WO2017059673A1

WO2017059673A1 - Thickness detection device for slice medium

Info

Publication number: WO2017059673A1
Application number: PCT/CN2016/081153
Authority: WO
Inventors: 谭栋; 冯能文; 吴红军; 尹广军
Original assignee: 广州广电运通金融电子股份有限公司
Priority date: 2015-10-09
Filing date: 2016-05-05
Publication date: 2017-04-13
Also published as: CN105160755A

Abstract

Disclosed is a thickness detection device for a slice medium. The thickness detection device comprises: a module frame (01) used for installing and carrying the following components; a driving shaft (05), two ends of which are installed on the module frame (01) through a bearing (13); at least one driven wheel assembly (08), which driven wheel assembly (08) comprises a driven wheel (085) and an elastic support (081), one end of the elastic support (081) being fixedly installed on the module frame (01), and the driven wheel (085) being assembled at the other end in a rotating manner to form a free end. An arc spring sheet (16) is arranged on the module frame (01) corresponding to the position of the driven wheel assembly (08). The position, facing away from the driven wheel (085), of the free end of the elastic support (081) is in contact with the arc spring sheet (16) for assembly. A detection block (082) is fixedly installed at one side, facing away from the driven wheel (085), of the elastic support (081). An inductor is fixedly installed on the module frame (01) by being opposite the detection block (082) and is used for detecting a displacement value of the detection block (082) in a non-contact manner.

Description

Sheet medium thickness detecting device

The present application claims priority to the Chinese Patent Office, filed on Oct. 09, 2015, the entire disclosure of which is hereby incorporated by reference.

Technical field

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

Background technique

In the financial self-service equipment, in order to inspect each of the sheet-type value documents (such as banknotes, checks, money orders, etc.) processed in batches, it is necessary to separate the stack of sheet-value documents one by one, and then Separate sheets of valuable documents for image recognition, thickness detection, magnetic information detection, etc., to ensure the authenticity of the processed value documents, wherein the thickness detection of the banknotes is an essential Identification means. At present, the sheet-like valuable documents are generally made into a sheet-shaped medium having a certain thickness characteristic by using special materials. At present, the counterfeit value documents and the spliced value documents are all trying to forge this thickness identification feature to deceive ordinary financial equipment. Detection of this type of identification feature. Therefore, in financial service equipment, reliable identification of the thickness of the document of value is of great significance for the authenticity of the document of value. Therefore, the thickness detection information can be used to determine whether the processed sheet-like value document is authentic or not, and whether the mechanically separated sheet-like value document is a sheet, that is, whether it is a heavy bill, and the self-service financial device is accurately processed. Sex.

At present, the thickness detection of the sheet-like value document is as disclosed in Chinese Patent No. CN104091387A. As shown in FIG. 1, the thickness detecting device is assembled only after the assembly of the driven wheel assembly 04 with the thickness shaft 07. Under the assumption of ideal deformation, the state of the driven wheel assembly 04 is presented, and the actual deformation mode is the state of 04A. As shown in FIG. 2, the contact direction of the driven wheel assembly 04A and the thickness axis 07 is not in the vertical direction. However, there is an inclination angle A with the vertical direction, which affects the effective magnetic flux of the thickness detecting block 074, thereby affecting the performance of the thickness detection. At the same time, the pre-stress of the driven wheel assembly mainly comes from the pre-deformation of the elastic bracket 041, and the elastic bracket 041 is fixed on the fixing bracket 02 by screws to form a cantilever beam structure, and the structure is easy to be fixed when the end is stressed. The end root forms a high bending stress and reduces The fatigue life of the elastic bracket 041.

Summary of the invention

The invention solves the technology that the existing sheet medium thickness detecting device affects the effective magnetic flux of the thickness detecting module due to the fact that the reference axis and the detecting shaft contact direction cannot be effectively maintained in the vertical direction, and the fatigue life of the elastic bracket is low due to the long-term bending stress. The problem is to provide a sheet medium thickness detecting device which can ensure that the driving shaft and the driven wheel are in the vertical direction and can effectively prevent the fatigue life of the elastic bracket from being lowered.

