KR100788694B1 - Image forming apparatus providing guide film for path dividing - Google Patents

Abstract

Disclosed is an image forming apparatus having a guide film for partitioning an entry path of paper picked up from various paper feed cassettes. The disclosed image forming apparatus is opened while the support of the guide film falls by its own weight when the door is opened, and when the door is closed, the door is closed by pushing up the support, and a ridge for pushing up the support is provided on the door. It is comprised so that interference between a guide film and a door may not arise as this raised part pushes up a support stand. According to this configuration, since the door and the guide film do not interfere with each other during the opening and closing process, it is possible to prevent damage to the guide film to extend the life and ensure a stable paper feeding operation.

Description

Image forming apparatus providing guide film for path dividing

1 is a view schematically showing an internal structure of an image forming apparatus to which a structure of a conventional jam processing door is applied;

2 is a view showing an open state of the door shown in FIG.

3a to 3c are views sequentially illustrating a process of closing the door in the open state shown in FIG.

4 is a view showing an internal structure of the image forming apparatus to which the structure of the jam processing door of the present invention is applied;

5 is a view showing an open state of the door shown in FIG.

6a to 6c sequentially illustrate the process of closing the door in the open state shown in FIG.

<Description of Symbols for Major Parts of Drawings>

10 ... guide film 11 ... support

21, 22 1st, 2nd paper cassette 30 ...

40.Pickup sensor 41 ... Lever

42.detector 50 ... body

52.Battery 100 ... Door

101.Rump

The present invention relates to an image forming apparatus having a guide film for partitioning an entry path of paper picked up from various paper cassettes, and more particularly, to an image forming apparatus having an improved interlocking structure between a door and a guide film on one side of a main body. will be.

In general, an image forming apparatus such as an electrophotographic printer, as shown in FIG. 1, supplies paper from the paper feeding cassette 20, prints an image on the paper through development and fixing, and then discharges the paper 52. It has a structure to discharge. That is, when a print job is started, sheets of paper stored in the paper feed cassette 20 are fed one by one, and the developing unit 31 of the printing unit 30 develops an image on the sheets, and the fixing unit 32 develops the developed image. It is fixed by heat pressing. Subsequently, the paper on which printing is completed through such a phenomenon and fixing is discharged to the discharge tray 52.

In recent years, as the demand for mass printing increases, a multi-stage paper feed cassette 20 is mounted, and a structure capable of printing while supplying paper from a desired paper feed cassette 20 alternately or selectively is becoming common. It is becoming. That is, as shown in the drawing, the first and second paper feed cassettes 21 and 22 are mounted to the image forming apparatus main body 50 in multiple stages, and the desired cassettes 21 and 22 are selected to feed the paper contained therein, Or, if the paper in one cassette runs out, the paper will continue feeding from the other cassette. In this case, not only can a large amount of paper be accommodated, it can cope with large-scale printing effectively, and a paper of a different standard can be stored for each cassette 21, 22 so that a paper of a desired standard can be selected and used. It is a trend that is applied to a lot of image forming apparatus.

On the other hand, a pickup sensor 40 for detecting whether the paper is picked up is installed in a path through which the paper picked up from the paper feed cassettes 21 and 22 passes. The pickup sensor 40 is a kind of touch sensor, and when the paper passes through the lever 41 of the sensor 40 and passes, the sensing unit 42 detects the displacement of the lever 41 to generate a paper passing signal. Let's go. Therefore, it is possible to know from the signal of this pickup sensor 40 whether the paper is normally picked up and entered the paper feed path. Reference numeral 10 denotes a guide film that divides a path through which paper picked up from the first cassette 21 enters a paper feed path and a path through which paper picked up from the second cassette 22 enters. That is, the paper picked up from the first cassette 21 is directed toward one surface of the guide film 10 to reach the lever 41 of the pickup sensor 40, and the paper picked up from the second cassette 22 is guide film. Proceeding to the other surface of the (10) is to contact the lever 41 of the pickup sensor (40). The guide film 10 is installed adjacent to the door 51 provided in the main body for opening and closing, and when the door 51 is opened, the guide film 10 is configured to open while falling down by its own weight as shown in FIG. 2. That is, the support 11 supporting the guide film 10 falls down at the same time as the door 51 is opened, thereby opening the paper feed path. Therefore, when the paper picked up from the first cassette 21 or the paper picked up from the second cassette 22 is jammed, the guide film 10 is also opened when the door 51 is opened. Can be processed.

