JPH0486755A - Image forming device - Google Patents

Abstract

PURPOSE:To feed a long sized original with high efficiency to form an image and to make regular originals interrupt by providing a freely openable/closable upper surface guide covering an upper front part of right and left side guides for mounting of the long sized original provided in an upper part of an original cover means. CONSTITUTION:A long length original feeding unit 120 is constituted of a pair of right and left side guides 121 provided on the upper surface of the original cover means 14, a tractor feeding means 122 provided in back of a main body 1, and the upper surface guide 123 covering at least the upper front part of the side guides 121 being freely openable. Then, the long sized original 17 is rolled out to the tractor feeding means 122 after being passed through the original cover means 14 and the original platen, and the paper Z 17 is fed for one pitch every time exposure is finished by a pin tractor 122b. In this state, the upper surface guide 123 is folded down, and its curved part 123b is prevented from being sprung out in front of the long length original 17 while the long sized original 17 is guided by this as well as by the side guides 121. Thus, the long sized original can be fed with high effeciency and interruption can be carried out by the regular originals.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides an image forming apparatus that can feed a long original document with high efficiency and form an image, and can also interrupt a general original document. Regarding.

(Prior Art) Conventional image forming apparatuses, such as copying machines, can perform continuous copying of ordinary originals that can be handled one by one with extremely high efficiency. In the case of originals, continuous copying is difficult, resulting in poor copying efficiency, and there is also the inconvenience that it is not possible to interrupt the automatic feeding of other originals during the copying process.

However, recently, image forming apparatuses with high processing efficiency that can process long originals with high efficiency and can also be interrupted by automatic feeding of other originals have been developed and put into practical use.

That is, FIG. 5 is a perspective explanatory view of the document supply means 15 in the image forming apparatus having the above-mentioned functions, and one end on the right side when viewed from the operation panel 2 side is provided with a feed section for feeding one interrupt document 16. An interrupt document supply unit 110 for discharging is provided, and a long document supply unit 120 is provided in the front-rear direction with the other end as a reference.

Further, the switching means 1 is connected to the interrupt document supply unit 11o.
There are 50.

The original 16 of the interrupt original supply unit 110 is indicated by the arrow 111.
It enters from a and exits at arrow 11]b.

On the other hand, the original 17 in the long original supply unit 12o enters from the arrow ] 21a and is discharged in the direction of the arrow 121b.

The long document supply unit 12o includes a pair of left and right side guides 122 provided on the upper surface of the document holding device 14, and a tractor feeding device 123 provided at the rear of the main body 1.

The left and right side guides 122 are configured such that the distance between the left and right sides can be adjusted freely, and the long original 17 is a Z sheet that can be folded and stacked, and feeding holes are provided on both sides.

This long original 17 passes between the original pressing means 14 and the original table 12 and is fed out toward the tracker feeding means 123.

(Problems to be Solved by the Invention) The image forming apparatus having the above-described configuration has the advantage of being able to process long originals with high efficiency, and also being able to automatically feed other interrupting originals in the meantime. In particular, when feeding long originals, there has been a problem in that the originals fly out in front of the apparatus, impeding operational efficiency.

That is, as shown in FIG. 6, the long original 17 is placed above the original holding means 14, passes through the gap between the original holding means 14 and the original table 12, and is delivered to the tractor feeding means 12.
3, the document is ejected to the rear of the apparatus, but since it is pulled in the directions of arrows A and B, the document holding means 14 and the document table 1 are ejected.
Before entering between 2 and 2, it floats up as shown and 1
6- It jumps out to the front of the device as shown in the illustration.
Not only do they cover the control panel 2 of the main body of the apparatus, but in some cases they hang down to the front of the apparatus and fall to the floor, so the operator often has to sort out the protruding long originals 16-. It was not necessary, but it caused the problem of poor operational efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of conventional image forming apparatuses.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image forming apparatus that can form an image by supplying long originals with high efficiency and that can also handle ordinary originals.

[Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, the image forming apparatus of the present invention comprises:
A document table on which a document is placed, a document holding device that covers the document table in an openable and closable manner, a document supply device that supplies and discharges the document onto the document table, and an exposure scanning device that guides an image of the supplied document.
In an image forming apparatus that includes an image forming unit that forms an image on an image carrier using this image, the document supply unit includes an interrupt document supply unit that supplies and discharges the interrupt document to and from one end of the document table; A long original supply unit that supplies and discharges the long original across the document table in a direction perpendicular to the feed direction of the interruption original at the end side, and a switching means that gives priority to the interruption original supply unit, The length document supply unit includes left and right side guides for placing a long document provided above the document holding means, and a tractor feeding device arranged at the rear of the document table. It is characterized by having an upper surface guide that covers the cover so as to be openable and closable.

