JP2009284710A - Reciprocating rotating actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reciprocating rotating actuator outputting at least two kinds of rotational-angle displacements by one output shaft. <P>SOLUTION: A reciprocating and rotating rotor (11) and a cam (21) are link-engaged by using a rotary solenoid (1) for reciprocating rotating output as a driving source. The cam (21) is reciprocated and rotated at a predetermined link ratio, and the reciprocation and rotation are transferred to the outside as a reciprocating torque through a camshaft (20). Two kinds or more of reciprocating torques are output by properly controlling the rotation of the cam in this case. A magnetic coil (30) is arranged as the control means, a movable plate is separated and moved by a magnetic-force operation from the magnetic coil, and a stopper (38) formed on the movable plate is forwarded on the rotational locus of the cam to control the angle of rotation of the cam. An urging means (35) separating the movable plate from the magnetic coil is arranged at the same time. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The invention according to the present application (hereinafter referred to as “the present invention”) relates to a reciprocating rotary actuator that outputs axial rotational forces of two or more rotation angles from a single camshaft.

  The normal type rotary actuator reciprocates within a predetermined angle range. This is used, for example, as a drive source for a guide piece (blade) that switches the moving path of a paper sheet or bill that moves and moves. This movement route has various routes depending on the device, and there is a route method in which the route is switched as necessary to flow in two directions or three directions.

  For example, this three-way switching technique is disclosed in paragraph numbers [0033], [0100] to [0103], etc. of the specification of “circular banknote depositing and dispensing machine” in Patent Document 1. In this method, a guide member serving as a branching means having a three-way switching mechanism is rotated by a branching motor using a stepping motor. This is a configuration in which an input pulse of the stepping motor is controlled to rotate at the rotation angle of the output shaft to temporarily hold the guide means. However, the configuration using such a stepping motor has the merit that it is possible to set many types of rotation angles with a single output shaft, but if the switching speed is increased for high-speed processing, the problem of stepping out will occur. was there. In addition, in order to hold and place the blade in the switched state, it is necessary to always excite it, and there is a problem in terms of power saving.

  As another known technical example, a “paper sheet transport direction switching device” disclosed in Patent Document 2 is disclosed. As is apparent from Drawing 1 of the abstract, the three-way switching of the paper sheet transport path is performed by rotating one gate means with one drive means, and controlling the rotation of the gate means. This is a mechanism for performing the above with another driving means. A direct acting solenoid is used as the driving means.

However, such a three-way switching mechanism using two direct acting solenoids is performed by two direct acting solenoids arranged individually, so that the number of parts is increased and the two direct acting solenoids cooperate with each other. Therefore, the adjustment for the operation is complicated, and there is a problem in the reliability and durability of the device.
JP 2006-127131 A JP 2006-213528 A

  Therefore, the present invention provides a reciprocating rotary actuator that enables output of two or more rotation angles with a single output shaft for the purpose of solving the above problems.

  The reciprocating rotary actuator of the present invention is configured as follows in order to achieve the above object.

  That is, a rotary solenoid (1) that is fixedly supported and reciprocally rotates, a cam (21) that is reciprocally rotated at a predetermined link ratio by being linked with the rotor (11) of the rotary solenoid (1), and the cam ( The camshaft (20) that outputs the reciprocating rotation of 21) to the outside and the restricting means (3) that appropriately restricts the rotation of the cam (21) are characterized by the following.

  The link engagement between the rotary solenoid (1) and the cam (21) is a link engagement for the purpose of obtaining a rotational force for both input and output, and the structure of the link engagement is that of the rotary solenoid (1). The engaging pin (18) provided on the rotating surface of the rotor (11) and configured to be movable along the rotating radius of the rotor (11) and the cam (21) move along the rotating radius direction. This is due to the fitting with the allowed engagement port (22).

  Further, as a means for restricting the rotation angle of the cam (21), an electromagnetic coil (30) fixedly supported by a base or the like, and a magnetic material disposed so as to be freely movable by the magnetic force action from the electromagnetic coil (30) Or a movable plate made of a magnet, a stopper (38) that abuts against the cam (21) by advancing on the rotation path of the cam (21) according to the movement of the movable plate (31), and the movable plate (31). ) And an urging means (35) for separating the electromagnetic coil (30) from each other. Further, as the urging means, a repulsive magnetic force by an electromagnetic coil may be used in addition to a spring means using elastic strain of a member such as a spring, a coil spring or a leaf spring.

