JPS63189330A - Original transfer device - Google Patents

Abstract

PURPOSE:To simplify a transfer belt and make the whole device small-sized by forming the portion of an original delivery transfer path from an original reversing means to an original mount bed nearly vertically to the original mount bed. CONSTITUTION:The vertical transfer section 9 of an original delivery transfer path 12 is formed nearly vertically to a platen 2, but the transfer direction of an original 11 passing the vertical transfer section 9 is changed to the direction nearly vertical to a platen 2. Therefore, the original 11 is smoothly transferred along the inner wall of the vertical transfer section 9 without being bent. The original 11 is transferred to the original insertion side of the platen 2 and transferred to the predetermined position of the platen 2 by an endless transfer belt 15, then an image forming equipment arranged in the copying machine main body 1 is operated for copying. When copying is completed, the endless transfer belt 15 is rotated, and the copied original 11 passes an original discharge path 16 and is transferred to an original receiving tray 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a document conveying device that conveys documents stacked and stored in a document tray to a document tray multiple times by reversing the documents from front to back. The present invention relates to an improvement of a document conveying device that can reduce the overall size.

[Prior Art] Conventionally, as this type of document conveyance device, one shown in FIG. 6 is known.

In other words, this document conveying device includes a document tray (d) that is disposed on the top side of the copying machine main body (a), and is disposed on the document insertion side of the platen (b) to stack and accommodate documents (C); (C) from the document tray (d) one by one, and a conveyor belt (f) that conveys the document (C) sent out in the direction of the arrow along the surface of the platen (b).
, an original ejection path (h) that transports the copied original (C) from the platen (b) to the original trays 1 to rays (i), and a single-sided copying device provided between the original ejection path (h) and the original tray (d). A feedback conveyance path (j) that feeds back the finished original (C) to the original insertion side of the platen (b), and a feedback conveyance path (j) that is provided in the feedback conveyance path (j) and reverses the conveyance direction of the original (C) to be fed back. The document reversing means (k) changes the front and back sides of the document.

Note that (m) and (n) in FIG. 6 indicate branch guides.

To make a single-sided copy of original 1 (C) using this device, first operate the operation button not shown to set the device to single-sided copy mode, and then displace the branch guide (m) to the position shown by the chain line. By operating the start button,
A document (C) is sent out from the document tray (d) and placed on the surface of the platen (b) by a conveyor belt (f). Next, image forming devices (not shown) such as a photosensitive drum, an optical system, and a developer disposed inside the copying machine main body (a) are operated to make a copy, and then the copied original (C) is transferred to the original ejection path ( h
), the original document tray is discharged onto the tray (0).

On the other hand, to make a double-sided copy, set the device to the double-sided copy mode, move the branch guide (m) to the position shown by the solid line, and then operate the start button to start the image forming device in the same way as for the single-sided copy above. Then, one side of the original (C) is copied, and then this one-sided copied original (C) passes through the feedback conveyance path (j) and is transferred to the original reversing means (
k) side. Then, the conveyance direction of the original vA<c> is reversed by the document reversing means (k), the front and back sides are reversed, and the original vA<c> is conveyed again to the document insertion side of the platen (b), and the back side is copied and the document receiver is placed in the tray. (q).

By the way, since this document conveying device is equipped with a document tray (d) on the document insertion side of the platen (b), the document tray (d) protrudes outward from one end of the copying machine body (a). However, it also had the disadvantage that the device was too large to be incorporated into a small-sized copying machine. On the other hand, in order to eliminate this drawback, the above document tray (d)
It is also conceivable to place the document tray above the tray (()>, but in this way, the document tray (d) can be moved from the document tray (d) to the document insertion side of the platen (b). A separate path is required, and the conveying path needs to be set longer to avoid interference with the original reversing means (k), which results in a disadvantage that the apparatus becomes complicated and larger.

Therefore, a document conveying device shown in FIG. 7 has been developed in place of the device provided with the document reversing means (k). That is, in this device, the document tray (d) is arranged above the tray (q), and the document tray (d) is arranged between the document tray (d) and the document insertion side of the platen (b). ) to the platen (b) side;
), the document ejection side of the platen (1)), and the document tray are arranged between the tray (0) and carry the copied document (C). The document receiver is disposed between the document ejection path (h) that discharges the document to the tray (g), the document insertion side of the platen (b), and the document tray (d), and sends out and transports the single-sided copied document (C). Road (
Feedback conveyance path (j) that feeds back to p)
In the single-sided copy mode, the original (C) is transported from the original tray (d) through the original delivery path (p) to the platen (b) side, and the copy is completed. After that, the copied original (C) is ejected to the tray (0) via the original ejection path (h), and on the other hand, in the double-sided copy mode, the single-sided copied original (C) is transferred to the conveyor belt (f). Reverse the feedback conveyance path (j)
feed back to the document feed conveyance path (p) via
The paper is conveyed again to the platen (b) side and the back side thereof is copied.

