JP3176452B2 - Paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device capable of pulling out a sheet feeding tray in a direction orthogonal to a sheet conveying direction.

[0002]

2. Description of the Related Art The original purpose of a back fluence is to regulate the rear end position of a sheet separated by a sheet separation roller pair and returned to the sheet supply tray side. It must be located near the center, but it is desirable to retreat to a position that does not hinder the sheet replenishment operation in the sheet replenishment state. The evacuation mechanism of the back fence is disclosed in Japanese Patent Application Laid-Open No. 64-227.
No. 33, JP-A-1-156135.

[0003]

However, in the above-mentioned conventional apparatuses, there is a problem that the mechanism and the control become complicated because each of them has a drive source such as a motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet feeding apparatus having a back fence which does not require a driving source for moving the back fence and has a simple moving mechanism.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper feed tray capable of storing a large number of sheets and being drawn out in a direction perpendicular to the sheet conveying direction, and a paper separating roller for separating and conveying the sheets one by one. In a paper feeder having a pair and a back fence for regulating a rear end position of a sheet separated by the paper feed separation roller pair and returned to the paper feed tray side, the back fence slides on the paper feed tray.
It is provided freely, and is located near the center of the sheet width in the sheet passing state in conjunction with the loading and unloading of the sheet feeding tray, and is the same as the movable direction of the sheet feeding tray in the sheet replenishing state.
Go to direction is achieved by first means arranged to retract to a position not to interfere the sheet supply.

[0006]

[0007] The above objects are achieved by a first means, a position where the Batsukufuensu is retracted is achieved by the second means outside the scope of the width of the sheet.

[0008]

In the first means, when the sheet is passed, the sheet is located near the center of the sheet width and regulates the retreat position of the sheet separated by the sheet separation roller pair and returned to the sheet tray, thereby replenishing the sheet. In this state, the back fluence located outside the width of the sheet is moved by a mechanism interlocking with the human action of taking in and out of the sheet feeding tray so as not to hinder the sheet replenishment work. No control is required, and the structure can be further simplified.

In the second means, since the direction in which the back fluence moves for evacuation is the same as the direction in which the paper feed tray is movable, the back fluence can be easily interlocked with the operation of taking in and out the paper feed tray.

In the third means, since the position where the back fluence is retracted is outside the range of the sheet width, the sheet replenishing operation does not hinder the sheet supply operation.

[0011]

FIG. 1 is a perspective view of a paper feeder according to an embodiment with a paper feed tray pulled out, FIG. 2 is a partially cutaway perspective view of the paper feeder according to the embodiment, and FIG. 3 is a back fluence portion. It is a perspective view of.

The paper feeder main body 10 stores a large number of sheets and can be pulled out in a direction perpendicular to the sheet transport direction. The paper feed roller pair 30 separates and transports the sheets one by one. And a back fence 40 for regulating the rear end position of the sheet separated by the sheet feed separation roller pair 30 and returned to the sheet feed tray 20 side, and a frame 50 for supporting each member.

The back fence 40 is supported by a back fence bracket 41 and is slidably engaged with a rear plate 21 constituting the paper feed tray 20 by a stepped screw 22 in a direction orthogonal to the sheet conveying direction. I have.

The back fluence bracket 41 includes a projection 41a which abuts on the front frame 50a, a rear end 41b which abuts on the rear frame 50b, and a stepped screw 22.
And a guide groove portion 41c for slidably guiding by inserting
And a support plate 41d supporting the back fluence 40.

Next, the operation of the embodiment will be described.

As shown in FIG. 1, when the paper feed tray 20 is pulled out, the projection 41a of the back fluence bracket 41 abuts on the front frame 50a, whereby the back fluence 40 stops outside the width of the sheet. Therefore, there is no hindrance to the sheet supply operation.

On the other hand, as shown in FIG.
Is set on the main body 10, the back end 41b of the back fluence bracket 41 abuts on the rear frame 50b. The original purpose of regulating the rear end position of the sheet returned to the side is achieved.

According to the above-described embodiment, in the sheet passing state, the sheet retreating position which is located near the center of the sheet width and is separated by the sheet separating roller pair and returned to the sheet feeding tray 20 is regulated. In the replenishment state, the back fluence 40 located outside the width of the sheet is moved by a mechanism linked to a human action of taking the sheet tray 20 in and out so as not to hinder the sheet replenishment operation. No source and its control is required, and the structure can be further simplified.

Further, since the direction in which the back fluence 40 moves for retreat is the same as the direction in which the paper feed tray 20 is movable, it can be easily interlocked with the operation of taking the paper tray 20 in and out.

[0020]

According to the first aspect of the present invention, in the sheet passing state, the sheet retreating position which is located near the center of the sheet width and separated by the sheet separating roller pair and returned to the sheet feeding tray side is set. In order to prevent the sheet replenishment work from hindering the sheet replenishment work in the sheet replenishment state, the back fluence located outside the width of the sheet is moved by a mechanism linked to the human action of taking in and out the paper feed tray. ,
A drive source and its control are not required, and the structure can be further simplified.

Further, according to the first aspect of the present invention, since the direction in which the back fence moves for retreat is the same as the direction in which the paper feed tray is movable, it easily interlocks with the operation of moving the paper feed tray in and out. be able to. In addition,
The projection does not protrude outside, so during a series of paper feeding operations
It does not cause obstacles and also interferes with other tasks
It won't be.

According to the second aspect of the present invention, the retreat position of the back fluence is out of the range of the width of the sheet.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sheet feeding device in a state where a sheet feeding tray of a sheet feeding device according to an embodiment of the present invention is pulled out.

FIG. 2 is a partially cutaway perspective view of the sheet feeding device according to the embodiment of the present invention.

FIG. 3 is a perspective view of a back fluence portion of the sheet feeding device according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 paper feeder main body 20 paper feed tray 21 rear side plate 22 stepped screw 30 paper feed separation roller pair 40 back fluence 41 back fluence bracket 41 a projection 41 b rear end 50 frame 50 a front frame 50 b rear frame

Claims (2)

(57) [Claims] 1. A sheet feeding tray which stores a large number of sheets and can be pulled out in a direction orthogonal to a sheet conveying direction;
A sheet feeding apparatus having a sheet feeding separation roller pair for separating and conveying sheets one by one and a back fence for regulating a rear end position of the sheet separated by the sheet feeding separation roller and returned to the sheet feeding tray side. The back fence is slidable on the paper tray
The sheet feeding tray is located near the center of the sheet width in the sheet passing state in conjunction with the loading and unloading of the sheet feeding tray, and in the same direction as the movable direction of the sheet feeding tray in the sheet replenishing state.
A sheet feeding device configured to move and retract to a position where sheet feeding is not hindered. 2. The sheet feeding device according to claim 1, wherein the position where the back fence is retracted is out of a range of a sheet width .