JPS61239256A - Form carrying device - Google Patents

Abstract

PURPOSE:To facilitate the removal of a form stuck closely with a recording medium and jams by providing a carrying path openably and separating a member which guides the form to a transfer position from the transfer position in accordance with the opening of the carrying path. CONSTITUTION:When the form jams, a supporting arm 81 holding a carrying belt 16 and a supporting body 77 which supports an air suction means is turned counterclockwise. The supporting body 77 is hung down clockwise around a shaft 79 by its own weight in accordance with this turning and a carrying body 84 is turned counterclockwise through a connecting piece 83. Thus, individual carrying paths in a form carrying system are opened simultaneously. The supporting body 77 is hung down to release the holding of guide plates 72 and 73 due to flat springs and guide plates 72 and 73 are hung down to peel the form from a photosensitive body 5.

Description

Detailed Description of the Invention [Technical Field] The present invention relates to an image forming apparatus that is equipped with a recording medium having a photoconductive layer and that transfers an image of the recording medium. Regarding a conveyance device.

<Prior Art> An electrophotographic copying machine, which is an image forming apparatus, is equipped with a recording medium, a so-called photoreceptor, having a photoconductive layer.

This photoreceptor is formed, for example, in the shape of a drum, and an image forming device is disposed around the periphery of the photoreceptor in opposition to the photoreceptor. Therefore, an electrostatic latent image is formed on the surface of the photoreceptor by being charged and imagewise exposed. The electrostatic latent image above is
This developed image (toner image) is developed with a developing device.
is transferred onto a transfer material that is sent as appropriate. After the image is transferred, some of the image (toner) remains on the photoreceptor, and by removing this toner, the photoreceptor is prepared for the next image formation. A cleaning device is provided opposite the photoreceptor to remove toner on the photoreceptor.

A photoreceptor for image formation is rotatably supported approximately at the center of the main body of the copying machine. When replacing or cleaning the photoreceptor, the photoreceptor is removed from the main body of the copying machine. The photoreceptor is taken out in an axial direction for rotating the photoreceptor.

If the photoreceptor is pulled out in this manner, the surface of the photoreceptor is often soiled with dirt from hands when replacing the photoreceptor or installing the photoreceptor after cleaning. Further, a developing device, a cleaning device, etc. are provided opposite the photoreceptor. The developing device and cleaning device are positioned at fixed positions relative to the photoconductor, and these positions! The pI adjustment was very troublesome. Furthermore, the developing device and the like are configured so that they can be attached and detached from the main body of the copying machine in order to replace developer, replenish toner, and the like. Therefore, adjusting the mutual positional relationship was troublesome.

The above method involves attaching and detaching each device within the copying machine body individually, and each device must be replaced individually.Also, the positioning lights are used, making the attaching and detaching operations extremely troublesome. . Therefore, Japanese Patent Publication No. 58-54392 discloses a device in which a part of the device facing the photoreceptor is integrated and the integrated device is replaced. In this system, a photoreceptor, a developing device, and a cleaning device are attached to the same support member, and this support member is slidably attached to and detached from the main body of the copying machine. With this, the photoreceptor, developing device, and cleaning device are positioned and attached to the support member, so there is no need to adjust their positions when installing them, and they cannot be replaced. Even if it is usable, other devices must be replaced, making it extremely uneconomical.

Furthermore, in handling paper jams, even if a unit that integrates a photoreceptor, a developing device, etc. is pulled out, jammed paper cannot be easily removed.

In other words, since the paper is transported along the transport path, it is necessary to open this transport path. If you pull out the unit in the event of a jam, the jammed paper in the conveyance path will be torn.
There is a risk that the torn paper will remain at that position and the copying operation will be started with some of the paper remaining. Therefore, for jam processing, it is desirable to open the conveyance path and remove the paper without pulling out the unit.

Conventionally, in order to open the transport path, there is a copying machine whose main body is divided into upper and lower parts along the transport path. However, if it cannot be divided into upper and lower sections, it is necessary to separately open the conveyance path. Therefore, the conveyance path for conveying the paper to the transfer position facing the photoreceptor and the conveyance path for conveying the paper after transfer are open. In this case, if the paper jams while being in close contact with the recording medium, the surface of the recording medium will be stained or scratched by hands or the like when the paper is removed.

