KR20120010536A

KR20120010536A - Feeder

Info

Publication number: KR20120010536A
Application number: KR1020100072132A
Authority: KR
Inventors: 한형수
Original assignee: 주식회사 한신
Priority date: 2010-07-26
Filing date: 2010-07-26
Publication date: 2012-02-03

Abstract

PURPOSE: A device for transferring and supplying elements by using the vibration generated from a single piezoelectric element is provided to simply a structure by using single a piezoelectric element as a vibration producer. CONSTITUTION: A device for transferring and supplying elements comprises a first block(10), a second block(20), a conveying plate(30), and a piezoelectric unit(40). The first block is installed on a base. The second block is installed on the base to rotate. The conveying plate is located on the first block and second block. The both end part of the conveying plate is respectively fixed to the first block and the second block through the connecting member. The bottom part of the piezoelectric unit is fixed to the first block, and the top end portion of the piezoelectric unit is fixed to the second block.

Description

Component Feeder {Feeder}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component supply apparatus, and more particularly, to an apparatus for generating a vibration using a single piezoelectric element as a vibration generator and for transporting and supplying a component using the vibration.

In general, an electronic component supply apparatus is mainly used as a component supply apparatus for individually transporting and supplying a relatively small component such as an electric component or a mechanical component to a process position.

The electronic component supply apparatus has a structure in which a moving iron core of an electromagnet is connected to and installed on a transfer plate supported by two springs before and after the electromagnet as a driving source, and a fixed iron core wound with an electromagnetic coil is fixed to the base.

In the component supply device having such a structure, when a voltage is applied to the coil, the fixed iron core pulls the movable iron core to bend the spring supporting the transfer plate, and when the phase control voltage is turned off, the transfer plate is restored by the repulsive force of the spring. Vibrates to allow parts to be transferred / supplyed.

In addition to the electronic component supply apparatus having such a structure and function, a piezoelectric component supply apparatus including a plurality of piezoelectric elements as a vibration generator has been developed and used.

However, the piezoelectric part supply device has a problem in that the structure is complicated in that it uses a plurality of piezoelectric elements and that a loud noise occurs when the device is operated. In particular, there are disadvantages in that it is difficult to control voltage supply to a plurality of piezoelectric elements and electrical energy efficiency is low.

The present invention is to solve the above problems of the piezoelectric component supply apparatus, by using a single piezoelectric element as a vibration generator, a component supply apparatus that can achieve a simple structure, noise suppression and energy efficiency improvement The purpose is to provide.

Component supply apparatus according to the present invention for performing the above object is a first block installed on the base; A second block rotatably installed on the base; A transfer plate positioned on the first block and the second block, the both ends of which are fixed to the first block and the second block through connecting members; And a piezoelectric unit fixed at the lower end to the first block and the upper end to the second block, so that the rotation and the horizontal of the transfer plate in the first direction of the second block in accordance with the bending and restoration of the piezoelectric unit by voltage application. Directional conveyance and rotation of the second block in a second direction opposite to the first direction and horizontal conveyance of the conveying plate are repeated to convey the components on the conveying plate.

In the present invention, the first block is connected to the base by a first plate spring, and the second block is disposed by the second plate spring in a state spaced apart from the surface of the base by a predetermined distance and corresponding to the first block. It is connected to the base, so that the second block can rotate relative to the connection in accordance with the bending and restoration of the piezoelectric unit.

Preferably, the transfer plate has a first end connected to the first block via a third plate spring and a second end connected to the second block via a fourth plate spring.

The piezoelectric unit used as the vibration generator in the present invention includes a piezoelectric element to be supplied with power and first and second connection portions respectively mounted to both ends of the piezoelectric element and fixed to the first block and the second block, respectively.

The present invention as described above can implement a component transfer device having a simple structure because a single piezoelectric element is used as the vibration generator, it is possible to significantly reduce the noise generated during the transfer of components, and also to improve the energy efficiency You can expect.

1 and 2 are front and side views of a component supply apparatus according to the present invention.
Fig. 3 is a diagram corresponding to Fig. 1 and showing a state when an alternating voltage is applied to the piezoelectric element of the piezoelectric unit.

Hereinafter, with reference to the accompanying drawings of the present invention will be described in detail.

1 and 2 are front and side views of a component supply apparatus according to the present invention, wherein the component supply apparatus according to the present invention includes a base 100 and a first end of the base 100 (for example, a component alignment to be described later). A first block 10 located on the corresponding part of the device and connected to the base 100, a second end of the base 100 (an end opposite to the first end, for example a part pick-up device) Located on the second block 20, the first block 10 and the second block 20 and connected to the base 100, both ends of the first block 10 and the second block ( A transfer plate 30 fixed to 20, respectively; And a lower portion of the piezoelectric unit 40 fixed to the first block 10 and an upper portion of the second block 20.

