JPS6131338Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic copying machine with an improved structure for taking out a photosensitive drum.

Generally, electronic copying machines that use a photoreceptor drum must be taken out and put in for cleaning and inspection, but in the conventional case, the side cover of the machine was opened and the photoreceptor drum was pulled out by hand and completely removed. It is designed to be removed from the aircraft.
Therefore, when the photoreceptor drum is inserted or removed, there is an extremely high risk that the photoreceptor surface may be touched by hands or the like and get dirty, or it may be scratched by touching it with an object.

Furthermore, in order to open the side cover of the machine body and take out and take out the photosensitive drum, the electronic copying machine must be installed so as to leave a particularly wide space on the external side of the side cover. Moreover, it had the disadvantage that it was difficult to insert and remove the photoreceptor drums because they had to be inserted and removed from the side each time.

The present invention was developed in light of such circumstances, and its purpose is to provide an electronic copying machine that allows the photosensitive drum to be easily inserted and removed during information inspections, etc. by opening the top cover. It's about doing.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings. FIG. 1 shows the external appearance of an electronic copying machine, and 1 is the body of the electronic copying machine. This main body 1
A document support table 4, which is made up of a document supporter 2 and a document cover 3, is provided on the upper surface of the document support table 4, and is capable of supporting the document A and moving back and forth from side to side. Also, aircraft 1
A power switch 5 is provided on the front right side, a print button 6 and a multi-copy selector dial 7 are provided on the right side of the front, and a power lamp 8, a ready lamp 9, a check clamp 10, and an empty lamp are provided on the front of the top. 11 are arranged.

Note that 12 is a copy tray removably attached to the lower left side of the main body 1, and 13 is a detachable paper feed cassette attached with its left end protruding below this tray.

Further, as shown in FIG. 2, approximately in the center of the body 1 is a photosensitive drum 14 which rotates clockwise at a circumferential speed equal to the moving speed of the document support table 4.
is provided, and this photosensitive drum 14
Various devices are arranged radially along the photosensitive surface 14a. One copying process is completed when the photosensitive drum 14 rotates twice. That is, below the photosensitive drum 14, a charge transfer device 15 consisting of a corona discharge device is provided, and on the rotational side thereof, an afterimage erasing device 16, an exposure device 17, and a static eliminating device 18 consisting of a corona discharge device are provided. They are arranged sequentially. moreover,
A developing/cleaning device 19 is provided on the rotational side of the static eliminator 18 and opposite to the exposure device 16, and an auxiliary cleaning device 20 is provided on this rotational side.
is provided.

On the other hand, the exposure device 17 and the paper feed cassette 1
A grasping and conveying device 21 is provided between the photosensitive drum 14 and the charging/transferring device 15, and supplies the copying paper (transfer paper) P taken out from the paper feed cassette 13 between the photosensitive drum 14 and the charging/transferring device 15. A copy paper transport path 22 is formed to carry out the copy paper to the copy receiver 12 side.
Further, a copy paper static eliminator 23 consisting of a corona discharge device and a fixing device 2 are provided opposite to the copy paper transport path 22.
4 are arranged in sequence.

Note that 25 is a toner replenishing device connected to the developing cleaning device 19, 26 is a dust collecting device connected to the auxiliary cleaning device 20, and 27 is a driving device.

