Patent Application
20090295064
This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2006-299543, filed on Nov. 2, 2006, and International Application No. PCT/JP2007/001180, filed on Oct. 29, 2007; the entire contents of all of which are incorporated herein by references.
The present invention relates to a sheet conveying apparatus for conveying sheets such as marketable securities using a conveying belt and more particularly to a sheet conveying apparatus capable of preventing meandering of the conveying belt.
A sheet conveying apparatus used in a sheet processing apparatus for processing sheets such as marketable securities is an apparatus for taking out and conveying the sheets one by one, performing authenticity discrimination or quality bill and disqualified bill discrimination of the sheets regarding a predetermined check area set on each sheet surface, and sorting them on the discrimination results. Therefore, the sheet processing apparatus, to stably ensure the check area and perform the sorting process such as the stacking process based on the check results, a meandering countermeasure for performing normal conveyance is important.
Conventionally, as such a meandering countermeasure, for example, in the case of conveyance using a flat belt, (1) installation of a crowning roller (a crown-shaped roller) (for example, refer to Patent Document 1) and (2) installation of a flange roller are known. Patent Document 1: Japanese Patent Application 2006-1670 (
However, in the sheet processing apparatus stated in Patent Document 1, when the material of the flat belt is hard, in the countermeasure of installation of the crowning roller, the belt does not get to fit the roller and the effect is low. Further, when the flange roller is installed for the conventional belt at the sheet conveying position, only a flange roller having a flange height in correspondence to the belt thickness can be installed and a problem arises that the belt runs over the flange.
The present invention was developed to solve the aforementioned problem and is intended to provide a sheet conveying apparatus capable of prevent meandering of the belt by using a flange roller with a flange height higher than the thickness of the belt in the folding-back portion of the conveying roller in the neighborhood of the discontinuous portions of belt conveyance such as the entrance portion of sheets and the exit portion of sheets.
To accomplish the above object, there is provided a sheet conveying apparatus structured so as to arrange a conveying roller along a conveying path to convey sheets and suspend a conveying belt over the conveying roller, comprising: a top conveying roller with a top conveying belt in contact with one surface of the sheets suspended over; a bottom conveying roller with a bottom conveying belt in contact with another surface of the sheets suspended over; a drive roller to drive the top and bottom conveying belts; a take-in portion for holding and taking in the sheets by permitting the top conveying belt and the bottom conveying belt to make contact with each other; a first flange roller arranged at a leading edge of the take-in portion for composing the top conveying roller; and a second flange roller arranged just closely to an upstream side of the top conveying belt suspended over the first flange roller in a rotational direction, wherein a flange height of the second flange roller is higher than a thickness of the top conveying belt.
Further, there is provided A sheet conveying apparatus structured so as to arrange a conveying roller along a conveying path to convey sheets and suspend a conveying belt over the conveying roller, comprising: a top conveying roller with a top conveying belt in contact with one surface of the sheets suspended over; a bottom conveying roller with a bottom conveying belt in contact with another surface of the sheets suspended over; a drive roller to drive the top and bottom conveying belts; a take-in portion to hold and take in the sheets by permitting the top conveying belt and the bottom conveying belt to make contact with each other; a feeding portion to feed the sheets taken-in by the take-in portion; a first flange roller arranged at a leading edge of the take-in portion to compose the top conveying roller; and a second flange roller arranged just closely to an upstream side of the top conveying belt suspended over the first flange roller in a rotational direction, wherein a flange height of the second flange roller is higher than a thickness of the bottom conveying belt.
Hereinafter, the embodiment of the present invention will be explained with reference to the accompanying drawings.
On the first conveying path 104a, the top conveying roller arranged so as to suspend the top conveying belt in contact with the top (one surface) of each sheet along the conveying path and the bottom conveying roller arranged so as to suspend the bottom conveying belt in contact with the bottom (the other surface) of the sheet are born by the main body.
Two flat belts are arranged on the innermost side and on the operation side in the axial direction of the conveying roller and on the portion where flat belts 101a and 101b as a top conveying belt and flat belts 102a and 102b as a bottom conveying belt in contact with the bottom make contact with each other, the concerned sheets P are held and conveyed.
The flat belts 101a and 101b and the flat belts 102a and 102b are respectively composed of one continuous belt, and the flat belts 101a and 101b are driven by a drive roller 106a, and the flat belts 102a and 102b are driven by a drive roller 106b.
For the second conveying path 104b, the top conveying roller used for the first conveying path 104a is extended and used as it is and the bottom conveying roller arranged so as to suspend the bottom conveying belt in contact with the bottom of each sheet is born by the main body.