Hereinafter, the structure of each member which comprises the component supply apparatus which concerns on this invention, and the connection relationship between adjacent members are demonstrated concretely through each figure. Here, reference numeral “B” in FIG. 2 indicates a fastening screw for fixing each member to a corresponding member, which is not shown in FIG. 3 for convenience.

First block 10

The first block 10 disposed at the first end of the base 100 may be fixed to the base 100 or connected by the first plate spring 51 as shown in the drawing. Although the shape of the first block 10 is not limited, the fixing portion in which the end portion (lower end) of the piezoelectric unit 40 is fixed to the lower region within a range that does not affect the bending and restoration of the piezoelectric unit 40. It should be provided.

Second block 20

The second block 20 disposed at the second end of the base 100 is spaced apart from the surface of the base 100 by a predetermined distance and in a state corresponding to the first block 10. As shown in the figure, the second block 20 may be connected to the base 100 through the second plate spring 52. The shape of the second block 20 is also not limited, but should be provided with a fixing part for fixing the end portion (upper end) of the piezoelectric unit 40 to an upper region that does not affect the bending and restoration of the piezoelectric unit 40. do.

Transfer plate (30)

The transfer plate 30 is disposed on the first block 10 and the second block 20. The first end of the transfer plate 30 (left end of FIG. 2) is connected with an alignment unit (eg bowl) for aligning the parts, the second end being the opposite end of the first end is transferred plate Corresponds with, for example, the pickup unit for transferring the parts conveyed along the 30 to the process position.

The first end of the transfer plate 30 is connected to the first block 10 via the third plate spring 53, and the second end is connected to the second block 20 via the fourth plate spring 54. do. On the other hand, the upper surface of the transfer plate 30 is formed with a rail portion 31 (or groove) for guiding the transfer of the component.

On the other hand, as shown in FIG. 2, each plate spring 51, 52, 53, and 54 may be two unit plate springs (shown as second plate spring 52) or a single plate spring of a large area (fourth). Plate spring 54), so that each block 10 and 20 and the transfer plate 30 are sufficiently supported by the base 100 by each plate spring.

Piezoelectric Unit 40

The piezoelectric unit 40 includes a piezoelectric element 43 to which power is supplied and first and second connection portions 41 and 42 mounted at both ends of the piezoelectric element 43, respectively. The first connection portion 41 of the piezoelectric unit 40 is fixed to the second block 20, and the second connection portion 42 is fixed to the first block 10.

Meanwhile, although the piezoelectric element 43 used in the present invention has a general structure, the configuration and operation principle of the piezoelectric element 43 will be briefly described for the convenience of understanding.

The piezoelectric element includes a plate spring having a predetermined area and two piezoelectric ceramics (mainly made of lead zirconate titanate) attached to both sides of the plate spring, and on both surfaces of each piezoelectric ceramic, (+) electrodes and (−) Install the electrode.

Here, the two piezoelectric ceramics are equally arranged with respect to the plate spring. That is, of the two surfaces of the two piezoelectric ceramics, the electrodes of the surface corresponding to the plate springs are arranged with two piezoelectric ceramics so as to have polarities opposite to each other.

In this arrangement state, when two piezoelectric ceramics are commonly made of one pole and the plate spring is made of one pole, the strains of the two piezoelectric ceramics are in the same direction when voltage is applied from the outside. That is, the two piezoelectric ceramics are bent in the same direction, so that the plate springs are also bent in the same direction.

Since the bending direction of the piezoelectric ceramic is changed by the polarity of an external electric field, when an alternating voltage is applied, the piezoelectric element repeatedly bends left and right in synchronization with the frequency of the alternating current, and thus bending vibration occurs.

The function of the component supply apparatus according to the present invention configured as described above will be described in detail with reference to the drawings.

3 is a diagram corresponding to FIG. 1 and showing a state when an AC voltage is applied to the piezoelectric element 43 of the piezoelectric unit 40. In the following description, "left" and "right" are directions defined with reference to FIGS. 1 and 3, but are not limited thereto.

Parts aligned in the alignment unit (not shown) disposed at the first end (left end) of the transfer plate 40 are sequentially transferred onto the transfer plate 40, together with the piezoelectric elements of the piezoelectric unit 40. An alternating voltage is applied to the 43.

As the AC voltage is applied, the piezoelectric element 43 of the piezoelectric unit 40 is bent to the left based on the second connection portion 42 fixed to the first block 10 (state of FIG. 3), and then to the right side. It returns to the state of FIG. While the alternating voltage is continuously applied, the above bending and returning operations of the piezoelectric elements 43 are repeated.

