JPH0323460B2 - - Google Patents

Description

Cassette cover 39 that also serves as a paper feed chute A manual paper feeding device characterized by comprising:

[Detailed description of the invention]

The present invention relates to a manual paper feeding device in an electronic copying machine.

FIG. 1 shows an example of a conventional electronic copying machine. When copying with this electronic copying machine, a start button (not shown) is pressed. Then, the photosensitive drum 1 rotates in the direction of the arrow, and its surface is charged by the charger 2. Further, the platen glass 3 is reciprocated in the direction of the arrow along with the document 4 and the platen cover 5 at a predetermined timing. At this time, the original 4 is illuminated by the lamp 6, and the reflected light is reflected by the collective optical system 7.
An image is formed on the photosensitive drum 1 via the electrostatic latent image. The collective optical system 7 consists of rod-shaped lenses that are parallel to each other, closely spaced, and arranged in two rows in a staggered manner, and forms an image that is the same size and whose top, bottom, left, and right are not reversed (erect, same-magnification image). It's becoming like that. The electrostatic latent image is developed with toner particles at a location facing the developing device 8, forming a toner image. On the other hand, the copy paper 10 stored in the paper cassette 9 is moved by a feed roller 11 rotating in the direction of the arrow.
The paper is sent out below the photosensitive drum 1 via a paper guide 13 with a register roller 12 interposed therebetween. This sent copy paper 10
Then, the toner image on the photosensitive drum 1 is transferred by the action of the transfer device 14. The copy paper 10 after transfer is
It is peeled off from the photosensitive drum 1 by the conductive belt 15 running in the direction of the arrow, sent to the fixing device 16 and fixed thereon, and then discharged onto the discharge tray 17 . Toner particles remaining on the surface of the photosensitive drum 1 are neutralized by a static eliminator 18 and then cleaned by a cleaning device 19 .

By the way, in such an electronic copying machine, by replacing the paper cassette 9 with another one, it is possible to easily set copy paper 10 of a different size. However, even when using such an electronic copying machine to copy one or two sheets of copy paper of different sizes, the paper cassette 9 must be replaced, which is inconvenient. Therefore, some conventional electronic copying machines, as shown in FIG. 1, are capable of copying onto copy sheets of different sizes with a paper cassette 9 loaded. In this electronic copying machine, above the feed roller 11, a chute 20 for manually feeding copy paper, a sub-feed roller 21, and a paper guide 22 are provided. When copying onto copy paper of different sizes with this electronic copying machine, use the chute 20.
It is inserted below the sub-feed roller 21 through the. Then, a sensor (not shown) detects this, and the sub-feed roller 21 starts rotating in the direction of the arrow. As a result, copy sheets of different sizes are sent out by the sub-feed roller 21 and sent below the photosensitive drum 1 via the paper guide 13 with the register roller 12 interposed therebetween, and are then copied in the same manner as in the normal case described above. will be held.

However, in such an electronic copying machine, since the chute 20 is provided above the feed roller 11, a space is required for the chute 20, and this also becomes an obstacle when replacing the paper cassette 9. Furthermore, since a chute 20 is required, the cost is correspondingly high. There is also a type in which the chute 20 is detachable, but with this type, the chute 20 has to be attached and detached, which is troublesome, and the detached chute 20 has to be stored, which is also troublesome. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a manual paper feeding device that can manually feed copy paper with a simple configuration without providing a dedicated chute for manually feeding copy paper. purpose.

In the present invention, a paper cassette is rotatably provided with a cassette cover, which is opened and used as a chute for manually feeding copy paper, thereby achieving the above-mentioned object.

The present invention will be explained in detail with reference to Examples below.

FIG. 2 shows an electronic copying machine to which an embodiment of the present invention is applied. In this figure, parts with the same names as those in FIG.

In this electronic copying machine, exposure and development are performed in one rotation of the photosensitive drum 1 in the direction of the arrow, and transfer and cleaning are performed in the next rotation. Development and cleaning are performed by a development/cleaning device 31. On the other hand, the copy paper 10 stored in the paper cassette 9 is sent out by a feed roller 11 rotating in the direction of the arrow.
The fed-out copy paper 10 is reversed approximately 180 degrees by a paper guide 13 with a register roller 12 interposed therebetween, and then sent below the photosensitive drum 1, where transfer is performed. The copy paper 10 after the transfer is peeled off from the photosensitive drum 1 by the strip finger 32, sent to the fixing device 16 via the paper guide 33, fixed thereon, and then discharged to the discharge tray 17.
The fixing device 16 and the discharge tray 17 are provided above the paper cassette 9 loaded into the main body 34 of the copying machine.

The paper cassette 9 includes a cassette main body 35 that is open at the top, a sheet metal paper plate 36 rotatably provided inside the cassette main body 35, a bar spring 37 that biases the cassette upward, and a cassette main body 35. It consists of a magnet 38 provided on the bottom plate of 35 and a claw member (not shown) for preventing paper double feeding. The paper cassette 9 is provided with a cassette cover 39. As shown in FIG. 3, the cassette cover 39 consists of a rectangular cover main body 40, an arcuate paper guide section 41 provided at the tip of the cover main body 40, and a roller escape notch 42 provided therein. It's summery. The cassette cover 39 is rotatably attached to a bearing 43 provided at the upper part of the side plate of the cassette body 35 via a pin 44. Attachment portions 45 are provided at predetermined locations on both sides of the cassette cover 39 at appropriate inclinations, and magnets 46 are attached to these attachment portions 45 .

