JPH06262759A - Recorder - Google Patents

Abstract

PURPOSE:To enable recording to be carried out even on a back surface just after recording on a front surface of recording paper by a method wherein recording quality of a character or an image is prevented from deteriorating by drying ink after recording in an atmosphere at high temperature. CONSTITUTION:A paper feed part 4, and the first carrying means 5 which can carry recording paper fed from a paper feed part into a recording part and discharge it from the recording part are provided to one side of the recording part which records on the recording paper with a recording head 1. The second carrying means 6 which can discharge the recording paper recorded on a front surface from the recording part and can carry it into the recording part, and a guide means 7 which guides a back surface of the recording paper in the second carrying means are provided to the other side of the recording part. Then, the recording paper is carried from the other side of the recording part into the recording part, and a character or an image recorded on the back surface is recorded with the recording head and discharged to one side of the recording part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a recording device such as a printer, and more particularly, it is possible to rapidly perform double-sided recording by quickly drying the ink printed on the recording paper by an inkjet image recording device or the like. Recording device.

[0002]

2. Description of the Related Art An ink jet recording apparatus forms an image on a recording paper by ejecting ink droplets from nozzles of an ink head having a fine ink flow path. Some have a double-sided recording mode in which after printing is performed on one side of the paper, printing is also continuously performed on the back side. In double-sided recording, if you print on the back side without waiting for the ink on one side to dry,
Since the ink on the one surface is rubbed by the platen roller and the image quality is deteriorated, various methods for drying the ink have been conventionally proposed. That is, JP-A-62-286
Japanese Patent Laid-Open No. 772 discloses a method of drying ink after printing in an inkjet recording apparatus or the like by winding a heater of a heating device around a platen roller and covering the platen roller with a surface member. However, embedding the heater or the like of the heating device in the platen roller in this manner is a problem because the manufacturing cost and the like are relatively high. Also, in order to dry the ink after printing, hot air is blown onto the recording paper (Japanese Patent Laid-Open No. 54-156536), or the recording medium before and after recording is preheated from the front side or the back side or both sides by the above method and heat source lamp Alternatively, it is heated (JP-A-62-288).
No. 042 gazette) method has been proposed, but the recording paper and the ink before and after printing can be dried, but the drying is insufficient. In both cases, the drying is performed immediately after printing on the surface of the recording paper. It was impossible to print on the back side of the recording paper.

[0003]

As described above, in the conventional ink jet recording apparatus, the ink after printing in ink jet recording or the like is dried in an open state, and the recording quality of characters and images is deteriorated. With such an apparatus and method, it was not possible to perform recording on the back surface of the recording paper after drying immediately after recording on the front surface of the recording paper.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention is to solve such a problem. That is, by drying the ink after recording in ink jet recording or the like in a high temperature atmosphere, deterioration of the recording quality of characters and images is prevented, and the back surface of the recording paper is dried immediately after recording on the front surface of the recording paper. It is also an object of the present invention to provide a recording device capable of recording.

[0005]

