JPH02163228A - Manual paper feeding device - Google Patents

Abstract

PURPOSE:To easily insert sheet materials at the time of manual feeding by providing a pickup roller which is lifted up/down interlocked with the opening/ closing of a shielding member. CONSTITUTION:First, as a user opens a cove 53 to set desired sheets of transfer paper, a pickup roller 51 is supported by a pickup holding member 56 installed on the cover 53. Then, sheets of copying paper are placed on a tray 50 to carry out paper feeding. At this time, the pickup roller 51 is placed in the position of the dashed line, without hindering the paper feeding operation. As the cover 53 is closed after setting the sheets of transfer paper, the device is ready for copying as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a manual paper feeding device, and more particularly to a device fffi that is placed next to the main body of an image forming apparatus and can feed a large amount of paper.

[Conventional technology]

The paper feeding mechanism of conventional image forming apparatuses is: (1) A type consisting of a cassette or a deck into which only transfer paper is inserted from the side (Fig. 1θ).

■A type with a front-loading paper feed unit built into the bottom of the main unit (Figure 11).

■The large paper feed unit is placed on the side, and the operation itself is front loading type.

etc.

[Problem that the invention is trying to solve]

These conventional examples have the following problems.

■ Paper feeding method for cassettes and decks from the side (i) Inserting and removing cassettes requires space in addition to the original space of the image forming apparatus.

(ii) When replenishing transfer paper, remove the cassette (operation → replenishment →
No extra work required to set the cassette.

■If the front loading type is built into the bottom of the main unit, (i) Although there is space on the side, the absolute amount of transfer paper storage is small because the space is limited at the bottom of the main unit.

■If the paper feed unit is placed on the side and the operation is front rope ingestive, (1) The space used will be divided into units.

However, since the transfer paper can be refilled with it pulled out to the front,
It's easier than using cassettes.

Therefore, when compared, configuration ■ seems to be the most advantageous, but
In the case of this configuration, it is not possible to attach a manual feeding mechanism used when using a small number of special papers as is. Placing a large-volume paper feed unit next to the image forming device and having users manually feed the paper from the side would take up too much space, and if the front-loading type was manually fed, the previous user would This is because the disadvantage is that you have to pull out the front-loading type unit each time to determine what size transfer paper or type of transfer paper is inserted. .

Therefore, for example, an apparatus may be considered that is a front-loading type large-capacity paper feeding unit and has a manual feed mechanism attached to its top surface. However, for example, the manual feed mechanism on the top surface has the following disadvantages.

The problem is that the transfer paper is set from above, but the pickup roller used to feed the paper to the paper feed roller gets in the way.

With the front-loading deck type, everything from the paper feed roller to the pickup roller can be left in the main body, so the user can set the transfer paper on the deck without any interference after pulling out the deck.

[Means for Solving the Problems (and Effects)] Therefore, in view of the above-mentioned drawbacks, the present invention provides a device in which the pick-up roller is moved to a position where it does not interfere with sheet material setting by opening the top cover. .

〔Example〕

A unit in which the present invention is implemented will be explained with reference to FIG. For ease of understanding, FIG. 1 shows the slider in a state in which it is immediately removed for jam removal.

In the figure, A is a lower paper feeding unit, and B is an upper paper feeding unit that is slidably supported thereon. In the lower unit, 20 is a deck that moves up and down, and sheet materials are loaded thereon. A paper path 21 guides the sheet material to the bottom opening 33 of the upper unit B.

In the upper unit B, 31.32 is a deck that moves up and down, 34.35 is a pickup roller, 36.37 is a separation roller pair, 38.39 is a conveyance roller, 42.43,
44 and 45 are conveyance paths. Furthermore, C is a manual feeding unit, which is arranged at the top of the upper unit B, and includes a sheet material loading section 50, a pickup roller 51. It has a pair of separation rollers 52 and a transparent opening/closing lid 53. 54 is a support shaft of the opening/closing lid.

Further, the paper feeding unit A is provided with a guide rail 25 on the upper frame 24, and the rollers 40 on the lower surface of the paper feeding unit B are guided. Paper feed unit A has casters 14
It is supported on the side surface of the copying machine main body 15. Normally, after placement, it is locked to the main body by a locking means and fixed in position.

Unit B is similarly locked to the main body and fixed in position. Deck 20, 31.32 are each Accuride al,
It is slidably supported by a2 and can be pulled out in a direction perpendicular to the paper plane of FIG.

Therefore, the door is on the front side, and by opening the door, the decks 20, 31, 32 can be pulled out and sheet materials can be replenished. Therefore, jamming in the deck can be done by opening the door and lowering the middle plate to lower the loaded sheet material.

