Paper thickness detection device, paper identification device and paper processing device

Abstract

This invention provides a paper thickness detection device, a paper identification device, and a paper processing device. In the paper thickness detection device, while ensuring maintainability, vibrations caused by the impact of paper entering between a reference roller and a detection roller are suppressed to improve the accuracy of paper thickness detection. The paper thickness detection device detects the thickness of paper and includes: a first unit comprising a reference roller; and a second unit comprising a detection roller and a thickness sensor. The detection roller and the reference roller together clamp the paper and are conveyed, and the detection roller is displaced relative to the reference roller according to the thickness of the paper. The thickness sensor detects the thickness of the paper based on the amount of displacement of the detection roller. The first unit and the second unit overlap to form a paper conveying path such that the reference roller and the detection roller clamp the paper, and are assembled to open and close about a rotation axis provided at one end of the conveying path. The second unit has a vibration damping component in the thickness sensor.

Description

Technical Field

[0001] This invention relates to a paper thickness detection device, a paper identification device, and a paper processing device. Background Technology

[0002] Traditionally, automated cash transaction devices such as ATMs (Automatic Teller Machines) and cash dispensing machines (CDs) include banknote recognition devices to identify the type and authenticity of paper banknotes. These banknote recognition devices include a banknote thickness detection device, which determines the denomination, authenticity, and detects banknotes with foreign objects attached based on the thickness detected by the banknote thickness detection device. The banknote thickness detection device includes multiple reference rollers, multiple detection rollers, and multiple displacement sensors. When a banknote is being conveyed and held by the reference rollers and detection rollers, the multiple displacement sensors detect the amount of displacement of the detection rollers according to the banknote thickness, using the reference rollers as a reference.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2014-102719

[0004] In recent years, banknote recognition devices have adopted a modular structure that divides the banknote transport path into upper and lower units, and allows for opening and closing via a rotating axis hinged to one side in the banknote transport direction. The banknote thickness detection device within this structure is also modularized, consisting of multiple reference rollers as lower units and multiple detection rollers as upper units, and can be assembled with an opening and closing mechanism hinged to one side in the banknote transport direction. This openable / closable structure offers the advantage of improved maintainability, preventing banknote jamming between the reference rollers and detection rollers.

[0005] However, in such an openable and closable structure, because the upper unit is less constrained, the vibration of the detection roller caused by the impact of the banknote entering between the reference roller and the detection roller is not sufficiently suppressed. If the interval between the upper and lower rollers changes due to this vibration, the banknote thickness detection device cannot accurately detect the thickness of the banknote. Summary of the Invention

[0006] The present invention was made in consideration of the above-mentioned problems, and its purpose is to improve the accuracy of paper thickness detection by suppressing the vibration caused by the impact when paper enters between the reference roller and the detection roller in a paper thickness detection device while ensuring maintainability.

[0007] To address this issue, one technical solution of the present invention is a paper thickness detection device for detecting the thickness of paper. The device comprises: a first unit having a reference roller; and a second unit having a detection roller and a thickness sensor. The detection roller and the reference roller together clamp the paper and convey it. The detection roller is displaced relative to the reference roller according to the thickness of the paper. The thickness sensor detects the thickness of the paper based on the displacement of the detection roller. The first unit and the second unit overlap to form a paper conveying path by the reference roller and the detection roller clamping the paper, and are assembled in a way that allows opening and closing around a rotation axis located at one end of the conveying path. The second unit has a vibration damping component at the thickness sensor.

[0008] Invention Effects

[0009] According to the present invention, for example in a paper thickness detection device, the accuracy of paper thickness detection can be improved by suppressing vibrations caused by the impact of paper entering between the reference roller and the detection roller while ensuring maintainability. Attached Figure Description

[0010] Figure 1 This is a perspective view of the cash automatic transaction device according to the implementation method.

[0011] Figure 2 This is a schematic diagram showing the internal structure of the automated cash transaction device according to an embodiment.

[0012] Figure 3 This is a side view of a banknote recognition device according to an embodiment.

[0013] Figure 4 This is a top view of a banknote recognition device according to an embodiment.

[0014] Figure 5 This is a front view of a banknote recognition device according to an embodiment.

[0015] Figure 6 This is a top view of the thickness detection device according to the implementation method (with the upper and lower units closed).

[0016] Figure 7 This is a perspective view of the thickness detection device according to the implementation method (with the upper and lower units closed).

