KR20060003433A - Electrophotographic image forming apparatus - Google Patents

Abstract

The disclosed electrophotographic image forming apparatus includes: a loading unit for discharging and loading a recording medium from a printing unit; A first guide portion provided at a first position of the stacking portion and aligning the recording medium in a first direction parallel to a traveling direction of the recording medium; A second guide portion provided at a second position of the loading portion and arranged in a second direction substantially perpendicular to the first direction to align the leading end of the recording medium; It is characterized by including.

According to the present invention, when a large amount of documents are output, the user does not need to rearrange the outputs, thereby increasing user convenience and enabling automatic sorting of recording media of various standards.

Description

Electrophotographic image forming apparatus

1 is a schematic cross-sectional view of a conventional electrophotographic image forming apparatus.

2 is a cross-sectional view showing a developing cartridge of a conventional electrophotographic image forming apparatus.

3 is a view showing an extracting portion of a conventional electrophotographic image forming apparatus.

4 is a schematic cross-sectional view of an electrophotographic image forming apparatus according to a preferred embodiment of the present invention.

5 is a cross-sectional view showing a developing cartridge of an electrophotographic image forming apparatus according to a preferred embodiment of the present invention.

6 is a view showing a loading unit of the electrophotographic image forming apparatus according to the preferred embodiment of the present invention.

7 is an exploded perspective view showing a loading part of the electrophotographic image forming apparatus according to the preferred embodiment of the present invention.

8A and 8B are side views illustrating an operation of changing a posture of a first guide part with respect to a loading part of an electrophotographic image forming apparatus according to an exemplary embodiment of the present invention.

9 is a view showing an operation of folding the first guide portion and the second guide portion of the electrophotographic image forming apparatus according to the preferred embodiment of the present invention.

FIG. 10 is a view illustrating an operation of rotating and moving a first guide part and a second guide part of an electrophotographic image forming apparatus according to an exemplary embodiment of the present invention.

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

100 ... Frame 110 (110C, 110M, 110Y, 110K) ... Current cartridge

111 Photosensitive drum 112 Develop roller

113 ... Daejeon Roller 114 ... Supply Roller

116 Regulatory member

118 cleaning member 119 storage

120 ... Return belt 121,122,123,124 ... Support roller

140 ... Transfer Roller 130 (130C, 130M, 130Y, 130K) ... Exposure

150 ... Fixed part 151 ... Heating roller

152 ... Pressure Roller 160 ... Printing Unit

170 Cassette 172 Pick-up Roller

174 Feed roller 176 Discharge roller

180 ... Recording medium transfer path 190 ... Loading

200 ... First guide part 201, 205 ... First member, second member

300, 303 ... coupling 301, 304 ... end

305, 306 ... Joining hole 307 ... Transfer path

210 ... 2nd guide part 350, 353 ... coupling part                 

351, 354 ... end 352, 355 ... engagement hole

356 ... Transfer Path

The present invention relates to an electrophotographic image forming apparatus, and more particularly, to an electrophotographic image forming apparatus having an output alignment device.

Generally, the photosensitive drum of an electrophotographic image forming apparatus has an electrostatic latent image of a desired shape by exposure of a predetermined pattern. The electrostatic latent image formed on the photosensitive drum is developed into a toner image by powdery toner, which is transferred to a recording medium via a transfer medium.

1 schematically shows a conventional electrophotographic image forming apparatus, FIG. 2 shows a developing cartridge, and FIG. 3 shows a loading part.

Referring to FIG. 1, an electrophotographic image forming apparatus includes a printing unit 60 for printing an image on a recording medium by an electrophotographic process, a cassette 70 on which the recording medium is loaded, and a recording medium from the cassette 70. A pickup roller 72 to be taken out and a transfer roller 74 for transferring the recording medium.

The printing unit 60 includes four toners each containing toners of different colors, for example, C: cyan, Magenta, Y: yellow, and black: K. The developing cartridge 10C, 10M, 10Y, 10K, the conveyance belt 20, the exposure part 30C, 30M, 30Y, 30K, the transfer roller 40, and the fixing part 50 are included.

The conveying belt 20 is supported by a plurality of support rollers 21, 22, 23, 24 and circulated. Each of the exposure units 30C, 30M, 30Y, and 30K is configured to generate light corresponding to image information of cyan, magenta, yellow, and black colors. According to the signal, it is irradiated with the photosensitive drum 11 of each developing cartridge 10C, 10M, 10Y, and 10K.