<Objective> The present invention provides a device that can effectively handle paper jams in a device that transports paper to a transfer position of a recording medium.

In particular, the present invention provides an apparatus that makes it easier to remove paper that is in close contact with a recording medium.

<Embodiment> FIG. 1 is a sectional view showing an electrophotographic copying machine according to the present invention. In the figure, 1 is a document table made of a transparent plastic plate for placing a copied document, 2 is an automatic document feeder (ADF) installed on the document table, and 3 is a recording of the reflected light image from the document on the document table. An optical system including a lens 4 for forming an image on the surface of a photoreceptor as a medium; 5 is a drum-shaped photoreceptor having a photoconductive layer made of arsenic selenium (AszSes) or the like;
6 is a main corona discharger that uniformly charges the photoreceptor to a specific polarity; 7 is the exposure position of the photoreceptor by the optical system; and 8 is the electrostatic latent image formed on the photoreceptor that is developed with colored toner. A developing device 9 is a transfer corona discharger for transferring the developed toner image on the photoreceptor onto a sheet of paper that is appropriately fed via a synchronous roller 10, and 11 is a transfer corona discharger for electrostatically peeling the paper from the photoreceptor. 12 is an AC corona discharger for removing charges remaining on the photoreceptor; 13 is a cleaning device for removing toner remaining on the photoreceptor; 14 is for uniformizing the surface potential of the photoreceptor prior to image formation; Static elimination lamp for
Reference numeral 15 denotes a non-image area erasing lamp that removes charges in unnecessary areas of the photoreceptor after uniform charging.

Further, the electrostatic attraction force of the transferred paper to the photoreceptor 5 is weakened by the action of the AC corona discharger 11, and the paper is peeled off from the photoreceptor 5 due to the stiffness of the paper itself. This peeled paper is conveyed by a conveyor belt 16 provided between the peeling position and the fixing row 217. The conveyor belt 16 is equipped with an air suction means for sucking the back side of the paper, that is, the opposite side to the side supporting the toner image, onto the belt, and the conveyor belt 16 fixes the paper without disturbing the toner image. It is conveyed to rollers 17. Further, the fixing roller 17 is, for example, a thermal fixing roller whose surface '6 facing toner is heated to a temperature capable of fixing the toner, and thermally fixes the toner image onto the paper being conveyed. At the paper output portion of the fixing roller 17,
A paper ejection roller 18 is provided, and the paper sent through the fixing roller 17 is ejected to a paper ejection tray 19 via the paper ejection roller 18 .

The above paper is stored in the paper feed cassette 2, which is attached to and detached from the copier main body.
0, paper feed rollers 23, 24, 2 housed in the paper feed table 21, paper feed tray 22, etc., and provided opposite to each other.
It is sent to the synchronous row 210 by the selection drive of 5.26. The paper fed to this synchronous roller 10 is
In synchronization with the rotation of the photoreceptor 5, the synchronous row 210 is driven to send it to the transfer position. That is, the synchronous roller 10 is synchronized with the rotation of the photoreceptor 5 etc. so that the image forming edge of the photoreceptor 5 and the leading edge of the paper coincide at the transfer position. It is provided so that it can be pulled out in any direction. As shown in FIG. 2, the photoreceptor 5 is
A slide member 27 is attached via a photoreceptor attachment member 29 to a support frame 28 that constitutes a process unit that is slidably provided on the main body of the copying machine.

In addition to the photoreceptor 5, the support frame 28 is provided with some devices that are provided opposite the photoreceptor and perform image formation. That is, the devices disposed on the support frame 28 include the main corona discharger 6, the developing device 8, the cleaning device 13, the static eliminating lamp 14, and the non-image area erasing lamp 15. Here, the AC corona discharger 12 for static elimination is provided with the AC corona discharger 11 for stripping, and the static elimination lamp 14 is provided, so that even if it is not provided, there is no problem in image formation.
,%.

