JPS63231329A - Original feeder - Google Patents

Abstract

PURPOSE:To improve the efficiency of a copying operation by providing a paper discharge device which inverts and guides an original from contact glass, and guides the same to a paper discharge tray, a driving device which drives a reversible roller and a control device for changing over a change-over pawl. CONSTITUTION:A paper feed path 16 which guides the original from an original table 11 to an intermediate position and a paper feed path 17 from the intermediate position up to the contact glass are provided on a conveyor 13. An inversion path 18 and the change-over pawl 19 connected to the feed paths 16, 17 are provided on the intermediate position. A conveyance roller 20 is provided on the path 16 and the reversible roller 21 is provided on the path 18. A conveyor belt 22 is provided on the glass 2. The paper discharge device 14 is provided with the inversion path 27 and paper discharge path 26 for inverting and guiding the original from the glass 12 to the discharge tray 44 upper than the glass. The roller 21 is reversibly driven and the change over of the change-over pawl 19 is controlled in such a manner, by which the inversion and guiding of the original from the path 16 to the path 17 are permitted. Provision of a paper feed table and discharge table in proximity to each other is also possible.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document feeding device, and more particularly to a document feeding device such as a copying machine or a copying machine.

BACKGROUND OF THE INVENTION Document feeding devices for automatically or semi-automatically feeding documents are known in conventional copying machines and the like.

Conventional document feeding devices such as copying machines use a back-side setting method in which the original is placed on a document table with the image side to be copied facing down, and the original is ejected with the image side facing up. It is composed of

Such conventional copying machines often have the problem of making unnecessary copies due to mistakes in setting the original, and also, when copying the ejected original, the original must be turned over and set, which is a cumbersome process. There was a problem that work efficiency decreased.

A copying machine, or a copying machine, for creating a certified copy such as a one-way transcript is configured so that the front side of the original, that is, the image side, faces up on the original table, and the original is ejected with the back side facing up. It has been known.

In most cases, the number of copies made by a copying machine is 2 to 5.
It is said to account for approximately 80% of the total.

When making a large number of copies in this way, it is necessary to turn over the original that has been ejected from the back side and insert it into the original table again with the front side facing up, which is cumbersome and reduces work efficiency significantly. .

The present invention solves the above-mentioned conventional problems, and aims to provide a document feeder that sets the original with the image side to be copied facing upward, and discharges the original with the image side facing upward after copying. .

(2) Bottom In order to achieve the above object, the present invention provides a first paper feed path from the original table to an intermediate position, a second paper feed path from the intermediate position to the contact glass, and the first paper feed path at the intermediate position. a reversing path connected to the paper path and the second feeding path;
A conveyor comprising a switching claw disposed at the intermediate position, a conveyance roller disposed on the first paper feeding path, a reversible roller disposed on the reversing path, and a conveyance belt disposed on the contact glass. a paper ejecting device having a reversing paper ejection path that inverts and guides a document from the contact glass and guides the document to a paper ejection tray above the document contact glass; a drive device that reversibly drives the reversible roller; and the switching device. The invention is characterized in that it has a control device that controls switching of the pawls.

The structure and operation of the present invention will be explained in detail based on the embodiment shown in the drawings.

FIG. 1 is an external view of a copying machine using a copying machine equipped with a document feeding device according to the present invention.

In Figure 1, the certified copy production system is roughly divided into two types, for example:
, a large-capacity paper feed tray 1 that can accommodate 500 sheets, a copying machine main body 2, a document feeder t3, a relay unit 4, a bookbinding a5, and an operator's chair 6. Among them, large capacity paper feed tray 1
The equipment for and chair 6 can be arbitrarily selected regardless of the transcription system.

In the second system, the copy 4112 operation is indicated by the arrow 6 in the figure.
It can be done from two directions indicated by and 7.
In the illustrated example, the operation in the direction of arrow 7 can be performed while sitting on chair 6.

On the operation surface from this direction, a special operation panel 8 necessary for making a certified copy is provided so as to be convenient for making a certified copy, and the copying machine operation part necessary for making a certified copy can also be operated while sitting on a chair. An auxiliary keyboard I is detachably attached to the operating section 9 of the copying machine main body 2 via a cord so that the necessary keys
It is provided at O.

Most of the certified manuscripts are in the "Mino" size, which is about 10 nm larger than the B4 size in both the length and width, making the machine close to a standard size machine.

