JPH062989Y2 - Automatic paper feed mechanism - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is to feed out paper sheets loaded in a hopper by rotating a paper feed roller, and separate the fed paper sheets one by one by a separating member. And an automatic paper feeding mechanism for feeding.

[Conventional technology]

FIG. 4 is a side view showing a conventional automatic sheet feeding mechanism. FIG. 5 is an enlarged perspective view of the guide plate shown in FIG.

In the figure, 1 is a paper feed roller, and this paper feed roller 1 is provided rotatably in a clockwise direction around a drive shaft 1a.

Reference numeral 2 denotes a gate block having an inclined surface on the front end side, and the front end of the gate block 2 is arranged to face the paper feed roller 1 with a predetermined gap.

With the gate block 2 as a bottom portion, a hopper 5 is constituted by a guide plate 3 on the side of the paper feed roller 1 and a pressing plate 4 facing the guide plate 3 and moving toward the side of the guide plate 3 to press the guide plate 3. As shown in FIG. 5, the guide plate 3 has a shape in which the upper and lower ends of a thin plate material are bent outward, and guides the paper sheets at the time of loading and feeding the paper sheets, which will be described later.

Reference numeral 6 denotes paper sheets such as banknotes, which are stacked in the hopper 5 and loaded in an upright state.

Reference numeral 7 is a pickup roller provided above the paper feed roller 1, and the pickup roller 7 is also provided so as to be rotatable clockwise around a drive shaft 7a.

8 is a pulley located below the gate block 2;
Is a pulley provided diagonally below the pulley 8. A brake rubber belt 10 is wound around the pulleys 8 and 9 and is brought into contact with the paper feed roller 1 via the brake rubber belt 10. It is arranged.

The operation will be described with the configuration described above.

First, the paper sheets 6 are placed upright on the gate block 2 from the direction of the arrow A and loaded in the hopper 5, and then the pressing plate 4 is pressed toward the guide plate 3 side by a drive source (not shown). When the group 6 is moved, the sheet 6 is pressed by the sheet feeding roller 1 and the pickup roller 7 provided on the guide plate 3 side.

Then, the paper feed roller 1 and the pickup roller 7
One of the paper sheets 6 pressed by is directly in contact with both rollers 1 and 7 and is fed downward by rotating the pickup roller 7 in the direction of arrow B.

At this time, the sheet 6 to be fed is only one sheet which is in direct contact with both rollers 1 and 7 as described above, but a plurality of sheets are fed due to various factors such as the pressing force of the pressing plate 4 or static electricity. It may be lost.

When the plurality of paper sheets 6 are fed out into a gap having a predetermined width between the paper feed roller 1 and the gate block 2, the paper feed roller 1 is rotated to further lower the brake rubber belt 1.
0 and the sheet feeding roller 1, and the sheet is separated by the brake rubber belt 10 as a separating member having a higher friction coefficient than the plurality of sheets 6 and only one sheet is conveyed in the direction of arrow C. .

[Problems to be solved by the invention]

However, according to the above-mentioned conventional technique, since the banknotes as the paper sheets are printed by the intaglio printing, the ink is slightly projected on the surface of the paper sheets, and such paper sheets are accumulated. Then, the inks on the surface of the respective paper sheets mesh with each other, and the friction coefficient between the respective paper sheets may become larger than usual.

Further, the positions P of the tips of the pickup roller and the paper feed roller are on the same plane in the vertical direction, and when the bills are separated and fed in such a state, a so-called block state in which a plurality of paper sheets are engaged with each other As a result, the number of sheets having a thickness equal to or larger than the width of the gap enters the gap between the sheet feed roller and the gate block, and as a result, the friction coefficient between the sheets is the friction of the brake rubber belt, which is the separating member. Since the coefficient becomes larger than the coefficient, it becomes impossible to separate the sheets one by one by the separating member, which causes a problem such as double feeding or jamming in which a plurality of sheets are conveyed at one time.

Therefore, the present invention has been made in order to solve the above-mentioned problems, and it is possible to prevent the occurrence of jams and the like without double feeding the paper sheets fed out in a block state. To provide a simple automatic paper feeding mechanism.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention provides a guide plate whose lower part is opposed to an inclined surface provided on the tip side of a gate block, a rotatable pickup roller provided on the upper part of the guide plate, and a pickup roller. A pressing plate that presses a large number of sheets stacked in a state of standing in the hopper on the gate block so as to come into pressure contact, and a predetermined gap with the tip of the inclined surface of the gate block is held below the guide plate. And a rotatable paper feed roller that feeds and conveys the paper sheets accumulated in the hopper, and is arranged below the gate block and in contact with the paper feed roller. In an automatic paper feed mechanism including a separating member for separating the conveyed paper sheets from being conveyed,
The guide plate is formed with a protruding surface that is in contact with the lower end of the paper sheet and protrudes toward the inside of the hopper so that the lower end of the paper sheet is bent toward the inside of the hopper near the upper portion of the gate block.

[Action]

After the paper sheets are loaded into the hopper and the pressing plate is driven to press against the opposing guide plate side, the paper sheets are pressed against the paper feed roller and the pickup roller provided on the guide plate side, and are guided. The vicinity of the lower end of the plate is pressed against the protruding surface of the plate.

As a result, the lower ends of the paper sheets are pushed and bent inward of the hopper and curved along the inclined surface of the gate block, so that the number of paper sheets having a thickness equal to or larger than the gap is provided in the gap between the paper feed roller and the gate block. Can no longer enter,
The coefficient of friction between sheets does not increase.