[Problems to be Solved by the Invention] However, in this document conveying device, the document (C) sent out in a substantially horizontal direction from the document tray (d) is moved along the document sending out conveyance path (p). The document feed direction is changed to the opposite direction and the document is transported to the platen (b) surface.
C) needs to be formed into a loose loop shape so that it can be deformed along this document feed-out conveyance path (p), and the document feed-out conveyance path (p) extends outward from one end of the copying machine body (a). Since the conveyor belt (f) needs to be rotated in both forward and reverse directions, there is a problem in that the mechanism thereof is complicated.

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned problems, and its object is to provide a document transport system that has a simple mechanism for the document transport belt and can downsize the entire device. The goal is to provide equipment.

In other words, the present invention provides a document tray, a document sending means for sending out the document stored in the document tray, a document sending path for conveying the document from the document tray to the document table, and a document feed path for conveying the document from the document tray to the document table. A document conveyance belt that conveys documents from the document placement table to the document tray, a document discharge path that conveys documents from the document tray to the document tray, and a document discharge path that is located above the document conveyance belt and is located between the document discharge path and the document feed conveyance path. The document feeder is provided with a feedback conveyance path that communicates with A document reversing means is provided on the upper side for reversing the conveyance direction of the document conveyed from the document tray or the feedback conveyance path and changing the conveyance direction to a direction substantially perpendicular to the document placing table. The apparatus is characterized in that a portion of the path from the document reversing means to the document placement table is formed substantially perpendicular to the document placement table.

Regarding the arrangement position of the document tray in such technical means, it is desirable to provide the document tray above the document tray and closer to the document ejection side, in order to secure the installation space for the document feed-out conveyance path. .

The document reversing means can be constructed of a drive roller that can rotate in forward and reverse directions, as in conventional devices, and a pinch roller that presses against the drive roller, and the document is conveyed from the document tray or feedback conveyance path. The document is once conveyed in a direction away from the document table, and after a predetermined period of time, the direction of rotation of the drive roller is reversed to reverse the conveyance direction.
The conveyance direction is changed to a direction substantially perpendicular to the document mounting table. Regarding the arrangement position of this document reversing means, the document conveyance direction is changed to a direction substantially perpendicular to the document placement table, and the document is sent out and conveyed in such a manner that the document is formed approximately perpendicular to the document placement table. In order to smoothly convey the document along the path to the document placement table, it is necessary to provide it above the document insertion side of the document placement table.

In addition, regarding the above-mentioned document feeding means disposed in the document tray, if the copying machine incorporating this document conveying device is a model that discharges the copy paper with the copy side facing upward, the document to be loaded and stored in the document tray will be It is preferable to use a document feeding means that can easily match the page order with the page order of the copy paper. For example, the document feeding means may be composed of a conveyance paddle that feeds out the documents in order from the top of the document, and a retard pad that prevents double feeding of the documents. can.

[Function] According to the above-mentioned technical means, the document tray is arranged above the document placement table, and the document tray is arranged above the document insertion side of the document placement table in the document sending and conveying path. Alternatively, a document reversing means is provided for reversing the conveyance direction of the document conveyed from the feedback conveyance path and changing the conveyance direction to a direction substantially perpendicular to the document placing table, and also for reversing the conveyance direction of the document conveyed from the document feed conveyance path. Since the part from the reversing means to the document loading table is formed to be approximately perpendicular to the document loading table, the document feeding path can be positioned on the outside of the document conveying device body without impairing document conveyance. It becomes possible to arrange the structure without protruding into the surface.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.A document conveying device according to this embodiment is incorporated into a copying machine, and as shown in FIG. ).

In other words, this document conveying device includes a document tray (3) disposed above the platen (2) of the copying machine main body (1), a document tray (4), and a document feed side of the document tray (3). A document sending means (7) provided at )
It consists of a reversing conveyance section (10) extending upward from the connecting section of the document tray (3) to the platen (2) side.
1), and a driving roller (12) disposed along the length of the platen (2).
3) and a driven roller (14) and rotating in the direction of the arrow, an endless conveyor belt 1 to (15), and the document discharge side of the platen (2) and the document receiver are provided between the tray (3). The document receiver has an original ejection path (16) that transports the copied original 1 (11) to the tray (4), and this original ejection path (16).
6) and the S-shaped transport section (
a feedback conveyance path (17) which is connected between the document feed-out conveyance path (12) and which feeds back the document (11) discharged from the platen (2) into the document feed-out conveyance path (12); A drive roller (18) and a pinch roller (
19) and a document reversing means (20) comprising the main part thereof.