  In addition, the numbers in parentheses in the claims of the claims of the separate document and the description of the means for solving the problems of this document are added as a reference for understanding the invention, and these numbers are attached. It is not limited to the configuration and shape on the drawing.

  In the present invention configured as described above, the rotation angle of the reciprocating rotor can be converted to a rotation angle of a predetermined link ratio and output as a reciprocating rotation, and the rotation of the cam linked to the rotor can be rotated. By appropriately restricting, a so-called (multi-mode) output in which a reciprocating rotational force having two (or more) rotational angles is output from a single output shaft can be realized.

  Since this configuration can be configured with a smaller dedicated volume, the degree of freedom of the mounting location is increased, and various devices that require switching between multi-paths of bill and paper flow paths (for example, automatic deposit and withdrawal) Machines (ATM), printers, vending machines, etc.). In addition, since a solenoid is used as the operating source, reliable operation and reliability can be obtained.

  Next, the configuration of the best mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view showing each component of the present embodiment exploded from the rear side (rear cover side), and FIG. 2 is an exploded perspective view shown from the front side (external output side). 3 is a longitudinal sectional view of the present embodiment.

First, main components of the present embodiment are a rotary solenoid 1 as a driving source, an output element 2 that passively outputs this driving force, and a regulating means 3 that regulates the operation of the output element 2. It consists of These are housed in a bottomed cylindrical rear cover 4 and a casing whose opening is closed by a front plate 5.
These will be described below.

[Configuration of rotary solenoid]
The rotary solenoid 1 as a drive source has an electromagnetic coil (referred to as a “rear electromagnetic coil 10”) disposed on the bottom side of the rear cover 4 and a substantially fan shape that is excited and oscillated (reciprocating rotational movement). It consists of a rotor 11 to be presented. The rear electromagnetic coil 10 has a rear core 12 disposed at the center, and is fixedly supported on the inner side of the rear cover 4 via a base plate 13. A shaft 15 located outside the rear electromagnetic coil 10 is attached to the rotor 11 via a hub 14. The shaft 15 extends to the amateur side (rear side) and is rotated to the rear cover 4 by a rear bearing 40. It is attached freely.

  On the amateur surface 11a of the rotor 11, two magnets 16 in which different polar surfaces are arranged in the rotation direction are arranged in an embedded state. In the present embodiment, the two magnets 16 separately used as described above are used. However, the present invention is not limited to this, and a single magnet with one side magnetized with different polarity may be arranged. Good. Further, a back yoke 17 is provided on the back side (front side) of the arrangement of the magnet 16 in the rotor 11 to block leakage of magnetic lines of force to the front side.

  In addition, a cylindrical engagement pin 18 is formed in a standing manner in a direction opposite to the armature surface 11a (front direction) at an intermediate position of the outer peripheral edge of the rotor 11. In the present embodiment, the engagement pin 18 is fixed at one place. However, although not shown, the engagement pin 18 may be configured to be movable along the rotation radius of the rotor (11). For example, the attachment hole of the engagement pin 18 may be formed in a long hole shape along the rotation radius, and the adjustment pin may be appropriately adjusted and attached in the longitudinal direction (rotation radius direction). Thereby, the link ratio described later can be set appropriately.

  With this configuration, the rotor 11 of the rotary solenoid 1 repeats magnetic attraction and magnetic repulsion with the magnet 16 facing the magnetic pole by switching the energization direction to the rear electromagnetic coil 10, and reciprocates around the shaft 15. Will be done. Although the range of motion of the rotor 11 is regulated by contact with the inner surface of the rear cover 4, a stopper portion (for example, a buffer portion) may be formed separately.

[Configuration of output element]
The output element 2 functions as means for outputting a rotational rotational force passively linked to the rotary solenoid 1 to the outside.

  The output element 2 is mainly composed of a cam shaft 20 arranged in a positional relationship parallel to the shaft 15 of the rotary solenoid 1. A cam 21 extending in a radial direction from the camshaft shaft is integrally formed at the rear end (case bottom side) of the camshaft 20. The cam 21 is arranged in a positional relationship parallel to the amateur surface 11a of the rotor 11, and has a long hole-like engagement port 22 into which the engagement pin 18 can be fitted and slid. The longitudinal direction of the mouth shape of the engagement port 22 is along the rotational radius direction (radial direction) of the rotating cam 21. In this embodiment, the engagement port 22 is formed in an opening through which the cam 21 passes. However, the engagement pin 18 is fitted to the engagement port 22 to ensure a rotational force while allowing radial movement. As long as it has a function that can be performed, it is not always necessary to penetrate, and it may be formed in a long groove shape.

