JPH0339933B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device for a copying machine.
In particular, the present invention relates to an improvement in a paper feeding device such as a multi-sheet feeding unit that is fixed or removably provided in a copying machine in order to increase the paper feeding capacity of the copying machine.

[Conventional technology]

Recently, proposals have been made for adapter-type or fixed-type multi-sheet feeding units that can increase the copying capacity when making a large number of copies. That is, FIG. 1 shows a copying machine 2 having such an additional multi-sheet feeding unit 1. As shown in FIG. The copying machine 2 is equipped with two paper feed trays 3A and 3B, into which recording paper cassettes 4A and 4B are respectively loaded, and if necessary, the internal recording paper P is delivered to one sheet and transferred. - After fixing, the paper is ejected to the paper ejection tray 5. The multi-sheet feeding unit 1 is provided to enhance this paper feeding.
Built-in more recording paper P than the cassette,
The recording paper P for one sheet is selectively taken out from the cassette. The unloaded recording paper P passes through the paper feed path 6, contacts the photoreceptor drum 7 carrying the toner image in synchronization, and after the toner image is transferred, is separated from the photoreceptor drum 7 and transferred to the fixing device 8. As a result, the toner image is fixed and discharged onto the paper discharge tray 5.
By additionally providing the multi-sheet feeding unit 1, the copying machine 2 can continuously make copies of many sheets and sizes without replacing the cassette.

The recording paper P in the multi-sheet feeding unit 1 is placed on a plate-shaped lifting table 11, and both sides thereof are regulated by side guide plates 12 that regulate the width direction of the paper.
Further, the rear end of the recording paper P is regulated by a rear end stopper 13. The recording sheets P, which are regulated in the width direction and the front-rear direction in this manner, are carried out one sheet at a time from the topmost surface of the stack. As a means for conveying the recording paper, for example, the recording paper is conveyed out by a known conveyance means such as a feed roller 14 and a feed belt 15, separated into one sheet by being squeezed by a double-feed prevention roller 16, and then rotated. The paper is fed to the paper feed path 6 by a conveyance roller 9 that moves. In this way, as the recording paper P is consumed, the elevator table 11 moves upward in parallel, and is always maintained in a state where the uppermost recording paper P can be carried out.

In the multi-sheet feeding unit 1 having such a configuration, when replenishing the recording paper P or replacing it with a recording paper P of a different size, the cover 21 in FIG. 1 is opened and the rear end stopper 13 is moved. After retracting, the required recording paper P is loaded and the trailing end stopper 13 is moved again according to the size of the recording paper P.
are being installed and configured.

However, with the conventional rear end stopper type,
Particularly in the compact and narrow multi-sheet feeding unit 1, the above-mentioned operation is extremely difficult and difficult.

[Purpose of the invention]

The present invention makes it possible, in a multi-sheet feeding unit, to replenish or replace recording paper without removing a stopper that regulates the rear end of the recording paper from the unit, and to feed different kinds of paper by sliding the stopper. It is an object of the present invention to provide a simple paper feeding device that can be set at a position that regulates the rear end of recording paper of different sizes.

[Structure of the invention]

The present invention provides a paper feeding device capable of storing a large number of sheets of recording paper, in which a stopper for regulating the rear end of the recording paper is provided at the lower part of an elevating table on which the recording paper is placed, and a stopper mounting base to which the stopper is attached. The paper feeder is configured to move along a guide rail provided in the front-rear direction, and the stopper is configured to be rotatable in the moving direction with respect to the stopper mounting base. It will be achieved.

〔Example〕

One embodiment according to the present invention is shown in FIGS. 2-4.

FIG. 2 is a side cross section showing the structure of the multi-sheet feeding unit 31, and FIG. 3 is a rear end surface stopper 4 according to the present invention.
A perspective view of the main parts showing the functions of No. 3, and FIG.
FIG. 3 is a sectional view of a main part in the direction of arrow A in the figure.

