JPS61239255A - Form carrying device - Google Patents

Abstract

PURPOSE:To simplify the processing of a jamming form by constituting a device so that a carrying path which carries the form to a transfer position and a carrying path which carries the form from the transfer position to the next process are opened simultaneously. CONSTITUTION:A carrying belt 16 and a supporting body 77 which supports an air suction means are held by a supporting arm 81. A carrying body 84 for forming the carrying path which carries the fed form to the transfer position is connected to the supporting arm 81 through a connecting piece 83. The supporting arm 81 is turned counterclockwise for the jam processing of the form. At this time, the supporting body 77 is hung clockwise around a shaft 79 by its own weight and the carrying body 84 is turned counterclockwise through the connecting piece 83. Thus, individual carrying paths in a form carrying system are opened simultaneously. The supporting body is hung to hang down guide plates 72 and 73 which guide the form to the transfer position by their own weights.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a paper conveyance device for conveying the entire sheet of paper to the recording medium in an image forming apparatus of a type in which a recording medium is biased and an image of the recording medium is transferred.

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

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
The image is developed by a developing device, and the developed image (toner image) 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 removed in this manner, the entire surface of the photoreceptor is often soiled with dirt and grime during replacement or when the photoreceptor is installed after cleaning. ! Further, a developing device, a cleaning device, etc. are provided opposite the photoreceptor. The developing device and the cleaning device are positioned at fixed positions with respect to the photoreceptor, and it is extremely troublesome to adjust their positions. Furthermore, the developing device, etc., is configured to be detachable from the copying machine body in order to replace developer, replenish toner, etc. It was troublesome to adjust the mutual positional relationship. .

The above method involves attaching and detaching each device inside the copier body individually, and it is necessary to perform replacement etc. individually, and the attachment and detachment operation is very troublesome because the machine positioning etc. are carried out. 0Therefore, a device was developed in 1973 to completely integrate a part of the device facing the photoconductor and to replace the integrated device.
This is clearly stated in Japanese Patent No. g-54392. 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. In this case, the photoreceptor, the developing device, and the cleaning device do not need to be positioned and attached to the support member, and there is no need to adjust their relative positions at the time of attachment, and the replacement operation becomes very simple. However, it is not possible to replace only the photoreceptor, and even if other devices can be used, it is necessary to replace the other devices at the same time, which is extremely uneconomical.

In addition, in handling jammed paper, even if the photoreceptor, developing device, etc. are all integrated into a unit, the jammed paper cannot be removed. In other words, since the paper is transported along the transport path, it is necessary to fully open the transport path. Here, if you pull out the above unit) Th when there is a jam,
Sometimes the jammed paper in the conveyance path is torn and stagnant at that position, and then the copying operation is started. Therefore, in handling the jam, it is desirable to open the conveyance path and remove the jammed paper without ejecting the entire 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 the paper cannot be divided into upper and lower sections, it is necessary to open the entire transport path separately. Therefore, the transport path that transports all of the paper to the transfer position facing the photoreceptor, and the transport path that transports the entire paper after transfer, must be opened separately. It is set up so that it can be opened. With such devices that open each conveyance path individually, not only is it troublesome to open all the conveyance paths, but the copying operation may be started with the conveyance paths fully open. , creating the cause of jam occurrence.

Purpose of the present invention: An object of the present invention is to ensure reliable and easy handling of jammed paper in a paper transport device that transports paper to a transfer position of a recording medium, and then from the transfer position to another process. shall be.

Another object of the present invention is to simplify the paper conveyance path opening process and the post-processing after jam removal in order to facilitate jam removal.

