JPH06278276A - Recording apparatus - Google Patents

Abstract

PURPOSE:To hasten the drying of ink and to increase a recording speed by providing an ink absorbing roller and a press roller on the downstream side of a recording part in pair and making the rollers synchronous to the feed roller on the upstream side of the recording part to feed recording paper. CONSTITUTION:A feed roller 14 and a first pressing roller 15 are arranged on the upstream side of a recording part 16 in pair and an ink absorbing roller 17 and a second pressing roller 18 are arranged on the downstream side of the recording part 16 in pair. The ink absorbing roller 17 is driven in synchronous relation to the feed roller 14 and the second pressing roller 18 is operated so as to be separated from the ink absorbing roller 17 for at least a definite time other than a feed time. By this constitution, the drying of ink is hastened and a recording speed can be increased and the stacking properties of recording paper can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording section of a facsimile machine, and more particularly to a recording apparatus of an ink jet system capable of quickly drying an ink liquid.

[0002]

2. Description of the Related Art Conventionally, various types of ink jet recording apparatuses have been proposed for ejecting a liquid to form droplets and adhering the droplets to paper or the like for recording. A shuttle type inkjet recording device that reciprocates to eject ink is often used. However, especially when ejecting ink, if the drying is slow, the recording paper is contaminated. Will be needed. As a conventional ink jet recording apparatus, (a) a blower duct for blowing hot air onto the recording paper surface so that the hot air blowing direction is parallel to the paper feeding direction in order to accelerate the drying of the ink without raising the temperature. (For example, JP-A-54-15
(See Japanese Patent No. 6536), (b) Ink is adhered in a state of being raised by surface tension, and in that state, the ink is heated from the back side of the paper to be heat-dried and fixed on the recording medium, thereby providing high-quality and clear recording. (For example, see Japanese Patent Application Laid-Open No. 62-288042), and (c) a case where a conveyance roller is provided before and after the recording unit to convey either one or both. And a method for controlling the carry amount so as to change the carry amount (see, for example, JP-A-4-14895).
(See Japanese Patent Laid-Open No. 8), (d) The upper portion of the ink absorbing member is held in a protruding state without being fixed, and only the cleaner is pulled out from the supporter by utilizing the protruding portion, and a new cleaner is attached. A recording device of a multi-nozzle head which has a small capacity of the ink absorbing portion and is excellent in replaceability can be obtained by simply replacing the recording medium by replacing the recording medium (for example, JP-A-4-717).
13), (e) air blown by a nozzle is collided and raised to support a plate material carried out from a conveyor as an air cushion (see, for example, Japanese Utility Model Laid-Open No. 4-107745). ) Etc.
In addition, as a reference example of the ink jet recording method, Japanese Patent Publication No. 4-64313 and Japanese Patent Publication No. 4-7269.
Japanese Patent Publication No. 7, Japanese Patent Publication No. 4-72698, Japanese Patent Publication No. 4-7
5822 or Japanese Examined Patent Publication No. 4-76786.

[0003]

As described above, it is proposed that the ink is dried quickly by heating or blowing air to increase the recording speed. For this purpose, a special heating device or A blower duct is required, and as a result, there is a problem that the device becomes complicated, large, and expensive. On the other hand, some facsimile machines have conventionally been provided with a memory to shorten the communication time, but even in this case, it is impossible to change the recording speed. Therefore, when the number of received sheets is large in the above facsimile apparatus, a large-capacity memory is required, and the cost increases accordingly. An object of the present invention is to solve such conventional problems, to have a small memory capacity, and to dry the ink without providing a large-scale heating device or a blower that makes the device complicated and large. An object of the present invention is to provide a recording device that can speed up recording as soon as possible.

