JPH0253328B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibrating machine, for example a vibrating parts feeder.

[Conventional technology and its problems]

Recently, a vibrating parts feeder as shown in FIG. 5 has been developed. In other words, the driving method is unique, but in the figure, ball 1 and base 2
is a plurality of inclined first planes arranged at equal angular intervals.
They are connected by an elastic plate 4 and a second elastic plate 6, and each first elastic plate 4 has piezoelectric elements 5a on both sides.
5b is attached. The base 2 is supported on the floor by anti-vibration rubber 3.

When AC voltage V is applied to the piezoelectric elements 5a and 5b, bending vibration is generated in the first elastic plate 4, which is transmitted to the ball 1 via the second elastic plate 6, and the ball 1 performs torsional vibration or rotational vibration. . The second elastic plate 6 has a sufficiently smaller spring constant than the first elastic plate 4, and serves to prevent large torsion from occurring in the piezoelectric element attached to the first elastic plate 4 and to increase the swing width of the ball 1. However, the presence of this member 6 increases the height H of the entire vibrating parts feeder.

In modern factory equipment, various devices are arranged around the vibrating parts feeder, and it is desirable that the height H of the vibrating parts feeder is as small as possible in view of the arrangement with these devices.

Further, if the size of the ball 1 changes, a piezoelectric element with a large capacity must be used to generate the necessary driving force, but the disassembly and assembly work for this is troublesome.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a rotary vibrator in which the height of the entire vibrator can be reduced and the vibration generating section can be made into a unit.

[Means for solving the problem] The above object is to connect a first mass body and a second mass body by a plurality of plate springs extending substantially horizontally so that the first mass body can vibrate in the vertical direction. , the second mass body and the third mass body are coupled by an elastic means that extends in the vertical direction so that the third mass body can vibrate in a predetermined direction, and piezoelectric elements are attached to both sides of the leaf spring,
Applying an alternating current voltage to these to cause the first mass body to vibrate in the vertical direction due to their expansion and contraction, and transmit the vibration force to the third mass body via the second mass body and the elastic means, This is achieved by a vibrator characterized in that the third mass body is made to vibrate in the predetermined direction.

[Effect]

When an alternating current voltage is applied to each piezoelectric element, bending vibration occurs in each leaf spring, and since these leaf springs are arranged substantially horizontally, the first mass body vibrates substantially in the vertical direction. This vibration force is transmitted to the second mass body via the second mass body and the elastic means, and the second mass body vibrates in a predetermined direction.

The second mass body and the third mass body are coupled only by elastic means extending in the vertical direction, and the first mass body can be disposed in the space between the second mass body and the third mass body.
The height of the entire vibrator can be reduced.

〔Example〕

First, a vibrating parts feeder according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

In the figure, a ball 10 is formed with a spiral track 10a in a known manner, along which the parts are transported. Ball 10 is base 11
and a plurality of inclined leaf springs 12 arranged at equal angular intervals.
combined by. The base 11 is supported on the floor by anti-vibration rubber 13.

A driving mass body 14 having a planar shape as shown in FIG. 2 is disposed between the ball 10 and the base 11.
This is connected to a mounting portion 11a integral with the base 11 by plate springs 15 arranged substantially horizontally and at equal angular intervals. A piezoelectric element 1 is mounted on both sides of each leaf spring 15.
6a and 16b are attached, and an alternating current voltage is applied to them even though they are not shown.

The first embodiment of the present invention is constructed as described above, and from a vibrational point of view, a vibration system as shown in FIG. 4 is constructed.

In other words, it is a three-mass system with masses m ₁ , m ₂ , m ₃
correspond to the ball 10, base 11 and driving mass 14 described above, respectively. In addition, springs k ₁ , k ₂ , and k ₃ are leaf spring 12, leaf spring 15, and vibration isolating rubber 1, respectively.
Corresponds to 3. When an alternating current voltage is applied to the piezoelectric elements 16a and 16b, bending vibration occurs in the leaf spring 15, and this vibration force can be made to correspond to the excitation force F generated between the masses m ₂ and the masses m ₃ . From the equation of motion of such a system, each mass m _{1 ,} m ₂ , m ₃ spring k ₁ , k ₂ , The spring constant of k ₃ (the spring constant of the anti-vibration spring 13 is sufficiently smaller than the spring constants of other springs, so it can be ignored and set to zero) is determined.

When an AC voltage is applied to each piezoelectric element 16a, 16b, the driving mass body 14 moves to the first
Vibration is performed in the vertical direction as shown by the arrows in the figure. This vibration force is transmitted to the ball 10 via the base 11 and the leaf spring 12, and the ball 10 performs rotational vibration or torsional vibration in the direction shown by the arrow. Although not shown, the parts on the track 10a are transported along the track 10a by this vibration.

The configuration and operation of this embodiment have been described above, and this embodiment has the following effects.

That is, in this embodiment, unlike the conventional example shown in FIG. 5, the auxiliary leaf spring 6 is not coupled to the leaf spring 12 extending in the vertical direction, so that the height of the entire vibrating parts feeder can be made smaller.

