JP2682866B2 - Pressure adjustment mechanism in paper feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] The present invention relates to a paper feeding device that sequentially feeds paper sheets such as banknotes like a banknote feeding device installed in a bank, etc. In order to perform the operation, the pressure adjusting mechanism that adjusts the pressure applied to the delivered paper sheets to the optimum pressure is provided by stacking paper sheets such as banknotes from the bottom to the top, and delivering the paper sheets at the lowest position one by one. The purpose of the paper machine is to provide a pressure adjustment mechanism in the paper feeding device that improves the reliability of the paper feeding device by feeding the paper sheets to the outside at the optimum feeding pressure. In a sheet feeding device that sequentially feeds paper sheets such as banknotes stacked in the direction from the paper sheet at the lowermost position by a feeding roller, a pressure detection means for detecting the pressure applied to the paper sheet at the lowermost position, and the pressure detection means. The pressure detected by the means exceeds the specified upper limit value. And a lifter that stops the operation when it falls below a predetermined lower limit value.By the operation of the lifter, a part of the stacked paper sheets is lifted to the lowermost paper sheet. While depressurizing the applied pressure,
By stopping the operation of the lifter, the lifted paper sheets are returned to the storage box, the pressure applied to the lowermost paper sheet is increased, and the pressure applied to the lowermost paper sheet is adjusted. Is characterized by.

[Industrial applications]

The present invention relates to a sheet feeding device that stacks banknotes from the lower side to the upper side and feeds out the banknotes one by one from the lowermost position banknote, such as a banknote supplying device adopted in a bank or the like. The present invention relates to a pressure adjusting mechanism in a sheet feeding device that adjusts the pressure of paper sheets to an optimum pressure to smoothly feed out the paper sheets.

[Conventional technology]

For example, a banknote feeder used in a bank or the like has a configuration in which paper sheets such as banknotes are stacked from the bottom to the top and fed out one by one from the paper sheets at the lowest position. In order to stabilize the feeding, it is desirable that an appropriate pressure is always applied to the sheet at the lowermost position, and this pressure has an upper limit and a lower limit suitable for feeding.

For example, as shown in FIG. 9, paper sheets 2 such as banknotes are vertically stacked and stored in a storage box 1,
This is a mechanism for feeding the paper sheet 2a at the lowermost position to the outside by the feeding roller 3, and the paper sheet 2a at the lowest position is directed upward from the pressing lever 5 which is spring-biased by the coil spring 4. The pressure is applied, and a downward pressure is applied from the pressure 6. By adjusting both of these pressures, the optimum pressure is applied to the paper sheet 2a at the lowermost position. Reference numeral 7 in FIG. 9 indicates a pressure detecting sensor.

Further, the paper sheets 2 stored in the storage box 1
When a large number of sheets are stacked, a very large pressure is applied to the lowermost sheet 2a due to the weight of the sheets 2, and therefore the depressurization belt 8 made of rubber or the like is attached to the driving roller 9a. It is configured to be circulated and driven to apply an external force in the upward direction to the paper sheet 2 to depressurize the pressure applied to the paper sheet 2a at the lowermost position.

[Problems to be solved by the invention]

However, such a depressurization mechanism by the depressurization belt 8 is a depressurization action by friction between the belt 8 and the sheet 2, and it is difficult to depressurize the frictional force beyond the limit value. It has been pointed out that the function is limited, and because the pressure is removed by friction, the paper slips off the belt 8 during feeding, causing jams due to poor feeding. At the same time, the drawback of being inferior in sex was pointed out.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a paper feeding device that stacks paper sheets from the lower side to the upper side and feeds the lowermost paper sheet one by one. By constantly adjusting the pressure applied to the paper sheet at the lowermost position to an optimum range, it is possible to smoothly feed the device and to provide a pressure adjusting mechanism in the paper feeding device that improves the reliability of the device. .

[Means for solving the problem]

According to the present invention, the above object is to provide a paper feeding device for sequentially feeding paper sheets such as banknotes stacked vertically in a cash box from a paper sheet at the lowest position by a feeding roller. The pressure detecting means for detecting the pressure applied to the leaf, and when the pressure detected by the pressure detecting means exceeds a predetermined upper limit value, it enters a partition between the sheets and lifts the upper sheet, The pressure applied to the paper sheet in the lower position is reduced, and when the pressure detected by the pressure detection means falls below a predetermined lower limit value, the lifting operation is canceled and the upper paper sheet is stacked on the lower paper sheet. However, it is achieved by providing a pressure adjusting mechanism in the sheet feeding device that increases the pressure applied to the sheet at the lowermost position.