[0004]

In order to achieve the above object, the recording apparatus of the present invention is (a) a shuttle type ink jet recording apparatus, in which a feed roller (14) is provided upstream of a recording section (16). ), The first pressing roller (15), and the ink sucking roller (17) on the downstream side of the recording unit (16).
And a pair of second pressing rollers (18) are arranged, and the ink suction roller (17) is driven in synchronization with the feed roller (14). Also, (b) second
The pressing roller (18) is also characterized in that it operates so as to be separated from the ink sucking roller (17) for at least a fixed time other than during transportation. Further, (c) a feed roller (14) and a first pressing roller (15) are provided upstream of the recording unit (16), and an ink absorbing roller (17) is provided downstream of the recording unit (16). It is also characterized in that each pair of the second presser rollers (18) is arranged, and a vane plate (26) which is mounted on the recording unit (16) and blows air behind the print position on the recorded recording paper is arranged. There is. Also, (d) blade (2
6) moves every time the recording unit (16) reciprocates,
The rear end of the blade plate (26) is brought into contact with the switching plates c and d provided on the upstream side and the downstream side, whereby the blade plate (2
It is also characterized by changing the direction of 6). Also,
(E) A heat source such as a power source (62) is arranged on the side opposite to the recording paper (10) recorded by the recording unit (16) with respect to the blade plate (26), and the air warmed by the heat source is supplied to the blade plate. (26)
It is also characterized in that the air is blown onto the recording paper (10). Further, (f) a feed roller (46), a first pressing roller (47), and a recording unit (52) upstream of the recording unit (52).
A pair of the ink sucking roller (48) and the second pressing roller (49) is arranged on the downstream side of the recording sheet (10), and the curl of the recording paper (10) is formed on the upstream side of the recording section (52). It is also characterized in that a curling portion (45) is provided so that the recording paper (10) can be conveyed by being attached so as not to come close to the recording portion (52). Further, the (g) curling portion (45) has a curl on only the front end portion, only the rear end portion, or both the front and rear end portions of the recording paper (10), and the middle portion is not curled. It is also characterized by having done.

[0005]

In the present invention, the ink liquid on the recording paper ejected from the ink jet type recording head is dried by the hot air blown by the blade of the simple mechanism.
Further, by providing a pair of an ink absorbing roller and a pressing roller on the downstream side of the recording section, the recording sheet is conveyed in synchronization with this roller on the upstream side of the recording section. Further, when both the roller pair on the upstream side and the roller pair on the downstream side of the recording section are still in contact with each other, a difference in the outer diameter of the roller causes a difference in the feed amount according to the paper feeding, and the recording paper pulls. Since uneven printing occurs due to the roller due to the sticking and the rubbing or slack on the paper surface, in order to prevent this, separate the press roller that opposes the suction roller for a certain period of time other than during transportation. To do so. Moreover, since the blade for drying the ink liquid is mounted on the carriage,
Each time the carriage moves, the rear ends of the blades come into contact with the switching plates on both sides to change the orientation of the blades. Then, in order to blow hot air onto the ink liquid recorded on the recording paper, a power source is installed behind the carriage, and the air warmed by the power source is blown by the blades. Furthermore, when the recording paper comes into close contact with the recording head, uneven printing occurs.To prevent this, a curling roller is provided to curl the recording paper, so that the recording paper does not stick to the head and the platen To be transported in close contact with. In a conventional inkjet printer, the ink is ejected to the stacker while floating on the surface of the recording paper, so if the next recording paper is ejected on top of it, it may become dirty due to friction or the ink may be transferred to the back surface. To do. In the present invention, the drying of the ink liquid can be accelerated by a simple mechanism, so that the recording paper is not soiled. Further, by speeding up the drying, the stacking property of the recording paper can be improved. Further, since the recording is performed by sticking the recording sheet to the guide plate by applying the wind to the rear end side of the recording sheet, the image quality is stabilized by stabilizing the distance between the head and the recording sheet. Further, by separating the pressing roller paired with the suction roller, the skew of the recording paper can be prevented.