On the other hand, an upper cover 29 is installed on the upper surface of the body 1, in addition to the document support table 4, for closing the opening 28 above the photoreceptor drum 14. One end of the upper cover 29 is pivotally attached to the frame 30 of the body 1, as shown in FIG. Then, when the document support table 4 is moved to one end side as shown by the one-dot chain line in FIG. It is now possible to do so. Furthermore, the cover 2
On the inner surface of 9, there is a pair of drawers (extracting means) 31,
31 is attached and fixed so that it protrudes. The pull-out tools 31 , 31 are each provided with hook portions 33 , 33 that lock onto flanges 32 , 32 at both ends of the photoreceptor drum 14 .
It is designed to lock and hold. That is, by opening the upper cover 29, the photosensitive drum 14 can be pulled out together with the pull-out tools 31, 31. Note that even after the photosensitive drum 14 is pulled out as shown in FIG.
It is designed to be able to rotate while being held by the hooks 33, 33 of 1, 31. Therefore, cleaning of the photoreceptor drum 14 is also possible. Further, supports (holding means) 34, 34 are provided to hold the photosensitive drum 14 while being pulled out of the machine. These supports 34, 34 are a pair of arms 3
5 and 35 are pivotally connected, and each other end is pivotally connected to the upper cover 29 and the frame 30, so that the upper cover 29 can be supported or released using a toggle joint action.

As shown in FIG. 4, within the body 1, the photosensitive drum 14 is rotatably supported by a rotating shaft 36 that passes through a bearing (not shown) from the side, and is rotated by a driving means (not shown). It's summery.

Next, a method of using the above-mentioned photoreceptor drum take-out device will be explained. To take out the photosensitive drum 14, remove the side cover of the body 1 and pull out the rotating shaft 36. After confirming that the document support table 4 is retracted from the top surface as shown by the dashed line in FIG. 2, the upper cover 29 is pulled upward as shown by the arrow in FIG. Open as shown in FIG. As a result, the drawer tools 31, 31
The photoreceptor drums 14 that are locked to can be pulled out as one unit. Then, the upper cover 29 is supported by the supports 34, 34 to prevent it from returning. Therefore, even after the photoreceptor drum 14 is pulled out of the machine, it is held by the hooks 33, 33 of the drawer tools 31, 31, and can be rotated while being held, so that the photoreceptor drum 14 can be cleaned as is. .

Further, when loading the photosensitive drum 14, the supports 34, 34 are released, the upper cover 29 is rotated in the direction shown by the arrow in FIG. 5, and the upper cover 29 is closed as shown in FIG. 6. As a result, the photoreceptor drum 14 is located at a predetermined position within the body 1, so that the rotating shaft 36 passing through the bearing of the body 1 is inserted therethrough and is supported by the rotating shaft 36. Thus, the photosensitive drum 14 can be loaded in a state where normal copying operations can be performed.

Note that the upper cover 29 is not limited to being opened and closed manually as described above, but may be opened and closed automatically by a combination of an eccentric cam and a rotating shaft, for example.

As explained above, the present invention provides an upper cover on the upper surface of the machine that can be opened and closed when the document support table is retracted, and the photoconductor drum can be taken out of the machine in conjunction with the opening operation of the upper cover. This is what I did. Therefore, no space is required for pulling out the photoreceptor drum. Incidentally, in the case of a type in which the photosensitive drum is pulled out from the side of the machine body, it is very inconvenient if the circumference is narrow, but according to the present invention, this inconvenience is eliminated and it is easy to take in and out.

Furthermore, since the upper cover is opened when the document support table is retracted, it is possible to prevent the upper cover from being opened inadvertently.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the entire electronic copying machine, FIG. 2 is a front view showing the structure of the electronic copying machine, and FIG. Similarly, FIG. 4 is a perspective view of the photoreceptor drum pull-out device, and FIGS. 5 and 6 are explanatory views of the operation of the photoreceptor drum pull-out device. 1... Body, 4... Document support table, 14...
...Photosensitive drum, 29...Top cover, 31...
Removal means (drawer), 34...holding means (support).

Claims (1)

[Scope of utility model registration request] a machine body in which a photosensitive drum is installed; a document support table provided on the top surface of the machine so as to move back and forth; and a document support table provided on the top surface of the machine during the reciprocating process of the document support table; an upper cover that can be opened and closed when the table is evacuated; a holding means that maintains the open state when the upper cover is opened; An electronic copying machine characterized by comprising a taking-out means for interlockingly taking out a photoreceptor drum outside the machine body and supporting the photosensitive drum in a detachable manner.