstream side in the sheet conveying direction. That is, the sheet passage surface is inclined toward the recording head side with respect to the sheet passage surface at the recording position, and further inclined toward the downstream side with respect to the sheet stacking surface of the discharge stacker 17 in the sheet conveying direction. Has been done.

Further, similar to the above-mentioned embodiment, in the vicinity of the pressure contact of the discharge roller pair 14 and 15, the pressure contact of the discharge roller pair 14 and 15 is passed to the most downstream side of the paper guide 13. A projection 13a for guiding and supporting the sheet S at a position different from the pressure contact with respect to the recording sheet S
Is provided. Similar to the above-described embodiment, the projection 13a is also formed so as to project toward the recording head side with respect to the sheet passing surface formed by the pair of discharge rollers 14 and 15.

Further, as shown in FIG. 13, the drive transmission mechanism of the sheet conveying system of the recording apparatus in the present embodiment, as shown in FIG. 13, is a conveying roller gear 21 provided on the roller shaft of the conveying roller 9, and the conveying roller gear 21 is a sun gear. A planetary gear 22, a lever 23 that rotatably holds the planetary gear 22, and a discharge roller 14.
The discharge roller gear 24 provided on the roller shaft of the above, the motor gear 25 provided on the motor shaft of the LF motor (not shown), and the feeding roller gear 2 provided on the roller shaft of the feeding roller 7.
6, an intermediate roller gear 43 provided on the roller shaft of the intermediate roller 18, an idle gear 44 connecting the transport roller gear 21 and the intermediate roller gear 43 to the motor gear 25, an idle gear 45 connecting the intermediate roller gear 43 and the discharge roller gear 24,
It comprises a planetary gear 22 having the carrier roller gear 21 as a sun gear and idle gears 28, 29, 30 connecting a feeding roller gear 26.

With the above-described structure, as in the above-described embodiment, the recording sheet S on which the recording has been performed has the discharge roller pair 14,
When it reaches 15, it is sandwiched between the pair of rollers 14 and 15, and the projection 13a comes into contact with the back surface side of the sheet (the side opposite to the recording surface), and at the pressure contact point of the pair of rollers 14 and 15 and in the vicinity thereof, It is held in a non-planar state (curved state) (see FIG. 4). The recording sheet S that is discharged and conveyed while being held in this state has improved resistance to the bending force (gravity) in the vertical direction due to its own weight, on the downstream side of the pressure contact point of the discharge rollers 14 and 15 in the sheet conveying direction. Therefore, as shown in FIG. 14, it is possible to extend the distance Ld until the leading end of the sheet hangs down. Furthermore,
The sheet passing surface from the intermediate roller pair 18, 19 to the discharging roller pair 14, 15 is on the recording head side with respect to the sheet passing surface at the recording position, and further on the downstream side in the sheet conveying direction with respect to the sheet stacking surface of the discharging stacker 17. The distance Ld is further increased so that the distance Ld until the leading edge of the sheet hangs can be further extended.

As a result, the time until the recording sheet S discharged by the pair of discharging rollers 14 and 15 comes into contact with the surface (recording surface) of the previously discharged recording sheet S increases. It takes a sufficient time for the ink on the recording surface to dry, and it is possible to prevent the occurrence of the ink stains and the disorder of the recorded image, which have been conventionally seen.
Further, since the intermediate roller pair 18 and 19 is provided between the recording position and the discharge roller pair 14 and 15, the sheet is prevented from floating at the recording position and the distance between the recording head 1 and the recording sheet S is kept constant. Therefore, it is possible to obtain high quality recording results.

In this embodiment, an intermediate roller pair consisting of an intermediate roller and a spur is used as the recording medium holding means, but the present invention is not limited to this, and a guide member or the like may be used.

[Other Embodiments] In the above-described embodiments, the ink jet recording system is used as the recording means. However, the electrothermal converter is energized according to a recording signal, and the thermal energy applied by the electrothermal converter is used. It is more preferable that the recording is performed by ejecting the ink from the ejection port due to the growth and contraction of the bubbles generated in the ink by utilizing the film boiling generated in the ink.