[0017] Figure 8 This is a front view of the thickness detection device according to the embodiment (with the upper and lower units closed).

[0018] Figure 9 This is a side sectional view of the thickness detection device according to the embodiment (with the upper and lower units closed).

[0019] Figure 10 This is a side sectional view of the thickness detection device according to the embodiment (with the upper and lower units open).

[0020] Figure 11 This is a front view of the thickness detection device according to the embodiment (with the upper and lower units open).

[0021] Figure 12 This is a graph showing the change in thickness measurement value caused by the vibration of the detection roller in a thickness measurement device without vibration damping components, as described in the comparative example.

[0022] Figure 13 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller in the thickness detection device of Example 1, which uses a beam to press a vibration damping component with a viscosity coefficient less than a specified value.

[0023] Figure 14 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller in the thickness detection device of Embodiment 2, which is equipped with a vibration damping component with a viscosity coefficient of more than a specified value.

[0024] Figure 15 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller in the thickness detection device of Example 3, which uses a beam to press a vibration damping component with a viscosity coefficient of more than a specified value.

[0025] Label Explanation

[0026] 1: Automated Cash Transaction Device; 10: Banknote Processing Device; 30: Banknote Recognition Device; 30T: Thickness Detection Device; 30L: Lower Unit; 30U: Upper Unit; 30TL: Lower Unit (Unit 1); 30TU: Upper Unit (Unit 2); 30a: Conveying Path; 31: Bracket; 32: Sensor Substrate; 33: Vibration Damping Component; 34: Beam; 35: Reference Roller; 36: Detection Roller; 37, 37LR, 37LL, 37UR, 37UL: Housing. Detailed Implementation

[0027] Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings. The embodiments described below, including the accompanying drawings, are merely illustrative and not intended to limit the scope of the invention. In the figures used to describe the embodiments, the same reference numerals denote components or processes having the same or similar functions, and subsequent descriptions are omitted. Furthermore, each embodiment, example, and modification can be appropriately combined in part or in whole within the scope and matching range of the technical concept of the present invention.

[0028] In the following embodiments, the vertical direction (upward direction, above) of the device housing of the automated cash transaction device is defined as the positive direction of the Z-axis, and the direction from the user side (front side, front) of the device housing to the opposite side (back side, rear) is defined as the positive direction of the Y-axis. Furthermore, the direction from left to right towards the user side of the device housing is defined as the positive direction of the X-axis. In the following description of the embodiments, an orthogonal XYZ coordinate system with orthogonal X, Y, and Z axes is used.

[0029] Furthermore, the directions and positions indicated by "up," "down," "left," "right," "front," "back," and "back" in the following embodiments are only relative, and the orientation, shape, or size of the automated cash transaction device and its components are not limited by the XYZ coordinate system. Moreover, the number of components shown in the description and illustrations of the embodiments is merely one example.

[0030] In the following embodiments, examples of paper thickness detection devices, paper recognition devices, paper processing devices, and automated paper transaction devices will be used, with banknotes being treated as paper. However, the embodiments are not limited to this, and can also be used to process various other types of paper, such as checks or vouchers.

[0031] (Overall structure of the automated cash transaction device 1)

[0032] Figure 1 This is a perspective view of the external appearance of the automated cash transaction device 1 according to the embodiment. The automated cash transaction device 1 uses cash cards, banknotes, transaction slips, etc., as transaction media, and processes cash deposits, payments, transfers, etc., through user operation. In the upper part of the device housing of the automated cash transaction device 1, there is a passbook processing mechanism (not shown) that processes the user's passbook and prints and dispenses transaction details, and a card and transaction slip processing mechanism (not shown) that processes the user's card and prints and dispenses transaction slips.

[0033] The passbook processing unit processes the user's passbook inserted into slot 2 on the front of the automated cash transaction device 1, prints and dispenses the transaction details. The card and statement processing unit processes the user's card inserted into slot 3 on the front of the automated cash transaction device, prints the transaction statement and dispenses it along with the card. On the front of the automated cash transaction device 1, there is a screen operation unit 4 that displays the user's transaction details and allows for the input of various information and items used for the transaction.

[0034] The lower part of the housing of the automatic cash transaction device 1 includes a banknote processing device 10 for processing banknotes. Banknote deposit and withdrawal transactions are performed in accordance with the opening and closing of the opener 5a provided at the deposit and withdrawal section 5 of the banknote processing device 10.