[Action]

As is apparent from the above configuration, according to the pressure adjusting mechanism in the sheet feeding device of the present invention, when the pressure applied to the paper sheet at the lowermost position exceeds the predetermined upper limit value, the lifter operates and the paper By lifting a part of the leaves, the own weight of the paper sheet located above the lifter setting position is added to the lifter,
Only the own weight of the paper sheets positioned below the lifter setting position is applied to the paper sheet at the lowermost position, and the pressure applied to the paper sheet at the lowermost position can be released.

Further, when the pressure applied to the lowermost position falls below a predetermined lower limit value, the operation of the lifter is stopped, the paper sheet lifted by the lifter is returned to the storage box, and the own weight of these paper sheets becomes the maximum. Since it is applied to the lowermost sheet, the pressure applied to the lowermost sheet can be increased.

〔Example〕

Hereinafter, embodiments of the pressure adjusting mechanism in the sheet feeding device according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 5 are schematic configuration diagrams showing a first embodiment of the sheet feeding device according to the present invention, and FIGS. 6 to 8 are schematic diagrams showing other examples of the sheet feeding device according to the present invention. It is a block diagram.

First, a first embodiment of the paper feeding device according to the present invention will be described with reference to FIG.

The paper feeding device 10 according to the present example has paper sheets 12 such as banknotes stacked and accommodated in a storage box 11 from below to above,
The lowermost paper sheet 12a is fed one by one by the feeding roller 13, and the pressure detecting means 14 for detecting the pressure applied to the lowermost paper sheet 12a is provided.
The pressure detection means 14 includes a pressure detection lever 15, a support pin 16 that rotatably supports the pressure detection lever 15, a coil spring 17 that biases the lever 15 upward, and a pressure detection lever 15. It is composed of a pressure detection sensor 18 for detecting the pressure applied to the lowermost position depending on the rotation angle.

Further, in the present example, the pressure detection means 14 described above,
It is characterized in that it is constituted by a lifter 20 which is operated by a rotary drive shaft 19 and lifts the paper sheet 12. This lifter
The reference numeral 20 is set at a position from the reference plane (bottom position of the storage box 11).

As shown in FIG. 2, the rotary drive shaft 19 and the lifter 20 are configured such that the rotary drive shaft 19 rotates approximately 90 ° from the inactive state of the lifter 20 shown by the solid line in FIG. 2 As indicated by the chain line in the figure,
Lifters 29 are inserted from the left and right sides of 12 to lift the upper paper sheet 12, and the weight of the upper paper sheet is at the lowest position.
The pressure is released so as not to be applied to 12a.

That is, when the pressure detecting means 14 causes the pressure applied to the paper sheet 12a at the lowermost position to exceed a predetermined upper limit value due to the weight of the paper sheet 12 itself, the lifter 20 rotates the rotary drive shaft 19 as shown in FIG. Operation, the paper sheet 12 is inserted into the paper sheet 12 and the paper sheet 12 located above the set position of the lifter 20 is lifted to receive the weight of the paper sheet 12 at the upper position by the lifter 20.
The pressure applied to the paper sheet 12a at the lowermost position is adjusted by depressurizing so that only the weight of the paper sheet below the set position of 20 is applied to the paper sheet 12a at the lowermost position.

Then, if the lowermost paper sheet 12a is sequentially fed out by the feeding roller 13, the pressure detected by the pressure detection lever 15 gradually decreases, and when it falls below a predetermined lower limit value, a smooth paper sheet is obtained. In this example, the upper paper sheets supported by the lifter 20 cannot be obtained because the paper feeding operation cannot be performed.
12 is returned to the base position and the pressure applied to the paper sheet 12a at the lowest position is increased to obtain an appropriate pressure (see FIG. 4).