Moreover, piezoelectric elements 16a and 16b as driving sources
Since the leaf spring 15 to which this is attached is arranged horizontally, the space between the ball 10 and the base 11 can be effectively utilized, and the ball can be made into a unit with just these. That is, when changing the ball 10, it is sufficient to loosen and tighten only the bolt at the upper end of the leaf spring 12. Alternatively, the ball 10 may be left attached and only the piezoelectric elements 16a, 16b and the leaf spring 15 to which they are attached may be changed in order to change the driving ability. In this case, it goes without saying that the drive mass body 14 may also be considered as a drive unit.

Next, a linear vibration feeder according to a second embodiment of the present invention will be described with reference to FIG.

In the figure, the trough 20 is formed with a straight track in a known manner, along which the material or parts are transported. Truck 20 is base 2
1 and a pair of front and rear inclined leaf springs 23. The base 21 is supported on the floor by anti-vibration rubber 31.

A drive mass 28 is disposed between the trough 20 and the base 21 and is connected by a pair of leaf springs 24 disposed in mounting portions 26, 27 integral with the base 21. A piezoelectric element 2 is provided on both sides of each leaf spring 24.
5a and 25b are attached, and an alternating current voltage is applied to them even though they are not shown.

Although the second embodiment of the present invention is constructed as described above, it has a vibration system as shown in FIG. 4, which is vibrationally similar to the first embodiment.

In other words, it is a three-mass system with masses m ₁ , m ₂ , m ₃
correspond to the trough 20, base 21 and drive mass 28 described above, respectively. Further, springs k ₁ , k ₂ , and k ₃ are leaf springs 23, leaf springs 24, and vibration isolating rubber 3, respectively.
Corresponds to 1. When an alternating current voltage is applied to the piezoelectric elements 25a and 25b, bending vibration occurs in the leaf spring 24, and this vibration force can be made to correspond to the excitation force F generated between the masses m ₂ and the masses m ₃ . From the equation of motion of such a system, each mass _{m 1 ,} m ₂ , m ₃ spring k ₁ , k ₂ , The spring constant of k ₃ (the spring constant of the anti-vibration spring 31 is sufficiently smaller than the spring constants of other springs, so it can be ignored and set to zero) is determined.

When an AC voltage is applied to each piezoelectric element 25a, 25b, the driving mass body 28 moves to the third position due to the expansion and contraction of these elements.
Vibration is performed in the vertical direction as shown by the arrows in the figure. This vibration force is transmitted to the trough 20 via the base 21 and the leaf spring 23, and the trough 20 performs linear vibration in the direction shown by the arrow. Trough 2 even if not shown
The parts on the track in the zero are transported along the track by this vibration.

The configuration and operation of this embodiment have been described above, and this embodiment also has the same effects as the first embodiment.

Although the embodiments of the present invention have been described above, the present invention is of course not limited thereto and can be modified in various ways.

For example, in the first embodiment described above, the piezoelectric element 16
Both ends of the leaf spring 15 to which a and 16b are attached are immediately fixed to the base 11 and the driving mass 14, but in some cases, one end of the leaf spring 15 and the base 11 or the driving mass may be fixed to the base 11 or the driving mass. A leaf spring corresponding to the auxiliary leaf spring 6 of the conventional example shown in FIG. 5 may be attached between the body 14 and the body 14.

Furthermore, although the so-called vibrating parts feeder and linear feeder have been described in the above embodiments, the present invention is also applicable to other vibrators, such as vibrating spiral elevators.

Further, in the above embodiments, the ball 10 or the trough 2
Although an inclined leaf spring is used to obtain vibration in a predetermined direction, instead of this, a coil spring or a rubber plate may be arranged to obtain vibration in a predetermined direction.

〔Effect of the invention〕

As described above, according to the vibrator of the present invention, the overall height can be made smaller than that of the conventional vibrator, and the vibrating drive section can be made into a unit.

[Brief explanation of the drawing]

FIG. 1 is a side view of a vibrating parts feeder according to a first embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the same,
FIG. 3 is a side view of a linear vibrating feeder according to a second embodiment of the present invention, FIG. 4 is a conceptual diagram showing the vibration system of the above embodiment, and FIG. 5 is a side view of a conventional vibrating parts feeder. In the figure, 12, 15, 23, 24...
Leaf spring, 14, 28... Drive mass body, 16a, 1
6b, 25a, 25b...piezoelectric elements.

Claims (1)

[Claims] 1 A first mass body and a second mass body are coupled by a plurality of plate springs extending substantially horizontally so that the first mass body can vibrate in the vertical direction, and the second mass body and the third mass body A third mass body is coupled by an elastic means extending vertically so as to be able to vibrate in a predetermined direction, piezoelectric elements are pasted on both sides of the leaf spring, and an alternating current voltage is applied to these to cause the third mass body to expand and contract. vibrating one mass body in the vertical direction and transmitting the vibration force to the third mass body via the second mass body and the elastic means to cause the third mass body to vibrate in the predetermined direction; A vibrating machine characterized by: