JPS59226987A - Magnetic detector for sheet papers - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a paper sheet that detects the amount of magnetism of paper sheets, the right front side of magnetism, etc., which is used in automatic transaction devices that handle paper sheets, sorting and stacking devices, etc. related to magnetic detection devices of the same type.

[Technical background of the invention and its problems 1 Magnetic detection devices that detect magnetic suspension of banknotes in automatic transaction machines, sorting and stacking machines, etc. that handle paper sheets, for example,
A magnetic sensor is provided in the banknote conveyance path, and there is a suppression 4 for bringing the banknote into close contact with the magnetic sensor, so that the banknote is conveyed while being brought into close contact with the magnetic sensor. In such a magnetic detection device, the close contact of the banknote to the magnetic sensor becomes a resistance to the banknote conveyance, which may cause jamming or skew of the banknote, resulting in poor conveyance. Therefore, as a technique for facilitating the conveyance of banknotes, conventionally, at least one
A conveyance mechanism equipped with a navy blue conveyance roller, and a mechanism equipped with a presser roller rotationally driven as a pressing force ttm have been proposed.

By the way, in order to prevent noise from entering the magnetic sensor 1, the presser roller was constructed of a non-magnetic rubber roller, but since the rubber roller in conventional devices has an adhesive surface, it has been used to press and convey banknotes for many years. There is a problem in that when the banknotes are exposed to the paper, magnetic ink, etc. on the banknotes is transferred to the surface of the presser roller, and as a result, the magnetic sensor is likely to cause false detection.Furthermore, the shaft of the presser roller is made of a non-magnetic material. Conventionally, the shaft was 5US304 or 5US30 because it is necessary to prevent adverse effects on the magnetic sensor.
Austenitic stainless steel materials such as No. 3 were used, but there was a problem in that the magnetic permeability changed due to machining, and as a result, it became magnetic and affected the magnetic sensor.

[Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to transport paper sheets while ensuring that they are in close contact with a magnetic sensor using a presser roller that has a relatively simple configuration. paper sheets that can prevent the presser roller from becoming dirty due to contact with paper sheets, and can further improve the reliability of magnetic detection by minimizing the influence of noise etc. on the magnetic sensor. An object of the present invention is to provide a magnetic detection device of the same type.

[Summary of the Invention] In order to achieve the above object, the present invention provides a non-adhesive surface of a non-magnetic presser roller for pressing paper sheets to a magnetic hinger to bring them into close contact with each other, and magnetic ink on the surface of the paper sheets. It is designed to prevent stains caused by multiple items such as clothes.

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

Fig. 1 shows an external view of a device according to an embodiment of the present invention, Fig. 2 is a schematic explanatory view showing the internal mechanism of the device, Fig. 3 is a schematic explanatory view showing the inside of the inspection section inside the device, and Fig. 3 is a schematic explanatory view showing the internal mechanism of the device. FIG. 4 is an explanatory diagram showing the magnetic detection section in the inspection department. In J5, an example of a paper sheet will be described using a device that has functions such as a function of classifying the fitness of banknotes, a counting function, a function of sorting denominations, a function of sorting front and back sides, and the like.

As shown in FIG. 1, the external configuration of this device includes an operation section 1 for specifying an operation mode, and a display section 2 for displaying a display based on the specified operation mode, which are provided at the top of a frame 3. On the sides of the operation section 1 and the display section 2, there are a first stacking section 5 and a second stacking section 5, which stack banknotes that have been taken out and processed from a banknote takeout section which stores banknotes to be processed and takes them out one by one one by one. The third accumulation section 6 and the third accumulation section 7 are connected to the frame 3.
They are arranged sequentially from above in front of the Note that the banknotes stacked in each of the stacking sections 5, 6.7 can be taken out from the front force 1 of the device. Also, on the side of each stacking section 5.6.7 and in front of the frame 3, there are a first display lamp LP1, a second display lamp LP1, which displays that a predetermined number of banknotes have been stacked in each stacking section. A display lamp L P2 and a third display lamp LP3 are provided.

