KR930012268B1 - Image forming apparatus - Google Patents

Abstract

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Description

Image forming apparatus

1 is a schematic cross-sectional view showing a state in which a cover body is in an open position and an auxiliary receiver is in a first position as one embodiment of a laser beam printer as an example of the chemical forming apparatus according to the present invention.

FIG. 2 is a plan view showing the cover body of the laser beam printer of FIG.

3 is a schematic cross-sectional view showing a state in which the cover body of the laser beam printer of FIG. 1 is in the closed position and the auxiliary receiving body is in the second position.

4 is a schematic cross-sectional view showing a modification of the laser beam printer.

* Explanation of symbols for main parts of the drawings

2: forming apparatus main body 3: supply means

4: sorter 6: housing

12: opening and closing housing 18: rotating drum

24: developing device 26: transfer corona discharger

32: transcription zone 38: optical unit

56 conveying mechanism 130 bin tray

148: connecting piece 151: receiving part

158, 202: auxiliary body 176: cover body

The present invention relates to an image forming apparatus such as a laser beam printer.

Background Art [0002] Conventionally, an image forming apparatus such as a laser beam printer includes a forming apparatus main body for forming an image on the surface of a sheet member, such as a recording sheet, and a supply means for supplying the sheet member to a conveying path of the forming apparatus main body while being conveyed through the conveying path. There exists a sorter which sorts the sheet member discharged | emitted from the conveyance path | route.

In general, the forming apparatus main body transfers image bearing means such as a rotating drum having a photosensitive member on the surface, image forming means for forming a toner image on the surface of the photosensitive member, transfer means disposed in the transfer zone, and sheet member. The conveyance mechanism which defines the conveyance path conveyed through an area | region, and the receiving part which receives the sheet member discharged | emitted from a conveyance path | pass are provided.

Further, the supply means is provided with a supply roller for supplying the sheet members one by one toward the conveyance path. The sorter is provided with a plurality of bin trays arranged in the vertical direction. However, in the conventional image forming apparatus, the supply means is disposed on one side of the main body of the forming apparatus, and the sorter is arranged on the other side of the main body of the forming apparatus so that the sheet member supplied from the supply means is almost straight, so that the conveying path of the main body of the forming apparatus is maintained. It is intended to be introduced into sorter by means of a defect, which requires a relatively large space to install the whole device.

On the other hand, in order to reduce the installation space of the whole apparatus, it is also proposed to arrange the sorter on the upper part of the forming apparatus main body, for example, a so-called shell that allows the upper housing to be opened and closed with respect to the housing. It is very difficult to adopt a shell type support structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its main object is to provide an improved image forming apparatus which can install the whole apparatus with a relatively small installation space and which can be easily adopted as a cellular support structure. A specific example of the image forming apparatus according to the present invention will be described with reference to the accompanying drawings.

[1st specific example]

A first specific example of the image forming apparatus will be described with reference to FIGS. 1 to 3. The laser beam printer shown in FIG. 1 and FIG. 2 which shows a laser beam printer as an example of an image forming apparatus has the forming apparatus main body shown in the number (2), the supply means shown by the number (3), and the number (4). ), A supply means 3 and a sorter 4 are attached to the support unit body 5. The forming apparatus main body 2 has a substantially rectangular parallelepiped housing 6, which is composed of a lower housing 8, an upper housing 10, and an opening and closing housing 12.

The opening and closing housing 12 is mounted to the upper housing 10 so as to be able to pivot between an open position (not shown) and a closed position (positions shown in FIGS. 1 to 3). The process unit 14 is disposed almost at the center of the housing 6. The illustrated process unit 14 has a unit frame 16 detachably mounted in the housing 6, in which the rotating drum 18 constituting the counseling means is rotatably mounted. It is.

An electrostatic photosensitive member is disposed on the peripheral surface of the rotating drum 18. Around the rotating drum 18 rotated in the direction indicated by the arrow 20, the corona discharger 22 for charge, the developing device 24, the transfer corona discharger 26 constituting the transfer means and the cleaning device 28 are provided. The corona discharger 22, the developing device 24, and the cleaning device 28 are mounted to the unit frame 16. The charging corona discharger 22 charges the photosensitive member on the rotating drum 18 to a specific polarity.

