JPS60144247A - Paper feeding device - Google Patents

Abstract

PURPOSE:To enable one type of paper feeding cassette to feed sheets of paper of more than one type by providing more than one paper containing part, on the upper and lower stages, in a paper feeding cassette, while providing chaging parts, in which the end parts of the upper and lower paper containing part of the paper feeding cassette are positioned in place respectively, in a cassette charging part. CONSTITUTION:In a paper feeding cassette 2, an intermediate board 3 with an area nearly half the area of a bottom surface 2b is attached to a rear wall 2a, forming upper and lower paper containing parts 4, 5. And, paper placing boards 9, 11, which are energized upward by means of springs 8, 10 respectively, are provided in both of the containing parts 4, 5 respectively. On the other hand, a cassette guide 16, on the end of which a projection 16a for permitting the paper feeding cassette 2 to be charged in the first position, is formed in the cassette charging part 14 of a copying machine body 1. And, a second charging part 17, in which the paper feeding cassette 2 is charged in the second position, is formed under the cassette guide 16. Thereby, the paper feeding cassette 2 can be selectively charged in two positions of different types, enabling sheets of paper of two types to be fed by means of one type of paper feeding cassette 2.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a paper feeding device that is applied to a copying machine or the like and feeds paper by attaching a paper feeding power center to a cassette mounting portion.

<Prior Art> In a copying machine equipped with only a single cassette mounting section, a paper feed cassette for storing paper of a desired size must be mounted during copying, and it is complicated to replace the paper feed power center. In order to solve this problem, a configuration that allows multiple paper feed cassettes to be installed may be used. However, if a configuration is adopted in which a plurality of paper feed cassettes can be installed at the same time, an increase in size cannot be avoided, and the cost also increases. Therefore, conventionally, as disclosed in Japanese Patent Application Laid-Open No. 52-3434, paper feed cassettes for storing two types of paper of different sizes are installed in a single cassette mounting section, and when copying, one of the paper cassettes is used. A paper feeding device that allows you to select paper types has been proposed.

However, for example, when the paper feed device disclosed in the above-mentioned Japanese Patent Application Laid-open No. 52-3434 switches the paper feed from one paper to the other, one of the cassette trays slides and the paper feed roller shaft also moves. The paper feeding device of Yoyoi, which is designed to feed multiple types of paper with one paper feeding force, has a non-sealed mechanism for feeding paper in the paper feeding cassette and its mounting section. had the disadvantage of having a complicated structure.

<Purpose of the Invention> The present invention was made in view of the above-mentioned circumstances, and has substantially the same function as a paper feeding device in which multiple paper feeding power centers can be installed at the same time without complicating the paper feeding cassette or the main body of the device. The purpose of the present invention is to provide a paper feeding device having the following functions.

<Structure of the Invention> The present invention provides a paper feed force sensor 1 through which a plurality of paper storage sections each storing a plurality of types of paper of different sizes are installed in the upper and lower stages, and the force center mounting section , a mounting unit for fixing the cassette at a position where the tip of the lower paper storage section of the paper feed cassette faces the paper feed roller or at a position where the tip of the upper paper storage section faces the paper feed roller; is provided so that paper can be fed from each paper storage section depending on the position where the paper feed force center is fixed.

<Embodiment> Fig. 1 is a cross-sectional view of a paper feeding device of a copying machine according to an embodiment of the present invention, when the paper feeding power center is attached to the first cassette mounting section, and Fig. 2 is a sectional view of the second cassette I/mounting section. A cross-sectional view of the device when a paper feed cassette is attached to the section is shown.

In the paper feed cassette 2 mounted on the cassette mounting section 14 of the copying machine main body 1, a middle plate 3 having an area approximately half of the bottom surface 2b of the box is joined to the rear wall 2a of the container, which is box-shaped as a whole and has an open top. This forms upper and lower paper storage sections 4.5.

The front wall 2C to which the middle plate 3 is not joined is the entry side when the copying machine is mounted on the main body 1, and is formed to have a lower height than the rear wall 2a. The front wall 2C is provided with a first mounting positioning hole 2d for positioning the paper feed cassette 2 in a first cassette mounting portion, which will be described later. The lower paper storage section 4 stores paper 6 that is larger in size than the paper 7 stored in the upper paper storage section 5. First half of paper storage section 4 *lX<
When it is installed in the copying machine main body 1, the spring 8 provided on the tip side of the bottom surface 2b is used to push the bottom surface 2
A paper mounting plate 9 is provided which is biased upward with its rotation center approximately at the center of b. The paper placement plate 9 is for lifting the leading edge of the stored paper 6 to facilitate paper feeding. In the upper paper storage section 5, there is a paper loading plate that is urged upward by a spring 10 provided at the tip of the middle plate 3, with the joint point between the rear wall 2a and the middle plate 3 as the rotation center. 1
1 is provided. Like the paper mounting plate 9, this paper mounting plate 11 also lifts the leading end of the paper 7 to be stored to facilitate paper feeding. Furthermore, separating claws 12 and 13 are provided on the side edges of the leading ends of each of the paper mounting plates 9 and 11. The separation claws 12 and 13 are used to ensure that the sheets are separated one by one without feeding the sheets in duplicate during paper feeding.

