JPH0316830Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a paper feed cassette mounting mechanism for mounting a paper feed cassette in a paper feed section of a copying machine or the like.

<Prior Art> A paper feed section of a copying machine or the like requires a mechanism for pushing up the paper in the attached paper feed cassette so that the paper feed roller can feed the paper.
For this reason, the paper feed section is provided with a lever-like push-up arm, and the point of action of this push-up arm pushes up the back surface of the paper placement plate on which paper is placed within the paper feed cassette. However, in conventional paper feed cassette mounting mechanisms such as copying machines, this push-up arm is always biased by a spring to push up the paper placement plate, so when removing the paper feed cassette, the push-up arm must first be pushed up using a lever, etc. I had to push down the push-up arm and then pull out the paper feed cassette. Therefore, with conventional copying machines, it is troublesome to attach and detach the paper feed cassette, and it also requires considerable force to operate levers, etc., which is a troublesome task, especially for female operators. .

<Purpose of the invention> This invention was developed in view of the above circumstances, and is designed so that when the paper cassette is pulled out, the spring returns and the point of action of the push-up arm descends. An object of the present invention is to provide a paper feed cassette mounting mechanism that facilitates the removal operation of the paper feed cassette.

<Structure and Effects of the Invention> The paper feed cassette mounting mechanism of this invention is provided with a push-up arm 1 on the main body side of the apparatus, and when the paper feed cassette 4 is mounted, the push-up arm 1 rotates to move the paper feed cassette 4 upward. Paper placement plate 1 of paper feed cassette 4
1, the push-up arm 1 is configured in a shape that normally hangs down in a non-pushing state due to its own weight, and when the paper feed cassette 4 is installed, the tip of the paper feed cassette 4 is A slide plate 2 that slides a certain distance in the mounting direction while coming into contact with the push-up arm 1 is provided, and a tension spring 3 is provided that is stretched between the slide plate 2 and the push-up arm 1, and the tension spring 3 is It is characterized in that it is connected so as to act on the push-up arm 1 as a biasing force in the push-up direction only when the slide plate 2 slides.

When the paper feed cassette mounting mechanism of this invention is constructed as described above, when the paper feed cassette is not mounted, the spring is in a free state and does not bias the force point of the push-up arm, so that the point of action also falls under its own weight. Next, when installing the paper feed cassette, when the paper feed cassette is pushed in, the slide plate is pushed and pulls one end of the spring, which also pulls the force point of the push-up arm at the other end, so the point of action rises and moves upward. Push up the paper loading plate of the paper cassette located at . Then, when the paper feed cassette is taken out, the slide plate returns with the paper feed cassette and the spring also returns to its free state, so the force point of the push-up arm is no longer pulled and the point of action is lowered. do. For this reason, the paper feed cassette
It can be pulled out as it is without getting caught at the point of action of this push-up arm. Therefore, with the paper feed cassette attachment mechanism of this invention, when taking out the paper feed cassette, it is possible to simply pull out the paper feed cassette without having to operate a heavy lever. This eliminates the troublesome work of attaching and detaching the paper feed cassette.

<Example> Hereinafter, a case will be described in which the paper feed cassette mounting mechanism of this invention is implemented in a paper feed section of a copying machine.

Fig. 1 is a schematic front view of a paper feed cassette mounting mechanism according to an embodiment of this invention before the paper feed cassette is installed, and Fig. 2 is a schematic front view of the same paper feed cassette mounting mechanism after the paper feed cassette is installed. It is a diagram.

The paper feed cassette mounting mechanism of this embodiment is comprised of a push-up arm 1, a slide plate 2, and a spring 3 provided in the paper feed section of a copying machine. The push-up arm 1 has a lever shape with one end pivoted to a fulcrum 5 below the attachment of the paper feed cassette 4 in the paper feed section of the copying machine, and the other end extends in the paper feed direction to form an action point 6. There is. The force point 7 of this push-up arm 1 is formed at a lever-shaped tip that projects downward from a fulcrum 5 at one end. The slide plate 2 is a plate having an L-shaped cross section, and is disposed on the paper feeding direction side of the push-up arm 1 with one piece standing upright upward, and is attached so as to be slidable back and forth in the paper feeding direction. The spring 3 has one end locked to the force point 7 of the push-up arm 1, and the other end locked to the tip of the other piece of the slide plate 2.

Note that the paper feed cassette 4 has a hole 9 in the center of the bottom plate of the box-shaped outer frame 8 into which the point of action 6 of the push-up arm 1 enters.
The paper 10 is stacked on a tray-shaped paper mounting plate 11 whose rear end is pivotally supported within the outer frame 8 and whose leading edge in the paper feeding direction swings up and down.

