JPH028109A - Vibrating parts feeder - Google Patents

Abstract

PURPOSE:To promote a Lissajous vibration by setting up a first plate spring provided with a piezoelectric element in a lower mass body so as to extend a major axis in the vertical direction, and attaching the central part of a second plate spring, whose both ends are clamped to an upper mass body and slanted, light to the upper end. CONSTITUTION:A parts vessel 11 is installed on top of an upper mass body 12. In two spots on an under surface of the upper mass body 12, there are provided with projections 12a, 12b different in length each, to which both ends of a second plate spring 16 large in springing properties are tightly attached and obliquely set up there. On top of a lower mass body 13, there is provided with a projection 13a in corresponding to the central part of these projections 12a, 12b, and a lower end of a first vertical plate spring 14 is tightly attached to this projection 13a. A vibrating piezoelectric element 17 is attached to this plate spring 14. A mounting member 15 is installed in an upper end of this vertical plate spring 14, and the central part of the second plate spring 16 slanted is screwed down. With this constitution, vertical vibration is produced with a specified phase difference to a horizontal vibration phase angle, so that the vessel 11 is subjected to a Lissajoues vibration, thus parts conveyance becomes ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibrating component supply device, and is particularly directed to improving the vibration system.

A conventional parts supply device will be explained according to the drawings. In Figures 1 and 2, reference numeral 1 denotes an inverted truncated cone-shaped parts container for storing parts, and a parts feeding path called a track is provided inside, and the parts are aligned on the track by vibration of the whole. , and are sent out in a predetermined direction.

Reference numeral 2 denotes a disk-shaped upper mass body, on the upper surface of which the component container 1 is mounted, and on the lower surface thereof a plurality of protrusions 2a are provided in the circumferential direction. 3 is a lower mass body, and a convex portion 2 is formed on the circumference of the upper surface of the lower mass body.
Convex portions 3a are provided so as to correspond to a. 4 is a leaf spring with one end connected to the convex portion 2a and the other end to the convex portion 3a.
The upper mass body 2 and the lower mass body 3 are connected with each other by screws.

A piezoelectric element or an electromagnetic type vibration device (not shown) serving as a driving source is attached to the leaf spring 4 or the lower IT mass 3.

In such a configuration, when the vibration device is driven, the lower mass body 3 and the upper mass body 2 vibrate via the leaf spring 4, vibrating the component container 1, and causing the components stored in the component container 1 to vibrate. It is moved along the track of the parts container 1. In this case, the vibration is caused by the convex portion 2a of the upper mass body 2 at the upper end of the leaf spring 4.
The part fixed with a screw to vibrates in the direction of arrow A-A', and the component container 1 vibrates in a mode in which rotational movement and vertical movement are combined.

Since a plurality of leaf springs 4 are arranged on the circumference of the upper mass body 2 and the lower mass body 3, a single leaf spring 4 vibrates in a linear direction, but the upper mass as a whole The body 2 and the parts container 1 are moved in the rotational direction.

The vibration in this case is a single vibration system formed by a set of a plurality of leaf springs 4, an upper mass body 2, and a lower mass body 3, and even if there are multiple leaf springs 4, they all have the same phase. Since it operates as follows, it can be thought of as operating as a single leaf spring.

This vibration also oscillates in an inclined, almost linear range as shown by the arrow A-A'.Moreover, if this vibration mode is a sine wave, it is difficult to obtain sufficient advancement of the part, but due to the attraction force of the electromagnet. A vibrating device using a driving type vibrating electromagnet or the like is configured to change the speed of the vibration between the forward and backward paths to obtain more forward movement.

However, even with the excitation method of the excitation electromagnet, if the vibration is applied at a frequency near the resonance point, the vibration mode will become extremely similar to a sine wave as a result, making it difficult to obtain much forward movement. Therefore, it is necessary to excite at a frequency that is far off the resonance point, resulting in a large amount of energy being required to obtain the necessary amplitude.

In addition, when using a piezoelectric element as a driving source, it is a good idea to vibrate at a resonant frequency, so a large amount of energy is not required.
The efficiency of moving parts was poor.

The present invention was made in an attempt to eliminate the drawbacks of the prior art as described above, and in order to excite at a frequency near the resonance point and to minimize the excitation energy, two different It is an object of the present invention to provide a vibrating component supply device that can efficiently move components by combining directional vibrations to give vibrations in a so-called Lissajous waveform (i.e., Lissajous vibrations).