<Embodiment> FIG. 1 is a sectional view showing an electrophotographic copying machine according to the present invention. In the figure, 1 is an original platen made of a transparent glass plate for placing a copied original, 2 is an automatic document feeder (ADF) installed on the original platen, and 3 records the reflected light image from the original on the original platen. A t-th lens 4 that forms an image on the surface of the photoreceptor, which is a medium.
5 is a drum-shaped photoreceptor having a photoconductive layer made of arsenic selenium (As2Se3), etc.; 6;
1 is a main corona discharger that uniformly charges the photoreceptor to a specific polarity, 7 is an exposure position on the photoreceptor by the optical system, and 8 is a developer that develops the entire electrostatic latent image formed on the photoreceptor with colored toner. 9 is a transfer corona discharger for transferring the developed toner image on the photoreceptor to the sheet appropriately fed via the synchronous roller IO; 1 is a transfer corona discharger for electrostatically separating the sheet from the entire photoreceptor; AC corona discharger, 12 is the charge remaining on the photoreceptor? 13 is a cleaning device for removing toner remaining on the photoreceptor; 14 is a static eliminating lamp for making the surface potential of the photoreceptor uniform before the next image formation; 1
Reference numeral 5 denotes a non-image area erasing lamp that removes all charged charges in unnecessary areas of the photoreceptor after uniform charging. The force is weakened, and the paper is peeled off from the photoreceptor 5 due to its stiffness. This peeled paper is conveyed by a conveyor belt 16 provided between the peeling position and the fixing roller 17. The conveyor belt (16) is an air suction means for fully supporting the toner image on the back side of the paper and sucking it onto the belt on the opposite side to the T side, and by transporting the conveyor belt (16), the toner image is not disturbed. The paper is conveyed to the fixing roller 17 without any problem. The fixing roller 17 is, for example, a thermal fixing roller whose surface facing the toner is heated to a temperature capable of fixing the toner, and thermally fixes the toner image onto the paper being conveyed. A paper ejection roller I8 is provided at the paper output portion of the fixing roller (1 core), and the paper that is fed through the entire fixing roller 17 is ejected to the 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 accommodated in the paper feed table 21, paper feed tray 22, etc., and provided facing each of them.
5.26 selective drive, it is sent to the synchronous roller IO. The paper fed to this synchronous roller lO is
The synchronous roller 10 is driven in synchronization with the rotation of the photoreceptor 5, and is sent to the transfer position. That is, the synchronous roller 10 is driven and controlled in synchronization 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.

In the copying machine having the structure described above, the photoreceptor 5 is provided so as to be able to be pulled out in the axial direction. As shown in FIG. 2, the photoreceptor 5 is attached via a photoreceptor mounting member "29" to a support frame 28, which constitutes the entire process unit, which is slidably provided on the main body of the copying machine using a slide member 27. It is being

In addition to the photoreceptor 5, the support frame 28 is provided with some devices that are provided opposite the photoreceptor and perform all 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 11i for stripping, and the static elimination lamp 14 is provided, so that there is no problem in image formation even if the AC corona discharger 12 is not provided. As shown in the figure, a shaft 30 is held rotatably, and the shaft 30 is fixed to a photoreceptor mounting member 29. The photoreceptor mounting portion 29 is rotatably supported by the support frame 28 via the shaft 3. One end of the shaft 31 passes through the support frame 28, and a manual knob 32 for rotating the photoreceptor is attached to this protrusion. A gear 33 for rotating the photoreceptor 5 is fixed to a shaft 31 to which a transmission member side (not connected to a driving force transmission member provided on the side) is attached.

Further, as shown in the sectional view of FIG. 4, the photoreceptor 5 is held between flanges 36 and 37 provided on the shaft 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 shaft 31 is rotated by the driving force transmitted from the manual knob 32 or the copying machine main body side, the photoreceptor l is rotated via the gears 33 and 38i. The 7 langes 36 are fixed on the shaft 30, that is, the bearings 34 are fixed at the positions shown in the figure, and the 7 langes 37
is provided movably along the axis 30. A fixing member 39 for fixing the photoconductor is attached to the shaft 3 in correspondence with this 7-lunge 37.
It is screwed to 0.

When the fixing member 39 is tightened in the left direction, the photoreceptor is firmly fixed between the flanges. This fixing member 39 is the shaft 30
Once the twist is removed, the seven flange 37 can be removed from the shaft 30, and the photoreceptor 5 held between the flanges can be removed and 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, the fifth
As shown in the figure, a shaft insertion opening 42 that communicates with a hole 41 that holds the shaft 3 (1) is formed to match the shape of the D cut 40.A mounting member "29" for the shaft 30 that holds the photoreceptor 5 is formed.
For attachment/detachment to the mounting member 29 in FIGS. 5 and 6,
The shaft 30 is rotated counterclockwise relative to the support frame 28, the shaft insertion opening 42 communicating with the shaft holding hole 41 is directed upward, the D cut 40 of the shaft 30 is aligned with the insertion opening 42, and the shaft 3
It can be easily attached and detached by fully 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 shaft 30 will be held in the hole 41 to prevent it 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.

