JPS6014275Y2 - Paper ejection device in a copying machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a paper discharge device in a copying machine that uses copy paper of different sizes and stores the copy paper after copying has been completed.

In a copying machine that uses a plurality of copy papers of different sizes, a device like the one shown in Fig. 1 has been conventionally installed in order to eject the copy papers in an aligned state after copying has been completed at the paper ejection section. I am using it.

That is, a copy paper tray member 11 is disposed outside the main body 10 of the copying machine, and the copy paper tray member 11 has a size that is approximately the same as the largest copy paper among the copy papers used. A stopper 12 is formed which is slidable parallel to the direction.

When copying, the stopper 12 is moved according to the size of copy paper to be used.

For example, when using small copy paper such as A.4 size, move the stopper 12 to the position shown by the dotted line and
0 The distance from the outer wall to the stopper 12 is made almost the same as that of A-4 size.

Also, when using large copy paper such as B/4 size, move the stopper 12 to the position shown by the solid line and press the main body 1.
0 The distance from the outer wall to the stopper 12 is adjusted to B-4 size.

However, with this device, each time the size of the copy paper used changes, the stopper must be moved to match the size, which is troublesome, and the disadvantage is that the stopper is often forgotten to be moved, which disrupts the stacking order of the copy paper. be.

This idea was developed based on the above circumstances, and although it has a relatively simple structure, by simply attaching the paper feed cassette to the main body, the copy paper tray automatically moves the member itself, and the copy paper tray can be used to predict the end of copying. To provide a paper ejecting device for a copying machine that is easy to operate and can stack copy sheets in a uniform manner.

An embodiment of this invention will be described below with reference to FIGS. 2 to 4.

A copy paper tray member 22 is housed below a main body 20 of the copying machine that includes a built-in photosensitive drum 20.

This copy paper tray has a slit 23 approximately in the center of the member 22.
Guide pins 24 and 25 are formed and also serve as stoppers.
is inserted.

Also, 27 is the guide pin 24, 25 and the copy paper holder is member 2.
2, which is a support plate fixed within the main body 21 to support the
One end of a spring 30, which is a storage member, is locked to a first pin 28 formed on the lower surface thereof.

The other end of the spring 30 is latched to a second pin 31 formed on the lower surface of the copy paper holder 22, so that the copy paper holder 22 is always urged inward to the main body 21.

Furthermore, 32 is a paper feed cassette A that stores A.4 size copy paper 33, and 35 is a B.4 size copy paper 36.
The paper feed cassette B stores the paper feed cassette 35.
A protrusion 37 having a size equal to the difference 1 between the A-4 size and the B-4 size is formed at the tip.

Further, 38 is a paper feed roller, 39 is a transfer charger, 40 is a fixing device, and 41 is a paper discharge roller.

When no copying is being performed, the copy paper tray member 22 is urged inward by the spring 30 and is housed within the main body 21, as shown in FIG.

First, when copying using A-4 size copy paper 33, the paper feed cassette A32 is installed in the main body 21. The member 22 that is in contact with the copy paper tray is
When the paper feed cassette A32 is moved in the direction of the arrow X against the spring 30 and set in the main body 21 by a locking portion (not shown), the copy paper tray is moved to the member 22 as shown in FIG.
One end protrudes from the main body 21, which has a length approximately equivalent to A-4 size.

When copying is started in this state, the copy paper 33 is fed to the paper feed roller 38, the toner image on the photosensitive drum 20 is transferred by the transfer charger 39, and then the copy paper 33 is transferred to the fixing device 4.
0 and is copied by the paper ejection roller 41. -The paper receiver is member 2.
2 are deposited on top of each other.

Thereafter, when the paper feed cassette A32 is taken out from the main body 21 at the end of copying, the copy paper tray member 22 is moved by the spring 30 in the direction opposite to the arrow is stored in.

Next, when copying using B-4 size copy paper 36, attach paper cassette B35 to the main body, and
As in the case of size 4, the member 22 of the copy paper tray is moved in the direction of the arrow X to cause its tip to protrude from the main body 21.

However, the tip of the paper feed cassette B35 has a protrusion 3 with a length of 1.
7 is formed, the protruding amount of the member 22 of the copy paper tray is increased by one length compared to the paper feed cassette A32, as shown in Fig. 4, and is almost equivalent to the B.4 size. The size protrudes from the main body 21.

Then, when copying is started, the copy paper 36 is stacked on the member 22, with the copy paper tray protruding by the B.4 size, in the same process as when making one A.4 size copy.

Also, when the cassette B35 is taken out from the main body 21 after copying is completed, the copy paper holder 22 is moved to the main body 2 by the spring 30.
It is stored in 1.

According to this embodiment configured as described above, the copy paper tray always stores the member 22 inside the main body 21 when the copying machine is not in use, so it does not take up much space. Insert paper cassette B35 into main unit 2
1, the length of the copy paper tray corresponding to the size of copy paper to be used allows the member 22 to protrude outside the main body 21, so there is no need to adjust the member 22 again, making the copy paper tray easy to operate. becomes.

Note that this invention is not limited to the above-mentioned embodiments, and can be modified in various ways, such as the shape of the protrusion at the tip of the paper feed cassette, the mounting position of the spring, etc., and the size of the copy paper used.

As mentioned above, according to this invention, by simply attaching the paper feed cassette to the main body, the copy paper holder automatically protrudes its members from the main body according to the size of the copy paper stored in the paper feed cassette. Therefore, even when copying paper of several different sizes is used, the trouble of moving the stopper as in the conventional case is omitted, and operability is improved.

Furthermore, it is possible to prevent the disturbance of the stacking order of copy paper, which conventionally occurs due to forgetting to move the stopper.

Furthermore, since the copy paper tray is normally stored inside the main body, it is possible to make the copying machine for military use more compact.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing a conventional device, Figs. 2 to 4 show an example of this invention, and Fig. 2 is a sectional view showing the state in which the copy paper tray is housed in the main body. , Fig. 3 is a sectional view showing the paper feed cassette that stores A/4 size copy paper attached to the main body, and Fig. 4 is its B-
FIG. 3 is a sectional view showing a state in which a paper feed cassette for storing four sizes of copy paper is attached to the main body. 21...Main body, 22...Copy paper tray is a member, 23...Slit, 24.25...
・・Guide pin, 27・・・Support plate, 30・・Curved spring, 32・・・Paper feed cassette A135・・・・
...Paper feed cassette B137...Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A copy paper holder which is always urged to be stored in the main body by the storage member and is slidably provided so as to project outside the main body, is configured to store the member and the copy paper. and a paper feed cassette that slides in conjunction with a member so that the copy paper holder protrudes outward from the main body against the bias of the storage member when attached to the main body. A paper ejection device in a copying machine. 2 The length of the paper feed cassette inside the main body when installed is adjusted according to the size of the copy paper to be stored, and the amount of protrusion of the member of the copy paper holder to the outside of the main body is approximately equal to the size of the copy paper. 2. A paper ejecting device for a copying machine according to claim 1, wherein the paper ejecting device is adjusted so that 3. A paper ejecting device for a copying machine according to claim 2, wherein the paper feed cassette has a protrusion at the tip as necessary for length adjustment within the main body.