When storing the copy paper 10 in the paper cassette 9, the cassette cover 39 is opened outside the copying machine main body 34 as shown in FIG. In this state, the paper plate 36 is pushed down against the force of the bar spring 37 and is attracted to the magnet 38. As a result, the paper plate 36 is held substantially along the bottom plate of the cassette body 35. In this state, the copy paper 10 is placed on the paper plate 36, and then the cassette cover 39 is closed as shown in FIG. This completes the storage of the copy paper 10.

When loading the paper cassette 9 into the copying machine main body 34, the feed roller 11 and sub-feed roller 21 can be avoided by the notch 42 of the cassette cover 39. For this reason, the cassette cover 3
Even if the paper guide portion 41 of the paper cassette 9 protrudes above the paper cassette 9, no problem will arise. When the paper cassette 9 is loaded in the predetermined position, the copying machine main body 34
A protrusion 47 provided on the cassette body 35 relatively enters a hole provided on the bottom plate of the cassette body 35 and projects therefrom. Then, the paper plate 36 is pushed up and the magnet 38
It is moved upwardly by a bar spring 37. As a result, the copy paper 10 is pressed against the feed roller 11, and loading of the paper cassette 9 is completed. In this state, the magnet 46 of the cassette cover 39 is located outside the copying machine main body 34.

When copying on one or two sheets of copy paper of different sizes with this electronic copying machine, open the cassette cover 3 of the paper cassette 9 loaded at that time.
Open 9. Then, the paper guide section 41 pushes down the leading end of the copy paper 10 against the force of the bar spring 37, thereby separating it from the feed roller 11. At this time, the cassette cover 39 and the copy paper 1
Since the contact portion with 0 moves along the arcuate surface of the back surface of the paper guide section 41, the copy paper 10 can be pushed down smoothly and there is no risk of damaging the copy paper 10. Subsequently, the cassette cover 39 is further opened and the magnet 46 is attracted to the copying machine main body 34. As a result, the cassette cover 39 is held in an appropriately inclined state. In this state, the cassette cover 39 is in contact with the sub-feed roller 21, and its paper guide portion 41 is located below the feed roller 11. Therefore, copy sheets of different sizes are inserted under the sub-feed roller 21 via the cassette cover 39. Then, a sensor (not shown) detects this, and the sub-feed roller 21 starts rotating in the direction of the arrow. This allows copy paper of different sizes to be transferred to the sub-feed roller 2.
1 and is guided by the paper guide section 41 of the cassette cover 39 to the feed roller 11.
passes below. The copy paper that passes through this
Paper guide 13 with register roller 12 interposed
The photosensitive drum 1 is sent to the lower part of the photosensitive drum 1, and copying is performed in the same manner as in the normal case described above.

Normally, the paper cassette 9 has a constant size regardless of the size of the copy paper. Therefore, even if the loaded paper cassette 9 contains small-sized copy paper, the cassette cover 34 can be used to feed large-sized copy paper as well.

In the above embodiment, the magnet 46 is used to hold the cassette cover 39 in the open state, but the present invention is not limited to this, and for example, a detachable locking fitting may be used. Alternatively, the cassette cover 39 may be held in the open state by holding it by hand without using the magnet 46 or the like.

Further, in the above embodiment, the ejection tray 17 is provided on the loading side of the paper cassette 9, but the present invention is not limited to this, and it may be provided on the opposite side as in the conventional example shown in FIG. In this way, the paper cassette 9 can be easily replaced.

As described above, according to the present invention, the cassette cover of the paper cassette can be used as a chute for manually feeding copy paper, so a dedicated chute is not required. Therefore, space can be used effectively and costs can be reduced. Furthermore, since it is only necessary to open the cassette cover, the operation is easy and there is no need to specially store it. Furthermore, since the distal end of the cassette cover is formed into an arcuate paper guide section, the copy paper can be pushed down smoothly by the back surface of the paper guide section.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing an example of a conventional electronic copying machine, Fig. 2 is a longitudinal sectional front view of an electronic copying machine to which an embodiment of the present invention is applied, and Fig. 3 omits a part of the paper cassette. FIG. 4 is a longitudinal sectional front view showing another state of a part thereof. 9...Paper cassette, 10...Copy paper, 11
... Feed roller, 21 ... Subfeed roller, 34 ... Copying machine main body, 35 ... Cassette main body, 36 ... Paper plate, 39 ... Cassette cover, 40 ... Cover main body, 41 ... Paper guide section.

Claims (1)

[Claims] 1. Paper cassette 9 loaded into the copying machine main body 34
a feed roller 11 which is provided in the copying machine main body and feeds out the copy paper stored in the paper cassette; A paper guide section 41 is formed, and when the paper guide section 41 is opened, a hand is used to push down the copy paper in the paper cassette and separate it from the feed roller with the back side of the paper guide section.