The developing apparatus 24 includes a magnetic brush mechanism 30 and develops the electrostatic latent image formed as described later in a toner image. In addition, the corona discharger 26 for transfer disposed in the transfer zone 32 performs corona discharge on the back surface of the sheet member conveyed through the conveyance path 69 as described later.

The cleaning apparatus 28 includes an elastic bleed 34 acting on the surface of the photoconductor and removes the toner remaining on the surface of the photoconductor and recovers it in the toner recovery chamber 36. An optical unit 38 is arranged above the housing 6, ie above the process unit 14. The illustrated optical unit 38 is provided with a box-shaped unit housing 40. The housing 40 has a laser light source (not shown), a rotating face mirror 42 rotating in a predetermined direction, and a first imaging. The lens 44, the second imaging lens 46, the first reflecting mirror 48, the second reflecting mirror 50, and the cylindrical lens 52 are disposed. A laser light source (not shown) irradiates the laser beam by the image information output from a computer toward the rotating polygon mirror 42, for example. The laser light reflected by the rotating polygon mirror 42 is passed through the first imaging lens 44 and the second imaging lens 46 to the first reflecting mirror 48 as shown in the solid line image table in FIG. This is reflected by the first reflector 48 and the second reflector 50 and then projected to the surface of the rotating drum 18 in the projection zone 54 through the cylindrical lens 52.

At the lower part of the housing 6, that is, the lower part of the process unit 14, the conveyance mechanism which shows the whole number 56 is arrange | positioned. The illustrated conveying mechanism 56 includes a pair of conveying rollers 58, a guide plate 60, a guide plate 62, a pair of fixing rollers 64, a guide ring 66, and a pair of conveying rollers 68. And the main part of the conveyance path 69 which conveys a sheet member like a recording paper by these.

In the specific example, the upstream end part of the conveyance path 69 is divided into two, the branched one is extended to the right side in a straight state, and the opening opening 70 which introduces a sheet member is defined by the upstream end part. Thus, the sheet member supplied as described later by the supply means 3 is introduced into the housing 6 through the introduction opening 70 and the wall 74 of the guide plate 72 and the lower surface and the lower body housing 8. It is guided to the conveying roller 58 through the upper edge of the guide protrusion 76 formed on the inner surface of the. In addition, the other side of the upstream end of the conveyance path 69 is bent and extends downward, and the upstream end thereof, that is, in detail, below the conveying mechanism 56 and at the bottom of the housing 6, an automatic feeding means 78 is provided. It is arranged. The illustrated automatic feeding means 78 has a cassette 84 to which the site members are mounted in a stacked state. This cassette 84 is defined at the bottom of the housing 6 via an opening 86 defined on the left side in the first and second views of the housing 6, in particular the lower housing 8. Is detachably mounted to the cassette receiver. The feed roller 90 is arranged above the cassette holder 88.

