JPH07225507A - Copying device - Google Patents

Abstract

PURPOSE:To provide a copying device capable of permitting the copying irrespective of the thickness of the original and the feeding of a thick original from the front side, improving the operability and reducing the installation space thereof. CONSTITUTION:In order to improve the transport of an original, the exposure scanning face (upper surface of a contact glass 2) is inclined downward in the direction toward the downstream side of the exposure scanning. A copy tray 21 is attachably and detachably fitted, and an entrance preventing member 26 is turnably attached to the side lower than the exposure scanning face, between a second original feeding port B and a transfer paper ejecting port D. At the time of copying a thick original, the copy tray 21 is detached, then an original 15 is inserted into the second original feeding port B for copying. An entrance preventing member 26 is turned by gravity, hence a transfer paper 17 is prevented form being entered into the second original feeding port B and the transfer paper 17 is stacked in a stacker 25. The copy tray may be made rotatably instead of attachably and detachably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying apparatus of a type in which a sheet original is conveyed and moved to be exposed and scanned.

[0002]

2. Description of the Related Art Conventionally, in a copying apparatus of a type in which a sheet original is conveyed and moved to be exposed and scanned, when the original is inserted with the image surface of the original facing upward when the original is conveyed, it is necessary to turn the original once in the original conveying section. is there. For this reason, a thick document causes conveyance failure at the turn portion of the document conveying portion due to the strength of the waist, so that the sheet document is regulated to have a certain thickness or less in the copying apparatus having the turn portion. In order to eliminate this inconvenience, a first original inserting portion for supplying the original image surface of the sheet original upward and a second original inserting portion for supplying the original image surface downward are provided to make the original thin or thin. However, a copying apparatus has been proposed which enables copying without any problems (Japanese Patent Laid-Open No. Hei 1)
-114871). Further, a configuration is provided in which a plurality of discharge units for the discharged transfer paper are provided, one of which is provided above the second document insertion unit, and the guide operation member provided in the second document insertion unit can be switched as the discharge passage formation unit. It has been proposed that the transfer paper be efficiently discharged and that the operability be improved (Japanese Patent Laid-Open No. 1-
114872). Further, a proposal has been made to further improve the operability by switching the transfer paper discharge switching member by means of the guide operating plate (Japanese Patent Laid-Open No. 1-114873).

[0003]

In the conventional copying machine described above, the transfer paper discharge port is provided at the rear of the machine, or a plurality of transfer papers are provided at the upper position of the second document inserting section and the rear position of the machine. Therefore, there is a problem that the operability is not sufficiently good. In addition, the straight transport section for transporting thick originals was installed horizontally on the machine, and the user could not insert the originals from the front, so it was operated behind the machine. Not only is it poor in performance, but there is also the problem that the installation space for the machine becomes large.

An object of the present invention is to make it possible to make a copy regardless of whether the original is thin or thin, and to insert a thick original from the front side to improve operability and reduce the installation space of the machine. The object is to provide a copying apparatus that can do this.

[0005]

SUMMARY OF THE INVENTION A first aspect of the present invention is a copy equipped with an exposure section having an exposure scanning surface for exposing and scanning an original image and a light source, and an original conveying means for exposing and scanning a sheet original. In the apparatus, the exposure scanning surface is inclined downward toward the downstream of the exposure scanning.

According to a second aspect of the invention, an exposure section having an exposure scanning surface for exposing and scanning an original image and a light source, an original conveying means for exposing and scanning a sheet original to the exposure section, and a sheet original to the exposing section. A copying apparatus comprising a document inserting section, a discharge section provided with a discharge port for a transfer sheet after copying is provided behind the document inserting section, and a copy tray for accumulating the discharged transfer sheet. A tray is detachably attached, and a stacker that receives the transfer sheet when the copy tray is removed and an entry blocking member that prevents the transfer sheet from entering the document insertion portion are provided. .

According to a third aspect of the present invention, an exposure unit having an exposure scanning surface for exposing and scanning a document image and a light source, a document conveying unit for exposing and scanning a sheet document on the exposure unit, and a sheet document for supplying to the exposure unit. A copying apparatus comprising a document inserting section, a discharge section provided with a discharge port for a transfer sheet after copying is provided behind the document inserting section, and a copy tray for accumulating the discharged transfer sheet. The tray is supported by a rotation shaft, and the rotation shaft is provided below the exposure scanning surface so that the copy tray is rotated to form a document insertion table when a sheet document is supplied from the document insertion unit. A stacker for receiving the transfer sheet when the copy tray is used as a document insertion table, and an entry blocking member for preventing the transfer sheet from entering the document insertion section are provided. .

