JP3469097B2 - Sheet thickness detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet thickness detecting device for detecting the thickness of a sheet.

[0002]

2. Description of the Related Art In a banknote processing machine or the like, a sheet thickness detecting device for detecting the thickness of a sheet is used in order to multiplex the bills and to index the bills to which a tape or the like is attached. As a conventional one of this type of sheet thickness detecting device, for example,
There is one disclosed in Japanese Patent Laid-Open No. 2-49105 (Japanese Patent No. 2567279). This sheet thickness detecting device has a reference roller whose position is fixed and a movable roller which is displaceable so as to face the reference roller with a sheet conveying path interposed therebetween. The thickness of the sheet passing between the reference roller and the movable roller is detected.

[0003]

However, in general,
A small amount of dust or dirt is attached to the circulating bill, and in the device that detects the thickness of the bill from the amount of displacement of the movable roller as described above, the reference roller and the movable roller that contact the bill,
It is easy for dust and dirt to move from banknotes and adhere, or for banknote ink to adhere, and once dust, etc., adheres to these rollers, a large amount of dirt and ink attaches at once and the movable roller's There is a problem that a large error occurs in the displacement detection result. Therefore, an object of the present invention is to provide a sheet thickness detection device capable of accurately detecting the sheet thickness by preventing foreign matter such as dust, dust, or ink from adhering to the roller. .

[0004]

In order to achieve the above object, a sheet thickness detecting apparatus according to claim 1 of the present invention is arranged such that a position-fixed reference roller is opposed to the reference roller with a sheet conveying path interposed therebetween. And a displaceable movable roller provided so as to detect the thickness of a sheet passing between the reference roller and the movable roller from the displacement amount of the movable roller. It is characterized in that a silicone oil supply means for supplying silicone oil to the outer peripheral surface of the movable roller is provided. As a result, since the silicone oil is supplied to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller by the silicone oil supply means, the silicone oil is collected on the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Prevents adhesion of foreign matter such as dust, dust, and ink.

A sheet thickness detecting device according to a second aspect of the present invention is the sheet thickness detecting device according to the first aspect, wherein the silicone oil supply means contacts the reference roller and rotates together with the outer peripheral surface of the reference roller. On the other hand, a reference roller side silicone oil supply roller for supplying silicone oil and a movable roller side silicone oil supply roller for supplying silicone oil to the outer peripheral surface of the movable roller while making contact with the movable roller and rotating together. Is characterized by. As a result, the reference-roller-side silicone oil supply roller supplies silicone oil while rotating in contact with the outer peripheral surface of the reference roller, and the movable roller while rotating in contact with the outer peripheral surface of the movable roller. Since the side silicone oil supply roller supplies silicone oil, the silicone oil can be stably supplied to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Therefore, this silicone oil further prevents foreign matter such as dust, dust, or ink from adhering to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller.

The sheet thickness detecting apparatus according to claim 3 of the present invention is the sheet thickness detecting apparatus according to claim 1 or 2, further comprising a reference roller side which comes into contact with the reference roller and scrapes foreign matter on the outer peripheral surface of the reference roller. It has a scraping member and a movable-roller-side scraping member that comes into contact with the movable roller and scrapes foreign matter on the outer peripheral surface of the movable roller. As a result, the reference-roller-side scraping member comes into contact with the reference roller to scrape off the foreign matter on the outer peripheral surface of the reference roller, and the movable-roller-side scraping member comes into contact with the movable roller and the outer peripheral surface of the movable roller. Since the foreign matter is scraped off, foreign matter such as dust and dirt does not remain on the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sheet thickness detecting device of the present invention will be described below with reference to the drawings. This sheet thickness detecting device is built in the bill processing machine and detects the thickness of a bill as a sheet.

The sheet thickness detecting device is arranged below the conveying path 11 for conveying bills in a fixed direction (from left to right in FIG. 1) and has an axis line in a horizontal direction orthogonal to the bill conveying direction. A position-fixed reference fixed shaft 12, and a position-fixed cylindrical reference roller 13 which is rotatably supported coaxially with the reference fixed shaft 12 and which rotates in synchronization with a banknote conveyance driving means (not shown). , Standard fixed shaft 1
2, the fixed shaft 15 is fixed in parallel on the opposite side through the transport path 11 and at different positions in the banknote transport direction, and one end side is rotatably supported by the fixed shaft 15. Connecting arm 16 and the connecting arm 16
A support shaft 17 mounted on the opposite side of the fixed shaft 15 so as to be parallel to the fixed shaft 15, and a cylindrical movable roller 1 which is rotatably supported coaxially with the support shaft 17.
8 and. Here, the movable roller 18 is provided so as to face the reference roller 13 with the banknote transport path 11 interposed therebetween.