2 and 3, each of the developing cartridges 10C, 10M, 10Y, and 10K includes a photosensitive drum 11, a developing roller 12, a charging roller 13, a supply roller 14, and a restricting member 16. ) And a cleaning member 18 and a storage unit 19. The photosensitive drum 11 is installed to expose a part of its outer circumferential surface and rotates in a predetermined direction. The charging roller 13 is applied with a charging bias to charge the outer circumference of the photosensitive drum 11 to a uniform electric potential. The developing roller 12 attaches toner to its outer circumference and supplies it to the photosensitive drum 11. The developing roller 12 contains solid powder toner, and supplies these toners to the electrostatic latent image formed on the photosensitive drum 11 to develop the toner image. A developing bias for supplying these toners to the photosensitive drum 11 is applied to the developing roller 12.

On the outside of the developing roller 12, a supply roller 14 for attaching toner to the developing roller 12 and a toner layer regulating member 16 for regulating the amount of toner attached to the developing roller 12 are provided with a frame (1). Installed in

Each developing cartridge 10C, 10M, 10Y, 10K may further include an agitator (not shown) for transferring the toner contained therein to the feed roller 14 and / or the developing roller 12.                         

The cleaning member 18 is installed in the frame 1 and has one end contacting the photosensitive drum 11 with a predetermined pressure so as to scrape the toner remaining in the photosensitive drum 11 after transfer. . The storage unit 19 is provided inside each of the developing cartridges 10C, 10M, 10Y, and 10K to store the toner removed from the photosensitive drum 11 by the cleaning member 18.

The developing cartridges 10C, 10M, 10Y, and 10K have openings 17 which form passages so that the light scanned by the exposure units 30C, 30M, 30Y, and 30K can be irradiated to the photosensitive drum 11. . The outer circumferential surface exposed to the outer circumference of the photosensitive drum 11 faces the conveyance belt 20.

Four transfer rollers 40 are disposed at positions facing the photosensitive drums 11 of the developing cartridges 10C, 10M, 10Y, and 10K with the conveyance belts 20 interposed therebetween. The toner image is transferred to the recording medium by the electrostatic force acting between the photosensitive drum 11 and the transfer roller 40.

The fixing unit 50 includes a heating roller 51 and a pressure roller 52 to fix the toner image on the recording medium by applying heat and pressure to the toner image transferred to the recording medium. The heating roller 51 is provided so as to be opposed to the pressure roller 52 in the axial direction as a heat source for permanently fixing the toner image. The pressure roller 52 is provided to face the heating roller 51 to apply a high pressure to the recording medium to fix the toner image onto the recording medium.

The decal unit (not shown) removes curl of the recording medium in which curl is generated by heat while passing through the fixing unit 50. The discharge roller 76 discharges the recording medium on which the fixing is completed, out of the electrophotographic image forming apparatus. The recording medium discharged from the discharge roller 76 along the recording medium transfer path 80 is loaded into the loading unit 90.

Hereinafter, the operation of the electrophotographic image forming apparatus according to the related art will be described.

The photosensitive drums 11 of each of the developing cartridges 10C, 10M, 10Y, and 10K are charged at a uniform potential by the charging bias applied to the charging roller 13. The four exposure units 30C, 30M, 30Y, and 30K respectively emit light corresponding to the image information of cyan, magenta, yellow, and black colors through the openings 17 of each of the developing cartridges 10C, 10M, 10Y, and 10K. Irradiate with the photosensitive drum (11). When light is scanned, only the scanned portion is selectively discharged to lower the potential, and the output pattern formed by the potential difference is an electrostatic latent image.

On the other hand, the toner is supplied to the developing roller 12 to which the developing bias is applied by the supply roller 14. The toner adhered to the outer circumference of the developing roller 12 is thinned to a uniform thickness by the toner layer regulating member 16. At this time, the toner is charged while being rubbed by the developing roller 12 and the toner layer regulating member 16. The toner attached to the outer circumference of the developing roller 12 is attached to the electrostatic latent image formed on the outer circumference of the photosensitive drum 11, and cyan and magenta are respectively attached to the photosensitive drums 11 of the developing cartridges 10C, 10M, 10Y and 10K, respectively. Toner images of yellow and black colors are formed.

