KR20140084986A

KR20140084986A - Apparatus and method for printing image on a paper

Info

Publication number: KR20140084986A
Application number: KR1020120155051A
Authority: KR
Inventors: 한지훈
Original assignee: 엘지전자 주식회사
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2014-07-07

Abstract

The present invention relates to a document output apparatus and method for automatically solving paper jams.
A method of outputting a document according to an exemplary embodiment of the present invention is a method of outputting a document to solve a paper jam. The method includes detecting a paper jam, rotating the jammed paper roller at an intermittent speed, And when the sheet is discharged, rotating the roller continuously until the sheet is discharged.

Description

[0001] DESCRIPTION [0002] APPARATUS AND METHOD FOR PRINTING IMAGE ON A PAPER [

The present invention relates to a document output apparatus and method for automatically solving paper jams.

The document output device is a device coupled to a host device including a computer and outputs image data transmitted from the host device to a print medium including paper in accordance with a print signal applied from the host device. Such a document output apparatus includes a print medium supply unit for supplying a print medium, an image forming unit for forming an image on the print medium, and a print medium discharge unit for discharging the print medium on which the image is formed.

A document output apparatus transfers a print sheet along a conveyance path including at least one of a print medium supply unit, an image forming unit and an ejection unit to output a document on which an image is formed.

However, when a paper jam phenomenon occurs in which the conveyed printing paper is interrupted by the conveying path, there is a drawback that the printing can not normally proceed until the user directly removes the printing paper jammed in the conveying path.

The document output apparatus according to an embodiment of the present invention aims to provide user convenience by automatically eliminating paper jams in certain cases.

A method of outputting a document according to an exemplary embodiment of the present invention is a method of outputting a document to solve a paper jam. The method includes detecting a paper jam, rotating the jammed paper roller at an intermittent speed, And when the sheet is discharged, rotating the roller continuously until the sheet is discharged.

A document output apparatus according to an embodiment of the present invention includes a sensor section for sensing paper, a motor section for providing a rotational force, a roller section for receiving the rotational force from the motor section, And controls the motor unit to rotate at an intermittent rotation speed to provide a rotational force at a position where the paper jam is detected. When the paper jam is released, the control unit controls the motor unit to rotate continuously until the paper is discharged And the control unit controls the motor to rotate at a speed lower than the printing speed before the paper jam is detected.

The document output apparatus according to the embodiment of the present invention has an advantage that it can provide user convenience by automatically eliminating the paper jam.

1 is a perspective view showing a configuration of a document output apparatus according to an embodiment of the present invention.
2 is a view showing a print paper feed path of the document output apparatus according to the embodiment of the present invention.
3 is a block diagram illustrating a configuration of a document output apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a document output method according to an embodiment of the present invention.
5 is a flowchart illustrating a document output method according to another embodiment of the present invention.

Hereinafter, a document output apparatus and method according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a perspective view showing a configuration of a document output apparatus according to an embodiment of the present invention.

1, a document output apparatus 10 according to an embodiment of the present invention includes a paper feed cassette 11 for storing print media, that is, a print paper, and an image forming section 18 An ink supply unit 21 for supplying a printing material containing ink to the image forming unit 18 and an image forming unit 18 for transferring the printing paper stored in the paper feeding cassette 11 to the image forming unit 18 A roller portion, and a discharge portion and a discharge roller portion for discharging the paper on which the image is formed while passing through the image forming portion 18. [

In detail, the conveying roller unit includes a first pick-up roller 31 positioned at the top of the front face of the paper feed cassette 11 to pick up the print sheets one by one, and a second pick-up roller 31 which picks up the print paper picked up by the first pick- And a conveying roller 34 for conveying the printing paper passed from the accelerating roller 32 to the image forming unit 18. The printing paper conveyed from the acceleration roller 32 is guided to the conveying roller 34 by the paper feeding guide 12 safely. The printing paper is guided safely to the image forming unit 18 by the guide plate 17 connected to the end of the paper feeding guide 12.

