JP7040973B2 - Thickness detector - Google Patents

Description

The present invention relates to a thickness detecting device for detecting the thickness of paper leaves.

Conventionally, a thickness detecting device for detecting the thickness of paper sheets such as banknotes has been used. For example, a thickness detection device is used to find a forged banknote bonded with tape or the like in a banknote processing device. Patent Document 1 discloses a thickness detecting device including a reference roller and a detecting roller. The reference roller and the detection roller are arranged so as to face each other so that the outer peripheral surfaces are in contact with each other. The position of the reference roller is fixed. The detection roller is rotatably supported by a support shaft fixed to the detection block. When the paper leaves pass between the reference roller and the detection roller, the detection roller rotates. The thickness detecting device detects the thickness of paper sheets from the displacement of the rotating detection roller.

Japanese Patent No. 4819162

However, in the above-mentioned conventional technique, when the transport speed of paper sheets becomes high, the support shaft that rotatably supports the detection rollers vibrates due to the impact when the paper sheets rush between the reference roller and the detection roller. There was a case. When the support shaft vibrates, the output signal of the sensor that measures the displacement of the detection roller is disturbed, and the accuracy of thickness detection may decrease.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a thickness detecting device that suppresses the influence of vibration of a support shaft and detects the thickness of paper sheets with high accuracy. ..

In order to solve the above-mentioned problems and achieve the object, the present invention is a thickness detection device that detects the thickness of paper sheets conveyed between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers. A plurality of detection blocks that rotatably support at least one detection roller facing the reference roller, a support shaft that rotatably supports the plurality of detection blocks, and the plurality of detection blocks. A holding portion that holds both ends of the support shaft sandwiched between them, an urging member for urging the detection roller toward the reference roller, and a movement amount of the detection roller with respect to the reference roller are detected. A restraining member is provided between the sensor portion and the holding portion to suppress vibration of the support shaft, and the restraining member includes a fixed surface fixed to the holding portion and a support surface for holding the support shaft. A fixed portion having a shape in which two surfaces are connected and having two surfaces corresponding to the fixed surface and the support surface is formed in the holding portion, and the restraining member is at least one of the support surfaces. It is characterized in that the portion is brought into contact with one surface of the fixing portion and at least a part of the fixing surface is brought into contact with the other surface of the fixing portion and is fixed to the holding portion .

Further, in the present invention, in the above invention, the restraining member is further fixed to the holding portion in a state where at least a part of a surface different from the supporting surface and the fixing surface is in contact with the holding portion. It is characterized by.
Further, the present invention is characterized in that, in the above invention, the different surface is a surface constituting the upper edge of the support surface.

Further, the present invention is characterized in that, in the above invention, the restraint member is supported by inserting the support shaft through a through hole formed in the support surface of the restraint member.

Further, the present invention is a thickness detection device that detects the thickness of paper sheets conveyed between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers, and is at least facing the reference rollers. A plurality of detection blocks that rotatably support one detection roller, a support shaft that rotatably supports the plurality of detection blocks, and a holding that holds the support shaft with the plurality of detection blocks sandwiched between them. The support shaft between the section, the urging member for urging the detection roller toward the reference roller, the sensor section for detecting the amount of movement of the detection roller with respect to the reference roller, and the holding section. A restraining member for suppressing vibration is provided, and the support shaft is fixed to the restraining member by a fastening member.

Further, the present invention is characterized in that, in the above invention, the fastening member is a screw.

Further, the present invention is a thickness detection device that detects the thickness of paper sheets conveyed between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers, and is at least facing the reference rollers. A plurality of detection blocks that rotatably support one detection roller, a support shaft that rotatably supports the plurality of detection blocks, and a holding that holds the support shaft with the plurality of detection blocks sandwiched between them. The support shaft between the section, the urging member for urging the detection roller toward the reference roller, the sensor section for detecting the amount of movement of the detection roller with respect to the reference roller, and the holding section. The support shaft includes a restraining member that suppresses vibration, and the support shaft is composed of a plurality of shafts, and the restraining member supports two of the shafts.
The thickness detecting device according to any one of claims 5 to 7, wherein the restraining member is fixed to the holding portion in the above invention.