In order to achieve the above object, the present invention is a recording apparatus for recording on a recording sheet which is conveyed in the sub-scanning direction by a recording section having a recording head. On the upstream side in the forward direction, there are arranged a paper feed section and a first transport means capable of carrying in and ejecting recording paper fed from the paper feed section to the recording section. On the downstream side in the direction, there is provided a second conveying means capable of ejecting the recording paper recorded on the front side from the recording section and being conveyed backward to the recording section, and a guide for guiding the back side of the recording sheet in the second conveying means. Means for carrying the recording paper from the downstream side in the forward direction to the recording section, performing recording on the back surface by the recording head, and discharging the recording sheet to the upstream side in the forward direction of the recording section. Reversing the recording paper conveyed from the side The guide plate is a loop-shaped guide plate for carrying the paper back to the recording unit. The guide plate forms a standby area for the recording paper, and a heating element is provided in the loop shape of the guide plate to dry the recording paper. According to the above configuration, a resist finger for restraining or releasing the restraint of the leading edge of the recording sheet is provided at the recording sheet conveying exit of the second conveying means, and the length of the inner circumference of the guide plate forming the standby area of the recording sheet is increased. The length of the recording paper to be used is made shorter than the shortest length of the recording paper to be used, and a part of the recording paper fed from the recording paper feed entrance of the second feeding means bends in the waiting area and stands by. That is, when a longest recording paper to be used is conveyed by forming a concave portion on the inner periphery of the guide plate that forms the standby area of the recording paper, a part of the recording paper enters the concave portion. Configuration to wait in a state That is, the cross-sectional shape of the recess is such that the leading end of the recess-side guide plate is provided in the tangential direction of the rear end of the guide plate on the entrance side of the recess, and the recording paper is continuously guided and conveyed. When the trailing edge of the recording paper reaches the conveyance entrance of the second conveying means, the recording head reverses the data of the character or image to be recorded by 180 ° if there is a recording request for the next page, and the recording paper is recorded. It is controlled to record the inverted character or image on the back surface of the.

[0006]

In the recording apparatus constructed as described above, the recording sheet is reciprocally conveyed to the recording section by the conveying means, and the recording area immediately after recording is performed in the standby area adjusted to a high temperature atmosphere area suitable for high recording quality. By actively exposing the paper to high temperatures, it becomes possible to dry the ink after recording in inkjet recording, etc. in a high temperature atmosphere, preventing deterioration of the recording quality of characters and images, and easy With such a configuration, it is possible to provide a recording apparatus in which recording is performed immediately after recording on the front surface of the recording paper and drying and recording on the back surface of the recording paper, and discharging and stacking in the order of reception or recording.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic configuration explanatory view of a recording apparatus of the present invention. This recording apparatus is an inkjet recording apparatus using a cut sheet, and is roughly composed of a reading mechanism 100 and a recording mechanism 200. The recording mechanism 200 includes a paper feed unit 4, a recording unit 3, a first conveyance unit 5, a second conveyance unit 6, a guide unit 7, a paper ejection tray 12, and the like.
In the paper feeding section 4, the recording paper 2 stored in the recording paper cassette 11 is picked up from the topmost one.
The paper is fed by the separating roller 14 and the conveying roller 15, and the operation of separating the sheet into one sheet and the conveying operation in the A direction (forward direction) are performed. The recording paper is fed in the forward direction until the leading edge of the recording paper reaches the first conveying means 5. When a detector such as a photo sensor (not shown) detects that the recording paper 2 has reached the first conveying means 5,
A control unit (not shown) rotates the transport roller 15 for a predetermined time and then stops. As a result, the registration adjustment of the recording paper 2 is performed.

FIG. 2 is an explanatory view of the structure of the main part of the recording paper.
The first conveying means 5 is composed of a driving roller 5c, a pressure roller 5d and a pressure roller 5e. The central drive roller 5c is rotated in one direction indicated by an arrow B by a drive system (not shown), and the pressure roller 5d and the pressure roller 5e are pressed against the outer peripheral surface of the drive roller 5c by a pressing means (not shown). The recording paper 2 which is disposed in the recording medium 3 and which passes through the nip portion between the driving roller 5c and the pressure roller 5d is carried into the recording unit 3. The recording paper 2 passing through the nip portion between the drive roller 5c and the pressure roller 5e is conveyed in the direction indicated by an arrow G (upstream in the forward direction). The leading end of the recording paper 2 is conveyed to the second conveying means 6 by the driving roller 6c and the pressure roller 6d, and then, in the arrow C direction of the inner peripheral surface of the loop-shaped waiting area 7b of the guide plate 7a of the guide means 7. To reach the resist finger 9.

