JPS6133771B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper sheet separating device for separating paper sheets stored in a hopper one by one in, for example, an automatic teller machine or an optical reader.

There are various methods for separating paper sheets stored in the hopper one by one, such as a method using frictional force and a method using vacuum suction force.

In a mechanism that separates paper sheets, the most important things are the multiple feeds in which paper sheets are conveyed in an overlapping manner, and the inclination of the paper sheets that occurs when taking out the sheets (hereinafter referred to as skew). It is to eliminate it. Here, as a means to correct the skew of paper sheets, after separating and taking out the paper sheets one by one,
There is a method of correcting the skew of paper sheets by using a conveyor belt or conveyor rollers during conveyance, but this method has the disadvantage that the conveyance path becomes long.

Japanese Patent Publication No. 54, which was previously proposed by the applicant
No. 32222 (hereinafter referred to as the conventional banknote device) attempts to correct the skew of paper defects when separating the paper defects, and the device is more compact than the above-mentioned device that corrects the skew in the conveyance path. It has the advantage that it can be realized.

Figures 1 to 3 are simplified illustrations of the main parts of a conventional banknote machine, in which a paper stack 2 stored in an upright position in a hopper 1 is fed out by a pick-up roller 3, and then transferred to a feed roller. 4 and a gate roller 5. The gate part is formed by the groove of the feed roller 4 and the gate roller 5.
They are structured so that they fit into each other. When two stacked sheets of paper 2 enter the gate section, they are separated into two types: one that is fed into the rear conveyance path by the feed roller 4, and the other that is stopped at that position by the frictional force of the gate roller 5. In order to correct the skew of paper being conveyed, a stopper roller 6 having a groove and a gate roller 7 that fit into the groove are provided on both sides of the gate roller 5. It takes advantage of the resistance to paper that arises as a result.

The feed roller 4, the gate roller 5, the stopper roller 6, and the gate roller 7 are arranged as shown in FIG. Therefore, the amount of roller overlap between the feed roller 4 and the gate roller 5, and between the stopper roller 6 and the gate roller 7 is the same, and the engagement center point of the four roller entry portions is as shown by arrow A in Fig. 3. They will line up in a straight line. For example, if the paper holder 2 enters the gate in an inclined state (solid line in Figure 3), the stopper roller 6 disposed on the outside
The resistance force generated at the engagement point of the gate roller 7 prevents the paper stack 2 from entering, and as a result, the paper stack 2
A rotational force M is generated, and the paper 2 rotates so as to approach the state shown by the broken line. After correcting the skew of the paper waste 2 in this way, the paper paper waste is sent to the next banknote process.

In the conventional sheet separating apparatus shown in FIGS. 1 to 3, separation and skew correction are performed by overlapping rollers. A disadvantage of this overlapping method is that it requires strict control of the amount of overlap between the rollers, which requires a great deal of time for assembly and adjustment. For example, when the amount of overlap becomes small, the resistance force generated between the feed roller 4 and the gate roller 5 and between the stopper roller 6 and the gate roller 7 becomes small, so that sufficient separation operation and skew correction operation cannot be performed. On the other hand, when the amount of overlap increases, the bending of the edge of the paper increases, and the edges of the paper are damaged by the corners between the rollers. For this reason, strict tolerances for the amount of overlap are required and must be maintained at all times. However, in order to generate frictional force, the gate rollers 5 and 7 are made of a material with a high friction coefficient such as rubber, which makes it extremely difficult to obtain strict processing accuracy.
The gate rollers 5 and 7 are worn out depending on the number of sheets of paper conveyed due to contact with the paper. Therefore, the initially set overlap amount changes by the amount of wear. As a result, since the adjustment range for the amount of overlap is narrow as described above, there is a high risk that multiple feeds will occur or that sufficient skew correction will not be performed. In order to solve this problem, it is necessary to frequently check the amount of overlap and make strict adjustments, which makes management very difficult and poor maintainability.

In addition, this conventional banknote device has the function of correcting the skew of paper defects, but the engagement point between the stopper roller 6 and the gate roller 7, which corrects the skew by temporarily stopping the paper defect 2, ie, the skew correction point A ₁
The engagement point between the feed roller 4 and the gate roller 5 that separates the paper from the paper, that is, the separation action point _A2 is the third point.
As shown in the figure, since they are located in a straight line, the skew correction operation and the separation operation are performed at the same time.