  In addition, contact surfaces 23 that are inclined inward are formed at both ends of the peripheral edge along the rotation direction of the cam 21.

[Composition of regulatory measures]
Next, the regulating means 3 for regulating the rotation angle of the rotor 11 of the rotary solenoid 1 in a timely manner will be described.

  FIG. 4 shows an example of the regulating means 3. (1) is a plan view of the front plate from the rear side, (2) is a left side view of (1), and (3) is from the rear side. FIG.

  An electromagnetic coil (referred to as “front electromagnetic coil 30”) arranged at the front is provided with a front core 32 at the center and attached to the back side (rear side) of the front plate 5 via an attachment plate 33. The front electromagnetic coil 30 is provided with a substantially rectangular flat plate-shaped movable plate 31 made of a magnetic material or a magnet material so as to face the magnetic poles.

  The movable plate 31 is held upright by the two posts 34 which are erected on the front plate 5 and arranged in parallel on both sides of the front electromagnetic coil 30 so as to be freely movable in the axial direction (perpendicular to the magnetic pole surface). Yes.

  The post 34 is provided with a coiled spring 35 as an urging means for separating the movable plate 31 from the front electromagnetic coil 30. Further, a flange 36 that restricts the movement limit of the movable plate 31 is formed at the tip of the post 34.

  With this configuration, the movable plate 31 moves on the post 34 in the axial direction (arrow a, arrow b) by receiving a repulsive force or a magnetic force effect of attraction force by exchanging the polarity of the front electromagnetic coil 30.

  When the front electromagnetic coil 30 is not energized, no magnetic force is generated, but the movable plate 31 is urged and moved in the direction of the cam (21) (arrow a) by the extension force of the spring 35, and is moved to the flange 36 of the post 34. The abutted state is maintained. The movable plate 31 may be moved by generating a repulsive magnetic force in the front electromagnetic coil 30.

On the other hand, when the front electromagnetic coil 30 is excited to generate an attractive magnetic force, the movable plate 31 overcomes the extension force of the spring 35 and moves toward the front electromagnetic coil 30 (arrow b). In the case where the movable plate 31 is made of a magnet and the attractive magnetic force is set to be larger than the extension force of the spring 35, even if the front electromagnetic coil 30 is not energized, In combination, it is possible to maintain the state of being in contact with the front electromagnetic coil 30.

  Further, an extended portion 37 extending further downward is formed at a substantially central portion of the lower end edge of the front plate 5, and a part of the lower end at the center is bent at a substantially right angle toward the cam 21. Thus, a stop pad 38 is formed. The formation method and shape of the stopper 38 are not limited to this, and may be configured separately in various shapes as long as the same function is achieved.

[Explanation of the operation process of this embodiment]
Next, the operation process of the present embodiment configured as described above will be described with reference to the drawings.
The present embodiment is a reciprocating rotary actuator having a specification (mode) for outputting two or more types of rotation angles with a single output shaft. The following description of the operation will be described by taking two types of modes as an example. The first mode is a reciprocating rotational drive (hereinafter referred to as “sequential drive”) with a predetermined displacement angle (for example, 20 degrees), and the second mode is a displacement angle exceeding the displacement angle of the first mode (for example, , 120 degrees), a reciprocating rotational drive (referred to as “switching drive”).

  FIG. 5 is an explanatory diagram showing the operation status of the sequential drive in the present embodiment, and FIG. 6 is an explanatory diagram showing the operation status of the switching drive in the present embodiment.

  First, with the above-described configuration, when the rotary solenoid 1 is activated, the rotor 11 reciprocates within a rotation angle range of 32 degrees with the shaft 15 as an axis. This rotation angle is regulated by the contact of the rotor 11 with the inner wall surface of the rear cover 4, and in this embodiment, the maximum reciprocating rotation angle is regulated to 32 degrees.

  Next, the engaging pin 18 formed on the rotor 11 engages with the engaging port 22 formed on the cam 21 of the output element 2 to perform the link operation, so that the rotational force of the rotor 11 is generated at a predetermined link ratio. It is transmitted to the cam 21 as a rotational force. As a result, the camshaft 20 outputs a reciprocating rotational force having a predetermined rotational angle. In the present embodiment, the ratio of the inter-axis distance m between the shaft 15 and the engagement pin 18 and the inter-axis distance n between the engagement pin 18 and the cam shaft 20 is set to 15: 4. According to this link ratio, a 120 degree rotation angle is output from the camshaft 20.

