JPS63230473A - Device for arranging paper sheet and the like in order - Google Patents

Abstract

PURPOSE:To arrange in order paper sheets with a compact high speed mechanism by disposing a piezo-electric body on the base of a spring member for transmitting vibrations to an arranging member for vibrating the end face of paper sheets to apply voltage to said body from a voltage control section for resonance. CONSTITUTION:Paper sheets 6 sandwiched and transferred by transfer belts 8 are urged on the rear end by a brush wheel 7, guided by both arranging members 3 and abut against a fixed guide 5 to be stacked. And when DC voltage having a predetermined cycle and amplitude is applied to bimorph type piezo-electric bodies 1 attached to both sides of a shim 2 through an oscillator circuit and a voltage control section, arranging members 3 are resonated through the shim 2 of a spring member to vibrate and arrange in order the side faces of paper sheets 6. Then, depending upon the receiving and stacking condition of paper sheets 6 or the high or low degree of arranging the paper sheets due to paper quality of paper sheets 6 is changed voltage applied to the piezo-electric body 1. Also, to prevent the low degree of arrangement of paper sheets from buckling, voltage is changed at first from small level to large level, so that the paper sheets can be arranged in order rapidly with a compact mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper sheet sorting device, and particularly to a paper sheet stacking device suitable for compact and high-speed paper sheet sorting.

[Conventional technology]

Conventional devices include Japanese Patent Application Laid-open No. 127564/1983 and
As described in No. 78748, a method has been used in which the end faces of the paper sheets are struck or pressed by a mechanism using a link or a cam to align them during or after the paper sheets are stacked.

[Problem that the invention seeks to solve]

The above conventional technology uses a mechanical system such as a link mechanism to
Since the paper sheet is forcibly displaced, if the paper sheet has low rigidity, the paper sheet may undergo out-of-plane deformation such as buckling, and the edges of the paper sheet may be aligned. There was something I couldn't do. In addition, since it is a link mechanism type, increasing the speed requires a large inertia force, which requires a driving force that is an order of magnitude greater than the force required to align the paper sheets itself, making it difficult to miniaturize and increase the speed. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper sheet sorting device capable of aligning paper sheets at high speed using a small mechanism.

[Means for solving problems]

In order to achieve the above object, the present invention provides a paper sheet aligning device in which a bimorph piezoelectric body is used as a drive source with variable vibration amplitude, and the vibrating body consisting of a spring of a shim material and a mass of an aligning member is in a resonant state. By using this method to vibrate the end faces of paper sheets, the paper sheets can be arranged compactly and at high speed.

[Effect]

The piezoelectric body-driven vibrating body alignment mechanism of the present invention can change the amplitude while the vibrating body is in a resonant state by applying a voltage applied to the piezoelectric body at a constant frequency and changing the voltage level. By this operation, at the beginning of the alignment operation when the alignment condition is poor, the voltage applied to the piezoelectric body is controlled to be small, commensurate with the low rigidity of the protruding banknotes and the resistance force required for alignment.
By reducing the amplitude of the vibrating body, alignment can be performed with a small alignment force, and as the alignment condition of the paper sheets improves, the applied voltage can be increased to align the paper sheets with a larger alignment force. Leaves can be aligned without causing large out-of-plane deformations such as buckling.