An embodiment of the present invention will be described in detail below with reference to the drawings in which corresponding parts are denoted by the same reference numerals.

In Fig. 3, reference numeral 11 is an inverted truncated cone-shaped parts container for storing and moving parts, and a part feeding path called a track is provided inside, and the parts are moved by vibration of the whole. They are arranged in a track and sent out in a predetermined direction.

Reference numeral 12 denotes an upper mass body in the shape of a disk (or a square plate), on which the parts container 11 is removably attached, and on the lower surface there are three or 90°
A pair of prismatic protrusions 12a having predetermined different heights, spaced apart from each other by a predetermined interval, such as four protrusions 12a;
12b are provided respectively.

Reference numeral 13 denotes a disk-shaped (or rectangular plate-shaped) lower mass body, and a prismatic convex portion 13a is provided on the upper surface of the mass body in the vicinity of the center of the convex portions 12a, 12b.

Reference numeral 14 denotes a rectangular temporary spring of a predetermined size to which a prismatic mounting member 15 is fixed to one end, and the lower end in the long axis direction is screwed to the convex portion 13a, so that the spring 14 is fixed almost perpendicularly in the vertical direction. The lower mass body 13 and the leaf spring I4 form a lateral vibration system.

Reference numeral 16 denotes a rectangular leaf spring, which has greater springiness than the leaf spring 14. Its upper end is screwed to the lower end surface of the projection 12a, and its lower end is screwed to the lower end surface of the projection 12b. It is screwed on. There is a mounting member 1 near the center of the
5 is fixed with screws, and thus the upper mass body 12 and the leaf spring 16 form a vertical vibration system. here,
The convex portions 12a and 12b are selected to have different heights (
In this embodiment, the protrusion 12b is higher than the protrusion 12a), so that the leaf spring 16 is coupled obliquely to the leaf spring 14.

A pair of piezoelectric elements 17 are attached as driving sources to both sides of the leaf spring 14, and each is driven by an external power source (not shown) via a lead wire 18.

In this case, it goes without saying that the piezoelectric element 17 only needs to be provided on one side.

Here, the lateral direction includes cases where there is a slight inclination from the horizontal. In addition, cases in the vertical direction also include cases in which there is a slight inclination from the vertical direction.

Next, the operation will be explained. Piezoelectric element 1 via lead wire 18
When a driving voltage is applied to 7, the leaf spring 14 is excited in the lateral direction, and the vibration is transmitted to the leaf spring 16.
is excited in the vertical direction following the vibration of the leaf spring 14, and as a result, the upper 'ff1 body 12 and the component container 11 are excited to rotate and vibrate vertically.

Since the leaf spring 16 is tilted downward to the right from the horizontal at a predetermined angle, the period delay of the vertical vibration with respect to the horizontal vibration of the leaf spring 14 is to the right, and the front peripheral part of the component container 11 is tilted to the right. When viewed from a distance, it has an elongated oval shape (as shown by arrow B).
The parts vibrate in a Lissajous figure shape), and the advancing direction of the parts is counterclockwise when looking at the parts container 11 from above.

On the other hand, unlike the case in FIG. 3, if the leaf spring 16 is tilted upward to the right, the period delay of the vertical vibration with respect to the horizontal vibration of the leaf spring 14 will be to the left, and the forward direction of the component will be The direction is clockwise.

By creating a phase difference between the two vibration systems in this manner, the horizontal vibration system including the leaf spring 14 can be used at a frequency near the resonance point.

In other words, in the case of FIG. 3, by vibrating the leaf spring 14 at the resonant frequency, the leaf spring 16 is excited in the vertical direction, but since the leaf spring 16 has greater springiness than the leaf spring 14, the vertical vibration is , deviates from the resonant frequency, so the amplitude of the vertical vibration is significantly smaller than the amplitude of the lateral vibration.

Incidentally, if a member that vibrates in the vertical direction is not provided as in the case of FIG. However, by avoiding the resonance frequency as in the case of Figure 3, the amplitude of the vertical vibration can be moderately suppressed, thus preventing the jump phenomenon. Able to effectively solve problems that arise.

FIG. 4 shows a second embodiment, in which a disc-shaped upper mass body 62 has a parts container 11 mounted on its upper surface, and a predetermined interval on the circumference of a predetermined radius on its lower surface. A plurality of pairs of prismatic protrusions 62a and 62b each having a predetermined different height are provided.

The disk-shaped lower mass body 63 has a pair of convex portions 62a on its upper surface.
, 62b are provided with prismatic protrusions 63b.