The recording medium is withdrawn from the cassette 70 by the pick-up roller 72. The recording medium is drawn into the conveyance belt 20 by the conveying roller 74. The recording medium is attached to the surface of the conveyance belt 20 by an electrostatic force and conveyed at the same speed as the traveling line speed of the conveyance belt 20. For example, the front end of the recording medium in accordance with the point where the tip of the cyan (C) color toner image formed on the outer peripheral surface of the photosensitive drum 11 of the developing cartridge 10C reaches the transfer nip facing the transfer roller 40. This transfer nip is reached.

When a transfer bias is applied to the transfer roller 40, the toner image formed on the photosensitive drum 11 is transferred onto the recording medium. As the recording medium is transferred, toner images of magenta (M), yellow (Y), and black (K) colors formed on the photosensitive drums 11 of the developing cartridges 10M, 10Y, and 10K are sequentially transferred to the recording medium. As a result, a color toner image is formed on the recording medium.

The toner remaining on the outer circumferential surface of the photosensitive drum 11 after the transfer is removed by the cleaning member 18. The decal unit (not shown) removes curl from the recording medium in which curl is generated when passing through the fixing unit 50. The recording medium passing through the decal portion is discharged out of the image forming apparatus by the discharge roller 76. The recording medium discharged from the discharge roller 76 along the recording medium transfer path 80 is loaded into the loading unit 90.

As described above, according to the related art, when the recording medium discharged from the discharge roller 76 is loaded on the loading unit 90, the recording medium performs free fall motion after discharge. Therefore, the alignment of the recording medium loaded on the stacking unit 90 is not uniform. In this case, the user may sort, but in the case of outputting a large amount of documents, it is difficult for the user to sort one by one.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrophotographic image forming apparatus having a loading unit that can be aligned and stacked without scattering the output when a large amount of documents are output.

An electrophotographic image forming apparatus according to the present invention includes a stacking unit for discharging and stacking a recording medium from a printing unit; A first guide part provided at a first position of the loading part and aligning the recording medium in a first direction parallel to a traveling direction of the recording medium; A second guide part provided at a second position of the loading part and arranged in a second direction substantially perpendicular to the first direction to align the leading end of the recording medium; It is characterized by including.

The first guide part includes a first member and a second member provided in the loading part in parallel with a traveling direction of the recording medium, wherein the first member and the second member have a plane parallel to the loading part. It is preferable that the posture can be changed in the vertical direction.

Preferably, the first member and the second member are provided with a coupling portion hinged to the loading portion at a predetermined position, and are provided to be rotatable by the coupling portion.

It is preferable that the coupling part has a plurality, and the loading part is provided with a transfer path in which one side of the coupling part is rotated.

Preferably, the second guide portion may be changed in posture in a direction parallel to or perpendicular to the loading portion, and may be provided to be movable in the advancing direction of the recording medium.

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

Figure 4 schematically shows an electrophotographic image forming apparatus according to a preferred embodiment of the present invention, Figure 5 shows a developing cartridge, Figure 6 shows a loading portion, Figure 7 is an exploded perspective view showing the loading portion. Although the electrophotographic image forming apparatus of this embodiment has taken a color image forming apparatus as an example, the present invention is not limited to the color image forming apparatus.

Referring to FIG. 4, the electrophotographic image forming apparatus includes a printing unit 160 for printing an image on a recording medium by an electrophotographic process, a cassette 170 on which the recording medium is loaded, and a recording medium from the cassette 170. A pick-up roller 172 for drawing out and a feed roller 174 for feeding the recording medium.

The printing unit 160 includes four toners each containing toners of different colors, for example, C: cyan, M: magenta, Y: yellow, and black: K. The developing cartridge 110C, 110M, 110Y, 110K, the conveyance belt 120, the exposure part 130C, 130M, 130Y, 130K), the transfer roller 140, and the fixing part 150 are included.

The conveyance belt 120 is supported by a plurality of support rollers 121, 122, 123, and 124 to circulate. The conveyance belt 120 in this embodiment is installed in the vertical direction. Each of the exposure units 130C, 130M, 130Y, and 130K is configured to generate light corresponding to image information of cyan, magenta, yellow, and black colors. According to the signal is irradiated to the photosensitive drum 111 of each developing cartridge (110C, 110M, 110Y, 110K). In this embodiment, a laser scanning unit (LSU) using a laser diode as a light source is employed as the exposure units 130C, 130M, 130Y, and 130K.