For this purpose, the lifter is lowered by an elevating mechanism (not shown), and then the rotary drive shaft 19 is rotated to lift the lifter 20.
Is arranged outside the storage box 11 to further stack the paper sheets 12 and increase the pressure applied to the lowermost position by the weight of the paper sheets 12 to obtain an appropriate pressure. If it is desired to increase the pressure applied to the lowermost position 12a, as shown in FIG.
Therefore, the uppermost paper sheet 12b may be pressurized.

In the above-described embodiment, the lifter 20 is operated by the rotary drive shaft 19. As this lifter, a rack 23 is formed on the lifter 22 as shown in FIG.
By rotating the pinion 24 that meshes with the lifter 22 and moving the lifter 22 in the direction of the arrow, even if the paper sheet 12 in the storage box 11 is lifted and the pressure applied to the paper sheet 12a at the lowest position is adjusted. Alternatively, as shown in FIG. 7, a lifter 25 that can be rotated in the vertical direction may be installed to have the same function.

Further, as shown in FIG. 8, if the spiral shaft 26 shown in FIG. 8 is used as a rotary drive shaft for rotationally driving the lifter 20, the lifter 20 is rotated to perform a partitioning operation. At the same time, the operation of slightly lifting can be achieved, and lifting and lowering of the lifter 20 can be easily performed by rotating the shaft 26 itself.

As described above, according to the pressure adjusting mechanism in the sheet feeding device of the present invention, the pressure detecting means for detecting the pressure applied to the lowermost sheet of the vertically stacked sheets and the sheet above the appropriate position. Although it has a simple structure including a lifter for lifting leaves, the pressure applied to the paper sheet at the lowest position can always be adjusted to the optimum pressure, so that a smooth feeding operation can be expected.

〔The invention's effect〕

As is apparent from the above description, the present invention is a pressure adjusting mechanism in a sheet feeding device that sequentially feeds paper sheets stacked vertically in a storage box from the paper sheet at the lowest position, Pressure detecting means for detecting the pressure applied to the paper sheet and when the pressure detected by the pressure detecting means exceeds a predetermined upper limit value, the lifter is operated to lift the paper sheet and To reduce the pressure on the sheet at the lowest position, and when the pressure at the lowest position falls below a specified lower limit, lifter operation is stopped and lifted by the lifter. The optimal pressure is always returned to the bottom position by returning the stored paper sheets to the base position in the storage box and increasing the weight of the paper sheets to increase the pressure applied to the bottom position. Guarantees optimum feeding pressure in addition to leaves The Rukoto, smooth feeding device can be expected, it has the effect of significantly improve the reliability of the device.

[Brief description of the drawings]

FIG. 1 is a schematic configuration view showing a first embodiment of a pressure adjusting mechanism of a sheet feeding device according to the present invention, FIG. 2 is a view as seen from an arrow A in FIG. 1, and FIGS. 1 is a schematic configuration diagram showing a state in which a pressure adjusting mechanism according to one embodiment is operated, and FIGS. 6 to 8 are schematic configuration diagrams showing another embodiment of the pressure adjusting mechanism of the sheet feeding device according to the present invention. 9 to 10 are explanatory views each showing a pressure adjusting mechanism in a conventional sheet feeding device. In the figure, 10 ... Paper feeder 11 ... Storage box 12 ... Paper sheet 12a ... Paper sheet at the lowest position 13 ... Feed roller 14 ... Pressure detection means 15 ... Pressure detection lever 17 ... Coil spring 18 …… Pressure detection sensor 19 …… Rotation drive shaft 20,22,25 …… Lifter 21 …… Pressure plate 23 …… Rack 24 …… Pinion 26 …… Helix shaft.

Claims (1)

(57) [Claims] 1. In a paper feeding device for sequentially feeding paper sheets such as banknotes stacked vertically in a cash box from a paper sheet at the lowest position by a feeding roller, a pressure applied to the paper sheet at the lowest position. And a pressure detecting means for detecting the pressure detecting means, and when the pressure detected by the pressure detecting means exceeds a predetermined upper limit value, it enters a partition between the sheets and lifts the upper sheet, The pressure applied to the paper sheet is reduced, and when the pressure detected by the pressure detecting means falls below a predetermined lower limit value, the lifting operation is canceled and the upper paper sheet is stacked on the lower paper sheet. A pressure adjusting mechanism in the paper feeding device that increases the pressure applied to the paper sheet in the lower position.