As shown in FIG. 3, the photoreceptor 5 is rotatably held by a glaze 30, and the shaft 30 is fixed to a photoreceptor mounting member 29. As shown in FIG. The photoreceptor mounting member 29 is rotatably supported by the support frame 28 at a support 31. As shown in FIG. One end of the shaft 31 passes through the supporting frame 28, and a manual/pull 32 for rotating the photoreceptor is attached to this protrusion.
A transmission member (not shown) that passes through the support frame 28 and connects to a driving force transmission member provided on the main body of the copying machine is attached to the other end of the copying machine 1 . *A gear 33 for rotating the photoreceptor 5 is fixed to the glaze 31.

Further, as shown in the sectional view of FIG. 4, the photoreceptor 5 is held between seven flanges 36 and 37 provided on the pongee 30 via bearings 34 and 35. A gear 38 for rotating the photoreceptor is attached to the bearing 34 to which the 7 flange 36 is attached, and this gear 38 meshes with the gear 33. Therefore, when the dregs 31 is rotated by the driving force transmitted from the knob 32 or the copying machine main body side, the photoreceptor 5 is rotated via the teeth $33.38. The seven flange 36 is fixed on the pongee 30, that is, the bearing 34 is fixed at the position shown in the figure, and the seven flange 37 is provided movably along the pongee 30. A fixing member 39 for fixing the photoreceptor is hinged to the pongee 30 in correspondence with the seven flange 37. Fixed member 39
By tightening in the left direction, the photoreceptor 5 is firmly fixed between the seven lunges. When this fixing member 39 is removed from the shaft 30, the seven langes 37 can be removed from the shaft 30. As a result, the photoreceptor 5 held between the seven lunges is removed and can be replaced with a new one.

A D cut 40 for attaching the photoreceptor 5 to the mounting member 29 is provided at both ends of the rotation center axis 30 of the photoreceptor 5 . Corresponding to this D-cut 40, on the mounting member 29 side, as shown in FIG. There is. Mounting member 29 for shaft 30 holding photoreceptor 5
For attachment/detachment to the mounting member 29 in FIGS. 5 and 6,
by rotating it counterclockwise with respect to the support 7 frame 28 so that the shaft insertion port 42 communicating with the shaft holding hole 41 faces upward.
Align the D cut 40 of the thin 30 with the insertion opening 42, and insert the shaft 30.
It can be easily attached and detached by pulling it out or inserting it.

At this time, if the shaft 30 is rotated counterclockwise, the D cut 40 will be removed from the insertion opening 42 as shown in FIG. 6, and the insert 30 will be held in the hole 41 and prevented from falling off. Therefore, the axis 30
In order to rotate the photoreceptor 5, a lever 43 is fixed to the shaft 30, and as shown in FIG. Become.

A locking member 44 for holding the mounting member 29 in the open position (the state shown in FIG. 6) is removably provided on the mounting member 29 for mounting the photoreceptor 5. As shown in FIG. Locking member 4
4 is attached to a shaft 45 rotatably provided on the mounting member 29, and is configured to be retracted by rotating the shaft 45.

A lever 46 for rotation is fixed to one end of the shaft 45. A handle 47 fixed to the mounting member 29 is provided corresponding to the lever 46.

Therefore, if you hold the lever 46 and the handle 47,
The glaze 45 can be rotated, and the locking member 44 is sunk. It is opposed to this locking member 44. Therefore, by rotating the mounting member 29 with respect to the support frame 28 as shown in FIG. 6 and rotating the lever 46, the locking member 4
4 can be locked to the locking piece 48, and the mounting member 2
9 can be held in that position.

In the open state shown in FIG. 6, the surface of the photoreceptor 5 is exposed, so that the surface of the photoreceptor 5 can be easily polished.

At this time, in order to polish the entire surface of the photoconductor 5, use the manual knob 3.
2, the photoreceptor 5 may be manually rotated. Thereby, when cleaning the surface of the photoreceptor 5, the photoreceptor 5 can be cleaned while being held without removing the photoreceptor itself, so that the photoreceptor 5 can be easily and reliably cleaned without staining it with hand grime or the like. In this case, A, which is the photoconductive layer of the photoreceptor 5,
828 e3 etc., the A side is coated with a thickness of about 60 μm, and it is coated with a thickness of about 60 μm during one cleaning (polishing).
It is polished by about 0.5 μm.