Further, the sheet thickness detecting device is composed of the connecting arm 1
6 has a spring (not shown) that constantly urges the reference roller 13 toward the reference roller 13. Therefore, the movable roller 18 causes the banknotes along the conveyance path 11 to move toward the reference roller 13 and the movable roller 1.
When it is conveyed to the reference roller 13, the connection arm 16 is rotated about the fixed shaft 15 by the thickness of the banknote.

Further, in the sheet thickness detecting device, the movable roller 18 is provided on the opposite side of the movable roller 18 with respect to the reference roller 13.
The detection mechanism unit 22 detects the thickness of a bill passing between the reference roller 13 and the movable roller 18 by detecting the displacement amount of the.

The detection mechanism section 22 has a position-fixed rotary shaft 23 arranged parallel to the movable roller 18 on the opposite side of the transport path 11 and in the banknote transport direction.
And an angle sensor 24 for detecting the rotation angle of the rotation shaft 23.
And a detection arm 25 whose one end is fixed to the rotary shaft 23.
And a support shaft 26 mounted on the opposite side of the detection arm 25 to the rotation shaft 23 so as to be parallel to the rotation shaft 23.
And a cylindrical auxiliary roller 27 having a smaller diameter than the reference roller 13 and the movable roller 18, which is rotatably supported coaxially with the support shaft 26 and contacts the movable roller 18 on the opposite side of the reference roller 13. And a spring (not shown) that biases the detection arm 25 toward the movable roller 18. A bill detection sensor 29 for detecting the presence / absence of bills at this position is provided on the conveyance path 11 between the reference roller 13 and the movable roller 18.

As described above, when a bill moves along the conveying path 11 and is conveyed between the reference roller 13 and the movable roller 18, the connecting arm 16 is moved around the fixed shaft 15 by the thickness of the bill. The movable roller 18 is displaced with respect to the reference roller 13 while rotating, and the auxiliary roller 27 is displaced with respect to the reference roller 13 while rotating the detection arm 25 about the rotation shaft 23 by the displacement of the movable roller 18. . The rotation shaft 23 is rotated by the displacement of the auxiliary roller 27, and the rotation amount is detected by the angle sensor 24, so that the reference roller 13 and the movable roller 18 are moved from the displacement amount of the movable roller 18 which corresponds to the rotation amount on a one-to-one basis. The thickness of the bill passing between the rollers 18 is detected. Here, the reference roller 13,
At least the outer peripheral surfaces of the movable roller 18 and the auxiliary roller 27 are made of a hard resin material or a metal material.

In this embodiment, a fixed shaft 31 for fixing the position is arranged parallel to the reference roller 13 on one side of the reference roller 13, and the fixed shaft 3 is provided.
First, a cylindrical first supply for supplying silicone oil to the outer peripheral surface of the reference roller 13 by keeping the outer peripheral surface of the reference roller 13 in contact with the outer peripheral surface of the reference roller 13 at all times. Roller (silicone oil supply means, reference roller side silicone oil supply roller) 32
Is rotatably supported coaxially with the fixed shaft 31. The arrangement position of the first supply roller 32 is not limited to the above position as long as it does not hinder the conveyance of bills. However, in order to make the entire apparatus compact, it is effective to arrange it in the above position.

One of the movable rollers 18 (reference roller 1
The position-fixed fixed shaft 15 arranged laterally (on the same side as the arrangement of the first supply roller 32 with respect to 3) in parallel with the movable roller 18 has its outer peripheral surface on the outer peripheral surface of the movable roller 18. A cylindrical second supply roller (silicone oil supply means, movable-roller-side silicone oil supply roller) 34 that rotates with the movable roller 18 by constant contact to supply silicone oil to the outer peripheral surface of the movable roller 18. Is rotatably supported coaxially with the fixed shaft 15. The arrangement position of the second supply roller 34 is not limited to the above position as long as it does not hinder the conveyance of bills or the movement of the movable roller 18.
However, since it is preferable that the second supply roller 34 is always in contact with the moving movable roller 18, it is effective to dispose the second supply roller 34 coaxially with the fixed shaft 15 which is the turning center of the movable roller 18.