[0035] Alternatively, a coin handling device (not shown) may be provided inside the housing of the automatic cash transaction device 1. Coin deposit and withdrawal transactions are performed in accordance with the opening and closing of the opening and closing device (not shown) provided at the deposit and withdrawal section of the coin handling device.

[0036] (Internal structure of the automated cash transaction device 1)

[0037] Figure 2 This is a schematic diagram showing the internal structure of the automated cash transaction device 1 according to the embodiment. Above the lower part of the housing of the automated cash transaction device 1, a banknote processing mechanism is arranged, and below it, a banknote storage mechanism is arranged. Above the lower part of the housing of the banknote processing device 10, on its front side (the side facing the user): Figure 2 On the upper right side, there is a deposit / discharge section 5. This deposit / discharge section 5 receives banknotes placed roughly vertically by the user, places the banknotes roughly vertically, and dispenses them for the user to take. The deposit / discharge section 5 is provided with a banknote dispensing section 5b that sends banknotes inserted from above to below, and a banknote stacking section 5c that stacks banknotes for dispensing or returning from below.

[0038] In addition, a banknote recognition device 30 for identifying banknotes is installed in the central part, and on the rear side ( Figure 2 The upper left side of the device is equipped with a temporary holding section 40 that temporarily holds the banknotes inserted by the user until the transaction is completed. These various sections are connected by a bidirectional transport path.

[0039] The banknote recognition device 30 can identify the denomination and authenticity of banknotes transported from both the front and rear along the transport path 30a, regardless of the direction of origin. The banknote recognition device 30 can identify the denomination and authenticity of banknotes transported in both directions (incoming and outgoing), and can determine whether the banknote can be accepted and whether it can be disbursed.

[0040] Below the banknote processing device 10, there are multiple storage sections 70 for storing banknotes according to their denominations. Among the storage sections 70 are sections for storing banknotes that the banknote recognition device 30 has determined are acceptable for each denomination. In addition, the storage sections 70 also include sections for temporarily storing banknotes that the banknote recognition device 30 has determined are unacceptable, sections for storing banknotes that the banknote recognition device 30 has determined are undispensable, and sections for use when banknotes are replenished from external sources for dispensing purposes.

[0041] (Appearance and structure of the banknote recognition device 30)

[0042] Reference Figures 3-5 The appearance and structure of the banknote recognition device 30 according to the relevant embodiments are described. Figure 3 This is a side view of the banknote recognition device 30 according to the embodiment, viewed from the negative X-axis direction. Figure 4 This is a top view of the banknote recognition device 30 according to the embodiment, viewed from the positive Z-axis direction. Figure 5 This is a front view of the banknote recognition device 30 according to the embodiment, viewed from the negative Y-axis direction.

[0043] The banknote recognition device 30, sandwiching a banknote transport path 30a, comprises an upper unit 30U, which is a modular unit consisting of components located above the transport path 30a, and a lower unit 30L, which is a modular unit consisting of components located below the transport path 30a. The banknote recognition device 30 is structured such that the upper unit 30U, relative to the lower unit 30L, is mounted on one end side (positive Y-axis direction side) in the banknote transport direction, with a rotation axis 30X parallel to the X-axis as the center of rotation. The upper unit 30U can rotate around the rotation axis 30X towards arrow A (…). Figure 3 (Open in the direction)

[0044] Furthermore, the banknote recognition device 30 is located inside the rotating axis 30X. Figure 3 Area 30Z1 Figure 4 The area around 30Z2 is equipped with a thickness detection device 30T that detects the thickness of banknotes being transported in the transport path 30a. Figures 6 to 11 ).

[0045] (Structure of the 30T thickness detection device)

[0046] Reference Figures 6 to 11 The structure of the thickness detection device 30T according to the relevant implementation method is described. Figure 6 This is a top view of the thickness detection device 30T according to the embodiment, viewed from the positive Z-axis direction. Figure 7 This is a perspective view of the thickness detection device 30T according to the implementation method (with the upper and lower units closed). Figure 8 This is a front view of the thickness detection device 30T according to the embodiment, viewed from the positive Y-axis direction (with the upper and lower units closed). Figure 9 This is a side sectional view of the thickness detection device 30T according to the embodiment, viewed from the negative X-axis direction (with the upper and lower units closed). Figure 10 This is a side sectional view of the thickness detection device 30T according to the embodiment, viewed from the negative X-axis direction (with the upper and lower units open). Figure 11This is a front view of the thickness detection device 30T according to the embodiment, viewed from the positive Y-axis direction (with the upper and lower units open).

