JPS61282243A - Oblique advance correcting device for paper sheet - Google Patents

Abstract

PURPOSE:To correct oblique advance without casing rimples by passing a paper sheet through first carrying roller having low holding force and high speed to hold the paper sheet between two separated points and through second carrying roller having high holding force and low speed. CONSTITUTION:A paper sheet S held by idle rollers 10a, 10a and drive rollers 11a, 11a is carried to an idle shaft 12 with the angle making against the carrying path. Since the circumferential speed V1 of the idle roller 10a is higher than that V2 of the idle roller 11a, the paper sheet S advancing obliquely while holding the leading edge between the idle rollers 10b is pushed by the idle roller 10a from the rear to provide rotary force toward the center of the idle roller 11b in the direction for reducing the oblique angle thus to correct oblique advance. The paper sheet is pulled out by the idle roller 11b from the idle roller 10a and carried. With such arrangement, oblique advance can be corrected without causing rimples.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is a paper sheet processing device that corrects the conveyance posture, particularly the skew, of paper sheets that are conveyed one by one on a conveyance path. This invention relates to a paper sheet skew correction device that can correct paper sheets.

[Technical background and problems of the invention]

Conventionally, a paper sheet processing device that counts paper sheets, such as banknotes, according to their denominations, feeds out the banknotes one by one from a banknote feeding unit and then uses a discriminating unit installed on the banknote conveyance path to count the banknotes by denomination. Seeds, fitness, front and back.

After determining the count, etc., the coins are stored in a collection section by denomination.

However, even if the banknotes are accurately aligned and fed out in the supply section, a phenomenon called skew occurs on the conveyance path. Ideally, one side of the banknote is conveyed in a direction perpendicular to the conveyance direction, but as the direction changes depending on the conveyance conditions, this skew becomes thick (becomes a certain amount). If the limit is exceeded, for example, the discriminating section cannot make a determination, or the erroneously determined one banknote gets clogged in the middle of the conveyance path.

As a solution to this problem, a feeding device for a paper sheet counter (Utility Model Application No. 57-20063) has been proposed. FIGS. 7 and 8 show schematic mechanical diagrams of the feeding device of this sheet counting machine.

In FIGS. 7 and 8, a shaft 52 held by a support (not shown) and a first conveyance roller 53 located at the center of this shaft 52 are shown.
, guide rollers 54 and 54 are rotatably attached to both sides thereof.

These first conveyance rollers 53 and guide rollers 54
Drive rollers 55 are arranged so as to sandwich the paper sheet l1ls, and these drive rollers 55 strongly pinch the paper sheet S with the first conveying roller 53, and also sandwich the paper sheet S with the guide roller 54. The class S is sandwiched weakly or with a gap, and is rotated integrally by the integral rotating wheel 56. In addition, as shown in FIG. 8, a shaft 57 is rotatably supported at a position a required distance (a pitch smaller than the dimension of the sheet S in the conveyance direction) in the conveyance direction of the 11IIIi feed roller 53. A guide roller 58 is attached to the shaft 57 approximately at its center, and second conveyance rollers 59.59 are attached to both sides of the guide roller 58. These two second conveyance rollers 59 and 59 are arranged parallel to each other with respect to the conveyance tangent direction of the first conveyance roller 53 and in contact with the vicinity of both width ends of the paper sheet S in the conveyance direction.

Further, drive rollers 60 are disposed between the guide rollers 58 and the two second transport rollers 59 and 59 so as to sandwich the sheet S, and these drive rollers 60 and the second transport rollers 59 The paper sheets are strongly pinched, and the guide roller 5
8, sandwich the paper sheet S weakly or with a gap,
They are rotated integrally by the second rotating shaft 61, and at this time, consideration is given so that the circumferential speed of the second conveyance roller 59 is slightly slower than the circumferential speed of the conveyance roller 53.

According to the above device, the first conveyance roller 53 and the drive roller 5
Due to the difference in the circumferential speed between the 1111th conveyance roller 53 and the second conveyance roller 59, for example, thin sheets of paper may wrinkle or the like. Because the rollers 53 forcefully pinch the paper sheets, there are places where the force is concentrated on the paper sheets that are inevitably pinched.
The above-mentioned wrinkles and sagging occur, which causes problems other than straightening the paper sheets.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a paper sheet skew correction device that can correct the skew of paper sheets without causing wrinkles or sagging of the paper sheets. With the goal.

