JPS583928B2 - Composite vibration transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses a compound motion of three or more diaphragms to reduce the acceleration value during backward sliding to zero or a fraction of the acceleration value during forward sliding of the transported object. The purpose of this device is to enable continuous transport of objects, and to perform feeding and sorting operations.
The purpose is to provide a composite vibration transport device that allows alignment work, has a simple mechanism, and is easy to maintain.

Conventionally, all of the above-mentioned vibration transport devices move the transport plate using a single linear, circular, or elliptical motion as the type of vibration.

As a method for improving this, by combining two simple vibrations, it is possible to transport objects differently than in the case of only a single vibration, and it is also possible to increase the transport speed.

However, since ideal transport conditions cannot be obtained by combining the two vibrations described above, the transport speed is not sufficiently improved.

By the way, ideal transportation conditions are such that the acceleration when an object slides forward is large and the acceleration when it slides backward is zero, and the acceleration characteristic curve of the transportation plate is a rectangular wave as shown in Figure 1. It is to become a state.

In such a case, the object only moves forward and does not move backward.

However, it is impossible to obtain such characteristics by synthesizing two simple harmonic motions as described above, and it is necessary to synthesize at least three or more vibrations.

Of course, if you synthesize three or more vibrations, you can obtain a more perfect acceleration characteristic like this, but
However, the disadvantage of creating an actual transport aircraft is that it would be quite large and expensive.

Therefore, a minimum of three vibrations are synthesized, but there are infinite ways to synthesize them.

Then, considering the feasibility, there is a slight deviation from the ideal state, and the second
Consider the acceleration characteristics of a rectangular waveform as shown in the figure.
When this is harmonically analyzed, a composite acceleration waveform as shown in FIG. 3 is obtained.

That is, the waveform of FIG. 3 can be said to be an approximate waveform of the waveform of FIG. 2.

Moreover, this is a form that can be realized as a transport aircraft.

In the above target range, each displacement and phase angle of the composite wave are determined as shown in the following equations.

Displacement The acceleration in this case is acceleration x--r'(A sin(ωt+φ1)+Bsin(2ω
t+φ2)+Csin(3ωt+φ3)}, and by plotting this by applying appropriate values to A, B, O, φ1, φ2, and φ3, a waveform as shown in FIG. 3 is obtained.

As described above, according to the present invention, a synthetic wave vibration close to the ideal can be obtained for the transport plate compared to the conventional single vibration or two-plate vibration.

The specific differences are shown by the waveforms in Figure 6. Figure 6A shows the behavior of an object on a transport plate that makes a single linear vibration, and Figure 6B shows the behavior of an object on a transport plate that combines two single linear vibrations. When a plate is used, FIG. 6C shows the behavior of an object on a transport plate that combines three single linear vibrations.

From these results, it can be seen that the backward slip in case of C is decreased, the forward slip is increased, and it has excellent transport properties.

The following example will be shown to implement the above theory as a transport aircraft.

As shown in FIG. 4 and FIG. 5, the embodiment device includes diaphragms 1, 2, .
3 to 4 pillars 1', 2', 3' each made of spring material.
The four diaphragms are supported at the four corners and assembled into three stages on the base 4, with the top diaphragm 1 serving as a transport plate and the lower diaphragms 2 and 3 serving as intermediate plates.

A crankshaft 5,
6.7 is attached, and the lower end is pivotally fixed to the eccentric position of the disc 8 which is supported by the diaphragms 2 and 3 and the base 4,
The rotation shafts 9 of each disc 8 are connected via a splined universal joint 10, and gears 11 and 6 each having 120 teeth are connected to the rotation shaft 9 of the upper diaphragm 1 at the end of each rotation shaft 9.
A gear 12 with 0 teeth and a gear 13 with 40 teeth are respectively attached, and although not shown, they are configured to be interlocked by a group of gears by one prime mover.

Each amplitude of this device is A=7.4mm B/4=1.6mm O/9=0.6
mm is applied by a crank mechanism, and the phase angle is applied by shifting the meshing position of the gears.

The phase angles are φ1=54°, φ2−18°, and φ3=−18°.

It is of course possible to apply vibration electrically based on this principle; for example, the same effect can be obtained by applying vibrations of various amplitudes using an electromagnetic method, or by applying a phase difference to the load current.

It is of course also possible to manufacture the transporter in a bowl-type manner.

As a result of transportation according to the above example, the following effects were observed.

Regarding the behavior of objects during transport, backward slipping almost disappears, while forward slipping increases significantly, resulting in extremely high transport speeds.Also, even objects with small friction coefficients can be transported efficiently, and transport speeds can be reduced due to differences in friction coefficients. The impact can also be reduced.

[Brief explanation of the drawing]

Fig. 1 is an ideal rectangular wave state diagram, Fig. 2 is a rectangular wave state diagram sought by this invention, Fig. 3 is a composite acceleration waveform diagram, and Fig. 4 is a diagram of the rectangular wave state desired by this invention.
5 and 5 show the device of the invention, the former being a front view;
The latter is a side view, and Figure 6 A, B, and 0 are reference waveform diagrams.
is the behavior of an object on a transport plate that performs linear simple harmonic motion, B is the behavior of an object on a transport plate that performs a composite motion of two-plate vibrations, and C is the behavior of an object on a transport plate that performs a composite motion of three-plate vibrations. These are enlarged views of each figure. 1 in the figure is a diaphragm (transport plate), 2 and 3 are diaphragms (
Intermediate plate), 1', 2', 3' are pillars, 4 is the base, 5, 6
．． 7 is a crankshaft, 8 is a disc, 9 is a rotating shaft, 10 is a splined universal joint A11, 12, and 13 are gears.

Claims (1)

[Scope of Claims] 1 Three vibration plates are assembled on a base in three stages with the four corners supported by four pillars each made of spring material, with the uppermost vibration plate serving as a transport plate and the lower vibration plate serving as a transportation plate. Two diaphragms are used as intermediate plates, and a crankshaft is attached to the back side of each diaphragm, and the lower end is a diaphragm. The rotating shaft of each disc is connected via a universal joint with a spline, and gears with the required number of teeth are attached to the end of each rotating shaft from the rotating shaft of the upper diaphragm, and these gear groups are connected by the prime mover. A composite vibration transport device characterized by interlocking. 2 The number of teeth of each gear attached to the rotation axis of each diaphragm lower than the rotation axis of the upper diaphragm is 120, 60, 4.
The composite vibration transport device according to claim 1, characterized in that the number of vibrations is 0.