JPH0352749Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a large-capacity paper feeding device with a manual feeding function.

[Technical background of the invention]

Generally, in a copying machine, a paper feed cassette containing sheets of paper is inserted into a mounting opening of the main body of the copying machine, and a paper feed roller takes in the papers in the cassette one by one.

Such paper feed cassettes are required to be lightweight and compact because they are used by being attached and detached depending on the paper size. For this reason, the amount of paper that can be stored at one time is limited, and depending on the paper size, paper must be frequently replenished, which is troublesome. Particularly when copying a large amount at once, it is necessary to replenish paper frequently during the process.

Therefore, a paper feeding device containing a large amount of paper is attached to a normal cassette mounting slot or a specially provided mounting slot in the main body of the copying machine, thereby reducing the number of times paper needs to be replenished.

[Problems with background technology]

In such a large-capacity paper feeding device, since the distance from the mounting opening to the paper feeding roller provided in the mounting opening is long, a feeding roller is provided on the stacked paper, and a sensor is provided near the paper feeding roller. When the sensor detects that there is no paper under the paper feed roller, the feed roller feeds the paper to the bottom of the paper feed roller.
A paper feed roller always supplies paper to the copying section.

For this reason, if it is attempted to provide a manual feeding function to such a paper feeding device, the paper fed to the paper feeding roller will be sent to the copying section along with the manually fed paper, resulting in double feeding.

[Purpose of invention]

This idea is based on the fact that paper that is automatically fed to a paper feed rotary body such as a paper feed roller in a loading slot provided in a copying machine is supplied to the copying section along with the manually fed paper by the paper feed rotary body during manual feeding. To provide a paper feeding device capable of reliably manually feeding paper.

[Summary of the idea]

This invention includes: an automatic paper feed path that guides paper fed from a feed rotation body to a paper feed rotation body in a mounting opening provided in a copying machine; a manual paper feed path that guides manual paper to the paper feed rotation body; A restraining means is provided to restrain the paper that is delivered to the automatic paper feeding path when the paper is manually fed, so that reliable manual paper feeding can be performed.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings.

As shown in FIG. 1, the paper feed device 1 of this embodiment
is equipped with a coupling part 2, a storage part 3 for storing paper P on a paper feed tray that moves up and down, and a cover 4 that opens and closes when loading and unloading the paper P. Mounting port 6 provided in the main body 5
The hopper 7 is attached to the main body 5 of the copying machine, and is supported by a hopper 7 attached to the main body 5 of the copying machine.

By the way, the copying machine main body 5 is provided with a mounting port 6 in which the paper feeder 1 is mounted and a mounting port 9 in which a normal paper feeding cassette 8 having a small storage capacity is mounted. In addition, a paper feed rotary body such as a paper feed roller 10 and sabaki rollers 11 and 12 are provided in the mounting opening 6.
The paper P or manual paper S stored in the paper feeder 1 is separated one by one and supplied to the copying section. Furthermore, there is a manual paper S in the mounting port 6.
An optical manual feed sensor 13 using, for example, a lever is provided to detect the supply of the paper.

The coupling portion 2 is provided with a paper feed guide 16 that guides the paper P fed out by a feed-out rotating body provided in the storage portion 3, such as a feed-out roller 14, to a paper feed plate 15.

A spring 17 and a solenoid (plunger) 18 are attached to the paper feed plate 15, and in the vicinity thereof, an optical paper detection sensor 19, for example, serves as a detection means for detecting the presence or absence of paper engaging the paper feed roller 10. is provided, and when the sensor 19 detects that there is no paper P under the paper feed roller 10, the feed roller 4 rotates to feed the paper P, and the solenoid 18 is energized to lower the paper feed plate 15. When the paper P reaches the sensor 19, the paper feed plate 15 rises after a predetermined time to sandwich the paper P.

Furthermore, a manual feed guide 20 is rotatably provided opposite the paper feed guide 16 as a first-out paper restraining means. This manual feed guide 20 rotates around a support part 21 shown in FIG. A relief portion 23 of the feed plate 15, a relief portion 24 of the manual feed sensor 13, and a side plate 25 for guiding the manual feed sheet S are attached.

Note that the paper feeding rotary body and the feeding rotary body are not limited to rollers, and may be belts or the like.

In the above configuration, this paper feeding device 1 operates as follows.

First, as shown in FIG. 3, if the paper P is not fed out while the coupling part 2 is inserted into the mounting port 6, the paper detection sensor 19 does not detect the paper P, so the feeding roller 4 rotates. As the top paper P of the laminated paper is fed out, the solenoid 18 is energized and the paper feed plate 15 is lowered. The paper P passes along the paper feed guide 16 and the manual feed guide 20 to the sensor 1.
9, the paper feed plate 15 rises after a predetermined time and the paper P is sandwiched therein, and the paper feed standby state is established.

When a paper feed command is issued, the paper feed roller 10 rotates, and the paper P that is waiting to be fed is transferred to the sabaki roller 1.
1 and 12, where it is reliably separated into one sheet and supplied to the copying section. When the rear end of the paper P passes the sensor 19, the feed roller 4 rotates to feed the paper P, and the paper P is held between the paper feed roller 10 and the paper feed plate 15. That is, the paper P is always supplied to the paper feed roller 10 so that it can be fed at any time.