[0008]

The exposure scanning surface of the copying apparatus and the document conveying section are conventionally provided horizontally, but in the present invention, they are inclined downward toward the downstream side of the exposure scanning, that is, toward the horizontal. As a result, the conveyance force for thick originals and the load on the machine are reduced due to the weight of thick originals, the conveyance is stable, and the user can easily insert an original into the original insertion section even when the front of the machine is used, improving operability. To do.

According to the present invention, the copy tray can be removed to facilitate insertion of a thick original, and a transfer paper receiving stacker, which is a substitute for the copy tray when the copy tray is removed, is provided below the transfer paper discharge port. Set up in. Further, in order to prevent the transfer paper from entering the original insertion portion when the copy tray is removed, an entry blocking member formed in a substantially V shape is rotatably attached near the transfer paper discharge port. The entry blocking member is oriented so that the transfer sheet enters the copy tray when the copy tray is inserted, and changes its direction by its own weight when the copy tray is removed to prevent the transfer sheet from entering the copy tray.

Further, in the present invention, instead of removing the copy tray, the copy tray is rotatably attached, and the copy tray is rotated so that the copy tray can be used as a document insertion table so that the original can be easily inserted and the operability is improved. It was The entry blocking member is formed in a substantially V shape and is rotatably attached to the copy tray. When the copy tray is used as a copy tray, the transfer blocking member is oriented so that the transfer paper enters the copy tray, and when the copy tray is used as a document insertion table, the transfer paper is turned by its own weight to transfer the transfer paper to the copy tray. Block entry.

[0011]

1 is a sectional view showing a first embodiment of the present invention. A cylindrical photosensitive drum 1 is rotatably provided in the direction of the arrow at the center of the apparatus main body, and a contact glass 2 as an exposure unit is arranged above the photosensitive drum 1. A lamp 3 for illuminating an image of a document traveling on the contact glass 2 between the photoconductor drum 1 and the contact glass 2, and an optical system 4 such as a lens array for focusing the reflected light from the document on the photoconductor drum 1. Are placed. Around the photosensitive drum 1, a charging charger 5, a developing device 6, a transfer charger 7, a separation charger 8, a cleaning device 9, and a charge eliminating device 10 are provided.
Are provided in sequence.

The document conveying means is composed of a front conveying roller 11 and a driven roller provided thereon, a rear conveying roller 12 and a driven roller provided thereon, and is provided on the contact glass 2 and the contact glass. The sheet original 14 or 15 is conveyed on the upper surface of 2. A document supply table 13 which can be placed with the image surface of the sheet document 14 facing upward is provided horizontally in front of the upper part of the machine in front of the document conveying means. After that, the first document insertion portion A that can be inserted between the rear conveyance roller 12 and the driven roller.
Is provided. In front of the document conveying means, there is provided a second document inserting section B between the rear conveying roller 12 and the driven roller, into which the sheet document 15 can be fed without passing through the document turn section 16. This second document insertion section B
Are provided on the same plane as the upper surface of the contact glass 2. The upper surface of the contact glass 2 is the exposure scanning surface.

In the present invention, the exposure scanning surface is inclined downward toward the downstream side of the exposure scanning. Along with this, the second document insertion portion B provided on the same plane as the exposure scanning surface is also inclined at the same angle with respect to the horizontal. This is one of the features of the present invention. In the conventional apparatus, both the exposure scanning surface and the second document insertion portion B are horizontally provided. Thick manuscripts are heavy,
Since the insertion force is larger than that of the thin original, there is a problem that the operability is not good when the second original insertion portion B is horizontal. In the present invention, since the exposure scanning surface and the second document insertion portion B are inclined, the transport force of the thick document and the transport load of the machine are reduced by the weight of the thick document, the transport is stable, and the user is in front of the machine. Even in the case, the original can be easily inserted into the second original insertion portion B, and the operability is improved.

When the sheet original 14 supplied from the first original insertion portion A reaches the exposure portion, the image surface of the sheet original 14 is illuminated by the lamp 3, and the reflected light is reflected by the optical system 4 on the surface of the photosensitive drum 1. Is imaged. The surface of the photoconductor drum 1 is uniformly charged by the charging charger 5 while rotating in the direction of the arrow, and the image from the optical system 4 is formed on the charged surface, and the charge in the non-image portion is removed to form an image. Only the charges of the parts remain, and an electrostatic latent image is formed. This electrostatic latent image is developed with toner by the developing device 6. The toner image comes into close contact with the transfer paper 17 before the transfer charger 7,
Charge is applied from the back surface of the transfer paper 17 by the transfer charger 7, and the toner image is transferred to the transfer paper 17. The transfer paper 1 that was in close contact with the photosensitive drum 1 by the next separation charger 8
In order to separate 7 from the surface of the photoconductor drum, an electric charge opposite to that of the transfer charger 7 is applied from the back surface of the transfer paper 17 to electrostatically separate it. When transfer and separation are completed, the photosensitive drum 1
The remaining untransferred toner is scraped off by the cleaning device 9 and discharged by the charge removing device 10 to have a uniform surface potential. The toner image transferred onto the transfer paper 17 is fixed on the transfer paper 17 by applying heat and pressure by the fixing device 18. When the fixing is completed, the transfer paper 17 is ejected from the paper ejection roller 1.
Copy tray 2 through the transfer paper outlet D by 9 and 20
It is discharged to 1.