As a result, the sheet roller in the cassette 84 is fed out one by one as the feed roller 90 is rotated in the direction indicated by the arrow 92. The sheet member thus fed is formed in the wall 94 of the lower housing 8. The guide protrusion 96 and the guide protrusion 76 of the wall 74 are guided to the pair of conveying rollers 58. The downstream end of the conveying path 69 is also branched in two, and in this regard, a part of the opening / closing housing 12, that is, the opening part 98 is shown in FIG. 1 in the first position and in FIG. It is attached so that pivoting is possible between the 2nd position shown by a dotted line. When the opening and closing portion 98 is in the first position, the sheet member supplied by the pair of conveying rollers 68 is conveyed upward again and passes between the opening and closing portion 98 and the wall 100 of the opening and closing housing 12. Guided to the pair of discharge rollers 102, it is discharged to the outside of the housing 6 by the action of the pair of discharge rollers 102. On the other hand, when the opening and closing portion 98 is in the second position, the sheet member supplied by the pair of conveying rollers 68 is discharged directly to the outside of the housing 6 without being conveyed upwards, so that the inner surface of the opening and closing portion 98 is It is accepted in (the upper surface in the state shown by the two-dot chain line). The illustrated supply means 3 is configured as a unit and is detachably mounted to the bottom of the support unit body 5. The supply means 3 is provided with a supply housing 104, and a cassette receiving portion 106 is defined in the supply housing 14. On the upper side of the cassette receiving portion 106, a supply roller 110 which is rotated in the direction indicated by the arrow 108 is disposed. In Fig. 1 of the supply housing 104, a mounting opening 112 is defined on the right side, and the box-shaped cassette 114 is detachably mounted to the cassette receiving unit 106 through the mounting opening 112. . The cassette 114 is equipped with a mounting plate 116 which is biased upwards with the rear end as a point by the action of a biasing means (not shown) such as a spring, and is stacked on the mounting plate 116. The member is loaded as needed. A delivery opening 118 is defined on the left side in FIG. 1 of the support unit body 5 along the supply housing 104. Between the delivery opening 118 and the cassette receiving section 106, guide plates 120 and 122 defining a delivery route are arranged. In addition, the illustrated sorter 4 is also configured as a unit and is detachably mounted on the upper portion of the support unit body 5. The sorter 4 includes a sorter housing 128 having a bottom wall 124 and a pair of side walls 126 (FIG. 2) extending upward from the bottom wall 124.

A plurality of bin trays 130 are disposed between the pair of side walls 126 at intervals in the vertical direction.

One end (left end in FIGS. 1 and 2) of the bin tray 130 is supported to be movable in the vertical direction by the support pillar 132, and the other end (right end in FIGS. 1 and 2) is provided. It is supported by the support protrusion 136 of the support member 134. At one end of the bin tray 130, another elevating mechanism is omitted. The lifting mechanism moves one end of the plurality of bin trays 130 upward or downward in order. An introduction opening 138 is defined on the left side in FIGS. 1 and 2 of the support unit body 5 along the sorter 4, and the sheet member introduced as described below through the introduction opening 138. It is accepted somewhere in the plurality of bin trays 130 through the introduction path defined by the pair of guide plates 140, the pair of introduction rollers 142, and the pair of guide plates 144.

The support unit body 5 has a pair of substrates 146 (only one of them shown in FIG. 1) arranged at intervals, and the supply means 3 is mounted between the bottoms of the pair of substrates 146. The sorter 4 is mounted between the upper portions of the substrates 146. This support unit body 5 is arranged on one side (right side in FIGS. 1 and 2) of the forming apparatus main body 2, as shown in FIGS. 1 and 2, and has a lower housing ( 8) is releasably connected. In detail, in FIG. 1 and FIG. 2 of the support unit body 5, a pair of engaging pieces 148 (refer FIG. 2) is provided in the left end part. A locking opening 150 is formed at a predetermined portion of the wall 74 of the lower main body housing 8 to correspond to the pair of locking pieces 148.

Since it is comprised in this way, each locking piece 148 is inserted through the locking opening 150, and the hook part 148a (FIG. 1) is attached to the site | part which defines the locking opening 150 of the wall 74. As shown in FIG. The support unit 5 is detachably mounted by engaging. In such a mounting state, the delivery opening 118 prescribed by the support unit body 5 and the introduction opening 70 defined by the housing 6 are connected as necessary, and further defined on the upper side of the housing 6 as described later. The supply path to the sorter 4 to be used and the introduction opening 138 defined in the support unit body 5 are connected as necessary.

In the specific example, since the support unit 5 is mounted on one side of the forming apparatus main body 2, in other words, the supply means 3 and the sorter 4 are arranged on the one side. As can be seen, the entire apparatus becomes relatively compact, and the installation space may be relatively small. In addition, it is also possible to easily adopt a so-called cellular support structure which opens a part of the housing 6 upward as in the specific example.

