JPS6374838A - Cut sheet feeder - Google Patents

Abstract

PURPOSE:To make automatic paper feeding so as not to be done even if a key is misoperated, by forming a manual insertion port in utilizing motion of a front cover of a cut sheet feeder, while operating a manual mode selector switch. CONSTITUTION:A front cover 4 is attached to a paper holder 2 rotatable around a fulcrum 3, and when it is opened as rotating in an arrow B direction around the fulcrum 3, the lower outer surface comes off the back of a paper discharge tray 26, whereby a manual insertion port 27 for a cut sheet 8 is formed between them. The cut sheet 8 to be inserted from this manual insertion port 27 is fed toward space between a feed roller 21 and a pinch roller 22 as shown in an arrow C, and recorded. A manual mode selector switch being selected in interlocking with opening or closing the front cover 4 is attached to the side of the paper holder 2, and connected to a control circuit. Therefore, when the manual insertion port 27 is formed, the control circuit is selected to the manual mode, so that a paper feed roller 5 will not operate at all.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a paper holder into which cut sheets are loaded, which supports an openable and closable front cover, and is provided with a paper feed roller and an intermediate plate for holding the cut sheets inside. The present invention relates to the structure of a cut sheet feeding device comprising:

[Prior art]

The cutsheet 1 feeding device loads sheets of paper sized to a predetermined size in a stacked state, and automatically feeds them one by one to the recording side (printing section), etc.\:! It is widely used in various recording devices such as printers and copiers.

Generally, with the above type of cut sheet, the paper feed roller is supported by a bearing provided on the paper holder, and a spring is biased toward the paper feed roller between the paper holder and the paper feed roller. The cut sheets held between the paper feed roller and the middle plate are separated one by one by the rotation of the paper feed roller, and the cut sheets are fed on their own.

When loading cut sheets, open the front cover and turn the middle plate away from the paper feed roller by pa1,
In between, a cut sheet (sheet bundle) is inserted and its leading end is positioned below the separating claw, and then the middle f2 and front cover are returned to their normal positions and set.

By the way, when it comes to recording devices, there are cases where paper is manually inserted into the recording device, such as when feeding a cut sheet other than the standard size or when wanting to record from a desired position.
A manual insertion slot may be provided for this purpose.

However, conventional cut sheet feeding devices are generally operable even when feeding paper from the manual feed slot.
If the key is erroneously operated, the cut sheet feeding device will automatically feed the sheets, and there is a risk that two sheets will be fed into the recording section along with the manually inserted sheet.

It has also been proposed to provide a dedicated switch for manual insertion, but since it is a type of switch that selectively switches between automatic paper feeding mode and automatic paper feeding mode, there is still a possibility that the automatic paper feeding mode will operate due to a mistaken key operation. There was sex.

〔the purpose〕

An object of the present invention is to provide a cut sheet feeding device that can solve the problems of the prior art, and that automatically switches to manual feeding mode when feeding paper from the manual feeding slot, and that does not cause automatic paper feeding to operate even if a key is erroneously operated. The goal is to provide the following.

〔overview〕

In the above-mentioned type of cut sheet feeding device, the present invention forms a manual feed insertion slot by opening the front cover, and in conjunction with this, operates a manual feed mode changeover switch to disable the paper feed roller. This configuration achieves the above object.

〔Example〕

The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a cut sheet feeding device according to an embodiment in an automatic sheet feeding state, and FIG. 2 shows the device shown in FIG. 1 with the front cover opened and the sheet in a manual feeding state.

In FIGS. 1 and 2, a cut sheet supply device is detachably set in a main body 1 of a recording device such as a printer.

In this cut sheet feeding device, a front cover 4 is attached to a paper holder 2 via a fulcrum 3 so that it can be opened and closed (swung), and a paper feed roller 5 that is pivotally supported by the paper holder 2 is disposed in the space between them. has been done. The paper feed rollers 5 are arranged at two locations at a predetermined interval and are driven via a roller shaft 6 during automatic paper feeding.

An intermediate plate 9 for holding cut sheets 8 is provided between the paper feed roller 5 and the paper holder 2 and is biased toward the paper feed roller by a spring 7. This middle plate 9 has an ear portion l at the rear end.
O is inserted into the slot 11 of the paper holder 2, and is attached so as to be swingable about the slot as a fulcrum.

That is, a cam 13 of a camshaft 12 that is rotatably supported by the paper holder 2 is in contact with the ear portion 10 of the middle plate 9, and by rotating the cam 13 with a lever (not shown) or the like, the middle Fi 9 is pushed down. The cut sheet 8 can be separated from the paper feed roller 5.

Paper holder 2 has cut sheet 8 paper +j on both sides.
A separating claw support member 16 is swingably attached to each width regulating plate via a fulcrum 15.

A sheet 8 is attached to the tip of each separation claw support member 16 during automatic paper feeding.
Separation claws 17 are formed to separate the layers from the top layer one by one. Further, each of the claw support members 7411 is formed with an ear portion 18 that extends inward and can engage with the side edge of the middle plate 90,
When the middle plate 9 is pushed down, the separation claw 17
can be swung upwards.