Further, in the present invention, in the above invention, the support shaft is at least between the position where the holding portion holds the end portion of the support shaft and the position where the restraining member suppresses the vibration of the support shaft. It is characterized by supporting one of the detection blocks.
Further, in the present invention, the restraining member is characterized in that at least a part of the support shaft is brought into contact with the restraining member to support the support shaft.
Further, in the present invention, in the above invention, the plurality of detection rollers are arranged side by side in a direction perpendicular to the transport direction of the paper sheets and parallel to the surface of the paper sheets, and the entire width of the plurality of detection rollers. Is larger than the length of the paper sheets in the direction in which the plurality of detection rollers are arranged side by side.

According to the present invention, it is possible to suppress the vibration of the support shaft generated when the conveyed paper leaves rush between the reference roller and the detection roller. As a result, the thickness of the sheets of paper passing between the rollers can be detected with high accuracy.

FIG. 1 is a schematic diagram for explaining a method of detecting the thickness of paper sheets by a thickness detecting device. FIG. 2 is a perspective view of a detection block to which a detection roller and a permanent magnet are attached. FIG. 3 is a diagram showing a support method of a support shaft to which a plurality of detection blocks are attached. FIG. 4 is a perspective view for explaining a method of supporting the support shaft by the support member. FIG. 5 is a three-view view showing the shape of the support member shown in FIG. FIG. 6 is a perspective view showing another example of the support member. FIG. 7 is a three-view view showing the shape of the support member shown in FIG. FIG. 8 is a schematic diagram showing another method of supporting the support shaft. FIG. 9 is a schematic view showing another support method by the support member.

Hereinafter, preferred embodiments of the thickness detecting device according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram for explaining a method of detecting the thickness of paper sheets by a thickness detecting device. FIG. 2 is a perspective view of the detection block 10 to which the detection roller 12 and the permanent magnet 13 are attached.

As shown in FIG. 1, the thickness detecting device includes a reference roller 60 whose position is fixed, and a plurality of detection rollers 12 arranged to face the reference roller 60 in a state where the outer peripheral surface and the outer peripheral surface of the reference roller 60 are in contact with each other. And include. The thickness detecting device detects the thickness of paper sheets by detecting the positions of the plurality of detecting rollers 12 with respect to the reference roller 60. The range for detecting the thickness of the paper leaves can be arbitrarily set, but in the present embodiment, since the thickness of the target paper leaves is detected over the entire surface, the paper leaves transported along the transport path are detected. A plurality of detection rollers 12 are arranged in a range wider than the width (see FIG. 3).

The reference roller 60 is rotatably supported by the support shaft 61. The position of the reference roller 60 is fixed, and the position of the reference roller 60 does not change while the paper sheets 100 transported along the transport path 70 pass between the reference roller 60 and the detection roller 12. The thickness detection device is based on the amount of movement of the detection roller 12 when the paper sheets 100 transported along the transport path 70 pass between the rollers, based on the position where the detection roller 12 and the reference roller 60 face each other. , Detects the thickness of the paper leaves 100. As shown in FIG. 1, when the paper sheets 100 are transported to the left in the transport path 70, the detection roller 12 and the reference roller rotate as indicated by the arrows. The thickness detecting device detects the thickness of the paper sheets 100 in the portion sandwiched between the reference roller 60 and the detecting roller 12.

The detection roller 12 is rotatably supported by the support shaft 11. The support shaft 11 is fixed to the main body of the detection block 10 made of a metal material or a resin material. As shown in FIG. 2, a tubular sleeve 14 made of a metal material is inserted and fixed in a through hole formed in the main body of the detection block 10. The axial length of the sleeve 14 is longer than that of the main body of the detection block 10, and both end faces of the sleeve 14 are exposed to the outside of the main body. The sleeve 14 functions as a bearing member for the support shaft 50. As shown in FIG. 1, the detection block 10 is rotatably supported while the support shaft 50 is passed through the sleeve 14. Both ends of the support shaft 50 are fixed to the holding block 20 (see FIG. 3). As shown in FIG. 1, the support shaft 50 that supports the detection block 10 is located at a position distant from the position of the support shaft 11 that supports the detection roller 12 in the transport direction of the paper sheets 100.

