JPS6136523Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper ejection device used in a recording apparatus such as an electrophotographic copying machine.

As is well known, recording paper on which an image has been formed using an electrophotographic copying machine is ejected with the image facing upward, so if the recording paper is received on the paper ejection tray in the order in which it is ejected, the following recording paper will be Place it on the preceding recording paper with the image side facing up.

Therefore, when copying a document spanning multiple pages, there is the inconvenience of having to re-align the pages of the recording paper.

For this reason, conventional techniques have been used such as inverting the recording paper that is ejected from the paper ejection port so that the image side faces downward, and then stacking it on the paper ejection tray.
In order to reverse the recording paper, the paper ejection device becomes larger,
Some discrepancies occur in the stacking order, and the page alignment must be redone.

In view of the actual situation of conventional paper ejecting devices as described above, the present invention proposes a compact paper ejecting device that automatically aligns the pages of ejected recording paper and eliminates errors in page alignment. be.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall cross-sectional view of a paper ejecting device according to the present invention, in which a descending oblique paper ejecting tray 1 is provided at a paper ejecting port a of an electrophotographic copying machine A shown by a phantom line. 1 receives the recording paper X discharged by the discharge roller 2 of the electrophotographic copying machine A. In the middle of the paper ejection tray 1, a plurality of stoppers 3A, 3B, and 3C are located adjacent to each other in the length direction of the paper ejection tray 1, and are selectively protruded according to the size of the recording paper X to be ejected. be. These stops 3
A, 3B, and 3C are always kept in a retracted state by a spring 4, and when an electromagnetic solenoid 5 is energized, they protrude from the surface of the paper ejection tray 1 to receive the leading edge of the ejected recording paper X.

Further, at a position separated by the length L of the recording paper X from the stoppers 3A, 3B, and 3C, there is a cylindrical support member 6 that faces the paper ejection roller 2 and supports the rear end of the recording paper X. It is located. This support member 6
As shown enlarged in Fig. 2, there is recording paper X on the circumference of the
A radial through hole 7 is formed to allow passage of the
When the support member 6 is in the illustrated position, the rear end portion of the preceding recording paper X is supported by the peripheral wall portion 8 of the support member 6. Since the recording paper X discharged by the paper discharge roller 6 is discharged without contacting the paper discharge tray 1 and the preceding recording paper, the recording paper X discharged between the support member 6 and the paper discharge roller 2 is Air blowing ducts 9A and 9B are located on both sides of the air blowing duct 9A and 9B, and pressurized air is ejected from the injection holes 10 of these air blowing ducts 9A and 9B in the direction of the arrow.

The support member 6 is rotated intermittently by a drive motor M via a drive belt 11. To control this drive motor M, a micro switch MS ₁ is installed near the paper ejection roller 2 to detect the trailing edge of the recording paper X.
However, a micro switch MS ₂ is also provided to sense the cam protrusion 11 of the support member 6, and the output signals of these micro switches MS ₁ and MS ₂ are sent to the control circuit C of the drive motor M shown in FIG. is input.

Since the paper ejecting device according to the present invention has the above-described configuration, when the trailing edge of the recording paper is detected by the microswitch, the drive motor is activated and the support member is rotated in the direction of the arrow. Therefore, the rear end of the recording paper, which had been located in the through-hole of the support member, comes out of the through-hole while slidingly contacting the tip of the peripheral wall of the support member, as shown in the fourth figure. It is supported by the circumferential surface of the circumferential wall. In this case, the middle part of the preceding recording paper is sufficiently lifted off the surface of the paper output tray by the pressurized air blown from the nozzle holes, so the leading edge and middle part of the following recording paper are different from the preceding recording paper. Intervenes between the paper output trays.

When the support member rotates half a turn and the succeeding recording paper is completely ejected, the microswitch senses the cam protrusion on the support member, and this sensing signal causes the drive motor to stop, and the support member assumes the posture shown in the first figure. Wait for the recording paper to be ejected.

Note that in the case of recording paper that is stiff and has a small coefficient of friction, an air duct is not necessarily required.

As is clear from the above description, according to the present invention, subsequent recording sheets are ejected in order below the ejected recording paper with the image side facing upward, and the edges of the recording paper are The pages will be aligned automatically. Further, the paper ejecting device of the present invention can be manufactured in a small size, and a highly reliable device without page alignment errors can be provided.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view of the paper ejecting device according to the present invention.
FIG. 2 is an enlarged view of the main parts of the paper discharging device, FIG. 3 is a block diagram of the same paper discharging device, and FIG. 4 is an explanatory diagram of the operation of the same paper discharging device. a...Paper output slot, A...electrophotographic copying machine, X...
Recording paper, 1...Paper output tray, 3A, 3B, 3C...
...Stopper, 6...Support member, 7...Through hole.

Claims (1)

[Scope of utility model registration request] A stopper part for stopping the recording paper discharged from the paper discharge port of the recording device at its leading end is provided in the paper discharge tray part, and a through hole allows the discharged recording paper to pass through the entrance part of the paper discharge tray part. 1. A paper ejecting device that is rotatably provided with a support member formed with a hole, and configured to be able to operate to lift up the trailing end of a recording sheet after passing through a through hole.