JPS60258030A - Jam handling device - Google Patents

Abstract

PURPOSE:To remove a jammed paper sheet in a narrow space by freely opening closing a part of a sheet transport mechanism, interlocking with the opening and closing of plural doors mounted on the base of an apparatus, which can be freely opened and closed. CONSTITUTION:An apparatus 1 is erected at a right angle to the posture of the apparatus during operation, and a lever or a button is operated to open a paper feed cassette 10 and a support plate 24 at respective designated angles. At this time, a paper discharge tray 18 is made level through a hinge portion 19 to be accomodated in a space between legs 21, 22, whereby falling of a document table 8 can be prevented and a jammed sheet can be removed easily.

Description

[Detailed description of the invention] purpose of invention The present invention relates to a copying apparatus such as an electrophotographic copying machine.

The present invention relates to a main body opening/closing mechanism when the main body of the apparatus is left in a non-operating state or when there is an abnormality related to the copying operation of the apparatus.

Conventionally, this type of copying apparatus has had to be installed in the same direction when not in operation as in operation, thereby requiring a large usable space.

For example, there have been methods to remove jams in the transfer member or transfer paper in the device by partially releasing the transport section of the main body, or by opening part of the upper part of the main body diagonally, but the processing space is narrow. Therefore, the work cannot be done smoothly.

When moving and transporting the main body, it must be in the same direction as when operating, and this type of device, which is generally finished flat, has poor workability in moving and transporting.

Conventional copying machines have had the above-mentioned drawbacks. In particular, these drawbacks are inconvenient for personal-use copying machines that are portable and maintenance-free.

The present invention aims to eliminate these disadvantages.

Structure of the Invention FIG. 1 is a side view of the main parts of an electrophotographic copying apparatus to which the present invention is applicable.

The apparatus 1 in the figure is a copying apparatus using electrophotography, in which a photosensitive drum 2 having a photoconductive layer provided on a conductive drum base is supported rotatably in the direction of the arrow. Around this drum 2, corona dischargers 3,
A short focus optical element array 4, a developing device 5, a transfer corona discharge device 6, and a cleaning device 7 are provided.

In the copying apparatus described above, the surface of the photosensitive drum 2 is uniformly charged with a predetermined magnetism by the corona discharger 3, and then the document on the document platen 8 that moves back and forth on the main body of the apparatus is illuminated by the lamp 9, and the reflected light is transmitted to the element. The drum 2 is exposed through the array 4 to form a latent image. The formed latent image is developed by a developing device 5, and the developing device is transferred by a transfer corona discharger 6.

The transfer material in the paper feed cassette 1O is supplied by a paper feed roller 11, and is conveyed to the transfer section via a conveyance roller 12 and a timing roller 13. The transfer material that has been transferred is separated by the separating means 14 and sent to the fixing device 16 via the moving path 15.
The paper is sent to the printer, where it is fixed, and then sent out onto the paper ejection tray 18 via the ejection roller 17. The paper discharge tray 18 has a hinge portion 19 . The heat exhaust fan 20 releases the heat inside the device 1 to the outside of the device.

The device 1 has one foot 21 on the bottom and the outer casing on the paper ejection side,
In particular, the intersection of the circular exterior parts has a smooth curved surface.
It has 2. The device 1 also has a handle J23 for transporting or lifting, and also has a hinge part 25 on the support plate 24 on the lower surface of the transport path and the movement path, and a hinge part 26 on the paper feed cassette IO.

Now, FIG. 2 shows how the bottom of the main body of the device 1 is opened and closed.

Hold the handle 23 of the device 1 and stand the device 1 in the right angle direction during operation. The reason for this is the weight of the fuser, etc.
This is because the center of gravity is on the side, and if you stand on this side it will be stable. By operating a lever or button (not shown), the paper feed force cerat 10 and the support plate 24 are opened to a predetermined angle. At this time, the paper ejection tray 18 is
9, it becomes horizontal, fits within the space of the legs J21 and 22, and can prevent the document table 8 from falling.

As a result, the user of the apparatus can replenish the desired number of sheets of transfer paper into the paper feeder 10 using a well-known method, and can also easily clear jams.

