JPH0840576A - Paper feeding device - Google Patents

Abstract

PURPOSE:To enable easy installation even in a narrow place by providing a first paper feeding cassette with a paper sheet passage on the sheet delivery side, and conveying sheets, fed from a second paper feeding cassette through a second feed roller, to a device body through the sheet passage. CONSTITUTION:The required number of paper feeding cassettes 7 with paper sheets 8 of different sizes placed in sheet receiving plates 7a are prepared and mounted in the stacked state on the lower side of a copying machine body 1. When a copying switch is pressed by the copying machine body 1, driving force is supplied from the copying machine body 1 to the feed roller rotating means of the paper feeding cassette 7 with the sheets 8 accommodated therein, so that a feed roller 10 is rotated to feed the sheet 8. The sheet 8 is delivered to a carrier path 19 by a carrier roller 18 so as to reach a register roller 20. A photoreceptor 2 is rotated by the on-operation of a paper sheet detecting switch 24, and the sheet 8 is photocopied and discharged to the discharge tray 25 of the copying machine body 1. Since the paper feeding cassettes can be thus stored in the stacked state on the lower side of the device, there is no need to store the paper feeding cassettes in another place.

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 in a recording apparatus such as a copying machine, which is capable of increasing the required number of sheet feeding cassettes containing sheets of different sizes.

[0002]

2. Description of the Related Art A conventional recording apparatus, for example, a relatively small copying machine, is provided with a plurality of sheet feeding cassettes b which can be inserted into a lower portion of a main body a as shown in FIG. When copying is performed on the sheet c fed from the sheet b, and when the sheet c of the required size is not in the sheet feeding cassette b, the sheet c is replaced by a separately prepared sheet feeding cassette b.

[0003]

However, in the copying machine as described above, since the paper feed cassette b largely projects to the side of the main body a, a lot of places are required to install the main body a, and the main body a is required. Even if the device itself is miniaturized, the effect that it can be easily installed in a narrow space is lost. In addition, since the number of paper feed cassettes that can be attached to the main body a is small, the paper feed cassette b must be stored in another place, and a storage place is required.

[0004] On the other hand, the applicant has filed a Japanese Patent Application No. 58-1196.
Japanese Patent Application Laid-Open No. 60-6538 discloses an application for a sheet feeding device that does not require a storage location for the sheet feeding cassettes by making the sheet feeding cassettes in multiple stages. However, in this paper feeding device, a part of the paper feeding cassette is projected to the outside of the main body of the copying machine, so that the problem that the effect of being easily installed in the narrow space is impaired is inevitable.
The present invention has been made for the purpose of improving the above-mentioned conventional problems.

[0005]

In order to achieve the above object, the present invention provides a first sheet feeding cassette for accommodating sheets and provided in a lower stage with respect to a main body of the apparatus, and a first sheet feeding cassette. A first paper feed roll that rotates so as to send out the accommodated paper toward the apparatus body, and a second paper feed cassette that accommodates the paper and is provided in a lower stage with respect to the first paper cassette. And a second paper feed roll that rotates so as to send the paper stored in the second paper feed cassette toward the apparatus main body, the first paper feed cassette Has a slit-shaped paper passage formed on the paper delivery side, and conveys the paper delivered from the second paper feed cassette by the second paper feed roll to the apparatus main body through the paper passage. It is the one.

[0006]

[Operation] The paper feed cassette can be stacked under the main body of the device, so that the main body can be easily installed even in a narrow space. In addition, there is no need to store the paper feed cassette separately. Location can be eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 3, 4, 5 and 6. In the drawing, reference numeral 1 denotes an apparatus main body, for example, a copying machine main body. Various devices necessary for copying, such as the photoconductor 2, the developing device 3, the transfer device 4, the fixing device 5, and the cleaning device 6, are accommodated therein. Reference numeral 7 denotes a plurality of paper feed cassettes that can be mounted in the lower portion of the copying machine main body 1 in a stacked state. For example, the first paper feeding cassette is below the copying machine main body 1 and the other is below. It is provided as a second paper feed cassette and has a flat box shape with a periphery substantially the same as that of the copying machine main body 1, and a paper tray 7a capable of accommodating paper 8 of different sizes is inserted therein. It is detachable. A bottom plate 7 urged upward by a spring 9 is attached to the bottom of the paper tray 7a on one end side.
b is provided, and the bottom plate 7b allows the paper accommodating portion 7
One end side of the paper 8 accommodated in a is pressed from below onto the paper feed roll 10 provided for each paper feed cassette 7 above the bottom plate 7b. Paper feed roll 1
0 is rotationally driven via a gear 12 by a paper feeding roll rotating means 11 such as a motor provided on the side of each paper feeding cassette 7, and the paper feeding roll rotating means 11 drives each paper feeding cassette 7 to rotate. When mounted on the lower side of the main body 1 of the copying machine,
The driving force transmitting means forms a transmission path connected to the driving force supplying means (not shown) on the copying machine main body 1 side.

The driving force transmitting means is used for each sheet feeding cassette 7.
One of the connectors 13a of the connector 13 is connected to the paper feed roll rotating means 11 of FIG. 1 through the lead wire 14, and the other 13b of the connector 13 is connected to the one 16a of the connector 16 of the copying machine main body 1 through the lead wire 15. However, the driving force supplied from the driving force supply means on the copying machine main body 1 side is supplied to the paper feed roll rotating means 11.