The second conveying means 6 comprises a driving roller 6c, a pressure roller 6d and a pressure roller 6e. The central drive roller 6c is rotated in one direction indicated by an arrow D by a drive system (not shown), and a pressure roller 6d and a pressure roller 6e, which are pressed by a pressing means (not shown) on the outer peripheral surface of the drive roller 6c, are arranged as shown. Then, the recording paper 2 is carried out from the recording unit 3. The recording paper passing through the nip portion between the drive roller 6c and the pressure roller 6d is conveyed in the direction indicated by arrow C (downstream side in the forward direction). The recording paper passing through the nip portion between the driving roller 6c and the pressure roller 6e is conveyed backward to the recording unit 3.

The registration finger 9 is for feeding the front end of the recording paper 2 between the drive roller 6c and the pressure roller 6e at a predetermined timing. The registration finger 9 is rotated in a direction indicated by an arrow E using a solenoid (not shown) and a link using a fulcrum shaft 16 as a fulcrum as shown in the drawing, and is temporarily stopped at a dotted line position. The leading end of the sheet is sent between the drive roller 6c and the pressure roller 6e and is carried into the recording unit 3.

At the transfer entrance 5a of the first transfer means 5, a direction switching plate 17 is rotatably arranged with a fulcrum shaft 18 as a fulcrum as shown in the drawing. When the recording paper 2 is conveyed from the recording paper cassette 11 to the standby area 7b, the direction switching plate 17 is retracted to a position substantially flush with the surface of the guide plate 19, and the leading end of the recording paper 2 is illustrated. It is conveyed in the direction of arrow A. However, the direction switching plate 17 is located in the second area from the standby area 7b.
When the recording sheet 2 is conveyed by the conveying means 6 and is fed backward in the direction of the first conveying means 5, the recording sheet 2 is rotated in the arrow F direction shown in the figure by a solenoid and a link (not shown) to move to the dotted line position, and the driving roller 5c. And the contact point of the pressure roller 5e are switched, so that the recording paper is conveyed in the direction of arrow G shown in the figure. At this time, the leading end of the recording paper 2 is driven by the drive roller 5c.
Then, the sheet is discharged from the recording section 3 by the pressure roller 5e and conveyed in the direction of the sheet discharge tray 12. Drive roller 6
Since c and the pressure roller 5e are in contact with the recording surface after recording, they are not formed of a material or shape such as rubber that scrapes the recording surface, but are formed in a spur shape or the like having a plurality of irregularities made of resin or metal.

The recording head 1 of the recording unit 3 is movably supported in the main scanning direction (direction orthogonal to the conveying direction of the arrow A of the recording paper 2 in the drawing), and based on the recording data of characters and images, An image is recorded on the recording paper 2 by ejecting a predetermined bit of ink in synchronization with the conveyance of the recording paper 2.
Since the gap between the recording head 1 and the recording paper 2 affects the reproducibility of characters and images, the guide plate 19 is set so that the gap is constant when the recording paper 2 is moved forward and backward.

FIG. 3A is an enlarged view showing the structure of the guide means. The recording paper 2 which is fed from the recording paper cassette 11 (not shown) and whose recording on the front surface is completed is the driving roller 6
It is conveyed in the C direction by c and the pressure roller 6d,
The guide means 7 is guided by the inner surface of the loop-shaped guide plate 7a forming the waiting area 7b, and is fed until the leading end of the recording paper 2 reaches the resist finger 9. The space inside the guide plate 7a is preferably sealed from the outside in order to maintain an atmosphere for drying, but it may be ventilated if necessary. Therefore, the guide plate 7a shown in the drawing is closed in the front-back direction of the drawing. In the standby area 7b inside the guide plate 7a, a heating element 8 such as a halogen heater is arranged, and the recording paper 2 immediately after recording is recorded.
Is actively exposed to high temperature to adjust to a high temperature atmosphere area suitable for high recording quality. The temperature of the atmosphere area may be warmed by guiding the heat generated from the control unit, the power supply unit, and the like of the recording apparatus main body (not shown) to the standby area 7b using a duct, a fan, or the like. Even if a planar heater is provided on the outer surface of the guide plate 7a outside the standby area 7b, or the heat generated from the control unit, the power supply unit, etc. of the apparatus is guided by using a duct, a fan, etc., as described above, and it is directly heated. Good.

