JP2002046844A - Component carrier and component carrying method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To do away with conventional transfer of a carried object by resonant vibration of a mechanical system mainly comprising a spring, not causing a jump of the carried object from a carrier path, to increase a transfer speed of the carried object without limit. SOLUTION: In this component carrier, the carried object is transferred by upper side elliptical vibration of a trough of a maximum vertical acceleration >=1.5 G. The component carrier comprises the trough, a middle support body, a base, and a vertically driving piezoelectric actuator and a horizontally driving piezoelectric actuator connecting among the trough, the middle body and the base.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a component transfer device and a component transfer method.

[0002]

2. Description of the Related Art In general, an elliptical vibration feeder utilizes a horizontal spring and a vertical spring, and resonates and vibrates them with an electromagnet or the like, thereby causing an elliptical trajectory to vibrate so as to transfer a conveyed object. . In addition to the elliptical vibration, the speed of the vibration transportation of the spring system is adjusted by the amplitude in order to make the vibration of the system and the frequency of the drive power supply substantially coincide with each other.
In the case of the elliptical vibration, it is performed by adjusting the horizontal and vertical amplitudes and their phases, but the speed is not adjusted by the frequency.

[0003] The conventional transport principle in elliptical vibration is that the transported object is transported by using the locus below the elliptical locus, and is sequentially moved forward by returning the path while being lifted upward at the forward end. It is a way to let it.

[0004]

As described above, the conventional elliptical vibration feeder utilizes the resonance vibration of a mechanical system mainly composed of a spring, so that the transport speed is naturally limited. In other words, theoretically, the transport speed of the conveyed material increases in proportion to the increase in the horizontal frequency, but there are actually optimal conditions at a constant frequency according to the amplitude and elliptic ratio. If it exceeds, the transport speed will be reduced. This is a prerequisite for improving transport efficiency that the transported material should not jump from the route due to the previous transport principle, and if it exceeds the limit value at which it will jump from the route, it will cause a collision with the route. This is because an increase in the vertical vibration amplitude is not preferable because the generated form of the conveyed object causes irregular and unstable transportation.

[0005] Therefore, conventionally, although the transport speed can be controlled only by adjusting the horizontal component of the vibration, the vertical acceleration must be kept constant within a range where irregularities of the transported object do not occur. As a result. This cannot be eliminated as long as a spring-based vibrator is used, and at present it is necessary to pursue how to perform horizontal resonant vibration at an optimal phase angle. .

[0006]

In view of the above problems, the present inventor has made the present invention as a result of intensive studies.
In a method of transferring a conveyed object by causing a linear trough to perform elliptical vibration, it is an object of the present invention to convey a conveyed object by an upper elliptical vibration of an elliptical vibration trajectory of the trough having a maximum vertical acceleration of 1.5 G or more.

According to another aspect of the present invention, there is provided an apparatus for transferring a conveyed article by causing a linear trough to oscillate elliptically, and a horizontal drive for connecting the trough, an intermediate support, a base, and each member. It is constituted by a piezoelectric actuator and a piezoelectric actuator for vertical drive.

[0008] Here, the trough in this specification means that a conveyed object is transferred by performing an elliptical vibration. In the present invention, the transfer of the conveyed object by the vibration on the upper side of the elliptical vibration is maximum. The feature of. The component transfer device according to the present invention is configured by a trough, an intermediate support, and a base, and by directly connecting each member with a piezoelectric actuator for horizontal drive and a piezoelectric actuator for vertical drive,
The transported object can be transported along the upper elliptical trajectory, and ultra-high-speed vibration transport can be performed. Therefore, in the case of the present invention,
Conveyed objects are transferred in the opposite direction to conventional elliptical vibration transport.

The transfer of the conveyed object by the elliptical trajectory on the upper side of the elliptical motion can be performed by setting the maximum vertical acceleration to 1.5 G or more. In the component transfer device and the component transfer method according to the present invention, as a practical operating condition, the frequency is 100 Hz to 10 Hz.
00 Hz, total horizontal amplitude 0.5 mm to 1.0 mm, vertical total amplitude 0.1 mm to 0.2 mm, and can be achieved by forcibly vibrating with a piezoelectric actuator. In addition, regarding the coefficient of friction between the conveyed object and the transport path, the conveyed object is transferred on the upper side of the elliptical orbit, so that the high-speed transfer can be performed in any state regardless of the friction coefficient.