Referring to Figure 1 will be described the operation of the laser beam printer as follows. While the rotating drum 18 is rotated in the direction indicated by the arrow 20, the charging corona discharger 22 charges the photosensitive member of the rotating drum 18, and then the optical unit 38 in the projection zone 54. Laser light from a laser source (not shown) is projected onto the photoconductor to form an electrostatic latent image corresponding to image information on the surface of the photoconductor.

Thereafter, the magnetic brush mechanism 30 of the developing apparatus 24 performs toner processing on the electrostatic latent image on the photosensitive member to develop the electrostatic latent image into the toner image, and thus the charging corona discharger 22, the optical unit 38, and the like. The toner image is formed on the rotating drum 18 by the action of the image forming means of the developing apparatus 24. Subsequently, the sheet member supplied to the conveying path 69 from the supply means 3 or the automatic supply means 78 mounted on the support unit body 5 is in contact with the photosensitive member in the transfer zone 32. In addition, when the sheet member is supplied from the supply means 3, the feed roller 110 is rotated in the direction indicated by the arrow 108, and the sheet member discharged from the cassette 114 by the action of the feed roller 110. Is supplied to the conveyance path 69 through the delivery opening 118 and the introduction opening 70 through the guide plates 120 and 122.

In the transfer zone 32, the toner image on the photoconductor is transferred to the sheet member by the action of the transfer corona discharger 26. The sheet member to which the toner image is transferred is peeled off the rotating drum 18, and then conveyed to a pair of fixing rollers 64, and the toner image is fixed to the surface of the sheet member by the action of the pair of fixing rollers 64. The sheet member on which the toner image is fixed is conveyed to the pair of conveying rollers 68, and is discharged onto the opening and closing portion 98 as it is when the opening and closing portion 98 is in the second position.

When the sheet member is discharged on the opening / closing part 98, as shown in FIG. 1, the sheet-formed surface is discharged upward. On the other hand, when the opening-closing part 98 is in the said 1st position, the sheet member conveyed to the pair of conveying rollers 68 is conveyed upwards again between the opening-closing part 98 and the wall 100, and a pair of By the action of the discharge roller 102 is discharged toward the receiving portion 151, which is defined on the upper surface of the housing 6, that is, the opening and closing housing 12 in detail.

When the sheet member is discharged toward the receiving portion 151, as shown in FIG. 1, the sheet-shaped surface is discharged downward.

Thus, the sheet member discharged to the pair of discharge rollers 102 is selectively received by the receiving portion 151 as described later, and is supported on the upper side of the housing 6 past the supply path defined as described later. It is introduced into the introduction opening 138 of the unit body 5. On the other hand, the rotating drum 18 continues to rotate repeatedly, and the toner remaining on the photosensitive member is removed by the action of the cleaning device 28. Next, with reference to FIG. 3 along with FIG. 1 and FIG. 2, the receiving part 151 provided in the opening-and-closing housing 12 and the element related to it are demonstrated. In the embodiment, the receiving part 151 is the wall 100 extending upward, and the inclined top wall 152 extending obliquely upward from the lower end of the wall 100 toward the right in FIGS. 1 to 3. First to second views of the forming apparatus main body 2 are provided with a receiving surface defined by an almost triangular wall 154 existing on both sides of the upper wall 152 and defined by an upper surface of the inclined upper wall 152. The left end at 3 degrees, that is, the end where the pair of discharge rollers 102 are arranged, extends in a straight line to be inclined almost 45 degrees upward by performing the right end at the first to third degrees. On the upper surface of the inclined top wall 152, a plurality of protrusions 156 are integrally formed at intervals in the vertical direction and the vertical direction in Fig. 2 in Figs. An auxiliary receiving body 158 is disposed at the right end of the receiving part 151, in other words, at the upper end of the inclined upper wall 156. The auxiliary receiving body 158 shown is composed of a plate-shaped member 160, the support protrusions 162 (only one side shown in Figs. 1 and 3) installed on both ends of the plate-shaped member 160 pin 164 It is attached to the upper end of the inclined top wall 152 so that it can turn in the direction shown by the arrow 166 and 168 (FIG. 1). In the specific example, as shown in FIG. 2, the base of the plate-shaped member 160 is formed with a plurality of elongated notches 170 corresponding to the protrusion 156 formed on the inclined upper wall 152, and also has a plate shape. A pair of triangular support guide protrusions 172 are formed on the right side of the member 160 in a first direction and in a vertical direction on the ground in FIG. .