The attachment member 29 for attaching the photoreceptor 5 is provided with a locking member 44 that can be freely extended and retracted to hold the attachment member 29 in the open position (the state shown in FIG. 6). The engaging member 44 is attached to a shaft 45 rotatably provided on the mounting member 29, and is configured to be moved in and out by rotating the shaft 45. A lever 46 for rotation is fixed to one end of the shaft 45. Corresponding to this lever 46, a legitimate child 47 fixed to the mounting member 29 is provided.

Therefore, if the lever 46 and the legitimate child 47 are clamped, the shaft 45 can be fully rotated, and the locking member 44 will be depressed. The support frame 28 corresponds to this engaging member 44.
A locking piece 48 is provided on the side. Therefore, the mounting member 2
9 as shown in FIG. 6, and the lever 46 is fully rotated, the locking member 44t1 can be locked to the locking piece 48, and the mounting member 29 can be held in that position. In the released state shown in FIG. 6, the surface of the photoreceptor 5 is exposed;
Photoreceptor 5 surface? Can be polished easily. At this time, in order to polish the entire surface of the photoreceptor 5, the photoreceptor 5 may be manually rotated using the knob 32. Thereby, when cleaning the surface of the photoreceptor 5, the photoreceptor 5 can be cleaned without removing the photoreceptor itself and can be cleaned while being held, so that the photoreceptor 5 can be easily and reliably cleaned without staining the entire photoreceptor 5 with hand grime. In this case, A s 2 S e 3 which is the photoconductive layer of the photoreceptor 5
etc., the At surface is coated with a thickness of about 60 μm, and 0.2 to 0.5
Polished to about μm.

Further, the entire device other than the photoreceptor 5 is also attached to the attachment member 29. The device attached to this attachment member 29 is the fifth
As shown in the figure, a static elimination lamp 14, a main corona discharger 6″f for uniformly charging the photoreceptor 5: a discharger guide member 49 for detachably holding the discharger, and a non-image area erasing lamp 1.
It is 5. A companion positioning shaft 50 that ensures the positional relationship between the developing device 8 and the photoreceptor 1 is attached to the attachment member 29.

Next, the developing device 8 that develops the electrostatic latent image formed on the surface of the photoreceptor 5 will be described. As shown in FIG. 7, the developing device 8 has a developing tank 51 and a toner hopper 52 integrally formed using screws or the like. A companion spacing collar 53 is rotatably mounted to maintain constant spacing. Further, a guide member 54 for moving the developing device 8 itself in the entire horizontal direction is integrally formed on the side surface of the developing tank 5I. A positioning portion 55 is formed at the leading end of the developer tank 5'1 in correspondence with a positioning shaft 50 provided on the mounting member 29 of the photoreceptor 5, and a developing device 8 is formed at the rear end. Holding part 5 for moving along the horizontal direction
6 is integrally formed.

Inside the developing device 8, that is, inside the developing tank 51, as shown in the sectional view of FIG. 8, a developing roller 57 and stirring rollers 58 and 59 for stirring the entire developer are rotatably provided. The developing roller 57 has a magnet provided in a cylindrical non-magnetic sleeve, and by rotating the sleeve fully, for example, the developer attracted onto the sleeve by magnetic force is entirely conveyed to the developing area facing the photoreceptor 5. It turns out. As a result, the electrostatic latent image formed on the photoreceptor 5 is developed. This developing roller 57
Agitating rollers 58 and 59 provided opposite to the toner are used to agitate all of the toner supplied from the toner hopper 52 via the toner replenishing roller 60 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 and 63 are engaged. A gear 63 connected to the agitation roller 59 is rotatably provided at a fixed position on the support frame 28 and meshes with a t-gear 64 when the developing device 8 is moved to a position away from the developing area with the photoreceptor 5. be.

The developing device 8 can be attached and detached from above when the supporting frame 28 is pulled out and the developing device 8 is moved to a position outside the entire developing area as shown in FIG.

To this end, a positioning lever 65 for moving the developing device is provided on the support frame 28 side. The positioning lever 65 is connected to a long hole 66 (first
A shaft 67 is provided through the shaft 67 (see FIG. 0), and a gear 68 is fixed to this shaft 67' in a fixed position on the supporting frame 28 in correspondence with the ratio gear 64. The positioning lever 65 is rotatably provided around a shaft 69.