The internal mechanism of the book 1-table, which has such an external configuration, is shown in FIG. 2. That is, a conveyance section 10 is provided that conveys banknotes sequentially taken out from the banknote takeout section 4 to the first stacking section 5, second stacking section 6, and third stacking section 7. In addition, although this conveyance part 10 is shown as a conveyance path of banknotes in the figure, it has a structure in which banknotes are conveyed while being held by a conveyance belt (not shown), for example. An inspection unit 11 that detects the fitness, denomination, and front and back of the banknotes taken out from the banknote takeout unit 4 and conveyed is disposed opposite to the banknote conveyance path. Then, the first banknotes 1 to 1 switch the banknotes that have passed through the inspection section 11 in the direction of the third stacking section 7 or the stacking section (first stacking section 5, second stacking section 6) thereof. section 12 and this first gate section 1
A second gate section 13 is provided on the banknote conveyance path for switching the banknotes conveyed through the banknotes 2 toward the first stacking section 5 or the second stacking section 6. In addition, both the goo 1 parts 12 and 13 are configured to switch the conveying direction of banknotes by rotating the C gates 12A and 13A using a built-in drive unit (V not shown). The banknote takeout unit 4 has a first unit that detects whether or not banknotes are stacked.
A first counter C that counts the number of bills taken out from the banknote takeout section 4 by 81 is installed.
1 is set. Further, in front of the first stacking section 5, a second counter C2 for counting the number of banknotes conveyed to the first stacking section 5 is provided. A second detector S2 is provided to detect whether or not banknotes are accumulated. Further, in front of the second stacking section 60, there is a counter C3 of 'j53 for counting the number of banknotes conveyed to the second stacking section 6.
is provided, and a third detector S3 for detecting whether or not banknotes are stacked in the second stacking section 6 is also provided. Further, in front of the third stacking section 7, a fourth counter C4 for counting the number of banknotes conveyed to the third stacking section 7 is provided.
A fourth detector S4 is provided to detect whether or not banknotes in the stacking section 7 are stacked.

The inspection section 11 detects the type of grass objects to be sorted and accumulated based on the input from the operation section 1.

Now, the banknote inspection section 11 has a structure as shown in FIG. 3. In the figure, reference numerals 14 and 15 are conveyance guides, and a conveyance path 16 is formed between these guides, through which banknotes 17 are conveyed. A plurality of roller pairs 18 are distributed on the banknote conveyance surface.
a and 18b are used to transport both sides of the banknote with the left and right J and lv in FIG.
9 and J: It is driven via twist belts t-20a, 20b, and 20c, and the banknotes are held and conveyed by the idle rollers 18b. A detector 21 installed in the conveyance path detects the end of the banknote and informs other detection systems of the arrival of the banknote. The optical sensor 22 placed in the transport path 16 is used to optically inspect both sides of the banknote, and detects information that determines whether the banknote is good or bad, the denomination, and whether the banknote is front or back. A magnetic sensor 23 that detects the magnetism of banknotes is installed facing the conveyance path 16 on the way. A wall plate-like shielding member 32 made of a soft magnetic alloy is provided for shielding the induced noise generated by the magnetic flux 19. Examples of the soft magnetic alloy material constituting this shielding member include silicon steel plate,
Ferritic stainless steel, ferrite or permanent carp can be used.

Here, the structure near the magnetic sensor 23 will be explained in detail with reference to FIG. 4. FIG. 4 is an explanatory diagram of the magnetic sensor section viewed from the banknote conveyance direction A.