In FIG. 2, the document feeding device 3 includes a document table 11, a conveying device 13 that conveys the document set on the document table 11 to a predetermined exposure position above the contact glass 12 of the copying machine main body 2, and It has a paper ejecting device 14 that ejects the exposed original document. When the document feeder 3 is considered for use in a copying machine, the document is fed manually and the document is automatically fed using an anti-automatic feeder t (SADF (semi, auto).
o*atic document feeder)), but it can also be applied to a fully automatic document feeder (ADF).

The original is set on the original table 11 with the image side to be copied facing upward (referred to as front side setting). The original set face-up is sent out by the brush roller 15.

The transport device 13 includes a first paper feed path 16 extending from the document table 11 to the intermediate position A, a second paper feed path 17 extending from the intermediate position iZA to the contact glass 12, and a second paper feed path 17 extending from the intermediate position IZA to the intermediate position A.
In the example shown in FIG. Road 1
8 is formed on the first paper feed path 16 so as to invert and guide the document substantially parallel to it. However, the present invention is not limited to this structure, and any structure may be used as long as the document can be guided from the first paper feed path 16 to the second paper feed path 17 while being reversed.

A switching claw 19 is provided at the intermediate position A, and a path from the first sheet feeding path 16 to the reversing path 18 and from the reversing path 18 to the second sheet feeding path 17 are provided.
The structure is such that it is possible to switch the passage to. In the position shown in the figure, the paper can be transported from the reversing path 18 to the second feeding path 17, but
Conveyance from the first paper feed path 16 to the reversing path 18 is not possible.

The first paper feed path 16 includes a conveyance roller 20 that feeds the document.
is placed. In the illustrated example, a conveyance roller is not arranged on the second paper feed roller, but it may be arranged depending on the length of the conveyance path.

A reversible paper feed roller 21 is arranged in the reversing path 18 .

The transport device includes a transport conveyor 22 for transporting and fixing a document fed from the document table 11 through the first paper feed path 16, the reversing path 18, and the second paper feed path 17 to a predetermined exposure position. It is provided as part of 13. *The feed conveyor 22 is wrapped around supporting rollers 23, 24 arranged above the contact glass 12 and is pressed against the contact glass 12 by a breath roller 25.

The paper ejecting device 14 has a paper ejecting path 26 for reversing and guiding the document sent out from the contact glass 12.

The paper discharge path 26 has a curved reversing portion 27 and a discharge path 28 that guides above the contact glass 12 substantially parallel to the contact glass 12 to the paper discharge port 2.

A direct paper ejection path 47 in which the original from the contact glass 12 is ejected by the rollers 29 straight to the path to the reversing unit 27.
It is also possible to use a switching claw 30 to switch between the two.

Further, a turn roller 31 is arranged at the transition portion from the reversing section 27 to the discharge path 28, and a switching claw is provided as necessary to switch between the path to the discharge path 28 and the path returning along the circumference of the turn roller 31. It can also be made possible. Turn roller 31
By returning the original along the return guide plate 32 to the exit side of the contact glass 12, it becomes possible to copy the front and back sides of the original in succession.

A reversing drive roller 33 is disposed in the reversing section 27, and the reversing drive roller 33 can also be used as a driving roller for the document sent along the return guide plate 32.

In the reversing portion 27, a guide plate 34 is branched from a position slightly before the reversing drive roller 33 to the feed roller 29, and a switching pawl 35 can be provided at the branching position.

The operation of this device will be explained.

When the original start key is pressed, the brush roller (original transport roller) 15 rotates clockwise in the figure and waits for insertion of the original.

At this time, the feed roller pair 3, which is provided behind the brush roller 15, is separated, and the entrance gate pawl 39 is raised to stop the paper.

When a front-side original is inserted from the original table 11, it is conveyed by the brush roller 15, passes between a pair of rollers 36, and stops when its leading edge hits the entrance gate pawl 37. The document is detected by a plurality of paper feed set sensors 38 arranged just before it hits the entrance gate pawl 37 .

When the document is detected by, for example, two paper feed set sensors 38 arranged horizontally with respect to the feeding direction, and it is confirmed that the document is not skewed, the brush roller 15 stops after a predetermined period of time, and then the input logate claw 37 is lowered, and at the same time, the feed roller pair 36 comes into contact. The feed roller pair 36 is configured to interlock with the entrance gate pawl 37. After that, the feed roller pair 36, the conveyance roller 20, and the paper feed roller 2
1 is rotationally driven and the document passes through the first paper feed path 16 and is sent to the reversing path 18.At this time, when the trailing edge of the document passes the paper feed set sensor 38, the entrance gate pawl 37 rises and the document is sent to the feed roller pair. When the trailing edge of the original document passes through the reversing sheet feeding sensor 39, the conveying roller 20 and the sheet feeding roller 21 are stopped. Also, the switching claw 19 is switched.