By bending to the left side of the piezoelectric element 43 as described above, the second block 20 to which the first connecting portion 41 of the piezoelectric unit 40 is fixed rotates to the left side. That is, since the lower end of the second block 20 is fixed to the base 100 by the second plate spring 52, when the piezoelectric element 43 is bent to the left side (see FIG. 2), the second block 20 rotates to the left about the lower end.

As a result, a force acts on the fourth plate spring 54 in which one end (lower end) is fixed to the second block 20, so that the fourth plate spring 54 is also bent to the left.

As the fourth plate spring 54 rotates, the transfer plate 30 to which the upper end of the fourth plate spring 54 is fixed is transferred a predetermined length to the left while descending a predetermined height, and at the same time, the first plate of the transfer plate 30 The third plate spring 53 fixed to the end portion is bent to the left. At this time, the falling height and the horizontal conveying length of the transfer plate 30 is of course proportional to the amount of bending of the fourth plate spring 54.

In this state (state of FIG. 3), as the AC voltage is applied as described above, the piezoelectric element 43 of the piezoelectric unit 40 is based on the second connection portion 42 fixed to the first block 10. Bends to the right

By bending to the right side of the piezoelectric element 43, the second block 20 on which the first connecting portion 41 of the piezoelectric unit 40 is fixed also rotates to the right side. As a result, a force acts on the fourth plate spring 54 whose one end (lower end) is fixed to the second block 20, so that the fourth plate spring 54 rotates to the right.

As the fourth plate spring 54 rotates, the transfer plate 30 on which the upper end of the fourth plate spring 54 is fixed returns to the position shown in FIG. 1, and then the above process is repeatedly performed. Meanwhile, in this process, not only the force due to the bending of the piezoelectric element 43 but also the restoring force of each of the plate springs 53 and 54 are also generated.

As described above, the transfer plate 30 is repeatedly moved back and forth (left and right directions in FIG. 3) within a predetermined length and is moved up and down by the repeated bending and returning motion of the piezoelectric element 43 of the piezoelectric unit 40. Repeated movement of a predetermined height. Therefore, the parts conveyed from the outside onto the conveying plate 30 are conveyed forwardly (in the direction of the arrow in FIG. 3) by the forward and backward repetitive movement (ie, vibration) of the conveying plate 30.

Here, the transfer in the left direction of the transfer plate 30, that is, the direction opposite to the component transfer direction, is made only by the force of bending of the piezoelectric element, so that the position of the component placed on the transfer plate 30 is greatly changed. I never do that.

However, the transfer in the right direction of the transfer plate 30, that is, the component transfer direction, is made not only by the bending force of the piezoelectric element but also by the restoring force of the respective plate springs 53 and 54, and thus on the transfer plate 30. The parts placed on the surface are conveyed in the conveying direction.

The embodiments disclosed herein are only selected and presented as the most preferred embodiments in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not limited or limited only by this embodiment, Various changes, additions, and changes are possible without departing from the spirit of the invention, and of course, other equivalent embodiments may be implemented.

For example, in the above description, although the positional relationship between the piezoelectric unit and the transfer plate has not been described and illustrated, in order to efficiently perform horizontal transfer of the transfer plate by the operation of the piezoelectric unit (piezoelectric element), the piezoelectric unit may be moved to the center portion of the transfer plate. It is preferable to arrange at the bottom.

Claims

In the part conveying device for conveying the aligned parts,
A first block installed on the base;
A second block rotatably installed on the base;
A transfer plate positioned on the first block and the second block, the both ends of which are fixed to the first block and the second block through connecting members; And
The lower end includes a piezoelectric unit fixed to the first block and the upper end to the second block,
Rotation of the second block in the first direction and horizontal transfer of the transfer plate and rotation and transfer plate of the second block in the second direction opposite to the first direction according to the bending and restoration of the piezoelectric unit by voltage application Horizontal conveyance of the part is repeated, the component conveying apparatus, characterized in that the components on the conveying plate is conveyed.

The second plate spring of claim 1, wherein the first block is connected to the base by a first plate spring, and the second block spring is disposed spaced apart from the surface of the base by a predetermined distance and corresponding to the first block. And the second block is connected to the base by the second block according to the bending and restoration of the piezoelectric unit.

The device of claim 1, wherein the transfer plate has a first end connected to the first block via a third plate spring, and the second end connected to the second block through a fourth plate spring.

The piezoelectric unit of claim 1, wherein the piezoelectric unit is disposed below the central portion of the transfer plate, and is mounted on both ends of the piezoelectric element and the piezoelectric element to which power is supplied, respectively, and is fixed to the first block and the second block, respectively. Component conveying device comprising two connections.