The sheet medium thickness detecting device comprises:

a module frame for mounting and carrying the following components;

a drive shaft, the two ends of which are mounted on the module frame through bearings;

At least one driven wheel assembly, the driven wheel assembly includes a resilient bracket and at least one driven wheel, one end of the resilient bracket is fixedly mounted on the module frame, and the other end is rotatably mounted to form a free end, and the driven wheel is elastically pressed The drive shaft;

Wherein, a position of the driven wheel assembly corresponding to the driven wheel assembly is provided with an arcuate elastic piece, and the free end of the elastic support is pressed against the arcuate elastic piece at a position facing away from the driven wheel, and the elastic support is facing away from the driven wheel. A detecting block is fixedly mounted on the side; and an inductor for opposing the detecting block and fixedly mounted opposite to the module frame for detecting the displacement amount of the detecting block in a non-contact manner.

Preferably, the curved elastic piece is a bridge type double-footed elastic piece which is located on both sides of the detection block and is fixed at both ends to form an arc shape.

Preferably, the curved elastic piece applies a direction of the elastic force applied to the driven wheel assembly, the axis of the driven wheel and the axis of the driving wheel are coplanar in the vertical direction.

Preferably, the curved elastic piece is an arc-shaped member formed by plastic working.

Preferably, the curved elastic piece is a flat member which is assembled and extruded to form an arc.

Preferably, the elastic bracket is an elastic sheet which is rigidly connected to the module frame.

Preferably, the elastic bracket is a rigid component that is hinged to the module frame with a damping medium.

Preferably, the elastic bracket is an elastic sheet hinged to the module frame by using a damping medium.

The sheet medium thickness detecting device has the following advantages compared with the prior art:

The device is provided with an arc-shaped elastic piece to ensure that the driven wheel and the drive shaft remain in vertical contact before Increase the contact damping, effectively improve the impact resistance of the driven wheel assembly, reduce the adverse impact of the medium impact on the thickness detection structure, improve the detection accuracy and detection efficiency; also effectively reduce the stress level of the elastic support and improve its service life.

DRAWINGS

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

Figure 2 is a schematic view showing the structure of the actual working state of the thickness detecting device shown in Figure 1;

3 is a schematic overall view of a sheet medium thickness detecting device provided by the present invention;

Figure 4 is a schematic view showing the assembly relationship of the driven module in the sheet medium thickness detecting device shown in Figure 3;

Figure 5 is a schematic overall view of the driven module shown in Figure 4;

Figure 6 is a schematic view showing the overall assembly relationship of the sheet medium thickness detecting device shown in Figure 3;

Figure 7 is a schematic view showing the assembly of the driven wheel assembly in the driven module shown in Figure 4;

Figure 8 is a schematic view showing the state in which the front and rear driven wheel assemblies of the driving shaft are mounted on the sheet medium thickness detecting device shown in Figure 3;

Figure 9 is a schematic view showing the working state of the sheet medium thickness detecting device shown in Figure 3;

Figure 10 is a schematic view showing the relationship between the working states of the sheet medium thickness detecting device shown in Figure 3;

Fig. 11 is a view showing a comparison of vibration amplitudes of detection results of the conventional sheet medium thickness detecting means and the sheet medium thickness detecting means shown in Fig. 3.

detailed description

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

Referring to FIG. 3, FIG. 4 and FIG. 7, a preferred sheet medium thickness detecting device provided by the present invention comprises: a module frame 01 for mounting and carrying the following components; a driving shaft 05, Both ends are mounted on the module frame 01 by the flange bearing 13, and 12 sets of driven wheel assemblies 08 elastically contacting the drive shaft 05, the 12 sets of driven wheel assemblies 08 are juxtaposed in 12 axes along the axial direction of the drive shaft 05. On the roller. As shown in FIG. 7, the driven wheel assembly 08 includes three sets of driven wheels 085. The driven wheels 085 are combined with a rotating shaft 0084 and a resilient bracket 081 to form a set of driven wheel assemblies 08, a set of driven wheel assemblies 08. Adjacent to two driven wheels 085 There is a spacer spacer 086. One end of the elastic bracket 081 is mounted on the module frame 01 by screws 09, and the other end has two mounting ears for mounting the bearing assembly 083. The module frame 01 corresponds to the driven wheel assembly 08. An arcuate elastic piece 16 is disposed. The free end of the elastic support 081 is elastically pressed against the curved elastic piece 16 at a position facing away from the bearing assembly 083. The elastic support 081 is fixedly mounted on a side facing away from the driven wheel 085. There is a detecting block 082; the corresponding curved elastic piece 16 has a bridge type double-footed elastic piece which is located on both sides of the detecting block and is fixed at both ends to form an arc. The bridge type double-footed elastic piece forms a hole for the detecting block 082 to pass through. And an inductor (not shown) for detecting a displacement amount of the detection block 082 in a non-contact manner, opposite to the detection block 082 and fixedly mounted to the module frame 01. Wherein, the inductor is electrically connected to a data processing unit (not shown) through a wire, and the data processing unit is configured to process information collected by the sensor. In this embodiment, in order to realize the full-width thickness detection of the sheet medium, the driven wheel assembly 08 is selected into 12 groups, and those skilled in the art can increase or decrease the number of the driven wheel assemblies 08 according to the size of the detection medium and the number of detection points. .