As shown in FIG. 2, a convex portion 41 is formed on the upper surface of the detection block 10 and above the detection roller 12. As shown in FIG. 1, the convex portion 41 is urged downward by a leaf spring 40 (a urging member). One end side of the leaf spring 40 is fixed to the holding block 20, and the other end side is in contact with the convex portion 41. The urging member that urges the holding block 20 downward is not limited to the leaf spring 40, and may be a mode in which another type of spring is used, or a mode in which rubber or the like is used. good.

When there is no paper leaf 100 between the detection roller 12 and the reference roller 60, the outer peripheral surface of the detection roller 12 urged by the leaf spring 40 is pressed against the outer peripheral surface of the reference roller 60. As shown in FIG. 1, when the paper sheets 100 transported along the transport path 70 enter between the detection roller 12 and the reference roller 60, the detection roller 12 is pushed upward. At this time, the detection block 10 rotates while pushing up the leaf spring 40 around the support shaft 50.

A permanent magnet 13 is provided on the upper surface of the detection block 10 and above the support shaft 50. The position of the permanent magnet 13 changes as the detection block 10 rotates about the support shaft 50. A sensor unit 30 having a Hall element 31 is fixed at a position on the upper surface of the holding block 20 and above the permanent magnet 13. The sensor unit 30 is arranged so that the Hall element 31 is located above the permanent magnet 13. The sensor unit 30 detects the amount of movement of the permanent magnet 13 fixed to the detection roller 12 by the Hall element 31. That is, the sensor unit 30 detects the amount of movement of the detection roller 12 that moves with respect to the reference roller 60 whose position is fixed.

The paper leaf 100 enters between the detection roller 12 and the reference roller 60, and the detection roller 12 is pushed up by the thickness of the paper leaf 100. The detection block 10 rotates in response to the detection roller 12 being pushed up, and the position of the permanent magnet 13 changes. When the position of the permanent magnet 13 changes, the signal output from the Hall element 31 changes. Based on the amount of change in this signal, the sensor unit 30 can detect the amount of the detection roller 12 pushed up by the paper sheets 100, that is, the thickness of the paper sheets 100. After the paper sheets 100 pass between the detection roller 12 and the reference roller 60, the leaf spring 40 pushes down the detection block 10 and returns to a state where the outer peripheral surface of the detection roller 12 is in contact with the outer peripheral surface of the reference roller 60. ..

FIG. 3 is a diagram showing a support method of a support shaft 50 to which a plurality of detection blocks 10 are attached. FIG. 3 shows a view of the detection block 10 as viewed from the right side of FIG. Both ends of the sleeve 14 in the axial direction are slightly outward from the main body of the detection block 10. Therefore, as shown in the partially enlarged view in FIG. 3, the adjacent detection blocks 10 come into contact with each other only at the end surface of the sleeve 14.

