JPS5917431A - Paper feed cassette loading apparatus - Google Patents

Abstract

PURPOSE:To keep copy sheet out of contact with a paper feed roller by engaging a cam guide member by a cam member in the process of loading and unloading a paper feed cassette. CONSTITUTION:A paper feed roller 7 of a copier body and a cam guide member 11 are movably supported and interlocked with each other. In the process of loading and unloading a paper feed cassette, the cam guide member 11 is engaged by a cam member 1a mounted on the paper feed cassette so that copy paper in the paper feed cassette is kept out of contact with the paper feed roller 7, and at the completion of loading the paper feed cassette, the cassette is correctly positioned in a cassette holder of the copier body 1 and the copy paper in the paper feed cassette are brought into contact with the paper feed roller 7. Accordingly, in the described simple arrangement, at the time of loading and unloading the paper feed cassette, the copy paper can be kept out of contact with the paper feed roller 7, so as to accomplish the loading and positioning operations for the cassette satisfactorily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for installing a paper feed force center in a copying machine.

As a method of replacing copy paper (transfer paper, photosensitive paper) for a copying machine, copy paper of different sizes, paper qualities, etc. are stored in each paper feed cassette in advance, and the paper supply containing the required copy paper is stored in advance. The method of attaching a paper feed center to the paper feed cassette holder of a copying machine and feeding the copy paper into the machine using the paper feed roller of the copy machine itself is convenient for replacing copy paper and is widely adopted. .

One of the conditions for realizing the above-mentioned force center method is that the copy paper in the paper feed cassette and the paper feed roller of the copier main body are kept in a non-contact state when the paper feed force center is attached to and removed from the copying machine. There is a need.

In other words, in the case of contact, at least the highest copy paper in the paper feed roller is pressed by the paper feed roller and curled up due to the installation or removal operation of the paper feed cassette.
This may cause the inconvenience of the paper being wrinkled or being pulled out from within the paper feed center.

Therefore, conventionally, when removing the paper feed port installed in the copying machine main body, by operating a lever on the copying machine main body,
A suppressing arm movably supported on the copying machine body is pressed down against a spring to bring the copy paper from the paper feed cassette receiving plate into contact with a paper feed roller supported on the copying machine body,
There are methods that separate the paper feed roller from the copy paper, and a method that moves and holds the paper feed roller, which is movably supported on the copier body where it comes into contact with the copy paper on the paper feed cassette receiving plate, by moving it up. The above-mentioned trouble is avoided by separating the roller from the copy paper.

However, the composition of the biological parents is complicated and the costs are high. In addition, there was also the inconvenience of having to operate a lever when removing the paper feed center from the main body of the copying machine.

Furthermore, the paper feed cassette was not positioned accurately with respect to the cassette holder in the main body of the copying machine, causing problems such as copying paper being fed diagonally into the machine.

The present invention provides a paper feed force sensor 1 for copying machines that does not have the above-mentioned drawbacks.
- The purpose of this device is to provide a mounting device that movably supports and interlocks the paper feed roller and cam guide member of the main body of the copying machine. By engaging the cam guide member with the cam member provided at 1□, the copy paper in the paper feed tray is prevented from coming into contact with the paper feed roller, and when the paper feed tray 1- is installed, the copy paper is prevented from coming into contact with the paper feed roller. It is precisely positioned in the cassette holder of the main body of the machine, and the copy paper in the paper feeding force center comes into contact with the paper feeding roller.

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a perspective view of the main parts of an embodiment of the present invention in a state where the paper feed cassette is not installed, FIG. 2 is a side view of the main parts of the same embodiment while the paper feed cassette is being installed, and FIG. A side view of the main parts when the paper feed cassette is completely installed is shown. First, the structure will be explained. The paper feed force center includes a cassette main body 1, a copy paper receiving plate 2, a spring 3 for holding the copy paper receiving plate 2, and a separating claw 4 provided at the front corner of the copy paper receiving plate 2. The separating claw 4 is structured so that it rotates to a position where the paper feed roller 7 and the copy paper receiving plate 2 come into contact when the paper feed tray is completely attached to the cassette receiver 6 of the copying machine main body 5. The spring 3 is designed so that the copy paper 8 always contacts the paper feed roller 7 with a constant pressure in relation to the thickness and weight of the copy paper 8. 9,10
1 shows the registration rollers and copy paper guide plate of the copying machine main body 5.

