WO2014114056A1

WO2014114056A1 - Magnetic levitation-type sheet medium thickness detection device

Info

Publication number: WO2014114056A1
Application number: PCT/CN2013/078651
Authority: WO
Inventors: 赵勇; 黄鹤翔
Original assignee: 广州广电运通金融电子股份有限公司
Priority date: 2013-01-23
Filing date: 2013-07-02
Publication date: 2014-07-31
Also published as: CN103136840A; CN103136840B

Abstract

A magnetic levitation-type sheet medium thickness detection device, comprising: a fixing bracket, which is provided with a pair of mounting side walls (012) and a base plate (011), the base plate (011) being provided thereon with an accommodation slotted hole (0121); a reference shaft (02), with two ends thereof being mounted on the pair of mounting side walls (012) of the fixing bracket via bearings, the reference shaft (02) being fixedly sleeved thereon with a reference roll (021); a detection idle pulley mechanism, which comprises a support (031), the support (031) being mounted thereon with an idle pulley (033) via a bearing (032), the surface of one side of the support (031) opposite to an idle pulley (033) being fixedly provided with a magnetic element (034) thereon, and the detection idle pulley mechanism being freely arranged in the accommodation slotted hole (0121) of the fixing bracket; an elastic package plate (04), which is fixedly mounted on the base plate (011) of the fixing bracket, packages the detection idle pulley mechanism into the accommodation slotted hole (0121), and provides an elastic force of being maintained close to the reference roll (021) for the idle pulley (033), the elastic package plate (04) being provided with a magnetic permeation hole (041) in a position corresponding to the magnetic element (034) in the detection idle pulley mechanism; and a magnetic inductor fixed on the fixing bracket opposite to the magnetic permeation hole (041) and used for detecting the displacement of the magnetic element (034) in a noncontact manner.

Description

Magnetic floating type sheet medium thickness detecting device

The present application claims priority to Chinese Patent Application No. 201310025303.4, entitled "Magnetic Floating Sheet Medium Thickness Detecting Device", filed on January 23, 2013, the entire contents of which are incorporated herein by reference. In this application. Technical field

The present invention relates to a device for metering thickness, and more particularly to a magnetic floating thickness detecting device for detecting the thickness of a sheet-like document in a financial self-service device. Background technique

In the financial self-service device, in order to inspect each of the sheet-type value documents (such as banknotes) processed in batches one by one, it is necessary to separate the stacked sheet-type value documents one by one, and then separate the separated sheets. The value document carries out identification methods such as image recognition, thickness detection, and magnetic information detection to ensure the authenticity of the processed value documents. The thickness detection is indispensable in the whole inspection, and the thickness detection information can be used. To judge the authenticity of the processed value documents of the sheet, it is also possible to determine whether the mechanically separated sheet-like value document is a sheet, that is, whether it is a heavy bill to ensure the accuracy of counting.

At present, there are many methods for thickness detection of sheet-like value documents. Among them, the Hall sensor is used as a detection unit because of its high sensitivity, and as shown in FIG. 1 and FIG. 2, the Hall sensor is currently used. a thickness detecting device as a detecting unit, comprising a fixing frame 7 in which the reference axis 1 and the detecting shaft 3 are opposed in parallel in the fixing frame, and the reference shaft 1 is fixedly provided with a reference roller 2 on the detecting shaft 3 Detecting that one end has a free rotation about the detection axis 3 The roller base 4 is provided with a detecting roller 6 at the free end of each detecting roller base 4, in order to make the detecting roller 6 on the free end always approach the reference roller 2, in the detecting roller base 4 and the fixing frame A torsion spring 5 is disposed between the two ends of the torsion spring 5, respectively, on the detecting roller base 4 and the fixing frame 1 for providing a pressing force to the reference roller 2 in the direction of the free end of the detecting roller base 4, each detecting A magnet 8 is disposed on a side of the roller base 4 facing away from the detecting roller 6, and a Hall sensor 9 is disposed on the fixing frame 1 corresponding to each of the magnets 8. When the sheet-like value document passes between the reference roller 2 and the detecting roller 6, the detecting roller 6 is lifted together with the detecting roller base 4, and the Hall sensor 9 determines the magnet by the detected change in the magnetic flux from the magnet 8. 8 The upward floating displacement determines the thickness of the sheet-like value document. When the detection is ended, the detecting roller 6 together with the detecting roller base 4 is quickly reset by the torsion spring 5.

The Hall sensor determines the change in displacement between the magnet and the Hall sensor by sensing the change in the magnetic flux of the magnet. The magnetic floating thickness detecting device of the prior art detects the thickness of the passing medium by detecting the change of the magnetic flux by the rotation of the magnet 8 around the shaft 3. In this way, the parts of the whole detecting device are numerous, and the installation and maintenance are complicated. Further, in the case of wear and the like of the rotating shaft 3 during use, there is a gap between the detecting roller base 4 and the detecting shaft 2, thereby causing the detecting roller base 4 to swing side to side, and detecting the roller base 4 and the detecting shaft 2 Although it is restrained by the snap spring, it still causes the detecting roller base 4 to be displaced in the axial direction of the detecting shaft 2. Due to the high sensitivity of the Hall sensor, small changes in magnetic flux can be detected. For example, suppose that the interval in which the detecting roller base 4 is shaken left and right is +/- Τ, and the magnetic flux change value thereof is -Α 2; the distance between the Hall sensor 9 and the magnet 8 is L1 at the detecting roller base 4 In the case where the left and right swing does not occur, when the sheet-like value document passes between the reference roller 2 and the detecting roller 6, the change in the magnetic flux corresponding to the distance between the Hall sensor 9 and the magnet 8 is L2 Jit is Δ. Φ 1. When the sheet-like value document passes between the detecting roller 6 and the reference roller 2, the detecting roller 6 is lifted up and left and right offset with the detecting roller base 4, and the offset amount is T, and the corresponding magnetic flux change value is A 0 3=A 0 1 + ( ) =A 0 1 -A 0 2 . Then, when Δ 0 3=0, the Hall sensor 9 cannot sense the value of the sheet-like document thickness; when A 0 3>O, the thickness of the sheet-like document detected by the Hall sensor 9 It is smaller than the thickness value of the normal sheet type value document; when ^ φ 3<0, the sensor will report that the detected sheet-like value file is negative.

Obviously, the existing magnetic floating thickness detecting device has a large number of components, a complicated mechanism, and the inevitable mechanical wear during the rotation of the detecting wheel may cause the thickness detecting device to fail to correctly pass through the sheet. The thickness value of the document, resulting in an inaccuracy of the detecting device, is therefore necessary to find a solution to the above technical drawbacks. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and reliable magnetic floating sheet-like medium thickness detecting device which completely changes the maglev mode while reducing components.

The magnetic floating type sheet medium thickness detecting device comprises:

a fixing frame having a pair of mounting side walls and a substrate, wherein the substrate is provided with a slot; a reference shaft, the two ends of which are mounted on a pair of mounting side walls of the mounting bracket by bearings, the reference shaft The upper fixed sleeve is connected with a reference roller;

A detecting idler mechanism includes a bracket on which an idler is mounted through a bearing, and a magnetic component is fixed on a side surface of the bracket opposite to the idler, and the detecting idler mechanism is freely placed in the mounting groove of the fixing bracket Inside the hole

An elastic packaging board fixedly mounted on the substrate of the fixing frame to package the detecting idler mechanism Providing an elastic force for holding the idler wheel close to the reference roller in the slot, the elastic packaging board is provided with a magnetic flux hole corresponding to the position of the magnetic component in the detecting idler mechanism; and being fixed opposite to the magnetic flux hole A magnetic sensor on the mount for detecting the amount of displacement of the magnet in a non-contact manner.