As shown in FIG. 3, a plurality of detection blocks 10 to which a detection roller 12 and a permanent magnet 13 are attached are arranged along a support shaft 50 whose both ends are fixed to the holding block 20. Specifically, a plurality of detection rollers 12 are arranged in a range wider than the width of the paper sheets 100 to be transported. That is, in the transport path width direction (axial direction of the support shaft 50) perpendicular to the transport direction of the paper leaves, a plurality of detection rollers 12 are arranged in a range exceeding the length of the paper leaves in that direction. Two detection rollers 12 are attached to one detection block 10. One or more reference rollers 60 are arranged to face each detection roller 12. The leaf spring 40 fixed to the holding block 20 urges each detection block 10 rotatably supported by the support shaft 50. As a result, the outer peripheral surface of each detection roller 12 comes into contact with the outer peripheral surface of the reference roller 60 whose position is fixed. The plurality of detection rollers 12 are arranged side by side in a direction perpendicular to the transport direction, parallel to the surface of the paper sheets 100 to be transported. The overall width of the plurality of detection rollers 12 arranged side by side is larger than the length of the paper sheets 100 in the direction in which the plurality of detection rollers 12 are arranged side by side. In other words, the plurality of detection rollers 12 are arranged so that the distance between the two detection rollers 12 arranged on both outer sides in the arrangement direction is larger than the length of the paper sheets in the direction perpendicular to the transport direction. .. Of the plurality of detection rollers 12, the detection roller 12 at the position where the paper sheets 100 pass is pushed up and the detection block 10 rotates. The sensor unit 30 detects the thickness of the paper sheets 100 based on the rotational displacement of the detection block 10.

For example, when the tape is attached to the paper sheets 100, the amount of rotational displacement of the detection roller 12 pushed up by the tape is the amount of rotational displacement of the detection roller 12 pushed up by the paper sheets 100 at the position where there is no tape. Become bigger. The thickness detection device detects that the tape is attached to the paper sheets 100 based on the amount of rotational displacement of the detection block 10, and also detects the paper leaves based on the position of the rotated detection block 10. The position of the tape attached to 100 can be specified.

The holding block 20 functions as a holding portion for holding both ends of the support shaft 50. A plurality of detection blocks 10 are attached to a support shaft 50 whose both ends are fixed to the holding block 20. As shown in FIG. 3, a compression spring 51 is attached between the two detection blocks 10 and the holding block 20 located on both outer sides of the support shaft 50 in the axial direction. The compression spring 51 applies a thrust pressure that presses the sleeve 14 of the detection block 10 from both outer sides in the axial direction of the support shaft 50.

A support member 80 that supports the support shaft 50 is attached to a position substantially at the center of the support shaft 50 in the axial direction. The holding block 20 holds both ends of the support shaft 50 with a plurality of detection blocks 10 sandwiched between them. The support member 80 is attached to the holding block 20 at a position between the holding positions at both ends where the holding block 20 holds the support shaft 50. FIG. 3 shows an example in which 16 detection blocks 10 are attached to the support shaft 50, and the support member 80 is attached at a position where the detection blocks 10 are divided into 8 pieces each. The support member 80 has a shape in which a plate-shaped member made of a metal material is bent into an L shape. One surface of the L-shape is fixed to the fixing portion 20a of the holding block 20 provided at a substantially central position in the axial direction of the support shaft 50 by a fastening member such as a screw 90. The support member 80 is supported by inserting the support shaft 50 into a through hole formed on the other surface of the L-shape. The support member 80 supports the support shaft 50 at a position different from the position where the holding block 20 holds the support shaft 50. The support member 80 functions as a deterrent member that prevents the support shaft 50 from moving or deforming in a direction other than the axial direction. As a result, the vibration of the support shaft 50 can be suppressed as compared with the case where the support shaft 50 is held only by the holding block 20. That is, the support member 80 also functions as a vibration damping member that suppresses the vibration of the support shaft 50.

The structure of the support member 80 will be described. FIG. 4 is a perspective view for explaining a method of supporting the support shaft 50 by the support member 80. FIG. 5 is a three-view view showing the shape of the support member 80 shown in FIG. As a front view of FIG. 3, FIG. 5 (b) shows a front view, FIG. 5 (a) shows a plan view, and FIG. 5 (c) shows a right side view.

As shown in FIG. 5A, the support member 80 has a shape in which, for example, a metal plate having a thickness of 1.5 mm is bent by approximately 90 degrees. The support member 80 has a shape in which a fixed surface 80a for fixing the support member 80 to the holding block 20 and a support surface 80b for supporting the support shaft 50 are connected by a connection surface 80c. As shown in FIG. 5C, the connecting surface 80c is located at an intermediate position lower than the upper edge and higher than the lower edge of the support surface 80b. Further, the connecting surface 80c is located at a position lower than the upper edge of the fixed surface 80a, and the lower edge of the connecting surface 80c is continuous with the lower edge of the fixed surface 80a.