As shown in Fig. 4, there are two
A plurality of magnetic sensors 23, 23 and a plurality of driven rollers 25 are arranged between them and on both sides, and the magnetic sensor surface and the circumferential surface of the driven rollers facing the conveying surface are parallel to the banknote conveying surface. and are set at approximately the same height.
A shaft 24C pivotally supported by a pair of arms 27 is disposed at a position facing the driven roller 25 across the conveyance path 16. Libeku drive roller 24b
At the same time, a presser roller 24a is attached (pushed) so as to face the magnetic sensor 23. It presses against the magnetic sensor 23 and is rotated in the banknote transport direction, and at least its surface is non-adhesive and non-magnetic.For example, this is a silicone rubber roller or a fluororesin-containing rubber roller. Since the roller 24a is non-magnetic, it will not affect the magnetic sensor 23 even when it rotates, and since it is non-adhesive, magnetic ink or iron powder from banknotes will not adhere to it, preventing false detection by the magnetic sensor. Further, the driven roller 25 and the driving roller 24b are arranged opposite to each other across the conveyance path on both sides of the magnetic sensor in the direction intersecting the conveyance direction of the paper sheets, so that the driven roller 25 and the drive roller 24b can sandwich and convey the paper sheets. This is an example of a pair of nipping and conveying rollers, and is preferably made of rubber having a relatively large coefficient of friction than the presser roller 24a. Even if the frictional conveyance angle of the banknote by 24a is small, the banknote is reliably nipped and conveyed by the driven roller 25 and the driving roller 24b, and jamming and skewing of banknotes on the C' conveyance path 16 can be reliably prevented. The shaft 24C is made of a steel material with little change in magnetic permeability due to machining, such as 5US316.5US310 or 5US, which is A-stenite stainless steel specified by JIS.
308.

Therefore, even if this shaft 24c rotates, it will not affect the magnetic sensor 23. In addition, shaft 24G
The material is not limited to the above materials, but for example, ASK3000USAISI316F manufactured by Akita Steel Works Co., Ltd.
It can be replaced with an austenitic stainless steel equivalent to A-stenitic stainless steel equivalent to the above stainless steel, such as SR8314F or NAS316F,
Furthermore, it is also possible to substitute non-ferrous metal materials such as brass or duralumin.

Further, as shown in FIG. 3, the roller pair 40 consisting of the shaft 24C, drive roller 24b, driven roller 25, and presser roller 24a is rotated by a drive motor 19 via a belt in the same manner as the conveyance roller 18a. It is configured. 14) (The pressing roller 24a and the drive roller 24.b are movable in the thickness direction of the banknote, and for example, as shown in FIG. 3, they pivotably support a shaft 24C. The arm 27 of is the fulcrum 2
6 as the center, and is biased by the spring 28 in the direction of arrow B shown in the third figure, that is, in the direction of pressing against the conveying surface, and resists this force and presses ()
Adjust 11 with the stopper 29 so that the amount can be increased or decreased c'.
J function, and as shown in Figure 4, the driven low'')2
A gap 31 is formed between the magnetic sensor 23 and the drive roller 24b, and a gap 3 is formed between the magnetic sensor 23 and the pressing roller 24a.
-C is adjusted so that 0 is formed. For example, the sizes of the gaps 30 and 31 are approximately the same and are set to 0 or a value smaller than the thickness of the banknotes being conveyed.

When the banknotes are carried into the inspection section 11 as shown in FIG.
4. , 15, the detector 21 detects the arrival of the bill, and the optical sensor 22 and magnetic sensor 23 inspect the bill for its fitness, denomination, front and back, etc., and the bill is released from the inspection section. .

When a banknote is conveyed above the magnetic sensor 23, gaps 30 and 31, which are not shown in FIG. 4 and are set smaller than the thickness of the banknote, are formed.
The bill passes through the inside while pushing up the presser roller 24a and the drive roller 24b against the spring 28. At this time, the bill is conveyed by the rotation of the press roller 24a while being brought into close contact with the magnetic sensor 23 by the press roller 24a urged by the pressing force generated by the spring 28. At the same time, the banknote is transferred to the driving roller 2/I, which is urged by the pressing force generated by the spring 28.
b between the driven roller 25 and the driving roller 2.
It is conveyed by the rotation of 4b. In this way, the pressing roller 24a, the driving roller 24b, and the driven roller 25 can reliably press the banknote against the magnetic sensor 23 and convey it at the same time.

