JP2816689B2 - Sheet transport device - Google Patents

Description

The present invention relates to an automatic cash handling apparatus, a sheet conveying apparatus such as a copying machine, and a product using the sheet conveying apparatus.

[Conventional technology]

A conventional apparatus is described in, for example, Japanese Patent Application Laid-Open No. 61-263547. As shown in FIG. 10, the apparatus has a function of a conveyance belt 1 and a sheet conveyance guide.
And a rotatable roller 2 continuously disposed facing the transport belt, and the roller facing the transport belt is
It was arranged to simply contact the conveyor belt. On the other hand, there is a method of conveying a sheet by sandwiching the sheet between belts in opposite contact with each other, as described in Japanese Utility Model Publication No. Sho 61-1154 as shown in FIG.

[Problems to be solved by the invention]

In the sheet conveying apparatus described in, for example, JP-A-61-263547, the conveying belt and the roller are merely in contact with each other, and the conveying force applied to the sheet is small and unstable. there were. For this reason, when a sheet is conveyed, there is a problem that a slip occurs between the sheet and the conveyance belt, thereby causing a conveyance delay or a large skew variation.

Further, for example, in a sheet conveying apparatus as described in Japanese Utility Model Publication No. 61-1154, when one of the belts in opposing contact is twisting, a speed difference occurs at a connection portion with a pulley. For this reason, the conveyance delay and the skew have occurred in the sheet. Further, the method of transporting the sheet by sandwiching the sheet between the belts has a problem in that the winding angle is increased, the number of belts is increased, the load is increased, and the apparatus is simplified.

Further, in the conventional sheet conveying apparatus, the sheet is simply fed, and the sheet is stopped on the conveying path,
In order to convey a sheet with flexibility such as changing the position of the sheet, it is necessary to provide another unit that does not have a conveying force or another unit that applies force to change the position of the sheet to the sheet was there.

On the other hand, when assembling the sheet conveying device, for example, a large number of screws are required to attach the guide, or it is necessary to produce a guide for each product, and there is also a problem in terms of cost.

An object of the present invention is to eliminate a delay in transport and a variation in skew when transporting a sheet, and also possible to transport a sheet with flexibility such that the sheet can be stopped or controlled on a position on a sheet transport path, and An object is to realize a low-cost sheet conveying device.

[Means for solving the problem]

In order to achieve the above object, the present invention employs the following means.

1. A transport belt for transporting a sheet, and a plurality of rotatable rollers for holding the sheet in contact with the transport belt and having a predetermined gap between the transport belt and a sheet guide surface. In the sheet conveying apparatus having the arranged conveying guide, the plurality of rollers are disposed between the conveying belt and the conveying belt at a winding angle that applies a conveying force corresponding to a resistance force acting on the sheet. A sheet conveying device characterized by the following.

2. a conveying belt for conveying the sheet, a plurality of rotatable rollers for holding the sheet in contact with the conveying belt, a shaft for rotatably holding the roller and being held by a retainer, In a sheet transport device comprising a transport guide that is held on a shaft and arranges a sheet guide surface with a predetermined gap between the transport belt and the transport belt, the plurality of rollers are disposed between the transport belt and the transport belt. A sheet conveying device, wherein the sheet conveying device is provided with a winding angle that gives a conveying force commensurate with a resistance force acting on a sheet.

3. a conveying belt for conveying the sheet, a plurality of rotatable rollers for holding the sheet in contact with the conveying belt, and a roller for rotatably holding the roller and being held by a retainer; And a conveyance guide having a sheet guide surface arranged with a predetermined gap between the rollers, wherein the plurality of rollers are adapted to the resistance force acting on the sheet between the conveyance belt and the conveyance belt. A sheet conveying device, wherein the sheet conveying device is provided with a winding angle for applying a conveying force.