Furthermore, by increasing the resonance frequency by changing the mass and rigidity of the vibrating body, the alignment speed can be changed almost freely, making high-speed alignment possible.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in Section 1. This will be explained with reference to FIG. In the embodiment shown in FIG. 1, paper sheets 6 are conveyed one by one by a conveyor belt 8, and are beaten by a brush wheel 7.
In order to align the left and right ends of paper sheets 6 in the longitudinal direction in a storage device in which sheets are stored and stacked in a horizontal state, a piezoelectric-driven type comprising a piezoelectric material 1 with an electrode 4, a shim 2, and an alignment member 3 is used. It is equipped with a vibration alignment mechanism. The piezoelectric body attached to the fixed guide 5, which also serves as a storage guide for the paper sheets 6, is a bimorph type piezoelectric body with a structure in which the shim 2 is sandwiched and glued on both sides, as shown in FIG. An alignment member 3 is provided at the tip of a cantilever structure based on. One end of the alignment member 3 is bent outward so that the paper sheets 6 can be guided during storage. The alignment mechanism with such a configuration is determined by the mass m of the alignment member 3, the spring rigidity of the cantilever beam of the shim 2, which corresponds to the shim width and the plate thickness, and α is the cantilever length). can be set in the range of several hundred Hz. By applying an applied voltage having the same frequency as this natural frequency f to the electrode 4 of the piezoelectric body 1 by a power amplifier circuit and an oscillation circuit as shown in FIG. 2, the bimorph piezoelectric body undergoes bending deformation. This deformation force becomes an excitation force, and the vibration system of the alignment member 3 and the shim 2 becomes resonant in the first mode of cantilever bending. Therefore, by applying the above-mentioned applied voltage to the paper sheets 6 during storage and stacking or after stacking, the paper sheets 6 collide with and vibrate against the resonant alignment member 3, thereby making it possible to align them. Poorly aligned sheets have a larger protrusion in the left and right directions than other stacked sheets, and have lower bending rigidity due to the same mechanics as a cantilever beam. This may cause bending, etc., making alignment impossible. In this embodiment, even for poorly aligned paper sheets, by initially changing the applied voltage from a small level to a large level, the resonance amplitude of the alignment member 3 can be changed within the alignment time. The alignment collision force can be controlled according to the alignment state of the paper sheets.

In the conventional link cam system, the alignment speed of about several tens of H7 was the limit due to motor capacity etc., and compared to the system which used a forced displacement generation mechanism regardless of banknote rigidity, this example For example, not only can paper sheets be aligned at high speed without buckling, but the direct drive method using piezoelectric material eliminates the drive sources and transmission mechanisms such as conventional motors and link cams. Can be made smaller.

Cost reduction can be achieved.

FIG. 3 shows a second embodiment. In the embodiment shown in FIG. 3, an alignment mechanism is provided in an apparatus in which paper sheets 6 are stored and stacked in a vertical direction.

The configuration is basically the same as the first embodiment. What changes in vertical storage is the installation of a movable guide 10 to change the storage width according to the number of sheets 6, and the arrangement member 3 that also serves as a guide for paper sheets entering from the vertical direction. , it is bent as shown in the figure. The effects of this embodiment are also the same as those of the first embodiment.

As is common to the first and second embodiments, the end of the aligning machine is attached so that collision alignment can be performed by displacement parallel to the stacking direction of one paper sheet 6.

〔Effect of the invention〕

According to the present invention, (1) the alignment force can be adjusted by voltage control using a piezoelectric drive system, and high-performance alignment is possible without buckling paper sheets; (2) alignment members and shims; By changing the rigidity, it is possible to configure a resonant alignment mechanism up to several hundred Hz, and the alignment speed can be increased compared to the several tens of Hz level of the conventional link cam type. No motor or transmission mechanism is required.

It has the advantage of being smaller and lower in cost.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of a horizontal storage and alignment mechanism according to an embodiment of the present invention, FIG. 2 is a detailed configuration diagram of the alignment mechanism section of FIG. 1, and FIG. FIG. 2 is an overall schematic diagram of a certain vertical storage and alignment mechanism. DESCRIPTION OF SYMBOLS 1... Piezoelectric body, 2... Shim, 3... Alignment member, 4
...Electrode, 5...Fixed guide, 6...Paper sheet, 7
...Brush wheel, 8th 1st picture 3rd figure

Claims (1)

[Claims] 1. A paper sheet sorting device having an aligning means for aligning the end faces of the paper sheets to be stored and stacked, wherein the aligning means transmits vibrations to an aligning member that excites the end faces of the paper sheets and to the aligning member. A sheet sorting device comprising a spring member, a piezoelectric body that applies vibration to the spring member, and a voltage control section that applies voltage to the piezoelectric body.