With regard to its typical structure and principle, it is preferable to use the basic principle disclosed in, for example, US Pat. Nos. 4,723,129 and 4740796. This method can be applied to both the so-called on-demand type and continuous type, but in the case of the on-demand type in particular, it is arranged corresponding to the sheet or liquid path holding the liquid (ink). By applying at least one drive signal to the electrothermal transducer, which corresponds to the recorded information and gives a rapid temperature rise beyond nucleate boiling,
This is effective because heat energy is generated in the electrothermal converter to cause film boiling on the heat acting surface of the recording head, and as a result bubbles in the liquid can be formed in a one-to-one correspondence with this drive signal. Due to the growth and contraction of the bubbles, the liquid 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 particularly excellent liquid ejection can be achieved.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise of the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge 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. The present invention also includes configurations using US Pat. Nos. 4,558,333 and 4,459,600, which disclose configurations in which the heat acting portion is arranged in a bending region.

Further, JP-A-59-123670, which discloses a structure 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 are disclosed. Japanese Patent Laid-Open Publication No.
The effect of the present invention is effective even if the configuration is based on Japanese Patent Laid-Open No. 59-138461. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Further, 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 medium which can be recorded by the recording apparatus. As such a recording head, a combination of a plurality of recording heads may be used to satisfy the length thereof or a single recording head integrally formed.

In addition, even in the case of the serial type described above, when the recording head is fixed to the carriage or mounted on the carriage, it is possible to electrically connect to the apparatus main body and supply ink from the apparatus main body. A replaceable chip type recording head may be used.

Further, it is preferable to add a recovery means for the recording head, a preliminary auxiliary means, etc., which are provided as a constitution of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specific examples thereof are capping means, cleaning means, pressurizing or suctioning means for the recording head, electrothermal converter or a heating element other than this, or preheating means by a combination thereof, and recording. It is also effective to perform a stable recording by performing a preliminary discharge mode in which another discharge is performed.

Regarding the type and number of recording heads mounted on the carriage, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. And a plurality of them may be provided. 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 the recording head may be integrally configured or a plurality of combinations may be used. Alternatively, it can be applied to an apparatus provided with at least one of full colors by color mixing.

In addition, although the ink is described as a liquid in the above-described embodiments, it is an ink that solidifies at room temperature or lower and softens or liquefies at room temperature, or in the ink jet recording system. 30 inks
Generally, the temperature is controlled in the range of ℃ to 70 ℃ to control the temperature of the ink so that the viscosity of the ink is within the stable ejection range. good. In addition, it is possible to prevent the temperature rise due to thermal energy from being positively used as the energy for changing the state of the ink from the solid state to the liquid state, or to use ink that solidifies when left standing for the purpose of preventing ink evaporation. In any case, heat such as ink that is liquefied by the application of heat energy according to the recording signal and liquid ink is ejected or that has already started to solidify when it reaches the recording sheet. It is also applicable when using an ink that has the property of being liquefied only by energy.

The ink in such a case is disclosed in JP-A-54-568.
As disclosed in Japanese Patent Publication No. 47 or Japanese Patent Laid-Open Publication No. 60-71260, a form in which the electrothermal converter is opposed to the concave portion or the through hole held in the liquid sheet as a liquid or solid substance. Also good. The most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

Further, as the form of the above-mentioned ink jet recording apparatus, in addition to a form used as an image output terminal of an information processing equipment such as a computer, a form of a copying machine combined with a reader or the like, and a form of a facsimile machine having a transmission / reception function. It may be something to take.

Further, in the above-mentioned embodiment, the example in which the ink jet recording system is used as the recording means has been described, but the recording system of the present invention does not need to be limited to the ink jet recording system, and other thermal transfer recording system or heat sensitive recording system. A recording method, a recording method such as a wire dot recording method, or any other recording method can be applied. Further, it is not necessary to limit to the serial recording method, and a so-called line recording method may be used.