As a transfer paper supply means, a manual paper feed section E and an automatic paper feed section F are provided on the front side of the apparatus main body. In the case of manual paper feeding, the paper is fed from the manual feed port of the manual paper feeding section E, and in the case of automatic paper feeding, the paper is fed from the roll 22 to the registration roller 24 by the feeding roller 23, and at this position the sheet document 14 is fed. Or, it is aligned with 15. On the transfer paper 17 sent to the transfer position, the toner on the photoconductor drum 1 is transferred by the transfer charger 7, separated from the photoconductor drum 1 by the separation charger 8, and fixed by the fixing device 18.
Then, the sheet is fixed by and is discharged to the transfer sheet discharge port D by the discharge rollers 19 and 20.

When copying a thin sheet document 14,
A document is inserted from the first document insertion portion A. The document is ejected from the document ejection port C in the front by the front conveyance roller 11 and the driven roller provided thereon, and the rear conveyance roller 12 and the driven roller provided thereon. The transfer paper 17 is discharged to the copy tray 21 through the transfer paper discharge port D.

According to the present invention, the copy tray is detachably attached to the main body of the apparatus, and the copy tray is detached from the main body of the apparatus for copying the thick original so that the thick sheet original can be easily copied with good operability. Two types were devised, a structure and a structure in which the copy tray is rotated and rotated to use the copy tray as a document insertion table. This is another feature of the present invention. The first embodiment deals with the former case.

FIG. 2 is a sectional view of the transfer sheet discharge port of FIG. 1 and its vicinity, and FIG. 3 is a plan view of the entry blocking member of FIG. The copy tray 21 is detachably attached, and when the thick sheet document 15 is copied, the copy tray 21 is removed from the main body of the apparatus (shown by a broken line in FIG. 2). The entrance blocking member 26 is rotatably supported by the shaft 27 at the transfer paper discharge port D. As shown in FIG. 3, the entry blocking member 26 is formed in a substantially V shape, and has two arms 26a and 26b and a claw 26c.
And a concave curved surface 26d between the arms 26a and 26b.
Are formed.

When the copy tray 21 is attached to the main body of the apparatus, the end of the copy tray 21 pushes the claw 26c.
The arm 26 a of the entry blocking member 26 is parallel to the copy tray 21 so that the transfer paper 17 can be placed in the copy tray 21. When the copy tray 21 is removed from the apparatus main body, the arm 26b of the entrance blocking member 26 is lowered by its own weight, and the tip of the arm 26b comes to the transfer paper discharge port D. In order to accurately position the tip of the arm 26b, a protrusion (not shown) with which the claw 26c abuts is provided.

When copying a thick sheet document 15,
The copy tray 21 is removed from the apparatus main body, and the sheet original 15 is inserted from the second original insertion portion B to perform copying. The sheet original 15 has a front conveyance roller 11 and a rear conveyance roller 12.
Thus, the document is discharged from the document discharge port C through the exposure section. The transfer paper 17 is transferred to the transfer paper discharge port D by the discharge rollers 19 and 20.
The transfer-preventing member 26 is discharged to the transfer paper discharge port D.
Since the concave curved surface 26d of the
Bends between the concave curved surface 26d and the guide plate 28 along the concave curved surface 26d, and after passing the guide plate 28, the transfer paper 17 sags and falls due to its own weight and falls below the stacker 25 (see FIG. 1).
See). The entry blocking member 26 is provided below the exposure scanning surface so as not to interfere with the document insertion and at the same time prevent the sheet document 15 from floating.

FIG. 4 is a cross-sectional view of the transfer sheet discharge port and its vicinity of the copying machine according to the second embodiment of the present invention, FIG. 5 is a perspective view of an example of the copy tray of FIG. 4, and FIG. 6 is A of FIG. FIG. 6 is a sectional view taken along the line AA. The copy tray 31 is rotatably attached to the main body of the apparatus by a rotation shaft 32, and an entry blocking member 33 is attached to the shaft 3.
5 is rotatably supported. The entry blocking member 33 is shown in FIG.
As shown in FIG.
It has a and 33b, and the concave curved surface 33c is formed between the arms 33a and 33b.

When copying a thin sheet document 14,
Since the original is inserted from the first original insertion portion A, the copy tray 31 is stood upright with respect to the apparatus main body. At that time, the arm 33b of the entrance blocking member 33 is moved to the copy tray 3
It is provided in a position that is parallel to 1 and does not protrude from the copy stack surface so that the transfer paper 17 does not get in the way of entering the copy tray 31. The claw 3 with which the arm 33b abuts in order to accurately position the arm 33b
4 is provided.