[0047] Figure 6 The top view of the 30T thickness detection device is shown in Figure 4 The diagram in the top view of the banknote recognition device 30 omits illustrations of elements other than the thickness detection device 30T. Furthermore, Figure 9 The side sectional view of the 30T thickness detection device is shown in Figure 3 The side view of the banknote recognition device 30 omits the illustration of elements other than the thickness detection device 30T.

[0048] like Figures 6-7 As shown, the thickness detection device 30T includes a bracket 31, a sensor substrate 32, a vibration damping component 33, a beam 34, a reference roller 35, a reference roller shaft 35X, a detection roller 36, a detection roller shaft 36X, and a housing 37.

[0049] The housing 37 includes housings 37UR and 37UL on the upper unit 30U side and housings 37LR and 37LL on the lower unit 30L side of the banknote recognition device 30. Housings 37UR and 37LR form the end face on the positive X-axis side of the thickness detection device 30T. Housings 37UL and 37LL form the end face on the negative X-axis side of the thickness detection device 30T.

[0050] Housings 37UR and 37UL are mounted perpendicularly to beam 34 from both ends along the X-axis. A bracket 31 is mounted on housings 37UR and 37UL, supporting a sensor substrate 32, on which a thickness sensor is mounted (described later), with the thickness sensor facing the detection roller 36. Furthermore, a vibration damping component 33 is provided on the bracket 31 (described later). The bracket 31, sensor substrate 32, vibration damping component 33, beam 34, detection roller 36, detection roller shaft 36X, and housings 37UR and 37UL constitute the upper unit 30TU of the thickness detection device 30T. Figure 7 The reference roller 35 and the reference roller shaft 35X constitute the lower unit 30TL of the thickness detection device 30T. Figure 7 ).

[0051] The reference roller 35X is a rotating shaft that transmits rotational driving force from the conveying drive system (not shown) of the banknote conveying mechanism, and is mounted on the housings 37LR and 37LL along the width direction (X-axis direction) of the conveying path. The detection roller 36X is mounted on the housings 37LR and 37LL opposite to the upper side (positive Z-axis direction) of the reference roller 35X.

[0052] Multiple reference rollers 35 are arranged on the lower reference roller shaft 35X. In addition, the same number of detection rollers 36 as the reference rollers 35 are arranged on the upper detection roller shaft 36X in a manner opposite to each reference roller 35.

[0053] The detection roller 36 consists of an outer wheel and an elastic component such as a spring or rubber that can elastically deform in the direction of pressing against the reference roller 35. The outer wheel is composed of a cylindrical non-elastic component such as metal whose outer circumference does not shift.

[0054] The reference roller 35 is made of metal, and its outer peripheral surface is set as a non-displaceable reference surface. Each detection roller 36 is in contact with this reference surface. Furthermore, each detection roller 36 is pushed and rotated by the corresponding reference roller 35. In addition, if a banknote is held between the detection roller 36 and the reference roller 35, the outer wheel of the detection roller 36, which faces the outer peripheral surface of the reference roller 35 (which serves as the reference surface), is displaced upward (in the positive Z-axis direction from the reference roller axis 35X toward the detection roller axis 36X) according to the thickness of the banknote.

[0055] A sensor substrate 32 is disposed above (in the positive Z-axis direction) a plurality of detection rollers 36. This sensor substrate 32 is equipped with a thickness sensor (not shown) positioned opposite each detection roller 36, and a sensor processing unit (not shown) that processes data obtained from the thickness sensors (not shown). The thickness sensor is, for example, an eddy current magnetic field displacement sensor capable of detecting the amount of elastic displacement of the opposing detection roller 36 in the vertical direction (Z-axis direction) corresponding to the thickness of the banknote held between the reference roller 35. The sensor substrate 32 is supported by a bracket 31 with the thickness sensors facing the detection rollers 36. The thickness detection device 30T detects the thickness of the banknote based on the amount of displacement of the detection rollers 36 detected by the thickness sensors.

[0056] The vibration damping component 33 is an elongated component arranged on the bracket 31 in a manner extending in the width direction (X-axis direction) of the conveying path 30a, but its shape is not limited to an elongated shape. The vibration damping component 33 is preferably a viscoelastic component, but is not limited to a viscoelastic component. Multiple vibration damping components 33 are stacked relative to the bracket 31 in the positive Z-axis direction toward the beam 34, but it can also be a single layer. The vibration damping component 33 is a damper that suppresses vibration of the detection roller 36 caused by the impact of a banknote protruding between the reference roller 35 and the detection roller 36.

