KR20040064051A - Ink-jet printer - Google Patents

Abstract

PURPOSE: An ink jet printer is provided to allow a user to easily remove a paper when a paper jam occurs without causing damage to a print head by moving a carrier in a direction reverse to a movement direction of the carrier. CONSTITUTION: An ink jet printer includes a main frame(101). Both ends of a guide shaft(140) are fixed to the main frame(101). A conveyer belt(151) is rotatably installed on the main frame(101). A carrier(120) is movably installed on the guide shaft(140) in such a manner that the carrier(120) moves along the guide shaft(140). The carrier(120) is connected to the conveyer belt(151) in such a manner that the carrier(120) moves in a direction vertical to a conveying direction of a paper. A plurality of ink cartridges(110) are mounted on the carrier(120) in order to store ink therein. Plural print heads are provided at a lower portion of the ink cartridges(110).

Description

Inkjet Printers {Ink-jet printer}

The present invention relates to an inkjet printer, and more particularly to an inkjet printer capable of easily removing jams.

In general, an ink-jet printer is an apparatus for recording an image by ejecting ink onto a paper, and includes a printing head including a chamber containing ink and a plurality of nozzles, which are fine ejection holes for ejecting ink below. While moving the carrier on which the ink cartridge is mounted, the ink is ejected to the outside through the nozzle to print a desired image on the paper.

On the sheet picked up and conveyed from the paper stacking portion, a desired image is formed by ink ejected from the print head. At this time, a phenomenon that paper is caught between the devices may occur, which is called a jam. If the jam occurs, the desired print job is interrupted, which makes it difficult to print smoothly. Therefore, it is necessary to remove the jam, which is a method of removing automatically or manually.

The inkjet printer is provided with a cover open sensor and detects the open state of the body cover when the user opens the body cover for reasons such as removing jams or replacing ink cartridges.

In this method of removing the jam, a method of stopping the printing head at the place where paper jam occurs when the main body cover is detected to be open is disclosed in Japanese Patent Laid-Open No. 57-80091.

As such, the method of stopping the carrier at the time of the jam is not only difficult to remove the paper is jam paper is jammed in the print head, there is a problem that the print head is damaged in the process of removing the paper.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide an inkjet printer capable of easily removing a paper on which jam has occurred without damaging the print head when a jam occurs.

1 is a perspective view showing a schematic configuration of an inkjet printer according to the present invention;

FIG. 2 is a front view of the inkjet printer shown in FIG. 1;

Figure 3 is a block diagram for removing the jam of the inkjet printer according to the present invention,

4 illustrates an example of moving a carrier to remove jams according to the present invention;

5 shows another example of moving a carrier to remove jams in accordance with the present invention;

6 is a flow chart for removing jam according to the present invention.

<Description of the symbols for the main parts of the drawings>

Ink cartridges 110 Ink cartridges

111.Factor head 120 ... Carrier

130 ... feeding roller 131 ... backup roller

152 ... carrier motor 170 ... feeding roller drive

200 ... control unit 210 ... cover open / close detection unit

220.Paper jam detection unit

In order to achieve the above object, the inkjet printer of the present invention loads ink and has an ink cartridge provided with a print head having a plurality of nozzles formed thereon for discharging the ink to the outside, and the ink cartridge is loaded and the paper conveying direction. The paper jam was generated by a carrier moving in the vertical direction with respect to the cover, a cover opening / closing detection section for detecting whether the printer body cover was opened or closed, a paper jam detection section for detecting whether or not paper jam occurred, and the paper jam detection section. An inkjet printer having a control unit for moving the carrier to a predetermined position when it is determined,

When the jam is detected by the paper jam detecting unit, the control unit moves the carrier from the jam generating position to the position where the carrier was when starting printing in the opposite direction along the path from which the carrier was moved. It is characterized in that the jammed paper can be easily removed.

According to the present invention, the position where the carrier was at the start of printing is in the home position.

According to another feature of the invention, if it is determined that the jam occurred in the step of determining whether the main cover is open, whether or not the jam is generated in the conveyed paper, and determining whether the jam occurred Moving the carrier to a printing start position.