Preferably, the number of idlers mounted on the bracket in the detecting idler mechanism by bearings is two. Preferably, the detecting idler mechanism further comprises a dusting blade that scrapes against the surface of the idler to scrape the surface of the dust during the rotation thereof.

Preferably, at least two placement slots are provided on the base of the mounting bracket, and a detecting idler mechanism is freely placed in each of the placement slots.

Preferably, the magnetic permeability hole of the elastic packaging board is provided with a spring piece that clamps the detecting idler mechanism. Further, the elastic piece is a pair of elastic arms extending from the magnetic flux hole to the detecting idler mechanism. Preferably, a guiding front plate is disposed between the reference shaft and the substrate of the fixing frame, and a through hole is disposed thereon, and the reference roller is selectively in contact with the idler through the through hole.

Further, a side of the fixing frame facing the guiding front plate is provided with a movable guiding rear plate, and the guiding rear plate is rotatably disposed on the mounting side wall by a rotating shaft, and the guiding rear plate is adhered to the substrate through a torsion spring. .

Further, a side of the guiding rear plate that is attached to the substrate is provided with a recess partially accommodating the idler.

Further, the guiding rear plate is two upper and lower blocks, which are respectively disposed at two ends of the substrate and sandwich the substrate.

The magnetic floating type sheet medium thickness detecting device has the following advantages compared with the prior art.

1. By detecting the idler mechanism independently and freely, instead of detecting the idler around the axis, It effectively solves the technical problem of unreliable magnetic detection caused by the rotation of the shaft, and the components are simplified, making assembly and maintenance replacement more convenient.

2. Through the design of the movable guide plate, when the jam occurs in the thickness detecting device, the jammed medium can be completely exposed without disassembling the reference shaft, and the effective removal of the jammed medium is facilitated. DRAWINGS

1 is a schematic structural view of a conventional sheet-like medium thickness detecting device;

2 is a schematic side view of a conventional sheet-like medium thickness detecting device;

3 is a schematic view of a magnetic floating type sheet medium thickness detecting device provided by the present invention; FIG. 4 is an exploded view of the magnetic floating type sheet medium thickness detecting device shown in FIG. 3; FIG. 5 is a magnetic floating type sheet medium shown in FIG. A schematic diagram of detecting an idler mechanism in the thickness detecting device;

Figure 6 is a front elevational view of the magnetic floating sheet-like medium thickness detecting device of Figure 3; Figure 7 is a cross-sectional view of the magnetic floating sheet-like medium thickness detecting device of Figure 6 taken along line AA; Figure 8 is a magnetic floating sheet of Figure 4. BB cross-sectional view of the medium-like medium thickness detecting device; FIG. 9 is a schematic exploded view of the magnetic floating-type sheet medium thickness detecting device shown in FIG.

Figure 10 is a schematic view showing the assembly of the guiding rear plate and the fixing frame in the magnetic floating type sheet medium thickness detecting device shown in Figure 9;

Figure 11 is a cross-sectional view of the rear plate and the fixing frame shown in Figure 10; Figure 12 is a cross-sectional view of the magnetic floating sheet medium thickness detecting device shown in Figure 9; FIG. 13 is a schematic view showing the opening of the guide rear plate when the magnetic floating type sheet medium thickness detecting device shown in FIG. 9 clears the jam. detailed description

To further illustrate such a sheet-like medium thickness detecting apparatus provided by the present invention, a further detailed description will be made in conjunction with the drawings of a preferred embodiment of the present invention.