Transfer paper? After paper feeding or jam removal, the paper feed cassette 10 and support plate 24 are set in the main body in the same vertical direction as the apparatus 1. The paper feed cassette 10 has a transfer paper holding mechanism (for example, a bar, a claw, a belt, a plate, etc.) (not shown) to prevent the transfer paper from falling. When restarting the copying operation, the device 1 is reinstalled horizontally.

FIG. 3 shows a method for cleaning the inside of the apparatus 1 and disposing of jammed paper. A portion of the transport path and the movement path are opened by a lever or button (not shown). At this time, the paper feed cassette 10 may be opened as if it were integrated with the support plate 24.

Further, as shown in FIG. 4, only the paper feed cassette IO may be opened when only transfer paper is supplied.

In addition, in the event of an abnormality, especially if the transfer paper is jammed between the pair of fixing rollers as shown in Figure 5, it is difficult to eject the jammed paper from the machine without releasing the pressure in the pressure fixing device. However, in a thermal fixing device, if the transfer paper 29 is discharged in the direction of figure A, that is, the normal paper passing direction, without releasing the pressure, the roller surface temperature will drop during jam removal, and the unfixed developer will be offset to the fixing roller 16'. It's disgusting and I don't like it.

Furthermore, when the fuser section is installed downward as shown in Figure 3, it is difficult to eject jammed paper in the direction of rotation of the fixing roller (normal paper feeding direction), and it is difficult to eject jammed paper in the direction opposite to direction A, as well as the above-mentioned offset problem. If the pressure between the rollers is released at this time, the jammed paper can be easily disposed of.

FIG. 6 shows an example of a copying machine without a paper feed cassette.

In the wooden mounting R1', the fixing device 16'' has a rigid heavy roller and functions as a pressure monitoring device.

Examples of the roller material include metals and ceramics.

The center of gravity of this apparatus 1' is located near such a fixing device, and is an example of the above-mentioned apparatus having a center of gravity on the paper ejection side. This device 1'
For example, by releasing the lever 31 supporting the main body from the main body, the main body is kept approximately horizontal, and normal copying operations can be performed. The "handle" 32 can be used as a handle when transporting and moving the main body, but in this case, the transport and moving part of the apparatus 1', which also functions as a paper feed tray when feeding transfer paper, uses a hinge part 33. It is incorporated into the support plate 34 through the support plate 34. Another guide plate 35 is incorporated into the main body via a hinge portion 36.

FIG. 7 shows an example in which the support plate 34 of the present apparatus 1' is opened during jam processing. The "leg"22' has, for example, a hinge part, and can rotate around this hinge part. The movement of the paper discharge tray is the same as described above. As shown in the figure, the movement +1 conveyance section that is released by a predetermined angle can facilitate the jam removal work.

Effects of the Invention The present invention provides a method for replenishing transfer material to the paper feed section when loading electrophotographic copies, for example, when the center of gravity of the device is on the paper ejection side due to the weight of the fixing device on the paper ejection side. time, conveyance path,
When handling jammed paper on the moving path and during maintenance such as cleaning the inside of the device, stand the main body in a stable direction (that is, stand it up with the paper ejection side facing down), and place the mechanisms and parts necessary for the above operations horizontally or on a flat surface. By releasing in the near direction, it was possible to facilitate the processing operation.

Further, there are no particular limitations on the mechanism, the opening/closing mechanism of the part, and the method of supporting the released item.

Furthermore, it goes without saying that space can be saved by standing the apparatus with the paper discharge section facing downward when the apparatus is not in operation or when being transported.

The installation direction and the opening/closing direction of the main body are not limited to these, and for example, the main body may be raised so as to face the bottom or the front side during operation. l,

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the present invention, Figures 2 and 3
4 is a sectional view of an embodiment of the present invention, FIG. 5 is a partially enlarged sectional view, and FIGS. 6 and 7 are sectional views showing other embodiments. In the figure, 10 is a paper feed cassette, 24 and 34 are support plates, and 32 is a handle. Applicant Canon Co., Ltd.

Claims (2)

[Claims] (1) In a device in which a sheet conveyance mechanism that forms a sheet conveyance path is disposed near the bottom of the main body, a plurality of doors that can be opened and closed are provided at the bottom of the device, and the sheet conveyance mechanism is linked to opening and closing in front of the device. A jam processing device characterized by a part of the jam handler being able to be opened and closed. (2) The jam disposal device according to claim 1, wherein when the bottom door is opened, the bottom is a surface perpendicular to the eaves of the device.