Here, the first supply roller 32 and the second supply roller 34 have the same structure, and as shown in FIG. 2, a cylindrical silicone oil containing material 36 containing silicone oil and the silicone oil containing material 36. Silicone oil containing material 36
And a cylindrical semipermeable membrane material 37 which is provided on the entire outer peripheral surface in the radial direction and which disperses the silicone oil contained in the silicone oil-containing material 36 and exudes in small amounts, and the inner periphery of the silicone oil-containing material 36. And a cover member 38 (not shown) which partially covers the surface and both end surfaces in the axial direction to prevent the silicone oil from leaking from other than the semipermeable membrane material 37.

Then, the first supply roller 32 contacts the reference roller 13 at the semipermeable membrane material 37 constituting the outer peripheral surface thereof, and rotates together with the reference roller 13, so that the outer peripheral surface of the reference roller 13 is covered. Apply silicone oil evenly while supplying it. Here, the first supply roller 32
In order that the silicone oil can be supplied to the entire range of the reference roller 13 in the axial direction, the semipermeable membrane material 37 has an axial length longer than the axial length of the reference roller 13. Are arranged so as to be in contact with each other over the entire length in the axial direction.

Similarly, the second supply roller 34 contacts the movable roller 18 at the semipermeable membrane material 37 forming the outer peripheral surface thereof and rotates together with the movable roller 18, whereby the outer peripheral surface of the movable roller 18 is rotated. Apply evenly while supplying silicone oil. In addition, the second supply roller 34,
In order that the silicone oil can be supplied to the entire range of the movable roller 18 in the axial direction, the semipermeable membrane material 37 has an axial length longer than the axial length of the movable roller 18 and the axial line of the movable roller 18. It is arranged so as to be contactable over the entire length in the direction.

Here, as the silicone oil, it is effective to use dimethyl silicone oil, which is excellent in releasability and lubricity due to its characteristics, and particularly excellent in releasability. As the silicone oil-containing material 36 containing silicone oil, it is effective to use silicone rubber, which is a porous tissue material, and to retain the silicone oil in its pores. Further, as the semipermeable membrane material 37, it is effective to use porous PTFE (polytetrafluoroethylene or the like) which is excellent in terms of abrasion resistance and the like.

Further, in this embodiment, the reference roller 13 is in contact with the outer peripheral surface of the reference roller 13 on the opposite side to the first supply roller 32 over the entire length in the axial direction of the reference roller 13. Reference roller 1
A plate-shaped first scraping member (reference roller-side scraping member) 40 for scraping off foreign matter on the outer peripheral surface of 3 is provided, and similarly, on the opposite side of the movable roller 18 from the second supply roller 34. ,
A plate-shaped second scraping member (movable roller-side scraping member) 41 which comes into contact with the outer peripheral surface of the movable roller 18 over the entire length in the axial direction of the movable roller 18 and scrapes off foreign matter on the outer peripheral surface of the movable roller 18. Is provided.

The first scraping member 40 is the reference roller 1
3 is tilted so as to form an approximately acute angle with the outer peripheral surface on the side approaching the first scraping member 40 during rotation, and the second scraping member 41 also rotates when the movable roller 18 rotates. The outer peripheral surface on the side approaching the scraping member 41 is arranged so as to form an acute angle.

Here, the first scraping member 40 is made of a resin material or the like having a hardness lower than that of the outer peripheral surface of the reference roller 13 without damaging the outer peripheral surface of the reference roller 13. Similarly, the second scraping member 41 is made of a resin material or the like having a hardness lower than that of the outer peripheral surface of the movable roller 18 without damaging the outer peripheral surface of the movable roller 18.

