JPS6040335A - Paper feeding unit - Google Patents

Abstract

PURPOSE:To facilitate the supplementation and replacement of sheets of record paper by installing a stopper which regulates the rear end part of said sheets of record paper contained in a paper feeding unit, on its base part and making said base part movable along a longitudinally provided guide rail. CONSTITUTION:In a paper feeding device which can contain many sheets of record paper p, a stopper 43, which regulates the rear end part of the many sheets of record paper contained in the paper feeding unit, is provided at the lower part of an elevating table 41 on which the sheets of record paper are loaded. A stopper mounting base 48 on which said stopper 43 is installed is movable along a longitudinally provided guide rail 47A. As a result, the supplementation and replacement of sheets of record paper can be made easier, while any erroneous copying operation can be prevented since the size of the loaded sheets of record paper is automatically indicated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a paper feeding device for a copying machine, and particularly to a paper feeding device for a copying machine, which is fixed or removably provided to the copying machine in order to enhance the paper feeding capacity of the copying machine. This invention relates to improvements in paper feeding devices such as multi-sheet feeding units.

[Prior art]

Recently, proposals have been made for adapter type or fixed type multi-sheet feeding a-knits 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 classification unit 1. As shown in FIG. The copying machine 2 is equipped with two paper feed trays 3A and 3B, into which recording paper presses 4A and 4B are installed, respectively, and the internal recording paper P is delivered to a single sheet as necessary. After the image is transferred and fixed, it is discharged onto the paper discharge tray 5. The multi-sheet feeding unit 1 is provided to enhance this paper feeding, and contains a larger number of recording sheets P than the cassette, and selectively carries out the recording MP for one sheet in addition to the cassette. Ru. The discharged 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, it is separated from the photoreceptor drum 7 and transferred to the fixing device 8. The toner image is fixed and discharged onto the disposal tray 5. By additionally providing the multi-sheet feeding unit 1, the copying machine 2 can continuously make copies of a large number of 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, and the rear end of the recording paper P is is regulated by the rear end stopper 13. The recording sheets P, which are thus pressed and regulated in the width direction and front-rear direction, are carried out one sheet at a time from the top surface of the stack. As a means for carrying out the recording paper, for example, the recording paper is sent out by a feeding roller 14 and a feeding belt 15, which are known carrying means, and is separated into one sheet by being squeezed by a double feeding prevention roller 16, and then carried out by rotation. The paper is fed to the paper feed path 6 by rollers 9 . As the recording paper P is consumed in this manner, the elevator table 11 moves upward in parallel, and is always maintained in a state in which the uppermost recording paper P can be carried out.

11c) When replenishing recording paper P or replacing recording paper PK of a different size, cover 21 in FIG.
After the lid is closed and the trailing end stopper 13 is retracted, the desired recording paper P is loaded and the trailing end stopper 13 is mounted and set again according to the size of the recording paper P.

However, with the conventional rear end stopper type, the above-mentioned operation is extremely difficult, especially in the compact and narrow multi-piece marine vessel unit 1.

[Purpose of the invention]

The present invention makes it possible to replenish or replace recording paper in a multi-sheet feeding unit without removing a stopper that regulates the rear end of the recording paper from the unit, and also to make it possible to supply or replace recording papers of different sizes 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.

[Melting of invention]

The present invention is constructed by rotatably attaching a stopper mounting base for movably holding a stopper that regulates the rear end of a recording sheet to a sliding member that is movable along a guide rail. In a paper feeding device capable of storing a large number of sheets of recording paper, a stopper for regulating the rear end of the large number of recording papers stored in the paper feeding device is provided at the bottom of a lifting table on which the recording paper is placed, and the stopper is attached. This is achieved by a boat loading equipment characterized in that the stopper is attached to the base and the stopper mounting base is moved along a guide rail KG provided in the front and back direction.

〔Example〕

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

FIG. 2 is a side cross section showing the configuration of the multi-sheet feeding unit 31;
FIG. 3 is a dramatic view of the main part showing the function of the rear end surface stopper 43 according to the present invention, and FIG. 4 is a sectional view of the main part in the direction of arrow A in FIG.

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

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, with small bent portions 43 at both ends.
A and 43B are firmly fitted into the mounting base rug to maintain an upright state as shown in the figure, and the rear end stopper 43, which stands upright in a click shape by applying a little pressure, uses the small bent portions 43A and 43B as fulcrums. variable movement direction i.e. second
In the figure, it can also be tilted horizontally in the left and right directions.

Furthermore, since the stopper mounting base 48 is pivotally attached to a sliding member 49 that is movable along the guide rail 47AK that is straddled by the guide plate 47, the rear end stopper 43 also moves along the guide rail 47AK. In addition to being movable, it can also rotate at right angles to the variable movement direction, that is, clockwise in FIG. 3, using the pivot portion 49A with the sliding member 49 as a fulcrum.

Furthermore, as shown in FIG. 4, the stopper mounting base 48
The protrusion 48A on the bottom of the recording paper P fits into the guide hole 47B provided on the upper surface of the guide plate 47 corresponding to the paper size of each recording paper P to determine its stopping position.
The magnet (481) attached to A is located in the guide hole 47.
It is also possible to display the size of the recording paper P on the outside of the copying machine by operating a reed switch 50 provided at the bottom of the copying machine.

If the paper feeding device of the present invention configured as described above is used,
When replenishing the recording paper P, the rear end stopper 6 is tilted to the right in FIG. 2 to facilitate loading of the recording paper P.
Next, by gradually lifting the trailing edge stopper 43, the trailing edges of the recording sheets P can be aligned. In addition, when exchanging recording paper PK of a different size, the rear end stopper 43 is rotated slightly clockwise in FIG.
AK, and by fitting the protrusion 48A on the bottom of the mounting base 48 into the guide hole 47B of the guide plate 47, the trailing end stopper is automatically moved when the recording paper P of a predetermined size is moved. At the same time, the magnet (48B) of the protruding tape closes the reed switch mark in the guide hole 47B to display the size symbol of the corresponding recording paper P on the outside of the copying machine, and the operator It also has the effect of letting you know that you are busy.

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

〔Effect of the invention〕

The present invention makes it extremely easy to replenish and replace recording paper, and the size of loaded recording paper can be adjusted automatically.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a copying machine equipped with a multi-ship unit. 2 to 4 are sectional views and a perspective view of the 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 47 A.
...Guide rail 47 B...Guide hole
48... Stopper mounting base 48 A...
・Protrusion 48 B... Magnet 49...
・・Sliding member crime・・Reed switch agent
Yoshimi Kuwahara

Claims (4)

[Claims] (1) In a paper feeding device capable of storing a large number of sheets of recording paper, a stopper is provided at the bottom of an elevating platform on which the recording paper is placed to regulate the rear end of the large number of recording sheets stored in the paper feeding device. 2. A paper feeding device, characterized in that the stopper is attached to a stopper attachment base, and the stopper attachment base is moved along a guide rail provided in a forward and backward direction. (2) The paper feed according to claim 1, wherein the stopper mounting base has one end pivotally mounted to be movable along the guide rail, and the stopper is rotatable at right angles to the variable movement direction. Device. (3) The paper feeding device according to claim 2, wherein the stopper is rotatable in variable movement directions. (4) The paper feeding device according to any one of claims 1 to 3, further comprising a detection member for detecting a stop position of the stopper mounting base.