When copying a thick sheet document 15,
The copy tray 31 is rotated so that the copy tray 31 is flush with the second original insertion portion B and the exposure scanning surface, and the copy tray 31 is used as an original insertion table. This makes it extremely easy to insert a document in the second document insertion section B. The sheet document 15 is discharged from the document discharge port C through the exposure section by the front transport roller 11 and the rear transport roller 12. The transfer paper 17 is ejected to the transfer paper ejection port D by the paper ejection rollers 19 and 20, but the concave curved surface 33c of the entry blocking member 33 waits at the transfer paper ejection port D with its mouth open. The transfer sheet 17 bends between the concave curved surface 33c and the guide plate 28 along the concave curved surface 33c, and when passing the guide plate 28, the transfer sheet 17 sags and falls due to its own weight and enters the lower stacker 25 (see FIG. 1).

As in the second embodiment, the copy tray 31
By rotatably attaching to the main body of the apparatus, the work of attaching and detaching the copy tray 31 can be omitted, and the copy tray can be used as a document insertion table, so that the operability is further improved.

[0025]

As described above, according to the present invention, the exposure scanning surface and the straight conveying portion of the copying apparatus are inclined downward toward the downstream side of the exposure scanning, and the copy tray is detachably attached to the apparatus main body. Since the structure or the structure in which the copy tray is rotatably attached is adopted, copying can be performed regardless of whether the original is thick or thin, and it is easy to insert a thick original from the front, improving operability and installing the machine. Space can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the transfer sheet discharge port of FIG. 1 and its vicinity.

FIG. 3 is a plan view of an example of the entry blocking member of FIG. 2.

FIG. 4 is a cross-sectional view of a transfer sheet discharge port and its vicinity in a copying machine according to a second exemplary embodiment of the present invention.

5 is a perspective view of an example of the copy tray of FIG.

6 is a cross-sectional view taken along the line AA ′ of FIG.

[Explanation of symbols]

 1 Photoreceptor Drum 2 Contact Glass 3 Lamp 4 Optical System 5 Charging Charger 6 Developing Device 7 Transfer Charger 8 Separation Charger 9 Cleaning Device 10 Charge Eliminating Device 14 Sheet Document 21 Copy Tray 25 Stacker 26 Entry Block Member A 1st Document Insertion Section B 1st 2 Original insertion section C Original ejection port D Transfer paper ejection port E Manual paper feed unit F Automatic paper feed unit

Claims (5)

[Claims] 1. A copying apparatus comprising: an exposure section having an exposure scanning surface for exposing and scanning an original image; and a light source; and an original conveying means for exposing and scanning a sheet original on the exposure section. The copying apparatus is characterized in that it is inclined downward toward the downstream side of. 2. An exposure unit having an exposure scanning surface for exposing and scanning a document image and a light source, a document conveying unit for exposing and scanning a sheet document on the exposure unit, and a document insertion unit for supplying the sheet document to the exposure unit. In a copying apparatus provided with a discharge section provided with a discharge port for a transfer sheet after copying is provided behind the document inserting section and a copy tray for accumulating the discharged transfer sheet, the copy tray is detachable. A copying machine provided with a stacker that is attached to the tray and that receives the transfer paper when the copy tray is removed, and an entry blocking member that prevents the transfer paper from entering the document insertion portion. 3. The entrance preventing member is provided between the document insertion portion and the discharge port and below the exposure scanning surface, and guides the transfer paper from the discharge port toward the stacker. 3. The copying apparatus according to claim 2, which has a concave curved surface. 4. An exposure unit having an exposure scanning surface for exposing and scanning a document image and a light source, a document conveying unit for exposing and scanning a sheet document on the exposure unit, and a document insertion unit for supplying the sheet document to the exposure unit. In a copying apparatus provided with a discharge section having a discharge port for the transfer sheet after copying is provided behind the document insertion section and a copy tray for accumulating the discharged transfer sheet, the copy tray is a rotary shaft. And the rotation axis is provided below the exposure scanning surface so that the copy tray is rotated to form a document insertion table when a sheet document is supplied from the document insertion section. A copying apparatus comprising: a stacker that receives the transfer sheet when used on an insertion table, and an entry blocking member that prevents the transfer sheet from entering the document insertion section. 5. The original insertion table has a concave curved surface for guiding the transfer paper, the rotatably supporting member is rotatably supported in the vicinity of a rotation shaft and below the exposure scanning surface. 5. The copying apparatus according to claim 4, wherein when used as a sheet, the entrance blocking member is rotated by its own weight to direct the concave curved surface in a direction in which the transfer sheet is advanced from the discharge port to the stacker.