JP2012082034A - Opening and closing mechanism of device for detecting thickness of paper sheets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means capable of facilitating positioning of a lock lever and suppressing looseness occurring upon the clamping by means of a clamping member.SOLUTION: The opening and closing mechanism of a device 1 for detecting thickness of paper sheets comprises: a lower butting part 11 disposed on the end part of the side opposite to the opening and closing fulcrum 4 of a lower frame 3; an engagement pin 14 on the side surface of the lower frame 3; the upper butting part 10 of an upper frame 2; a transverse slide hole 21 on the side surface of the upper frame 2; an oblong hole 26; a lock lever 13 which has a turning fulcrum 17 fitting into the oblong hole 26, an inclined surface 19 to be engaged with an engagement pin 14 and an operation part 13a and turns around the turning fulcrum 17; a stopper 16 which locks the operation part 13a and restricts the turning; a spring member 15 which energizes the lock lever 13 in the engagement direction C; an adjustment plate 20 having a slide shaft 22 which fits into the transverse slide hole 21 and an inclined long hole 27 which fits into the turning fulcrum 17; and a positioning tool which supports the operation part 13a and forms a prescribed gap between the operation part 13a and the stopper 16.

Description

  The present invention relates to a paper sheet thickness detection device that detects the thickness of paper sheets such as banknotes in an automatic transaction apparatus such as a cash processing apparatus.

  A conventional paper sheet thickness detection device sandwiches a transported paper sheet and an upper frame configured to be opened and closed around an opening / closing fulcrum provided at one end of the lower frame in the transport direction of the paper sheet. A plurality of transport rollers for transporting, a detection roller and a reference roller for detecting the thickness of the sandwiched paper sheets, and a lock mechanism for locking the upper frame to the lower frame when the upper frame is closed, Opening and closing of the upper frame by applying a preload between the lower frame and the upper frame at the time of closing by the elastic body provided between the upper frame and absorbing the clearance due to the fitting tolerance existing in the bearing of the opening and closing fulcrum Therefore, the vertical fluctuation of the distance between the detection roller and the reference roller is prevented.

  The locking mechanism used in this paper sheet thickness detecting device is a "U" -shaped lock lever supported so as to be rotatable around a rotation fulcrum provided on the upper frame, and a rotation fulcrum. A notch having a slope provided on the opposite end of the frame and an engagement pin provided on the lower frame, and when the upper frame is closed, the lock lever is rotated about the rotation fulcrum, and the notch The upper frame is fixed to the lower frame by engaging the slope of the part with the engaging pin (see, for example, Patent Document 1).

  In such a lock mechanism that engages the inclined surface with the engagement pin, the reaction force due to the pressing force of the plurality of transport rollers, the reaction force due to the pressing force between the detection roller and the reference roller, and the reaction force due to the elastic body are all. Since it is necessary to receive the angle, the inclination angle θ (see FIG. 1) measured from the paper sheet conveyance direction on the slope of the notch must be reduced, and the positional accuracy between the upper frame and the lower frame can be accurately set. In order to achieve this, it is necessary to reduce the inclination angle θ.

  In order to reduce the inclination angle θ, if the position accuracy of the rotation fulcrum and the engagement pin is insufficient, the lower frame is engaged with the locus of the slope when the lock lever is rotated around the rotation fulcrum. Since the pin may not be included, generally, the rotation fulcrum and / or the engagement pin is an eccentric pin that forms a rotary head with the axis of the rotation shaft being eccentric, and after the position adjustment, the rotation shaft is An eccentric adjustment mechanism that is fixed by a fastening member such as a nut is provided (for example, see Patent Document 2).

JP 2002-179289 A (paragraphs 0017, 0024-0025, 0075-0079, FIGS. 1 and 7) Japanese Patent Laid-Open No. 7-97080 (paragraphs 0042-0052, FIGS. 1 and 3)

However, when the above-described eccentricity adjustment mechanism is provided on the rotation fulcrum or the engagement pin, in order to adjust the positions of the upper frame and the lower frame within a predetermined range, complicated adjustment is required, and the thickness of the paper sheet There is a problem that it takes time to assemble the detection device.
Further, the rotation fulcrum is loaded with a load when the lock lever is rotated and a load when the slope is engaged with the engagement pin, and the engagement pin is loaded with a load when the slope is engaged with the engagement pin. When these loads are repeatedly applied, there is a problem that loosening occurs in the fastening by the fastening member.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide means for facilitating positioning of a lock lever and suppressing loosening that occurs during fastening by a fastening member.

  In order to solve the above-described problems, the present invention has an upper frame that is openable and closable with respect to a lower frame around an opening / closing fulcrum provided at one end in the conveyance direction of paper sheets. In an opening / closing mechanism of a sheet thickness detecting device for detecting the thickness of a sheet by holding the sheet between a reference roller and a thickness detection roller, an end of the lower frame opposite to the opening / closing fulcrum A lower abutting portion provided on the upper frame, an engagement pin erected on the side surface of the lower frame, an upper abutting portion that contacts the lower abutting portion provided on the upper frame, and A lateral slide hole formed in a side surface, which is a long hole whose longitudinal direction is the conveyance direction, a vertical long hole whose longitudinal direction is the orthogonal direction of the conveyance direction, and a rotation fulcrum that fits into the vertical long hole, A slope that engages with the engaging pin; and an operating portion; A lock lever that pivots about the center, a stopper that locks the operation portion and restricts the lock lever from rotating in the direction of engagement with the engagement pin, and the lock lever includes the engagement pin. A spring member that is biased in the engagement direction, a slide shaft that fits into the lateral slide hole, an inclined elongated hole that fits into the rotation fulcrum and has a direction inclined from the transport direction as a longitudinal direction, And a positioning jig that supports the operation portion and forms a predetermined gap between the operation portion and the stopper, and determines the position of the rotation fulcrum of the lock lever. When the upper abutting portion and the lower abutting portion are brought into contact with each other, the operation portion is supported by the positioning jig, and the slope of the lock lever is engaged with the engagement pin, Due to the urging force of the spring member, the vertical hole and the tilt By moving the pivot point to be fitted to the elongated hole, and determining the position of the pivot point.

  As a result, the present invention can automatically determine the position of the rotation fulcrum and easily adjust the position of the lock lever, and mainly applies the repetitive load when using the sheet thickness detecting device. It is possible to obtain an effect that it is possible to suppress the looseness that is received by the upper frame and is generated in the fastening by the fastening member.

Explanatory drawing which shows the external appearance seen from the side of the paper sheet thickness detection apparatus of Example 1. Explanatory drawing which shows the cross section along the AA sectional line of FIG. 1 of the fastening member of Example 1. FIG. Explanatory drawing which shows the position adjustment operation | movement of the lock lever of Example 1. FIG. Explanatory drawing which shows the external appearance seen from the side of the paper sheet thickness detection apparatus of Example 2. Explanatory drawing which shows the open state of the upper frame of the paper sheet thickness detection apparatus of Example 2. FIG. Explanatory drawing which shows the position adjustment operation | movement of the lock lever of Example 2. FIG. Explanatory drawing which shows the automatic lock operation | movement of the lock lever of Example 2. FIG.

  Embodiments of an opening / closing mechanism of a paper sheet thickness detection device according to the present invention will be described below with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes a paper sheet thickness detecting device, which is a casing configured to be openable / closable around an opening / closing fulcrum 4 provided at one end of an upper frame 2 with respect to a lower frame 3. Paper sheets such as banknotes conveyed between the reference roller 6 provided on the lower frame 3 and the thickness detection roller 7 provided on the upper frame 2 and pressing the reference roller 6 with the pressing force Pch. It is used to detect the thickness of a paper sheet and to determine the presence or absence of a tape affixed to the paper sheet.

  Further, the sheet thickness detecting device includes a driving roller attached to the lower frame 3 along a sheet conveying direction (hereinafter simply referred to as a conveying direction B) indicated by an arrow B in FIG. Conveying rollers 8a and 8b comprising a pair of rollers each composed of a pressure roller attached to the upper frame 2 are provided, and the pressure roller of each conveying roller 8 presses the driving roller with a pressing force P.

When the upper frame 2 of this embodiment is closed by pushing it from above, the upper abutment portion 10 and the lower frame 3 of the upper frame 2 provided at the end of the opening / closing fulcrum 4 on the opposite side of the conveyance direction B are provided. It is fixed to the lower frame 3 by an auto-lock mechanism that automatically locks with the lower abutting portion 11 in contact.
The auto-lock mechanism of the present embodiment includes a lock lever 13 having an operation portion 13a, an engagement pin 14 that engages the lock lever 13 when the upper frame 2 is closed, a spring member 15, a stopper 16, and the like.

  The lock lever 13 is a T-shaped plate member provided on the outer side of both side surfaces of the upper frame 2 and is rotatable about a rotation fulcrum 17 fixed to the first end thereof. The operation portion 13a is provided on the second end side, and the third end portion, which is the end portion of the engagement portion 13b provided in the central portion of the first and second end portions, is configured. The tip 18 is provided with an inclined portion 18 for operating the auto-lock mechanism.

  Further, on the upper frame 2 side of the inclined portion 18, when the upper frame 2 is closed, the conveying direction B toward the opening / closing fulcrum 4 that engages with the engaging pin 14 that is erected outside the side surface of the lower frame 3. When the engagement between the engaging pin 14 and the inclined surface 19 is released, the operating lever 13a is used to move the lock lever 13 around the rotation fulcrum 17 to move the inclined surface 19 to the lower side. It is rotated in the direction opposite to the direction of engagement with the engagement pin 14 (arrow C direction and engagement direction C shown in FIG. 3).