And each of the above-mentioned conveyance paths (12) (16) (17
) includes a drive roller (21) and a driven roller (22), and includes a document transport means (2) for transporting the document (11) along each transport path (12), (16), and (17).
3) to (23) are arranged, and at the intersection of the document ejection path (16) and the feedback conveyance path (17), there is a branch that shifts from the solid line position to the broken line position depending on the copy mode. A guide (24) is provided, and an S-shaped conveyance section (8) of the document feed-out conveyance path (12) is provided.
) and the vertical conveyance section (9), a branch guide (26) is provided which is always urged toward the S-shaped conveyance section (8)=12- by a spring (25).

Furthermore, regarding the drive roller (30) of the document conveyance means (23) provided at the intersection of the document feed-out conveyance path (12) and the feedback conveyance path (11), there is a limit disposed on the front side thereof. The timing of its rotation and stop is appropriately controlled based on the signal from the limit switch (27), and the driving roller (32) and the driven roller are disposed in front of the limit switch (27). roller(
33) is formed by a slip roller.

To perform one-sided copying using the document feeder configured in this way, first place the document (
11) with the copy side facing down and the pages aligned, and then operate the operation button (not shown) provided on the copying machine body (1) to set it to single-sided copy mode, thereby ejecting the original. Branch guide (2) provided on road (16)
4) is displaced to the position shown by the solid line (see Figure 2).

Next, by operating the start button, the above document tray (
The feed paddle (6) arranged in 3) rotates, and the leading edge of the original (11) is brought into contact with the retard pad (5) provided on the bottom side of the original tray (3), while 1 from the side
The original (11) is sent out sheet by sheet into the original delivery conveyance path (12), and this original (11) is conveyed along the S-shaped conveyance section (8) by the original conveyance means (23).

Then, the document (11) is transferred to the reverse conveyance section ( 10) to the document reversing means (20) side, and the rear end side of the document (11) is conveyed along the branch guide (20).
6), this guide (26) is loaded with a spring (
25) closes it toward the S-shaped conveyance section (8), and a sensor (not shown) provided near the branch guide (26) detects passage of the document (11).

Next, based on the detection signal from the sensor, the driving roller (18) of the document reversing means (20) reversely rotates, reversing the conveying direction of the document (11), and changing the conveying direction to the platen (2). (see Figure 3).

At this point, the vertical conveyance section (9) of the document feed-out conveyance path (12)
) is formed to be approximately perpendicular to the platen (2), and the document (11) passing through this vertical conveyance section (9)
) has its conveyance direction changed by the document reversing means (20) to a direction substantially perpendicular to the platen (2), so the document (11) is not bent and is transferred to the vertical conveyance section (9). It is designed to be transported smoothly along the inner wall.

Next, the original (11) is conveyed to the original insertion side of the platen (2), and after being conveyed to a predetermined position on the platen (2) by the endless conveyor belt (15), it is placed inside the copying machine main body (1). A provided image forming device (not shown) is operated to make a copy.

Next, when the copying is completed, the endless transport belt (15) rotates, the copied original (11) passes through the original ejection path (16), and the original document receiver is transported to the tray (4). The one-sided copy is completed.

In addition, in a copying machine incorporating this document conveyance device, copy paper is ejected to a tray with the copy side facing up, and a copy paper tray (not shown) is placed in the tray. Since the copy sheets copied in order from the original (11) with larger pages are ejected with the copy side facing up, the page order of the original (11) and the page order of the copied copy sheets can be easily matched. have.

On the other hand, in order to perform double-sided copying with this device, as shown in FIG. 4, a plurality of originals (11) are stacked and accommodated in the original tray (3) with the pages aligned and the copy side facing down.
Next, by operating the operation button to set the double-sided copy mode, the branch guide (24) is displaced to the position shown by the broken line.