Specifically, the elastic bracket 081 of the 12 sets of driven wheel assemblies 08 is deformed after the driving shaft 05 is installed in position. As shown in FIG. 8 and FIG. 9, the pressure generated by the deformation causes the plurality of sets of driven wheel assemblies 08 and the driving shaft. 05 is fitted to form a passage for transporting the banknote 11, and the direction of the force of the driven wheel assembly 08 and the driving shaft 05 is coplanar with the axis of the driven wheel 085 and the driving shaft 05, and the externally transmitted power acts on the power wheel mounted on the driving shaft 05. 03, the driving shaft 05 is rotated, and the driving shaft 05 drives the driven wheel 085 on the driven wheel assembly 08 in contact with the friction wheel to generate the power for transmitting the banknote 11. The signal detecting board 15 is mounted on the module frame 01. As shown in FIG. 4, the block 17 is screwed to the pressing block 017 by screws in the direction of the arrow, and the driven wheel assembly 08 is mounted on the pressing block 017 by screws to form the driven module 18, as shown in the figure. As shown in FIG. 5, after the assembly of the driven module 18 is completed, the curved elastic piece 16 is in a state of compression deformation, and the generated pre-pressure driven wheel 085 is pressed against the driving shaft 05, and the direction of the force of the curved elastic piece 16 on the driven wheel assembly 08 is The axes of the driven wheel 085 and the driving shaft 05 are coplanar to ensure that when the sheet medium enters the thickness detecting device, the driven wheel 085 moves up and down in the vertical direction; the curved elastic piece 16 is mounted on the pressing block 017 and the block 17 The fixing method after the loading may be welding, bonding, riveting, or the like. The curved elastic piece 16 is made of a thin and elastic material, and may be replaced by a rubber block or an elastic element such as a common spring, and the curved state of the curved elastic piece 16 may be generated by plastic working or a flat plate medium. Produced by assembly extrusion. The signal detecting board 15 is screwed by the upper end cover 21 The direction of the arrow is fixed to the driven module 18, and the driven module 18 is finally fixed to the fixed frame 01 by screws in the direction of the arrow, as shown in FIG.

As shown in FIG. 7, the assembly process of the driven wheel assembly 08 is described in detail, and three driven wheels 085 and two pieces of spacers 086 are loaded into the shaft 084 to form a bearing assembly 083; the bearing assembly 083 is loaded into the elastic bracket 081 in the direction 088. The fixing manner after the loading may be welding, bonding, riveting, etc.; the detecting block 082 is loaded on the elastic bracket 081; after the above assembly is completed, the elastic driven wheel assembly 08 is formed. The elastic bracket 081 is made of a thin, elastic material, and the number of the driven wheel 085 and the spacer 086 can be increased or decreased according to design requirements. FIG. 8 is a schematic view showing the state of the driven wheel assembly 08 before and after the driving shaft 05 is mounted. The left figure shows that the driven wheel assembly 08 is mounted on the module frame 01 with the screw 09, and the driving shaft 05 is not yet installed. The right picture shows the state in which the driving shaft 05 is brought into contact with the driven wheel assembly 08 and raised after the driving shaft 05 is loaded. The driven wheel assembly 08 assumes an initial non-deformed state, and the curved elastic piece 16 is pressed and deformed. This deformation causes pressure to be generated at the contact point of the drive shaft 05 and the driven wheel assembly 08.