Referring to FIG. 5, each of the developing cartridges 110C, 110M, 110Y, and 110K includes a photosensitive drum 111, a developing roller 112, a charging roller 113, a supply roller 114, a regulating member 116, and a cleat. It includes a ning member 118 and the storage unit 119. The photosensitive drum 111 is installed to expose a portion of its outer circumferential surface and rotates in a predetermined direction, and a photoconductive material layer is coated on the outer circumference of the metal drum. The charging roller 113 is applied with a charging bias to charge the outer circumference of the photosensitive drum 111 to a uniform electric potential. Instead of the charging roller 113, a corona discharger (not shown) may be employed. The developing roller 112 attaches toner to its outer circumference and supplies the toner to the photosensitive drum 111. The developing roller 112 contains solid powder toner, and supplies these toners to the electrostatic latent image formed on the photosensitive drum 111 to develop the toner image. A developing bias for supplying these toners to the photosensitive drum 111 is applied to the developing roller 112. The developing roller 112 used in this embodiment used a developing roller coated with nickel (Ni) by sandblasting the aluminum (Al) core. It is also possible to use a stainless steel shaft with a rubber thickness of about 1.0 mm.

On the outside of the developing roller 112, a supply roller 114 for attaching toner to the developing roller 112 and a toner layer regulating member 116 for regulating the amount of toner attached to the developing roller 112 are frame 100. Installed in

Each developing cartridge 110C, 110M, 110Y, 110K may further include an agitator (not shown) for transferring the toner contained therein to the feed roller 114 and / or the developing roller 112.

The cleaning member 118 is installed in the frame 100, and one end of the cleaning member 118 contacts the photosensitive drum 111 with a predetermined pressure so as to scrape the toner remaining in the photosensitive drum 111 after transfer. . The cleaning member 118 may be installed on a support member (not shown) fixed to the frame 100 and one end thereof. The other end of the cleaning member 118 contacts the photosensitive drum 111 with a predetermined pressure to contact the photosensitive drum 111 so as to scrape the toner remaining in the photosensitive drum 111 after the transfer. The storage unit 119 is provided inside each of the developing cartridges 110C, 110M, 110Y, and 110K to store the toner removed from the photosensitive drum 111 by the cleaning member 118.

The developing cartridges 110C, 110M, 110Y, and 110K of the present embodiment have an opening 117 that forms a passage so that light scanned by the exposure units 130C, 130M, 130Y, and 130K can be irradiated to the photosensitive drum 111. It is provided. The outer circumferential surface exposed to the outer circumference of the photosensitive drum 111 faces the conveyance belt 120.

Four transfer rollers 140 are disposed at positions facing the photosensitive drums 111 of each of the developing cartridges 110C, 110M, 110Y, and 110K with the conveyance belt 120 interposed therebetween. In this embodiment, the transfer roller 140 is applied with a transfer bias of a polarity opposite to that of the toner image so that the toner image developed on the photosensitive drum 111 is transferred to the recording medium. The toner image is transferred to the recording medium by the electrostatic force acting between the photosensitive drum 111 and the transfer roller 140.

The fixing unit 150 includes a heating roller 151 and a pressure roller 152, and fixes the toner image to the recording medium by applying heat and pressure to the toner image transferred to the recording medium. The heating roller 151 is installed so as to be opposed to the pressure roller 152 in the axial direction as a heat source for permanently fixing the toner image. The pressure roller 152 is installed to face the heating roller 151 to apply a high pressure to the recording medium to fix the toner image onto the recording medium.                     

The decal unit (not shown) removes curl of a recording medium in which curl is generated by heat while passing through the fixing unit 150. The discharge roller 176 discharges the recording medium on which the fixing is completed, out of the electrophotographic image forming apparatus. The recording medium discharged from the discharge roller 176 along the recording medium transfer path 180 from the printing unit 160 is loaded in the loading unit 190.

6 and 7, the loading part 190 is provided with a first guide part 200 and a second guide part 210. The first guide part 200 is provided at a first position of the loading part 190 to align the recording medium in a first direction parallel to the advancing direction of the recording medium. The second guide portion 210 is provided at the second position of the loading portion 190, and is preferably disposed in a second direction substantially perpendicular to the first direction, that is, substantially perpendicular to the traveling direction of the recording medium. Do. The second guide portion 210 aligns the leading end of the recording medium.

The first guide part 200 preferably includes a first member 201 and a second member 205 provided in the loading part 190 in parallel with the traveling direction of the recording medium. It is preferable that the first member 201 and the second member 205 are installed in such a manner that their planes can be changed in a direction parallel to or perpendicular to the mounting portion 190. That is, it is preferable that the first member 201 and the second member 205 are foldable to the mounting portion 190.