Further, the attachment member 29 also attaches devices other than the photoreceptor 5. The device attached to this attachment member 29 is
As shown in FIG. 5, a static elimination lamp 14, a discharger id member 49 for removably holding the main corona discharger 6 for uniformly charging the photoreceptor 5, and a non-image area erasing lamp 1 are shown.
It is 5. A positioning shaft 50 for ensuring the positional relationship between the developing device 8 and the photoreceptor 5 is attached to the mounting member 29.

Next, the developing device 8 that develops the electrostatic latent image formed on the surface of the photoreceptor 5 will be described. The developing device 8, as shown in FIG.
A spacing collar 53 is rotatably attached to maintain a constant distance between the two. Further, an id member 54 for horizontally moving the developing device 8 itself is integrally formed on the side surface of the developing tank 51. A positioning portion 55 is formed at the leading end of the developer tank 51 in correspondence with a positioning shaft 50 provided on the mounting member 29 of the photoreceptor 5, and a positioning portion 55 is formed at the rear end of the developing device 8 in a horizontal direction. An engaging portion 56 for moving along is integrally formed.

Inside the developing device 8, that is, inside the developing tank 51, as shown in FIG. 8, a developing roller 57 and stirring rollers 58 and 59 are rotatably provided. The developing row 257 has a magnet provided in a cylindrical non-magnetic sleeve, and, for example, by rotating the sleeve, the developing roller 257 transports the developer attracted onto the sleeve by magnetic force to a developing area facing the photoreceptor 5. It turns out. As a result, the electrostatic latent image formed on the photoreceptor 5 is developed. Stirring rollers 58 and 59 provided opposite the developing roller 57 stir the toner supplied from the toner hopper 52 via the toner supply row 260 and send it to the developing roller 57.

As shown in the side view of FIG. 9, the developing roller 57 and the stirring rollers 58, 59 have gears 61 fixed to one end of each rotating shaft.
, 62.63 are in mesh. A gear 63 on the stirring roller 59 is in a meshing relationship with a gear 64 rotatably provided at the orientation of the support frame 28 when the developing device 8 is moved to a position away from the developing area with the photoreceptor 5. .

The developing device 8 can be attached and detached from above when the support 7 frame 28 is pulled out and the developing device 8 is moved to a position outside the developing area as shown in FIG. Therefore, a positioning lever 65 for moving the developing device is provided on the support frame 28 side. The positioning lever 65 has a long hole 66 (
(see Fig. 10) is passed through the shaft 67,
A tooth 68 is fixed to the glaze 67 so as to face the gear 64 provided at the position of the seven support frames 28.

The positioning lever 65 is rotatably provided around a shaft 69. The pongee 69 is movably provided in a long hole 70 formed in the support 7 frame 28, and is constantly urged downward by a biasing means (not shown). Therefore, by rotating the positioning lever 65, the shaft 67 moves along the elongated hole 66 formed in the horizontal direction.

A long hole 70 formed perpendicular to the long hole 66 compensates for this horizontal movement.

When the developing device 8 is attached to the support frame 28, it engages with the engaging portion 56 as shown in FIG. This is the positioning lever 6 as shown in FIG.
5 is rotated and the pongee 67 is located in the state shown in the figure,
The developing device 8 can be attached to the support frame 28, and the shaft 6
7 is engaged with the engaging portion 56.

Furthermore, a guide body 71 is provided on the side of the support frame 28 in correspondence with the ID member 54 provided on the side surface of the developer tank 51, and is formed in a manner to sandwich the ID member 54 therebetween. When the developing device 8 is mounted, the id member 54 is supported by the id body 71a on the supporting frame 28 side, and the developing device 8 is supported by the supporting frame 28. Then, when the lever 65 is rotated clockwise, the developing device 8 is moved to the left along the side body 71, the spacing collar 53 comes into contact with the periphery of the photoreceptor 5, and the positioning portion 55 is moved toward the axis. 5
0, and the positioning of the developing device 8 is completed. At this time, the distance between the developing device 8 and the photoreceptor 5 is compensated by the spacing collar 53, and the positioning of the developing device 8 is ensured by the pongee 50 and the positioning part 55, and the distance between the developing device 8 and the photoreceptor 5 is compensated by the vertical vibration. The spacing will not shift. In this state, the gear 63 and the like mesh with the driving force transmission means on the copying machine main body side, and the developing row 257 and the like can be driven to rotate.