[0057] If these damping components 33 are pressed by a pressing component with higher rigidity than the damping component 33, the initial amplitude of the detection roller 36 is suppressed, and the damping time is shortened. When existing components can be used as pressing components, the damping effect of the damping component 33 becomes more effective by filling the space between the mounting surface of the damping component 33 and the pressing component with the damping component 33. In this embodiment, as... Figure 7As shown, beam 34 is used as a pushing component, and vibration damping components 33 are stacked and filled on bracket 31 in the positive Z-axis direction until beam 34 is reached, thereby improving the vibration damping effect. A new pushing component for pushing vibration damping components 33 can also be set, but by using existing components such as beam 34, the vibration damping effect of vibration damping components 33 can be improved without increasing the number of components.

[0058] Furthermore, the vibration damping component 33 is only required to be in a position relative to the vibration direction (or damping direction) of the detection roller 36, and is not limited to this. Figures 7-9 The shape shown can achieve vibration reduction effect when configured on any of the upper unit 30TUs.

[0059] like Figure 3 As shown, if the upper unit 30U of the banknote recognition device 30 rotates and moves relative to the lower unit 30L in the direction of arrow A with the rotation axis 30X as the center, then the upper unit 30TU of the thickness detection device 30T rotates and moves relative to the lower unit 30TL in the direction of arrow A. Figure 10 The upper unit 30TU includes housings 37UR and 37UL, a bracket 31, a sensor substrate 32, a vibration damping component 33, and a beam 34. The lower unit 30TL includes housings 37LR and 37LL, and a reference roller 35X. Figure 11 yes Figure 10 The image shows a front view of the thickness detection device 30T with the upper and lower units open, viewed from the positive Y-axis direction.

[0060] (The vibration reduction effect of the detection roller 36 caused by the vibration damping component 33)

[0061] Reference Figures 12-15 The vibration reduction effect of the detection roller 36 caused by the vibration reduction component 33 of the relevant embodiment is explained. Figures 10-15 With time as the horizontal axis and the thickness detection value of the detection roller 36 as the vertical axis, the time change of the thickness detection value caused by the vibration of the detection roller 36 when conveying banknotes of a specified thickness is represented.

[0062] First, as a comparative example, the time variation of vibration of the detection roller 36 in the case where the damping component 33 is not provided in the thickness detection device 30T will be explained. Figure 12 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller 36 in a comparative example of the thickness detection device 30T without the vibration damping component 33.

[0063] like Figure 12 As shown, the vibration of the detection roller 36 occurring at time t=0 causes the detection value of the thickness sensor mounted on the sensor substrate 32 to vibrate, but as... Figure 12 As shown in the circular enclosed portion, the time required for the vibration to converge to the specified range is up to time t = t5.

[0064] Next, as Example 1, the time variation of vibration of the detection roller 36 when the vibration damping component 33 with a viscosity coefficient less than a specified value is pressed onto the thickness detection device 30T by the beam 34 will be described. Figure 13 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller 36 in the thickness detection device 30T of Embodiment 1, which uses beam 34 to push the damping component 33 with a viscosity coefficient less than a specified value.

[0065] like Figure 13 As shown, the vibration of the detection roller 36 occurring at time t=0 causes the detection value of the thickness sensor mounted on the sensor substrate 32 to vibrate, but as... Figure 13 As shown in the circular enclosed portion, the time required for the vibration to converge to the specified range is approximately up to time t = t2. Compared to the comparative example, Example 1 suppresses the amplitude of the initial vibration at time t = 0, and the convergence time of the vibration is shortened. In Example 1, the vibration damping component 33, which is pushed by the beam 34, can be said to function as a reinforcement to suppress vibration.

[0066] Next, as Example 2, the time variation of vibration of the detection roller 36 will be described when a vibration damping component 33 with a viscosity coefficient of more than a specified value is provided in the thickness detection device 30T. Figure 14 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller 36 in the thickness detection device 30T of Embodiment 2, which is equipped with a vibration damping component 33 with a viscosity coefficient of more than a specified value.

