KR100334098B1 - Apparatus for exiting paper of image forming device - Google Patents

Abstract

According to the present invention, in the paper ejection apparatus of the image forming apparatus, first and second paper guides interlocked by an operation link are disposed on an upper side of the fixing unit, and the first paper guide opens and closes the first stacker side path and the second paper. The guide guides the paper to be conveyed to the second stacker or the stacker for duplex printing, the operation link is driven by the solenoid, and the solenoid is operated on / off based on the signal of the controller. The double-sided printing stacker is provided with a conveying and reversing roller for transferring the paper to the double-sided printing stacker and inverting the sheet to the main body.

According to the present invention configured as described above, the first guide always opens the first stacker side path, the second guide opens the double-sided printing stacker side path. When the print mode is set to load paper on the second stacker, the solenoid is turned on to rotate the operation link, the first paper guide closes the first stacker side path, and the second paper guide opens the second stacker side path. do. When the double-sided printing is selected, the solenoid is turned off immediately after the paper passes the first paper guide so that the second paper guide opens the stacker side path for double-sided printing.

As a result, the paper discharge path is switched through a simple operation in which the user selects a print mode, thereby improving convenience in use.

Description

Paper ejecting device of chemical conversion device {APPARATUS FOR EXITING PAPER OF IMAGE FORMING DEVICE}

The present invention relates to a paper ejection apparatus of an image forming apparatus, and more particularly, to a paper ejecting apparatus of an image forming apparatus in which printing paper is ejected to a selected stacker without a separate manual operation.

In general, a laser beam printer, which is an example of an image forming apparatus, includes a main body 1, a paper feed cassette 2 on which a plurality of sheets are loaded, and a pickup roller that picks up sheets of paper loaded on the paper cassette 2 in a sheet ( 3), a conveying roller 4 for conveying the picked-up paper, a developing machine 5 for forming an image on the surface of the conveyed paper, a fixing unit 6 for fixing the developer printed on the paper surface with heat and pressure, And a plurality of stackers 9 and 10 on which paper discharged by the discharge rollers 7 and 8 is stacked, and discharge rollers 7 and 8 for discharging the paper on which the fixing is completed to the outside of the machine.

The operation of the laser beam printer according to the prior art configured as described above will be briefly described as follows.

When the operation of the machine is started and the pickup roller 3 is driven, the paper loaded in the paper feed cassette 2 is picked up, and then transferred to the developing unit 5 side by the feeding roller 4, and passes through the developing unit 5. While the image is formed on the surface of the paper.

Then, the image is fixed by heat and pressing force while passing through the heat roller 6a and the pressing roller 6b of the fixing unit 6, and is discharged to the outside of the apparatus by the discharge rollers 7 and 8.

At this time, the user is discharged to the selected stacker (9) (10).

In the case of this specification, the paper is always discharged to the first stacker 9, and in order to discharge the paper to the second stacker 10, a separate switch lever (not shown) is operated to change the paper feed path. Is discharged to the second stacker (10).

However, according to the paper discharging device of the conventional image forming apparatus configured as described above, in order to discharge the paper to the second stacker 10, it is inconvenient for the user to manually operate the discharge path switching lever every time.

In addition, when the printer is installed at a long distance, it is inconvenient for the user to move to the printer to switch the transfer path.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a paper discharge device of an image forming apparatus in which a paper which has been printed is discharged to a selected stacker through a simple and simple operation during a print command.

In addition, another object of the present invention is to enable the user to switch the discharge path of the paper without moving.

1 is a schematic diagram of a typical laser beam printer.

2 is a schematic view of a laser beam printer to which an embodiment according to the present invention is applied.

3 to 5 show the operating state of the embodiment according to the present invention,

3 is to discharge the paper to the first stacker,

4 is a sheet discharged to the second stacker,

Fig. 5 allows the paper to be transported for duplex printing.

<Description of the code used in the main part of the drawing>

1: fuser unit 6: fuser unit

9,10,30: Stacker 20, 40: Paper guide

50: operation link 60: solenoid

The paper ejection apparatus of the image forming apparatus of the present invention for achieving the above object, the first and second stacker on which the discharged paper is loaded, and to guide the print paper to be discharged to the selected stacker of the first and second stacker A guide means, an operating means for operating the guide means, a driving means for driving the operating means, and a control unit for controlling the driving means to discharge printing paper to a selected stacker, wherein the guide means includes the first means. And a second guide member for opening and closing the stacker side path, and a second guide member for opening and closing the second stacker side path in association with the first guide member.

Preferably, the drive means is a solenoid.

Preferably, the operation means is a link for interlocking the respective paper guides.

A double-sided printing stacker disposed below the second stacker, and a transfer and reversing roller for transferring printing paper to the double-sided printing stacker and reversing the machine body, wherein the second paper guide includes the second stacker side path and It is preferable to open and close the stacker side path for double-sided printing.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a paper discharge device of the image forming apparatus according to the present invention will be described in detail.

2 is a schematic diagram of a laser beam printer to which an embodiment according to the present invention is applied, and FIGS. 3 to 5 show an operating state of the embodiment according to the present invention, and FIG. 3 shows a path through which paper is discharged to the first stacker. 4 illustrates a path through which paper is discharged to the second stacker, and FIG. 5 illustrates a transfer path during duplex printing. For convenience of description, the same member numbers are assigned to the same constituent members as in the prior art.