Further, the developing device 8 can be separated from the photoreceptor 5 and detached from the support frame 28 by rotating the positioning lever 65 to the position shown in FIG.

In this position, as explained earlier, the gear 6 of the pongee 67
8 meshes with the tooth $64 of the support 7 frame 28, and this gear 6
4 and the gear 63 of the developing device 8 mesh with each other.

Therefore, by rotating the shaft 67, the developing roller 57 and stirring rollers 58 and 59 in the developing tank 51 are rotated.
The developer is stirred. In order to perform this rotation, a manual stirring knob 72 is fixed to one end of the glaze 67.

Next, a paper transport system according to the present invention, which transports the paper to the transfer position of the photoreceptor 5 and transports the paper from this transfer position to other processes, will be described in detail.

First, in FIG. 11, sheets sent from each paper feed section are sent to the synchronous roller 10 via transport rollers 87 and 89 arranged at a position where the transport paths of the paper feed sections merge. As described above, the synchronous roller 10 transports the paper in synchronization with the image forming tip of the photoreceptor 5 at the transfer position. The synchronous row 210 is provided on the support frame 28 in the process unit, and feeds the paper to a transfer position facing the photoreceptor 5 via a conveyance path formed on the side plate 72 and U'73. The guide plates 72 and 73 have one end rotatably supported on the support frame 28 by a shaft 74, 75, and the other end is attached to the peripheral surface of the transfer position of the photoreceptor 5, as shown in FIG. It has been extended.

As shown in Figure t513, the idle plates 72 and 73 act so as to constantly hang downward about the shafts 74 and 75 due to their own weight. In order to hold this in the position shown in FIG. 11, it is held by a holding leaf spring 76. Leaf spring 76
As shown in FIG. 13, its lower end is fixed to a support 77 that supports the conveyor belt 16 and air suction means, and its free end holds an id plate 73. Further, the guide plates 72 are maintained at constant intervals via a spacing member 78 formed integrally with the side plate 73, and are held at the position shown in FIG.

The support body 77 is rotatably supported by the main body of the copying machine at a support 79. The support body 77 is connected to a conveyor belt 1 that forms a conveyance path for conveying the paper, which has been peeled off from the photoreceptor 5 by the action of the AC corona discharger 11 after the transfer, to the fixing roller 17.
It is equipped with 6. In addition to the conveyor belt 16, a transfer corona discharger 9 and an AC corona discharger 11 are detachably attached to the support 77.The transfer corona discharger 9 and the AC corona discharger 11 is integrally formed and is attached to the support body 77 with a margin so as to be able to swing up and down, for example.
In order to position the corona discharge wire, an insulating member for fixing the corona discharge wire is formed so as to match the shape of the corresponding portion of the support 7 frame 28. Therefore, as shown in FIG. 11, the insulating members of the support body 77 and the corona dischargers 9 and 11 come into contact with each other, and the support body 77 is positioned with respect to the photoreceptor 5.

The support body 77 is held in the state shown in FIG. 11 by a support arm 81 rotatably supported by a shaft 80 on the main body of the copying machine in order to configure a paper conveyance path by the conveyance belt 16. There is. The support arm 81 is provided with rollers 82 in a portion that comes into contact with the support body 77 so as to be freely rotatable. Although not shown, a handle for easily rotating the arm 81 is appropriately attached to the support arm 81. As a result, when the support arm 81 is rotated counterclockwise, the support body 77 hangs down around the shaft 79 due to its own weight, and the paper conveyance path in the conveyance belt 16 is opened as shown in FIG. 12.