As shown in FIG. 1, the auxiliary receiving body 158 of this configuration has an arrow (a) as the support surface 172a of the pair of support guide protrusions 172 abuts against the upper wall 174 of the opening and closing housing 12. The first position at which the pivoting motion in the direction indicated by 166 is reliably prevented, and the bottom of the notch 170 formed in the plate-like member 160 as shown in FIG. 2 and FIG. 3 are protrusions of the inclined top wall 152. Since it touches 156, it can turn between the 2nd positions which the rotational motion of the direction shown by the arrow 168 is reliably interrupted. Therefore, when in the above-described first position, the auxiliary receiving body 158 is located on the downstream side of the sheet member discharge direction of the receiving part 151, and one side thereof (left side in Fig. 1) is an inclined upper wall ( From the upper end of the upper surface of 152, it extends obliquely straight upwards upwards to the right in FIG. On the other hand, when in the second position, the auxiliary receiving body 158 is located above the upper end of the receiving part 151, the other surface (the surface on which the supporting guide protrusion 172 is formed), in particular, the supporting guide protrusion 172 The guide surface 172b of) extends inclined in a straight line upwards to the right in FIG. 3 above the inclined top wall 152. The cover body 176 for covering the receiving part 151 is attached to the apparatus main body 2, namely, the opening / closing housing 12 (the cover body 176 is not shown in FIG. 2). The cover body 176 shown in figure is a plate shape, and the center part of the left-right direction is slightly curved in FIG. Protrusions 178 are provided on both ends of the base of the cover body 176, and the protrusions 178 are rotatably mounted through the pins 180 (FIG. 2). A junction 182 is provided at the free end of the cover 176, and a grip projection 184 is formed at the tip of the junction 182. Therefore, the cover body 176 can be easily rotated in the directions shown by the arrows 186 and 188 (FIG. 1) by holding the above-mentioned holding protrusion 184 by hand. When the top surface of the cover body 176 is rotated in the direction indicated by the arrow 186 to the open position shown in FIG. 1, the top surface of the cover body 176 is in contact with a part of the support unit body 5 while the arrow ( The turning motion in the direction indicated by 186 is reliably prevented, and the upper part of the receiving part 151 is opened as necessary. On the other hand, when the cover body 176 is rotated in the direction indicated by the arrow 188 to the closed position shown in FIG. 3, the joint 182 of the cover body 176 fits the wall 190 of the opening / closing housing 12. As it touches, the turning movement in the direction indicated by the arrow 188 is reliably prevented, and the upper part of the receiving part 151 is covered so that the receiving part 151 is not exposed to the outside. When the sheet member is guided to the sorter 4 in the laser beam printer, as shown in FIG. 3, the auxiliary receiving body 158 is positioned at the second position, and the cover body 176 is at the closed position. Is positioned on. In this state, the guide surface 172b of the support guide protrusion 172 of the auxiliary receiving body 158 extends inclined upwardly toward the top wall 174 in the opening / closing housing 12. In addition, the cover body 176 extends almost horizontally from the wall 190 to the stomach wall 174 above the auxiliary body 158. Therefore, as shown in FIG. 3, the supply path for guiding the sheet member to the sorter 4 above the housing 6, that is, above the receiving portion 151 is defined, and the lower side of the supply path is supported. The guide surface 172b of the guide protrusion 172 and the top surface of the wall 174 in the opening / closing housing 12 are defined, and the upper side of the supply path is defined by the inner surface of the cover body 176. Therefore, the sheet member discharged from the pair of discharge rollers 102 is led from the left end of the housing 6 toward the right end through the supply path to the introduction opening 138 of the sorter 4.

