JPH11171383A - Paper discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper discharging device capable of preventing an image forming device from being damaged caused by forcible drawing of a paper sheet, by a simple structure. SOLUTION: A paper discharging device is provided with a casing 2 for covering a paper discharging port 101o of a copying machine 100, a paper sheet conveying passage 3 so provided as to face the paper sheet discharging port 101o of the copying machine 100, and an upper paper discharging roller 4 and a lower paper discharging roller 5 provided between the paper discharging port 2o of the casing 2 and the paper conveying passage 3, and a cutout 5h to be communicated with the paper sheet conveying passage 3 in the waiting state in which the upper paper discharging roller 4 and the lower paper discharging roller 5 are stopped is provided on the lower paper discharging roller 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper discharge device mounted on a book image forming apparatus to prevent a sheet from being pulled out from a paper discharge port of the book image forming apparatus.

[0002]

2. Description of the Related Art When a book image forming apparatus such as a copying machine is installed in a store or a public facility, a paper sheet being discharged from the paper discharge port of the apparatus may be lost due to inexperience of a user. It is sometimes forcibly pulled out by the user. When a sheet in the middle of paper ejection is forcibly pulled out, not only does the image quality on the sheet significantly deteriorate, but also the apparatus may be damaged due to excessive force and may cause malfunction. Was. To solve such a problem, a copying machine (document image forming apparatus) A as shown in FIG.
A casing B is attached to the cover B to cover the paper discharge port Ao of the copying machine A, and the paper sheet P discharged from the paper discharge port Ao and freely dropped is taken out from an outlet Bo provided below the casing B. However, the usability was poor due to the low position of the outlet Bo. Therefore, as shown in FIG. 9B, a pair of paper discharge rollers Cr and Cr are disposed inside a casing Ca that covers the paper discharge port Ao of the copying machine A, and
The paper P discharged from the printer is conveyed in the horizontal direction by the paper discharge rollers Cr, Cr. The paper discharge device C configured to discharge the paper is provided.

[0003]

FIG. 9 (b)
In the paper discharging device C shown in FIG. 2, the paper discharging rollers Cr, Cr are synchronized with the paper discharging rollers Ar, Ar of the copying machine A, and the paper is discharged from the paper discharging roller Ar for the purpose of suppressing the size in the paper sheet conveying direction. ,
Ar and paper discharge rollers Cr, a configuration for transporting by Cr,
Alternatively, the paper discharge rollers Cr, Cr can be opened and closed freely, and the paper discharged from the copying machine A is introduced between the opened paper discharge rollers Cr, Cr, and then the paper discharge rollers Cr, Cr are closed to convey the paper. It is configured as follows. Paper discharge device C having the above configuration
According to the present invention, although the paper sheet P can be easily taken out from the paper discharge port Co and space can be saved, the paper discharge rollers Cr, C
In the configuration in which r is synchronized with the paper discharge rollers Ar of the copier A, the configuration of the mechanical or electrical synchronization means becomes complicated, and in the configuration in which the paper discharge rollers Cr and Cr are opened and closed, the paper discharge rollers There is an inconvenience that the Cr support mechanism and the opening / closing mechanism become complicated. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a paper ejection device capable of preventing damage to an image forming apparatus due to forcible pulling out of a sheet with a simple structure. is there.

[0004]

In order to achieve the above object, a paper discharge device according to the present invention includes a casing mounted on a document image forming apparatus so as to cover a paper discharge port of the document image forming apparatus, A sheet conveying path provided in the casing facing the sheet discharging port of the book image forming apparatus, and a pair of sheet discharging rollers provided between the sheet discharging port of the casing and the sheet conveying path; At least one of the pair of paper discharge rollers is provided with a notch communicating with the transport area of the paper sheet transport path in a standby state in which the pair of paper discharge rollers is stopped.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment. 1 to 8 show an example in which the present invention is applied to a paper discharge device mounted on a copying machine (document image forming apparatus).

As shown in FIGS. 1 and 2, a copying machine 100 as an image forming apparatus includes a casing 101 having a paper discharge port 101o, and a pair of paper discharge rollers 102, 102 housed in the casing 101. I have it.

On the other hand, the paper discharging apparatus 1 according to the present invention includes a casing 2 mounted on a side of the copying machine 100 so as to cover a paper discharge port 101o of the copying machine 100. Is formed with a paper discharge port 2o, and a tray 1t for accommodating the paper sheet discharged from the paper discharge port 2o is attached.

[0008] Further, a copying machine 1 is provided inside the casing 2.
A sheet conveying path 3 facing the sheet discharge port 101o is provided. The sheet conveying path 3 includes an upper guide plate 3u and a lower guide plate 31 extending in the horizontal direction. A sensor S for detecting passage is attached.