The shaft 69 is formed in the support frame 28, is movably provided in the elongated hole 70, and is always urged downward by an urging means (not shown). Therefore, the positioning lever
By fully rotating the shaft 65, the shaft 67 moves along the long hole 66 formed in the horizontal direction. A long hole 70 formed perpendicular to the long hole 66 compensates for this horizontal movement.

The shaft 67 is provided to correspond to the engaging portion 56 of the developing device 8, and is engaged with the engaging portion 56 as shown in FIG. 7 when the developing device 8 is attached to the support frame 28. match.

This occurs when the positioning lever 65 is rotated and the shaft 67 is positioned as shown in FIG.
It can be attached to the T-support frame 28, and the retaining portion 56 is engaged with the shaft 67. Further, corresponding to the guide member 54 provided on the side surface of the developer tank 51, a companion guide body 7I is provided on the side of the support frame 28 so as to be completely inserted into the guide member 54. When the developing device 8 is installed, the guide member 5° 4 is supported by the guide body 7'la on the support frame side. Then, if you turn the lever 65 gold clockwise,
The developing device 8 is moved to the left along the guide body 7°l, and the spacing collar 53 comes into contact with the periphery of the photoreceptor 5.
The positioning portion 55 comes into contact with the shaft 50, and the positioning of the developing device 8 is completed. At this time, the developing device 8
In addition to ensuring the distance from the g light body, the axis 50
The positioning section 55 allows reliable positioning, and the distance between the g-light body 5 and the g-light body 5 does not shift due to vibrations such as up and down.

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 roller 57 and the like are rotated.

Further, by rotating the positioning lever 65 to the position shown in FIG. 10, the developing device 8 can be separated from the photoreceptor 5 and detached from the support frame 28.

In this position, the gear 6 of the axis 6γ is
8 meshes with a gear 64 of the support 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. To perform this rotation, the axis 6
A manual stirring knob 72 is fixed to one end of 7.

Next, a detailed description will be given of the paper transport system according to the present invention, which transports the entire sheet to the transfer position of the photoreceptor 5 and transports the paper from this transfer position to other processes. First, in Figure 11,
The paper sent from each paper feed section is transported by transport rollers 87 and 89 located at the feet where the transport paths of each paper feed section merge.
' to the synchronous roller 10. This synchronous roller 10 transports the paper in synchronization with the image forming tip of the photoreceptor 5 at the transfer position as described above. The synchronous roller IO is provided on the support frame 28 in the process unit, and is mounted on the guide plate 7.
The paper is sent to a transfer position facing the photoreceptor 5 via a conveyance path formed by 2 and 73. The guide plates 72 and 73 have one end attached to the support frame 28 with a shaft 74.75.
The other end is extended to the transfer position of the photoreceptor 5. The guide plates 72 and 73 act so as to constantly hang downward from the center of 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 7
6 has one end fixed to a support 7° 7 that supports the conveyor bell) 16 and the air suction means, and its free end holds a guide plate 73.

The box guide plate 72 is maintained at a constant distance from the guide 73 by a spacing member 78, and is held at the position shown in the first figure.

The support body 77 is rotatably supported by the copying machine main body around a shaft 79. The support 77 includes a narrow conveyor belt 16 that forms a conveyance path for conveying the next sheet of paper to the fixing roller 17 after being peeled off from the photoreceptor 5 by the action of the AC corona discharger 11 after the transfer.

In addition to the above-mentioned conveyor belt, a transfer corona discharger 9 and an AC corona discharger 11 are attached to the support body τ7, including a guide member for attachment and detachment.

Transferring corona discharger 9 and peeling AC corona discharger 11
is integrally formed and attached to the support body 77 with a margin so as to be able to swing up and down, for example. In order to perform positioning with the photoreceptor 5, an insulating member for fixing the discharge wire of each discharger 9.degree. 11 is formed so as to match the shape of the corresponding portion 28a of the support frame 28. Therefore, as shown in FIG.
is positioned, the portion 28 of the support frame 28
The insulating member of the discharger 9.11 comes into contact with a, and positioning with the photoreceptor 5 is performed.