The first member 201 and the second member 205 may include coupling parts 300 and 303 hinged to the loading part 190 at a predetermined position. In this embodiment, the case in which the two coupling parts 300 and 303 are provided as an example, but the coupling part of the present invention is not limited thereto. That is, there may be one coupling part, or there may be a plurality of coupling parts, and the coupling part and the loading part 190 are not limited thereto. The mounting portion 190 is provided with coupling holes 305 and 306 engaged with the coupling portions 300 and 303 of the first member 201 and the second member 205. In the present embodiment, the case in which the two coupling holes 305 and 306 are provided is described as an example, but the coupling hole of the present invention is not limited thereto. That is, there may be one coupling hole or there may be a plurality of coupling holes. The first member 201 is provided with coupling parts 300 and 303 coupled to the loading part 190, and ends 301 and 304 of the first member 201 are combined with the loading part 190. In the present embodiment, the ends 301 and 304 of the coupling parts 300 and 303 are circular, but the present invention is not limited thereto, and various coupling shapes may be possible. The first member 201 is preferably installed to be rotatable in the direction A as shown in Fig. 6 so that the recording medium of various specifications can be aligned in the first direction parallel to the advancing direction of the recording medium. Since the configuration of the second member 205 is also the same as that of the first member 201, a detailed description thereof will be omitted.

In this embodiment, a case in which two coupling holes 305 and 306 are provided in the loading unit 190 will be described as an example. The mounting portion 190 is provided with coupling holes 305 and 306 to engage and rotate the first member 201 and the second member 205. The first coupling hole 305 is coupled with the coupling portion 300 provided on one side of the first member 201, the second coupling hole 306 is the coupling portion 303 provided on the other side of the first member 201. Combined with. The loading part 190 is provided with a transfer path 307, and the coupling part 303 provided on the other side of the first member 201 is rotated along the transfer path 307. In the present embodiment, the first member 201 is rotated along the transfer path 307 of the coupling portion 303 provided on the other side, but the present invention is not limited thereto, and each of the coupling portions 300 and 303 may be a loading portion 190. There are various modifications that can be carried out, such as when feeding side by side along the transport path provided in the). The configuration of the second member 205 is also the same as that of the first member 201, and the operation is also the same.

The second guide portion 210 is installed in such a manner that its plane can be changed in a direction parallel to or perpendicular to the mounting portion 190. In this embodiment, the case in which the two coupling parts 350 and 353 are provided as an example, but the coupling part of the present invention is not limited thereto. That is, there may be one coupling portion or a plurality of coupling portions. The mounting portion 190 is provided with coupling holes 352 and 355 engaged with the coupling portions 350 and 353 of the second guide portion 210. In this embodiment, the case in which the two coupling holes 352 and 355 are provided as an example, but the coupling hole of the present invention is not limited thereto. That is, there may be one coupling hole or there may be a plurality of coupling holes. The second guide portion 210 is coupled to the two coupling holes 352 and 355 provided at the end portions 351 and 354 of the coupling portion 350 and 353 in the loading portion 190, respectively. In the present embodiment, the ends 351 and 354 of the coupling parts 350 and 353 are circular, but the present invention is not limited thereto. The second guide portion 210 is preferably installed to be movable in the direction B, which is the recording medium transfer path 180, as shown in FIG. The mounting part 190 is provided with coupling holes 352 and 355 to which the second guide part 210 is coupled. The second guide part 210 is moved in the B direction along the transport path 356 provided in the loading part 190.

Hereinafter, the operation of the electrophotographic image forming apparatus according to the present invention will be described.

The photosensitive drums 111 of each of the developing cartridges 110C, 110M, 110Y, and 110K are charged at a uniform potential by the charging bias applied to the charging roller 113. The four exposure units 130C, 130M, 130Y, and 130K respectively emit light corresponding to the image information of cyan, magenta, yellow, and black colors through the openings 117 of each of the developing cartridges 110C, 110M, 110Y, and 110K. Irradiate with a photosensitive drum (111). When light is scanned, only the scanned portion is selectively discharged to lower the potential, and the output pattern formed by the potential difference is an electrostatic latent image.