A through hole 81 for supporting the support shaft 50 is formed on the support surface 80b. A through hole 82 for fixing the support member 80 to the fixing portion 20a of the holding block 20 by using a fastening member such as a screw 90 is formed on the fixing surface 80a. The through hole 82 for the screw 90 is located higher than the through hole 81 for the support shaft 50.

As shown in FIG. 4, the support member 80 is fixed to the front surface of the fixing portion 20a of the holding block 20 by a screw 90 through the through hole 82 of the fixing surface 80a. At this time, as shown in FIG. 5A, at least a part of the inner surface of the fixed surface 80a (upper side of FIG. 5A) comes into contact with the front surface of the fixed portion 20a. At least a part of the inner surface of the support surface 80b (left side in FIG. 5A) comes into contact with the side surface of the fixing portion 20a. Further, as shown in FIGS. 5 (b) and 5 (c), at least a part of the upper edge of the support surface 80b comes into contact with the lower surface of the holding block 20.

As shown in FIG. 4, the support shaft 50 is inserted and supported through the through hole 81 of the support member 80 fixed to the holding block 20. The outer diameter of the support shaft 50 and the inner diameter of the through hole 81 may be fitted with a clearance fit, an intermediate fit, or a tight fit, but in order to achieve both vibration suppression and assembling, a tight clearance. It is desirable to use a fit. Specifically, the inner diameter of the through hole 81 is about several μm to several tens of μm larger than the outer diameter of the support shaft 50. As shown in FIG. 3, the substantially central position of the support shaft 50 whose both ends are fixed by the holding block 20 is further supported by the through hole 81 of the support member 80 fixed to the holding block 20. As shown in FIG. 1, when the paper sheets 100 transported at high speed in the transport path 70 rush between the reference roller 60 and the detection roller 12, this impact causes vibration to the support shaft 50 to which both ends are fixed. It can occur. By supporting the position substantially at the center of the support shaft 50 with the support member 80, the generation of vibration can be effectively suppressed. Further, even when vibration occurs, the generated vibration can be converged in a short time.

The shape of the support member 80 is not limited to the shapes shown in FIGS. 4 and 5. FIG. 6 is a perspective view showing another example of the support member 80. FIG. 7 is a three-view view showing the shape of the support member 80 shown in FIG. 7 (b) shows a front view, FIG. 7 (a) shows a plan view, and FIG. 7 (c) shows a right side view. As described above, the upper edge of the fixed surface 80a in which the through hole 82 for the screw 90 is formed may be continuous with the upper edge of the support surface 80b in which the through hole 81 for the support shaft 50 is formed. ..

The method of supporting the support shaft 50 is not limited to the methods shown in FIGS. 4 to 7. FIG. 8 is a schematic diagram showing another method of supporting the support shaft 50. As shown in FIG. 8A, the support member 80 may support a plurality of positions of the support shaft 50 fixedly held at both ends by the holding block 20. Even if there is a gap between the lower surface of the fixing portion 20a and the upper edge of the supporting member 80 as shown in FIG. 7, if the supporting member 80 is fixed to the fixing portion 20a of the holding block 20 by a fastening member such as a screw 90. , The effect of suppressing the movement of the support shaft 50 and suppressing the vibration can be obtained.

As shown in FIG. 8B, the support shaft 50 may be divided into a plurality of parts, and both ends of the support shafts 50a and 50b may be supported by the support member 80 and the holding block 20. If the support member 80 is a member having a thickness in the axial direction of the support shaft 50, one support member 80 can simultaneously support the two support shafts 50a and 50b. The mode is not limited to the mode in which the support shaft 50 is divided into two, and the support shaft 50 may be divided into three or more and each is supported by the support member 80 and the holding block 20 or two support members 80. It is preferable that the plurality of support shafts obtained by dividing the support shaft 50 are arranged on the same shaft, but if the support member 80 can be supported, the center of each shaft may be offset.