The support body 77 is held in the state shown in FIG. 11 by a support arm 8NC rotatably supported by a shaft 80 on the main body of the copying machine in order to configure the entire paper conveyance path by the conveyance bell 16. The zero support arm 81 shown in FIG.
The roller 82 is provided so as to be fully rotatable. This support arm 81
Although not shown in the figure, a heir to fully rotate the arm 81 is appropriately attached. As a result, when the support arm 81 is rotated counterclockwise, the support body 77 hangs down at the entire center of 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 conveyance body 84 is connected to the support arm 81 to form a complete conveyance path for conveying the paper fed through the connecting piece 83 to the transfer position.

Both ends of the connecting piece 83 are rotatably attached to the support arm 81 and the carrier 84. The conveyor 84 is rotatably provided on the main body of the copying machine about a shaft 840. One guide plate 85 is attached to this conveyance body 84, and guides the paper selected and fed from each paper feed unit explained in FIG. 1 to the synchronous roller lO for sending it to the transfer position. ing. In contrast to the guide plate 85 of the conveyor 84, there is a guide plate 85 on the copying machine main body side that forms the entire conveyance path with the guide plate 85.
0 are provided facing each other. This guide plate 85°85
0, especially paper feed rollers 23 and 24.
．． Conveyance rollers 87 and 89 for conveying the paper to the synchronous roller 10 are disposed at the confluence A of the conveyance paths for the sheets that are fully conveyed. Here, the sheets fed by the sheet feed rollers 23 and 24 are sent as they are to the conveying rollers 87 and 89 of the merging section A. Further, the paper fed by the paper feed roller 25 is transported by transport rollers 88 and 9.
0 into a conveyance path formed by guide plates 85 and 850. The next sheet of paper that has been conveyed is placed on the guide plate 8.
A conveyance roller 86 arranged in a conveyance path of 5°850
It is sent to the confluence part A at °88. Further, the paper fed by the paper feed roller 26 is sent as it is into the transport path of the guide plates 85, 850, and is sent to the merging section A via all the transport rollers 86, 88.

Each of the above-mentioned conveyance rollers, particularly rollers 88 and 89, are drive rollers provided on the copying machine main body side and to which driving force is transmitted.

A roller 90 facing the roller 88 is a driven roller, and is rotatably provided on the copying machine main body side together with the drive roller 88. Rollers 86 and 87, which are provided opposite to the drive rollers 88 and 89, are driven rollers and are rotatably provided on the conveying body 84 side.

In the above-described configuration, the support arm 81 is used as the 11th
It is rotated counterclockwise in the figure. At this time, as shown in FIG. 12, the support body 77 hangs down by its own weight clockwise around the entire center of the axis γ9, and the carrier 84 is rotated counterclockwise through the entire connection piece 83. As a result, each conveyance path in the paper conveyance system is opened at the same time, making it easier to dispose of jammed paper. Since the t1 support body 77 hangs down,
Guide plates 72 and 73 that guide the paper to the transfer position also hang down due to their own weight. This drooping is regulated by a stopper 91 provided on the support frame 28. Therefore, all of the paper that is in close contact with the photoreceptor 5 etc. can be reliably peeled off, and the paper can be easily processed. The support frame 28 can be pulled out only when the support arm 81 is in the state shown in FIG.

This is because a regulating member 92t- is provided on the support body 7τ, and this regulating member 92 makes it impossible to pull out the support frame 28. However, by moving the support arm 81 and releasing the conveyance system, the regulating member 92 is released from the regulating position (
The state shown in FIG. 12) allows the support frame 28 to be pulled out.

On the other hand, when the support arm 81 is rotated clockwise, the support body 77 is lifted up, and the guide plate 72 is pulled up by the leaf spring 76.
．． 73 is pushed up, and its tip is positioned near the transfer position facing the photoreceptor 5.

The guide plate 72 has a positioning stopper 93Vc,
Positioned.

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

The cleaning device 13 includes a cleaning grade 95 inside a box 94, and removes all residual toner by bringing the tip of the cleaning blade 95 into pressure contact with the entire photoreceptor 5. This cleaning device 13 is also provided so as to be detachable from the support frame 28. To this end, cleaner guides 96a and 96b are provided on the support frame 28, as shown in FIG. 5, so as to sandwich the box 94 of the cleaning device 13. Cleaning device 13
As shown in FIG. 13, the box body 94 has a fixing engagement via 97 fixed to the upper part, and a cleaner guide 96.
Screw holes 98 are formed in a and 96b to be screwed. On the other hand, the cleaner guide 96a is formed with an engagement hole 99 corresponding to the engagement pin 97, as shown in FIG. This hole 99 is formed in an L-shape as shown in the figure. In the figure, 100 is a screw hole for screwing.