By guiding the sheet member in this manner, the auxiliary receiving body 158 acts as a lower guide means for guiding the sheet member to the sorter 4, and the cover body 176 also has an upper portion for guiding the sheet member to the sorter 4. It acts as a guide. Further, more support guide protrusions 172 may be provided on the other side of the auxiliary receiving body 158 so that the conveyance of the sheet member can be performed more reliably. In the state shown in FIG. 3, the auxiliary receiver 158 is accommodated in the receiver 151 as necessary, and the cover body 176 covers the upper part of the receiver 151 so that the forming apparatus main body becomes compact. At the same time, dust is effectively prevented from adhering to the receiving part 151. On the other hand, when receiving the sheet member discharged from the pair of discharge rollers 102 into the receiving portion 151, as shown in FIG. 1, the cover body 176 is positioned in the open position, and the auxiliary receiving body 158 is positioned at the first position.

When the cover body 176 is rotated in the direction indicated by the arrow 186 and positioned in the open position, the base of the cover body 176 blocks the introduction opening 138 defined in the support unit body 5 so that the opening opening is made. The introduction of the sheet member leading to 138 is prevented. When the cover body 176 is in the open position, the upper part of the receiving part 151 is opened to allow positioning of the auxiliary receiving body 158 to the first position.

Then, when the auxiliary support body 158 is rotated in the direction indicated by the arrow 166 and positioned at the first position, the auxiliary receiver 158 is in the state shown in FIG. That is, the plate-shaped member 160 of the auxiliary receiving body 158 extends obliquely upward from the upper end of the inclined upper wall 152 again, and the upper surface cooperates with the upper surface of the inclined upper wall 152 to receive the sheet member. To regulate. Therefore, the sheet member discharged from the pair of discharge rollers 102 abuts on the bottom surface of the receiving portion 151 and moves upward along the bottom surface. And the sheet | seat member discharged | emitted to the receiving part 151 in this way is moved downward along the receiving surface of the receiving part 151, and the rear end part is neatly arranged as the rear end part contacts the wall 100. In this way, it functions as an auxiliary receiving part downstream from the receiving part 151, and one side thereof defines the receiving surface in cooperation with the upper surface of the inclined upper wall 152, and thus the above-mentioned sheet member It is accepted as needed for the receiving part 151.

[Modification]

Next, with reference to FIG. 4, the modification of a laser beam printer is demonstrated. In addition, in FIG. 4, the member same as the member shown in FIGS.

In Fig. 4, the auxiliary receiving body 202 in the modification is a plate-shaped body portion 204 and support protrusions 206 formed at both ends of the body portion 204 (only one side is shown in Fig. 4). And each support protrusion 206 pivots to a portion defining an upper end portion of the receiving portion 151, that is, an upper end portion of the receiving portion 151, through the pin 208. It is mounted as possible.

The auxiliary support body 202 having such a configuration can be used in place of the auxiliary support body 158 and the cover body 176 in the embodiments shown in FIGS. 1 to 3. The other structure in a modification is substantially the same as that of the sphere shown to FIG. 1 thru | or FIG. When the sheet member is received by the receiving portion 151, the supporting protrusion 206 is positioned in the opening / closing housing 12 when the auxiliary receiving body 202 is positioned at the first position indicated by the two-dot chain line in FIG. 4. Contact with the top wall 174 prevents the pivoting movement beyond the first position of the auxiliary receiver 202.

In this first position, the body portion 204 of the auxiliary receiver 202 extends obliquely upward from the upper end of the inclined top wall 152, and its inner surface (left side in the state indicated by the dashed-dotted line in FIG. 4) is The receiving surface which receives the sheet | seat member in cooperation with the upper surface of the inclined top wall 152 is defined. At this time, the main body 204 blocks the supply path for the sorter 4 to supply the sheet member. Therefore, the sheet member discharged from the pair of discharge rollers 102 is accepted as necessary for the receiving portion 151 as described above. On the other hand, when guiding the sheet member to the sorter 4, when the auxiliary receiving body 202 is positioned at the second position shown by the solid line in FIG. 4, the support protrusion 206 fits the upper end of the inclined top wall 152. As it touches, the pivoting movement beyond the second position of the auxiliary receiver 202 is prevented.