Referring to FIG. 3 and FIG. 4, a preferred magnetic floating type sheet medium thickness detecting device provided by the present invention comprises: a mounting and carrying member fixing frame 01 having a pair of mounting side walls 01 1 and a substrate 012, the substrate 012 is provided with a slot 0121; - a reference shaft 02, the two ends of which are mounted on a pair of mounting side walls 01 1 of the mounting frame 01 by bearings, the reference axis 02 The fixed sleeve is provided with a reference roller 021; a detecting idler mechanism 03 includes a bracket 031, and the bracket 031 has an idler pulley 033 through a bearing 032, and a magnetic element 034 is fixed on a side surface of the bracket 031 opposite to the idler gear 033 The detecting idler mechanism 03 is freely placed in the receiving slot 0121 of the mounting frame 01; and an elastic packaging board 04 is fixedly mounted on the substrate 012 of the mounting frame 01, and the detecting idler mechanism 03 is packaged and placed. In the slot 0121, and providing the idler 033 with an elastic force close to the reference roller 021, the elastic package board 04 is provided with a transparent hole 041 corresponding to the position of the magnetic element 034 in the detecting idler mechanism 03; and the pair of the transparent hole 041 Fixed on the fixed frame 01 for non-connection Detecting the magnet displacement amount embodiment the magnetic sensor 05, the magnetic sensor 05 via a line with the data processing unit (not shown) electrically coupled, the data processing unit with information for the magnetic sensor 05 acquired for processing. In this embodiment, the magnetic floating type sheet medium thickness detecting device for detecting the full-width thickness of the sheet medium, wherein the detecting idler mechanism 03 is 12, juxtaposed along the conveying direction perpendicular to the sheet medium. Placed. Of course, according to the design requirements, the detection idler mechanism 03 can be increased or decreased. In theory, the more the idler mechanism 03 is set in a certain width range, the finer the thickness detection of the passing sheet-like medium, and the financial equipment pair passes. The more accurate the discrimination of the medium is.

As shown in FIG. 5, the idler 033 mounted on the bracket 031 of the detecting idler mechanism 03 is mounted by two bearings, and a scraping piece 035 is further disposed on the bracket 031, and the scraping piece 035 is scraped against the idler. The surface of 033 scrapes off the surface dust during its rotation.

As shown in FIGS. 6, 7, and 8, in order to ensure that the relative position of the magnetic member 034 in the detecting idler mechanism 03 and the magnetically permeable hole 041 on the elastic package board 04 is stable, the magnetic flux hole 041 of the elastic packaging board 04 is provided with a clip. The elastic piece 042 of the detecting idle gear mechanism 03 is a pair of elastic arms extending from the magnetic flux hole to the detecting idle gear mechanism.

Referring to FIGS. 4 and 9, in order to enable the detected sheet-like medium to smoothly pass the gap formed between the reference roller 021 and the idler pulley 033, the magnetic floating sheet-like medium thickness detecting device includes a guiding front plate 06, which The guiding front plate 06 is placed between the reference axis 02 and the substrate 012 of the holder 01, and is provided with a through hole through which the reference roller 021 is selectively in contact with the idler gear 033.

Referring to FIG. 10 and FIG. 11 , a side of the fixing frame 01 facing the guiding front plate 06 is provided with a movable guiding rear plate 07 , and the guiding rear plate 07 is rotatably disposed on the mounting side wall 01 1 through the rotating shaft 071, and The guiding rear plate 07 is adhered to the substrate 012 by a torsion spring 072, and a groove 073 partially accommodating the idler is disposed on the side of the guiding rear plate 07 that is attached to the substrate 012. Preferably, the guiding rear plate 07 is two upper and lower blocks, which are respectively disposed at two ends of the substrate 012 and sandwich the substrate.