When feeding paper from the deck 20 of unit A located at the bottom of the large capacity paper feeding unit, the pickup roller l
The transfer paper 2 is fed to a paper feed roller 3. Here, the sheets are reliably separated one by one and transported to the upper standby roller 4 and the lower standby roller 5.

Then, when the size of the transfer sheet in the lower stage A is selected, the sheet is directly sent to the registration roller pair 6 of the copying machine main body 15 (description of the main body copying process will be omitted), an image is formed on it, and it is ejected. 30 is a photosensitive drum.

Next, when the paper is fed from the deck 21 or 22 of the other paper feeding unit B, it is all fed to the upper conveyance roller pair 7, and guided to the registration roller pair 6 portion of the main body.

If a jam occurs here, the present invention adopts the following configuration.

That is, the guides 8, 9, and the lower standby roller 5 are left on the main body side, and the guides 10, 11, and the upper standby roller 4 are attached to the sliding side of the large-capacity paper feeding unit. With this configuration, as shown in FIG. 1, even if the upper sliding amount of the paper feeding unit is insufficient, the jam can be easily cleared.

That is, since the roller pair 4.5 on which the transfer paper is to be held is separated, and the paper bus itself is completely divided,
There is no need to forcefully remove the transfer paper.

Next, another example will be given. This is an example in which all guides are left on the main body side. That is, in this case, if the paper is fed from the lower deck, the guides 10, 11 will be a great hindrance to clearing the jam.

Therefore, a structure was adopted in which it is oscillated as shown in FIGS. 4 and 5.

That is, guide lO' (lower guide of upper pal P)
The guide 11' (upper guide of the lower path P2) and one roller 4' of the pair of standby rollers are integrally supported so as to be swingable.

The interval of the path P2 by the guide 11' is equal to the distance between the standby roller pair 4.
', 5 are maintained by contacting each other with their own weight. The rollers 4', 6 may be pressed by weak springs. Alternatively, the roller 4'5 may be pressed by a strong spring and a pressing force release mechanism may be provided separately.

The standby roller 5 is a driving roller, and the roller 4' is a driven roller. The function of the pair of standby rollers 4' and 5 is to temporarily stop and wait the sheet material fed from the paper feed section, and is effective when the distance from the paper feed section to the registration roller 6 is long. It is possible to increase the speed by starting the sheet material from the positions of the standby rollers 4' and 5 by inputting a paper feeding command.

In the above configuration, when the sheet material jams in the path P2, the guide 10' is moved in the direction of the arrow as shown in FIG.
11' to expand the space. In the case of the upper path P1, the space is sufficiently wide in the state shown in FIG. 4, so it can be easily processed. This swinging fulcrum may be placed anywhere, but it is more effective to locate it at the tip of the guide 10' (near the registration roller) because the amount of swinging will be greater.

This configuration has the following advantages.

■If a jam occurs in the upper paper feed section, slide the paper feed unit (
After letting the material (above) escape to the side, you can handle it by inserting your hand diagonally above.

(2) The lower part can be processed by swiveling the unit of the guide 10° 11 and the upper standby roller 4 upward after releasing it in the same way.

Naturally, since the paper does not have to be processed while being held between standby rollers, the paper jam can be easily processed.

Next, a lid 53 is attached to the manual feed section C, and when the user actually wants to use it, he opens the lid 53 and sets the desired transfer paper. After that, by closing the lid 53 and selecting manual feeding on the main body side operation section, the pickup roller 51 starts feeding the paper.
The paper passes through the paper feed roller pair 55 and the transport rollers 39 and 7, and is fed to the registration roller 6 section of the main body.

After the main body 15 side detects this transfer paper, it is controlled and conveyed so as to match the leading edge of the original image, which is the same process as in a normal image forming apparatus.

It should be emphasized again here that in this embodiment, the manual feed section must be on the top surface of the paper feed unit. Preferably, the lid is transparent or at least has a translucent lid.

Unlike other tray sections, in the case of a manual feed section, the transfer paper used is likely to be limited to the user's own use. Therefore, it is almost always the case that the user sets the transfer paper by himself or herself and disposes of the remaining transfer paper after copying is completed.

Therefore, the above-mentioned conditions are essential because 1) it is possible to instantly determine whether transfer paper is currently set, 2) it is in a position that is as easy to set as possible, and 3) it is possible to know the remaining number after setting it and even while copying. It turns out that it is.