In the embodiment of the present invention, the cassette body 1 is integrally molded with cam members 1& on both side walls thereof, and the copying machine body includes a cam guide roller 11 that is fitted to the cam portion 1a, and a cam guide roller 11 that is fitted to the cam portion 1a. A paper feed roller 7 is provided between the paper feed roller 7 and the registration roller 9. The cam guide roller 11 is rotatably mounted on a shaft 12, and the paper feed roller 7 is rotatably mounted on a shaft 13 via a one-sided clutch 14. The shaft 12 is supported by a second lever 16, and the shaft 13 is rotatably mounted on the second lever 16. 1iiJ
One end of the lever 15 is rotatably attached to a pin 17 fixed to the main body 5 of the copying machine, and is biased downwardly by a spring 18. The second shaft/<-16 is a driven shaft 1 whose one end is rotatably attached to the copying machine main body 5.
9, and is urged to move downward by a spring 20. Still, the other end of the first lever 15 is arranged so as to come into contact with the lower surface of the other end of the second lever 16. However, when installing the paper cassette,
The cam guide roller 11 is moved upward by being engaged with the cam member 1a provided in the paper feed cassette, and the second lever 16 is also moved upward. Raise the paper feed roller so that the copy paper 8 in the paper feed center does not come into contact with the paper feed roller 7,
After the paper feed force center is attached, the cam guide roller 11 is lowered by the cam member 1a, and as the first lever 15 is lowered, the paper feed roller 7 is lowered via the second lever 16, and the paper feed roller 7 is lowered into the paper feed cassette. When the paper feed roller 7 is brought into contact with the copy paper 8 of By the upward movement of the lever 15, the paper feed roller 7 is moved upward via the 217th bar 16, and the copy paper 8 in the paper feed cassette and the paper feed roller 7 are moved upward.
It operates in such a way that there is no contact between the two. Therefore, the paper feed cassette can be attached to and detached from the copying machine main body 5 without any problem. Furthermore, when the paper feed tray 1- is completely attached to the copying machine main body 5, the cam member 11L of the cassette main body 1 and the cam guide roller 11 engage with each other, and the tensile force of the spring 18 causes the cassette receiver 6 The cassette device can be positioned in the direction and downward of the cassette device.

As described above, the present invention has a simple configuration that can maintain the non-contact state between the copy paper and the paper feed roller when the paper feed cassette is installed and removed, and when the cassette installation is completed, the copy paper is fed. The paper rollers are brought into reliable contact with each other, and the cassette is well positioned with respect to the cassette receiver, and its effects are very impressive.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts of the case no. 1-mounted Ail in one embodiment of the present invention, Fig. 2 is a side view of the main parts in the middle of mounting the paper feeding power center of the same embodiment, and Fig. 3 is the main part of the same embodiment. FIG. 3 is a side view of main parts in a state where the paper feed cassette is completely installed. 1. Cassette body, 1a. Cam member, 4...
Copy paper separation claw, γ Paper feed roller, 8...Copy paper, 1
1... Guide roller, 15... 1st lever, 16... 2nd lever, 18... spring.

Claims (1)

[Claims] The paper feed mechanism includes a paper feed mechanism that removably attaches to the copying machine main body a paper feed power center which is provided with a copy paper separating claw at the tip of the paper feed side and cam members on both side surfaces near the tip of the paper feed side. The paper mechanism includes a cam guide member that engages with a cam member of the paper feed cassette, and a paper feed roller provided ahead of the cam guide member on the paper feed side. , each of which is rotatably supported vertically and is rotatably supported in a predetermined direction by an elastic member.
A part of the first lever is arranged so as to abut a part of the second lever, and when the paper feeding force center is installed, the lever engages with a cam member provided on the paper feeding force center. to move the cam guide member upward, and move the first lever upward to move the paper feed roller upward via the second lever to enable attachment of the paper feed force center, and After installation, the cam member is configured to move the cam guide portion downward and move the paper feed roller downward, so that the paper feed roller comes into contact with the copy paper in the paper feed cassette. A loading device for the paper feed cassette.