KR20090032953A - Device for detecting thickness of paper sheet - Google Patents

Abstract

A mass thickness detector is provided that the structure is minimized by reducing the mounting space of the driving roller. A mass thickness detector(1) comprises a standard roller(2), a driving roller(4) which is arranged side by side toward the axial direction of the standard roller and can be displaced, detection means which detects the displacement of the driving roller when the paper currency is inserted in both rollers. The concave part and convex part are formed side by side toward the peripheral surface direction of the driving roller.

Description

Medium thickness detector {DEVICE FOR DETECTING THICKNESS OF PAPER SHEET}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medium thickness detection device provided in an automatic transaction device of a financial institution, and the like, for detecting the thickness of a medium such as a bill.

The conventional medium thickness detection apparatus is provided with the detection part by the thickness detection sensor which measures the displacement by which a movable roller and this movable roller ride on a banknote, and a detection part in the axial direction of a drive roller upstream of the conveyance direction of a banknote. Are arranged on the banknote by alternately arranging the detection units arranged in two rows so as to arrange a plurality of detection portions downstream of the conveyance direction of the banknote so as to supplement a place where the movable roller does not ride on the banknote between the detectors. Foreign matter is detected (for example, refer patent document 1).

 [Patent Document 1] Japanese Unexamined Patent Publication No. 2004-83172 (paragraph "0022"-"0023", Fig. 1)

However, in the above-described conventional technique, since a large amount of space for mounting the detection unit is required to arrange the detection units in two rows, there is a problem in that the medium thickness detection device cannot be miniaturized.

An object of the present invention is to provide a means for solving the above problems.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, the movable roller arrange | positioned side by side in the axial direction of the said reference roller for conveying a banknote between this reference roller and this reference roller, and the said both rollers carry a banknote. A medium thickness detecting device having a detecting means for detecting a displacement of the movable roller when it is fitted, wherein both ends of the movable roller are cut out to alternately form concave portions and convex portions in the circumferential direction so that adjacent movable rollers concave. The parts and the convex parts are fitted to each other and arranged.

As a result, the present invention can reliably detect foreign matters attached to the banknote and detect foreign matters by a line of movable rollers and a thickness detecting means arranged opposite to the reference roller, thereby reducing the mounting space of the movable rollers. As a result, the effect of miniaturization of the medium thickness detection device can be obtained.

EMBODIMENT OF THE INVENTION Below, the Example of the medium thickness detection apparatus by this invention is demonstrated with reference to drawings.

Example 1

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the medium thickness detection apparatus of Example 1, and FIG. 2 is a side view which shows the medium thickness detection apparatus of Example 1. FIG.

In FIG. 1, FIG. 2, 1 is a medium thickness detection apparatus provided in the inside of an automatic transaction apparatus of a financial institution not shown, and performs the discrimination process of the banknote P conveyed by the banknote conveyance path which is not shown in figure.

2 is a reference roller, and both ends thereof are rotatably driven by a drive mechanism (not shown) which is rotatably supported by a bearing 3 fixed to a frame of the medium thickness detecting device 1.

Here, FIG. 3 is a perspective view which shows a movable roller.

4 is a movable roller, and as shown in Fig. 2, two concave portions are formed at positions of the point object based on the cylinder by cutting one quarter of the cross section which is circular in both ends along the axial direction. As a result, concave portions and concave portions (hereinafter, referred to as convex portions) are alternately formed at both ends.

5 is a shaft, which is disposed in parallel with the axis of rotation of the reference roller 2, and both ends thereof are rotatably supported by the bearing of the frame of the medium thickness detecting device 1.

Said movable roller 4 is attached to the shaft 5 through the elastic body 6 of an elastic material, so that a convex part may be fitted to the recessed part of the edge part, and it attaches in multiple numbers, and adjacent movable roller 4 overlaps with each other. Are listed.

Moreover, the movable roller 4 has a structure which rotates in synchronization with the shaft 5, and is pressed by the reference roller 2 by the elastic force of the elastic body 6, and moves along with the reference roller 2, and the reference roller 2 When the banknote is sandwiched between), the elastic body 6 is bent and it can be lifted by the thickness of the banknote.

10 is a gap sensor, which is a non-contact displacement sensor, which is provided above the movable roller 4 and is displaced by the thickness of the banknote which is lifted by the thickness of the banknote sandwiched between the reference roller 2 and the movable roller 4. Detect.

4 is a block diagram showing a medium thickness detection device.

In FIG. 4, 15 is a control part, and each part of the medium thickness detection apparatus 1 is controlled in accordance with the control program stored in the memory | storage part 16, and a banknote judgment process etc. of a banknote are performed.

16 is a memory | storage part, not only stores the control program which the control part 15 performs, the displacement detection process program which performs the displacement detection process of the movable roller 4, but also stores the process result by the control part 15, etc.

In addition, when the banknote is sandwiched between the reference roller 2 and the movable roller 4 in the storage unit 16, the judgment value of the displacement of the gap sensor 10 for determining that foreign matter is attached to the banknote (paper banknote). In excess of the thickness of, a value within the range of less than the thickness when the tape T is pasted on the banknote.) Is stored.

The operation of the above-described configuration will be described.

Fig. 5 is an output waveform diagram showing the displacement of the movable roller until the banknote in a normal state passes, and Fig. 6 is an output waveform diagram showing the displacement of the movable roller until the banknote with foreign matter passes.

When the banknote conveyed by the banknote conveyance path which is not shown in figure is sandwiched between the rotating reference roller 2 and the movable roller 4, the movable roller 4 raises and displaces according to the thickness of the banknote.

Here, as shown in FIG. 5, the movable roller 4 which pinched the place in which the foreign material, such as a tape, is not attached to a banknote is displaced by the thickness of a banknote.

On the other hand, when a banknote with foreign matter is inserted, as shown in FIG. 6, the displacement of the movable roller 4 sandwiches a banknote with the reference roller 2 and the movable roller 4, and the location with the foreign matter attached to it. When the movable roller rises, the displacement of the movable roller 4 exceeds the determined value, and when the movable roller 4 exceeds the portion to which the foreign matter is attached, the displacement becomes lower than the determined value. Recognizing this, the control unit 15 determines that the bill is handwritten.

In addition, in the case where the position of the foreign matter adhered to the banknote is a portion that becomes the recess of the movable roller 4, the output waveform may shift by the thickness of the banknote at the position where the foreign matter does not rise in the recess of the movable roller 4. Although only the convex part of the adjacent movable roller 4 which fits in the recessed part rises in a foreign material.

Here, FIG. 7: is explanatory drawing which shows the foreign material detection area | region by the gap sensor when there exists a foreign material between movable rollers, (a) shows the detection area of the foreign material in gap sensor 10a, (b) is a gap sensor The detection area of the foreign matter in 10b is shown.

Fig. 8 is an output waveform diagram showing the amount of displacement due to the detection of the foreign matter when there is foreign matter between the movable rollers, (a) shows the amount of displacement due to the detection of the foreign matter in the gap sensor 10a, and (b) the gap sensor 10b. The displacement amount by detecting the foreign matter is shown.

Here, in order to distinguish the gap sensor 10 which detects the displacement of each movable roller 4 when there exists a foreign material between the movable rollers 4, it demonstrates by giving a or b as an identifier.

In FIG. 7A and FIG. 7B, the part shown with the diagonal line has shown the undetectable area | region which cannot output a foreign material and cannot detect a foreign material based on the output result of gap sensor 10a, 10b.

When the movable roller 4 at the start of banknote detection starts to avoid foreign matters when the recess is rotated so as to overlap the foreign matter, as shown in FIG. 7A, initially, the undetectable area A in which the output of the foreign matter does not come out is rotated as it is. When the convex part is placed on the foreign material, the detection area B where the output of the foreign material comes out, and when the convex part is separated from the foreign material and the concave part overlaps the foreign material, the undetectable area C which does not come out of the foreign material In order to be the detection area D, the detection area where the output of the foreign matter is output and the detection non-detection area that do not come out alternately appear.

Therefore, as shown in Fig. 8A, the output waveform diagram of the gap sensor 10a in this case shows that when the convex portion is separated from the foreign matter and the concave portion overlaps with the foreign matter, the output of the foreign matter does not come out. In the area corresponding to the non-detectable area C, the waveform is displaced by the thickness of the banknote, and in the areas corresponding to the detection area B and the detection area D where the output of the foreign material comes out when the convex part is placed on the foreign material, the displacement is applied to the thickness of the foreign material. Will appear, and no foreign matter can be detected at all.

On the other hand, in the adjacent movable roller 4, since the convex part rises in foreign matter initially in reverse with the above, as shown in FIG. 7B, the detection area A 'which outputs foreign matter first comes out, and the output of foreign matter comes out next. Non-detectable area B ', detection area C' through which foreign material is output, and detection area D 'without foreign material's output, and the detection area and the non-detection area are rotated in reverse with the state shown in FIG. 7A. Appears.

Therefore, as shown in Fig. 8B, the output waveform diagram of the gap sensor 10b is obtained by adding the thickness of the foreign matter in the area corresponding to the detection area A 'in which the output of the first foreign matter emerges and the detection area C' in which the output of the foreign matter emerges thereafter. Displacement appears, and at the point corresponding to the undetectable areas B 'and D' where the output of the foreign substance does not come out, the displacement as much as the thickness of the banknote appears, and the position where the displacement of the foreign substance appears in comparison with the output waveform shown in FIG. 8A. Appears in reverse rotation.

By the above, even if one movable roller 4 avoids a foreign material by the recessed part, since the convex part of the other movable roller 4 which adjoins so that it may fit in the recessed part will rise to foreign matter, It is possible to detect foreign matter in any position.

Next, the magnitude | size of the displacement in the state where one side of the movable roller 4 climbed to the foreign matter partly climbed is demonstrated compared with the displacement when the roller used conventionally climbed one side.

9 is a dimension comparison diagram of a conventional roller and a movable roller, (a) shows a conventional roller, and (b) shows a movable roller.

The length of both ends parallel to the rotating shaft of the conventional roller is set to L shown in (a), and the length of both ends parallel to the rotating shaft between the recesses of the movable roller 4 is set to L shown in (b).

In addition, the length between the recessed part and the convex part of the edge part of the movable roller 4 shall be a shown to (b).

It is explanatory drawing which compared the displacement in the state which climbed one side to the foreign material, (a) shows the case of the conventional roller, and (b) shows the case of a movable roller.

Here, the thickness of the foreign matter is t, and it is assumed that both the conventional roller and the movable roller 4 ride on one side of the foreign matter at a position separated by X from the center.

In the above state, the displacement Δg0 when the conventional roller is lifted on one side,

[1]

식 1

Equation 1

(Δ represents delta)

On the other hand, the displacement Δg when the movable roller 4 of the present invention is riding on one side,

[Number 2]

식 2

Equation 2

And the difference between the displacement Δg and the displacement Δg0,

[Number 3]

식 3

Expression 3

It can be represented as However, L, a, X and t shall be greater than zero.

From Equation 3, it becomes clear that the displacement in the case of providing the movable roller 4 becomes larger than the displacement in the conventional roller.

As described above, in the present embodiment, even when foreign matter adhering to the banknote passes between the movable rollers, the recesses and the convex portions of the adjacent movable rollers are overlapped so as to be fitted together so that the movable parts are overlapped. Even if the concave portion of the roller overlaps with the foreign matter, the convex portions of the adjacent movable rollers sit on the foreign matter, so that foreign matter can be detected reliably.

In addition, since a row of movable rollers facing the reference rollers reliably sits on the foreign matter attached to the banknote, there is no need to install another roller row in parallel as in the prior art, thereby reducing the mounting space and miniaturizing the medium thickness detection device. You can get the effect of being able to.

In addition, since the displacement when the movable roller gets on one side of the foreign matter becomes larger than the displacement of the conventional roller, the accuracy of the foreign matter detection can be further improved.

In addition, although this example demonstrated the banknote as an example, the same effect can be acquired even if it uses not only a banknote but also used for media, such as securities, such as a check, OCR paper, and printer paper.

In addition, when the foreign matter adhering to the banknote is located in the gap between the concave portion and the convex portion of the adjacent movable roller, the foreign matter cannot be detected if the length of the foreign matter is shorter than the concave portion in the conveying direction of the banknote. Therefore, in the first embodiment, the size of the concave portion and the convex portion formed by cutting both ends of the movable roller was described as one fourth of the distal surface, but not limited to this, the size of one eighth of the cross section. By increasing the number of the concave portion and the convex portion such as alternately providing the concave portion and the convex portion, it is possible to obtain an effect of detecting finer foreign matter.

In addition, although the case where a plurality of movable rollers were opposed to one reference roller was described as an example in the said Example 1, you may provide a plurality of reference rollers, and in this case, the recessed part and convex of the same shape as a movable roller were formed in the reference roller. By providing a portion so that the concave portions and the convex portions of adjacent reference rollers are fitted together, and the foreign matters attached to the banknote pass through the reference rollers securely, even if the reference rollers are in contact with the foreign matters, the same effect as described above is obtained. Can be.

In addition, since adjacent movable rollers may have a shape overlapping with each other, as shown in FIG. 11, the same effects as described above can be obtained even when the concave and convex portions are formed to have a wave shape.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows the medium thickness detection apparatus of Example 1. FIG.

Fig. 2 is a side view showing the medium thickness detecting device of Example 1;

3 is a perspective view showing a movable roller;

4 is a block diagram showing a medium thickness detection device.

The output waveform figure which shows the displacement of the movable roller until the banknote of a normal state passes.

Fig. 6 is an output waveform diagram showing the displacement of the movable roller until the banknote with foreign matter passes therethrough.

7 is an explanatory diagram showing a foreign matter detection region of a gap sensor when there is foreign matter between movable rollers;

8 is an output waveform diagram when foreign matter is present between movable rollers.

9 is a dimension comparison diagram of a conventional roller and a movable roller.

10 is an explanatory diagram comparing displacement in a state where one side is lifted on a foreign matter;

Explanatory drawing which shows the example of another shape of a movable roller.

[Description of the code]

1: Medium Thickness Detecting Device 2: Reference Roller

3: bearing 4: movable roller

5: shaft 6: elastic body

10: gap sensor 15: control unit

16: memory

Claims (2)

Detects displacement of the movable roller disposed side by side in the axial direction of the reference roller to convey the banknote between the reference roller and the reference roller, and the displacement of the movable roller when the two rollers sandwich the banknote. A medium thickness detecting apparatus having a detecting means, Both ends of the movable rollers are cut out to alternately form concave portions and convex portions in the main surface direction, A media thickness detecting device characterized by arranging the concave portions and the convex portions of adjacent movable rollers to fit with each other. The method of claim 1, At least one of said reference rollers, and a plurality of the movable rollers are arranged facing one reference roller, characterized in that the medium thickness detecting device.

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