  Based on the above configuration, the sequential drive is a drive in which the front electromagnetic coil 30 of the restricting means 3 is performed in a non-energized state. At this time, the movable plate 31 to which no magnetic force acts is pressed against the flange 36 of the post 34 by the extension force of the spring 35 (arrow a). As a result, the stopper 38 formed at the lower portion of the movable plate 31 advances on the rotation path of the cam 21 and comes into contact with the contact surface 23 of the cam 21 (the state shown in FIG. 5 (2)). Since the contact surface 23 is formed with a predetermined inclination (inclination toward the rotation axis) with respect to the radial direction, the stopper 38 abuts vertically at the time of contact, and the operation is reliable. And durability is improved. In the present embodiment, the cam 21 is regulated by the stopper 38 when the rotation of the cam 21 is rotated 20 degrees (right rotation CW in the drawing) from the initial state (the state shown in FIG. 5 (1)). A reciprocating rotation in the range of 20 degrees is output from 20.

  In this embodiment, the state shown in FIG. 5 (1) is the initial state. However, as shown in FIG. 6 (2), the state where the cam 21 is rotated to the right limit can be set as the initial state. is there. In this case, the stopper 38 abuts and regulates during left rotation (CCW). Thus, the reciprocating rotary actuator of each specification can be manufactured by changing the initial setting.

  Next, the switching drive is a drive in a state in which the stopper 38 is detached from the engagement port 22 as shown in (1), (2), and (3) of FIG. This state is a state in which the front electromagnetic coil 30 of the regulating means 3 is excited to attract the movable plate 31 by overcoming the extension force of the spring 35 (arrow b). In order to maintain this attractive state, it is necessary to energize the front electromagnetic coil 30 to generate an attractive magnetic force, but in the configuration of the present invention, the movable plate 31 is configured by a magnet as described above. The suction state can be maintained even when no power is supplied.

  As described above, since the reciprocating rotary actuator according to the present invention is compact and has high reliability and power saving, it is used as a drive source for a guide piece for ATM banknote flow path selection, or for a printer or copier. The present invention can be applied to a drive source for a flow path sorting guide piece of paper and has high industrial applicability.

It is the disassembled perspective view which decomposed | disassembled each component of this embodiment and showed from the rear side. It is the disassembled perspective view which decomposed | disassembled each component of this embodiment and showed from the front side. It is a longitudinal cross-sectional view of this embodiment. FIG. 2 shows the regulating means of the present embodiment, (1) is a plan view of the front plate from the rear side, (2) is a left side surface of (1), and (3) is a perspective view shown from the rear side. is there. It is explanatory drawing which shows the operating condition of the sequential drive in this embodiment. It is explanatory drawing which shows the operating condition of the switching drive in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotary solenoid 10 Electromagnetic coil 11 Rotor 16 Magnet 18 Engagement pin 2 Output element 20 Cam shaft 21 Cam 22 Engagement port 3 Restriction means 30 Electromagnetic coil 31 Movable plate 35 Spring 38 Stopper

Claims (4)

A rotary solenoid (1) fixedly supported and reciprocatingly rotated;
A cam (21) that is linked with the rotor (11) of the rotary solenoid (1) and reciprocates at a predetermined link ratio;
A camshaft (20) for outputting the reciprocating rotation of the cam (21) to the outside;
Restricting means (3) for appropriately restricting rotation of the cam;
A reciprocating rotary actuator characterized by comprising: The link engagement between the rotary solenoid (1) and the cam (21)
An engagement pin (18) provided on the rotation surface of the rotor (11) and configured to be movable along the rotation radius of the rotor (11);
The reciprocating rotary actuator according to claim 1, characterized in that the reciprocating rotary actuator is a fitting with an engaging port (22) which allows the cam (21) to move along the rotational radius direction. Regulating means (3)
A fixedly supported electromagnetic coil (30);
A movable plate made of a magnetic material or a magnet arranged so as to be freely movable by the magnetic force action from the electromagnetic coil (30);
A stopper (38) that abuts on the cam (21) by advancing on the rotation path of the cam (21) according to the movement of the movable plate (31);
Biasing means (35) for separating the movable plate (31) from the electromagnetic coil (30);
The reciprocating rotary actuator according to claim 1, 2, or 3.   4. The reciprocating rotary actuator according to claim 1, wherein the biasing means is a spring means or a repulsive magnetic force means.

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