According to the present invention, the method may further include stopping printing after determining whether the jam has occurred.

According to the present invention, after the step of moving the carrier to the printing start position further comprises the step of outputting a jam generation message.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a schematic configuration of an inkjet printer according to the present invention, Figure 2 is a front view of the inkjet printer shown in FIG.

1 and 2, both ends of the guide shaft 140 are fixed to the main frame 101. On the upper side of the guide shaft 140, the transport belt 151 is rotatably installed on the main frame 101. The guide shaft 140 is installed on the guide shaft 140 such that the carrier 120 is movable along the guide shaft 140 in a straight reciprocating motion, that is, in a vertical direction with respect to the conveying direction of the paper P.

The carrier 120 is connected to the conveying belt 151 and the conveying direction of the paper (P) along the guide shaft 140 by the conveying belt 151 is rotated by receiving power from the carrier motor 152 Is moved vertically with respect to.

The carrier 120 is detachably mounted with a plurality of ink cartridges 110 in which ink is stored. The ink cartridge 110 is provided with a print head 111 formed therein a plurality of nozzles for discharging the ink to the outside.

The lower side of the guide shaft 140 is rotated in contact with the feeding roller 130 and the feeding roller 130 and the paper (P) therebetween for transporting the paper (P) below the printing head 111 The backup roller 131 which is installed as possible is provided. The feeding roller 130 is connected to the feeding roller driving device 170 is rotated by receiving power.

One side of the guide shaft 140, the bushing member 161 is fixedly installed eccentrically, the head gap adjusting device 160 for adjusting the head gap (G) which is the distance between the printing head 111 and the paper (P) Is installed.

When the bushing member 161 is rotated, the guide shaft 140 is finely moved in the vertical direction and the left and right directions. In particular, when the bushing member 161 is rotated by a predetermined angle, the head shaft G is adjusted by moving the guide shaft 140 by a predetermined distance in the vertical direction.

When the inkjet printer 100 does not print, a head capping device 180 for preventing ink from hardening to the nozzle by covering the print head 111 to block contact with air, the main frame 101 is one side. It is installed adjacent to. The place where the head capping device 180 is located is called a home position.

The home position is a place where the carrier 120 is initially positioned when the print head 111 starts printing. It is a place where the print head 111 stands by in case of not printing. When the print head 111 is moved in the vertical direction with respect to the advancing direction of the paper P in order to print an image on the paper P, the carrier 120 moves into the groove. The image is printed on the paper P while in the position position and moved vertically with respect to the advancing direction of the paper P. FIG.

When the printing is finished, the carrier 120 is moved to the home position and is positioned again. When the print signal is received, the carrier 120 leaves the home position to print.

Figure 3 is a block diagram for removing the jam of the inkjet printer according to the present invention.

Referring to FIG. 3, the control unit 200 includes a CPU that executes various arithmetic processing, a ROM (read only memory) in which a program or initial data necessary for the CPU to process arithmetic operation is recorded in advance, and the CPU performs arithmetic. A random access memory (RAM) is provided for temporarily storing data used for processing.

The cover opening and closing detection unit 210 is a device for detecting whether or not the main body cover is opened and closed, and the paper jam detection unit 220 is a device for detecting whether or not the paper P to be conveyed has occurred. The display device 230 receives a signal from the controller 200 and displays a predetermined message to inform the user of the state of the inkjet printer 100.

The control unit 200 receives a signal from the cover opening / closing detecting unit 210 and the paper jam detecting unit 220 and performs arithmetic processing to process the carrier motor 152, the display device 230, the head gap adjusting device 160, and The operation of the feeding roller driving device 170 is controlled.

4 is a view showing an example of moving the carrier to remove the jam in accordance with the present invention, Figure 5 is a view showing another example of moving the carrier to remove the jam in accordance with the present invention.

Referring to FIG. 4, the printing head 111 moves to the home position, that is, the image is printed on the paper P while moving from the right side to the left side of the drawing, and the original home position state in order to print the image on the next line. Go to, then move from right to left again to print the image.

