JPS61124467A - Sheet material conveying device - Google Patents

Abstract

PURPOSE:To enable a paper feeding side operator to easily watch a discharged sheet material without need for using any particular original-paper receiver by making a guide member which guides a conveyed sheet and make it U-turn, rotatable and combinedly using the member as a discharging tray after the guide is released. CONSTITUTION:With an ordinary sheet of original paper, a reversing tray 16 is closed, and a sheet of original paper on the top of piled sheet of original paper is delivered by means of an automatic paper feeding device ADF 14, and guided to pass through a fore conveying roller 2 and, after the original paper is read, it is guided to pass through a rear conveying roller 6, reversed by means of a reversing tary 16, and discharged upside down onto a paper discharging tray 8 by means of a paper discharging roller 11. With a sheet of original paper the length of which is shorter than the distance between the rear conveying roller 7 and the paper discharging roller 11, on the other hand, the sheet of original paper can be piled on the reversing tray 16 by opening the reversing tray 16. As with a kind of original paper which may jam at a gap between an inner original-paper guide 9 and the reversing tray 16, and at the paper discharging roller part 11, or a thick sheet of original paper, it can be held by the end part 20 of the reversing tray 16 also by opening the reversing tray 16. Thereby, the operating quality can be improved.

Description

[Detailed Description of the Invention] [Scope of Industrial Application] The present invention is applicable to sheet material conveying devices, in particular, for example, copying machines,
The present invention relates to a sheet material conveying device used in image forming apparatuses such as facsimile machines and laser printers.

[Conventional technology]

Conventionally, as shown in Figure 5, the document moves in a straight line from the paper feed side (right edge in the figure) to the paper output side (left edge in the figure), or as shown in Figure 6, the document moves in a straight line. The document is making a U-turn from the side to the ejection side.

Further, an automatic document feeder (ADF) of a top-reading document reading device sequentially feeds documents from the top so that an operator can easily see which document is being read while the machine is operating. By sending the top original of the originals stacked on the ADF, the weight of the original can be utilized and the performance of the ADF can be improved. The mechanism is such that it is sent sequentially from

In the device shown in Fig. 5 that has such an ADF mechanism, the document moves in a straight line from the paper feed side to the paper ejection side, so the topmost document at the time of paper feeding is It ends up being the bottom manuscript. There was a drawback that it took time and effort to rearrange the order of the manuscripts.

On the other hand, the sixth device has an ADF mechanism that feeds documents sequentially from the top.
In the device shown in the figure, the originals are reversed from the paper feed side to the paper ejection side, so the stacking order of the originals at the time of paper feeding and the stacking order of the originals at the time of paper ejection are the same.

The original is turned over. However, when feeding the document P that is shorter than the distance between the rear conveyance roller 7 and the paper discharge roller 11, or when the document P' is of a type that may jam due to the gap between the inner document guide 9 and the outer document guide 10, Then, open the outer document guide 10 around the upper rotation center 13 (see FIG. 7) and take the document out.

[Problem that the invention seeks to solve]

At this time, it is necessary to provide a document receiver 14 like a tray on the outside where the document is ejected, or to have the operator pick up the ejected document by hand. If you are on the paper feed side, there are drawbacks such as difficulty in seeing the document p (p') being ejected by the open outer document guide 10.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and it is not necessary to provide a special document tray, and furthermore, the operator on the paper feeding side can easily see the ejected sheet material. An object of the present invention is to provide a sheet material conveying device.

〔Example〕

The present invention will be explained below based on one embodiment shown in one figure.

1 to 4 show examples of the present invention, in which 1 is a front conveyance roller that presses a front conveyance roller 2 with a constant force, and 2 is a front conveyance roller that rotates with the rotation of a motor and provides a driving force to the document. ,3
4 is a fluorescent light source, 4 is a lower document guide that guides the document, 5 is an optical reading position, 6 is a rear conveyance roller that presses the rear conveyance roller 7 with a constant force, and 7 is synchronized with the front conveyance roller 2. The conveyor roller rotates and provides propulsion to the document,
8 is a paper ejection tray, 9 is an inner document guide, 11 is a paper ejection roller that rotates in synchronization with the front transport roller 2 and rear transport roller 7 and provides a driving force to the document, and 12 is a paper ejection drive shaft 11 with a constant force.
14 is an automatic document feeder (ADF) that feeds out documents sequentially from the top, 16 is a reversing tray that serves as an outer document guide and a paper output tray, 17 is a short document, 18 19 is a long document, and 19 is the center of rotation of the reversing tray.

