JPH0430016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet tray device for copying machines, printing machines, recording machines, and other machines (hereinafter referred to as copying machines) that have sheets for collecting sheets that are conveyed. This invention relates to a sheet tray device that can store sheets with at least one side aligned.

Conventionally, in this type of sheet tray device, for example, in a transfer method double-sided copying machine, etc., the so-called intermediate tray (tray that temporarily stores sheets that have been copied on one side) has problems such as lateral shift and leading edge timing for the next back side copy. In order to correct this, the materials are aligned using an optical or mechanical detection means before being fed again, but this method has disadvantages such as the alignment means being complicated and large.

In addition, this method is not limited to double-sided copying machines, and has the disadvantage that if the discharged sheets are not aligned and are not aligned when they are collected, it is extremely inconvenient when binding the sheets afterwards.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a novel sheet tray device that is improved in view of these drawbacks.

Another object of the present invention is to provide a sheet tray device that can align and stack conveyed sheets with a simple configuration.

That is, the main structure of the present invention that can achieve the above object is that, in a sheet tray device such as a copying machine that collects conveyed sheets, a sheet stacking section that stacks conveyed sheets; a arranging part for arranging two surfaces, a front surface and an end surface, of the sheets; A sheet tray device comprising: a sloped portion that is inclined so that a pressing force acts on the sheets on the sheet stacking portion;

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic sectional view of a double-sided copying machine to which the sheet tray device of the present invention can be applied. In the figure, sheets 2 stacked on a cassette 1 are separated and fed one by one from a paper feed roller 3, then passed through a timing roller 4, a toner image is transferred from a photosensitive drum 5 at a transfer section, and then transferred to a fixing roller. 6, and is temporarily stored and stacked on the intermediate tray 7. Next, paper is fed from this intermediate tray 7 by a paper feed roller 8, conveyed to a transfer section via a timing roller 4, passes through a fixing roller 6, and is ejected to a paper ejection tray 9, where toner images are formed on both sides of the sheet. is formed.

Next, referring to FIG. 2, the sheet tray device will be explained in detail. FIG. 2 is a perspective view of the sheet tray device. In the figure, a single-sided copy sheet 2 is transported in the direction of arrow A by a transport roller 10 and stored in an intermediate tray 7. A portion of the sheets stored in the intermediate tray 7 is placed on an inclined surface 7 ₁ (a portion inclined at a constant angle θ with respect to the sheet stacking portion 7 ₂ of the intermediate tray 7) formed at one corner of the intermediate tray. It is placed and loaded.

Therefore, the stacked sheets have their slopes 7 ₁
The end face ₇ of the intermediate tray receives a pressing force due to the force of the sheet's own weight in a direction diagonal to .
and the front surface ₇₄ . Therefore, this pressing force then pushes the sheet onto the intermediate tray 7.
The slope portion 7 ₁ acts in the direction of feeding from
is preferably formed at one of both rear corners with respect to the sheet feeding direction.

The sheets stacked in this state are separated one by one from the lower side of the intermediate tray 7 by a paper feed roller 8 and sent out. 11 and 12 are conveyance rollers and guides at that time. The sheets stacked in the intermediate tray 7 are fed after being aligned in the intermediate tray 7, so there is no need for any special alignment means. For example, in the case of double-sided copying, the front and back sides of the sheets are You can accurately align the sides.

Note that this sheet tray device is applicable not only to the double-sided intermediate tray but also to any device that requires alignment of sheets stacked on the tray.
The object of the present invention can be sufficiently achieved by arranging the tray ₂ substantially horizontally and making only one corner of the tray an inclined surface with respect to the horizontal plane.

As described above, according to the configuration of the present invention, sheets stacked on a tray can be aligned with a simple configuration.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a copying machine to which the present invention can be applied, and FIG. 2 is a perspective view of the present invention. In the figure, 7 is the intermediate tray, 7 ₁ is the slope part,
7 ₂ is a sheet stacking section.

Claims (1)

[Scope of Claims] 1. In a sheet tray device such as a copying machine that collects sheets that are being conveyed, a sheet stacking section that stacks sheets that are being conveyed; an alignment section for aligning the surfaces; and a placement section located at one corner of the sheet stacking section and at a diagonal position of the alignment section, and a force that presses the two surfaces toward the alignment section is applied to the sheet stacking section. A sheet tray device comprising: a slope section that is inclined so as to act on sheets on a stacking section;