FIG. 3 (b) is an explanatory view of the operation of the guide means of FIG. 3 (a). The length of the inner circumference of the guide plate 7a forming the waiting area 7b in the C direction is the shortest of the recording paper used. Is set shorter than the length of the recording paper 2, and after the leading end of the recording paper 2 reaches the registration finger 9, the recording paper 2 becomes a loop in the standby area 7b, and the waist (elasticity) of the recording paper 2 causes When the registration finger 9 rotates in the clockwise direction and retracts from the recording paper conveyance path, the leading end of the registration finger 9 enters between the drive roller 6c and the pressure roller 6e of the second conveyance means 6 and is subsequently conveyed to the recording section 3. Thus, it becomes possible to shift to the transport state in the direction of the paper discharge tray 12.

FIG. 4 is a view showing the operating state of the guide means. A recess 10 protruding in the outer radial direction is provided in the middle of the inner periphery of the guide plate 7a forming the standby area 7b, and the longest length to be used. It is possible to make the recording paper of Sasano stand by. That is, even after the leading edge of the recording paper 2 reaches the registration finger 9, the driving roller 6c and the pressure roller 6d of the second conveying means 6 can continue the conveyance to insert the loop of the recording paper 2 into the recess 10. Has become. The cross-sectional shape of the recess is the rear end 10 of the guide plate on the inlet side of the recess.
The leading end 10b of the recess side exit side guide plate is arranged in the tangential direction of a so that the recording paper is continuously guided and conveyed.

FIG. 5 is an explanatory view of a main part configuration of another embodiment of the present invention, in which at least outer peripheral surfaces of the driving roller 6c of the second conveying means 6 and the pressure roller 6e of the first conveying means 5 are arranged in the main scanning direction. By attaching a continuous ink absorbing material 20, it is possible to perform an auxiliary function of drying the recording paper 2. FIG. 6 is a modification of FIG. 5, in which the auxiliary rollers 21 are formed of the ink absorbing material 20, and the auxiliary rollers 21 are provided with respect to the drive roller 6c of the second conveying means 6 and the pressure roller 6e of the first conveying means 5. By bringing them into contact with each other, the recording paper 2
It is also possible to carry out the auxiliary action of drying.

FIG. 7 is a flow chart showing the operation of the recording apparatus. The selection of the front side recording or the back side recording shown in step 1 is performed by designation from a not-shown operation unit or a bit switch. In response to a recording request from a control unit (not shown), in the one-sided recording mode for only the front surface, the register finger 9 is operated immediately after recording and the recording paper 2 is ejected (steps 2 and 3). In the double-sided recording mode on the back side, after the recording preparation for reversing the recording data of characters and images by 180 ° is completed, the resist finger 9 is operated,
Recording is performed in synchronization with the conveyance of the recording paper 2 (steps 5, 6, and 7). In the above description of the embodiment, the operation when the recording paper 2 is the cut paper has been described, but the present invention can be applied to the case where roll paper is used. In this case, a cutter is provided. The same drying process may be applied to the recording paper cut into a predetermined length.

[0018]

Since the present invention is configured as described above, the recording sheet is reciprocally conveyed to the recording section by the conveying means and is adjusted to a high temperature atmosphere suitable for maintaining a loop-shaped high recording quality. In the standby area, the recording paper immediately after recording is positively exposed to high temperature, so it becomes possible to dry the ink after recording in ink jet recording etc. in a high temperature atmosphere. It is possible to prevent the deterioration of the recording quality and to record on the back surface of the recording paper by drying immediately after recording on the front surface of the recording paper with a simple configuration, and discharging and stacking in the order of reception or recording. Equipment can now be provided.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an embodiment of a recording apparatus to which the present invention is applied.

FIG. 2 is a side view of a main part of the recording apparatus of the present invention.

3A and 3B are a side view of another main part of the recording apparatus of the present invention and an explanatory view showing its operation.

FIG. 4 is an explanatory diagram of an operation state of a main part of FIG.