Next, when you start the copy operation with the start button,
A document (11) with pages 0 and n+1 is ejected from the document tray (3), and the document (11) is rotated in the conveying direction by the document reversing means (20) of the document sending and conveying path (9). The changed page is conveyed to the platen (2) side with the nth page facing down, passes through the document discharge path (16) and the feedback conveyance path (17) without being copied, and is fed back into the document discharge conveyance path (12). (See Figure 5). At this time, the leading edge of the original (11) is connected to the limit switch (2).
7), the drive roller (30) of the document conveyance means (23) is controlled to stop rotating based on the signal from the limit switch (27) and rotate again for a predetermined period of time. . Therefore, during transport, the above document (11)
Even if the document (11) is fed diagonally, the tip of the document (11) is in contact with the drive roller (30) and the pinch roller (31), and the slip rollers (32> (33) correct the diagonal feed. Then, the document is reliably transported into the document delivery path (12) without jamming or the like.

Next, the original document (11) is transferred to the original document sending conveyance path (11) again.
2) passes through the document reversing means (20), and the n+1
The page is conveyed to the platen (2) with the page facing down, placed at a predetermined position on the platen (2), and after the n+ith page is copied, the document is transferred to the document ejection path (16) and the feedback conveyance path (17). ) and fed back to the original document delivery path (12).

Then, the document (11) is conveyed to the platen (2) with the nth page facing down by the document reversing means (20), and the nth page is copied.
), the document receiver is conveyed to the tray (4), and the double-sided copying of the document (11) marked with page 0 and page n+1 is completed. Thereafter, in the same process, both sides of the original (11) in the original tray (3) are copied one after another, and the original in the original tray (4) is copied.
), and the copy paper tray of the copying machine main body (1) sequentially discharges the copy paper into the tray with the copy side facing up and in descending order of page size, so even during double-sided copying, the original (11 ) has the advantage that it is easy to match the page order of the copied copy paper with the page order of the copied copy paper.

As described above, in the document conveyance device according to this embodiment, the document tray (3) is arranged above the platen (2), and the device end side of the document feed-out conveyance path (12) is connected to the vertical conveyance section ( 9) and has a shape that does not protrude to the outside of the device, the device has the advantage of being able to downsize the entire device. ) is configured by the vertical conveyance section (9), the document (11) conveyed from the document tray (3) or the feedback conveyance path (17) is rotated in its conveyance direction by the document reversing means (20). the platen (2
), the document (11) has the advantage of being smoothly transported along the inner wall of the vertical transport section (9) without being bent.

[Effects of the Invention] As described above, in the present invention, the document tray is disposed above the document placement table, and the document feeding direction is reversed in the document delivery path, and the conveyance direction is set relative to the document placement table. Since the document reversing means for changing the direction to be approximately vertical is provided, and the portion of the document sending and conveying path from the document reversing means to the document placing table is formed to be approximately perpendicular to the document placing table. This has the effect that the document sending and conveying path can be arranged without protruding outward from the document conveying apparatus main body without impairing the conveyance of the document, and the apparatus can be miniaturized.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, FIGS. 1 to 3, and 5 are cross-sectional views of a document conveying device according to this embodiment, and FIG. FIG. 6 is an explanatory diagram showing the state of document storage stacked in the document tray of the apparatus, and FIGS. 6 and 7 each show a cross-sectional view of a conventional document conveying device. [Description of symbols] (2)...Platen (3)...Document tray (5)...Retard pad (6)...Paddle (7)...Document sending means (8)... S-shaped conveyance section (9)...Vertical conveyance section (10)...Reverse conveyance section (11)...Document (12)...Document feed-out conveyance path (15)...Endless conveyance belt (10)...Document discharge path (17)...Feedback conveyance path (18)...Drive roller (19)...Pinch roller (20)...Document reversing means

Claims (2)

[Claims] (1) A document tray, a document sending means for sending out the documents stored in the document tray, a document sending path for conveying the document from the document tray to the document platform, and a document feeding means for feeding the document stored in the document tray, and a document feeding path for conveying the document from the document tray to the document platform, and A document conveyance belt that conveys the document, a document discharge path that conveys the document from the document placing table to the document receiving tray, and a communication connection between the document discharge path and the document feed conveyance path that are arranged above the document conveyance belt. In the document transport device, the document tray is disposed above the document placement table, and the document feeding path includes a document tray disposed above the document placement table near the document insertion side. Alternatively, a document reversing means is provided for reversing the conveyance direction of the document conveyed from the feedback conveyance path and changing the conveyance direction to a direction substantially perpendicular to the document placing table, and the document reversing means of the document sending-out conveyance path is provided. A document conveying device characterized in that a portion from the means to the document placing table is formed to be substantially perpendicular to the document placing table. (2) The document feeding means is comprised of a paddle that feeds the documents stacked in the document tray from above and a retard pad that prevents double feeding of the documents. The document conveying device according to scope 1.