Further, the lock lever 13 is pulled by a spring member 15 such as a tension coil spring attached between the central portion of the engaging portion 13 b and the upper frame 2, and the inclined surface 19 is centered on the rotation fulcrum 17. It is biased in a direction to rotate in the engagement direction C.
The stopper 16 is provided below the operation portion 13 a on the side surface of the upper frame 2, and the operation portion 13 a is locked by the upper surface of the stopper 16 to rotate the lock lever 13 in the engagement direction C. It has a function to limit.

  An adjustment plate 20 for adjusting the position of the rotation fulcrum 17 is provided inside the side surface of the upper frame 2 of the present embodiment, and the adjustment plate 20 is provided on the side surface of the upper frame 2 and is conveyed. A slide shaft 22 that fits into a horizontal slide hole 21 that is a rectangular long hole having the direction B as a longitudinal direction is provided. As shown in FIG. 2, the slide shaft 22 is adjusted by a fixing means such as press-fitting or brazing. It is fixed to the plate 20.

Further, a screw portion 22a is provided at the tip of the slide shaft 22, and a nut 23 as a fastening member screwed to the screw portion 22a is used to place the adjustment plate 20 inside the side surface of the upper frame 2 via a washer 24. It comes to conclude.
Accordingly, the adjustment plate 20 is supported so as to be movable in the transport direction B with respect to the upper frame 2, and when the movement is stopped, it is fastened and fixed to the side surface of the upper frame 2 by the nut 23.

  Further, as shown in FIG. 1, a rectangular vertically long shape having a longitudinal direction D (see FIG. 3) perpendicular to the conveying direction B, into which the rotation fulcrum 17 of the lock lever 13 is fitted, is mounted on the side surface of the upper frame 2. A hole 26 is provided, and the adjustment plate 20 is fitted with the rotation fulcrum 17 at a predetermined angle from the conveyance direction B, and a direction inclined downward from the conveyance direction B toward the opening / closing fulcrum 4 is a longitudinal direction. A rectangular inclined long hole 27 is provided. By combining the vertical elongated hole 26 and the inclined elongated hole 27, the rotation fulcrum 17 is rotatably supported at four points (actually two points). Is configured to do.

The opening / closing mechanism of the present embodiment includes an upper frame 2, a lower frame 3, an opening / closing fulcrum 4, a horizontal slide hole 21 and a vertically long hole 26 in the upper frame 2, an adjustment plate 20, and a slide shaft 22 thereof in addition to the above-described auto-lock mechanism. And the inclined elongated hole 27 and the like.
In the sheet thickness detecting device 1 having such an opening / closing mechanism, the lock lever 13 is pulled by the spring member 15 when the upper frame 2 is opened, and the operation unit 13a is operated by the stopper 16 provided on the side surface of the upper frame 2. Stops in a locked state.

  Further, when the upper frame 2 is closed, the engaging portion of the lock lever 13 is brought into contact with the upper abutting portion 10 provided on the upper frame 2 and the lower abutting portion 11 provided on the lower frame 3. A slope 19 provided on 13b is engaged with an engaging pin 14 fixed to the lower frame 3, and the driving roller and pressure roller of each conveying roller 8, the reference roller 6 and the thickness detecting roller 7 are pressed. The reciprocating conveyance of the paper sheets in the conveyance direction B becomes possible.

Further, when the upper frame 2 is closed, the slope 19 of the lock lever 13 is pulled by the spring member 15 while being engaged with the engagement pin 14, and the upper frame is caused by the component force in the orthogonal direction D due to the inclination angle θ of the slope 19. 2 is pressed against the lower frame 3, and the clearance existing in the bearing of the opening / closing fulcrum 4 is absorbed.
In this case, the urging force Fsp of the spring member 15 is set so that the total pressing force P of the conveying rollers 8 and the pressing force Pch of the thickness detection roller 7 can be pressed when the upper frame 2 is closed. .

On the other hand, in order for the operator to easily release the lock by the lock lever 13, it is desirable to make the operation force Fop applied to the operation portion 13a of the lock lever 13 as small as possible. For this purpose, the biasing force Fsp of the spring member 15 is desired. Must be set smaller.
In order to reduce the operating force Fop and press down the total pressing force P of each conveying roller 8 and the pressing force Pch of the thickness detection roller 7 in a state where the biasing force Fsp of the spring member 15 is small, the lock lever of this embodiment is used. The inclination angle θ of the 13 slopes 19 is set small.