According to this embodiment described above, the dust and dirt attached to the bill passing between the reference roller 13 and the movable roller 18 for detecting the thickness, the ink of the bill itself, etc. The foreign matter tries to adhere to the reference roller 13 or the movable roller 18, but the silicone oil is supplied to the outer peripheral surface of the reference roller 13 from the first supply roller 32.
Since the silicone oil is supplied from the second supply roller 34 to the outer peripheral surface of the reference roller 13, the outer peripheral surface of the reference roller 13 and the outer peripheral surface of the movable roller 18 are protected from dust, dust, ink, and the like. Prevent foreign substances from adhering. Therefore, the influence of foreign matter such as dust and dirt, or ink can be eliminated, and the movable roller 18 can be accurately displaced according to the thickness of the bill,
The thickness of the bill can be accurately detected.

In addition, the first supply roller 32 comes into contact with the outer peripheral surface of the reference roller 13 and rotates along with it, thereby supplying the silicone oil, and the second supply roller 34.
However, since the silicone oil is supplied while coming into contact with the outer peripheral surface of the movable roller 18 and rotating along with it, it is possible to stably supply the silicone oil to the outer peripheral surface of the reference roller 13 and the outer peripheral surface of the movable roller 18. it can. Therefore,
It is possible to prevent the silicone oil from adhering to the outer peripheral surface of the reference roller 13 and the outer peripheral surface of the movable roller 18 such as dust, dust, or foreign matter such as ink. Therefore, the influence of dust, dirt, or foreign matter such as ink can be reliably eliminated, so that the thickness of the sheet can be detected more accurately.

In addition, since the first supply roller 32 supplies the silicone oil to the reference roller 13 and the second supply roller 34 to the movable roller 18, the silicone oil is supplied while rotating together.
The rotational load applied to the reference roller 13 and the movable roller 18 can be minimized.

In addition, as shown in FIG. 3, the second scraping member 4
1 contacts the movable roller 18 to scrape off the foreign matter 42 on the outer peripheral surface of the movable roller 18, and the first scraping member 40
Will contact the reference roller 13 and scrape off the foreign matter on the outer peripheral surface of the reference roller 13, so that foreign matter such as dust or dust may remain on the outer peripheral surface of the reference roller 13 and the outer peripheral surface of the movable roller 18. Absent. Therefore, the influence of dust, dirt, or foreign matter such as ink can be more surely eliminated, so that the thickness of the sheet can be detected more accurately.

Here, when the foreign matter is removed only by the first scraping member 40 and the second scraping member 41, in order to scrape off the foreign matter having a large adhesive force, the first scraping member is used. 40 and the second scraping member 41 must be brought into contact with the corresponding ones of the reference roller 13 and the movable roller 18 with a large contact pressure, and the first scraping member 40 and the second scraping member 41 must be made of a hard material. Therefore, the reference roller 13 and the movable roller 18 may be damaged, and the damage may affect the detection of the thickness of the bill. However, in the above-described embodiment, since the silicone oil is supplied to the reference roller 13 and the movable roller 18, even if foreign matter adheres, the adhesive force becomes small, and thus the first scraping member 40 and the second scraping member 40. Since the contact pressure of the scraping member 41 to the corresponding ones of the reference roller 13 and the movable roller 18 can be reduced, and the first scraping member 40 and the second scraping member 41 can be made of a relatively soft material, the reference roller It is also possible to prevent the scratches on the movable roller 18 and the movable roller 18 and the scratches from affecting the detection of the thickness of the bill.

Silicone oil is used as the reference roller 13
The silicone oil supply means for supplying the movable roller 18 is not limited to the above, and for example, the one having the configuration shown in FIG. 4 can be adopted (FIG. 4).
Is provided for the movable roller 18). That is, the storage container 44 for storing the silicone oil and the storage container 4
(4) pump means (not shown) for pumping silicone oil out of 4, and a thick porous tissue material or the like which is provided on the silicone oil discharge side of this pump means to disperse the discharged silicone oil little by little Exuding member 4
A non-rotating silicone oil supply means 46 is constituted by 5 and 5.

Then, the exuding member 45 comes into contact with the corresponding ones of the reference roller 13 and the movable roller 18, so that silicone oil is evenly applied and applied to the outer peripheral surface of the roller. Here, the length of the exuding member 45 corresponds to that of the reference roller 13 and the movable roller 18 so that the silicone oil can be supplied to the entire range in the axial direction of the corresponding one of the reference roller 13 and the movable roller 18. The length of the object is greater than or equal to the axial direction, and the corresponding object is disposed so as to be contactable over the entire length in the axial direction.