In this second position, the main body portion 204 is located above the inclined top wall 152 and extends almost horizontally, and its inner surface (lower surface in the state shown in FIG. 4 by solid line) forms the sheet member 4. The upper side of the feeding route for guiding is defined, and the lower side of the feeding route is defined by the top surface of the inclined top wall 152 and the top surface of the top wall 174. Accordingly, the sheet member discharged by the action of the discharge roller 102 is guided to the inner surface of the main body portion 204 of the auxiliary receiving body 202, and introduced into the support unit body 5 through the feeding path. Guided to the opening 138. In the laser beam printer, the supporting unit body 5 is arranged on one side of the forming apparatus main body 2, in other words, since the supply means 3 and the sorter 4 are arranged, the entire apparatus becomes relatively compact and thus a relatively small space. In addition, the so-called shell support structure can be adopted without any problem.

Claims (6)

Forming apparatus main body 2 which forms an image on the surface of the sheet member during conveyance via the conveyance path 69, supply means 3 for supplying a sheet member to the conveyance path 69, and a plurality of bins An image forming apparatus comprising a tray (130) and a sorter (4) for sorting into the bin tray (130) a sheet member which is discharged from the conveying path (69) and selectively introduced. (3) and this sorter 4 are attached to the support unit body 5 arrange | positioned at one side of the said formation apparatus main body 2, and the said support unit body 5 is attached to or detached from the said formation apparatus main body 2. And an image forming apparatus, wherein the image forming apparatus is mounted. 2. The sorter according to claim 1, wherein the supply means (3) is disposed below the support unit body (5), and the sorter (4) is disposed above the supply means (3). The sheet member introduced into (4) passes through an upper portion of the receiving part 151 that receives the sheet member conveyed through the conveying path 69 through the introduction opening 138 defined in the support unit body 5. An image forming apparatus, characterized in that it is introduced into the sorter (4). The receiving part 151 is located at a downstream side of the receiving part 151 to receive the sheet member discharged from the conveying path 69 and the receiving part 151. Is provided above and is provided with an auxiliary receiving body 158 so as to be able to pivot between the second positions of guiding the lower surface of the sheet member discharged from the conveying path 69 and leading to the sorter 4. An image forming apparatus, characterized in that. The cover body according to claim 3, wherein the forming apparatus main body 2 is pivotally disposed between an open position for opening the upper portion of the receiving portion 151 and a closed position for covering the upper portion of the receiving portion 151. 176 is mounted, the cover member 176 is positioned in the open position and the auxiliary receiver 158 when the sheet member discharged from the conveyance path 69 is received in the receiving portion 151. Is positioned at the first position and the cover member 176 is positioned at the closed position and guided to the sorter 4 when the sheet member discharged from the conveying path 69 is guided. And the receiving body (158) is positioned at the second position. The receiving part 151 is located at a downstream side of the receiving part 151 to receive the sheet member discharged from the conveying path 69 and the receiving part 151. ) Is provided with an auxiliary receiving body 158 so as to be rotatable between the second positions guided to the sorter 4 by guiding the upper surface of the sheet member discharged from the conveying path 69. An image forming apparatus, characterized in that. Forming apparatus main body 2 provided with the conveyance path | route 69 for conveying a sheet member, the receiving part 151 which receives the sheet | seat member in which the image was formed, while conveying through the said conveyance path 69, and several An image forming apparatus comprising a bin tray 130 and a sorter 4 for sorting the sheet member selectively introduced when discharged from the conveying path 69 into the bin tray 130. The receiving part 151 is located at the downstream side of the receiving part 151 and receives the sheet member discharged from the conveying path 69 (the double-dotted line of FIG. 4) and the receiving part 151. The auxiliary receiving body 202 so as to be rotatable between the second position (solid line in FIG. 4), which is located above and guides the upper surface of the sheet member discharged from the conveying path 69 to the sorter 4; ) Is mounted.