4. It has a conveyance belt for conveying the sheet, and a plurality of rotatable rollers for holding the sheet in contact with the conveyance belt, and having a predetermined clearance between the conveyance belt and the sheet guide surface. In the sheet conveying apparatus having the arranged conveying guides, the conveying force of the sheet is F, the coefficient related to the friction coefficient between the roller and the belt is μ, the tension of the belt is T, and the winding angle between the roller and the belt is When θ is set, the plurality of rollers are disposed at a winding angle θ corresponding to the sheet conveyance force F between the rollers and the conveyance belt based on a relationship of F = μTθ. Sheet conveying device.

[Action]

According to the above configuration, the rollers are arranged between the transport belt and the individual rollers so as to have a winding angle corresponding to the resistance force acting on the sheet. And a skew of the sheet can be eliminated.

That is, between the sheet conveying force F and the winding angle θ,
There is a relationship as shown in FIG. At this time, the relationship between the conveying force F and the winding angle θ can be approximated by F = μTθ. Here, μ is a coefficient related to the friction coefficient of the roller and the belt, and T is the tension. By using this relationship, a winding angle θ suitable for the necessary conveying force F is found, and the rollers are arranged so that the winding angle between the belt and the rollers becomes θ.
An optimal conveying force can be applied to the sheet. In addition, since the rollers are rotatable, the load is small, and the conveyance delay due to sliding is small.

Further, since the conveyance guide is arranged with a predetermined gap with respect to the conveyance belt, even a folded or wrinkled sheet can be smoothly conveyed without resistance, and no slip or jam occurs.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an example of a bill transport path in an automatic cash handling apparatus using the sheet transport apparatus of the present invention. FIG. 2 shows a sheet conveying apparatus which is the basis of this conveying path.

The sheet conveying apparatus includes a conveying belt 1 serving as a driving source for sheet conveyance, a driven roller 2 continuously disposed in contact with the conveying belt 1, and a roller so that these rollers 2 can rotate freely. A shaft 3 for holding the shaft 2, a retainer for holding the shaft 3, and a guide 5 attached to the shaft 3 so that the bills to be conveyed do not fly out or collide with the shaft 3 or the roller 2.

The drive-side conveyor belt 1 is connected to a pulley 6 engaged with the conveyor belt, a shaft 7 holding the pulley 6, and the like, and a power transmission mechanism such as a timing belt (not shown).
It is driven by a motor (not shown).

Between the conveyor belt 1 and each driven roller 2, a third
As shown in the figure, a winding angle θ is provided. The relationship between the bill conveying force F and the winding angle θ is as shown in FIG. By using this relationship to form a banknote transport path with the optimal wrap angle for banknote transport, stable banknote transport with no delay in banknote transport and variations in skew can be achieved, and high reliability in holiday operation etc. It can fully cope with the automatic cash transaction apparatus which requires the property. If it is necessary to form a long conveying path, a pulley 8 engaged with a conveying belt on the way may be provided as shown in FIG.

Further, when assembling the paper money transport path as shown in FIG. 1, the length is determined as shown in FIG. 5, and the mounting portion of the guide 5 has a shape and flexibility necessary for mounting the guide. The use of the modularized guide 5 having the above structure allows easy installation and easy assembly. Therefore, labor costs can be reduced, and production costs can be reduced by not using screws or using common parts.

In the above-described bill conveying path, the driven roller 2 is fixed to the shaft 3, but the roller 2 is a stepped roller and may be held by the guide 9 as shown in FIG. . In this case, the guide 9 has a roller holding portion for holding the roller 2 so that the roller 2 can rotate freely, and a shape such that the roller 2 has a winding angle with the transport belt 1. 4 and held. As clearly shown in FIG.
The fixing portion between the roller and the retainer 4 is fixed and held with a curvature in the sheet conveying direction so that the roller 2 has a winding angle with respect to the conveying belt 1.

According to the automatic cash transaction apparatus using the above-described bill transport apparatus, a stable transport of bills can be realized, and a highly reliable and low-cost automatic cash transaction apparatus with low production cost can be realized.

FIG. 7 shows an example of the sheet conveying direction switching device. This device feeds a sheet coming in from the direction of arrow A in the direction of arrow B.