On the other hand, a conveying body 84 for conveying paper is connected to the support arm 81 via a connecting piece 83. Connecting piece 83
is rotatably attached to the support arm 81 and the carrier 84 at both ends. The conveyor 84 has a shaft 8 attached to the main body of the copying machine.
40, and one side plate 85 for guiding the paper fed from each paper feeding unit explained in FIG. 1 to the synchronous roller 10; It has one driven roller 86, 87 for conveying the paper. Rollers 88 and 89 facing the rollers 86 and 87 are drive rollers that are provided on the copying machine main body side and to which driving force is transmitted. The roller 88 further includes a driven roller 9.
0 are provided facing each other, and feed the paper fed by the paper feed roller 25 to rollers 86 and 88. Further, the conveyance rollers 87 and 89 are respectively located at the confluence of the conveyance paths of the paper sent via the paper feed roller, and transport the paper to the synchronous roller 1.
It sends it to 0.

In the above-described configuration, the support arm 81 is used to remove paper jams or when pulling out the support frame 28.
It is rotated counterclockwise in the figure. At this time, as shown in FIG. 12, the support body 77 hangs down due to its own weight in a clockwise direction around the book 79, and the carrier 84 is rotated counterclockwise via the connecting piece 83. This opens the conveyance path in the conveyance system, making it easier to dispose of jammed paper.

In addition, as shown in FIG. 13 in detail, the supporting body 77 hangs down to guide the paper to the transfer position.
3 also sags under its own weight. This drooping is regulated by a stopper 91 provided on the support frame 28. Therefore, the paper that is in close contact with the photoreceptor 5 etc. can be reliably peeled off, and the paper can be processed more easily.

The drawing out of the support 7 frame 28 is possible only when the support arm 81 is rotated counterclockwise and is in the state shown in FIG. 12. In this case, the support body 77 is provided with a regulating member 92 that regulates the support frame 28 from being pulled out. This regulating member 92 is fixed to the support body 77 so as to correspond to the support frame 28 in the state shown in FIG. Therefore, in the state shown in FIG. 11, the regulating member 92 of the support body 77 faces the support frame 28 and is in the regulating state, thereby preventing the support frame 28 from being pulled out. However, by opening the transport system using the support arm 81, the restricting member 92 is released from the drawing-out restricting position of the support 7 frame 28 as shown in FIG. become.

When the support arm 81 is rotated clockwise, the support body 77 is lifted up, and the plate spring 76
3 is pushed up. Therefore, the end plates 72 and 73 are positioned in the vicinity of the transfer position where their tips face the photoreceptor 5. The guide plate 72 is a stopper 9 for positioning.
3 (see Figure 13 for details).

Next, the cleaning device 13 for cleaning toner remaining on the photoreceptor 5 will be described.

The cleaning device 13 includes a cleaning blade 95 inside a box 94, and removes residual toner by bringing the tip of the cleaning blade 95 into pressure contact with the surface of the photoreceptor 5. This cleaning device 13 is also provided in a detachable manner with respect to the support seven frames 28. Therefore, as shown in FIG. 5, the support frame 28 has
The cleaner guides 96a and 96b are the cleaning device 1
It is provided so as to sandwich the box body 94 of No. 3.

As shown in FIG. 14, the cleaning device 130 box body 94 has a fixing engagement pin 97 fixed to its upper part, and has screw holes 98 for screwing into the cleaner guides 96a and 96b. On the other hand, an engagement hole 99 is formed in the cleaner id 96a in correspondence with an engagement pin 97, as shown in FIG. This hole 99 is formed in an L-shape as shown in the figure. 100 in the figure is
This is a screw hole for fixing screws.

The cleaning device 13 can be removed from the support frame 28 by removing all screws, moving the box 94 to the right with respect to the axis of the photoreceptor 5, and pulling it out toward the front. For mounting, the operation described above can be performed in reverse.

In the structure as described above, the operation when replacing or cleaning the photoreceptor 5 will be explained.

First, open the front door (not shown) of the copying machine main body, rotate the support arm 81 counterclockwise, and then
7. The transport body 84 is also rotated to open the transport system. In the open state of the transport system, the support frame 28 can be pulled out in the thickness direction of the front surface. At this time, the support 7 frame 28 can be pulled out because the support body 77 is already open and the restriction member 92 is not in the restriction position. The state in which the support frame 28 is pulled out is as shown in FIG.