Next, the working state of the driven wheel assembly 08 in the module will be further described by means of FIG. 9. After the mounted plurality of sets of driven wheel assemblies 08 and the driving shaft 05 are in contact, the pre-deformation of the curved elastic piece 16 leads to the contact position-thickness detecting point. Positive pressure is generated at 060 and forms a passage 062 for transporting the banknote 11. The direction of the passage 062 is determined by the external force 061 acting on the power wheel 03, which may be bidirectional. The driven wheel 083 is in contact with the driving shaft 05 to form a thickness detecting point 060. When the banknote 11 is transported along the path 062, the change in the thickness direction of the banknote 11 is detected by the signal detecting board 15 by the height change of the detecting block 082 when passing through the thickness detecting point 060. Towards, the plurality of sets of driven wheel assemblies 08 can cover the length direction of the banknotes 11, and the entire thickness variation of the banknotes 11 is detected over time, and the signal detecting plate 15 converts the thickness images into an external identification system to process the thickness information of the banknotes. .

As shown in FIG. 10, when the driven wheels 083 on both sides of the driven wheel assembly 08 contact the surface of the drive shaft 05, a force P is generated to lift the driven wheel assembly 08, causing the elastic support 081 to return to the initial undeformed state; The elastic piece 16 is simultaneously subjected to the urging force P from the driven wheel assembly, and is compressed and deformed under the restraining force F of the pressing block to generate a pre-compression force. Due to the above working principle, as shown in FIG. 2, the inclination angle A is absent, and the contact direction of the driven wheel assembly 08 and the driving shaft 05 is vertically upward, and the magnetic flux direction and position are consistent with the design target, and are no longer affected by the assembly; The elastic bracket 081 is no longer prestressed, and is only subjected to a small medium impact lifting force during operation, so that Life expectancy is improved. The curved elastic piece 16 forms a damping dissipation system with the pressing block 15, the block 17 and the driven wheel assembly 08, which can reduce the impact response generated when the medium passes, so that the thickness detection result is more accurate. The comparison between the detection result A of the existing detecting device and the detection result B of the detecting device provided by the present invention is as shown in FIG. 11, and the vibration amplitude Am and the decay time in the detection result of the sheet medium thickness detection provided by the present invention can be seen. The tm has been reduced to a certain extent, and the image performance has been improved.

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 determined by the scope defined by 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

A sheet medium thickness detecting device comprising:

a module frame for mounting and carrying the following components;

a drive shaft, the two ends of which are mounted on the module frame through bearings;

At least one driven wheel assembly, the driven wheel assembly includes a resilient bracket and at least one driven wheel, one end of the resilient bracket is fixedly mounted on the module frame, and the other end is rotatably mounted to form a free end, and the driven wheel is elastically pressed The drive shaft;

The utility model is characterized in that: the position of the module frame corresponding to the driven wheel assembly is provided with a curved elastic piece, and the free end of the elastic support is pressed against the driven elastic wheel to be assembled with the curved elastic piece, and the elastic support is facing away from the driven wheel. A detection block is fixedly mounted on one side; and an inductor for opposing the detection block and fixedly mounted to the module frame for detecting the displacement amount of the detection block in a non-contact manner.
The sheet medium thickness detecting device according to claim 1, wherein the curved elastic piece is a bridge type double-footed elastic piece which is located on both sides of the detecting block and is fixed at both ends to form an arc shape.
The sheet medium thickness detecting device according to claim 1, wherein the direction of the elastic force applied by the curved elastic piece to the driven wheel assembly, the axis of the driven wheel and the axial connection of the driving wheel are parallel .
The sheet medium thickness detecting device according to claim 1, wherein the curved elastic piece is an arc-shaped member formed by plastic working.
The sheet medium thickness detecting device according to claim 1, wherein the curved elastic piece is a flat member which is assembled and extruded to form an arc.
The sheet medium thickness detecting device according to claim 1, wherein the elastic bracket is an elastic sheet that is rigidly attached to the module frame.
The sheet medium thickness detecting apparatus according to claim 1, wherein the elastic bracket is a rigid member hinged to the module frame with a damping medium.
The sheet medium thickness detecting device according to claim 1, wherein the elastic bracket is an elastic sheet hinged to the module frame by a damping medium.