Hereinafter, the position adjustment of the rotation fulcrum 17 of the lock lever 13 of this embodiment will be described with reference to FIG.
As shown in FIG. 3, the position adjustment of the lock lever 13 of this embodiment is performed with the stopper 16 being in contact with the upper abutting portion 10 of the upper frame 2 and the lower abutting portion 11 of the lower frame 3. A positioning jig 29 that supports the operation portion 13a from below so as to form a predetermined gap between the upper surface and the lower surface of the operation portion 13a of the lock lever 13 is located outside the side surface of the upper frame 2 and below the operation portion 13a. Installed in

  When adjusting the position of the lock lever 13 when assembling the paper sheet thickness detection device 1, first, the nut 23 provided on the slide shaft 22 that fastens the adjustment plate 20 and the upper frame 2 is removed. The upper abutting portion 10 and the lower abutting portion 11 are brought into contact with each other, and the positioning jig 29 is installed below the operation portion 13 a between the stopper 16 and the lock lever 13.

  At this time, the lock lever 13 is supported so as to be rotatable in the engagement direction C and the opposite direction around the rotation fulcrum 17 with a predetermined gap formed between the operation portion 13a and the stopper 16. The adjustment plate 20 is supported so that its slide shaft 22 can move in the transport direction B along the horizontal slide hole 21 of the upper frame 2, and the pivot fulcrum 17 fitted into the inclined elongated hole 27 is The frame 2 can move in the orthogonal direction D along the longitudinal hole 26.

  As a result, the lock lever 13 is pulled by the urging force Fsp of the spring member 15 and is rotated in the engagement direction C because the operation portion 13 a is supported by the positioning jig 29, and the inclined surface 19 is moved to the engagement pin 14. The pivot fulcrum 17 automatically moves in the orthogonal direction D along the longitudinal elongated hole 26 while pushing the inclined elongated hole 27 to the engaging position, and the height of the pivot fulcrum 17 with respect to the upper frame 2 and the conveying direction B The position is determined.

Further, the adjustment plate 20 is pushed by the rotation fulcrum 17 with which the inclined long hole 27 is fitted, and the slide shaft 22 moves in the conveyance direction B while being guided by the horizontal slide hole 21, so that the adjustment plate 20 is conveyed. The position in direction B is determined.
In this state, the assembly operator fastens the adjustment plate 20 and the upper frame 2 with the nut 23 to fix the adjustment plate 20 to the upper frame 2, removes the positioning jig 29 of the lock lever 13, and turns the pivot fulcrum 17. Complete the position adjustment.

  In the sheet thickness detecting device 1 in which the position of the rotation fulcrum 17 is determined in this way, the upper frame 2 is opened when the operating force Fop (see FIG. 1) is applied to the operating portion 13a of the lock lever 13. Then, the operation unit 13a stops with the stopper 16 of the upper frame 2 being engaged.

  Further, when the upper frame 2 is closed, if the end of the opened upper frame 2 opposite to the opening / closing fulcrum 4 is pushed from above, the operation portion 13a of the lock lever 13 remains in contact with the stopper 16 and the lock is maintained. When the inclined portion 18 at the tip of the engaging portion 13 b of the lever 13 is pressed against the engaging pin 14 and further pushes the upper frame 2, the rotation fulcrum 17 is supported by the vertically elongated hole 26 and the inclined elongated hole 27 of the adjustment plate 20. In this state, the lock lever 13 rotates in the direction opposite to the engagement direction C around the rotation fulcrum 17 against the biasing force Fsp of the spring member 15, and the inclined surface 19 moves to the position of the engagement pin 14. Then, the lock lever 13 is pulled by the urging force Fsp of the spring member 15 to rotate in the engagement direction C around the rotation fulcrum 17, and the inclined surface 19 automatically engages with the engagement pin 14 to cause the upper projection. The abutting portion 10 and the lower abutting abutting portion 11 are in contact with each other. The upper frame 2 is closed in condition, become a pressing force of defining the pressing force Pch of the pressing force P and the thickness detection rollers 7 of each of the conveying rollers 8, allows detection of the thickness of the sheet.

  As described above, in this embodiment, the inclined long hole 27 of the adjustment plate 20 provided with the slide mechanism in the transport direction B including the slide shaft 22 and the horizontal slide hole 21 and the vertical long hole 26 provided in the upper frame 2 are provided. The rotation fulcrum 17 is supported by the combination, the upper abutment portion 10 and the lower abutment portion 11 are abutted, and the operation portion 13a of the lock lever 13 is supported by the positioning jig 29. The adjustment plate 20 is moved along the longitudinal hole 26 while moving in the transport direction B, and the position of the rotation fulcrum 17 is automatically determined and the adjustment plate 20 is fastened at the moved position. Adjustment can be performed easily.

  Further, the rotation fulcrum 17 is supported by a combination of the inclined long hole 27 of the adjustment plate 20 and the vertical long hole 26 of the upper frame 2, and the slide shaft 22 fixed to the adjustment plate 20 is fitted into the horizontal slide hole 21 of the upper frame 2. Therefore, when the upper frame 2 is opened and closed, the load applied by the lock lever 13 is mainly applied to the vertical frame 26 provided in the upper frame 2 via the vertical elongated hole 26 provided in the upper frame 2, the inclined elongated hole 27, and the slide shaft 22. It can be received by the slide hole 21, and loosening of the fastening member caused by repeated load when the paper sheet thickness detection device 1 is used can be suppressed.