FIG. 5 is a side view of a main part of a recording apparatus showing another embodiment of the present invention.

FIG. 6 is a side view of the main part of another embodiment of the recording apparatus of the present invention.

FIG. 7 is an example of a flowchart of the operation of the recording apparatus showing the embodiment of the present invention.

[Explanation of Codes] 1 ... Recording head, 2 ... Recording paper, 3 ... Recording unit, 4 ... Paper feeding unit, 5 ... First conveying means, 5a ...
・ Conveyance inlet, 5b ... Conveyance outlet, 5c ... Driving roller, 5d ... Pressure roller, 5e ... Pressure roller, 6 ... Second conveyance means, 6a ... Conveyance inlet, 6b. ..Transport exits, 6c ... Driving rollers, 6d
..Pressure rollers, 6e ... Pressure rollers,
7 ... Guide means, 7a ... Guide plate, 7b ...
Standby area, 8 ... Heating element, 9 ... Resist fingers, 10 ... Recess, 10a ... Rear end, 10b ...
・ Front end, 11 ... Recording paper cassette, 12 ... Paper ejection tray, 13 ... Pickup roller, 14 ... Separation roller, 15 ... Transport roller, 16 ... Support shaft, 17 ...
・ Direction switching plate, 18 ... fulcrum shaft, 19 ... Guide plate, 20 ... Ink absorbing material, 21 ... Auxiliary roller,
100 ... Reading mechanism, 200 ... Recording mechanism.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location 9113-2C B41J 29/00 H

Claims (7)

[Claims] 1. A recording apparatus for recording on a recording sheet conveyed in the sub-scanning direction by a recording section having a recording head, wherein a sheet feeding section and a sheet feeding section feed upstream from the recording section in the forward direction. A first conveying means is provided which can carry the recording paper to be carried into the recording unit and discharge it from the recording unit, and the recording paper recorded on the surface is recorded on the downstream side in the forward direction of the recording unit. The recording medium, the recording medium is ejected from the recording unit, and can be conveyed backward to the recording unit. The recording medium has a second conveying unit and a guide unit that guides the back surface of the recording sheet in the second conveying unit. A recording apparatus, which reversely conveys the recording sheet to the recording section, performs recording on the back surface by a recording head, and then discharges the sheet to the upstream side in the forward direction of the recording section. 2. The guide means is a loop-shaped guide plate for reversing the recording sheet conveyed from the upstream side in the forward direction and conveying the recording sheet to the recording section in the reverse direction, and the guide plate waits for the recording sheet. An area is formed, wherein the area is formed.
The recording device described. 3. The recording apparatus according to claim 1, wherein a heating element is provided in the loop shape of the guide plate to dry the recording paper. 4. A length of an inner circumference of a guide plate which forms a standby area for the recording sheet by providing a resist finger for restraining or releasing the leading edge of the recording sheet at the recording sheet conveying exit of the second conveying means. Is made shorter than the shortest length of the recording paper to be used, and a part of the recording paper fed from the recording paper feed entrance of the second feeding means bends in the waiting area and stands by. The recording apparatus according to claim 1, wherein: 5. A concave portion is formed on the inner periphery of a guide plate forming a standby area of the recording paper, and when the longest recording paper to be used is conveyed, a part of the recording paper enters the concave portion. 2. The recording apparatus according to claim 1, wherein the recording apparatus is configured to stand by in a standstill state. 6. The cross-sectional shape of the recess is such that the tip of the recess-side guide plate is provided in the tangential direction of the rear end of the guide plate on the entrance side of the recess, and the recording paper is continuously guided and conveyed. The recording apparatus according to claim 1, wherein the recording apparatus has a configuration. 7. The recording head, when the trailing edge of the recording paper reaches the conveyance entrance of the second conveying means, reverses the data of the character or image to be recorded by 180 ° if there is a recording request for the next page,
The recording apparatus according to claim 1, wherein the recording apparatus is controlled so as to record the reversed character or image on the back surface of the recording paper.