JPH02215633A - Card carrying device - Google Patents

Abstract

PURPOSE:To reduce number of parts and assembling manday, and enable to be light weighted and thin shaped, by providing two set of piezoelectric elements to generate flexural vibrations having same frequency but phase difference and mutually crossing at right angles, on a bar shaped vibrating body, and a roller part rotating a cylindrical rotor. CONSTITUTION:When high frequency voltages having 90 deg. phase difference are applied to two set of piezoelectric elements 10, 11, flexural vibrations in the two crossing directions at right angles are generated in a bar shaped vibrating body 4, they interfer mutually, a circular motion in the plane perpendicular to the axis line is generated at an arbitrary mass point on the surface of the bar shaped vibrating body 4, and a roller part 12 is pressed against the inner circumferential face of a cylindrical rotor 7. Consequently, the roller part 12 rotates the cylindrical rotor 7 in the same direction as the circular motion by the friction force. At turning reversely the phase of applied voltage, the direction of the circular motion of the roller part 12 is turned reversely, and the cylindrical rotor 7 is turned reversely. When a moving body such as a magnetic card 1 is brought between the cylindrical rotor 7 and a rotating roller 5, the moving body can be straightly moved in the rotating direction by the friction force with the cylindrical rotor 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a card conveying device suitable for application to a card reader such as a card-type vending machine, and particularly relates to a card conveying device which is suitable for applying to a card reader such as a card-type vending machine. The present invention relates to a card conveyance device obtained by.

[Conventional technology]

Conventionally, a card reader built into a card-type vending machine takes in a magnetic card inserted through a card insertion slot, processes it, and returns it through a card return slot after the service is completed, so it is used as a card transport device. Generally, it operates by receiving the rotation transmission from the drive motor and the drive motor.
It consisted of conveyance means such as rollers and conveyor belts that moved the magnetic card at a constant speed.

[Problem to be solved by the invention]

However, such conventional card transport devices require a bearing member single rotation transmission mechanism in addition to the drive motor and transport means described above, which increases the number of parts and assembly man-hours (7), increases the cost, and increases the number of assembly steps. , since conventional drive motors rotate the rotor using electromagnetic action,
There is a problem in that the motor limits the ability to make the device lighter and thinner. When a gear is used as a single rotation transmission mechanism, there is a problem in that highly accurate force feeding and positioning cannot be performed due to backlash.

Therefore, the present invention solves the conventional problems as described above, and provides a card transport device that uses ultrasonic vibrations as a drive energy source to significantly reduce the number of parts and the number of assembly steps, and to make it lighter and thinner. The purpose is to provide the following.

Ultrasonic vibration is a method in which a piezoelectric element is attached to an elastic body and a high frequency voltage is applied to it to cause flexural vibration in the elastic body, and the vibration energy is extracted as rotational or linear motion. It is smaller and lighter than conventional drive motors.

It has excellent performance and features such as thinness, low speed, high torque, high responsiveness, and high controllability.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention includes a rod-shaped vibrating body having both ends fixed and rotatably supported by a shaft, which are disposed vertically opposite to each other with a card conveying path in between, and a rotary roller whose both ends are rotatably supported, and an outer periphery of the rod-shaped vibrating body. a cylindrical rotating body rotatably fitted through a bearing and having an outer periphery in contact with the circumferential surface of the rotary roller via a moving body; two sets of pressure TIL elements that are driven by application of high-frequency voltages that differ by 90° to generate flexural vibrations on the rod-shaped vibrating body in two directions orthogonal thereto at the same frequency and out of phase with each other; The rod-shaped vibrating body is provided at a position that is an antinode of vibration on the outer periphery of the rod-shaped vibrating body, and is pressed against the inner circumferential surface of the cylindrical rotating body by the generation of orbital circular motion accompanying the flexural vibration of the rod-shaped vibrating body, and the cylindrical rotating body It is round and consists of a roller part that rotates it.

[Effect]

In the present invention, when high-frequency voltages with a phase shift of 90° are applied to two sets of piezoelectric elements, flexural vibrations (vertical and horizontal vibrations) are generated in the rod-shaped vibrating body in two directions orthogonal to this, and these vibrations interact with each other. When there is interference, any mass point on the surface of the rod-shaped vibrating body (excluding mass points at the joints) causes circular (or elliptical) motion in a plane perpendicular to the axis of the rod-shaped vibrating body, causing the roller part to move into a cylindrical rotating body. Press it against the inner circumferential surface of the Accordingly, due to the frictional force between the roller section and the cylindrical rotating body, the roller section rotates the cylindrical rotating body in the same direction as the rotation direction of the circular motion. When the phase of the applied voltage is switched to the opposite direction, the direction of circular (or elliptical) motion of the roller section becomes opposite, and the direction of rotation of the cylindrical rotating body is reversed. When a movable body such as a magnetic card is interposed between the cylindrical rotary body and the rotating roller, the movable body is linearly moved in the direction of rotation due to friction with the cylindrical rotary body.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Fig. 1 is a sectional view showing an embodiment of the card conveying device according to the present invention, Fig. 2 is a perspective view of a rod-shaped vibrating body, Fig. 3 is a sectional view taken along line L-1m in Fig. 1, and Fig. 1 is a piezoelectric element. and its circuit. In these figures, reference numeral 1 denotes a magnetic card as a moving body to be sent into the card conveyance path 2, 3 denotes a card conveyance device disposed in the card conveyance path 2, and the card conveyance device 3#-i, . It is provided with a rod-shaped vibrating body 4 and a rotating roller 5 which are arranged opposite to each other so as to be vertically substantially parallel to each other with a path 2 in between.