Further, inside the casing 2, a pair of upper discharge rollers 4 and lower discharge rollers 5 that abut against each other are disposed between the discharge port 2 o of the casing 2 and the sheet transport path 3.
And a notch 5 h is formed in a part of the peripheral surface of the lower discharge roller 5.

As shown in FIGS. 3 to 5, the notch 5h extends along the axial direction of the lower discharge roller 5, extends over a wider range than the width of the sheet P to be conveyed, and extends downward. It is formed in such a manner that both left and right ends of the side discharge roller 5 are left.

The notch 5h communicates with the transport area of the sheet transport path 3 as shown in FIG. 1 in a standby state in which the upper discharge roller 4 and the lower discharge roller 5 are stopped. For example, it is located so as to face the space between the upper guide plate 3u and the lower guide plate 31.

As shown in FIG. 4, the upper discharge roller 4 and the lower discharge roller 5 are supported by side plates 2s and 2s provided in the casing 2, and in particular, the upper discharge roller 4 is vertically moved. Is also movably supported, and the side plate 2s and the support shaft 4S are supported.
Are pressed against the lower discharge roller 5 by the urging force of the tension spring G stretched between them.

A drive motor M is linked to an end of the support shaft 5S of the lower discharge roller 5 via a driven pulley 6a, a conduction belt 6b and a drive pulley 6c. As a result, the lower discharge roller 5 rotates in the direction of arrow r5 in FIG. 1, and the upper discharge roller 4 that is in pressure contact with the lower discharge roller 5 rotates in the direction of arrow r4 in FIG. Become.

Now, in a standby state waiting for the paper sheet P to be discharged from the copying machine 100, both the upper discharge roller 4 and the lower discharge roller 5 are stopped, and especially the lower discharge roller 4 is stopped. As shown in FIG. 1, the paper discharge roller 5 is stopped with the notch 5 h facing upward and facing the upper paper discharge roller 4.

In this state, the space defined by the outer peripheral surface of the upper paper discharge roller 4 and the notch 5h of the lower paper discharge roller 5 forms the transport area of the paper transport path 3, that is, the upper guide plate 3u. It faces the space between the lower guide plate 31 and the discharge port 2o of the casing 2 at the same time.

The copying machine 100 starts operating, and the discharge port 10
When the sheet P on which the written image is formed is discharged from 1o, the sheet P is transferred to the sheet transport path 3 of the sheet discharging device 1 as shown in FIG.
And moves between the upper guide plate 3u and the lower guide plate 31 toward the right side in the figure by the conveyance force of the paper discharge rollers 102 of the copier 100. At this point, both the upper discharge roller 4 and the lower discharge roller 5 are in a standby state in which both are stopped.

When the sheet P further advances, the leading end of the sheet P passes through the sheet conveying path 3 and then enters the notch 5h of the lower sheet discharging roller 5 as shown in FIG. When the trailing end of the leaf P is sent out from the paper discharge rollers 102 of the copying machine 100, the advance of the leaf P is stopped.

Here, as is apparent from the figure, the lower guide plate 31 of the sheet transport path 3 is formed flush with the bottom surface of the notch 5h of the lower discharge roller 5,
The sheet P smoothly enters the notch 5h of the lower sheet discharging roller 5 from the sheet conveying path 3.

After the paper sheet P stops in the state shown in FIG.
When a predetermined time has passed since the sensor S detected the sheet P traveling in the sheet transport path 3 first, the drive motor M
Is started, and as shown in FIG. 8, the upper sheet discharging roller 4 and the lower sheet discharging roller 5 rotate in the direction of the arrow, so that the sheet P becomes the outer peripheral surface of the upper sheet discharging roller 4 and the lower sheet discharging roller. 5, and is discharged from the discharge port 2 o of the casing 2 to the outside.

Here, the sheet P discharged from the discharge port 2o of the casing 2 is completely discharged from the copying machine 100 and is completely separated from the discharge rollers 102, 102. 2, the image quality on the paper sheet P is not affected at all, and even if the paper sheet P being discharged from the paper output port 2o is forcibly pulled out by the user. There is no damage to the mechanism.

Note that the paper sheet P is used as the paper discharge port 2o of the casing 2.
When the drive motor M stops operating after the paper is completely discharged from the upper paper discharge roller 4 and the lower paper discharge roller 5, the notch 5h of the lower paper discharge roller 5 is turned upward to stand by. It stops in the state and waits for the next conveyance of the paper sheet.