[0006]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a side sectional structural view of a recording section showing an embodiment of the present invention. In FIG. 1, 10 is a recording paper, 1
Reference numerals 1 and 12 are guide plates, 13 is a leading edge detection sensor for detecting the leading edge of the recording paper, 14 is a feed roller that conveys the recording paper from bottom to top, 15 and 18 are pressing rollers, and 16 is recording. Reference numeral 27 is a head for ejecting an ink jet, 17 is a sucking roller for sucking the ink liquid of the recording paper conveyed from below to above, 19 is a guide for discharging the conveyed recording paper to a stacker, 20 is a stacker on which discharged discharged recording paper is placed, 21 is a carriage on which a head is mounted, 22 is a guide shaft, 23 is a pin, 24 is a spring, 25 is a fulcrum, and 26 is a blade plate for blowing air. Is. Recording paper 10 conveyed from the lower right direction
Is fed between the feed roller 14 and the press roller 15 by the guide plates 11 and 12, and the recording unit 16 above
Sent to. Therefore, a plurality of lines are recorded at once by the recording head (inkjet system) 27 mounted on the carriage 21, that is, the recording paper 10 is sequentially recorded in the main scanning direction (horizontal width direction). When the recording is performed in the main scanning direction, the recording paper 10 is conveyed by a plurality of lines, and the carriage 21 returns to the original position (home position) during this. In the same way, the next multiple lines will be recorded.

In this way, the recording paper 10 recorded by the recording unit 16 is recorded to the end while the excess ink is absorbed by the absorption roller 17, and then the absorption roller 17 and the pressing roller. It is discharged onto the stacker 20 at 18. In this embodiment, the case of unidirectional recording has been described, but in the case of reciprocal recording, the carriage 21 is not moved and only the paper is fed, and the next recording is performed in the opposite direction to the above case. become. Here, the relationship between the feeding roller 14 and the sucking roller 17 will be described. In terms of force, the feed roller 14 has a stronger feed force, and both rolls
If the roller pairs 14, 15 and 17, 18 remain in contact with each other, a difference in the feed amount occurs due to variations in the roller outer diameter as the paper is fed. Rubbing (friction) at 17 causes print stains, and slack causes print unevenness.

FIG. 2 is a view showing a mechanism for eliminating the problem caused by the variation of the roller outer diameter in FIG. In FIG. 2, 30 is a solenoid, 31 is a shaft of the press roller 18, 32 is a shaft of the feed roller 14, 33 is a lever connecting the press roller shaft 31 and the feed roller shaft 32, and 34.
Is a tension spring that pulls the lever 33 in one direction. In the present embodiment, as shown in FIG. 2, after the recording paper 10 is conveyed, the solenoid 30 is once attracted to the feeding roller.
The lever 33 is rotated to the right by using the shaft 32 as a fulcrum to suck the pressing roller 18 away from the roller 17 to eliminate the above-mentioned problem. Since the tension spring 34 is attached to the lever 33, if there is no suction of the solenoid 30, the lever 33 immediately returns to its original position and the pressing roller 18 comes into contact with the sucking roller 17. FIG. 3 is a diagram showing a gear relationship for the synchronous operation of both rollers in FIG. In FIG. 3, 35
Is a feed roller 14 gear, 36 and 37 are intermediate roller gears, and 38 is a sucking roller 17 gear. If the suction roller 17 and the feed roller 14 do not operate in synchronism with each other, the difference in the feed amount occurs as described above, which causes print stains due to friction and print unevenness due to slack. Therefore, in order to eliminate such problems,
As shown in FIG. 3, both rollers-14 and 17 are connected by a drive system (the motor is not shown here). As a result, the outer diameter of the feed roller 14 and the outer diameter of the suction roller 17 are also set so that they can be fed in substantially equal amounts according to the gear ratio.

FIG. 4 is a plan view of the blade plate in FIG. In FIG. 4, 10 is a recording paper, 26 is a blade,
Reference numeral 25 is a fulcrum for alternately moving the vane plate 26 in both up and down directions in the figure, 21 is a carriage that moves at every line change,
39 is a toggle spring which is a power for moving the blade plate 26,
C and D are switching plates located at both ends of the carriage 21 for moving and for switching the moving direction of the vane plate 26. FIG. 4 shows the direction of the wind and the operation of the blades 26 for drying the ink on the recording paper 10. When the carriage 21 moves in the C ′ direction, the blade plate 26 is positioned as shown by the solid line, and the carriage 2 in the C ′ direction is moved.
The movement of 1 causes the air to flow in the direction of the arrow, so that the wind hits the recording paper surface immediately after recording. As a result, the ink liquid remaining on the recording paper surface is almost dried. Carriage 21 is 1
When the recording is completed for the number of times, the carriage 21 has finished moving in the C ′ direction and the rear end of the blade plate 26 abuts against the switching plate C, so that the blade plate 26 is moved to the position shown by the alternate long and short dash line in the opposite direction by the toggle spring 39. Can be switched. And the carriage 21
Similarly, when returning to the original position, air is sent to the paper surface, so that the drying of the ink is promoted, and when returning to the original position, the switching plate D
And the vane plate 26 also returns to the original position (solid line). In this way, the ink liquid is dried by blowing air onto the recording paper surface while alternately switching the positions of the solid line and the alternate long and short dash line. The vane plate 26 is effective for both unidirectional printing and reciprocal printing.