The rod-shaped vibrating body 4 is made of metal and has a rectangular (or circular) cross-section, and is capable of flexural vibration (horizontal vibration) in the X direction perpendicular to the axis and 9-flex vibration (vertical vibration) B in the direction of the arrow Y. It is manufactured by adjusting the second moment of area in the X and Y directions so that the natural frequencies are equal, and both ends are fixed to the device fixing part 6, respectively. A ridged cylindrical rotating body T is rotatably fitted on the outer periphery of the rod-shaped vibrating body 4 via a pair of left and right bearings 8, and a magnetic card is placed between the lower surface of this cylindrical rotating body T and the rotary row 25. A gap G is set that is approximately equal to or slightly smaller than the thickness of 1. - The pair of bearings 8 are fitted on the outer circumferential surfaces of both ends of the cylindrical rotating body 1, which are nodes of natural flexural vibration. Further, on the outer circumferential surface of the rod-shaped vibrating body 4, two sets of piezoelectric elements l are provided to generate the flexural vibrations A and B in the core rod-shaped vibrating body 4.

11, and a fixed roller (roller part) 12 that rotates the cylindrical rotating body 1 using the bending vibration of the rod-shaped vibrating body 4 as a driving source.
is installed.

One piezoelectric element 1 of the two sets of piezoelectric elements 10.11
As shown in FIG. 4, two band-shaped pressure strips are respectively connected to two side surfaces 13&, 13b of the rod-shaped vibrating body 4 facing each other in the X direction, over substantially the entire length in the longitudinal direction of the rod-shaped vibrating body 4. ! The element 1 consists of OA and TAB, and has the same frequency as the natural frequency in the X direction of the rod-shaped vibrating body 4 (20KHz-50KHz)
When a high frequency voltage of 1 is applied by the high frequency power supply 14,
It expands and contracts in the longitudinal direction, thereby causing the rod-shaped vibrating body 4 to
It is constructed so as to generate a flexural vibration A in the same direction as the direction. The other pressure N, the element 11 is the rod-shaped vibrating body 4
Consisting of two band-shaped piezoelectric elements 11m and 11b, which are joined to the upper and lower surfaces f5m and 15b facing each other in the When a high frequency voltage having the same frequency (20 Kltflz to 50 KHz) as the natural frequency of the body 4 in the
, to generate a deflection vibration B in the same direction as the X direction in the rod-shaped vibrating body 4. The fixed roller 12 has an outer diameter slightly smaller than the inner diameter of the cylindrical rotating body T, is fitted on the outer periphery of the rod-shaped vibrating body 4, and serves as an antinode of the bending vibrations A and H of the rod-shaped vibrating body 4. It is fixed to the part with a plurality of screws 1T.

In this case, in this embodiment, 82! is fixed at both ends! In order to show an A-example, which is designed to generate mode flexural vibrations A and B, both ends and the center of the rod-shaped vibrating body 40 are vibration nodes 2087 and 2Ob', respectively, as shown in FIG.

21) C and has two anti-nodes 21 & 121b, therefore, the fixed roller 12 also has two anti-nodes,
It is provided so as to be located in the center of each belly.

The rotation C1-25 has both ends rotatably supported by bearings 22, and if necessary, the magnetic card 1 is attached to the cylindrical rotating body T.
The height is adjustable so that the pressure can be applied to the desired pressure.

Next, the card conveying operation of the card conveying device 3 having such a configuration will be explained. High frequency voltages are applied to the two sets of piezoelectric elements 10 and 11 by high frequency power sources 14 and 16, respectively, and these are driven in two phases. In this case, the frequency (f) of the high frequency voltage applied to the high frequency power supply 14 and the piezoelectric element 10 (1 (1 m, 10b) is set to be the natural frequency of the rod-shaped vibrating body 4 in the X direction, and the high frequency The frequency (fY) of the high frequency voltage applied from the power source 1G to the element 11 (11m, 11b) is made to match the natural frequency of the rod-shaped vibrating body 4 in the X direction. As mentioned above, the fixed shoulder frequencies are equal, and therefore the frequencies (fx) and (fl) of the applied voltages are also equal to 1 to 1.When each pressure 11t element 1o, ii expands and contracts in its longitudinal direction due to the application of a high-frequency voltage, A flexural vibration B in the B2 mode in the X direction and a BS mode flexural vibration B in the X direction orthogonal to this are generated in the rod-shaped vibrating body 4. Both of these flexural vibrations A and B are standing waves. When the phase of the high frequency voltage applied to the piezoelectric element 10.11 is shifted by 900, both flexural vibrations A and B
Due to the combination of As shown in FIG. 5, P is performing a small rotational movement (horizontal width μ, vertical amplitude ω), and the vibration velocity at mass point P is expressed as v=2πfu (f is the frequency of vibration). The amplitudes ω and μ of the rotational motion at each mass point are maximum at the center of the vibration antinodes 21m and 21b (Fig. 1), and at the nodes 20&.