As shown in FIG. 8C, a through hole may be formed in the support shaft 50, and the support shaft 50 may be fixed to the support member 80 by a fastening member such as a screw 90 through which the through hole is inserted. .. In this case as well, the support shaft 50 may be fixed to the support member 80 at a plurality of locations.

The method of supporting the support shaft 50 by the plate-shaped support member 80 is not limited to the support by the through hole formed in the support member 80. Specifically, the support method by the support member 80 is not particularly limited as long as it can function as a deterrent member that suppresses deformation and movement of the support shaft 50 in at least one direction in the radial direction of the support shaft 50 to suppress vibration. FIG. 9 is a schematic view showing another support method by the support member 80. As shown in FIG. 9A, an arc portion matching the outer diameter of the support shaft 50 is formed on the support member 80, and a part of the outer circumference of the support shaft 50 is brought into contact with the arc portion to support the arc portion. There may be. The arc portion has, for example, a 1/4 arc shape along the outer diameter of the support shaft 50.

As shown in FIG. 9B, a U-shaped groove including an arc matching the outer diameter of the support shaft 50 is formed in the support member 80, and a part of the outer circumference of the support shaft 50 is formed in this groove portion. It may be in a mode of contacting and supporting. The arc portion has, for example, a semicircular shape along the outer diameter of the support shaft 50. When the paper leaf 100 rushes between the detection roller 12 and the reference roller 60 and the support shaft 50 vibrates in the diagonal direction connecting the lower left and upper right of FIG. 9, the shape of the support member 80 is changed in this diagonal direction. That is, the shape is such that the support shaft 50 is in contact with the support shaft 50 in the direction of vibration. As a result, the vibration of the support shaft 50 can be effectively suppressed.

In the present embodiment, an example in which the support member 80 is fixed to the holding block 20 is shown, but for example, the support member 80 may be fixed to the housing of the thickness detecting device for fixing the holding block 20. good. As long as the position of the support member 80 can be fixed, the method of fixing the support member 80 is not particularly limited.

In the present embodiment, an example is shown in which the support member 80 is mainly provided at a position substantially at the center of the support shaft 50 held at both ends by the holding block 20, but the position of the support member 80 is not particularly limited. The support member 80 is arranged at a position including at least one detection block 10 between the holding block 20 and the position where the support shaft 50 is held. In other words, the support shaft 50 is located between the position where the holding block 20 holds the end portion of the support shaft 50 and the position where the support member 80 functioning as a restraining member suppresses the movement of the support shaft 50 and suppresses vibration. The support member 80 is arranged to support at least one detection block 10.

In the present embodiment, an example in which the support member 80 is provided separately from the holding block 20 is shown, but the support member 80 may be integrally molded with the holding block 20. Further, the structure of the support member 80 is not particularly limited as long as the deformation and movement of the support shaft 50 can be suppressed and vibration can be suppressed in at least one direction. Further, the position where the support member 80 is provided is not particularly limited as long as the position where the vibration damping effect can be obtained according to the vibration mode of the support shaft 50.

As described above, in the thickness detection device according to the present embodiment, the support shaft 50 that supports a plurality of detection blocks 10 to which the detection rollers 12 are attached is supported by the support member 80. The support member 80 supports the support shaft 50 fixedly supported at both ends at at least one place other than both ends. The support member 80 is supported so as to suppress the vibration in the direction in which the support shaft 50 vibrates when detecting the thickness of the paper sheets 100. As a result, the generation of vibration of the support shaft 50 can be suppressed, and the generated vibration can be converged in a short time. By suppressing the vibration of the support shaft 50 when the high-speed paper leaves 100 rush between the detection roller 12 and the reference roller 60, the thickness of the paper leaves 100 can be detected with high accuracy. ..