In the present embodiment, the inclined long hole 27 is described as being a long hole whose longitudinal direction is a direction inclined from the conveying direction B toward the opening / closing fulcrum 4 in a direction descending from the conveying direction B at a predetermined angle. However, the inclination direction may be the reverse direction.
Moreover, although the horizontal slide hole 21, the vertical elongated hole 26, and the inclined elongated hole 27 have been described as rectangular elongated holes, a semicircular arc inscribed in one short side of the rectangle and the two long sides on both sides of the rectangular long hole is elongated. It may be an oblong slot formed on both sides in the direction.

  As described above, in this embodiment, the sheet has the upper frame that can be opened and closed with respect to the lower frame around the opening / closing fulcrum provided at one end in the conveyance direction B of the paper sheet. The opening / closing mechanism of the sheet thickness detection device that detects the thickness of the sheet by holding the sheet between the reference roller and the thickness detection roller is located at the end of the lower frame opposite the opening / closing fulcrum. The lower abutting portion provided, the engaging pin erected on the side surface of the lower frame, the upper abutting portion contacting the lower abutting portion provided on the upper frame, and the conveyance formed on the side surface of the upper frame A horizontal slide hole, which is a long hole with the direction B as the longitudinal direction, a vertical hole with the orthogonal direction D of the transport direction B as the longitudinal direction, a rotation fulcrum that fits into the vertical hole, and an engagement pin A lock lever that has a slope and an operation part and rotates around a rotation fulcrum; A stopper that restricts rotation of the clever in the engagement direction to the engagement pin, a spring member that urges the lock lever in the engagement direction to the engagement pin, a slide shaft that fits in the lateral slide hole, An adjustment plate having an inclined oblong hole whose longitudinal direction is the direction inclined from the conveyance direction B and fitted to the rotation fulcrum, a fastening member that fastens the adjustment plate to the side surface of the upper plate, and an operation unit that supports and operates A positioning jig that forms a predetermined gap between the stopper and the stopper. When determining the position of the rotation fulcrum of the lock lever, the fastening by the fastening member is loosened, and the upper abutting part and the lower abutting part When the operating part is supported by the positioning jig and the slope of the lock lever is engaged with the engaging pin, the vertical elongated hole and the inclined elongated hole are fitted by the biasing force of the spring member. Move the rotation fulcrum to determine the position of the rotation fulcrum The position of the rotation fulcrum is determined by fastening the adjustment plate moved in the transport direction B by the slide shaft fitted in the slide hole with the inclined elongated hole moving with the movement of the rotation fulcrum. By determining the position, the position of the rotation fulcrum can be automatically determined, the position of the lock lever can be easily adjusted, and the repeated load when using the paper sheet thickness detection device Can be received mainly by the upper frame, and the looseness generated in the fastening by the fastening member can be suppressed.

Hereinafter, the opening / closing mechanism of the paper sheet thickness detection device of this embodiment will be described with reference to FIGS.
In addition, the same part as the said Example 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
As shown in FIG. 4, the adjustment plate 20 of the present embodiment is brought into contact with the rotation fulcrum 17, and is inclined at a predetermined angle from the conveyance direction B toward the opening / closing fulcrum 4 and downward from the conveyance direction B. The surface 31 is provided, and is configured to support the rotation fulcrum 17 to be rotatable at three points on both sides and the lower side in the conveyance direction B by combining the vertically long hole 26 and the inclined surface 31. Yes.

  Further, the lock lever 13 of the present embodiment is provided with an arm portion 13c formed on the opposite side of the operation portion 13a provided on the second end side with the rotation fulcrum 17 interposed therebetween, and the arm portion 13c. A fourth end portion that is an end portion of the upper frame 2 is locked to a lower surface of a stopper 33 provided between the rotation fulcrum 17 on the side surface of the upper frame 2 and the opening / closing fulcrum 4.

Further, the stopper 33 has a function of limiting the rotation of the lock lever 13 in the engagement direction C with respect to the engagement pin 14, similarly to the stopper 16 of the first embodiment.
In the case of releasing the engagement between the slope 19 of the lock lever 13 and the engagement pin 14 of the present embodiment, the lock lever 13 is centered on the rotation fulcrum 17 by the operation portion 13a as in the first embodiment. The inclined surface 19 is rotated in the direction opposite to the engaging direction C.