[Summary of the invention]

The outline of the present invention for achieving the above is as follows: a first conveying roller that conveys the paper sheet by pinching two separated parts of the sheet;
A second conveyance roller is provided at a later stage in the conveyance direction of the paper sheet than the first conveyance roller, and the second conveyance roller pinches and conveys the paper sheet at two spaced apart locations, and the second conveyance roller The circumferential speed of the first conveying roller is lower than that of the first conveying roller, and the clamping force of the first conveying roller is weaker than the clamping force of the second i11 conveying roller. The present invention is characterized in that the paper sheet is corrected for skew while passing through the second conveyance roller.

[Embodiments of the invention]

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

FIG. 1 is a schematic perspective view of one embodiment of this device, and FIG.
FIG. 3 is a front view of the first idle shaft of the embodiment shown in the figure, FIG. 3 is an explanatory diagram of the operation of the present invention, FIG. FIG. 6 is a side view of a modified example of the device, and FIG. 6 is a front view showing a modified example of the first idle roller of the device.

In FIG. 1, the first conveyance roller includes an idle shaft 10 and an idle roller I provided apart from the idle shaft 10.
Qa, 10a, two drive rollers 11a, 11a provided in contact with the idle rollers 10a, 10a so as to be able to clamp paper sheets, and a drive shaft 11 fixed to the drive rollers apart from each other. Ru. Further, the idle shaft 10 and the drive shaft 11 are provided in a direction perpendicular to the conveyance direction of paper sheets, and are provided so as to sandwich a conveyance path (not shown) between them. Similarly, the 2111th feed roller is provided with two idle rollers 12b, 12b provided apart from each other, an idle shaft 12 to which these rollers are attached, and the idle rollers 12b, 12b in contact with each other so as to be able to clamp paper sheets. The second conveyance roller is provided parallel to the first conveyance roller and spaced apart from the first conveyance roller so as to sandwich the conveyance path therebetween.

Further, if the circumferential speed of the idle rollers 10a, 10a is vl, and the circumferential speed of the idle rollers 12b, 12b is F2, then V, , V are set so that the relationship Vl >v. At the same time, the clamping force between the idle rollers 10a, 10a and the drive rollers 11a, 11a is set to Fl, and the idle roller 12b.

Assuming that the clamping force between roller 12b and drive rollers 13b and 13b is F2, the relationship between these clamping forces is set so that Fl<F2.

FIG. 2 shows the drive shaft 11 and the idle shaft 10 shown in FIG. 1, and the idle rollers 10a provided on the idle shaft 10 and the drive shaft 11, respectively.

10a, drive rollers 11a, 11a, and the state of paper sheets S held between these rollers.

The operation of the above device will be explained.

The paper sheets S are fed out one by one from a paper sheet supply unit (not shown) and are conveyed through a paper sheet conveyance path (not shown) to the first
Idle roller 1 provided on the idle shaft 10 shown in the figure
0a, 10a, and a drive roller lla that comes into contact with these,
It is held by lla.

The clamped paper sheets S are conveyed to the idle shaft 12 while maintaining the angle with respect to the conveyance path through which they were conveyed. At this time, as shown in FIG. 3, when the paper sheet S is skewed by an angle θ with respect to the idle shaft 12, the circumferential speed V of the idle roller 10a and the circumferential speed v2 of the idle roller 12b are different. Since the relationship is V,>v, one end of the paper sheet S is held by one of the idle rollers 12b as shown in the figure, and while moving in the direction of the arrow A at a circumferential speed of Vt, the paper sheet S is moved by the idle roller 10a. One end where it is clamped is moved in the direction of arrow A at a circumferential speed of V.

Then, since the relationship between the circumferential speed ranges of the idle roller 10a and the idle roller 12b is V I > V 2, the paper sheet @S
A force is applied approximately to the center of the idle roller 12b holding the .theta., so that the angle .theta. is reduced, and the angle .theta. is corrected to the angle .theta.2.

In this case, the relationship between F and F2 is F I < F z
Since this is set to
No bending, wrinkles, etc. will occur between the conveyor shafts.

Next, FIG. 4 shows a second embodiment of this apparatus. FIG. 5A shows a schematic perspective view of the mechanism of the second embodiment.

In the figure, an idle shaft 8 provided perpendicularly to a conveyance path for conveying paper sheets in the direction of the arrow, and the idle shaft 10, idle shaft 12, and idle shaft 14 described above are connected to the idle shaft 8. are placed in parallel. These shafts 8, 10, 12, 14 are provided with conveyor rollers 8c, 1, respectively.
oa, 12b.