In this state, the paper S is
When manually feeding the paper, manually rotate the manual feeding guide 20 upward. As a result, the presser foot 22 presses the paper P.
hold down. Then, insert the manual feed paper S into the manual feed guide 20.
When the paper S is inserted into the mounting opening 6 along the side plate 25 of the paper S, the paper S comes into contact with the manual feed sensor 13. As a result, the paper feed roller 10 rotates after a predetermined period of time, and the manually fed paper S is drawn in. that time,
Since the paper P is held down by the holding part 22, it is not pulled in.

After manually feeding the required number of sheets in this manner, when the manual feeding guide 20 is pushed down, the original automatic sheet feeding becomes possible.

As described above, according to this embodiment, the paper feed guide 16 that guides the paper P fed from the feed roller 14 to the paper feed roller 10 is provided, and when the paper S is manually fed, the paper feed guide 16 is inclined toward the paper feed roller 10 side and is fed. paper guide 16
A manual feed guide 20 that presses the upper paper P with its leading edge and guides the manual paper S to the feed roller 14 is rotatably provided opposite the paper feed guide 16, so that the feed roller 14 automatically moves the paper to the feed roller 10. The supplied paper P is not taken into the interior by the paper feed roller 10 together with the manual paper S during manual feeding, and only the manual paper S can be reliably fed.

Further, when the manual feed guide 20 is lifted and tilted, the mouth opens on the storage section 3 side, so that even if a paper jam occurs in the coupling section 2, the paper P can be easily removed.

One embodiment of this invention has been explained above,
This invention is not limited to the above embodiments.

For example, as shown in FIG.
A manual feed guide 26 is connected with a hinge 27, and a stopper 28 and a solenoid 2 are attached to the manual feed guide 26.
9 is installed, and when the manual paper S contacts the manual paper sensor 13 during manual feeding, the solenoid 29 operates to pull down the manual paper guide 26, and the stopper 2
8 may hold down the paper P, and the paper feed roller 10 may rotate to draw in the manually fed paper S after a predetermined period of time.

[Effect of idea]

According to the paper feeding device according to the present invention, the presence or absence of paper is detected at the position of the storage unit equipped with the feeding rotary body that sequentially feeds out the sheets and the paper feeding rotary body provided inside the mounting opening of the main body of the image forming apparatus. and a coupling part which is provided with a detection means and which guides the paper inserted into the mounting opening and fed out in response to a paper out signal from the detection means to the position of the paper feed rotary body to prepare the paper for first feeding at all times. In the paper feed device, the coupling portion includes an automatic paper feed path that guides the paper fed by the feed rotor to the paper feed rotor, and a manual paper feed path that guides the manual paper to the paper feed rotor. The structure includes a first-out paper restraining means that restrains the first-feeding paper to the paper-feeding rotor and prevents the paper from being fed to the image forming apparatus when the paper is manually fed. To obtain a paper feeding device in which manual paper feeding is performed reliably and preferentially without the need for the first-out paper that has already been automatically fed to the main body side to be fed to the main body side by the paper feeding rotary body together with the manual paper paper. I can do it.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention, with Figure 1 being a sectional view showing the overall configuration, Figure 2 being a perspective view of the manual feed guide, and Figures 3 and 4 explaining the operation. It is a diagram. FIG. 5 is a partial sectional view showing a modification of this invention. DESCRIPTION OF SYMBOLS 1...Paper feeding device, 2...Coupling part, 3...Accommodating part, 5...Copying machine main body, 6...Mounting port, 10...
Paper feed roller, 13...Manual feed sensor, 14...Feeding roller, 15...Paper feed plate, 16...Paper feed guide, 19...Paper detection sensor, 20...Manual feed guide, 22...Press section, 25 ... Side plate, 26 ... Manual feed guide, 27 ... Hinge, 2
8... Stoppa.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A storage unit that stores sheets in a stack and is equipped with a feeding rotary body that sequentially feeds out the laminated sheets, and a paper feeding rotary body inside a mounting opening provided in the main body of the image forming apparatus. A detection means for detecting the presence or absence of paper at a position is provided, and the paper inserted into the mounting slot and fed out in response to a paper out signal from the detection means is guided to the position of the paper feed rotary body. , a paper feeding device comprising a coupling part that always prepares paper for advance feeding to an image forming apparatus, wherein the coupling part is provided with an automatic paper feeder that guides the paper fed out by the feeding rotary body to the paper feeding rotary body. and a manual paper feed path that guides manual paper to the paper feed rotary body, and when manually feeding paper, the paper that has been previously fed to the position of the paper feed rotary body by the feed rotary body is A paper feeding device characterized by comprising a first-out paper restraining means for restraining paper and preventing it from advancing to an image forming apparatus. (2) Utility Model Registration Scope of the Claims In the paper feeding device according to claim 1, the automatic paper feeding path is a paper feeding guide that guides the paper fed out by the feeding rotating body to the paper feeding rotating body, The manual paper feeding path and the first-out paper restraining means are rotatably provided opposite to the paper feeding guide, and when paper is manually fed, a rear end portion thereof in the paper feeding direction is rotated in a direction away from the paper feeding guide. On the other hand, the manual feed guide is characterized in that its leading end rotates toward the paper feed guide, thereby pressing the paper on the paper feed guide and guiding the manual paper to the paper feed rotation body. paper feed device.