The auto-lock mechanism of the present embodiment includes a lock lever 13 having an arm portion 13c, an engagement pin 14, a spring member 15, a stopper 33, and the like.
In addition to the auto-lock mechanism, the opening / closing mechanism includes an upper frame 2, a lower frame 3, an opening / closing fulcrum 4, a horizontal slide hole 21 and a vertical elongated hole 26 in the upper frame 2, an adjustment plate 20, its slide shaft 22 and an inclined surface. 31 or the like.

  In the sheet thickness detecting device 1 having the opening / closing mechanism of the present embodiment, when the upper frame 2 is opened, the lock lever 13 is pulled by the spring member 15 and provided on the side surface of the upper frame 2 as shown in FIG. The arm portion 13c is stopped by the stopper 33 thus stopped.

Hereinafter, the position adjustment of the rotation fulcrum 17 of the lock lever 13 of this embodiment will be described with reference to FIG.
When the position of the lock lever 13 is adjusted when assembling the paper sheet thickness detection device 1 of the present embodiment, first, the lock plate 13 is provided on the slide shaft 22 that fastens the adjustment plate 20 and the upper frame 2. The nut 23 is loosened, the upper abutting portion 10 and the lower abutting portion 11 are brought into contact with each other, and a positioning jig 29 similar to that of the first embodiment is installed below the operation portion 13 a of the lock lever 13.

  At this time, the lock lever 13 rotates the lock lever 13 in the engagement direction C around the rotation fulcrum 17 and in the opposite direction with a predetermined gap formed between the arm portion 13 c and the stopper 33. The adjustment plate 20 is supported so as to be movable, and the slide shaft 22 is supported so as to be movable in the transport direction B along the horizontal slide hole 21 of the upper frame 2, and the rotation fulcrum 17 is a vertically elongated hole 26 of the upper frame 2. It is possible to move in the orthogonal direction D.

  As a result, the lock lever 13 is pulled by the urging force Fsp of the spring member 15 and is rotated in the engagement direction C because the operation portion 13 a is supported by the positioning jig 29, and the inclined surface 19 is moved to the engagement pin 14. The rotational fulcrum 17 automatically moves in the orthogonal direction D along the longitudinal hole 26 to the position where it is engaged, and the height of the rotational fulcrum 17 relative to the upper frame 2 and the position in the transport direction B are determined.

  In this state, the assembly operator guides the slide shaft 22 to the horizontal slide hole 21 to move the adjustment plate 20 in the transport direction B, and abuts the inclined surface 31 against the rotation fulcrum 17 to adjust the adjustment plate 20. The adjustment plate 20 and the upper frame 2 are fastened by the nut 23 to fix the adjustment plate 20 to the upper frame 2, and the positioning jig 29 of the lock lever 13 is removed to rotate the fulcrum 17. Complete the position adjustment.

  In the sheet thickness detecting device 1 in which the position of the rotation fulcrum 17 is determined in this way, the upper frame 2 is opened when the operating force Fop (see FIG. 1) is applied to the operating portion 13a of the lock lever 13. Then, the arm 13c stops with the stopper 33 of the upper frame 2 locked (see FIG. 5).

  When the upper frame 2 is closed, as shown in FIG. 7, if the end of the opened upper frame 2 opposite to the opening / closing fulcrum 4 is pushed from above with a force Fc, the arm 13c of the lock lever 13 is stopped. The inclined portion 18 at the tip of the engaging portion 13b of the lock lever 13 is pressed against the engaging pin 14 while being in contact with the lock lever 13, and the rotation fulcrum 17 is indicated by an arrow E in FIG. When the upper frame 2 is pushed in further upward until it comes into contact with the upper short side, the lock lever 13 resists the urging force Fsp of the spring member 15 and engages in the engagement direction C around the rotation fulcrum 17. When the inclined surface 19 moves to the position of the engagement pin 14, the lock lever 13 is pulled by the urging force Fsp of the spring member 15 and engages around the rotation fulcrum 17. It rotates in the direction C, and the inclined surface 19 is the engagement pin 1. The upper frame 2 is closed in a state where the upper abutting portion 10 and the lower abutting portion 11 are in contact with each other, and the pressing force P of each conveying roller 8 and the pressing force of the thickness detecting roller 7 are closed. Pch becomes a specified pressing force, and the thickness of the paper sheet can be detected.

  As described above, in this embodiment, the rotation fulcrum 17 is fitted into the vertically long hole 26 provided in the upper frame 2, the upper abutting portion 10 and the lower abutting portion 11 are abutted, and the lock lever 13 is operated. By supporting the portion 13a with the positioning jig 29, the rotation fulcrum 17 moves along the elongated hole 26, and the position of the rotation fulcrum 17 is automatically determined. The adjustment plate 20 provided with the slide mechanism in the conveyance direction B is moved in the conveyance direction B, the inclined surface 31 is brought into contact with the rotation fulcrum 17, and the adjustment plate 20 is fastened at that position. The position adjustment of 13 can be easily performed.