Therefore, for example, when the separation gate roller 5 is made larger than the skew correction gate roller 7, the separation action point _A2 becomes the skew correction point.
Since the paper failure 2 enters the separating engagement portion first before _A1 , a problem arises in that the skew correction operation does not work satisfactorily.

In order to avoid this problem, the processing precision of the rollers used must be extremely high, but it is necessary to line the circumferential surface of the roller with a rubber material to generate frictional force. It is very difficult to obtain, and there are major problems in processing and assembly.

In addition, if the resistance force against the paper failure 2 generated at the engagement point A ₂ between the feed roller 4 and the gate roller 5 is small, the paper failure 2 will move to the engagement point _A 2 between the feed roller 4 and the gate roller 5 without sufficiently correcting the skew. will pass through. In other words, as mentioned above, since the separation action point A ₂ and the skew correction point A ₁ are on the same line, the paper failure 2 is caused by the separation action point A ₂
Immediately after passing through, it enters the skew correction point _A1 and is fed out, so it is separated and conveyed in the skewed state, and the next process, for example, the accuracy of identification in the case of paper defects, and the accuracy of character reading in the case of forms. will have a negative impact on.

In view of the above points, the present invention provides a wide adjustment range for the separation means and skew correction means of the paper sheet separation device, facilitates assembly, and allows for easy adjustment even when conveying a large number of paper sheets. The object of the present invention is to provide a high-performance paper sheet separation device by making the skew correction operation more effective.

The present invention is characterized by a separating means for separating paper sheets using a feed roller and a gate roller that faces and presses against the feed roller;
A skewer that corrects the inclination of paper sheets by applying resistance to incoming paper sheets by means of stopper rollers disposed on both sides of the separating means and gate rollers opposing and pressing against the stopper rollers 6. The gate roller of the separating means and the gate roller of the skew correcting means are eccentrically supported on the same axis, and the eccentricity of the gate roller of the skew correcting means is adjusted by adjusting the eccentricity of the gate roller of the separating means. This is smaller than the amount of eccentricity.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

FIG. 4 shows the device of the present invention applied to an automatic teller machine, with a depositor inserting a piece of paper into the hopper from the slot.

In Figure 4, paper money deposited by depositors8
are all stored in the hopper 9 in an upright position.

This hopper 9 is composed of a front plate 9a, a push plate 9b that moves in the front-rear direction, a bottom plate 9c, and a side plate (not shown). Front paper error 8
A gap is provided for sending the material downward by a pick-up roller 10, which will be described later. Further, a long hole 9d is bored in the horizontal direction slightly below the center of the front plate 9a of the hopper 9, and this long hole 9d holds the frontmost sheet of the paper sheet in the hopper 9. A pick-up roller 10 for delivering the paper 8 to the gap is faced, and a friction member 10a made of rubber, for example, is attached to the circumferential surface of the pick-up roller 10 over the entire width. It is opposite to the paper side 8 of the section. 11 is a feed roller provided on a shaft 11a that is close to the gap provided at the lower end corner of the hopper 9 and at the center in the width direction of the paper sheet, and is rotatably supported by the machine frame; A friction member 11b made of rubber or the like having a required length is attached to a part of the circumferential surface of the feed roller 11, and the friction member 11b serves to prevent paper damage 8.
I try to scrape it out. The shaft 11a of this feed roller 11 is driven by an electric motor via a clutch brake. This feed roller 1
The rotation of the shaft 11a is transmitted to the pick-up roller 10 via a rubber roller 13 from a roller 12 having a convex portion 12a integrally attached to the end of the shaft 11a. A gate roller 14 is in contact with the feed roller 11, and this gate roller 14
A bill means is constituted by the feed roller 11 and the paper money sent out to the engagement portion between the feed roller 11 and the gate roller 14 by the rotation of the pick up roller 10 is conveyed to the rear conveyance path 15. Feed roller 11 of the gate roller 14
The pressing force is adjusted by the tensioner 16. This gate roller 14 is mounted eccentrically with respect to the shaft 14a.