FIG. 6 is a diagram showing positions where the recording sheet is blown by the blades in FIG. In FIG. 6, 10 is a recording paper, 55 is a range in which wind blows, 56 is a head moving direction (main scanning direction), 57 is a paper conveying direction (sub scanning direction), and 58.
Is the position currently being recorded. As shown in FIG. 6, when the surface of the recording paper is viewed, the wind blows behind the printing position (during recording), so that the flow of ink droplets in the printing portion is not disturbed and image quality can be maintained. . That is, the position of the recording head 58 moves in the direction of the arrow along the head moving direction 56, but the area 55 exposed to the wind moves behind the recording head 58, so that the ink droplets are effectively dried. When the printing of one line is completed, the recording paper 10 is conveyed in the sub-scanning direction (upward direction in the drawing), and accordingly, the position 58 during printing is line-fed for one line. At the time of recording, the recording paper 10 may be stretched by the upper and lower roller pairs 14, 15 and 17, 18, and the pressing roller 18 on the sucking roller 17 side may be released. The recording paper 10 may be pressed against the rear guide plate by the wind from the vane plate 26 to press the rear portion of the printing portion or to stabilize the position.

FIG. 5 is a side sectional structural view of a recording portion showing another embodiment of the present invention. 5 is different from the structure shown in FIG. 1 in that a curling roller is arranged between the recording paper feeding section and the feeding roller so that the recording paper does not come close to the recording head side. That is what I did. In FIG. 5, 40 is a recording paper table, 41 is a paper feed roller, 42 is a separation roller,
43 is a fulcrum, 44 is a leaf spring, 45 is a curling roller, 4
6 is a feed roller, 47 is a pressing roller, 51 is a recording paper front end, 52 is a head, 48 is a sucking roller, and 49 is a pressing roller. That is, as in the case of FIG. 1, if the recording paper is fed without a curl, the platen and the recording paper may get closer to the head depending on the contact position between the feed roller 46 and the pressing roller 47. A gap is generated between the two, which may cause a print position error, print unevenness, or the like. In FIG. 5, the recording paper table is
The recording paper 10 is curled by the curling roller 45 by inclining the bull 40 so as not to approach the head 52. In particular, since the leading and trailing edges of the recording paper 10 are unstable, it is possible to add a curl with the curling roller 45.
The recording paper 51 is moved along the guide plate so that printing unevenness such as a stable printing position and a change in size of printing dots does not occur. When the configuration of FIG. 5 is applied to FIG. 1, the leaf spring 44 is slightly rotated counterclockwise about the fulcrum 43 (by a solenoid (not shown) or the like) to be separated from the curling roller 45, and the tip and The recording position can be stabilized by giving a habit only to the rear end and not giving a habit to the middle part.

FIG. 7 is a side sectional view of a recording section of a facsimile apparatus showing an application example of the present invention. FIG. 7 shows a case where the recording unit of the present invention is mounted in a facsimile apparatus. By disposing the power source 62 behind the carriage (blade plate) 21, hot air drying is performed without using a special heat source. I can do it. In FIG. 7, 40 is a recording paper table, 41 is a paper feed roller, 42 is a separation roller, and 2 is a separation roller.
1 is a carriage, 60 is a stacker, and 61 is a main board.
, 62 is a power source, 64 is a document table, 65 is a separation roller, 66 is a paper feed roller, 67 is a contact sensor, 68 is an operation panel, 69 is a document flow, and 63 is a recording paper flow. ,
Reference numeral 70 is a facsimile apparatus main body. Recording paper table 4
The portion of the flow of recording paper from 0 to the stacker 60 is the recording portion of the receiving facsimile, and the portion of the flow of original from the original table 64 to the stacker 60 is the original transmitting portion of the transmitting facsimile. When recording on the recording paper, the blades on the carriage 21 send the air warmed by the power source 62 to the recording paper as hot air to dry the ink.
In FIG. 1, when the leading edge sensor 13 detects the trailing edge of the recording paper 10 and then feeds the paper at a constant step, the recording paper 10 exceeds the feed roller portion, but thereafter, the suction roll is sucked. -Transfer by la-17. Although the recording unit is horizontal in each drawing, it is needless to say that it can be applied in the vertical direction.