After a predetermined period of time after the trailing edge of the document passes through the reversal sheet feeding sensor 39, the sheet feeding roller 21 is driven in the reverse direction, and the document is sent from the reversing path 18 to the second sheet feeding path 17. The conveyance roller 20 can also be structured to work in conjunction with the paper feed roller 21.

The leading edge of the document advances to a registration sensor 40 provided in the second paper feed path 17, the sensor 40 turns on, and the paper feed roller 21 stops after a certain period of time. Thereafter, signals are exchanged between the document feeder and the copying machine body, and after a predetermined time, the paper feed roller 21 and conveyance belt 22 are driven, and the document is conveyed to a predetermined position above the contact glass 12 and then stopped. .

Thereafter, after exposure, the original passes from the reversing path 27 to the ejecting path 28 and is ejected from the ejecting port 28 by the action of the conveying belt 22, the feeding roller 41, the reversing drive roller 33, the intermediate roller 42 of the ejecting roller 28, and the paper ejecting roller 43. The paper is discharged onto the paper tray 44. The ejection of the document is detected by the ejection sensor 46.

Repeat the above steps.

If necessary, if it is desired to directly feed the paper from above the contact glass 12 to the next device, the feed claw 30 can be switched so that the paper passes directly through the paper discharge path 47 and is fed by the feed rollers 29.

Also, if you want to copy the front and back sides of the same original in succession, use reversing path 2.
The original document 7 can be guided back along the outer periphery of the turn roller 31 to the guide plate 32 and sent onto the contact glass 12 again from the exit end.

In addition, when it is desired to reverse the original after exposure has been completed on the contact glass 12 and send it to the next device, the original is first sent through the reversing path 27, and the trailing edge of the original is detected by the reversing paper ejection sensor 45, after which a certain period of time has elapsed. It is also possible to stop the reversing drive roller 33 and drive it in the reverse direction so that the document is sent back to the feed roller 29 through the guide plate 34.

At that time, the switching claw 35 is switched.

In FIG. 2, members related to the conveyor 22, the reversing path 27, the reversing drive roller 33, and the turn roller 31 are assembled into one frame as a unit to constitute a conveying section, and the discharging path 28 and intermediate The rollers 42 and the members related to the paper discharge rollers 43 are assembled into separate frames.
The paper ejection section is formed as one unit. As a result, the document feeder of the present invention has three parts: a paper feed section, a conveyance section, and a paper discharge section.
It is composed of two units.

In accordance with the present invention, since the original is inserted on the front side (with the image facing upward), errors in the insertion direction and page order are obvious at a glance, eliminating copy mistakes and improving work efficiency.

When making two or more copies, the original is ejected on the front side, so you can just move the original from the paper output tray onto the original table and insert it, which increases work efficiency as there is no need to turn the original over. do.

In the document feeder according to the present invention, the paper feeding section, that is, the paper feeding table, and the paper discharging section, that is, the paper discharging tray are close to each other, so that the work efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of an example of a copying apparatus to which the present invention is applied, and FIG. 2 is a longitudinal sectional view of a document feeder.

Claims (1)

[Claims] In a document feeder such as a copying machine, which includes a document table, a conveyance device that conveys the document on the document table to a copy exposure position, and a paper discharge device that discharges the document at the copy exposure position, the conveyance device is connected to the document table. 1st to a more intermediate position
a paper feed path, and a second path from the intermediate position to the contact glass.
The first paper feed path and the second paper feed path at the intermediate position between the paper feed path and the intermediate position.
a reversing path connected to the paper feed path, a switching claw disposed at the intermediate position, and a conveyance roller disposed in the first paper feed path;
It has a reversible roller disposed on the reversing path and a conveyance belt disposed on the contact glass, and the paper ejecting device inverts and guides the original from the contact glass to a paper ejection tray above the original contact glass. What is claimed is: 1. A document feeding device comprising: a reversing discharge path for guiding the reversible sheet to a document feeder, a drive device for reversibly driving the reversible roller, and a control device for switching and controlling the switching pawl.