The sheet conveying direction switching device includes a driving roller 10 that conveys a sheet, a rotatable driven roller 11 that is in opposing contact with the contact pressure of the driving roller 10 and conveys the sheet by a conveying force generated here, and the roller 11. When the roller 11 is held so as to rotate, and the sheet enters from the direction of arrow A, the roller 11 is moved upward so as to form a gap with the driving roller 10. Roller holder made of deformable bimorph type piezoelectric element
7, a drive unit (not shown) for driving the roller holding unit 12, a stopper (not shown) for temporarily stopping the sheet as shown in FIG. 7, and a guide 13 for guiding the conveyance of the sheet.

The conveyed sheet 14 first enters from the direction of arrow A. At this time, the driven roller 11 forms a gap between the driven roller 11 and the conveying roller 10 and rises as indicated by a broken line in FIG. 8 so as not to have a large conveying force in the direction of arrow B. This can be achieved by forming the roller holding portion 12 made of a bimorph type piezoelectric element holding the driven roller 11 as shown by a broken line.

The sheet 14 is then stopped by a stopper (not shown). At this time, if there is a stopper in the direction B, the seat 14 can be stopped more accurately. After the sheet stops within a predetermined range, the driven roller 11 and the driving roller 10 contact the roller holding member 12 as shown in FIG. 8, and generate a large conveying force in the B direction. The sheet 14 is conveyed in the B direction by this conveying force.

In the sheet conveying direction switching device as described above, a bimorph type piezoelectric element is used as a holding member for the driven roller 11, but the holding member is deformed by receiving an external force or displacement, for example, A plastic material may be used, or a roller holding member that raises the roller by receiving a force or displacement from another actuator, such as a lever, may be used.

According to the sheet conveying direction switching device as described above, a small and highly reliable sheet conveying direction switching device can be realized.

As an application of the above-described deformable roller holding member, a device for separating a sheet and an intermittent feeding device as shown in FIG. 9 can be considered.

This device separates and feeds the sheet by intermittently bringing the separation roller 15 into contact with the sheet.

Further, by deforming the guide itself for guiding the sheet, it is possible to generate a conveying force or to generate a gap between the sheet and the belt. That is, FIG. 14 shows a sheet of a belt roller clamping type in which a driving portion 17 such as a piezoelectric element for generating displacement in the horizontal direction in the drawing is provided at both ends of a flexible guide 16 capable of bending deformation. It is a transport mechanism. At this time, the roller 2 is attached to the guide 16. Guide 16
And a drive unit 17, there is a guide holding unit 18 that holds the guide 16 and transmits displacement and force of the drive unit 17 to the guide 16.

When no voltage is applied to the piezoelectric element 17, the roller 2 and the guide 16 are arranged so that a gap is formed between the roller 2 and the belt 1. For this reason, in this case, the sheet cannot be conveyed because a conveyance force for conveying the sheet is not generated. However, when a voltage is applied to the piezoelectric element 17, the fifteenth
As shown in the figure, the guide 16 buckles and generates a winding angle between the belt 1 and the roller 2, so that a conveying force for conveying the sheet is generated and the sheet can be conveyed.

If this transport method is used, a transport direction switching device can be configured. In this case, since no sheet conveyance force is required, without applying a voltage to the piezoelectric element 17,
If a transport direction switching mechanism as shown in FIG. 7 is provided, the transport direction of the sheet can be switched.

