JPS61169426A - Deplex copying paper feed receiving tray for copying machine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a paper jam due to paper curling, by making a duplex copying paper feed receiving tray provide a rear end engaged member which has a rear end of the paper housed in this tray engaged at a lower level than a position where succeeding paper comes flying. CONSTITUTION:When paper (a), requiring the backside copying as single-side copying is over, is housed in feed receiving tray, a paper cover 7 attached to a paper cover 3 to be opened or closed according to housing timing by a link plate 4 interlocking with a link rotating at a time when the paper (a) leaps in on a paper housing plate 2 via a jump block 1, opens from the housing plate 2 whereby the paper (a) is housed on the housing plate 2. If so, a tension plate 7 is closed, holding the paper (a) down, and the rear end is engaged to a rear end engaged member 8 moving as a pendulum, making it become stationary at a position not to interfere with the incoming of the succeeding paper. With this motion repeated, the paper (a) is accumulatively housed. When backside copying is started, the paper (a) is carried out of a discharge passage 9 by a bottom roll 5 and a delivery roll 6 while being pressed by the paper cover 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a member for locking the trailing edge of the paper previously stored in the duplex copying paper feeding/receiving tray, thereby controlling the size and direction of the curl of the paper. To provide a double-sided copying paper sending/receiving tray for a copying machine which accommodates paper regardless of the type of copying and allows automatic double-sided copying to be performed smoothly.

[Conventional technology]

An example of a conventional double-sided copy paper feeding/receiving tray for a copying machine is shown in FIG. The double-sided copying paper feeding/receiving tray of this copying machine includes a jump base 1 that receives and receives paper a that has completed single-sided copying that jumps in, a paper storage plate 2 that stores the paper a that jumps in via the jump base 1, A paper presser 3 that presses down the paper a that has jumped into the storage plate 2
, a link plate 4 interlocked with a rotating link 4a to rotate the paper presser 3, and a paper a on the paper storage plate 2.
and a carry-out roll 6 which discharges and conveys the paper a conveyed by the bottom roll 5 to an image forming area via a discharge path 9.

In the above configuration, the paper presser 3 rotated by the link plate 4 interlocked with the rotating link 4a opens from the paper storage plate 2 in accordance with the timing of paper storage, and transfers the paper a, which has been single-sided copied, via the jump platform 1. paper storage plate 2
to be accommodated. When the paper a is stored, the paper presser 3 closes toward the paper storage plate 2 and presses the paper a. Next, when the back side copying operation begins, the bottom roll 5 and the carry-out roll 6 rotate to sequentially discharge and convey the sheets a one by one through the discharge path 9 to the image forming area.

[Problem that the invention seeks to solve]

However, according to the conventional double-sided copying paper feeding/receiving tray of a copying machine, the paper presser 3 is configured to press only the leading edge of the paper a, so if the paper is curled significantly, the paper stored earlier may be There was a risk of paper jams due to the subsequent paper colliding with the curl at the trailing edge, and there were restrictions on the types of paper that could be used.

[Means and effects for solving the problem] The present invention has been made in view of the above problems, and even if the paper is heavily curled, the paper stored in advance in the duplex copying paper sending/receiving tray is In order to accurately stack and accommodate subsequent sheets of paper in sequence without rear-end collision, a copying machine is provided with a member that locks the trailing edge of the sheets stored in the sending/receiving tray at a level lower than the position from which the following sheets fly. The present invention provides a double-sided copy paper sending/receiving tray.

〔Example〕

Hereinafter, a double-sided copying paper feeding/receiving tray of a copying machine according to the present invention will be described in detail. FIG. 1 shows one embodiment, and parts that are the same as those in FIG. 3 are indicated by the same reference numerals, so redundant explanation will be omitted. has a paper pressing plate 7 that lowers the position level of the paper a in order to lock the rear end of the paper a to a trailing end locking member 8, which will be described later. Locking members 8 that lock the rear end of the sheet a pressed onto the storage plate 2 by the presser plate 7 are fixed to the jump platform 1 so as to be at a lower level than the flight path of the sheet a. .

In the above configuration, for example, when storing a predetermined number of sheets a for which one-sided copying has been completed and back-side copying is required, one sheet of paper a passes through the jump table 1 and is placed on the paper storage plate 2. Link 4a rotates when jumping upwards
A paper presser plate 7 attached to the paper presser 3, which opens and closes depending on the storage timing by a link plate 4 interlocked with the paper storage plate 2, opens from the storage plate 2, and the paper a is stored on the storage plate '2. When the paper a is stored, the presser plate 7 is closed and the paper a is held down until the succeeding paper is stored (detected by a sensor), and the rear end is rotated freely. It is locked to the end locking member 8 and kept stationary at a position where it does not become an obstacle to the flying of subsequent paper. By repeating this operation one sheet at a time until all of the predetermined number of sheets a have been stored in the sending and receiving tray, subsequent sheets can be stacked accurately without colliding with the sheets a that were previously stored in the sending and receiving tray. It can be accommodated. Next, when the copying operation for the back side starts, the predetermined number of sheets Ja that have been accommodated are transferred one by one through the ejection path 9 by the rotation of the bottom roll 5 and the carry-out roll 6 while being pressed by the paper presser plate 7, and are again imaged. It is sequentially discharged and conveyed to the formation area.

As shown in FIG. 2(a), artificial grass 8a is attached to the rear end of the locking member 8, and the curled rear end of the paper a is secured by the grain of the artificial grass. For example, the rear end locking member 8 itself may have ratchet teeth 8b (FIG. 2(n)) or flat knurling 8c.
(Fig. 2 (c)) may be provided.

〔Effect of the invention〕

As explained above, according to the double-sided copying paper feeding/receiving tray of the copying machine of the present invention, since it is equipped with a member that locks the trailing edge of the paper stored in the feeding/receiving tray at a level lower than the position from which the succeeding paper flies, the above-mentioned Subsequent sheets of paper can be stacked and stored in sequence accurately without colliding with the sheets of paper that were previously stored in the sending/receiving tray.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, and FIG.
is an overall perspective view. Figure 1 (17) is a side view of Figure 1 (A) with a part of the incense stone omitted. Explanatory drawing which showed the example of a shape of a 2nd presser member. FIG. 3 is an explanatory diagram showing a double-sided copy paper sending/receiving tray of a conventional copying machine. Explanation of symbols 1...Jump base 2...Paper storage plate 3-----m-Paper presser 4----------
Link plate 4 a---Link 5-
...Bottom roll 6--Carry-out roll 7
---Paper holding plate 8...--Rear end locking member 9--
-----One discharge path a---m---Paper patent Applicant Agent: Fuji Xerox Co., Ltd.
Patent Attorney Shin Matsubara 2 Same as Seiji Muraki Same Same as Tadao Hirata Same Same as Atsushi Ueshima- Same Same as Lead powder Hitoshi Figure 1

Claims (1)

[Scope of Claims] In a double-sided copying paper receiving/receiving tray of a copying machine that receives paper that has been copied on one side and sends it out for copying on the other side, a paper presser that opens and closes the paper stored in the receiving/receiving tray to press it depending on the storage timing. and a paper locking member that is provided at a level lower than the paper flying path at the entrance of the sending/receiving tray and that locks the rear end of the paper pressed by the paper presser member. A double-sided copy paper feeding/receiving tray of a copying machine.