(Function) In the image forming apparatus of the present invention, the long document supply unit is provided with an upper surface guide that covers at least the upper front part of the left and right side guides for placing the long document in an openable and closable manner. The long document fed by the tractor feeding means is prevented from lifting up by the upper surface guide, and the problem of the document flying out in front of the main body of the apparatus is effectively eliminated.

(Embodiment) Hereinafter, an embodiment of the image forming apparatus of the present invention will be described in detail with reference to the drawings.

First, as shown in FIG. 1, the image forming apparatus of this embodiment includes a main body 1, an original supply mechanism 1, and an exposure scanning means 21.
, paper feeding means 31 , image forming means 41 , and paper discharging means 5
1 and a control means (not shown).

In this embodiment, the parts other than the original supplying means 15 in the original supplying mechanism 11 are the same as those of the conventional one, so after an outline of the similar parts will be explained, the original supplying means 15 will be explained in detail.

The main body 1 accommodates various parts, and has openings at the upper end and lower left and right sides, and at the upper front there are an image forming key, a sheet number setting key, and various other input keys necessary for operation.
Also provided is an operation panel 2 equipped with a display and the like.

The document supply mechanism 11 includes a document placing table 12 made of a glass plate that covers the upper opening of the main body, positioning scales 13a and 13b attached to both ends of the document placing table 12, and document holding means 1- provided on the main body 1 so as to be openable and closable. 4, and document supply means 15
The document pressing means 14 holds the interrupt document 16 and the long document 17 placed on the document placing table 12.

The document holding means 14 has a platen sheet housed in a casing forming an outer shell, and can be opened and closed by a lever (not shown), and is capable of supplying and discharging an interrupt document 16 or a long document 17, which will not be described in detail. The apparatus includes a platen sheet operating means for separating the platen sheet from the document table in synchronization with the document table.

The exposure scanning means 21 includes a moving first carriage 2 having a light source body 22a consisting of an illumination device and a reflecting mirror 22b.
2, a second carriage 24 that moves with reflection mirrors 1y-24a and 24b, an imaging lens 25, and a reflection mirror 2.
It consists of 6a, 26b, and 26c.

Then, as the first carriage 22 moves, the light source body 22a
When scanning an interrupted original] 6 or a long original 17 while irradiating it, the reflected light from one of the originals 16 and 17 passes through the reflecting mirrors 24a and 24b of the second carrier 24, which moves at an appropriate speed. The light enters the imaging lens 25, passes through reflection mirrors 26a, 26b, and 26c, and forms an image of the original 16.17 on the photosensitive drum 42.

The paper feeding means 3 supplies the paper P as an image carrier, and is equipped with a manual feed cassette 32 and cassettes 33 and 34, and a pickup roller 32 according to an external signal.
The paper P taken out appropriately by a, 33a, and 34a is
It reaches the aligning roller pair 35 via the feed separation roller pair 33b or 34b, and is sent to the photosensitive drum 42 at an appropriate time.

The image forming means 41 includes the above-mentioned rotating photosensitive drum 42.
Developers 42a, 42b, transfer device 42C1, peeling device 42d, and
A cleaner 42e, a static eliminator 42f, a main charger 42g, etc. are arranged. Further, a conveyor conveyor 43 and a pair of fixing conveyors 44 are provided, and the photoreceptor drum 4 is
The latent image formed on the sheet 2 is visualized by a developing device 42a or 42b, transferred to a sheet P by a transfer device 42c, peeled off by a peeling device 42d, conveyed, and heated and fixed by a pair of fixing rollers 44. The paper is sent to the paper discharge means 51.

In the paper ejecting means 51, the fixed paper P is transferred to a pair of paper ejecting rollers 5.
2 and then stored in the paper discharge tray 53.

A paper discharge detector 54 is provided near the pair of paper discharge rollers 52 to detect the paper to be discharged.

The control means consists of a control device equipped with a CPU,
Controls the entire image forming apparatus.

This concludes the general explanation of the structure and operation of the entire embodiment.Next, the document supply means 15, which is an important component of the embodiment, will be explained.

As shown in FIG. 1, the document supply mechanism 11 includes a document table 12
, positioning scales 13a and 13b, and original holding means 1
4, and a document supply means 15 consisting of an interrupt document supply unit 110, a long document supply unit 120, and a switching means 150.

FIG. 2 is a perspective view of the same, in which an interrupt document supply unit 110 for feeding and discharging interrupt documents 16 one by one is provided at one end on the right side when viewed from the operation panel 2 side, and the other end is provided. A long document supply unit 120 is provided in the front-rear direction as a reference.

Here, manuscripts 16 and 17 are the 5th manuscript mentioned above as a conventional example.
They enter in the same directions as shown in the figure and exit in the same directions.