In this case, the leaf spring 14 has a mounting member 65 fixed to its upper end,
The lower end portion is fixed to the convex portion 63a with a screw. 66 is a rectangular leaf spring, consisting of three parts of approximately equal length in the long axis direction, the left end of which is higher than the center part,
The right end portion is lower than the center portion, the left and right end portions are fixed to the lower surfaces of the convex portions 62a and 62b, respectively, with screws, and the center portion is fixed to the mounting member 65 with screws.

In the configuration of FIG. 4, the piezoelectric element 17 causes the leaf spring 1 to
4 vibrates, the vibration is transmitted to the leaf spring 66, thereby exciting the upper mass body 62 and the parts container 11, thereby moving the parts stored in the parts container 11. In this case, the leaf spring 66 is considered to vibrate in the same direction as the leaf spring drawn by connecting the points screwed to the protrusions 62a and 62b with a straight line in the same manner as described above with reference to FIG.

With this configuration, it is possible to obtain the same effect as in the case shown in FIG. Become.

FIG. 5 shows the embodiment shown in FIG. 3, in which a disc-shaped upper mass body 52 has a component container 11 mounted on its upper surface, and a predetermined interval on a circumference of a predetermined radius on its lower surface. A plurality of a pair of prismatic convex portions 52a and 52b having the same predetermined height are provided.

The disk-shaped lower mass body 53 has a pair of convex portions 52 at its upper end.
A prismatic convex portion 53a having an inclined surface 53a+ is provided so as to correspond to the angles a and 52b. A mounting portion 55 is fixed to the upper end of the leaf spring 14, and the lower end is screwed onto the inclined surface 53a of the convex portion 53a. The leaf spring 16 has its both ends screwed to the lower end surfaces of the convex portions 52a and 52b, respectively, and its central portion near the center portion is screwed to the mounting portion 55.

Thus, by extending the leaf spring 14 diagonally upward so as to be oblique to the temporary spring 16 extending in the horizontal direction,
In addition to forming a lateral vibration system, the leaf spring 16 also forms a vertical vibration system.

In the configuration shown in FIG. 5, the leaf spring 1 is
4 is transmitted to the leaf spring 16, the upper mass body 52 and the parts container 11 are excited, thereby moving the parts stored in the parts container 11. In this case as well, a phase difference occurs between the horizontal vibration system and the vertical vibration system, and the component can be moved in the rotational direction determined by the inclination direction of the leaf spring 14.

According to the embodiment shown in FIG. 5, it is possible to obtain the same effect as described above in connection with FIG. Therefore, processing becomes much easier.

As described above, according to the present invention, the component container is excited by the second plate spring coupled to the first slope spring excited by the vibration drive source, so that the lateral vibration system is uniquely The parts container can be vibrated efficiently with a period synchronized with the frequency of vibration, and the parts container can be caused to vibrate by Lissajous by causing the vertical vibration system to vibrate with a predetermined phase difference with respect to the lateral vibration phase. It is possible to easily realize a vibrating component feeding device that can perform the following functions.

[Brief explanation of the drawing]

1 and 2 are a partially cutaway perspective view and a front view showing a conventional vibrating component supply device, FIG. 3 is a front view showing an embodiment of the vibrating component supply device according to the present invention, and FIG. 4 and fifth
The figure is a front view showing another embodiment of the present invention. ■, 11... Parts container, 2.12.52.62
...... Upper mass body, 3.13.53.63...
...lower f-mer, 4.14.16.66...
Leaf spring, 17...Piezoelectric element. Figure 1

Claims (1)

[Claims] An upper mass body and a lower mass body arranged vertically opposite each other, a parts container mounted on the upper surface of the upper mass body, and one end connected to the lower mass body to form a driving source. a rectangular first leaf spring to which a piezoelectric element is attached and forms a first vibration system together with the lower mass; and a first leaf spring connected between the upper mass and the first leaf spring; a second leaf spring having a large spring property and forming a second vibration system that follows the first vibration system together with the upper mass body, the first leaf spring having its long axis in the vertical direction. Alternatively, the second leaf spring is arranged so as to extend obliquely upward, and the second leaf spring is arranged so that its long axis is obliquely intersecting the long axis of the first leaf spring, and the second leaf spring A vibrating component supply device, wherein both ends in the longitudinal direction are fixed to the lower surface of the upper mass body, and the central part in the longitudinal direction is fixed to the upper end of the first leaf spring.