JPH11227926A - Drive control device of elliptic vibration parts feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive control device of elliptic vibration parts feeder which can obtain a desired elliptic vibration in simple circuit constitution. SOLUTION: A phase difference is given to the vibration displacement in the horizontal direction, and the vibration displacement in the vertical direction, of a bowl. A variable frequency power source 44; a phase regulator 45; a phase difference detector 46 to detect the phase difference between a horizontal vibration displacement and a vertical vibration displacement, and a phase difference setter 47 to set the phase difference between both the horizontal and vertical vibration displacements to a prescribed value, are provided. The variable frequency power source 44 is connected to one side of a vertical excitation source and a horizontal excitation source, and the phase difference regulator 45, while the phase difference regulator 45 is connected to the other side of the horizontal excitation source and the horizontal excitation source. By regulating the variable frequency power source 44, an output frequency to make the vibration displacement of the bowl by one side the maximum is set, and the output of the phase difference detector 46 and the output of the phase difference setter 47 at that time are compared, and the phase difference regulator 45 is regulated to make both outputs coincide with each other, so as to drive the other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drive control device for an elliptical vibration parts feeder.

[0002]

2. Description of the Related Art In FIG. 4, an elliptical vibration parts feeder, which is an elliptical vibration device, is indicated as a whole by 1 and includes a bowl 2 for performing elliptical vibration. A spiral track is formed on the inner peripheral surface of the bowl 2, and a wiper is provided at an appropriate position on the downstream side. This wiper is already well-known and its illustration is omitted, but the wiper is formed by bending a flat plate, and the distance between the lower end of the wiper and the transport surface of the truck is larger than the thickness of the component m (to be flat) to be fed. It is smaller than this double. At the discharge end of the truck, a posture holding means is provided, through which a component having a desired posture (for example, a component m having a long side directed in the transfer direction) is supplied to a linear vibration feeder (not shown).

[0005] The bowl 2 is fixed to a cross-shaped upper movable frame 7 shown in FIG. 5, and a cross-shaped lower movable frame 8 also shown in FIG. 6 stands upright on the upper movable frame 7. They are connected by four sets of leaf springs 9. That is, the four ends 7a of the upper movable frame 7
The upper end of the leaf spring 9 is fixed by bolts, and the lower end of the leaf spring 9 is fixed to four ends 8 a of the lower movable frame 8 by bolts. The ends 7a, 8a
Are vertically aligned.

On the lower surface of the upper movable frame 7, horizontal movable cores 16a, 1b are opposed to the horizontal drive electromagnets 14a, 14b.
6b is fixed. Further, a vertical movable core 13 is fixed to a central portion of the lower surface of the upper movable frame 7,
A vertical drive electromagnet 11 is fixed to the center of the fixed frame 10 in opposition thereto. In the figure, 12
Is a coil wound around the vertical drive electromagnet 11. Further, a pair of horizontal drive electromagnets 14a and 14b are fixed to opposite side wall portions of the fixed frame 10 with the vertical drive electromagnet 11 interposed therebetween.
4b are wound with coils 15a and 15b, respectively.

[0005] The fixed frame 10 is integrally formed with four legs 17, and these legs 17 are attached to the vibration isolating rubber 18.
Supported on the base via The leg portion 17 is formed integrally with a spring mounting portion 17a extending in the lateral direction. As shown in FIG. 6, the spring mounting portion 17a is provided with four sets of leaf springs 19 for vertical driving at both ends, as shown in FIG. It is fixed by bolts. The overlapping leaf springs 19 are overlapped with a spacer 20 interposed therebetween as shown in the figure, and their central portions are fixed to the lower movable frame 8 by bolts.

In the above configuration, the horizontal drive electromagnet 14
Reference numerals a and 14b denote first vibration drive sources for generating a horizontal excitation force, and the first vibration system driven by the first vibration drive source includes a bowl 2, a leaf spring 9, and horizontal movable cores 16a and 16b.
Etc. That is, when current is supplied, the horizontal drive electromagnets 14a and 14b generate a magnetic attraction force, whereby the horizontal movable cores 16a and 16b are attracted, and the restoring force of the overlapping leaf spring 9 pulled at this time. ,
The upper movable frame 7 vibrates in the horizontal direction. The vertical drive electromagnet 11 is a second vibration drive source that generates a vertical excitation force, and the second vibration system driven by the second drive system is composed of the bowl 2, the leaf spring 19, the vertical movable core 13, and the like. Become. That is, the vertical drive electromagnet 11 generates a magnetic attraction force by the supplied current, the vertical movable core 13 of the upper movable frame 7 is attracted, and at this time, the lower movable frame 8 (which is (Attached via upper movable frame 7 and leaf spring 9)
Is pulled downward, and the restoring force of the overlapping leaf spring 19 causes the upper movable frame 7 to
Vibrates vertically. That is, the upper movable frame 7 and the bowl 2 integrally formed with the upper movable frame 7 are caused to perform an elliptical vibration by vibrating the horizontal direction and the vertical direction independently and giving a phase difference between the vibrations. I have.