In a document reading device that has a mechanism that sequentially feeds out the stacked documents from the top in the on-document scanning mode, the order in which the documents are ejected is the same as the order in which the documents were fed. As shown in Figure 1, the reversing tray 16 is closed, and the ADF 14 allows one of the loaded documents to be opened.
The top original is sent out, passes through the front conveyance roller 2, is read, passes through the rear conveyance roller 6, is reversed by the reversing tray 16, and is moved by the discharge roller 11 to the discharge tray 8.
The original is ejected face down. In this way, ADF14
By sequentially feeding out the stacked originals from the top, the originals are stacked upside down on the paper discharge tray 8 in the same order as when they were fed.

On the other hand, a document whose length is shorter than the distance between the rear conveyance roller 7 and the discharge roller 11 is not discharged onto the reversing tray 8 as shown in FIG. 4, so the reversing tray 16 is opened as shown in FIG. As a result, the originals are loaded on the reversing tray 16 (
(Fig. 3), the reversing tray 16 as shown in Fig. 2 can also be used for documents that may jam in the gap between the inner document guide 9 and the reversing tray 16, or for thick originals that may jam at the paper ejection roller.
The document is held by the end 20 of the reversing tray by opening it (FIG. 4).

The above is an explanation of the embodiment of the sheet material conveying device according to the present invention, but it goes without saying that the present invention is not limited to this embodiment.

For example, although the document reading device has been described, by providing a recording section in place of the optical reading position shown in FIG.
It is also applied to recording devices.

In addition, even when conveying a long sheet material that can be turned in a U-turn, if the sheet material jams near the rollers 6.7, open the outer document guide 16 as shown in FIG. The sheet material can be discharged. At this time, -r% of the groove and eggplant in the outer manuscript guide IFEI lower blade.
Even if you are in Kashiwamochika 1, you can easily remove the jam by turning your hand.In the conventional configuration shown in FIG. is inhibiting.

Further, the inner document guide 9 is not necessarily required.

Furthermore, even when conveying a sheet material that can be turned in a U-turn, it is of course possible to release the guide of the outer document guide and discharge the sheet material straight ahead.

Further, an auxiliary conveyance roller may be provided in the middle of the U-turn guide.

As explained above, a paper conveying device is provided with a reversing tray that makes a U-turn on the paper, and the rotation center is below the reversing tray, and an opening/closing mechanism is attached to the reversing tray so that it can act as a paper ejection tray when opened. By installing 1. When normal originals are being loaded, the reversing tray is closed and the originals are stacked on the output tray in the same order as when they were loaded. In contrast, the reversible tray can be opened and the reversible tray can be used instead of the tray. In other words, documents with a short length can be loaded on the reversing tray 16, and documents with a long length can be guided by the reversing tray 16.

〔Effect of the invention〕

Since the sheet material conveying device according to the present invention has the above-described structure, the structure is simplified and the device has excellent operability.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, which is a front cross-sectional view of a top-reading document reading device in which the rotation center of the mechanism unit (reversing tray) for U-turning the document is below the reversing tray;
The figure is a front sectional view of the one in Figure 1 with the reversing tray open, Figure 3 is a front sectional view of the one in Figure 2 with a short document loaded on the reversing tray, and Figure 4 is a front sectional view of the one in Figure 1 with the reversing tray open. 2 is a front sectional view of a long document being held on the reversing tray in the state shown in FIG. 2, FIG. A front cross-sectional view of an example of a top-reading original reading device that does not have a mechanism for making a U-turn on the original. FIG. FIG. 8 is a front sectional view of the U-turn mechanism (outer document guide) in which the center of rotation is above the outer document guide, and FIG. 8 is a front sectional view of the device shown in FIG. 7 with the outer document guide open. 1 is the front conveyance roller, 2 is the front conveyance roller, 3 is the fluorescent lamp, 4 is the document lower guide, 5 is the optical reading position, 6 is the rear conveyance roller, 7 is the rear conveyance roller, 8 is the paper output tray, 9 is the inner Document guide, 10 is the outer document guide, 11 is the paper ejection roller, 12 is the paper ejection roller, 13 is the rotation center of the outer document guide, 14 is the AD
F, 15 is a paper ejection roller, 16 is a reversing tray, 17 is a short original, 18 is a long original, 19 is the rotation center of the reversing tray, 2
0 is the end of the reversing tray.

Claims (1)

[Claims] (1) A feeding means for conveying the sheet material, a first state in which the conveyed sheet material is guided in an upward U-turn, and a position below the first state in which the guide of the conveyed sheet material is released. A sheet material conveying device comprising: a guide member that is rotatably supported so as to be able to assume a second state, and which also serves as a sheet material discharge tray in the second state.