[0048]

As described above, in the passage surface of the recording medium passing through the rotating body pair of the ejecting means, at a position different from the pressure contact of the rotating body pair, more specifically, in the direction perpendicular to the passing surface. A guide member for guiding and supporting the recording medium at a position protruding toward the recording means and abutting on the surface opposite to the recording surface with respect to the recording medium is provided. Since the recording medium is discharged and conveyed while being held in a curved state by the guide member, the resistance (rigidity) of the recording medium with respect to the bending force due to its own weight is improved, and the recording medium is contacted with the recording surface of the previously discharged recording medium. That is, the time until the ink on the recording surface dries can be sufficiently increased, and ink stains and disorder of the recorded image due to rubbing between recording media can be prevented.

Further, since the guide member is provided in the supporting means for guiding and supporting the recording medium in the vicinity of the recording position, the cost increase due to the increase in the number of parts is prevented.

Recording medium holding means for holding the passage surface of the recording medium in the vicinity of the supporting means on the downstream side of the recording position in the recording medium conveying direction and on the upstream side of the pair of rotating members of the discharging means, For example, by providing a pair of rotating bodies for sandwiching and conveying the recording medium, it is possible to prevent the recording medium from floating at the recording position, and to keep the distance between the recording unit and the recording medium constant, which results in high quality. The recording result can be obtained.

Further, the recording medium passing surface from the recording medium holding means to the pair of rotating members of the ejecting means is constructed so as to be inclined upward toward the downstream side in the recording medium conveying direction. The above-mentioned effect is obtained by arranging the surface toward the recording means side with respect to the recording medium passing surface at the recording position and further toward the recording medium stacking surface of the stacking means so as to become more distant toward the downstream side in the recording medium transport direction. Is further improved.

Further, by adopting the ink jet system as the recording means, low noise and high speed recording are possible, and high quality recording is possible. In this case, by providing an electrothermal converter for generating thermal energy as ink ejection energy, the head can be easily made compact and the manufacturing cost can be reduced.
Further, by ejecting the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy at the time of ejecting the ink, it is possible to obtain an effect that a high-definition image can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of the vicinity of a discharge roller pair according to a first embodiment of the present invention.

FIG. 2 is a schematic explanatory view of the vicinity of a discharge roller pair according to the first exemplary embodiment of the present invention.

FIG. 3 is a schematic explanatory view of the vicinity of a discharge roller pair according to the first exemplary embodiment of the present invention.

FIG. 4 is a schematic explanatory view of the vicinity of a discharge roller pair according to the first embodiment of the present invention.

FIG. 5 is a side sectional view showing a schematic configuration of a recording apparatus.

FIG. 6 is a schematic configuration diagram of a drive mechanism of a sheet conveying system.

FIG. 7 is a schematic configuration diagram of a drive transmission mechanism of a sheet conveying system.

FIG. 8 is a schematic configuration diagram of a control system of the recording apparatus.

FIG. 9 is a flowchart showing a flow of operations in a recording mode.

FIG. 10 is a flowchart showing the flow of a recording operation.

FIG. 11 is a side sectional view showing a schematic configuration of a recording apparatus according to a second embodiment of the invention.

FIG. 12 is a schematic explanatory view of the vicinity of a pair of discharge rollers according to the second embodiment of the present invention.

FIG. 13 is a schematic configuration diagram of a drive transmission mechanism of a sheet conveying system.

FIG. 14 is a side sectional view showing a schematic configuration of a recording apparatus according to a second embodiment of the invention.