In addition, according to such a presser roller mechanism, when a thick banknote is conveyed, the amount of push up of the presser roller increases, and the pressing force of the presser roller (=J force) on the banknote increases, and the magnetic sensor The pushing of the banknote becomes harder and conveyance resistance increases, but on the other hand, the contact force between the presser roller 24a and drive roller 24b and the banknote becomes stronger, and the conveyance force also increases.
Banknotes can be transported reliably.

Further, the presser roller 24. Since at least the surface of a is non-adhesive and non-magnetic, magnetic ink and iron powder are not deposited on the banknotes during conveyance (they are not deposited on the paper), and are not caused by conventional methods. It is possible to reliably prevent the generation of erroneous signals from the magnetic sensor.Especially in this case, since the friction coefficient of the nipping conveyance roller pair 25.24a is much larger than the 1?Ii9 coefficient of the holding roller 24a, There is no decrease in the conveying force of the banknotes, and there is no possibility of jamming or skewing of banknotes.Furthermore, the sheets 17) 1 to 24-c to which the presser roller 24a is attached are as described above.
These materials are made of 5US316, 5US310, or 5US308, which are ausbunite stainless steels specified in As shown in Figure (a) and Figure 5 (b), which shows the relationship between cold working rate and magnetic permeability at a magnetic field strength of 200 oersted, there is little change in magnetic permeability due to machining, so it is specified in JIS. Compared to when using 5US303 or 5US304, the rotating shaft 24c is
3 can be minimized.

Furthermore, since a shielding member 32 made of a soft magnetic alloy material is provided between the drive motor 19 and the magnetic sensor 23, the induced noise generated by the drive motor 19 can be reliably blocked. , it becomes possible to perform stable magnetic detection without the influence of noise.

It goes without saying that the above-mentioned embodiment is merely an example, and that various modifications can be made within the scope of the gist of the present invention.

For example, in the above embodiment, the presser roller 24a and the drive roller 24b are formed on one shaft 24c to reduce costs, but a special shaft is provided for each day and the paper sheets. It is also possible to configure the rollers so that each roller can independently apply a pressing force to the paper sheets.In particular, if the paper sheets are shifted in this way, there will be considerable unevenness in the thickness of the paper sheets being conveyed. It is possible to prevent this and ensure reliable conveyance. Further, the presser roller 24a is not limited to being non-magnetic and non-adhesive as a whole, but can also be non-magnetic and have at least a non-adhesive surface, such as a normal rubber roller. It can also be constructed by coating the surface with fluororesin-containing rubber.

Further, the shielding member is not limited to the case where it is placed between the drive motor 19 and the magnetic sensor 23, and a similar shielding member is used for all the sources of induced noise that affect the magnetic sensor 23. Is possible.

Further, in the above embodiment, the presser roller is 1 as shown in FIG.
-Adjust the pressure on the conveying surface using the base 1~flange 294-
It was a ljl 4f4, but this S1~Brim 29
Remove the presser roller 28 and remove the magnetic sensor 1.
23d3 and the driven roller, and at this time, the circumferential surfaces of the magnetic sensor and the driven roller shown in FIG. Alternatively, the presser roller 24. The diameter of the roller 24 is made smaller than the diameter of the roller 24b.
By setting the suppression horn generated between the roller 24a and the magnetic sensor 23 to be sufficiently small compared to the pressure generated between the roller 24a and the driven roller 25, one J is applied to the presser roller as in the above embodiment. , it is possible to reliably transport paper sheets while keeping them in close contact with the magnetic sensor.

