JPS5820862B2 - Manual paper feed cassette for electrophotographic copying machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copy paper supply cassette that is used with one electrophotographic copying machine installed, and a manual paper feeding cassette that is used for copying onto special paper. I am concerned.

An electrophotographic copying machine can make one copy of a document on so-called plain paper, and can also make one copy on special paper such as offset master, transparent film, second base paper, and thick paper.

In the former case, paper feed cassettes with different dimensions are prepared for each paper size, and multiple sheets of plain paper are stacked on top of each other in this cassette, and then placed in a predetermined position in the copying machine. However, the latter one did not use such a cassette system.

This is because even though it is called special paper, its contents are 1 as mentioned above.
There are many different types, and it is difficult to provide a paper feeding mechanism that satisfies all of them.

In particular, it is difficult to realize a mechanism that feeds cardboard one sheet at a time.

In addition to this mechanical problem, the material of the special paper may generate static electricity, making it difficult to feed the paper.

Even if there is a type of copying machine that uses a paper feed cassette for plain paper, due to the paper size etc., instead of using the copy paper in the paper feed cassette, you can manually insert separate copy papers one by one from the outside. A method is adopted in which copying is performed using a lever.

If you try to copy special paper using this manual insertion method,
For example, in the case of thick paper, the paper cannot move forward because it gets caught in the paper separation claw of the paper feed cassette that is installed in the copying machine.

In addition, in a copying machine employing this manual insertion method, there is usually a drive mechanism for feeding manually inserted paper, which is separate from the drive mechanism for feeding paper in the paper feed cassette.

The present invention is a special paper manual feeder that makes it possible to feed and copy special paper one sheet at a time by using the drive mechanism of a plain paper feed cassette as is. It provides cassettes.

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

FIG. 1 is a partially exploded perspective view of a special paper manual feed cassette according to the present invention. The hanging pieces 31 and 32 formed at the side edges of the side walls 21a and 21c of the cassette main body 2 are secured to the support shaft 22 at approximately the center of the side walls 21a and 21c. It is arranged so that it can swing once around 22.

Slightly behind the receiving plate support shaft 22 (to the right in Figure I), a cam shaft 23 parallel to the support shaft 22 is attached to the side walls 21a, 2 of the main body 2.
It is strung for 1 c.

The camshaft 23 is rotatable relative to the side walls 21a and 21cf, and a paper receiving plate pushing cam 24 is fixedly provided approximately in the center of the camshaft 23, which is shaped like an oval and has a notch 24a. Also, a set lever 25 is fixedly installed at one end.

A pedestal 26 having a height equal to the height of the side walls 21a and 21c is formed on the rear side of the main body 2, and forms the same plane as the paper receiving plate 3 when the paper receiving plate 3 is in a horizontal position.

A pin 2γ is implanted near and slightly forward of the support shaft 22 at the center of the main body bottom plate 21d.

The function of this pin 2γ will be explained in connection with the explanation of the operation of the cassette, which will be described later.

Further, an opening 211 is formed at a position substantially directly below the cam 24 on the bottom plate 21d of the main body, which cooperates with the notch 24a of the cam to stop the rotation of the cam.

An opening 28 is formed in the front center of the cassette body 2, into which a cassette detachment prevention mechanism provided in the copying machine body 1 is inserted.

A cutout window 29 is formed in the center of the front wall 21b of the cassette body 2 with the same width as the opening 28, and a pressure lever provided in the copying machine body is inserted through this window 29 when the cassette is installed.

The front and rear lower surfaces 1 of the bottom plate 21d of the cassette body 2 are provided with ribs 30 as shown in FIGS.
a, 30b.

30c 30d extends one inch in the width direction of the cassette to form a has been done.

An opening 33 is formed in the center of the front part of the paper receiving plate 3.
The rear end is bent downward once.

Further, a group of straight lines 34 indicating various paper sizes are drawn near one side edge of the receiving plate 3 in parallel with the side edge, and a pair of throwers (35a, 35a'; 35) are drawn along some of the straight lines.
b, 35b' are formed.

These lines are used as a reference when placing special paper of various paper sizes, and these slots prevent the paper from shifting in the width direction of the receiving plate when special paper is placed on the receiving plate 3. A prevention plate (not shown) is formed with a pair of corresponding protrusions for engagement.

Referring to Figures 2 and 3, the copying machine main body 4
A paper feed cassette insertion port 41 is provided at a predetermined position, and a cassette guide plate 42 extends horizontally into the main body at the bottom of a cassette passage formed inside the insertion port 41.

The leading end of the guide plate 42 rises upward, and this rising piece 42a functions as a cassette entry stopper.

A paper feed roller 43 is provided above near the front of the cassette path, and a microswitch MSI for detecting the presence or absence of paper is provided one step closer to the rear of this roller 43.

The operating arm m1 of the microswitch SMI is activated when the cassette is inserted into the cassette passageway.
One position is provided at the front of the opening 33 which can be inserted into the opening 33 formed therein.

Furthermore, another microswitch MS2 is provided in association with the paper feed roller 43.
1 paper feed roller 43 between 3 and microswitch MS1
A driving motor M is provided.

A paper guide device 44 is provided at the front of the cassette path.
A conveyance roller 45 is provided ahead of it.

These paper guiding and transport mechanisms are well known and will not be described in further detail.

A cassette detachment prevention mechanism 46 is provided at the front lower part of the cassette passage, and a lock release mechanism 41 which is operated in connection with the copying operation is provided at the center lower part of the cassette passage.