As shown in the drawing, the paper discharging device of the present invention includes a first paper guide 20 for guiding the fixed paper to be discharged to the selected stacker among the first and second stackers 9 and 10, and a paper for which the fixing is completed. The second paper guide 40 to guide the transfer to the second stacker 10 or the stacker 30 for duplex printing, and the upper end is coupled to the main body 1 through the hinge 51 and the first and second paper guides ( 20 and 40 are connected to each other so that the operation link 50 for interlocking the respective paper guides 20 and 40 and the solenoid 60 for driving the operation link 50 according to the selected mode.

The first paper guide 20 is fixed to the operation link 50, and the second paper guide 40 is bent and formed at the center thereof so that the upper end thereof is rotatably fixed to the operation link 50 and the bent part is the main body 1. It is coupled via the hinge 41 to.

The first, second and third transfer rollers 70, 71 and 72 are sequentially arranged at the entrance of the double-sided printing stacker 30 from the upper side to the lower side, and the reverse roller 73 at the position spaced apart from the front by a predetermined distance. ) Is placed.

Referring to the operating state of the embodiment according to the present invention configured as described above are as follows.

Embodiments according to the present invention operate in three modes. That is, the paper is a mode to be discharged to the first stacker (9), the mode to be discharged to the second stacker (10) and the mode to be transferred to the stacker 30 for duplex printing. Hereinafter, the three modes will be described as follows.

As shown in FIG. 3, the solenoid 60 is always in an off state, whereby the first paper guide 20 has a first stacker (1) by which the paper having passed through the fixing unit 6 is discharged by the first discharge roller 7. 9) to be discharged.

If the mode is selected at the time of printing command to discharge the paper to the second stacker 10, the paper sensor (not shown) is applied to the solenoid 60 at the point of detecting the leading edge of the paper passing through the fixing unit 6. Current is applied to insert the plunger 61.

As shown in FIG. 4, the operation link 50 is rotated about the hinge 51 by the insertion of the plunger 61, and the first paper guide 20 is integrally rotated when the operation link 50 is rotated. While closing the path of the first stacker 9 side while opening the path of the second stacker 10 side. In conjunction with this, the second paper guide 50 is rotated about the hinge 51 to open the second stacker 10 side path while closing the double side printing stacker 30 side path.

The printing paper is guided by the first and second paper guides 20 and 40, and is discharged to the second stacker 10 by the rotational force of the second discharge roller 8.

Finally, when the duplex printing mode is selected, as shown in FIG. 5, the current is first applied to the solenoid 50 so that the first paper guide 20 is connected to the second stacker 10 by the actuating link 50 like the virtual line. Alternatively, the double-sided printing stacker 30 side path is opened. At this time, the second stacker 40 closes the double-sided printing stacker 30 side path. That is, the paper is conveyed to the second stacker 40 or the stacker 30 for duplex printing while being guided by the first paper guide 20.

Subsequently, when the paper passes the first paper guide 20, the current applied to the solenoid 50 is cut off, and each paper guide 20 and 40 is returned as a solid line so that the second paper guide 40 is second. The stacker 10 side path is closed and at the same time the stacker 30 side path for double-sided printing is opened.

The paper is loaded on the double-sided printing stacker 30 by passing between the first and second conveying rollers 70 and 71 at the entry port side of the double-sided printing stacker 30 while being guided by the second paper guide 40. The sheet is conveyed back to the main body 1 by the reversing roller 73, and the paper is conveyed into the main body 1 while passing through the second and third conveying rollers 71 and 72.

When the paper enters the duplex printing path and the paper sensor detects that there is no paper, the current applied to the solenoid 60 is cut off, and the operation link 50 is returned to its original position, thereby returning each paper guide 20 (40). ) Is returned to the original position.

Then, when the paper passes through the fixing unit 6, as described above, current is applied to the solenoid 60 so that the first paper guide 20 has the paper stacking side of the second stacker 10 or the stacker 30 for duplex printing. When the leading edge of the paper passes through the first paper guide 20, the current is cut off so that the paper is transferred to the double-sided printing stacker 30 while the second paper guide 40 is rotated.

Therefore, while the paper discharge path is conventionally changed by the user by operating the path switching lever, according to the present invention, the switching is possible through the operation of selecting the mode with the print command, thereby simplifying the switching operation. Does not have to move to the printer side.

As described above, according to the paper discharging device of the image forming apparatus of the present invention, the user can switch the paper discharge path through a simple and simple operation of operating the PC, thereby improving convenience of use.

Claims (6)

First and second stackers on which the discharged paper is stacked, guide means for guiding the print paper to be discharged to the selected stacker among the first and second stackers, operating means for operating the guide means, and driving the operating means. A driving means and a control portion for controlling the driving means so that the printing paper is discharged to the selected stacker, And the guide means comprises a first guide member for opening and closing the first stacker side path, and a second guide member for opening and closing the second stacker side path in association with the first guide member. Paper ejector. The paper sheet discharging device according to claim 1, wherein the driving means is a solenoid. delete delete The paper sheet discharging device of an image forming apparatus according to claim 1 or 2, wherein said operating means is a link for interlocking said respective paper guides. The stacker according to claim 1 or 2, further comprising a stacker for duplex printing disposed under the second stacker, and a transfer and reversing roller for transferring printing paper to the stacker for duplex printing and reversing to the apparatus main body. 2. The paper guide of the image forming apparatus, wherein the paper guides open and close the second stacker side path and the duplex stacker side path.