KR100186602B1 - Jammed paper removing apparatus for inkjet printer - Google Patents

Abstract

1. The technical field to which the invention described in the claims belongs.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for removing jam in an inkjet printer.

2. Technical Challenge to be Solved by the Invention.

The present invention relates to an ink jet printer which can remove jams by simple operation without applying excessive force to remove jam when a paper jam phenomenon occurs in the process of printing on an ink jet printer from a user's point of view, And a paper jam removing device for the printer.

3. The point of the solution of the invention.

The present invention relates to a driving gear engaged with gears of a feed roller connected to a driving motor for removing jammed paper generated between a pick-up roller and a friction roller for feeding sheets one by one from a feeding tray; A cam gear fixed to both ends of the shaft immediately before a lever provided opposite to the knock-up plate so that the friction roller rotates around the rotation axis and rotates the lever by rotation; And a connecting gear which is installed on one side of the carriage so as to simultaneously engage between the driving gear and the cam gear by an electric signal when the measuring paper is generated and drives the cam gear by transmitting the power of the motor to the cam gear .

4. An important use of the invention.

INDUSTRIAL APPLICABILITY The present invention is capable of removing jammed paper without any excessive force when the jammed paper is generated in the inkjet printer, thereby preventing damage to the apparatus and removing the jammed paper quickly and easily when the jammed paper is removed.

Description

Jam paper removal device of inkjet printer

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ink jet printer, and more particularly, to a jam paper removing apparatus that automatically removes a paper jam occurring when paper is fed.

As shown in FIG. 1, a conventional ink-jet printer includes a paper tray 12 on which a plurality of sheets of paper 100 are stacked, (14) to maintain a close contact state with the pick-up roller (20). That is, the paper positioned at the uppermost position among the plurality of sheets of paper always keeps contact with the pickup roller 20.

When the motor gear 32 is rotated by the drive motor 30, the pickup roller gear 20a is rotated by the first and second power transmission gears 34 and 36, (Also referred to as an actuator: not shown in the figure), the paper is sequentially transferred to the printing position in which the print head 54 is located. At this time, the paper conveyed to the print head position is pulled out of the paper feed tray 10, and then is accurately conveyed by a friction roller 22 (friction roller) provided at one side of the lever 40 And is conveyed by receiving the feed force. The lever 40 is subjected to a tensile force by a tension coil spring 42 supported by a knock up plate 70 so that the friction roller 22 is in a state of being in close contact with the feed roller 24 So that the paper is accurately conveyed. The feed roller 24 is also rotated by the power transmission gear 38 engaged with the motor gear 32 of the drive motor.

The paper that has passed through the friction roller 22 and the feed roller 24 is received by the timing belt and performs a print function on the paper by linearly reciprocating the carriage 50 about the shaft 56 . That is, ink is ejected from a plurality of nozzle holes formed in the nozzle plate of the print head 54 installed at the bottom of the ink cartridge 52 mounted on the carriage 50, thereby printing on the paper. Subsequently, the paper having been subjected to the printing process is loaded onto the discharge tray by the discharge rollers after passing over the frame.

In the inkjet printing process in which the printing process is performed as described above, when a paper jam occurs, the entire device set is stopped, an LED is displayed on the upper part of the case to output an error indication, The jammed paper is forcibly removed by applying a constant force, and then the printing is continued by pressing the paper feed button again.

However, as described above, when the paper is jammed when the paper is fed, almost a gap occurs between the pickup roller and the friction roller. In order to remove the jammed paper, a method of forcibly pulling the lever Most are mostly. At this time, there is a problem that the entire printer device is damaged by forcibly applying excessive force.

Furthermore, when the jam state of the paper occurs, it is very troublesome to perform various operations in order to remove the jam of the paper.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide an inkjet printer which, when a paper jam occurs in a process of printing on an inkjet printer, Which is capable of removing a paper jam.

It is another object of the present invention to provide a paper jam removing device for an ink jet printer which prevents damage to a device set by applying excessive force to remove jam when a paper jam occurs in an inkjet printer.

According to an aspect of the present invention, there is provided a printing apparatus including a driving roller for removing jammed paper between a pick-up roller and a friction roller, A driving gear engaged with the gear of the feed roller; A cam gear fixed to both ends of the shaft immediately before a lever provided opposite to the knock-up plate so that the friction roller rotates around the rotation axis and rotates the lever by rotation; And a connecting gear which is installed on one side of the carriage so as to simultaneously engage between the driving gear and the cam gear by an electric signal when the measuring paper is generated and drives the cam gear by transmitting the power of the motor to the cam gear .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view showing a configuration of an ink jet printer performing printing on a paper according to a conventional example

2 is a schematic side view showing a configuration of an ink jet printer for performing printing on a paper according to a most preferred embodiment of the present invention

3 is a side view showing an insertion structure of a cam gear according to an embodiment of the present invention;

FIG. 4 is a schematic side view showing a state where a jam removing device for paper is installed when the paper is in a jam state in the ink-jet printer according to the embodiment of the present invention

5 is a schematic side view showing an operation state of a jam paper removing device for removing jammed paper when the paper is jammed in an inkjet printer according to an embodiment of the present invention

DESCRIPTION OF THE REFERENCE NUMERALS

1: drive gear 2: cam gear

2a: Cam gear shaft 3: Connecting gear

4: Compression coil spring 10: Feed tray

20: pickup roller 30: drive motor

40: lever 50: carriage

100: Paper

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same reference numerals are given to the same components as much as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

As shown in FIGS. 2 and 3, the structure of the apparatus for removing jam according to an embodiment of the present invention is roughly divided into a drive gear 1 meshed with a gear 24a of a feed roller 24, A cam gear 2 installed between the lever 70 and one side of the lever 40 so that the lever rotates about the rotation axis and a connection that simultaneously engages the drive gear 1 and the cam gear 2 when the jammed paper is generated, A gear 3, and the like.