[0067] like Figure 14 As shown, the vibration of the detection roller 36 occurring at time t=0 causes the detection value of the thickness sensor mounted on the sensor substrate 32 to vibrate, but as... Figure 14 As shown in the circular enclosed portion, the time required for the vibration to converge to the specified range is approximately up to time t = t1. Compared to Example 1, Example 2 has a larger amplitude, but the convergence time of the vibration is shorter. In Example 2, the vibration damping component 33 can be said to function as a damper that absorbs vibration.

[0068] Next, as Example 3, the time variation of vibration of the detection roller 36 when the vibration damping component 33 with a viscosity coefficient of more than a specified value is pressed onto the thickness detection device 30T by the beam 34 will be described. Figure 15 This is a graph showing the change in thickness detection value caused by the vibration of the detection roller 36 in Embodiment 3 of the thickness detection device 30T, which uses beam 34 to press the vibration damping component 33 with a viscosity coefficient of more than a specified value.

[0069] like Figure 15As shown, the vibration of the detection roller 36, which occurs at time t=0, causes the thickness sensor mounted on the sensor substrate 32 to vibrate. Figure 15 As shown in the circular enclosed portion, the time required for the vibration to converge to the specified range is approximately up to time t = (t1 / 2). Compared to Example 2, Example 3 shows a shorter convergence time. In Example 3, the viscosity coefficient of the damping component 33 is above a specified value, and by pressing the damping component 33 with a beam 34 that has a higher rigidity than the damping component 33, the damping performance of the vibration absorber is further improved.

[0070] Based on the above, the damping component 33 absorbs vibration in a decreasing manner from high to low in the order of Embodiments 3, 2, and 1, thereby reducing the vibration of the detection roller 36 in a shorter time. Therefore, according to these embodiments, the vibration of the detection roller 36 caused by the impact of a banknote entering between the reference roller 35 and the detection roller 36 can be suppressed, thus improving the accuracy of banknote thickness detection. Furthermore, even in a structure where the banknote recognition device 30 and the thickness detection device 30T are divided into upper units 30U, 30TU and lower units 30L, 30TL and can be installed in an openable and closable manner, the vibration of the detection roller 36 can still be suppressed. Therefore, both maintainability and ease of maintenance when removing banknotes stuck between the reference roller 35 and the detection roller 36 can be achieved.

[0071] Furthermore, the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above are given in detail to facilitate understanding of the present invention, and are not limited to necessarily possessing all the structures described. Moreover, as long as there is no contradiction, a part of the structure of one embodiment can be replaced with the structure of another embodiment, or the structure of another embodiment can be added to the structure of one embodiment. Furthermore, regarding a part of the structure of each embodiment, additions, deletions, substitutions, mergers, and divisions are possible. Furthermore, the processes represented in the embodiments can also be appropriately distributed or merged based on processing efficiency or installation efficiency.

Claims

1. A paper thickness detection device for detecting the thickness of paper, characterized in that, have: Unit 1 includes a reference roller; and The second unit includes a detection roller and a thickness sensor. The detection roller, together with the reference roller, clamps and conveys the paper. The detection roller is displaced relative to the reference roller according to the thickness of the paper. The thickness sensor detects the thickness of the paper based on the amount of displacement of the detection roller. The first unit and the second unit are overlapped to form a paper transport path by means of the reference roller and the detection roller sandwiching the paper, and can be assembled to open and close around a rotating shaft provided at one end of the transport path. The second unit described above has a vibration damping component in the thickness sensor described above; The aforementioned vibration damping component undergoes viscous deformation in the vibration damping direction that dampens the vibration of the aforementioned detection roller; The second unit described above has a bracket that supports the thickness sensor in a manner opposite to the detection roller; The aforementioned vibration damping components are mounted on the aforementioned bracket; The aforementioned paper thickness detection device also has a pushing component with higher rigidity than the aforementioned vibration damping component, which pushes the aforementioned vibration damping component together with the mounting surface of the aforementioned vibration damping component.

2. The paper thickness detection device as described in claim 1, characterized in that, The viscosity coefficient of the aforementioned vibration damping components is above the specified value.

3. The paper thickness detection device as described in claim 1, characterized in that, The aforementioned pushing component is an existing component of the aforementioned second unit that has functions other than the pushing function of the aforementioned vibration damping component; The aforementioned vibration damping components are filled between the aforementioned configuration surface and the aforementioned pressing component.

4. A paper recognition device, characterized in that, The paper thickness detection device has any one of claims 1 to 3.

5. A paper processing apparatus, characterized in that, It has the paper identification device as described in claim 4.

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