Next, the positioning lever 65 provided on the seven support frames 28 that has been pulled out is rotated counterclockwise. Developing device 8
is moved to the right in the figure (the state shown in Figure 10), and the photoreceptor 5
spaced apart more widely. In this state, by removing the screws etc. fixing between the support 7 frame 28 and the mounting member 29 of the photoreceptor 5, the mounting member 29 can be rotated around the shaft 31, for example, in a counterclockwise direction. Then, as shown in FIG. 6, the locking member 44 is locked to the locking piece 48 and held in that state.

When the mounting member 29 is opened as shown in FIG. 6, a part of the surface of the photoreceptor 5 is exposed. Therefore, the photoreceptor 5 can be cleaned with the mounting member 29 attached. At this time, the photoreceptor 5 is rotated during cleaning, but
To do this, it is rotated via manual/pull 32 to easily clean the entire photoreceptor surface. In this way, cleaning can be performed while holding the photoreceptor 5,
There is no risk of staining the surface of the photoreceptor with hand grime, etc., and reliable cleaning is possible.

When replacing the photoreceptor 5, remove the screw 430 in the state shown in Figures F and 6, and turn the lever 43 clockwise in the figure. As a result, the D-cut 40 portion of the shaft 30 for holding the photoreceptor 5 faces the insertion opening 42 . Therefore, the axis 30
can be removed from the mounting member 29 along the insertion opening 42. The photoreceptor 5 taken out from the mounting member 29 can be removed from the shaft 30 by removing the fixing member 39 and pulling out the 7 langes 37 from the port 30, as shown in FIG. 4, and can be replaced with a new one. . In this manner, the photoreceptor 5 is replaced, and its attachment can be easily performed by reversing the steps described above.

Next, the developing device 8 will be explained. This replacement of the developing device a8 is performed when changing the color of developing toner, etc.

The developing device 8 is separated from the photoreceptor 5 by rotating the positioning lever 65 after pulling out the support frame 28 as described above. In this state, the development W1
The id member 54 of 51 comes off from the id body 71 on the support 7 frame 28 side. Therefore, the developing device 8 can be taken out upward. If the developing device 8 is positioned as shown in FIG. 10, by rotating the manual knob 72, the developing roller 57 and stirring rollers 58, 59 in the developing device 51 are rotated, and the developer is stirred. Stir with 421
The developed developer is supplied to the developing roller 57. In this way, it is possible to manually rotate the developing roller 57 and the like at a position away from the photoreceptor 5. This is because the developer generated by the magnetic brush rubs against the same surface of the photoreceptor 5 when the photoreceptor 5 is stopped, which prevents the surface of the photoreceptor in that area from being damaged or from adhering to excess toner. .

The developing device 8 is positioned in the developing area facing the photoreceptor 5 by rotating the positioning lever 65 clockwise in the state shown in FIG. This is done by moving the At this time, the developing device 8 is always positioned at a constant distance from the photoreceptor 5 due to the contact between the spacing collar 53 of the developer tank 51 and the photoreceptor 5, and the engagement between the positioning shaft 50 and the positioning portion 55.

Next, the action of jam processing in the present invention will be explained. When paper jams, the front door of the copying machine (not shown)
, and rotate the support arm 81 counterclockwise from the state shown in Figure IJIJ11. Along with this rotation, the support body 77
hangs clockwise around the shaft 79 under its own weight, and the connecting piece 83
The carrier 77 is rotated counterclockwise via the . As a result, each conveyance path in the paper conveyance system is simultaneously opened as shown in FIG. Therefore, paper jammed in the conveyance path can be easily removed by opening the conveyance path.

In this case, since each conveyance path is opened at once, the operation for opening becomes very simple.

In addition, since the support body 77 hangs down, the side plate 72.7
Since the holding by the leaf spring 76 of No. 3 is released, the side plates 72 and 73 hang downward as shown in FIG. 13. At this time, even if a paper jam occurs while the paper is in close contact with the photoreceptor 5, the paper will be peeled off from the photoreceptor 5 because the ID plates 72 and 73 will hang down under their own weight. Therefore, jammed paper can be easily disposed of without touching the surface of the photoreceptor with hands or the like.