It becomes zero at 20b and 20c. : ] Furthermore, if the values of the high-frequency voltages applied to the piezoelectric elements 10 and 11 are set to the same magnitude, the orbital motion of the mass points on the surface of the rod-shaped vibrating body 4 will be such that the amplitudes of the flexural vibrations A and B are the same (the amplitudes of the flexural vibrations A and B are the same) 10°11
Since the amount of expansion and contraction is the same), it becomes a circular motion, and if the amplitudes of the flexural vibrations A and H are different, the amplitudes of the flexural vibrations A and H also change, so the one with the larger amplitude becomes a longer elliptical motion.

When such a revolution movement occurs in the rod-shaped vibrating body 4, the fixed row 21 provided at the antinode of the vibration of the rod-shaped vibrating body 4
Since the mass point P on the outer peripheral surface of No. 2 is pressed against the inner peripheral surface of the cylindrical rotating body T as shown in FIG.
In other words, the frictional force between the fixed roller 12 and the cylindrical rotating body 7 causes the cylindrical rotating body 1 to move in the direction of the revolution of the mass point P (
Rotate in the same direction as the arrow C direction in Fig. 5). Therefore, when the magnetic card 1 is interposed between the cylindrical rotating body 1 and the rotating row 28, the frictional force between the card 1 and the cylindrical rotating body 7 causes the magnetic card 1 to be rotated by the cylindrical rotating body T. direction.

In this case, the pressing force that presses the fixed roller 12 against the cylindrical rotating body 1 is obtained by the magnitude of the flexural vibration B in the X direction, and the rotational driving force that rotates the cylindrical rotating body γ is the flexural vibration A in the X direction. If the phase of the high-frequency voltage applied to the piezoelectric element 10.11 is set in the opposite direction (-90°) to that described above, the cylindrical rotating body γ can be rotated counterclockwise in Fig. 3. However, it also allows the magnetic card 1 to be moved back and forth.

〔Effect of the invention〕

As explained above, the card conveying device according to the present invention is provided with a rod-shaped vibrating body fixed at both ends, and drives 92 sets of piezoelectric elements in two phases, so that the rod-shaped vibrating body can be moved in two directions perpendicular to the central axis and mutually. By generating phase-shifted flexural vibrations, the rotational motion accompanying these flexural vibrations frictionally drives a cylindrical rotating body rotatably provided on the outer periphery of the rod-shaped vibrating body, and the cylindrical rotating body and the rotating roller are connected. Since the moving body such as a card interposed between them is configured to move linearly in the direction of rotation of the cylindrical rotary body, the structure is simple, the number of parts can be reduced, and the weight and thickness can be reduced. Since the rotational motion of the surface mass points is directly transmitted to the cylindrical rotating body through the roller part, the driving force transmission efficiency is high.Since gears are not required, the movable body can be moved with high precision.

Can be positioned.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is a perspective view of a rod-shaped vibrating body, Fig. 3 is a cross-sectional view taken along the line of Fig. 1, and Fig. 4 shows a piezoelectric element and its circuit. FIG. 5 is a diagram for explaining the principle of operation. 1...-Magnetic card, 2.e...Card conveyance path, 4.
・・φ rod-shaped vibrating body, 5・φ・・rotating roller, T・φ
Cylindrical rotating body, 8...Bearing, 10.11-...Piezoelectric element, 12...Fixed roller (roller part), 14,1
6...High frequency power supply. Patent applicant: Tamura Electric Urasakusho Co., Ltd.

Claims (1)

[Claims] A rod-shaped vibrating body with both ends fixed and a rotary roller rotatably supported at both ends, which are arranged vertically opposite to each other across a card conveyance path, and rotatably fitted on the outer periphery of the rod-shaped vibrating body via a bearing, a cylindrical rotating body whose outer periphery contacts the circumferential surface of the rotating roller via a moving body; and a cylindrical rotating body joined to the rod-shaped vibrating body,
Two sets of flexural vibrations that are driven in two phases by application of high-frequency voltages with a temporal phase difference of 90° to generate flexural vibrations in two directions perpendicular to the rod-shaped vibrating body at the same frequency and out of phase with each other. a piezoelectric element, which is provided at a position on the outer periphery of the rod-shaped vibrating body at the antinode of vibration, and is pressed against the inner circumferential surface of the cylindrical rotating body by the generation of orbital circular motion accompanying the flexural vibration of the rod-shaped vibrating body; A card conveyance device comprising: a roller section that rotates the cylindrical rotating body.