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 1, and pulling it out toward the front. For mounting, the operation described above may be performed in reverse.

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

First, the front door (not shown) of the copying machine body is fully opened, the support arm 81 is rotated counterclockwise, and the support members -77,
The transport body 84 is also rotated to open the transport system. When the transport system is in the open state, the support frame 28 is pulled out toward the front door. This pulled out state is as shown in FIG.

Next, the cage positioning lever 65 provided on the pulled out support frame 28 is rotated counterclockwise. As a result, the developing device 8 is moved rightward in the figure (the state shown in FIG. 10) and is separated from the photoreceptor 5 by a large distance. In this state, by removing the screws etc. fixing between the support frame 28 and the mounting member 29 of the photoreceptor 5, the mounting member 29 can be attached to the shaft 3.
1, the locking member 44 can be rotated around the entire center, for example counterclockwise, and the locking member 44 is locked with the locking piece 48 as shown in FIG. 6, and is 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. As a friend, the photoreceptor 5 can be cleaned while being attached to the attachment member 29. At this time, the photoreceptor 5 is rotated during cleaning, and for this purpose it is rotated via the manual knob 32, so that the entire area can be easily cleaned. Since cleaning can be performed while holding the photoreceptor 5 in this manner, there is no risk of staining the surface of the photoreceptor with hand marks, etc., and reliable cleaning is possible.

In addition, when replacing the photoreceptor 5, remove the screw 430 in the state shown in FIG. 6 and turn the lever 43 clockwise in the entire figure. As a result, the D cut 4 of the shaft 30 for holding the photoreceptor 5 is
The 0 portion faces the insertion port 42. Therefore, the entire shaft 30 along the insertion opening 42.

It can be removed from the mounting member 29. Mounting member 29
As shown in FIG. 4, the photoconductor 5 is removed from the flange 37 by removing the fixing member 39 and pulling it out from the flange 37 from the entire axis 3 degrees.
It can be removed from the shaft 30 and replaced with a new one. In this way, the photoreceptor 5 is replaced, and its installation can be easily performed in the reverse manner as described above.

Next, the developing device 8 will be explained. This replacement of the developing device 8 is performed when changing the color of the 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 in the manner described above. In this state, the developer tank 5
The first guide member 54 is the guide body 7 on the support frame 28 side.
■It's off. Therefore, the developing device 8 can be taken out upward. If the developing device 8 is positioned as shown in FIG. 10, rotating the manual knob 72 will release the developing roller 57 and stirring roller 58.5 in the developing tank 51.
9 is rotated, the developer is stirred, and the agitated developer is supplied to the developing roller 57. In this way, manual rotation of the developing roller 57 and the like is possible 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 may damage the surface of the photoreceptor in that area.
It completely prevents the adhesion of excess toner.

To position the developing device 8 to the developing area facing the photoreceptor 5, use the positioning lever 65 in the state shown in FIG.
This is done by rotating the developing device 8 clockwise to move the developing device 8 to the left around the shaft 67. 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)
Open the support arm 81 and hold the heir of the support arm 81.
1i Rotate υ counterclockwise from the state shown in Fig. 11. With this rotation, the support body 77 automatically hangs clockwise around the entire center of the shaft 79, and the conveyor 84 is rotated counterclockwise via the connecting piece 83. As a result, each conveyance path in the paper conveyance system, that is, the conveyance path in the conveyance pel 16 and the conveyance path in the guide plate 85,850 are simultaneously opened as shown in FIG. Therefore, paper money stuck in the conveyance path can be easily removed by opening it. In this case, since each transport path is opened at once, the operation for opening the transport path becomes very simple. Furthermore, since the support body 77 hangs down, the guide plate 72.7
3 is released. For this reason, the guide plate 72.73
It also hangs downward as shown in FIG.

At this time, even if a paper jam occurs while being in close contact with the photoreceptor 5, the guide plates 72 and 73 will hang down due to their own weight.
The paper will be peeled off from the photoreceptor 5. Therefore, jammed paper can be easily handled without touching the surface of the photoreceptor with hands, etc. Furthermore, since the transfer corona discharger 9 attached to the support 77 is also separated from the paper conveyance path, jammed paper can be handled more easily. It gets easier.