For this reason, the inks do not come out in a block state in which the inks mesh with each other, and therefore the friction coefficient of the paper sheets does not become larger than the friction coefficient of the separating member. It is possible to obtain an automatic paper feed mechanism capable of preventing feeding and jamming.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of an embodiment of the automatic paper feed mechanism of the present invention, FIG. 2 is an enlarged perspective view of a guide plate of the automatic paper feed mechanism of FIG. 1, and FIG. It is a principal part enlarged view which shows a part.

In FIGS. 1, 2, and 3, reference numeral 1 denotes a paper feed roller,
1a is a drive shaft, 2 is a gate block, 4 is a pressing plate, 5 is a hopper, 6 is a paper sheet, 7 is a pickup roller, 7a is a drive shaft, 8 and 9 are pulleys, and 10 is a brake rubber belt as a separating member. Since these are almost the same as those described in the conventional example, the same reference numerals are given and the description thereof is omitted, but the position P ′ of the tip of the pickup roller is the width l with respect to the position P of the tip of the paper feed roller. It's just shifted backwards.

Reference numeral 11 denotes a guide plate, which is made of a thin plate material as shown in detail in FIG. 2, and has both ends outside for guiding when loading or unwinding the paper sheets 6 in the hopper 5. The paper sheet 6 is formed in the hopper 5 by bending it in a curved shape to form a projection surface 11a at a predetermined lower position so as to project inward of the hopper 5.
When the paper sheet is loaded, the protruding surface 11 is placed below the paper sheet 6.
It is arranged so that a is pressed against each other.

Next, the operation of the above-mentioned structure will be described. After a stack of paper sheets 6 is loaded into the hopper 5 from the direction of the arrow A and placed upright on the gate block 2, the pressing plate 4 is pressed toward the guide plate 11 side by a drive source (not shown), When the group 6 is moved, the sheet 6 is fed by the paper feed roller 1 and the pickup roller 7.
While being pressed by, the tip end of the protruding surface 11a of the guide plate 11 is pressed and contacted, and the lower part of the paper sheet 6 is pushed and bent inside the hopper 5.

In this state, when the pickup roller 7 is rotated in the direction of the arrow B and the paper sheet 6 is fed downward, the paper sheet 6 is projected on the protruding surface 11a of the guide plate 11 as shown in FIG.
The guide is curved and the lower end is pressed and bent by the inclined surface of the gate block 2, so that the number of sheets having a thickness larger than the gap cannot enter the gap between the gate block 2 and the sheet feeding roller 1.

After that, when the paper feed roller 1 is also rotated in the direction of the arrow B, the thickness of the paper feed roller 1 and the gate block 2 becomes equal to or less than the gap between the paper feed roller 1 and the gate block 2 due to the frictional force between a part of the curved portion of the paper sheet 6 and the paper feed roller 1. Only the corresponding plural sheets 6 are separated and fed out.

Since the friction type number between the plurality of sheets 6 fed out is smaller than the friction coefficient between the sheet 6 and the brake rubber belt 10, the sheet 6 is surely set to 1 by the brake rubber belt 10.
The sheets are separated one by one and conveyed in the direction of arrow C.

[Effect of device]

As described above, according to the present invention, the lower ends of the paper sheets stacked in the hopper of the automatic paper feed mechanism are brought into contact with the lower ends of the paper sheets and pushed toward the inside of the hopper near the upper portion of the gate block. A projecting surface that projects inwardly of the hopper so as to bend is formed on the guide plate.

According to this, when the paper sheets are loaded into the hopper and then pressed against the guide plate side by the pressing plate, the paper sheets are pressed against the projecting surface of the guide plate and are pressed and bent toward the inside of the hopper.
A plurality of paper sheets having a thickness equal to or larger than the gap between the paper feed roller and the gate block will not be fed out, and the friction coefficient between the paper sheets will not be larger than the friction coefficient between the separation member. The paper sheets are reliably separated and conveyed one by one by the separating member.

For this reason, since the friction coefficient between the paper sheets is large as in the conventional case, the separating member cannot separate the sheets one by one and the sheets are fed in duplicate, and jams and the like are prevented, so that the sheets can be reliably separated one by one. It is possible to obtain an automatic paper feeding mechanism that enables separate paper feeding.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the automatic paper feed mechanism of the present invention, FIG. 2 is an enlarged perspective view of a guide plate of the automatic paper feed mechanism of FIG. 1, and FIG. FIG. 4 is a side view of a conventional automatic sheet feeding mechanism, and FIG. 5 is an enlarged perspective view of the guide plate shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Paper feed roller, 2 ... Gate block 6 ... Paper sheets, 7 ... Pickup roller 10 ... Brake rubber belt, 11 ... Guide plate 11a ... Projection surface

Claims (1)

[Scope of utility model registration request] 1. A guide plate whose lower portion is arranged to face an inclined surface provided on the tip side of a gate block, a rotatable pickup roller provided on the upper portion of the guide plate, and the gate so as to come into pressure contact with the pickup roller. A pressing plate that presses a large number of sheets stacked in a hopper on the block in an upright state, and faces the tip end of the inclined surface of the gate block below the guide plate with a predetermined gap therebetween and the hopper. A rotatable sheet feeding roller for feeding out and transporting the sheets accumulated in the sheet, and a sheet disposed excessively from the inside of the hopper, which is arranged below the gate block and in contact with the sheet feeding roller. An automatic paper feed mechanism having a separating member for separating the conveyance of the paper sheet, the paper sheet lower end being in contact with the paper sheet lower end and being bent toward the inside of the hopper near the upper portion of the gate block. Automatic paper feeding mechanism of the protruding surface protruding Uni該 hopper interior, characterized in that formed on the guide plate.