As shown in FIG. 5, there are stopper rollers 17 and gate rollers 18 on both sides of the banknote means that applies a separating force to the paper stack 8, that is, at both ends of the paper stack 8 being conveyed.
The stopper roller 17 and the gate roller 18 constitute a skew correction means. The stopper roller 17 is made of, for example, metal, and is designed to reduce the frictional force with the paper stack 8 and not to apply a conveying force to the paper stack 8 depending on its rotation. Also, the gate roller 18
On the other hand, it is made of a member with high frictional resistance, such as a rubber roller, and is designed to stop or reverse when paper feeds out. The gate roller 18
The pressing force on the stopper roller 17 is the tensioner 1
Adjusted by 9. This gate roller 18 is connected to the shaft 14
Although the gate roller 14 is mounted eccentrically at point a, the amount of eccentricity is smaller than the amount of eccentricity of the gate roller 14.

Since the eccentricity of the gate roller 14 and the gate roller 18 is different, the points where the gate roller 14 and the gate roller 18 engage with the feed roller 11 are A ₂ and A _1, respectively, as shown in FIG. are different. That is, the gate roller 18
By attaching the gate roller 14 to the shaft 14a with an eccentricity smaller than that of the gate roller 14, the gate roller 14 is placed at a position preceding the separation action point _A2 where the separation action force is generated.
Skew correction force application point where skew correction force occurs
A ₁ can be installed.

As a result, if the paper edge 8 sent out by the pick-up roller 10 is tilted, the inclination of the paper edge 8 is first corrected at the skew correction force application point _A1 , and the paper edge 8 is aligned. After that, the paper strips 8 are separated one by one at the separation point _A2 by the cooperative action of the pick-up roller 10 and the feed roller 11.

According to the present invention, the following effects are achieved.

1. Both gate rollers are pressed against the feed roller with a constant tension using a tensioner, so even if the gate rollers wear out, a new sliding surface always appears, and compared to the conventional overlapping method, No adjustment is required, and even if many sheets are conveyed, the skew correction operation can be made more effective without any adjustment.

Accordingly, the precision of the constituent parts becomes looser, the workability is increased, and the initial adjustment and assembly adjustment of the separation means and the skew correction means are facilitated.

2. Since the point of application of the skew correction force can be located upstream of the point of application of the separation, the action of correcting the skew of the sheet acts more effectively.

As a result, it is possible to improve the performance and reliability of the apparatus in subsequent processing steps, such as identifying characters on paper sheets and paper defects, and to eliminate causes of jams and the like.

Further, in the above embodiment, the paper stacks 8 are placed in an upright position within the hopper 9, but the present invention is not limited to this, and the paper stacks 8 within the hopper 9 may be piled up in a plane direction. good.

Further, in the above-described embodiment, the eccentricity of the gate rollers is made different, but the same effect can be obtained even if only the gate roller of the separation means is eccentric.

In addition, in the above embodiment, the paper sheet separation device of the present invention is applied to an automatic teller machine to separate and convey paper waste, but if it is necessary to correct the skew and separate the paper sheets, what should be done? It goes without saying that it may be used in other things.

This effect is particularly great when the paper sheets to be handled are paper waste as in this embodiment.

[Brief explanation of the drawing]

Figures 1 to 3 show a conventional paper sheet separation device, with Figure 1 being a partially sectional side view, Figure 2 being a roller arrangement, and Figure 3 showing the skew state. , FIG. 4 to FIG. 6 show an embodiment of the paper sheet separation device of the present invention, FIG. 4 is a partially sectional side view, FIG. 5 is a front view of the main part, and FIG. The figure is a diagram showing its operating state. 8...Paper leaves (paper leaves), 9...Hotsupa, 10...
... Pick up roller, 11 ... Feed roller, 14 ... Gate roller, 14a ... Axis, 1
6, 19...Tensioner, 17...Stop roller, 18...Gate roller, _A1 ...Point of application of skew correction force, _A2 ...Point of application of separation force.

Claims (1)

[Scope of Claims] 1. In a paper sheet separation device that separates and conveys paper sheets 8 stored in a hopper 9 one by one, the paper sheets 8 are pressed against a feed roller 11 in opposition to the feed roller 11. Paper sheets 8 that have entered are separated by a separating means that is separated by a gate roller 14, a stopper roller 17 disposed on both sides of the separating means, and a gate roller 18 that presses against the stopper roller 17. skew correction means for correcting the inclination of the paper sheets 8 by applying resistance to the paper sheets 8; the gate roller 14 of the separation means and the gate roller 18 of the skew correction means are eccentrically supported on the same shaft 14a; A paper sheet separating apparatus characterized in that the eccentricity of the gate roller 18 of the skew correcting means is set to be smaller than the eccentricity of the gate roller 14 of the separating means.