The driving gear 1 is connected to a motor (not shown) through a motor gear 32, a transmission gear 38 engaged with the motor gear 32, and a gear 24a of a feed roller engaged with the transmission gear 38 30 are transmitted. The other side of the cam gear 2 is fixed at one side thereof with a tension coil spring 42 fixed at one side thereof to the knock-up plate 70 so as to receive a tensile force at all times, and at the other side a friction roller 22 rotates And is fixed to both ends of the shaft 2a immediately before the lever installed to rotate around the center so as to rotate the lever 40 by rotation. At this time, in order to implement the function of pushing and pulling the lever 40 forward and backward, the end surface of the shaft 2a of the cam gear 2 is formed into a semicircular shape. Therefore, the shaft 2a of the cam gear 2 always keeps a state slightly separated from one side of the lever, because the lever side is also supported by the tension coil spring and the state of the friction roller This is because the pressure must be maintained at all times. The tension coil spring 42 is provided to ensure that the friction roller 22 and the feed roller 24 are in tight contact with each other to accurately convey the paper.

The driving gear 2 and the cam gear 2 are spaced apart from each other and a connecting gear 3 is inserted between the driving gear and the cam gear to transmit the power of the driving motor 30. That is, when the jam paper is generated, the cam gear 2 must be driven, and the connection gear 3 is electrically inserted only when the jam paper is generated for power transmission. This is because the carriage makes a left-right linear motion around the shaft by the timing belt, and the timing belt is set in speed or distance by the drive motor.

The coupling gear 3 is installed at one side of the carriage 50 and is inserted between the driving gear 1 and the cam gear 2 when the carriage moves toward the driving mechanism. do. At this time, a compression coil spring 4 is installed between the carriage 50 and the coupling gear 3 so that the coupling gear 3 can be inserted smoothly between the driving gear 1 and the cam gear 2.

As shown in FIGS. 4 and 5, in the operation according to the above-described configuration, when the paper is sequentially fed one by one by the pick-up roller 20 and the fingers in the paper feed tray 10 on which a plurality of paper sheets 100 are stacked, And the transported paper passes through the friction roller 22 and the feed roller 24. [ At this time, when the jammed paper is generated (area A), the paper is continuously detected even after a certain amount of feeding, so that the printer confirms that the paper of the printer has not been normally transported, and an error signal is displayed on the device. Then, the carriage 50 moves toward the drive gear 1 and the cam gear 2 of the drive mechanism. Then, the connecting gear 3 is engaged between the driving gear and the cam gear to transmit the power of the motor 30 to the cam gear 2. (Power transmission path: driving motor 30 → transmission gear 38 → gear 24a of feed roller → driving gear 1 → connecting gear 3 → cam gear 2)

5, when the drive motor rotates and the cam gear 2 rotates, the shaft 2a rotates, so that the plane of the shaft 2a is in contact with the lever 40, And pushes the lever forward by rotation. Then, the lever 40 rotates clockwise about the rotation axis, and the friction roller 22 moves upward to be separated from the feed roller 24. At this time, the user removes the jammed paper.

When the user presses the paper feed button again, the printer recognizes that the paper feed button has been pressed. Then, the cam gear 2 is rotated counterclockwise (by a right angle) 3 from the drive gear 1 and the cam gear 2. Thereafter, the refeeding operation and the printing operation are continuously performed.

As described above, according to the present invention, when a jammed paper is generated in an inkjet printer, it is possible to remove the jammed paper without applying excessive force, thereby preventing damage to the apparatus and removing the jammed paper quickly and easily . While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (4)

In a driving mechanism of an inkjet printer, (24a) of the feed roller (24) connected to the drive motor (30) for removing the jammed paper generated between the pickup roller (22) and the pickup roller (20) A driving gear (1); The tension coil spring 42 is fixed and resiliently fixed to both ends of the shaft 2a immediately before the lever 40 provided opposite to the knock-up plate so that the friction roller 22 rotates about the rotation axis, A cam gear 2 for rotating the lever 40 by means of the cam gear 2; And a motor provided on one side of the carriage so as to simultaneously engage between the drive gear and the cam gear by an electrical signal when the jammed paper is generated and the power of the motor is transmitted to the cam gear And a connecting gear (3) for driving the cam gear (3). The apparatus of claim 1, wherein a cross section of the shaft (2a) of the cam gear is semicircular to rotate the friction roller (22). The cam gear (2) according to any one of claims 1 to 3, characterized in that the cam gear (2) and the drive gear (1) And a means for removing the jammed paper from the recording medium. The apparatus of claim 3, wherein the elastic means is a compression coil spring (4).