The discharge roller unit includes a vertical roller 37 and a discharge roller 38 for discharging the printing paper passed through the image forming unit 18 to the outside. A pair of idle rollers can be brought into contact with each other in the direction in which they oppose each other on the outer circumferential surface of the sheet discharge roller (38). And, the pair of idler rollers includes a delivery idle roller 381 and a switching idle roller 382, the functions of which are described in more detail below. In addition to the above-mentioned rollers, a plurality of rollers for transferring printing paper will be described in more detail with reference to the drawings below.

The delivery unit includes a delivery guide 19 for guiding the print sheet guided by the vertical roller 37 to be accurately guided to the delivery roller unit, And a guide guide 20 for guiding the guide member 20 accurately.

The image forming unit 18 may be an inkjet head having nozzles for ejecting ink having different colors at a high speed. The inkjet head may include a PSA Page Straight Array) head or a PWP (Page Width Printer) head. However, the present invention is not limited to this, and a shuttle-typed head that reciprocates left and right with the ink cartridge mounted is also possible. Further, it is needless to say that the image forming unit 18 may be a transfer type head for jetting toner.

The document output apparatus 10 includes a main motor 13 for providing a rotational force to the conveying roller unit, a gear assembly for transmitting rotational force generated by the main motor 13 to a plurality of conveying roller shafts, (14). A plurality of rotation shafts can be simultaneously rotated from a rotation force supplied from a single driving source by the gear assembly 14.

The document outputting apparatus 10 further includes a feed motor 15 for providing a rotating force to the paper discharge roller unit and a duplexer 15 for providing a rotational force to an inversion roller unit (to be described later) A motor (Duplex motor) 16 may be further included.

The printing process of the document output apparatus 10 according to the embodiment of the present invention will be briefly described. The printing paper loaded on the paper feed cassette 11 is conveyed to the image forming unit 18, and the printing paper on which the image is printed on one side while passing through the image forming portion 18 is discharged to the outside of the output device through the discharge roller portion and the discharge portion.

Next, referring to Fig. 2, the feeding path of the printing paper loaded in the paper feed cassette 11 will be described in detail.

2 is a view showing a print paper feed path of the document output apparatus according to the embodiment of the present invention.

2, the document output apparatus 10 according to the embodiment of the present invention may be printed using the printing paper loaded in the paper feed cassette 11 or may be a multi-purpose tray or a manual tray Manual Paper Tray). The document output apparatus 10 includes a first pickup roller 31 provided at an upper front of the paper feed cassette 11 and a second pickup roller 33 provided at a front end of the multipurpose tray or the manual tray, . &Lt; / RTI >

In detail, a conveying roller 34 for conveying the printing paper to the image forming unit 18 is provided in front of the first and second pick-up rollers 31 and 33. An acceleration roller 32 is provided between the conveying roller 34 and the first pick-up roller 31 to transfer the picked-up print paper by the first pick-up roller 31 at a high speed. That is, the linear velocity of the acceleration roller 32 is set to be faster than the linear velocity of the first pick-up roller 31. Here, when the linear velocity of the first pick-up roller 31 is set to be close to the linear velocity of the acceleration roller 32, the printing paper may not be picked up and the idling may occur. Therefore, it is general to set the linear velocity of the first pickup roller 31 to be smaller than the linear velocity of the acceleration roller 32. Since there is a difference in height between the first pick-up roller 31 and the feed roller 34, the leading end of the picked-up print paper is stably held on the feed roller 34 by the pickup roller 31 The acceleration roller 32 is provided for this purpose. The linear velocity of the rollers provided after the acceleration roller 32 may be set to be equal to the linear velocity of the acceleration roller 32. The conveying roller 34 may be disposed at a plurality of points according to the specification of the product.

On the other hand, a drawing roller 35 may be installed in front of the conveying roller 34. The drawing roller 35 is located in a room immediately below the image forming section 18 (with reference to the printing direction of the paper), so that the printing paper can be stably guided to the image forming section 18. According to the product, a skew prevention structure may be provided in a room immediately after the pull-in roller 35 in order to prevent a skew phenomenon of the printing paper. Alternatively, the rotation speed of the pulling-in roller 35 may be controlled so that the fed-in printing paper is returned to the normal position.