Here, since the support frame 28 can be pulled out, if the support frame 28 is pulled out during jam handling, the jammed paper may be torn and stagnated in the conveyance path, or the photoconductor 1
There is a risk of injury.

Even if there are measures to prevent this, if the conveyance path is not opened,
The structure is such that the support frame 28 cannot be pulled out. That is, when handling a jam, the support frame 2
8, the support arm 81i is rotated to open the conveyance system, and the jammed paper is disposed of.

In addition, in the paper conveyance system, a support arm 81i that holds the support body 77 is connected to a conveyance body 84 related to the paper feeding system, and the support arm 81 is configured to release the support body 77 and the conveyance body 84 from the conveyance path at the same time. are taken. According to this, since the entire conveyance path is opened with a single operation, it is possible to easily dispose of jammed paper, etc., as described above. If the jammed paper is disposed of by opening the conveyance system, the conveyance path is restored to the state shown in FIG. 11.

This is carried out by rotating the support arm 81i clockwise. At this time, the supporting body 77' and the conveying body 84 are returned to their original positions at the same time in a single operation, and there is no need to forget to close one of the conveying paths and start the copying operation. In other words, the operation for returning to the normal state becomes very simple.0 Furthermore, in the present invention, the paper conveyance system is The present invention is not limited to this example, and can be applied to all devices other than those in which the main body of a copying machine is separated along a conveyance path. Furthermore, although the synchronous roller IO is provided on the support frame 28 of the process unit, one of the synchronous rollers IO may be opened at the same time as the conveyance path is opened.

Effects> According to the paper conveyance device of the present invention, at least the conveyance path for conveying the paper to the transfer position and the conveyance path for conveying the paper from the transfer position to the next process are opened at the same time.
The conveyance path can be opened with a single operation, making it extremely easy to dispose of jammed paper. In addition, even after clearing a jam, each conveyance path can be returned to its normal state with a single operation.
It is also possible to save money by starting the copying operation while leaving the conveyance path open. Moreover, since the viewing means is also opened at the same time as the conveyance path is opened, it is easy to clear the jam.

[Brief explanation of the drawing]

Fig. 1 is a cross section showing the overall structure of the electrophotographic copying machine according to the present invention, Fig. 2 is a perspective view showing the process unit pulled out from the main body of the copying machine and in good condition, and Fig. 3 is a perspective view showing the recording medium holding structure. Figure 4 shows the configuration of the recording medium? 5 is a side view showing the entire structure of the process unit section, FIG. 6 is a side view showing the recording medium in an open state, and FIG.
The figure 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 drive 3 of the developing device.
A side view of the apparatus showing the system; FIG. 10 is a side view showing the state of attachment and detachment of the developing device in the process unit;
FIG. 11 is a side view showing the paper conveyance system in the present invention;
FIG. 12 is a side view showing the operating state of the transport system in the open position in the present invention, FIG. 13 is a perspective view of the outer appearance of the box of the cleaning device, and FIG. 14 is a fixed part of the cleaning device in the process unit. FIG. 5: Photoreceptor 9: Corona discharger for transfer IO: Synchronous roller Il: Reversal corona discharger for peeling 16: Conveyance belt 17: Fixing roller 23.24.25° 26: Paper feed roller 77: Support 79: Rotation Shaft 81: Support arm 83: Connection piece 84: Conveyor 85.850 Guide plate 86.87: Driven roller for conveyance 88,8
9: Conveyance drive row → Agent Patent attorney Aihiko Fukushi (and 2 others) Figure 1 Figure 8 Out Figure 9 Figure 2 Figure 9

Claims (1)

[Scope of Claims] 1. In order to transfer the image formed on the recording medium, the paper is transported to the image transfer position, and after the image is transferred, the paper is transported from the transfer position to the outside of the apparatus. The apparatus includes a first conveyance path for conveying the paper to the transfer position of the recording medium, and a second conveyance path for conveying the paper further from the transfer position of the recording medium, and means for opening each of the two conveyance paths. 1. A paper conveyance device, characterized in that the releasing means is connected via a connecting means so that both of the conveyance paths can be released simultaneously. 2. The paper transport device according to claim 1, wherein the second transport path is a path for transporting the paper after transfer to a fixing section. 3. The paper transport device according to claim 1 or 2, wherein when the second transport path is opened, a means for transferring an image onto the paper is also opened.