  In addition, the slide shaft 22 fixed to the adjustment plate 20 is supported by supporting the rotation fulcrum 17 at three points on both sides and the lower side in the conveying direction B by combining the inclined surface 31 of the adjustment plate 20 and the vertically long hole 26 of the upper frame 2. Is fitted into the horizontal slide hole 21 of the upper frame 2, so that the load due to the lock lever 13 when the upper frame 2 is opened and closed is mainly via the vertical hole 26 provided in the upper frame 2 and the inclined surface 31. It can be received by the horizontal slide hole 21 provided in the upper frame 2 and, after the tip of the engaging portion 13b of the lock lever 13 comes into contact with the engaging pin 14 when the upper frame 2 is closed, the rotation fulcrum 17 Is moved until it hits the upper short side of the vertically long hole 26, the time until the upper frame 2 is closed becomes longer, and the impact load applied to the rotation fulcrum 17 of the lock lever 13 can be reduced. Leaf thickness Loosening of the fastening member caused by repeated loads during use of the detection apparatus 1 can be further suppressed.

In the present embodiment, the inclined surface 31 is described as being inclined at a predetermined angle from the conveyance direction B toward the opening / closing fulcrum 4 in a direction descending from the conveyance direction B. However, even if the inclination direction is the reverse direction, Good.
Moreover, although the horizontal slide hole 21 and the vertical elongated hole 26 were described as rectangular elongated holes, semicircular arcs inscribed in one short side of the rectangle and two long sides on both sides thereof are formed on both sides in the longitudinal direction. It may be an oblong slot.

  As described above, in this embodiment, the sheet has the upper frame that can be opened and closed with respect to the lower frame around the opening / closing fulcrum provided at one end in the conveyance direction B of the paper sheet. The opening / closing mechanism of the sheet thickness detection device that detects the thickness of the sheet by holding the sheet between the reference roller and the thickness detection roller is located at the end of the lower frame opposite the opening / closing fulcrum. Formed on the side surface of the upper frame, the lower abutting portion provided, the engaging pin erected on the side surface of the lower frame, the upper abutting portion contacting the lower abutting portion provided on the upper frame, A horizontal slide hole that is a long hole with the conveyance direction B as the longitudinal direction, a vertical hole with the orthogonal direction D of the conveyance direction B as the longitudinal direction, a pivot point that fits into the vertical hole, and an engagement pin And an arm portion formed on the opposite side of the operation portion across the rotation fulcrum. A lock lever that rotates around a fulcrum, a stopper that locks the arm portion to limit the rotation of the lock lever in the engagement pin direction, and an engagement direction of the lock lever in the engagement pin An adjustment plate having a spring member that urges the slide plate, a slide shaft that fits into the horizontal slide hole, an inclined surface that contacts the rotation fulcrum and is inclined at a predetermined angle from the conveyance direction B, and the adjustment plate is attached to the upper plate. When determining the position of the rotation fulcrum of the lock lever, including a fastening member that is fastened to the side surface, and a positioning jig that supports the operation portion and forms a predetermined gap between the arm portion and the stopper, When the fastening by the fastening member is loosened, the upper abutting part and the lower abutting part are brought into contact with each other, the operation part is supported by the positioning jig, and the slope of the lock lever is engaged with the engaging pin, the spring member Fits into the elongated hole by the urging force of The moving fulcrum is moved to determine the position of the rotating fulcrum, and the adjusting plate is moved by the slide shaft fitted in the horizontal slide hole so that the inclined plate is brought into contact with the rotating fulcrum. The position of the pivoting fulcrum of the lock lever is fixed and the position of the pivoting fulcrum is automatically determined to easily adjust the position of the lock lever and detect the sheet thickness. When the apparatus is used, a repetitive load is mainly received by the upper frame, and loosening that occurs in the fastening by the fastening member can be suppressed.

  Further, when the upper frame is closed, the inclined portion at the tip of the engaging portion of the lock lever comes into contact with the engaging pin and moves until the rotation fulcrum hits the upper short side of the vertically long hole. It takes a long time to close the cover, and the impact load on the rotation fulcrum of the lock lever can be reduced.

DESCRIPTION OF SYMBOLS 1 Paper sheet thickness detection apparatus 2 Upper frame 3 Lower frame 4 Opening / closing fulcrum 6 Reference roller 7 Thickness detection roller 8, 8a, 8b Conveyance roller 10 Upper abutting part 11 Lower abutting part 13 Lock lever 13a Operation part 13b Engagement Joint portion 13c Arm portion 14 Engagement pin 15 Spring member 16, 33 Stopper 17 Rotating fulcrum 18 Inclined portion 19 Inclined surface 20 Adjustment plate 21 Lateral slide hole 22 Slide shaft 22a Screw portion 23 Nut 24 Washer 26 Vertical elongated hole 27 Inclined elongated hole 29 Positioning jig 31 Inclined surface