FIG. 15 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

S ... Recording sheet 1 ... Recording head 2 ... Carriage 3, 4 ... Carriage shaft 5 ... Tension pulley 6 ... Carriage belt 7 ... Feeding roller 8 ... Feeding stacker 8a ... Pressure plate 8b ... Pressure plate spring 9 ... Conveying roller 10 ... Pinch roller 11 ... Roller holder 12 ... Roller spring 13 ... Paper guide (platen plate) 13a ... Projection 14 ... Ejection roller 15 ... Spur 16 ... Sheet sensor 17 ... Ejection stacker 18 ... Intermediate roller 19 ... Spur 21 ... Conveyor roller gear 22 ... Planetary gear 23 ... Lever 24 ... Ejection roller gear 25 ... Motor gear 26 ... Feed roller gear 27, 28, 29, 30 ... Idle gear 31 ... CPU 32 ... ROM 33 ... RAM 34 ... Timer 35 ... Interface (I / F) 36 ... Host computer 37, 38 … Motor driver 39… CR motor 40… LF motor 41… Head driver 42… Operation panel 43… Intermediate roller gear 44, 45… Eye Lugia

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65H 29/52

Claims (15)

[Claims] 1. A recording medium ejecting apparatus having a pair of rotating bodies for ejecting and conveying a recorded recording medium to a stacking unit, wherein a pressure contact of the pair of rotating bodies is provided on a passage surface of the recording medium passing through the pair of rotating bodies. A recording medium ejecting apparatus comprising a guide member for guiding and supporting the recording medium at a position different from that of 2. The guide member projects toward the recording means in a direction perpendicular to a passage surface of a recording medium passing through the pair of rotating bodies, and abuts a surface of the recording medium opposite to the recording surface. The recording medium ejection device according to claim 1, wherein the recording medium ejection device is in contact with the recording medium ejection device. 3. The recording medium ejecting apparatus according to claim 1, wherein the guide member is provided in a supporting unit that guides and supports the recording medium in the vicinity of the recording position. 4. The recording medium holding means for holding the passage surface of the recording medium in the vicinity of a supporting means for guiding and supporting the recording medium in the vicinity of the recording position. Recording medium ejecting device. 5. The recording medium ejecting apparatus according to claim 4, wherein the recording medium holding means is a pair of rotating bodies that nip and convey the recording medium. 6. The recording according to claim 4, wherein the recording medium passing surface from the recording medium holding means to the pair of rotating bodies is inclined upward toward the downstream side in the recording medium conveying direction. Media ejector. 7. A recording unit for recording on a recording medium, a recording position for recording on the recording medium by the recording unit and a supporting unit for guiding and supporting the recording medium in the vicinity of the recording position, and a recording medium on which recording is performed. A discharge means having a pair of rotating bodies for discharging and carrying, and a stacking means for stacking the discharged recording medium, and a pressure contact of the rotating body pair on the passage surface of the recording medium passing through the rotating body pair. A recording apparatus, wherein guide members for guiding and supporting the recording medium at different positions are provided. 8. The guide member projects toward the recording means in a direction perpendicular to a passage surface of a recording medium passing through the pair of rotating bodies, and abuts a surface opposite to the recording surface with respect to the recording medium. The recording apparatus according to claim 7, which is in contact with each other. 9. The recording apparatus according to claim 7, wherein the guide member is provided on a support unit that guides and supports the recording medium at the recording position and in the vicinity of the recording position. 10. The recording medium holding means for holding the passage surface of the recording medium in the vicinity of the recording position and a supporting means for guiding and supporting the recording medium in the vicinity of the recording position. Item 7. The recording device according to item 7. 11. The recording medium holding means is a pair of rotating bodies that nip and convey the recording medium.
The recording device according to 0. 12. The recording medium passage surface from the recording medium holding means to the pair of rotating bodies is inclined upward toward the downstream side in the recording medium conveying direction.
The recording device according to 0. 13. The recording apparatus according to claim 7, wherein the recording apparatus is an inkjet recording system in which a recording unit ejects ink in accordance with a signal to perform recording. 14. The recording device according to claim 13, wherein the recording device includes an electrothermal converter for generating thermal energy for ink ejection by the recording means. 15. The recording apparatus according to claim 14, wherein the recording means ejects the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy applied by the electrothermal converter. The recording device according to 1.