In this case, if the hardness of the presser roller 24a, which is a non-magnetic elastic body, is made higher than the hardness of the roller 24b, the pressing force generated or increased when the paper sheet pushes up the presser roller and passes through it while being deformed. The rate of change of roller 24
Since there is a person between the press roller 24a and the magnetic sensor 4 no. 1 23 rather than between the paper sheet magnetic sensor 2 and the driven roller 25,
Close contact with 3 can be ensured.

In addition, in the above embodiment, the presser roller can be displaced according to the thickness of the paper sheet, but the presser roller is made of a non-magnetic elastic material, and the paper sheet can be moved by deforming the presser roller itself. If it is possible to absorb variations in the J width of the paper sheet, the structure may be such that the presser roller is fixed so as not to be displaced in the thickness direction of the paper sheet.

[Effects of the Invention] As is clear from the above explanation, the paper sheet magnetic detection device of the present invention has a relatively simple configuration, and the paper sheet can be firmly brought into close contact with the magnetic sensor by the presser roller. The surface of the non-magnetic presser roller used to press the paper sheets against the magnetic sensor V and bring them into close contact with each other is made non-adhesive.
It has excellent effects such as being able to prevent stains caused by adhesion of magnetic ink etc. on the surface of paper sheets, and further improving the reliability of magnetic detection by minimizing the influence of noise etc. on the magnetic sensor. It is something that you have.

[Brief explanation of the drawing]

Fig. 1 is an external view showing one embodiment of the present invention, and Fig. 2 shows the internal mechanism of the device. Fig. 3 is a schematic explanatory diagram showing the inside of the inspection section in the same device, Fig. 4 is a detailed explanatory diagram of the vicinity of the magnetic sensor in the inspection section, and Fig. 5 (a>, (b) shows the magnetic field An explanatory diagram showing the relationship between cold working rate and magnetic permeability at a magnetic field strength of 50 Oersted, and an explanatory diagram showing the relationship between cold working rate and magnetic permeability at a magnetic field strength of 200 Oersted. ...Conveyance path, 17...Paper sheets, 2
3...Magnetic sensor, 24a...Press roller, 24b...Pair of pinching and conveying rollers, 24C...
...Shaft, 25...Pair of clamping and conveying rollers. Agent Patent attorney Noriyuki Chika (and 1 other person) 16 (0) Figure (b)

Claims (7)

[Claims] (1) A magnetic sensor that detects the magnetism of paper sheets is provided facing the conveyance path that covers the conveyance of paper sheets, and a conveyance path is installed on both sides of the magnetic sensor in a direction that intersects the conveyance direction of the paper sheets. A pair of nipping and conveying rollers are disposed opposite to each other and pinch and convey paper sheets, and a pair of nipping and conveying rollers are disposed opposite to the magnetic sensor 9 via a conveyance path and press the conveyed sheets against the magnetic sensor. What is claimed is: 1. A magnetic detection device for paper sheets, comprising a press roller which is rotationally driven in the direction and whose surface is non-adhesive and non-magnetic. (2) The magnetic detection device for paper sheets according to claim 1, wherein the pressing roller is a silicone rubber roller or a rubber roller containing a rubber roller. (3) The paper sheet magnetism detection device according to claim 1, wherein the pair of nipping and conveying rollers has a coefficient of friction (larger than the pressing roller). (4) The paper sheet magnetism detection device according to claim 1, wherein the pair of nipping and conveying rollers and the pressing roller are imprinted on the same shaft. (5) The paper sheet magnetism detection device according to claim 1, wherein the pressing roller is provided on a shaft made of a steel material whose magnetic permeability hardly changes due to machining. (6) Steel material with little change in magnetic permeability is 5tJS316.
5. The magnetic detection device for paper sheets according to claim 5, which is made of 5US310.5US308 or an austenitic stainless steel equivalent thereto. (7) The holding roller is provided on a shaft made of a non-ferrous metal material such as brass or duralumin.