A discharge roller 36 is provided in front of the image forming portion 18 so that the printing paper on which an image is formed while passing through the image forming portion 18 is moved out of the image forming portion 18. [ A vertical roller 37 is provided in front of the discharge roller 36 to guide the print sheet out of the image forming portion 18 to the discharge roller 38. [ A paper idler roller 381 is provided on one side of the outer circumferential surface of the paper feed roller 38. Thus, the printed printing paper passes between the paper discharge roller 38 and the paper idle roller 381, and is discharged onto the loading surface on which the printed paper is loaded.

On the other hand, in the case of the document output apparatus 10 provided with the double-side copying function, the reversing idle roller 382 is provided on the other side of the outer periphery of the paper discharge roller 38. Then, the printing paper having been printed passes through between the paper discharge roller 38 and the reversing idle roller 382. That is, the paper discharge roller 38 can perform the paper discharging function and the paper reversing function at the same time. Specifically, before the printing paper is completely released from the discharge roller 38 and the reversing idle roller 382, the discharge roller 38 pauses and then rotates reversely, thereby reversely transferring the printing paper to the reverse path.

A path denoted by A in the drawing can be defined as a print path, and a path denoted by B can be defined as an inversion path. The print path A may include a paper feed path, a print path, and a paper path. The reversal path B reverses the printing paper printed on only one side so that the other side that is not printed is guided to the printing path in a state of facing the image forming unit 18. [ A plurality of conveying rollers 39, 40 and 41 may be spaced apart from each other by a predetermined distance on the reversing path B.

The pickup rollers 31 and 33 and the acceleration roller 32 may be defined as a feed roller unit and the feed roller 34 and the feed roller 35 may be defined as a feed roller unit. The discharge roller 36, the vertical roller 37 and the discharge roller 38 can be defined as discharge roller portions. The feed rollers 30, 40 and 41 provided on the inversion path may be defined as reversing roller units. Each of the rollers constituting the roller portion is provided with a driving roller rotated by a rotational force transmitted from a motor and an idler roller contacting with the driving roller in one unit or a set. The idle roller is a roller that rotates by a moment generated by a frictional force with the printing paper when the printing paper passes.

The rollers bundled with the dashed line M1 can receive the rotational force from the main motor 13 through the gear assembly 14 and the rollers bundled with the dashed line M2 can receive the rotational force from the feed motor 15. [ The rollers bundled with the dotted line M3 can receive the rotational force from the duplex motor 16 through the gear assembly. However, the present invention is not limited to the above-described embodiment, and the paper feeding and conveying roller unit may receive rotational force from the main motor 13, and the paper ejecting roller unit may be designed to receive rotational force from the paper ejecting motor 15. [ That is, the discharge roller 36 and the vertical roller 37 may be designed to receive the rotational force from any one of the main motor 13 and the sheet discharge motor 15.

On the other hand, one or more paper detecting sensors may be disposed in front of, behind, or on the side of each of the plurality of rollers included in the transport path. For example, the first pickup sensor 101 is disposed on one side or both sides of the first pickup roller 31 and the second pickup sensor 103 is disposed on one side or both sides of the second pickup roller 32, Can be disposed. The first and second conveyance sensors 105 and 107 may be disposed in front of each of the plurality of conveyance rollers 34 and the draw sensor 109 may be disposed in front of the draw roller 35. [ A discharge sensor 111 may be disposed behind the discharge roller 36 and a first discharge sensor 113 may be disposed behind the discharge idler roller about the discharge roller 38 and a second discharge sensor 113 may be provided behind the discharge idler roller, An exhaust sensor 115 may be disposed. First and second duplex conveyance sensors 117 and 119 may be disposed behind each of the plurality of conveying rollers 39 and 41.

The document output apparatus 10 can detect at which point the paper jam has occurred by using the paper detection sensor disposed at a plurality of points on the conveyance path.

Next, the functional configuration of the document output apparatus 10 according to the embodiment of the present invention will be described with reference to Fig.

3 is a block diagram illustrating a configuration of a document output apparatus according to an embodiment of the present invention.

3, the document output apparatus 10 according to the embodiment of the present invention includes a sensor unit 100, a control unit 500, a motor unit 700, a roller unit 300, and a display unit 900 .