Two flat belts are arranged on the innermost side and on the operation side in the axial direction of the conveying roller and on the portion where the flat belts 101a and 101b as a top conveying belt and flat belts 103a and 103b as a bottom conveying belt in contact with the bottom make contact with each other, the concerned sheets P are held and conveyed.
The flat belts 101a and 101b and the flat belts 103a and 103b are respectively composed of one continuous belt, and the flat belts 101a and 101b are driven by the drive roller 106a, and the flat belts 103a and 103b are driven by a drive roller 106c.
The sheets P conveyed by the first conveying path 104a are switched by a branching gate 105a and when instructed so as to be conveyed in the direction of an arrow B1 shown in the drawing, the sheets P are furthermore conveyed by the second conveying path 104b and are fed in the direction of an arrow B2.
The same may be said with the third conveying path 104c, fourth conveying path 104d, and fifth conveying path 104e, so that the explanation thereof will be omitted here.
Fha≧3Vt+Δh (1)
Fha: Height of flange
Vt: Thickness of flat belt
Δh: Allowable value of flange height
Fwa=Vd+Δw (2)
Fwa: Interval of flanges
Vd: Width of flat belt
Δw: Allowable value of flange interval
Namely, the flange height Fha of the flange roller (second flange roller) 107 is at least 3 times of the thickness Vt of the top conveying belt.
Further, in this embodiment, when Fha=3 Vt and Δw=0.5 mm are assumed, good results are obtained, though the present invention is not limited to it, and according to the form of the conveying path to be applied, an appropriate value is set.
Further, the material of the flat belts which is used in this embodiment has a structure that a polyamide film is used as a core and polyamide woven cloth and nitrile rubber are laminated.
The flange roller 107 aforementioned is used for the conveying roller immediately before the conveying roller 108 for supplying the conveying belts 101a and 101b to the conveying path 104a for conveying the sheets P. Namely, the flange roller (second flange roller) 107 is arranged just closely to the upstream side of the conveying belts 101a and 101b which are the top conveying belts suspended over the flange roller (first flange roller) 108 in the rotational direction.
By use of this arrangement, the meandering of the flat belt on the conveying surface for conveying sheets can be prevented. Further, on the conveying surface using the flange roller type, the flange height Fha is higher than the thickness of the flat belt, so that the sheets P are not conveyed.
Fhb=Vt·Δh (3)
Fhb: Height of flange
Vt: Thickness of flat belt
Δh: Allowable value of flange height
Fwb=Vd+ΔW (4)
Vd: Width of flat belt
Fwb: Interval of flanges
Δw: Allowable value of flange interval
Namely, the flange height Fhb of the flange roller (first flange roller) 108 is set so as to be equal to the thickness Vt of the bottom conveying belt. Namely, it is set so as not to exceed the thickness Vt of the bottom conveying belt.
The first conveying path 104a drawn is structured so that the flat belts 101a and 101b suspended over the flange roller 107 and flange rollers 108a and 108d make contact with the top of each of the sheets P. The flat belts 102a and 102b suspended over the flange rollers 108b, 108c, and 108d are arranged so as to make contact with the bottom surface of each of the sheets P.
On the first conveying path 104a structured like this, the sheets P are held by the conveying belt arranged on the top side and the conveying belt arranged on the bottom side and are conveyed in the direction of an arrow A1 shown in the drawing.
Here, the flange roller 108a is born at the entrance of the sheets P and on the upstream side of the conveying belts 101a and 101b supplied to the flange roller 108a in the conveying rotational direction, the flange roller 107 is arranged. By use of this arrangement, the position of the conveying belt immediately before contact with the sheets P is specified, thus the meandering of the conveying belts 101a and 101b on the conveying path 104a can be prevented.
Here, for all the conveying rollers, the flange roller 108 is used. Namely, the flange height of the flange rollers is formed so as to be almost equal to the thickness of the flat belts, so that the flange surface and conveying belt surface are almost in the uniform state and the flange surface is changed to the conveying surface, thus it makes contact with the sheets P and can prevent the meandering of the sheets P.
By use of this arrangement, the position of the conveying belt immediately after conveyance of the sheets P can be controlled, thus the conveying belts 101a and 101b on the conveying path 104b can be prevented from meandering.
As explained above, according to the embodiments of the present invention, in the folding-back portion of the discontinuous portion of belt conveyance such as the entrance portion of sheets and exit portion of sheets, the flange roller with a flange height higher than the belt thickness is used, thus the belt can be prevented from me andering.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2006-299543 | Nov 2006 | JP | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2007/001180 | Oct 2007 | US |
| Child | 12435129 | US |