When an interrupt document 16 is placed on the document tray 111, the interrupt document supply unit 10 is detected by a switching means (not shown), and upon this detection, the long document supply unit 120 is stopped, and the interrupt document supply unit 10 stops. unit 1
10 is activated, that is, an interruption begins, and the original 16 is sent to the original placing table 12 via a pair of feed separation rollers and a pair of aligning rollers (not shown), through a swing gate, and
After being exposed, the document is then stored in the document discharge tray 113.

The document ejection tray 113 includes a document ejection guide 113a,
It is divided into a paper ejection guide stand 113b, and the document ejection guide 113a is made swingable from side to side via a shaft 113c.
When setting the long original 17 or exposing it, the original ejection guide 113a is moved to the original placing table 1 as shown in FIG.
Evade in the opposite direction to 2.

When the original 16 runs out, the switching means detects this, the interrupt original supply unit 110 stops, the long original supply unit 120 starts again, and the interruption ends.

Although not shown, the platen sheet of the document holding means 14 presses the document table 12 during exposure, and separates from the document table 12 when the document 16 is transported.

The long document supply unit 120 includes a pair of left and right side guides 121 provided on the upper surface of the document holding device 14, a tractor feeding device 122 provided at the rear of the main body 1, and at least an upper front portion of the side guide 121 that can be opened and closed. and an upper surface guide 123 that covers the upper surface.

The left and right side guides 121 are configured such that the interval can be freely adjusted.

Further, the upper surface guide 123 includes a flat portion 123a and a front curved portion 123b, and the overall structure may be plate-shaped or may be hollow frame-shaped.

When the long original 17 is to be placed on the upper kite 123, the upper kite 123 is erected rearward as shown in FIG.

The long original 17 is a Z sheet that is folded and stacked on top of each other, and feeding holes are provided on both sides. It is being sent out towards 122.

The tractor unit 122 includes a pair of bin helds 122.
The bin tractor 122b is provided with a tractor drive means 122c for driving the bin tractor 122b, and is positioned and fixed to the main body 1.

Then, the Z paper 17 is fed one pitch at a time by the bin tractor 122b every time exposure is completed.

FIG. 3 shows a state in which a long document 17 is placed between the left and right side guides 121 provided at the top of the document holding means 14. In this state, the top guide 123 is tilted downward and the side guides 121 and guides the long original 17, and the curved portion 123b prevents the long original 17 from jumping out forward.

Therefore, as shown in FIG. 4, the long document 17 is prevented from floating by the curved portion 123b of the top guide 123, so that it does not fly out in front of the main body 1 and hangs down on the top surface of the control panel, etc. It is transported efficiently without any problems.

This concludes the description of the embodiment.

In this embodiment, a Z-shaped paper is used as the long document, but the paper is not limited to this, and may be wound into a roll. Therefore, each document supply unit is not limited to the embodiment.

[Effects of the Invention] As described above in detail, the image forming apparatus of the present invention is provided with a top guide that can open and close at least the front of the upper part of the left and right side guides for placing a long document in the long document supply unit. The long original guided by the side guide and fed by the tractor feeding means is prevented from lifting up by the top guide, effectively eliminating the problem of the document flying out in front of the main body of the apparatus.

Therefore, according to the image forming apparatus of the present invention, long originals do not fly out to the front of the apparatus main body, cover the control panel of the apparatus main body, or hang down and fall to the floor, improving operational efficiency. It is extremely excellent;
It is possible to supply long originals with high efficiency, and to obtain high throughput that allows for the interruption of general originals.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of an image forming apparatus of the present invention, FIG. 2 is a perspective view of an upper part of a document supply mechanism, FIG. 3 is a perspective view of an upper part of a long document supply unit, and FIG. 4 is a side sectional view, FIG. 5 is a perspective view of an upper part of a document supply mechanism in a conventional image forming apparatus, and FIG. 6 is a side sectional view of a long document supply unit.

Claims (1)

[Scope of Claims] A document table on which a document is placed, document holding means that covers the document table in an openable and closable manner, a document supply device which supplies and discharges the document onto the document table, and guides an image of the supplied document. In an image forming apparatus having an exposure scanning means and an image forming means for forming an image on an image carrier using the image, the original supplying means may include an interruption original supplying unit that supplies and discharges an interruption original to a document table from one end thereof. , a long document supply unit that feeds and discharges the long document across the document table in a direction perpendicular to the feed direction of the interruption document at the other end of the document table; and a switching means that gives priority to the interruption document supply unit. The long document supplying unit includes left and right side guides for placing the long document provided on the top of the document holding means, and a tractor feeding device located behind the document table, and the side surface An image forming apparatus characterized by having an upper surface guide which covers at least an upper front part of the guide in an openable and closable manner.