The recording paper P placed on the lifting table 41 is regulated on both sides by side guide plates 42 that regulate the width of the paper, and further regulated in the length direction by a rear end stopper 43. It will be placed correctly in the predetermined position.

The rear end stopper 43 according to the present invention is formed by forming a bar with a circular cross section into a substantially U-shape, and the small bent parts 43A and 43B at both ends form the stopper mounting base 4
The rear end stopper 43 is fitted into the small bent portions 43A, 43 to maintain the upright state as shown in the figure, and is made to stand upright in a click shape by applying a little pressure.
It can also be tilted horizontally in the variable movement direction, that is, in the left and right directions in FIG. 2, using B as the fulcrum.

Further, the stopper mounting base 48 is attached to the guide plate 4.
7, the rear end stopper 43 is also movable along the guide rail 47A, and the slide member 49 is movable along the guide rail 47A. It is also possible to rotate at right angles to the variable movement direction, that is, clockwise in FIG.

Furthermore, as shown in FIG. 4, the protrusion 48A on the bottom of the stopper mounting base 48 fits into the guide hole 47B provided on the top surface of the guide plate 47 corresponding to the paper size of each recording paper P, and the stopper is stopped. In addition to determining the position, the magnet 48B attached to the protrusion 48A acts on the reed switch 50, which is a detection member provided at the bottom of the guide hole 47B, to display the size of the recording paper P on the outside of the copying machine. is also possible.

By using the paper feeding device of the present invention configured as described above, when replenishing the recording paper P, the trailing end stopper 43 can be tilted to the right in FIG. 2 to facilitate loading of the recording paper P. Then, by gradually lifting the rear end stopper 43, the rear ends of the recording sheets P can be aligned. In addition, when replacing the recording paper P with a different size, the rear end stopper 43 is rotated slightly clockwise in FIG.
7A, and insert the protrusion 48A on the bottom of the mounting base 48 into the guide hole 47B of the guide plate 47.
When the rear end stopper 43 is inserted into the
occupies a position that regulates the length direction of the recording paper P of a predetermined size, and at the same time, the magnet 48B of the protrusion 48A engages the reed switch 5 in the guide hole 47B.
0 is closed and the size symbol of the corresponding recording paper P is displayed on the outside of the copying machine to notify the operator.

Furthermore, by tilting the rear end stopper 43 to the left in FIG. 2 and making the upper surface of the lifting platform 41 flat, it is possible to load even large-sized recording paper that cannot be restricted by the rear end stopper 43. It becomes possible.

[Effects of the Invention] The present invention provides an extremely useful paper supply that makes it extremely easy to replenish and replace recording paper, and also automatically displays the size of the loaded recording paper, thereby preventing erroneous copying operations. The equipment will be provided.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a copying machine equipped with a multi-sheet feed unit. 2 to 4 are sectional views and perspective views of a multi-sheet feeding unit according to the present invention. 41... Lifting platform, 42... Side guide plate, 43...
...Rear end stopper, 43A, 43B...Small bending part,
47...Guide plate, 47A...Guide rail, 4
7B...Guide hole, 48...Stopper mounting base, 4
8A...Protrusion, 48B...Magnet, 49...
Sliding member, 50...Reed switch.

Claims (1)

[Scope of Claims] 1. In a paper feeding device capable of storing a large number of sheets of recording paper, a stopper 43 for regulating the rear end of the recording paper is provided at the lower part of an elevating table 41 on which the recording paper is placed, and the stopper 43 controls the rear end of the recording paper. The stopper mounting base 48 to which the stopper 43 is attached is configured to move along a guide rail 47A provided in the front-rear direction, and the stopper 43 is attached to the stopper mounting base 48.
A paper feeding device characterized in that it is configured to be able to rotate in a moving direction with respect to the paper feed device. 2 The stopper 43 is attached to the stopper mounting base 4
8. The paper feeding device according to claim 1, wherein the paper feeding device is rotatable in a direction perpendicular to the moving direction. 3. The paper feeding device according to claim 1, further comprising a detection member 50 for detecting the stop position of the stopper mounting base 48.