At this time, when a jam occurs in the paper P, the paper P is wrinkled and caught between the printing head 111 and the feeding roller 130 or the backup roller 131. When the paper P is removed in such a state, the paper P comes into contact with the print head 111, thereby damaging the print head 111. Therefore, the control unit 200 stops the printing operation and operates the carrier motor 152 to move the carrier 120 in the direction of arrow A, that is, to the right in the drawing, from the position where the jam is generated. Move to state. Then, when the paper P is removed, the jam can be easily removed while the print head 111 is not damaged.

Referring to FIG. 5, unlike FIG. 4, FIG. 5 prints an image on the paper P while the printing head 111 is moved from the home position, that is, from right to left in the drawing, and from left to right. Print the image on the next line as it moves. In other words. The printing head 111 prints an image on the paper P while moving from right to left and from left to right.

When the printing head 111 moves from the left side to the right side of the drawing and a jam occurs while printing the image on the paper P, the control unit 200 stops the printing operation and operates the carrier 120. The carrier 120 is moved from the position where the jam is generated to the arrow B direction, that is, to the left side of the drawing. Then, the jammed paper P is fed or the user removes the paper P to remove the jam. Thereafter, the control unit 200 moves the carrier 120 to the home position to wait for the next print signal.

On the other hand, when the print head 111 is moved from the right side to the left side of the drawing and jam occurs during printing the image on the paper P, the jam is removed through the operation as shown in FIG. 4.

Of course, when the home position of the inkjet printer 100 is in a different position, the jam can be easily removed by changing the direction of the arrow.

6 is a flow chart for removing jam according to the present invention.

Referring to FIG. 6, the controller 200 receives a signal from the cover open / close detection unit 210 to determine whether the body cover of the inkjet printer 100 is opened (S601), and when the body cover is opened, the paper. The signal is received from the jam detecting unit 220 to determine whether jam has occurred (S602). If it is determined that the jam has occurred, the control unit 200 stops printing (S603). The control unit 200 operates the carrier motor 152 to start printing the carrier 120 in the opposite direction to which the carrier 120 has been moved from the jam position. In operation S605, a message of “jam occurrence” is output through the display device 230.

On the other hand, if it is determined that the main body cover is not open, it is determined whether the jam has occurred (S606), and if it is determined that the jam has occurred, go to step S603 to perform the above-mentioned steps. If it is determined in step S603 that jam has not occurred, printing is performed (S607).

When the inkjet printer 100 does not print, the carrier 120 is moved to the right side of the drawing by the carrier motor 152 so that the print head 111 is covered by the head capping device 180. It is cut off from the outside air.

On the other hand, in the process of removing the jam as described above by driving the head gap adjusting device 160 to adjust the head cap (G) can be removed more easily.

As described above, the inkjet printer according to the present invention has the effect that the jam can be more easily removed without damaging the print head by moving the carrier in the opposite direction when the paper jam occurs.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (5)

An ink cartridge provided with a print head having a plurality of nozzles formed thereon, the ink cartridge having a plurality of nozzles for loading ink thereon, a carrier for loading the ink cartridge and moving in a direction perpendicular to the conveying direction of the paper; A cover opening / closing detection unit for detecting whether the main body cover is opened or closed, a paper jam detection unit for detecting whether or not paper jam has occurred, and the carrier being moved to a predetermined position when it is determined that the paper jam has been generated by the paper jam detection unit. In an inkjet printer having a control unit to make, When the jam is detected by the paper jam detecting unit, the control unit moves the carrier from the jam generating position to the position where the carrier was when starting printing in the opposite direction along the path from which the carrier was moved. An inkjet printer, characterized in that to make it easy to remove the paper jam. The method of claim 1, And the position at which the carrier was at the start of printing is a home position. Determining whether the body cover is open; Determining whether jammed paper is jammed; And moving the carrier to a print start position when it is determined that the jam has occurred in the determining of the jam occurrence. The method of claim 3, wherein After determining whether the jam has occurred Jam removal method of the ink-jet printer characterized in that it further comprises the step of stopping printing. The method of claim 3, wherein And a step of outputting a jam generation message after the moving of the carrier to a printing start position.