Also in this case, the silicone oil supply means 46 provided for the reference roller 13 is
The bills are arranged at positions that do not hinder the conveyance of bills, and those provided to the movable roller 18 are arranged at positions that do not hinder the conveyance of bills or the movement of the movable rollers 18.

[0030]

As described above in detail, according to the sheet thickness detecting device of the first aspect of the present invention, the silicone oil is supplied to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller by the silicone oil supply means. Because it will be
This silicone oil prevents foreign matters such as dust, dust, and ink from adhering to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Therefore, it is possible to eliminate the influence of foreign matter such as dust and dirt, or ink,
The thickness of the sheet can be accurately detected.

According to the sheet thickness detecting device of the second aspect of the present invention, the reference roller side silicone oil supplying roller supplies the silicone oil while rotating in contact with the outer peripheral surface of the reference roller. Since the movable roller side silicone oil supply roller supplies the silicone oil while contacting with the outer peripheral surface of the movable roller and rotating along with the outer peripheral surface, the silicone oil is stably supplied to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Can be supplied. Therefore, this silicone oil further prevents foreign matter such as dust, dust, or ink from adhering to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Therefore, the influence of dust, dirt, or foreign matter such as ink can be reliably eliminated, so that the thickness of the sheet can be detected more accurately. In addition, the silicone oil supply roller on the reference roller side supplies the silicone oil to the reference roller, and the silicone oil supply roller on the movable roller side supplies the movable roller with the rotating silicone oil. Therefore, the load applied to the rotation of the reference roller and the movable roller is increased. Can be kept to a minimum.

According to the sheet thickness detecting apparatus of the third aspect of the present invention, the reference roller side scraping member comes into contact with the reference roller to scrape the foreign matter on the outer peripheral surface of the reference roller.
Since the movable roller side scraping member comes into contact with the movable roller to scrape off the foreign matter on the outer peripheral surface of the movable roller, foreign matter such as dust and dust remains on the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller. Never. Therefore, the influence of foreign matter such as dust and dirt or ink can be reliably eliminated,
The thickness of the sheet can be detected more accurately.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a seat pressure detecting device of the present invention.

FIG. 2 is a side view showing a first supply roller and a second supply roller of an embodiment of the sheet pressure detecting device of the present invention.

FIG. 3 is a side view showing a second scraping member and the like of one embodiment of the seat pressure detecting device of the present invention.

FIG. 4 is a side view showing another example of the silicone oil supply means of the embodiment of the sheet pressure detecting device of the present invention.

[Explanation of symbols]

13 Reference Roller 18 Movable Roller 32 First Supply Roller (Silicone Oil Supply Means, Reference Roller Side Silicone Oil Supply Roller) 34 Second Supply Roller (Silicone Oil Supply Means, Movable Roller Side Silicone Oil Supply Roller) 40 First Scraping Member (Reference roller side scraping member) 41 Second scraping member (movable roller side scraping member) 46 Silicone oil supply means

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65H 7/12 G01B 5/06 101

Claims (3)

(57) [Claims] 1. A reference roller that is fixed in position, and a displaceable movable roller that is provided so as to face the reference roller with a sheet conveyance path sandwiched therebetween, and the reference roller is determined from the displacement amount of the movable roller. And a sheet thickness detecting device for detecting the thickness of a sheet passing between movable rollers, wherein a silicone oil supply means for supplying silicone oil to the outer peripheral surface of the reference roller and the outer peripheral surface of the movable roller is provided. Sheet thickness detection device. 2. The silicone oil supply means contacts the reference roller side silicone oil supply roller that supplies silicone oil to the outer peripheral surface of the reference roller while rotating in contact with the reference roller, and the movable roller. 2. The sheet thickness detecting device according to claim 1, further comprising: a movable-roller-side silicone oil supply roller that supplies silicone oil to the outer peripheral surface of the movable roller while rotating together. 3. A reference-roller-side scraping member that contacts the reference roller to scrape foreign matter on the outer peripheral surface of the reference roller, and a movable roller that contacts the reference roller to scrape foreign matter on the outer peripheral surface of the movable roller. The sheet thickness detecting device according to claim 1 or 2, further comprising a movable roller-side scraping member.