[Effects of the Invention] According to the present invention, it is possible to apply a conveyance force optimal for sheet conveyance to a sheet, so that it is possible to realize a highly reliable sheet conveyance device free from sheet conveyance delay and skew variation. Further, for example, as a driven roller holding member, a material that can be deformed by itself, such as a bimorph type piezoelectric element,
By adjusting the conveyance force, temporarily stopping the sheet, controlling the posture, etc., by adopting a structure that can move like a lever or a material that has the flexibility to generate a displacement upon receiving a force or displacement from the outside, A flexible sheet conveying device can be realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a banknote transport path of a cash transaction apparatus as an embodiment using the sheet transport apparatus of the present invention, FIG. 2 is a perspective view of one embodiment of the sheet transport apparatus of the present invention, and FIG. FIG. 4 is a cross-sectional view, FIG. 4 is a view showing one embodiment when the transport path is long, FIG. 5 is a view showing an example of a guide mounting method,
FIG. 6 is a perspective view showing another embodiment of the sheet conveying device of the present invention. FIG. 7 is a perspective view showing one embodiment of a sheet conveying direction switching device using the sheet conveying device of the present invention. 8 is a view showing the operation, FIG. 9 is a view showing an embodiment of a sheet separating and intermittent feeding apparatus, FIGS. 10 and 11 are views for explaining a conventional apparatus, and FIG. FIG. 13 is a diagram showing a relationship between a force F, a winding angle of a belt and a roller, and belt tension, FIG. 13 is a perspective view showing an example of a modularized guide, and FIG.
FIG. 15 and FIG. 15 are sectional views of an embodiment using a deformable guide. 1 ... Conveyer belt (drive side), 2 ... Driving roller, 3 ...
... Roller holding member (shaft), 4 ... Retainer, 5 ...
... Conveying guide, 6 ... Belt pulley, 7 ... Shaft, 8 ... Intermediate pulley, 9 ... Conveying guide, 10 ... Conveying roller (drive side), 11 ... Driving roller, 12 ... Driving roller holding Member, 13… Conveyance guide, 14… Sheet, 15 ……
Separation roller, 16 guide, 17 drive unit (piezoelectric element), 18 guide holding unit.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-204547 (JP, A) JP-A-63-230470 (JP, A) JP-A-52-38292 (JP, A) JP-A-58-58 197138 (JP, A) JP-A-51-36303 (JP, A) JP-A-63-32853 (JP, U) JP-A-51-117058 (JP, U) JP-A-63-130448 (JP, U) Japanese Utility Model Showa 62-183651 (JP, U) Japanese Utility Model Showa 55-172942 (JP, U) Japanese Utility Model Showa 60-122735 (JP, U) Japanese Utility Model Showa 49-84880 (JP, U) Japanese Patent Publication 48-15514 (JP, B1) Jiko 58-17863 (JP, Y2) Jiko 51-21494 (JP, Y2)

Claims (4)

(57) [Claims] A transport belt for transporting the sheet; and a plurality of rotatable rollers for holding the sheet in contact with the transport belt, the roller having a predetermined gap between the transport belt. In a sheet conveying apparatus having a conveying guide having a guide surface, the plurality of rollers are disposed between the conveying belt and the conveying belt at a winding angle that applies a conveying force corresponding to a resistance force acting on the sheet. A sheet conveying device. 2. A conveying belt for conveying a sheet, a plurality of rotatable rollers for holding the sheet in contact with the conveying belt, and a shaft held by a retainer for rotatably holding the rollers. And a conveyance guide that is held by the shaft and has a sheet guide surface with a predetermined gap between the conveyance belt and the conveyance belt, wherein the plurality of rollers are disposed between the conveyance belt and the conveyance guide. To
A sheet conveying device, wherein the sheet conveying device is provided with a winding angle that gives a conveying force commensurate with the resistance force acting on the sheet. A conveying belt for conveying the sheet, a plurality of rotatable rollers for holding the sheet in contact with the conveying belt, and a roller for rotatably holding the roller and being held by a retainer; In a sheet conveying apparatus having a conveying guide in which a sheet guide surface is arranged with a predetermined gap between the conveying belt and the conveying belt, the plurality of rollers are configured to have a resistance force acting on the sheet between the conveying belt and the conveying belt. A sheet conveying device provided with a winding angle that provides a conveying force appropriate for the sheet conveying device. 4. A conveying belt for conveying a sheet, and a plurality of rotatable rollers for holding the sheet in contact with the conveying belt and having a predetermined gap between the conveying belt and the sheet. In a sheet conveying apparatus having a conveying guide on which a guide surface is arranged, the conveying force of the sheet is F,
When a coefficient related to a friction coefficient between the roller and the belt is μ, a tension of the belt is T, and a winding angle between the roller and the belt is θ, the plurality of rollers are expressed as F =
Based on the relationship μTθ,
A sheet conveying device, wherein the sheet conveying device is provided with a winding angle θ corresponding to the sheet conveying force F.