Claims (4)

Centering on an opening / closing fulcrum provided at one end in the conveyance direction of the paper sheet, the upper frame is provided so as to be openable / closable with respect to the lower frame, and the conveyed paper sheet is a reference roller and a thickness detection roller. In the opening / closing mechanism of the paper sheet thickness detecting device that detects the thickness of the paper sheet by sandwiching with
A lower abutting portion provided at an end of the lower frame opposite to the opening / closing fulcrum;
An engagement pin erected on the side surface of the lower frame;
An upper abutting portion that contacts the lower abutting portion provided on the upper frame;
A lateral slide hole formed in a side surface of the upper frame, which is a long hole whose longitudinal direction is the transport direction, and a vertical long hole whose longitudinal direction is the orthogonal direction of the transport direction,
A lock lever that rotates around the rotation fulcrum, having a rotation fulcrum that fits into the elongated hole, a slope that engages with the engagement pin, and an operation portion;
A stopper that locks the operation portion and restricts rotation of the lock lever in the engagement direction with the engagement pin;
A spring member for urging the lock lever in the direction of engagement with the engagement pin;
An adjustment plate having a slide shaft that fits into the lateral slide hole, and an inclined elongated hole that fits into the rotation fulcrum and has a direction inclined from the transport direction as a longitudinal direction;
A positioning jig that supports the operation unit and forms a predetermined gap between the operation unit and the stopper,
When determining the position of the pivot fulcrum of the lock lever, the upper abutment portion and the lower abutment portion are brought into contact with each other, the operation portion is supported by the positioning jig, and the slope of the lock lever is When engaged with the engaging pin, the rotational fulcrum fitted to the longitudinal elongated hole and the inclined elongated hole is moved by the urging force of the spring member to determine the position of the rotational fulcrum. An opening / closing mechanism for a paper sheet thickness detecting device. In the opening / closing mechanism of the paper sheet thickness detection device according to claim 1,
A fastening member for fastening the adjustment plate to a side surface of the upper plate;
When determining the position of the pivot fulcrum of the lock lever, the fastening by the fastening member is loosened, and when the position of the pivot fulcrum is determined, the inclined elongated hole that moves with the movement of the pivot fulcrum, The adjustment plate moved in the transport direction by the slide shaft fitted in the lateral slide hole is fastened by the fastening member at the position, and the position of the rotation fulcrum is determined at the determined position. An open / close mechanism for a sheet thickness detecting device. Centering on an opening / closing fulcrum provided at one end in the conveyance direction of the paper sheet, the upper frame is provided so as to be openable / closable with respect to the lower frame, and the conveyed paper sheet is a reference roller and a thickness detection roller. In the opening / closing mechanism of the paper sheet thickness detecting device that detects the thickness of the paper sheet sandwiched between
A lower abutting portion provided at an end of the lower frame opposite to the opening / closing fulcrum;
An engagement pin erected on the side surface of the lower frame;
An upper abutting portion that contacts the lower abutting portion provided on the upper frame;
A lateral slide hole formed in a side surface of the upper frame, which is a long hole whose longitudinal direction is the transport direction, and a vertical long hole whose longitudinal direction is the orthogonal direction of the transport direction,
A rotation fulcrum that fits into the longitudinal hole, a slope that engages with the engagement pin, an operation part, and an arm part that is formed on the opposite side of the operation part across the rotation fulcrum. A lock lever that pivots about the pivot point;
A stopper that locks the arm portion and restricts rotation of the lock lever in the engagement direction with the engagement pin;
A spring member for urging the lock lever in the direction of engagement with the engagement pin;
An adjustment plate having a slide shaft that fits into the lateral slide hole, and an inclined surface that contacts the rotation fulcrum and is inclined at a predetermined angle from the transport direction;
A positioning jig that supports the operation portion and forms a predetermined gap between the arm portion and the stopper,
When determining the position of the pivot fulcrum of the lock lever, the upper abutment portion and the lower abutment portion are brought into contact with each other, the operation portion is supported by the positioning jig, and the slope of the lock lever is The paper is characterized in that when the engagement pin is engaged, the rotation fulcrum fitted in the vertically long hole is moved by the urging force of the spring member to determine the position of the rotation fulcrum. Opening and closing mechanism of leaf thickness detector. In the opening / closing mechanism of the paper sheet thickness detecting device according to claim 3,
A fastening member for fastening the adjustment plate to a side surface of the upper plate;
When determining the position of the rotation fulcrum of the lock lever, the fastening by the fastening member is loosened, and when the position of the rotation fulcrum is determined, the adjustment plate is moved by the slide shaft fitted in the lateral slide hole The inclined surface is brought into contact with the rotation fulcrum, and the adjustment plate is fastened with the fastening member at the position to determine the position of the rotation fulcrum of the lock lever. Opening / closing mechanism of thickness detector.

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