14d are rotatably attached two at a time at a distance. These idle rollers 8c, 10a12b, 14
Drive rollers 9c that come into contact with each other so as to sandwich paper sheets across the transport path.

11a, 13b, and 15d are provided, respectively.

In addition, these drive rollers 9c, 11a, 13
b.

Drive shafts 9, 11.1315 to which the drive shafts 15d are respectively fixed are provided parallel to the idle shafts 8.10.12.14, among which the drive shaft 13 has paper sheets conveyed on this drive shaft. A clutch is provided that can be disconnected from a drive source (not shown) when a speed greater than the transport speed is applied.

Further, the peripheral speed of the idle roller 8C is F3, and the peripheral speed of the idle roller 14d is 9. At the same time, the clamping force between the drive rollers 9c, 11c13b, and 15d that are in contact with the idle rollers 8c, 10a, 12b, and 14d, respectively, is set to F3. Fl.

Let it be Fa, Fa. Furthermore, F+, Fz, Vl, Vt
The relationship is as detailed in FIG.

Here, the relationship between the circumferential speed of each idle roller is v, <F3
, vt , F4, and at the same time, the relationship of the clamping force of each idle roller with each abutting drive roller is F'l <Fz
<Fx, set as Fa.

FIGS. 4(b) and 4(C) are explanatory views of the operation of the apparatus shown in FIG. 4(a). In the same figure (b) and (C),
The paper sheets conveyed to the idle rollers 10a, 10a by the idle rollers 8c, 3c are transferred to the idle roller IQa as described in detail above.

10a and idle rollers 12b, the oblique angle of the sheet is corrected while passing through the idle rollers 12b, 12b. And from the idle rollers 12b, 12b to the idle rollers 14d, 14
When paper sheets are fed out in the relationship V Z <V 2 +V, V4, especially here V < V, so the circumferential speed of the idle rollers 12b, 12b is increased. A force will act on it. Here, drive shaft 1
By providing the clutch in 3, it is possible to prevent unreasonable tensile force from being applied to the paper sheets passing through the clutch.
The conveying speed can be quickly returned to the speed before being conveyed to the skew correction device.

The present invention is not limited to the embodiments described above, and can be implemented with various modifications within the scope of the gist of the present invention. For example, in the embodiment described above, the paper sheets were held between the idle roller and the drive roller, but the invention is not limited to this, and as shown in FIG. Plate 10c that can cause
You can also use the board 1 to hold paper sheets.
A belt conveyor that can generate slippage instead of 0C may also be used. In addition, at this time, the idle roller 10
It is necessary to be able to apply a drive to a. Further, the idle roller 10a is not necessarily limited to a cylindrical shape, but may have the shape shown in FIGS. 6(a) and 6(b).

〔Effect of the invention〕

As described in detail above, the present invention is capable of correcting the conveyance posture of paper sheets during conveyance, especially skew, without interrupting the conveyance operation, so that, for example, a paper sheet processing device can It is possible to improve the discrimination accuracy in the discriminator in the discriminator. Therefore, it is possible to reduce the number of misclassifications that cannot be determined, thereby significantly improving the processing capacity of the paper sheet processing device.Also, since the paper sheets are held between two points, it is possible to apply force to the paper sheets in a concentrated manner. It disappears. Furthermore, since the clamping force of the idle roller 10a is set to be weaker than that of the idle roller 12b,
For example, it is possible to provide a paper sheet skew feeding device that prevents wrinkles, bending, etc. from occurring.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of one embodiment of this device, and FIG.
3 is an explanatory diagram of the operation of the device, FIG. 4(a) is a schematic mechanical diagram of the second embodiment of the device, and FIG. b). (c) is an explanatory diagram of the operation, FIG. 5 is a side view of a modified example of the present device, and FIGS. 6 (a) and (b) are front views showing a modified example of the first conveyance roller of the present device. FIG. 7 and FIG. 8 are schematic explanatory diagrams of a conventional example. 10a - 11th transport roller, 12b... 2nd transport roller. Figure 4 5 (G) - (b) (C) 3b (b)

Claims (1)

[Scope of Claims] A first conveyance roller that conveys the paper sheet by pinching two separated parts of the sheet; and a second conveyance roller that pinches and conveys two separated parts of the leaves, the second conveyance roller has a peripheral speed lower than that of the first conveyance roller, and the clamping force of the first conveyance roller is A method for correcting the skew of paper sheets, characterized in that the gripping force is weaker than that of the second transport roller, and the skew of the paper sheets is corrected while passing through the first and second transport rollers. Device.