JPH0253340B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper feeding device for a copying machine, and in particular,
The present invention relates to an improvement of a paper feeding device equipped with a plurality of paper feeding cassettes.

[Prior art]

Conventionally, this type of paper feeding device, as shown in FIG.
A paper guide section 3 is formed in front of the paper feed cassettes 2a, 2c.
Copy paper fed out from b or 2c by a feed roll 4 is conveyed to a conveyance roll 6 located near a photosensitive drum 5, and the copy paper is supplied to the photosensitive drum 5 by this conveyance roll 6. Note that the reference numeral 7 is an intermediate conveyance roll provided in the paper guide section 3.

However, in such a conventional paper feeding device, the paper guide section 3 is connected to each paper feeding cassette 2.
It is formed of a guide plate 3a provided in front of each of the cassette holders a, 2b, and 2c, and a guide plate 3b provided with a predetermined gap maintained from each of these guide plates 3a. Therefore, in order to configure this paper guide section 3, a guide plate 3a is installed in front of each cassette holder according to the number of paper feed cassettes 2a, 2b, 2c.
, a large number of guide plates 3a are required, and the number of parts increases significantly.
A space is required to incorporate these guide plates 3a, which causes an increase in costs, and there is a problem in that the machine body 1 becomes unnecessarily large.

Additionally, if a paper jam occurs in the paper guide section 3, the guide plate 3a on the cassette holder side becomes an obstacle, and it is not possible to find the jammed copy paper by simply removing the paper feed cassettes 2a, 2b, and 2c. Zuraku,
Also, this copy paper cannot be removed,
A door portion 3c that can be opened and closed is formed on the guide plate 3b side, and the door portion 3c must be opened inside the machine body 1 to discover and remove the jammed copy paper. It was extremely troublesome.

[Purpose of the invention]

Therefore, the present invention simplifies the configuration of the paper guide section in a paper feeding device, reduces the number of parts, reduces the space occupied within the machine body, downsizes the machine body, and prevents paper jams. The object of the present invention is to provide a paper feed device for a copying machine that can easily find and remove the copy paper causing the problem even if it occurs.

[Structure of the invention]

That is, the present invention provides a front edge of a casing constituting a paper feed cassette or a cassette holder on the machine body side of a copying machine to which this paper feed cassette is attached, and a front surface that faces forward and upward. The inclined front surface of the upper casing and the inclined upper surface of the lower casing form a guide path for copy paper fed from the lower casing, and this guide path allows each sheet to be fed. This is a paper feeding device for a copying machine that guides copy paper fed from a cassette, thereby substituting the function of a guide plate that is provided in front of each cassette holder and constitutes a paper guide section. .

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention will be specifically explained based on the Example shown in an accompanying drawing.

2 to 4, a paper feeding device according to an embodiment of the present invention is shown. This paper feeding device is configured such that a plurality of paper feeding cassettes 2a, 2b, and 2c can be mounted on a plurality of cassette holders (not shown) provided in the main body 1 of the copying machine.

Each of the paper feed cassettes 2a, 2b, and 2c has a casing 2 composed of a bottom portion 8, a front edge portion 9 standing on the periphery of the bottom portion 8, left and right side edges 10, and a rear edge portion (not shown). Further, a push-up plate 12 is provided on the bottom portion 8 for pushing up the copy paper 11 housed in the casing 2 to its paper feeding position.
is provided.

Each paper feed cassette 2a, 2b, 2c has a front edge 9 of its casing 2 having an inclined front surface 9a that slopes forward and upward, and an inclined upper surface 9b that slopes forward and upward. The inclined front surface 9a formed on the upper casing 2 when attached to the upper casing 2
and the inclined upper surface 9b formed on the lower casing 2 form a guide path for the copy paper 11 fed from the lower casing 2 side, and a guide path for the copy paper 11 fed from the lower casing 2 side is formed, and a guide path is formed in front of the guide path and the paper feed cassettes 2a, 2b, 2c. Each paper feed cassette 2a, 2 is
It constitutes a paper guide section 3 for the copy paper 11 fed by the feed roll 4 from b and 2c.