The paper feed roller 5 is operated by a motor 19 as a one-way roller.
It is driven only in the paper feeding direction via the

When automatically feeding the cut sheets 8, when the paper feed roller 5 is driven in the direction of the arrow in the state shown in FIG. While being formed, it is separated onto the upper side of the separating claw. The separated cut sheet 8 is fed through the paper feed port 20 as shown by arrow A between the paper feed roller 21 and the pinch roller 22 of the recording apparatus.

The sheet that has been cut into the paper feed mechanism in this way is transferred to the platen 23 and the recording head 24 by the paper feed roller 21.
It is sent to the printing section in between.

The recorded cut sheet 8 is ejected from the recording device and sent to a paper ejection device having a paper ejection roll 25 and a paper ejection tray 26 attached to a cut sheet supply device. In the illustrated example, the paper ejection tray 26 is the paper holder 2.
The paper ejection roll 25 is pivotally supported by the paper ejection tray.

The front cover 4 is attached to the paper holder 2 so as to be rotatable around a fulcrum 3, and in the automatic paper feeding state shown in FIG. However, when it is opened by rotating clockwise around the fulcrum 3 (in the direction of arrow B) as shown in FIG. A cut sheet manual insertion slot 27 is formed in the cut sheet.

The cut sheet inserted from this manual insertion slot 27 is inserted between the paper feed roller 21 and the pinch roller 22 as shown by arrow C.
Paper is fed between the two and recorded (printed, etc.) in the same way as in the case of automatic paper feeding described above.

As shown in FIG. 3, a manual feed mode changeover switch 28 is attached to the side of the paper holder 2, which is switched in conjunction with opening and closing of the front cover 4.

This changeover switch 28 is connected to the wiring 29 and the connector (
(not shown) is connected to the control circuit of the recording device, and detects when the front cover 4 is opened, that is, when the manual insertion slot 27 is formed, and sends a signal to the control circuit. It is. When the control circuit receives the signal, the automatic paper feeding mode is switched to the manual feeding mode, and the control circuit is switched to a mode in which the paper feeding roller 5 is not operated, that is, a mode in which the paper feeding roller 5 is not operated even if there is an erroneous operation of a key, etc. It will be done.

In FIG. 1, the paper feed rollers 5 are arranged at, for example, two locations at a predetermined interval in the middle direction of the cut sheet 8, and ribs are provided on the inner surface of the front cover 4 and near the rear of each paper feed roller 5. When the front cover 4 is opened and the cut sheet 8 is loaded, the guide member 30, which has a protruding guide member 30, guides the front end of the guide cut sheet to the lower side of the paper feed roller 5, that is, to the middle plate 9 side. It is located at a position that guides the user to the loading position.

Further, on both sides of the inner surface of the front cover 4 and with the separation claws 17
A second guide member 31 is provided protruding from a position near the rear of. This second guide member 31 is connected to the front cover 4
When the cut sheet 8 is opened and the cut sheet 8 is loaded, the guide is provided at a position to guide the front end of the cut sheet to the lower side of the separation claw 17 (toward the middle plate 9 side).

Each of the guide members 30, 31 can be integrally molded with the front cover 4, which is a molded product of plastic or the like, or can be provided by fixing a single part of plastic, metal, or the like.

According to the above embodiment, the inner surface of the front cover 4 is used to provide the guide members 30 and 31 for loading the force/gutter sheet 8, and the outer surface of the guide front cover is used to form the manual insertion slot 27. , front cover 4
It was possible to provide multiple functions to the device, simplifying the structure, making it more compact, and reducing costs.

Furthermore, when the front cover 4 is opened, the manual feed mode changeover switch 28 is activated and automatically switches to the manual feed mode in which the paper feed rollers do not operate, so even if a key is accidentally pressed during manual paper feed, the automatic paper feed This improves the operability of automatic and manual paper feeding.

〔effect〕

As is clear from the above description, according to the present invention, the movement of the front cover is used to form the manual feed insertion slot and operate the manual feed mode changeover switch.
A cut sheet feeding device is obtained which achieves a compact structure and the operability of manual sheet feeding.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a cut sheet feeding device according to an embodiment of the present invention in an automatic paper feeding state, FIG. 2 is a longitudinal sectional view of the device shown in FIG. 1 in a manual paper feeding state, and FIG. 3 is a manual paper feeding state. FIG. 6 is a partially enlarged edge sectional view showing the operation of the mode changeover switch. 2---Paper holder, 4---Front cover, 5---Paper feed roller, 8---One cassette sheet, 9---One middle plate, 27---Manual feed slot ,2
B-・-Manual feed mode selector switch.

Claims (1)

[Claims] (1) In a cut sheet feeding device that supports a front cover that can be opened and closed on a paper holder into which cut sheets are loaded, and is provided with a paper feed roller and an intermediate plate for holding cut sheets inside the front cover, the front cover is When opened, it forms a manual insertion slot, and
A cut sheet feeding device characterized in that a manual feed mode changeover switch is actuated in conjunction with this to disable the paper feed roller.