However, when the door 51 is opened and closed, the support 11 of the guide film 10 is pushed by the door 51 to stand as shown in FIGS. 3A to 3C. In this case, the guide film 10 The end of) often occurs while touching the door 51 as shown in Figure 3a and 3b. If the degree of damage is severe, the sheet may be deformed to be difficult to guide properly, and countermeasures are required.

The present invention was created in view of the above necessity, and has an interlocking structure at the time of opening and closing to solve the problem of damage to the guide film due to contact between the opening and closing door for jam processing and the guide film for partitioning the paper path. It is an object of the present invention to provide an improved image forming apparatus.

The present invention for achieving the above object is provided with a door that is rotatably installed on the image forming apparatus main body, and a guide film coupled to a support installed rotatably inside the door to partition the paper feed path. The image forming apparatus, wherein the support is also opened by falling down by its own weight when the door is opened, and when the door is closed, the door is closed while pushing the support, wherein the door is configured to push up the support. Since the ridge is provided, the ridge does not cause interference between the guide film and the door as the support is pushed up.

Here, the ridge may be simply provided at the side end of the door.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

4 shows an image forming apparatus according to the present invention.

As shown, the image forming apparatus of the present invention also feeds paper from the first and second cassettes 21 and 22 mounted in multiple stages, and at the printing unit 30 including the developing unit 31, the fixing unit 32, and the like. An image is printed and the printed paper is discharged out of the main body 100 to be loaded on the discharge tray 52.

A characteristic of the present invention is the guide film 10 which partitions the path of the paper picked up from the first and second cassettes 21 and 22 and the door 100 installed in the main body 50 for opening and closing for jam processing. ) Is to improve the interworking structure.

First, the guide film 10 is disposed below the pickup sensor 40 in a state in which it is coupled to the support 11, and the paper picked up from the first cassette 21 and the second cassette 22 are picked up. The paper partitions the path leading to the pickup sensor 40. Therefore, the paper picked up from the first cassette 21 is advanced toward one surface of the guide film 10 to reach the lever 41 of the pickup sensor 40, and the paper picked up from the second cassette 22 is guide film. Proceeding to the other surface of the (10) is to contact the lever 41 of the pickup sensor (40).

Here, the guide film 10 is opened with the support 11 falls down by its own weight as shown in FIG. 5 when the door 100 is opened. Therefore, the jam generated in the path before and after the guide film 10 can be easily processed by opening the door 100. When the jam processing is completed and the door 100 is closed again, the support 11 is also pushed together to stand and the guide film 10 enters the original position. In this case, the guide film 10 is different from the conventional door 100. No contact occurs with This is because the ridge 101 is formed at the side end of the door 100 so that the slide bar 11a of the support 11 moves on the ridge 101. Therefore, the moment when the guide film 10 touches the door 100 while closing the door 100 is changed to a state in which it does not touch at all as shown in FIGS. 6A and 6B. Therefore, damage to the guide film 10 due to the opening and closing of the door 100 can be prevented.

When using the image forming apparatus having such a structure, the paper picked up from the first cassette 21 proceeds through one side of the guide film 10 to enter the paper feed path, and the paper picked up from the second cassette 22. Enters the paper feed path while passing between the other surface of the guide film 10 and the inner wall of the door 100. Of course, after entering, it is discharged after a printing process such as development and fixing as described above.

And, if paper jam occurs around the guide film 10 during the paper pick-up process, the jam is processed by opening the door 100 as shown in FIG. After the jam is processed, the guide film 10 is returned to its original position by closing the door 100 as shown in FIGS. 6A to 6C. In this case, the guide film 10 does not touch the door 100 as it is. Therefore, the phenomenon of being damaged by repeating the opening / closing operation of the door 100 disappears.

Therefore, it is possible to ensure a stable guide by extending the life of the guide film (10).

The image forming apparatus of the present invention as described above, by improving the opening and closing interlocking structure of the opening and closing door for jam processing and the guide film partitioning the path of the paper to prevent interference between each other, to extend the life of the guide film Provides the effect of ensuring a stable paper guide function.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims (2)

A guide film rotatably installed on the image forming apparatus main body and rotatably coupled to a support installed on the inside of the door so as to partition a paper feeding path, and the support stand also has its own weight when the door is opened. In the image forming apparatus is opened while falling by the door, the door is closed by pushing the support when the door is closed, The door is provided with a ridge for pushing up the support, And the ridge protrudes the support so that the interference between the guide film and the door does not occur. The method of claim 1, And the ridge is provided at a side end of the door.

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