In this embodiment, each paper feed cassette 2a, 2
As shown in FIGS. 3 and 4, the front edge 9 of the casing 2 of b and 2c has a substantially doglegged inclined front surface 9a, and a panel having this inclined front surface 9a and an inclined upper surface 9b A substantially rhombus-shaped rib 13 is provided at the corner formed by the panel having a panel, which reinforces the front edge 9 of the casing 2 and aligns the front edge of the copy paper 11 housed in the casing 2. It's becoming like that.

Therefore, according to the paper feeding device of this embodiment, the copy paper 11 fed out by the feed roll 4 from a certain paper feeding cassette, for example, the paper feeding cassette 2c.
is a guide path formed by the inclined front surface 9a of the front edge 9 formed on the casing 2 of the paper feed cassette 2b located directly above it and the inclined upper surface 9b of the front edge 9 formed on the casing 2 of the paper feed cassette 2c. The paper is guided by a paper guide portion 3 formed by a guide plate 3b located in front of each paper feed cassette 2a, 2b, 2c, and is transported to a transport roll 5 provided near the photosensitive drum 6. 5 to the photosensitive drum 6.

Next, FIG. 5 shows that, unlike the above-mentioned embodiment, the present invention is applied to the cassette holders 14a, 14b, 14c of the machine main body 1 to which the paper feed cassettes 2a, 2b, 2c are mounted. , its casing 14
The front edge portion 15 of is formed with an inclined front surface 15a and an inclined upper surface 15b, as in the above embodiment.
The paper feed cassette 2b or 2 is attached to the lower casing 14 by the inclined front surface 15a of the upper casing 14 and the inclined upper surface of the lower casing 14.
A guide path is formed to guide the copy paper fed out from the photosensitive drum 6, and this guide path and the guide plate 3b located in front of each cassette holder 14a, 14b, 14c move the copy paper near the photosensitive drum 6. A paper guide section 3 is configured to guide the paper to the transport roll 5 located at.

[Effects of the Invention] As described above, in the paper feeding device of the present invention, the front edge of the casing of the paper feeding cassette or the cassette holder itself has an inclined front surface facing forward and upward and an inclined upper surface facing forward and upward. The inclined front surface of the upper casing and the inclined upper surface of the lower casing form a guide path for the copy paper fed from the lower casing side, so that the copy paper is guided from the paper feed cassette to the vicinity of the photosensitive drum. The configuration of the paper guide section that guides the paper to the transport rolls of the machine is extremely simplified, the number of guide plates that make up this paper guide section can be reduced, and the space occupied inside the machine body can be significantly reduced. This makes it possible to downsize the machine body, and in the past, when the distance from the feed roll located above each paper feed cassette to the transport roll near the photosensitive drum was long, an intermediate transport roll was installed in the middle. However, this intermediate conveyance roll can also be omitted.

In addition, even if a paper jam occurs in this paper guide section, the copy paper that caused the paper jam can be found by simply pulling out the paper feed cassette.
Can be removed.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a paper feeding device of a conventional copying machine, Fig. 2 is an explanatory diagram showing a paper feeding device according to an embodiment of the present invention, and Fig. 3 is an enlarged view of the main part of Fig. 2. FIG. 4 is a partially enlarged perspective view showing essential parts of the paper feed cassette shown in FIG. 3, and FIG. 5 is an explanatory view similar to FIG. 2 showing another embodiment. DESCRIPTION OF SYMBOLS 1... Machine main body, 2a, 2b, 2c... Paper feed cassette, 2... Casing, 9... Front edge, 9a... Inclined front surface, 9b... Inclined upper surface, 11... Copy paper.

Claims (1)

[Claims] 1. In a paper feeding device of a copying machine, in which a plurality of paper feeding cassettes containing copy paper are installed in the main body of the copying machine, and copying paper is fed from any one of these paper feeding cassettes toward a photosensitive drum. , the front edge of the casing constituting the paper feed cassette or the cassette holder on the machine main body side in which the paper feed cassette is installed is formed with an inclined front face facing forward and upward and an inclined upper face facing forward and upward. A paper feeding device for a copying machine, characterized in that a guide path for copy paper fed from a lower casing is formed by an inclined front surface formed on an upper casing and an inclined upper surface formed on a lower casing.