[0010] In the present invention, since high-speed transfer is intended by increasing the frequency, the base (machine portion) is used.
Vibration is a problem. This is not a problem as long as the mass of the movable part such as the trough is negligible with respect to the base, but generally, the influence of vibration generated on the base during actual operation increases. As a countermeasure against this, for example, by providing a balancer on a movable portion such as a trough, it becomes possible to cancel the vibration.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 shows an example of an embodiment of a component conveying apparatus 1 according to the present invention, in which a trough 2, an intermediate support 3,
A vertical drive piezoelectric actuator 5 between the trough 2 and the intermediate support 3 and a horizontal drive piezoelectric actuator 6 between the intermediate support 3 and the base 4 It is. By controlling each piezoelectric actuator with an inverter, the trough 2 performs an elliptical vibration.

In the component conveying apparatus 1 of the present invention, the frequency can be adjusted over a wide range because of the forced vibration that does not utilize resonance. High-speed transport in the direction of

As a result of the experiment, in the component conveying apparatus 1 of this embodiment,
When the total amplitude in the vertical direction was 0.2 mm, the total amplitude in the horizontal direction was 1.0 mm, and the frequency was 300 Hz, the transported object A could be transferred at a transport speed of 56 m / min. In addition, it is easy to increase the size of the component conveying device 1, and the component conveying device 1 has a size of 20 m to 50 m.
The vibration conveyor can be made compact,
Uniform transport over the entire length is possible.

FIG. 2 shows another embodiment of the component conveying apparatus 1 according to the present invention, in which a vertical balancer 7 and a horizontal balancer 8 are provided for the trough 2 and the intermediate support 3, respectively. Unnecessary vibration is hardly generated. This is because the vertical driving piezoelectric actuator 5 is provided on the intermediate support 3.
The vertical vibration can be canceled by providing the vertical balancer 7 via. Further, the base 4 has a structure in which a horizontal balancer 8 is provided via a horizontal driving piezoelectric actuator 6 to cancel the vibration in the horizontal direction so that the base 4 does not generate vibration.

[0016]

As described above, the component transport apparatus and the component transport method according to the present invention provide a method for transporting a conveyed object by elliptically oscillating a linear trough.
Transporting the conveyed object by the elliptical vibration on the upper side of the elliptical vibration trajectory of the trough which is set to 5 G or more. And a device for transferring a conveyed object by causing a linear trough to perform an elliptical vibration and comprising a trough, an intermediate support, a base, and a piezoelectric actuator for horizontal drive and a piezoelectric actuator for vertical drive for connecting between members. This makes it possible to transfer a conveyed object at a high speed with a very simple configuration. In addition, since the structure is compact, it is easy to increase the size, which has a very useful effect in practical use.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an example of an embodiment of a component transport device according to the present invention.

FIG. 2 is a schematic side view showing another example of the embodiment of the component transport device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Component conveyance apparatus 2 Trough 3 Intermediate support body 4 Base 5 Vertical drive piezoelectric actuator 6 Horizontal drive piezoelectric actuator 7 Vertical balancer 8 Horizontal balancer A Conveyed object

Claims (4)

[Claims] 1. A method for transferring a conveyed object by oscillating a linear trough by elliptical vibration, wherein the conveyed object is transferred by an upper elliptical vibration of an elliptical vibration trajectory of the trough having a maximum vertical acceleration of 1.5 G or more. A component conveying method characterized by the following. 2. The component conveying method according to claim 1, wherein the elliptical vibration is formed by a horizontal driving piezoelectric actuator and a vertical driving piezoelectric actuator. 3. A horizontal driving piezoelectric actuator and a vertical driving piezoelectric actuator for connecting a trough, an intermediate support, a base, and respective members in an apparatus for transferring a conveyed object by causing a linear trough to perform an elliptical vibration. And a component conveying device. 4. The component conveying apparatus according to claim 3, further comprising a horizontal balancer and a vertical balancer for the trough and the intermediate support.