On the other hand, the toner is supplied to the developing roller 112 to which the developing bias is applied by the supply roller 114. The toner adhered to the outer circumference of the developing roller 112 is thinned to a uniform thickness by the toner layer regulating member 116. At this time, the toner is charged while being rubbed by the developing roller 112 and the toner layer regulating member 116. The toner attached to the outer circumference of the developing roller 112 is attached to the electrostatic latent image formed on the outer circumference of the photosensitive drum 111. The toners of the developing cartridges 110C, 110M, 110Y, and 110K are respectively cyan and magenta. Toner images of yellow and black colors are formed.

The recording medium is withdrawn from the cassette 170 by the pickup roller 172. The recording medium is drawn into the conveyance belt 120 by the conveying roller 174. The recording medium is attached to the surface of the conveyance belt 120 by an electrostatic force and conveyed at the same speed as the traveling line speed of the conveyance belt 120. For example, the tip of the recording medium in accordance with the point where the tip of the cyan (C) color toner image formed on the outer circumferential surface of the photosensitive drum 111 of the developing cartridge 110C reaches the transfer nip facing the transfer roller 140. This transfer nip is reached.

When a transfer bias is applied to the transfer roller 140, the toner image formed on the photosensitive drum 111 is transferred to the recording medium. As the recording medium is transferred, toner images of magenta (M), yellow (Y), and black (K) colors formed on the photosensitive drums 111 of the developing cartridges 110M, 110Y, and 110K are sequentially transferred to the recording medium. As a result, a color toner image is formed on the recording medium.

The toner remaining on the outer circumferential surface of the photosensitive drum 111 after the transfer is removed by the cleaning member 118. The fixing unit 150 applies heat and pressure to the color toner image formed on the recording medium after transfer to fix the toner image to the recording medium. The decal unit (not shown) removes curl from the recording medium in which curl is generated when passing through the fixing unit 150. The recording medium passing through the decal portion is discharged out of the image forming apparatus by the discharge roller 176. The recording medium discharged from the discharge roller 176 along the recording medium transport path 180 is loaded in the loading unit 190.

Hereinafter, operations of the first guide part 200 and the second guide part 210 of the loading part 190 on which the discharged recording medium is loaded will be described in detail.

8A and 8B are side views illustrating an operation of changing the posture of the first guide unit with respect to the loading unit, and FIG. 9 illustrates an operation of folding the first guide unit and the second guide unit, and FIG. The two guide parts rotate and move.

8A and 8B, the user may change the posture of the first guide part 200 in a direction perpendicular to the loading part 190 when the document is output in large quantities. The loading unit 190 may serve as a support when the first guide unit 200 is erected as shown in FIG. 8B. The user may change the posture of the first guide part 200 and the second guide part 210 as necessary, as shown in FIG. 9. As shown in FIG. 10, by automatically adjusting the first guide part 200 or the second guide part 210 in the A direction or the B direction, automatic alignment is possible for recording media of various standards.                     

According to the above-described configuration, the present invention can automatically arrange the recording media of various standards unlike the conventional invention.

As described above, in the electrophotographic image forming apparatus according to the present invention, the output is automatically aligned by the first guide portion and the second guide portion. Accordingly, the present invention provides a printout sorting device that has not been provided in the conventional image forming apparatus, thereby eliminating the need for the user to rearrange the printouts when a large amount of documents are output, thereby increasing user convenience. In addition, by rotating and moving the first guide portion and the second guide portion, automatic alignment is possible for recording media of various standards.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Claims (5)

A stacking unit for discharging and stacking the recording medium from the printing unit; A first guide part provided at a first position of the loading part and aligning the recording medium in a first direction parallel to a traveling direction of the recording medium; A second guide part provided at a second position of the loading part and arranged in a second direction substantially perpendicular to the first direction to align the leading end of the recording medium; Electrophotographic image forming apparatus comprising a. The method of claim 1, The first guide unit, A first member and a second member provided in the stacking portion in parallel with a traveling direction of the recording medium; And the first member and the second member are installed in such a manner that their planes can be changed in a direction parallel to or perpendicular to the loading portion. The method of claim 2, And the first member and the second member have a coupling portion hinged to the loading portion at a predetermined position, and are rotatably installed by the coupling portion. The method of claim 3, The coupling portion is a plurality, The loading part has an electrophotographic image forming apparatus, characterized in that the conveying path is rotated one side of the coupling portion. The method according to any one of claims 1 to 4, And the plane of the second guide portion can be changed in posture in a direction parallel to or perpendicular to the stacking portion, and is movable so as to move in a direction of travel of the recording medium.

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