The cassette mounting section 14 of the copying machine main body 1 is capable of mounting two types of paper feed power centers 2 as described above. A paper feed roller 15 having a substantially half-moon shape is provided inside the cassette mounting section 14 .

The reason why the paper feed roller 15 is formed in a half-moon shape is that when paper is not being fed, the half-moon-shaped cutout portion remains stationary so as to face downward, so that it does not come into contact with the paper when it is installed, so that the paper feed cassette 2 can be easily installed. At the same time, it is possible to feed paper by rotating the roller 15 once without changing its position. Furthermore, inside the cassette/)I mounting section 14, when the paper feeding cassette/nod 2 is mounted in the first position, the first one of the paper feeding cassettes
A cassette guide IG is formed in which a protrusion 16a that fits into the mounting positioning hole 2d is curved at its tip. The upper part 16b of the cassette kite 16 acts as a paper guide that guides the paper drawn out by the paper feed roller 15 upward. When the first mounting positioning hole 2d is fitted into the protrusion 16a of the cassette guide 16, the paper feed cassette 2 is fixed 16 at the first cassette 1-mounting section. A second mounting portion 17 is formed in the lower part of the cassette guide 16, into which approximately half of the tip end of the paper feeding force center 2 is inserted when the paper feeding cassette 2 is mounted in the second position. The second mounting portion 17 has a shape that holds the tip of the paper feed cassette 2 diagonally to the lower left in order to make the tip of the upper paper storage portion 5 of the paper feed cassette 2 face the paper feed roller 15. . That is, the front wall 2c is attached to the inner wall 17a of the second mounting portion 17, and the inclined wall portion 17b is attached to the inner wall 17a of the second mounting portion 17.
When the paper feed cassette 2 is installed so that approximately half of the bottom surface 2b is in close contact with the paper feed cassette 2, the paper feed roller 15 is located at the tip of the upper paper storage section 5 of the paper feed cassette 2, and the paper feed cassette 2
is now fixed at the second stent attachment part.

In the above configuration, as shown in FIG. 1, from the state where the paper feed cassette 2 is fixed in the first cassette mounting part and paper is being fed from the paper storage part 4, the paper feed cassette 2 is slightly removed and the protrusion 16a is inserted. If the paper feed cassette 2 is mounted so that the front wall 2c is in close contact with the inner wall 17a of the second mounting portion 17 as shown in FIG. The cassette 2 is placed in the second cassette mounting section, and paper can be fed from the upper paper storage section 5.

In addition, from the state where the paper feed cassette 2 is fixed in the second cassette mounting part and feeding paper as shown in FIG. The paper feed cassette 2 can be placed in place. In other words, switching the paper feed can be performed extremely easily.

In the above embodiment, two paper storage sections were provided in the upper and lower stages of the paper feeding power center, and two cassette mounting sections were provided in the paper feeding power center mounting section. The number of paper storage sections and the number of cassette mounting sections provided in the paper feed cassette mounting section can be further increased by reducing the number of paper sheets. Further, although this embodiment shows a paper feeding device for a copying machine, the present invention can be similarly implemented in a document feeding device such as a facsimile machine.

<Structure of the Invention> As described above, according to the present invention, a plurality of paper storage sections each storing a plurality of types of paper of different sizes are installed in the upper and lower stages of the paper feed cassette, and a paper feeder is installed in the cassette mounting section. a mounting unit for fixing the cassette at a position where the leading end of the lower paper storage unit faces the paper roller or at a position where the leading end of the upper paper storage unit faces the paper feeding roller; Because of this, it is possible to provide substantially the same function as a paper feeder that can simultaneously attach a plurality of paper feeders without making the paper feeder and the paper feeder have a complicated structure.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the paper feeding device of a copying machine which is an embodiment of the present invention, when the paper feed cassette/gutter is attached to the first cassette/gutter attachment part, and Fig. 2 is a sectional view of the paper feeding device of a copying machine according to an embodiment of the present invention. A cross-sectional view of the device with a paper skein and gutter attached is shown. l-copying machine body, 2-@paper sash/gutter, 4-lower paper storage section, 5-upper paper storage section, 6.7-paper, 8,1
0-spring, 14-cassette mounting section, 15-paper feed roller, 16-cassette loading guide, 17-second mounting section.

Claims (1)

[Claims] (1) In a paper feeding device that feeds paper by attaching a paper feeding power center to a cassette mounting portion, the paper feeding power center includes one or more paper storage portions each storing a plurality of types of paper of different sizes. are provided in the upper and lower stages, and the cassette mounting section is located at a position where the tip of the lower paper storage section of the paper feed force center is opposite to the paper feed roller, or the tip of the upper paper storage section is opposed to the paper feed roller. A paper feeding device comprising a mounting section for fixing a cassette at a position where the sections face each other.