The sensor unit 100 may include one or more sensors disposed on the transport path. For example, the sensor unit 100 includes pickup sensors 101 and 103 classified according to their disposed positions, feed sensors 105 and 107, a feed-in sensor 109, a feed sensor 111, a feed sensor 113 and 115, a duplex feed sensor (117, 119), and the like.

The sensor unit 100 may generate a paper detection signal when paper is detected at a position where the sensor is disposed. Alternatively, the sensor unit 100 may generate a paper jam detection signal when a paper jam is detected at a position where the sensor is disposed.

Also, the sensor unit 100 may transmit the generated paper detection signal or paper jam detection signal to the control unit 500.

When the paper jam detection signal is transmitted from the sensor unit 100, the control unit 500 can automatically recover the paper jam. Alternatively, the control unit 500 may perform automatic recovery of the paper jam phenomenon when the continuous transmission of the paper detection signal is interrupted. For example, when the paper sensing signal is not transmitted from the sensor disposed in the front even after a predetermined time elapses after the paper sensing signal is transmitted from the sensor disposed rearward with respect to the printing direction of the paper, It is possible to detect that a paper jam has occurred at a point between a sensor disposed at the rear side and a sensor disposed at the front side, but the present invention is not limited thereto.

At this time, the control unit 500 may transmit a message indicating the automatic recovery progress of the paper jam phenomenon to the display unit 900. In addition, when an error is detected during execution of the automatic recovery, the control unit 500 may transmit a message indicating an automatic recovery error to the display unit 900. [

In addition, when the paper jam is detected, the control unit 500 can control the intermittent rotation and the continuous rotation of the motor unit 700 in order to solve the paper jam.

The motor unit 700 can provide rotational force to the conveying roller unit, the discharge roller unit, and the reversing roller unit under the control of the control unit 500. The motor unit 700 may include a main motor 13, a delivery motor 15, a duplex motor 16, and the like. For example, the main motor 13 provides rotational force to the conveying roller section, the ejection motor 15 provides rotational force to the ejection roller section, and the duplex motor 16 can provide rotational force to the reversing roller section. The motor unit 700 may provide an intermittent or continuous rotational force under the control of the control unit 500 and may provide a forward or reverse rotational force.

The roller unit 300 rotates by the rotational force provided by the motor unit 700 to convey the printing paper, or reverse feed the printing paper. The roller unit 300 may include a conveying roller unit, a discharge roller unit, a reversing roller unit, and the like. The roller unit 300 may be rotated in an intermittent or continuous manner, or may be rotated in a forward or reverse direction according to the rotational force provided by the motor unit 700.

The display unit 900 may display information included in the message transmitted from the control unit 500. [ For example, the display unit 900 may display information indicating that the automatic recovery of the paper jam phenomenon is progressing, information indicating that an automatic recovery error has occurred, and the like, and may provide the user with paper jam related information.

Next, a document output method for solving a paper jam on the print path according to an embodiment of the present invention will be described with reference to FIG.

4 is a flowchart illustrating a document output method according to an embodiment of the present invention.

Referring to FIG. 4, the control unit 500 detects occurrence of a paper jam in the document output apparatus 10 (S101). As described above, when the control unit 500 receives the paper jam detection signal transmitted from the sensor unit 100 or stops the continuous paper detection signal transmitted from the sensor unit 100, have. Hereinafter, a method for restoring a paper jam occurring in the print path A by the document output apparatus 10 according to an embodiment of the present invention will be described.

Then, the control unit 500 displays an automatic paper jam recovery notification on the display unit 900 (S103). The paper jam occurrence automatic recovery notification may include notifications such as the fact that the current paper jam occurs and the fact that the document output apparatus 10 automatically started the jam recovery operation, and the present invention is not limited thereto.