Since the support frame 28 can be pulled out, the support frame 28 may be pulled out in the event of a paper jam. If the support frame 2 is pulled out when paper is jammed, the jammed paper will tear and a portion of the paper will become stagnant in the conveyance path, damaging the photoreceptor 5 or causing the next paper to jam due to the stagnant paper. I will do it. Therefore, the structure is such that the support frame 28 cannot be pulled out unless the conveyance path is opened. That is, the restriction member 92 provided on the support body 77 restricts the support frame 28 from being pulled out. Therefore, during Noyam processing, before pulling out the support 7 frame 28, the support arm 81 is rotated,
By opening the conveyance system, the jammed paper can be removed and the above-mentioned problem will disappear.

As described above, by opening the conveyance system and disposing of the jammed paper, the conveyance path is returned to the state shown in Fig. PltJ11. This is performed by rotating the support arm 81 clockwise. At this time, the support body 77 and the conveyance body 74 simultaneously
Since it is restored with a single operation, there is no need to forget to close one of the transport paths and start the copying operation.

In other words, it becomes very easy to repeat the steps required to return to the normal state.

In the present invention, in connection with the process unit in which the photoreceptor, the developing device, etc. are supported on the same support member, the transport path connected to the paper transport system is opened, in particular, the side plate 72, etc. are opened. The present invention is not limited to this, and can be applied to all types of copying machines other than those in which the main body of a copying machine is separated along a conveyance path. Moreover, regarding the synchronous roller 10, one roller may be opened in conjunction with the opening of the conveyance path.

<Effects> According to the present invention, in a configuration in which paper is conveyed along a conveyance path in order to transfer an image formed on a recording medium, the conveyance path is provided so as to be openable, and the conveyance path is opened. Since the member that guides the paper to the transfer position in conjunction with the release is moved away from the transfer position, the paper that has jammed in close contact with the recording medium can be easily removed without touching the recording medium. Therefore, it is possible to prevent the recording medium from being soiled or scratched.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the overall structure of an electrophotographic copying machine according to the present invention, FIG. 2 is a perspective view showing a process unit according to the present invention pulled out from the main body of the copying machine, and FIG. FIG. 4 is a perspective view showing the holding structure, FIG. 4 is a cross-sectional view showing the structure of the recording medium, FIG. 5 is a side view showing the overall structure of the process unit section of the present invention, and FIG. 6 is the open state of the recording medium. 7 is a side view, FIG. 7 is a perspective view showing the external appearance of the developing device, FIG. 8 is a sectional view showing the internal structure of the developing device, and FIG. 9 is a sectional view showing the internal structure of the developing device.
10 is a side view of the device showing the drive system of the developing device, FIG. 10 is a side view showing the state of attachment and detachment of the developing device in the process unit, and FIG. 11 is a diagram showing the relationship between the process unit and the paper conveyance system in the present invention. 12 is a side view showing the open state of the conveyance system in FIG. 11, FIG. 13 is a side view showing details of the guide section to the paper transfer position in FIG. 12, and FIG. 14 is a cleaning device. Figure 15 is a perspective view showing the external appearance of the box, and Figure 15 is a plan view showing the fixing part of the cleaning device in the process unit. 5; Photoreceptor 8; Developing device 16; Conveyor belt
72, 73; id plate 77; support body 76; plate spring
81; Support arm 83; Connecting piece 84: Conveyor 85; ID plate 86.87; Conveyance roller 91,
93 Nisdopar Agent Patent Attorney Yoshihiko Fukushi (2 persons) Fig. 1 Fig. 2 B Fig. 9 Fig. 10 Fig. 13 Fig. 15

Claims (1)

[Claims] 1. In order to transfer the image formed on the recording medium, in a paper conveyance device that conveys the paper, a conveyance path for conveying the paper is provided so as to be openable, and the paper is guided to the transfer position of the recording medium. A paper conveyance device, characterized in that a guide member is rotatably provided, and the guide member is moved away from a transfer position in conjunction with the opening operation of the conveyance path.