[0013]

As described above, according to the present invention,
Only by providing a suction roller and a blower having a simple structure, it is possible to accelerate the drying of ink and speed up recording. Further, by speeding up the drying, the stacking property of the recording paper can be improved. Further, the wind is applied to the trailing end side of the recording paper so that the recording paper is attached to the guide plate for recording, whereby the image quality can be stabilized. Further, by skewing the pressing roller of the suction roller, the skew of the recording paper can be prevented.

[Brief description of drawings]

FIG. 1 is a side sectional structural view of a recording unit showing an embodiment of the present invention.

FIG. 2 is a view showing a mechanism for separating a pressing roller from the suction roller in FIG.

FIG. 3 is a view showing a connection between a feed roller gear and a suction roller gear in FIG.

FIG. 4 is a top view showing the structure of the blade plate of FIG.

FIG. 5 is a side sectional structural view of a recording section showing another embodiment of the present invention.

6 is a plan view of the recording paper blown by the blades in FIG.

FIG. 7 is a side sectional view of a recording unit in a facsimile apparatus showing an application example of the present invention.

[Explanation of symbols]

 10 Recording Paper 11, 12, 19 Guide Plate 13 Tip Sensor 14 Feed Roller 17 Suction Roller 15, 18 Presser Roller 16 Recording Section 20 Stacker 21 Carriage 22 Guide Shaft 27 Head 26 Blade Plate 25 Blade Plate Support point 40 Recording paper table 41 Feeding roller 42 Separation roller 43 Support point 44 Leaf spring 45 Propensity roller 46 Feed roller 47, 49 Press roller 48 Suction roller 50 Guide plate 64 Paper feed table 66 Paper feed roller 65 Separation roller 68 Operation panel 70 Facsimile body

Claims (7)

[Claims] 1. In a shuttle type ink jet recording apparatus, a feed roller and a first pressing roller are provided upstream of a recording section, and an ink absorbing roller and a second pressing roller are provided downstream of the recording section. A recording apparatus, in which each of the pairs is arranged and the ink sucking roller is driven in synchronization with the feed roller. 2. The ink jet recording apparatus according to claim 1, wherein the second pressing roller is operated so as to be separated from the ink sucking roller for at least a certain period of time other than during transportation. Recording device. 3. A shuttle type ink jet recording apparatus, wherein a feed roller and a first pressing roller are provided upstream of the recording section, and an ink absorbing roller and a second roller are provided downstream of the recording section.
A recording apparatus, in which each pair of pressing rollers is disposed, and a blade plate mounted on the recording unit and for blowing air is disposed behind a printing position on a recording sheet on which recording is performed. 4. The recording apparatus according to claim 3, wherein the blade plate moves each time the recording unit reciprocates to change the direction of the blade plate. 5. The recording apparatus according to claim 3, wherein a heat source such as a power source is arranged on the side opposite to the recording paper on which the recording unit records with respect to the vane plate, and is heated by the heat source. A recording apparatus, wherein air is blown to the recording paper by the blade plate. 6. In a shuttle type ink jet recording apparatus, a feed roller and a first pressing roller are provided upstream of a recording section, and an ink absorbing roller and a second pressing roller are provided downstream of the recording section. A recording apparatus in which each pair of the above is arranged and a habit forming portion is provided on the upstream side of the recording portion. 7. The recording apparatus according to claim 6, wherein the prominence portion has only a front end portion and a rear end portion of the recording paper,
Alternatively, the recording apparatus is characterized in that both the leading end and the trailing end have a curl and the middle part does not have a curl.