Also, the reason why a lid is necessary is to prevent foreign matter from entering. Due to its nature, there are many metal objects such as staples and clips that hold documents in place in the paper feed section of an image forming apparatus. If these things get into the paper feed section, they will either be fed at the same time as the transfer paper and get stuck between the guides, causing a so-called jam, or if they get into the main body, they can damage the photoreceptor or get into the charger, etc., causing a leak. It's even dangerous.

Therefore, the manual feed mechanism of the embodiment of the present invention, which must be on the top surface, naturally requires a transparent or translucent lid.

By carrying out the present invention as described above, l) Transfer paper, which is conventionally used in large quantities, can be set on a front-loading type deck (the advantages of the front-loading type are described above).

2) When using a small number of special papers (second original, 0f (P paper, colored paper, etc.)), they can be set regardless of when other decks are feeding or stopping.

3) It is easy to identify the transfer paper left by the previous user.

4) You can check the remaining amount of transfer paper you set yourself even while copying.

etc. benefits can be obtained.

The user first opens the lid 53 to set the desired transfer paper.

At this time, the pickup holding member 56 attached to the lid 53
The pickup roller 51 is supported by.

The support member 57 is configured to be lifted over the bin 58. Naturally, this bin 58 is normally placed in the elongated hole on the holding member 2 side so as not to cause any trouble when the pickup roller 51 is moving up and down while feeding the transfer paper. In this figure, a wire 59 is attached to the bin 58, and the vertical movement of the pickup roller during the feeding operation is operated by a plunger 60.

When the user opens this lid 53, he can simply place the transfer paper on the tray 50 without making any further actions.

At this time, since the pickup roller 51 is at the position indicated by the dashed line, it is clear that there is no problem.

Then, after setting, if the lid 53 is closed, the copying is possible. When copying is on, the pickup 51 is rotated clockwise by a drive (not shown), and the sheets are reliably separated one by one by the separation feed roller 55 and sent to the main body.

Next, other embodiments will be described. As shown in FIG. 7, a plunger 61 and its lever 62 for turning the pickup roller 51 on and off are all mounted on the lid 53.

Therefore, when the user opens the lid 53, it moves to the position indicated by the dotted chain line in FIG. 7, so that there is no problem when setting the transfer paper, as described above.

[Other Examples]

FIG. 8 shows another embodiment, in which conveyance rollers 70, 71 and guides 72, 73 are provided at the lower end of the feeding unit B, and the sheet material is conveyed to the registration roller 6 via the guide G2eG3 of the copying machine main body 15. guide.

According to this embodiment, since the buses are merged into one bus, it is easy to handle jams.

Further, FIG. 9 shows still another embodiment, in which each feeding unit is independently provided with a sheet bath.

Regarding the feeding unit A, conveyance rollers 81, 82 and a bus 83 are provided protruding from the tip, and the bus 81 is provided inside.

For the upper stage of feeding unit B, the conveying roller 94.9
6. A bus 95 is provided protrudingly. Concerning the lower stage of the feeding unit B, transport rollers 91, 92 and a bus 93 are provided protruding from the tip, and a bus 90 is provided inside.

As described above, by implementing the present invention, it has become possible to set and replace transfer paper in the manual feed section without requiring the user to make any unnecessary movements. Of course, the present invention is not limited to the explanatory drawings, but the point is that in a paper feeding mechanism equipped with an opening/closing member (lid), the member and the pickup roller section may move together or in conjunction with each other.

[Effects of the Invention] Since the manual sheet feeding device according to the present invention has the above-described mechanism, it has the effect that sheet material can be easily inserted during manual feeding operation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention in which the upper unit is slid to clear a jam; FIG. 2 is a cross-sectional view of the large-capacity paper feed unit attached to the main body of the image forming apparatus; The figure is a cross-sectional view of another embodiment of the present invention in a slid state, Figures 4 and 5 are enlarged operation explanatory views of the main parts of Figure 3, and Figure 6 is a detailed view of the manual paper feed section. , FIG. 7 is a detailed view of another embodiment of the manual paper feed section, FIG.
FIG. 9 is a sectional view of still another embodiment, and FIGS. 10 and 11 are sectional views of a conventional example. A, B...Paper feed unit C...Manual paper feed unit 53...Lid station Figure 4 Figure Mo 5

Claims (1)

[Claims] (1) In a manual sheet feeding device, a shielding member that can be opened and closed is provided on the top surface of the sheet feeding device, and after opening the shielding member and installing a sheet material, the sheet can be fed after closing the shielding member. A manual paper feeding device characterized in that the shielding member and a pickup roller for feeding paper are connected, and the pickup roller moves up and down in conjunction with opening and closing of the shielding member.