In the paper feed cassette mounting mechanism of this embodiment configured as described above, when the paper feed cassette 4 is not mounted, the slide plate 2 is in a predetermined position and the spring 3 is in a free state, as shown in FIG. Therefore, the point of force 7 of the push-up arm 1 is not pulled, and the point of action 6 is also in the same horizontal state as the fulcrum 5. Next, when the paper feed cassette 4 is installed, as shown in FIG. , the force point 7 of the push-up arm 1 is pulled by pulling the spring 3, so the point of action 6 rises;
Pass through the hole 9 of the paper feed cassette 4 and press the back side of the paper placement plate 11. Then, the leading edge of the paper stacking plate 11 in the paper feeding direction rises, and the leading edge of the paper 10 stacked on the paper stacking plate 11 is located below the paper feeding roller 12. As it rotates, it will be fed out one by one. When the paper feed cassette 4 is taken out, the slide plate 2 is also pulled back by the spring 3 as the paper feed cassette 4 is pulled out, so the spring 3 becomes free and the point of action 6 of the push-up arm 1 also falls under its own weight. . Therefore, when the paper feed cassette 4 is being pulled out, the point of action 6 of the push-up arm 1 does not get caught on the edge of the hole 9 of the paper feed cassette 4, thereby preventing the paper feed cassette 4 from being pulled out.

As explained above, in the paper feed cassette mounting mechanism of this embodiment, the action point 6 of the push-up arm 1 is biased by the spring 3 so as to push up the paper placement plate 11 only when the paper feed cassette 4 is mounted. Therefore, when installing the paper feed cassette 4, it is sufficient to push it in as it is, and when removing the paper feed cassette 4, it is sufficient to simply pull it out. For this reason,
When removing the paper feed cassette 4, there is no need to operate a heavy lever, so even a person with limited strength, such as a female operator, can easily attach and detach the paper feed cassette 4.

Next, a case will be described in which the paper feed cassette mounting mechanism of this invention is implemented in the paper feed section of another copying machine.

FIG. 3 is a perspective view of a paper feed cassette mounting mechanism which is another embodiment of this invention, FIG. 4 is a schematic plan view of the paper feed cassette mounting mechanism immediately before the paper feed cassette is mounted, and FIG. FIG. 2 is a schematic plan view after the paper feed cassette is installed in the same paper feed cassette installation mechanism.

The paper feed cassette mounting mechanism of this embodiment is such that the paper feed cassette 4 is mounted in the paper feed section of a copying machine in a direction transverse to the paper feeding direction. Immediately before installing the paper feed cassette 4, as shown in FIG. 4, the slide plate 2 is in a predetermined position and the spring 3 is
is in a free state, the force point 7 of the push-up arm 1 is not pulled, and the application point 6 does not rise. Next, when the paper feed cassette 4 is installed, as shown in FIG.
The inner surface of the upright piece of the slide plate 2 comes into contact with the side edge of the outer frame 8 of the paper feed cassette 4 and is pushed laterally.
Since the force point 7 of the push-up arm 1 is pulled by pulling the spring 3, the point of action 6 rises and pushes the back surface of the paper placement plate 11. Then, the leading edge of the paper mounting plate 11 in the paper feeding direction rises, and the leading edge of the paper 10 stacked on the paper mounting plate 11 is located below the paper feeding roller 12.
As the half-moon-shaped paper feeding roller 12 rotates, the paper is fed out one by one. When the paper feed cassette 4 is taken out, the slide plate 2 is also pulled back by the spring 3 as the paper feed cassette is pulled out, so the spring 3 becomes free and the point of action 6 of the push-up arm 1 also descends under its own weight. Therefore, when drawing out the paper feed cassette 4, the point of action 6 of the push-up arm 1 does not get caught on the paper feed cassette 4 and prevent the drawing out.

Therefore, even in the case of the paper feed cassette mounting mechanism of this embodiment, the point of action 6 of the push-up arm 1 pushes up the paper placement plate 11 only when the paper feed cassette 4 is mounted. When installing the paper feed cassette 4, it is sufficient to push it in as it is, and when removing the paper feed cassette 4, it is sufficient to pull it out as it is, and the same effect as in the case of the previous embodiment can be obtained.

In the example, the case where this invention was implemented in the paper feeding section of a copying machine was shown, but it can also be used in other machines that are equipped with a cassette loaded with sheet-like paper and feed paper one by one from there. Similar effects can be obtained no matter what type of product it is applied to.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a paper feed cassette mounting mechanism according to an embodiment of this invention before the paper feed cassette is installed, and Fig. 2 is a schematic front view of the same paper feed cassette mounting mechanism after the paper feed cassette is installed. 3 is a perspective view of a paper feed cassette mounting mechanism which is another embodiment of this invention, FIG. 4 is a schematic plan view of the paper feed cassette mounting mechanism immediately before the paper feed cassette is mounted, The figure is a schematic plan view after the paper feed cassette is installed in the same paper feed cassette installation mechanism. 1... Push-up arm, 2... Slide plate, 3...
Spring, 4...paper feed cassette, 5...fulcrum,
6...Point of action, 7...Point of force, 11...Paper placement plate.

Claims (1)

[Claims for Utility Model Registration] A push-up arm 1 is provided on the main body side of the device, and when a paper feed cassette 4 is attached, the push-up arm 1 rotates to lift the paper placement plate of the paper feed cassette 4. 11, the push-up arm 1 is configured in a shape that normally hangs down in a non-pushing state due to its own weight, and when the paper feed cassette 4 is installed, the tip of the paper feed cassette 4 is a slide plate 2 that slides a certain distance in the mounting direction while coming into contact with the push-up arm 1; and a tension spring 3 that is stretched between the slide plate 2 and the push-up arm 1. is the push-up arm 1 only when the slide plate 2 slides.
A paper feed cassette attaching/detaching mechanism, characterized in that the paper feed cassette attachment/detachment mechanism is connected so as to act as a biasing force in a pushing up direction.