Referring to Fig. 12, when the thickness detecting device is normally used, the detected sheet-like medium P is fed between the guide plates 06 and 07 at a high speed, due to the pressing action of the medium P, at the reference roller 021. In the case of no movement, the detecting idler mechanism 03 is pressed against the detected sheet-like medium, and the displacement toward the reference roller 021 occurs. When the detecting idler mechanism 03 is displaced, the detection of the idler mechanism 03 is performed. The distance between the magnetic element 034 and the magnetic sensor 05 is changed, so that the relative displacement value between the detecting idler mechanism and the reference roller is obtained by the change of the magnetic flux obtained by the data processing unit to the magnetic sensor 05, thereby obtaining the detected sheet indirectly. The thickness of the media. Since the detected sheet-like medium is fed at a high speed, and the detecting idler is a plurality of groups, there is a certain gap between each group, and the existence of these gaps causes the high-speed passing sheet-like medium to be in the reference due to the folding angle or the like. A jam occurs at the roller 021 and the substrate 012. When the cleaning occurs, the guiding rear plate 07 can be rotated around the shaft 071 to open, as shown in FIG. 13, which is convenient for completely removing the jammed medium, and avoiding the detecting device. Disassembly.

The above is only a preferred embodiment of the present invention, and it should be noted that the above-described preferred embodiments are not to be construed as limiting the scope of the invention, and the scope of the invention should be defined by the scope of the claims. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and scope of the invention.

Claims

Rights request

1. A magnetically levitated sheet medium thickness detection device, which includes:

A fixed frame, which has a pair of mounting side walls and a base plate, the base plate is provided with placement slots; a reference shaft, the two ends of which are installed on the pair of mounting side walls of the fixed frame through bearings, the reference shaft The upper fixed sleeve is connected with a reference roller;

An idler detection mechanism, which includes a bracket. The idler is installed on the bracket through a bearing. A magnetic element is fixed on the surface of the bracket opposite to the idler. The idler detection mechanism is freely placed in the placement slot of the fixed frame. inside the hole;

An elastic packaging plate, which is fixedly installed on the base plate of the fixed frame, encapsulates the detection idler mechanism in the placement slot, and provides the elastic force for the idler to keep close to the reference roller. The elastic packaging plate corresponds to the detection idler mechanism. A magnetic permeable hole is provided at the position of the magnetic element; and a magnetic sensor fixed on the fixed frame opposite to the magnetic permeable hole is used to detect the displacement of the magnet in a non-contact manner.

2. The magnetically levitated sheet medium thickness detection device as claimed in claim 1, characterized in that there are two idlers installed through bearings on the bracket in the detection idler mechanism.

3. The magnetically levitating sheet medium thickness detection device as claimed in claim 1, wherein the detection idler mechanism further includes a dust scraper, which scrapes against the surface of the idler during its rotation. Scrape away accumulated dust from the surface.

4. The magnetically levitating sheet medium thickness detection device as claimed in claim 1, wherein at least two placement slots are provided on the base plate of the fixing frame, and one can be freely placed in each placement slot. Check the idler gear mechanism.

5. The magnetic floating sheet medium thickness detection device according to claim 1, characterized in that the magnetic permeable hole of the elastic packaging plate is provided with an elastic piece that clamps the detection idler mechanism.

6. The magnetic floating sheet medium thickness detection device as claimed in claim 5, characterized in that The elastic piece is a pair of elastic arms extending from the magnetic hole to the detecting idler mechanism.

7. The magnetically levitated sheet medium thickness detection device as claimed in claim 1, further comprising a guide front plate placed between the reference shaft and the base plate of the fixing frame, with a transparent plate provided on it. hole, the reference roller selectively contacts the idler wheel through the through hole.

8. The magnetic floating sheet medium thickness detection device as claimed in claim Ί, wherein the side of the fixed frame facing the guide front plate is provided with a movable guide back plate, and the guide back plate is rotated by a rotating shaft and is installed on the mounting surface. on the side wall, and a torsion spring is used to keep the guide back plate and the base plate in contact.

9. The magnetically levitated sheet medium thickness detection device as claimed in claim 8, characterized in that a groove for partially accommodating an idler wheel is provided on the side of the guide rear plate that is in contact with the base plate.

10. The magnetic levitation thin-film medium thickness detection device according to claim 7 or 8, characterized in that the guide back plate is composed of two upper and lower plates, which are respectively provided at both ends of the base plate and surround and clamp the base plate.