In addition, the front part of the cassette passage is connected to the paper receiving plate 3 of the cassette.
A crimping lever 48 is provided for engaging the front end of the support plate 3 and pushing the front part of the receiving plate 3 upward.

A spring 49 is provided between the pressure lever 48 and the cassette detachment prevention mechanism 46, and bias is applied between the two.

The cassette detachment prevention mechanism 46 and the lock release mechanism 4T are connected to an opening 42a formed at the front of the cassette guide plate 42.
42b to perform the intended function.

The cassette detachment prevention mechanism 46, the lock release mechanism 41.
For details of the structure and operation of the crimp lever 48, please refer to Japanese Patent Application No. 157497/1983 filed by the same applicant.

Now, 1. Invention 1. To explain how to use this paper feed cassette in relation to a copying machine, before copying onto special paper, slide the paper feed cassette 1 from the insertion port 41 of the copying machine main body 4 on the guide plate 42. The lower end of the front wall 21b is connected to the guide plate 4.
Insert the two front end rising pieces 42al until they collide.

When the cassette 1 is set in the predetermined position, the crimp lever 48 is inserted into the inside of the cassette body 2 through the window 29 provided on the front wall 21b of the cassette body 2.
A part of the cassette detachment prevention mechanism 46 is inserted into the opening 28 provided in the front part of the bottom plate 21d of the cassette body 2, thereby establishing a cassette detachment prevention state.

At this time, the operating arm m1 of the microswitch SM1 passes through the opening 33 of the receiving plate 3 and assumes the position shown in FIG. It is said to be a state.

Next, the set lever 25 of the cassette is rotated counterclockwise until the outer peripheral notch 24a of the fogging cam is stopped at the periphery of the opening 211 formed in the bottom 21 of the cassette body.

As a result, the front of the paper receiving plate 3 of the cassette 1 is tilted as shown in FIG. 3 against the pressure lever 48 which acts to push the front end upward.

At this time, the lower surface of the paper receiving plate 3 rests exactly on the top of the pin 2γ, preventing the paper receiving plate 3 from tilting further, and this inclined state is stably maintained.

In this state, insert one sheet of special paper P along the surface of the paper receiving plate 3 through the insertion opening 41 of the copying machine main body, and push it in until its tip abuts against the front wall 21b of the cassette main body 2.

In this state, when the set lever 25 of the cassette is rotated one turn clockwise, the front end of the one-sheet receiving plate 3 is pushed up by the pressing lever 481 and becomes horizontal, so that the upper surface of the sheet P is brought into pressure contact with the paper feeding roller 43.

At this time, the operating arm m1 of the microswitch MSI is the paper Pt.
Since it is pushed up from this point and assumes the position shown in FIG. 2, the presence of paper is detected and the copying machine becomes ready for copying operations.

In this state 1, when the copy operation button of the copying machine is pressed, the motor M starts in synchronization with the copy operation 1 and the paper feed roller 4
3 is rotated one turn clockwise.

As a result, the paper P is sent out one step forward, guided by the paper guide device 441, and transported to the transfer position by the transport roller 45.

When the rear end of the paper P leaves the cassette 1, the actuating arm m1 of the microswitch MS1 closes the opening 3 of the paper receiving plate 3 of the cassette 1.
1 out of 3 is dropped, and the copying operation is not possible until the first paper is inserted into the cassette.

There are various sizes of special paper used, so cassette 1
When placing the paper on the paper receiving plate 3, it is only necessary to arrange the paper along a straight line corresponding to the paper size f from among the group of straight lines 34 drawn once on the receiving plate 3.

In this way, any size of special paper within the width of the cassette can be used.

In the first embodiment described above, it is of course possible to make modifications such as providing two cams 24 spaced apart by an appropriate distance, or providing two pins 21 along the cam shaft 23 spaced apart from each other by an appropriate distance. be.

- The paper feed cassette for manually feeding special paper, which is based on the present invention, uses a simple cam mechanism to swing the paper receiving plate, and can copy onto special paper by using the drive mechanism of a normal paper feed cassette. It makes it seem possible.

[Brief explanation of the drawing]

Fig. 1 of the accompanying drawings is a partially exploded perspective view of a manual feed cassette according to the present invention 1, and Fig. 2 is a partially sectional view showing the paper feed cassette according to the present invention with one copying machine installed, showing the state before paper is inserted. Operating state: FIG. 3 is a diagram similar to FIG. 2, and shows the operating state after paper has been inserted.・ 1...Paper cassette, 2...Cassette body. 21a, 21c...Side wall, 21c...
Front wall, 21d... bottom plate, 22... receiving plate support shaft, 23... cam shaft. 24...Cam, 24a...Notch,
25...Set lever, 27...Pin, 28, 33...Opening. 29...Notch window, 3...Paper receiving plate, 3
1.32... hanging, 34... straight line group,
4...Copier main body. 41...Cassette slot, 42...
Cassette guide plate, 43...Paper feed roller, 44.
...Paper guide device. 45...Transport roller, 46...Cassette detachment prevention mechanism, 47...Trick release mechanism, 48
・・・・・・－Crimp lever, 49・・・Spring, MS
I, MS2...Micro switch, P...
・Special paper.

Claims (1)

[Claims] 1. A cassette body, a paper receiving plate having a fulcrum at approximately the center when viewed from the side wall of the cassette body and capable of swinging vertically with respect to the moving direction of the paper to be transferred; A biasing means is provided on the upstream side of the fulcrum position and is operated from the outside of the cassette body so as to maintain the paper receiving plate in an inclined state. Manual paper feed cassette.