On the other hand, the paper tray 7a of the paper cassette 7
At the side end of the paper feed roll 10 of the paper 8 accommodated in the
A cone snubber 17 is provided to give a judgment to the paper 8 fed by the paper feed roll 10 to prevent the paper 8 from being fed multiple times, and to prevent the paper 8 from being fed multiple times.
A guide surface 7c having a concave arc shape for guiding the leading end of the paper 8 fed by the paper feed roll 10 upward, and a paper feeding cassette 7 on the lower side at the paper feeding side end which is the feeding side of the paper. A slit-shaped paper passage 7d is formed for passing the paper 8 that has been paper, that is, sent out by the lower paper feed roll 10. When the paper feed cassettes 7 are stacked in a required number of stages, the paper feed cassette A paper transport path communicating from the 7 side to the copying machine main body 1 side is formed, and the paper 8 fed from the lower paper feeding cassette 7 is formed in the upper paper feeding cassette 7. Copy machine main body 1 via passage 7d
It is designed to be transported to.

A handle 7e is formed at an end of the paper tray 7a opposite to the paper feed side by recessing a part of the paper tray 7a so that the paper tray 7a can be pulled out by the handle 7e. Has become. On the other hand, the paper 8 fed from the paper feed cassette 7 is conveyed to a conveyance path 19 by a conveyance roll 18 provided in the copying machine main body 1, and further via a registration roll 20 provided in the conveyance path 19. Photoconductor 2
And the transfer device 4. In addition,
In the figure, reference numeral 21 denotes a paper insertion port for manual copying, and reference numeral 22 denotes a moisture-proof film such as a conductive mylar provided at a connecting portion between the copying machine main body 1 and the paper passage 7d of the uppermost paper feed cassette 7.

Next, the operation will be described. In use, a required number of paper feed cassettes 7 containing papers 8 of different sizes in a paper tray 7a are prepared and stacked on the lower side of the copying machine main body 1. Mounted in a state, the driving force supply means on the side of the copying machine main body 1 and the sheet feeding roll rotating means 11 of each sheet feeding cassette 7 are connected via the driving force transmission means composed of the connectors 13 and 16 and the lead wires 14 and 15. To do. Next, to start copying, a sheet size is selected by a selection means (not shown) on the copying machine main body 1 side and the copy switch 23 is pressed, so that the sheet feeding roll of the sheet feeding cassette 7 in which the sheet 8 of the selected size is accommodated. A driving force is supplied to the rotating means 11 from the copying machine main body 1 side to rotate the paper feed roll 10, and the paper 8 is fed. The fed paper 8 is sent out to the transport path 19 by the transport roll 18, reaches the registration roll 20 after turning on the paper detection switch 24 provided in the transport path 19. When the paper detection switch 24 is turned on, the photoconductor 2 is rotated, and a copy is made on the paper 8 in a normal copying process. Then, the copy-completed sheet 8 is discharged to a discharge tray 25 provided on the side of the copying machine main body 1.

In the above operation, since the photoconductor 2 and the paper 8 are synchronized by the signal from the paper detection switch 24 provided in the middle of the conveying path 19, the paper feed cassettes 7 stacked in a plurality of stages are provided. Even if there is a time difference from the respective stages until the sheet 8 reaches the copying machine main body 1, the copying timing does not shift.

FIG. 7 shows another embodiment in which the sheet 8 is separated without using a cone snubber. The sheet 8 accommodated in the sheet tray 7a of the sheet cassette 7 is fed to the sheet feed roll 10 by the sheet feed roll 10. The paper tray 7 is retracted by reversing the
After feeding the sheet 8 by bringing the sheet 8 into contact with the rear wall 7f, the sheet feeding roll 10 may be rotated in the forward direction to feed the sheet.

[0014]

As described above in detail, according to the present invention, since the paper feed cassette can be mounted and used in a state of being stacked on the lower part of the main body of the apparatus, the main body of the apparatus can be easily installed in a narrow place and the paper feeding There is no need to store the cassette because there is no need to store it separately. And since the number of required paper cassettes can be increased in the vertical direction, a plurality of paper cassettes can be installed in a small space.
The device itself can be downsized and the space can be saved. In addition, since a paper passage for passing the fed paper is provided in the paper feeding cassette, the paper in each paper feeding cassette is set in the paper feeding cassette without providing a paper conveyance path outside the paper feeding cassette. The paper can be fed to the main body, which also enables downsizing of the entire apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view of a copying machine showing an embodiment of the present invention.

FIG. 2 is a sectional view of a copying machine showing one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a paper feed cassette.

FIG. 4 is an explanatory diagram showing a connection state of a copying machine main body and a paper feed cassette.

5 is an enlarged view of a V circle in FIG. 2. FIG.

FIG. 6 is a perspective view of a usage state.

FIG. 7 is an explanatory view showing another embodiment of the paper separating means.

FIG. 8 is a conventional explanatory diagram.

[Explanation of symbols]

 1 ... Copier main body 7 ... Paper feed cassette 7a ... Paper tray 7d ... Paper passage 8 ... Paper 10 ... Paper feed roll 11 ... Drive source

Claims (1)

[Claims] 1. A first paper feed cassette 7 for accommodating a sheet and provided in a lower stage with respect to the apparatus main body, and a paper 8 accommodated in the first paper feed cassette 7 are sent out toward the apparatus main body. The first paper feed roll 10 that rotates in such a manner, the second paper feed cassette 7 that accommodates the paper 8 and is provided below the first paper feed cassette 7, and the second paper feed A sheet feeding device having a second sheet feeding roll 10 which rotates so as to send out the sheet 8 accommodated in the cassette 7 toward the apparatus main body, wherein the first sheet feeding cassette 7 includes the sheet 8 A slit-shaped paper passage 7d is formed on the delivery side of the sheet, and the paper 8 delivered from the second paper feed cassette 7 by the second paper feed roll 10 is conveyed to the apparatus main body through the paper passage 7d. A paper feeding device characterized in that