The above-described paper discharge device 1 operates the upper paper discharge roller 4 and the lower paper discharge roller 5 based on the detection result of the sensor S provided in the paper sheet transport path 3, and performs copying. The discharge rollers 4 and 5 are not operated in synchronization with the apparatus 100.

For this reason, there is no need to provide any synchronizing means between the paper discharging device 1 and the copying machine 100, so that the paper discharging roller is compared with the conventional paper discharging device in which the paper discharging roller is synchronized with the copying machine. However, the configuration of the above-described paper discharge device 1 is extremely simple.

Further, in the paper discharging apparatus 1 having the above-described configuration, the upper paper discharging roller 4 and the lower paper discharging roller 5 which are in pressure contact with each other.
The notch 5h is provided in one of the lower discharge rollers 5 so that the upper discharge roller 4 and the lower discharge roller 5 can be opened and closed without being opened and closed. , And transport of the paper sheet by the discharge rollers 4 and 5 is enabled.

For this reason, the paper ejection roller 4 is
There is no need to provide the opening / closing mechanism 5 at all, and the configuration of the above-described paper discharging device 1 is extremely simple as compared with the conventional paper discharging device in which the paper discharging roller is opened and closed.

In the above-described embodiment, the notch is provided only on the lower discharge roller of the upper discharge roller and the lower discharge roller, but the notch is provided only on the upper discharge roller. Such a configuration is also possible.

It is also possible to form notches in both the upper discharge roller and the lower discharge roller. In this case, the notch in the upper discharge roller and the cut in the lower discharge roller may be formed. It goes without saying that the notches face each other in the standby state, thereby defining a space for the paper sheet to enter.

Further, the paper discharge device according to the present invention is not only a paper discharge device mounted on the copying machine shown in the embodiment, but also a paper discharge device mounted on various document image forming devices such as a facsimile device. Can be effectively applied.

[0029]

As described in detail above, the paper discharge device according to the present invention comprises a casing mounted on a document image forming apparatus so as to cover a paper discharge port of the document image forming apparatus, and a casing provided inside the casing. A sheet conveying path provided facing the sheet discharging port of the book image forming apparatus, and a pair of sheet discharging rollers provided between the sheet discharging port of the casing and the sheet conveying path; At least one of the rollers is provided with a notch that communicates with the transport area of the sheet transport path in a standby state in which the pair of paper discharge rollers is stopped. According to the above configuration, at least one of the pair of paper discharge rollers is provided with a notch,
The paper sheet can enter between the pair of paper discharge rollers without opening and closing the pair of paper discharge rollers, and can be conveyed by the pair of paper discharge rollers. For this reason, there is no need to provide any mechanism for opening and closing the pair of paper discharge rollers. It will be simple. Therefore, according to the paper discharge device according to the present invention, it is possible to prevent damage to the image forming apparatus caused by forcibly pulling out a sheet with a simple structure.

[Brief description of the drawings]

FIG. 1 is a fragmentary side view showing a main part of a paper discharge device according to the present invention.

FIG. 2 is a conceptual diagram showing a state in which a paper ejection device according to the present invention is mounted on a book image forming apparatus.

FIG. 3 is a perspective view showing a paper discharge roller of the paper discharge device according to the present invention.

FIG. 4 is a front view showing a paper discharge roller and a driving mechanism of the paper discharge device according to the present invention.

5A and 5B are a sectional view taken along line aa and a sectional view taken along line bb in FIG. 4;

FIG. 6 is a cross-sectional view of a main part showing an operation mode of the paper discharge device according to the present invention.

FIG. 7 is a cross-sectional view of a main part showing an operation mode of the paper discharge device according to the present invention.

FIG. 8 is a cross-sectional view of a main part showing an operation mode of the paper discharge device according to the present invention.

FIGS. 9A and 9B are conceptual diagrams showing a conventional sheet discharging device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Paper discharge device, 2 ... Casing, 2o ... Paper discharge port, 3 ... Paper sheet conveyance path, 4 ... Upper discharge roller, 5 ... Lower discharge roller, 5h ... Notch, 100 ... Copy machine (document image Forming device), 101: casing, 101o: paper discharge port.

Claims (1)

[Claims] A casing mounted on the book image forming apparatus so as to cover a paper discharge port of the book image forming apparatus; and a paper sheet provided inside the casing facing the paper discharge port of the book image forming apparatus. A sheet discharging device comprising: a conveying path; and a pair of sheet discharging rollers provided between a sheet discharging port of the casing and the sheet conveying path, wherein at least one of the pair of sheet discharging rollers And a notch communicating with a conveyance area of the paper sheet conveyance path in a standby state in which the pair of paper ejection rollers are stopped.