Subsequently, when the control unit 500 starts automatic recovery of paper jamming, the main motor 13 performs intermittent rotation (S105). At this time, the control unit 500 can control the intermittent rotation of the main motor 13 when a paper jam occurs between the rollers bounded by the dotted line M1 in the print path A. However, if a paper jam has occurred between the rollers bundled with the dotted line M2 in the print path A, the control unit 500 can perform automatic paper jam recovery by controlling the intermittent rotation of the paper feed motor 15. [

At this time, the control unit 500 may intermittently rotate the main motor 13 or the feed motor 15 to rotate, but may rotate at a revolutions per minute (RPM) lower than the normal printing speed. The normal printing speed may mean, for example, the linear speed of the first pick-up roller 31 when the sheet is positioned between the first pick-up roller 31 and the acceleration roller 32, 31 are positioned on the print path on which the rollers are disposed, it may mean the linear velocity of the acceleration roller 32, but is not limited thereto.

On the other hand, the intermittent rotation is performed, for example, after the main motor 13 or the sheet feeding motor 15 provides the roller unit 300 with a continuous rotation force for 2 seconds (Motor On) (Moter Off), it can be performed by repeating the two processes three times.

The control unit 500 rotates the main motor 13 or the feed motor 15 at a speed lower than the normal printing speed so that a torque Torgue in inverse proportion to the number of revolutions per minute is transmitted to the main motor 13 or the feed motor 15, / RTI > That is, when the paper jam occurs, the roller unit 300 in which the paper is jammed rotates at a speed slower than the normal printing speed, but rotates at a rotational force stronger than the normal rotational force, so that the jammed paper can be moved to the next roller.

Then, the control unit 500 determines whether or not the paper jam has been solved (S107). Whether or not the paper jam has been solved can be judged from whether or not the paper has escaped from the roller where the paper jam occurred. For example, the control unit 500 may stop the paper sensing signal transmitted from the sensor disposed behind the roller where the paper jam occurred, from the sensor disposed in front of the roller where the paper jam occurred, It is possible to judge that the paper jam has been solved when a sensing signal is transmitted or when a paper sensing signal is transmitted from at least one sensor arranged in front of and behind the roller positioned in front of the roller where the paper jam occurs. Until the paper jam is cleared, the control unit 500 can repeatedly perform step S105.

If it is determined that the paper jam has been eliminated, the control unit 500 controls the main motor 13 to perform continuous rotation (S109). The main motor 13 can rotate at a speed slower than the normal printing speed in the step S109, and can rotate at a stronger and more continuous rotational force than the normal rotational speed. After the occurrence of the paper jam, wrinkles may occur, or in order to normally eject the paper in the crooked state, step S109 may be provided with the same rotational force as the rotational force provided in step S105.

At this time, the steps S105 to S109 may be performed for a time period during which the paper having the longest side length of the paper is discharged out of all the paper sheets scheduled by the document output apparatus 10. However, the present invention is not limited to this, and steps S105 through S109 may be performed for a predetermined period of time by operator input or user input.

Next, the control unit 500 determines whether the sheet is discharged using the sensor unit 100 (S111). That is, after the automatic restoration is started, the control unit 500 can determine whether a sheet remains on the print path A by using the sheet detection signal transmitted from the sensor unit 100. [

When the paper is ejected, the control unit 500 terminates automatic paper jam recovery (S113). In the case where the sheet is discharged, it may mean that the sheet stuck on one of the rollers included in the print path A is not left on the print path A.

On the other hand, if the paper is not discharged, the control unit 500 displays an automatic recovery error notification on the display unit 900 (S115). The automatic recovery error notification may include, but is not limited to, the fact that the current paper jam has not been solved, and a remedy that the user is required to take manual measures to solve the paper jam.

According to the embodiment of the present invention, even if a paper jam occurs in the document output apparatus 10, the sensor, the motor, the roller, and the like of the document output apparatus 10 The paper jamming can be automatically solved by using the ink jet recording apparatus. Therefore, there is an advantage that the user convenience can be provided.

Next, a document outputting method for solving paper jamming on an inversion path according to an embodiment of the present invention will be described with reference to FIG. In the description of FIG. 5, the description of the same portions as those described with reference to FIG. 4 will be simplified or omitted.

5 is a flowchart illustrating a document output method according to another embodiment of the present invention.

Referring to FIG. 5, the control unit 500 detects occurrence of a paper jam in the document output apparatus 10 (S301). Hereinafter, a method for restoring a paper jam occurring in the reversal path B will be described by the document output apparatus 10 according to an embodiment of the present invention.