As described above, the thickness detecting device according to the present invention is useful for suppressing the influence of vibration and detecting the thickness of paper sheets with high accuracy.

10 Detection block 11, 50, 61 Support shaft 12 Detection roller 13 Permanent magnet 14 Sleeve 20 Holding block 30 Sensor unit 31 Hall element 40 Leaf spring 51 Compression spring 60 Reference roller 70 Transport path 80 Support member 90 Screw

Claims (11)

A thickness detection device that detects the thickness of paper sheets transported between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers.
A plurality of detection blocks that rotatably support at least one detection roller facing the reference roller,
A support shaft that rotatably supports the plurality of detection blocks,
A holding portion that holds the support shaft with the plurality of detection blocks sandwiched between them,
An urging member for urging the detection roller toward the reference roller, and
A sensor unit that detects the amount of movement of the detection roller with respect to the reference roller, and
A deterrent member that suppresses vibration of the support shaft is provided between the holding portions .
The restraining member has a shape in which two surfaces, a fixed surface fixed to the holding portion and a support surface for holding the support shaft, are connected to each other.
A fixed portion having two surfaces corresponding to the fixed surface and the support surface is formed on the holding portion.
The restraining member is in a state where at least a part of the support surface is in contact with one surface of the fixing portion and at least a part of the fixing surface is in contact with the other surface of the fixing portion. Fixed to
A thickness detection device characterized by this. The first aspect of the present invention, wherein the restraining member is fixed to the holding portion in a state where at least a part of a surface different from the supporting surface and the fixing surface is in contact with the holding portion. Thickness detector. The thickness detecting device according to claim 2, wherein the different surface is a surface constituting the upper edge of the support surface. The thickness detecting device according to any one of claims 1 to 3 , wherein the restraining member is supported by inserting the support shaft into a through hole formed in the support surface of the restraining member. A thickness detection device that detects the thickness of paper sheets transported between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers.
A plurality of detection blocks that rotatably support at least one detection roller facing the reference roller,
A support shaft that rotatably supports the plurality of detection blocks,
A holding portion that holds the support shaft with the plurality of detection blocks sandwiched between them,
An urging member for urging the detection roller toward the reference roller, and
A sensor unit that detects the amount of movement of the detection roller with respect to the reference roller, and
A deterrent member between the holding portions that suppresses vibration of the support shaft
Equipped with
A thickness detecting device characterized in that the support shaft is fixed to the restraining member by a fastening member. The thickness detecting device according to claim 5 , wherein the fastening member is a screw. A thickness detection device that detects the thickness of paper sheets transported between a reference roller and a plurality of detection rollers based on the amount of movement of the detection rollers.
A plurality of detection blocks that rotatably support at least one detection roller facing the reference roller,
A support shaft that rotatably supports the plurality of detection blocks,
A holding portion that holds the support shaft with the plurality of detection blocks sandwiched between them,
An urging member for urging the detection roller toward the reference roller, and
A sensor unit that detects the amount of movement of the detection roller with respect to the reference roller, and
A deterrent member between the holding portions that suppresses vibration of the support shaft
Equipped with
The thickness detecting device, wherein the support shaft is composed of a plurality of shafts, and the restraining member supports the two shafts. The thickness detecting device according to any one of claims 5 to 7, wherein the restraining member is fixed to the holding portion. The support shaft supports at least one detection block between a position where the holding portion holds an end portion of the support shaft and a position where the restraining member suppresses vibration of the support shaft. The thickness detecting device according to any one of claims 1 to 8, wherein the thickness detecting device is characterized. The thickness detecting device according to any one of claims 1 to 9, wherein the restraining member has at least a part of the support shaft in contact with the restraining member to support the support shaft. The plurality of detection rollers are arranged side by side in a direction perpendicular to the transport direction of the paper sheets and parallel to the surface of the paper sheets .
The thickness according to any one of claims 1 to 10, wherein the entire width of the plurality of detection rollers is larger than the length of the paper sheets in the direction in which the plurality of detection rollers are arranged side by side. Detection device.

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