Then, the control unit 500 displays an automatic paper jam recovery notification on the display unit 900 (S303).

Subsequently, when the control unit 500 starts automatic recovery of paper jam, the duplex motor 16 performs intermittent rotation (S305). At this time, the control unit 500 can control the intermittent rotation of the duplex motor 16 when a paper jam occurs between the rollers bounded by the dotted line M3 in the reversal path B. However, if paper jamming occurs between the rollers bundled with the dotted line M2 in the reversal path B, the control unit 500 can perform automatic paper jam recovery by controlling the intermittent rotation of the paper ejection motor 15. [

At this time. The control unit 500 can rotate the duplex motor 16 or the feed motor 15 intermittently and rotate in the reverse direction while rotating at a lower speed than the normal printing speed. However, when the rotation of the duplex motor 16 is controlled, it may mean that the duplex printing is in progress and that the sheet can be positioned in the printing path A and the reversing path B. Therefore, in order to prevent collision between the single-sided printing paper on the printing path A and the double-sided printing paper on the inversion path B, the control unit 500 controls the duplex motor 16 or the feeding motor 15 It can be controlled to proceed in the direction opposite to the printing direction.

Then, the control unit 500 determines whether or not the paper jam has been solved (S307). At this time, since the rotation direction of the motor is opposite to the normal printing direction, the control unit 500 stops the paper detection signal transmitted from the sensor disposed in front of the roller where the paper jam occurred in the roller unit 300, When a paper detection signal is transmitted from a sensor disposed behind the roller where the jam is generated or when a paper detection signal is transmitted from at least one sensor disposed at the front and rear of the roller positioned behind the roller where the paper jam occurs, It can be judged that this has been solved.

If it is determined that the paper jam has been eliminated, the control unit 500 controls the duplex motor 16 to perform continuous reverse rotation (S309).

Then, the control unit 500 determines whether the sheet is discharged using the sensor unit 100 (S311).

If the paper is not ejected, the control unit 500 displays an automatic restoration error notification on the display unit 900 (S315).

According to the embodiment of the present invention, even when the paper jam occurs in the document output apparatus 10 provided with the double-sided printing function, the paper jam can be automatically solved, There are advantages.

Claims

A document output method for eliminating paper jam,
Detecting a paper jam;
Rotating the roller in which the paper jam is detected by intermittent rotation; And
And continuously rotating the roller until the paper is discharged if the paper jam is relieved on the roller
Document output method.

The method according to claim 1,
The roller is controlled to rotate at a speed lower than the printing speed before the paper jam is detected
Document output method.

The method according to claim 1,
When the paper jam is detected during one-sided printing, the roller is controlled to rotate in the same direction as the one-sided printing direction,
When the paper jam is detected during back printing of double-sided printing, the roller is controlled to rotate in the direction opposite to the back printing direction
Document output method.

The method according to claim 1,
Further comprising the step of displaying information indicating that the paper jam has occurred when the paper jam is detected and that automatic recovery for performing the paper jam is performed
Document output method.

The method according to claim 1,
If the paper jam is not solved on the roller, rotating the roller detected by the paper jam by intermittent rotation is repeatedly performed
Document output method.

The method according to claim 1,
Further comprising the step of displaying information indicating that an error has occurred in the automatic restoration for eliminating the paper jam when the paper is not discharged within a predetermined period of time.

A sensor unit for sensing paper;
A motor section for providing a rotational force;
A roller unit that receives the rotational force from the motor unit and transfers the sheet; And
Wherein the control unit controls the motor unit to rotate at an intermittent rotation to detect a paper jam using a signal transmitted from the sensor unit and to provide a rotational force at a position where the jam is detected, And controls the motor to rotate continuously at a speed lower than a printing speed before the paper jam is sensed by the motor unit.

8. The method of claim 7,
Wherein the control unit controls the main motor of the motor unit to rotate in the forward direction when the paper jam is detected during one-sided printing,
And controls the sheet feeding motor or the duplex motor of the motor unit to rotate in the reverse direction when the paper jam is detected during back printing of double-side printing.