However, in the above vibrating parts feeder, the phase difference between the vertical exciting force and the horizontal exciting force is set to, for example, a constant 60 degrees, thereby causing the elliptical vibration.
Although it can be transferred at a higher transfer speed than linear vibration, the phase difference is constant, so that only elliptical vibration with a constant long axis and short axis length can be obtained, and the parts are aligned. In some embodiments, parts may be easily clogged by the alignment means.

However, Japanese Patent Publication No. 63-13892 discloses that "an elliptical feeder is different from a general vibratory feeder to adjust the transfer speed on the trough, and it is necessary to control both horizontal and vertical vibrations. The operation is troublesome and takes a long time to adjust.In this type of vibration feeder, open-loop control has been used conventionally, but it takes time to control both horizontal and vertical vibration excitation devices. In order to solve this problem, a "trough was set to vibrate a ball-shaped or straight trough independently in each of the horizontal and vertical directions. A vibrating device such as an elastic body such as a leaf spring for receiving horizontal vibration and an electromagnet and a vibrating device for an elastic body such as a leaf spring and a magnet for receiving vertical vibration are provided between the portion and the base portion. Elliptical vibration type filter In Da, horizontal vibration Fuhaba setter 3
4 is compared with the output of the horizontal vibration amplitude detection sensor 38,
The deviation is determined, and the horizontal vibration amplitude deviation is determined by the horizontal vibration controller 32.
After the amplitude is adjusted and adjusted via the horizontal vibration exciter 30, the horizontal vibration amplitude control system for controlling the horizontal vibration amplitude to a set command value, and the command from the vertical vibration amplitude setter 35 and the vertical The output is compared with the output of the vibration amplitude detection sensor 39, the deviation is determined, and the vertical vibration amplitude deviation is increased and adjusted via the vertical vibration adjuster 33, and then applied to the vertical vibration exciter 31 to obtain the vertical vibration amplitude. A vertical vibration amplitude control system for controlling to a set command value, and receives the input of the vertical vibration amplitude setting device 35 from the output of the horizontal vibration amplitude setting device 34 and outputs the vertical vibration amplitude command to the horizontal vibration amplitude. An elliptical vibration type feeder control device characterized by a fixed ratio according to the type of work specified by the command was developed earlier. Although this is clear from FIG. 7, it is considered that a commercial frequency power supply is used even though it is not specified in the specification. Further, as described above, the vertical vibration exciter 31 is controlled so as to obtain a vertical vibration amplitude having a predetermined ratio with respect to the horizontal vibration amplitude.

However, with this apparatus, it is impossible to change the inclination and the direction of rotation of the elliptical vibration which has a great influence on the movement and the transfer speed of the parts.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is possible to freely change the inclination and the direction of rotation of an elliptical vibration according to the type of a part or a desired transfer speed. An object of the present invention is to provide a drive control device for an elliptical vibration parts feeder that can perform the following.

[0011]

SUMMARY OF THE INVENTION The above objects are achieved by a vertical vibration source, a horizontal vibration source, a spiral track formed on an inner peripheral wall, and a bowl for feeding and supplying parts. A horizontal vibration spring for supporting the bowl so as to vibrate in the horizontal direction, a vertical vibration spring for supporting the bowl so as to vibrate in the vertical direction, and detecting a horizontal vibration displacement of the bowl; A horizontal vibration sensor, and a vertical sensor for detecting a vertical vibration displacement of the bowl, comprising a phase difference between the horizontal vibration displacement and the vertical vibration displacement of the bowl, In the drive control device of the elliptical vibration part feeder configured to cause the bowl to perform elliptical vibration, a variable frequency power supply, a phase adjuster, the outputs of the horizontal vibration sensor and the vertical vibration sensor, A phase difference detector for detecting a phase difference between a dynamic displacement and the vertical vibration displacement, and a phase difference setting device for setting a phase difference between the horizontal vibration displacement and the vertical vibration displacement to a predetermined value, wherein the variable frequency A power supply is connected to one of the vertical vibration source and the horizontal vibration source and the phase difference adjuster, and the phase difference adjuster is connected to the vertical vibration source and the horizontal vibration source. By connecting to the other side, by adjusting the variable frequency power supply, an output frequency at which the vibration displacement of the bowl by one side is maximized is set, and the output of the phase difference detector and the output of the phase difference setter at this time are set. And a drive control device for an elliptical vibration parts feeder, characterized in that the phase difference adjuster is adjusted so that these outputs match, and the other is driven by the adjusted output. Will be resolved.

[0012]

FIG. 1 shows a drive control circuit for an elliptical vibration parts feeder according to an embodiment of the present invention. Setting device 41a, horizontal vibration amplitude controller 42
a, a horizontal vibration excitation device 43a,
The vertical vibration side includes a vertical vibration amplitude setting device 41b, a vertical vibration amplitude adjuster 42b, and a vertical vibration excitation device 43b.

The horizontal vibration exciter 43a and the vertical vibration exciter 43b correspond to the horizontal drive electromagnets 14a and 14b and the vertical drive electromagnet 11 in the above-mentioned elliptical vibration part feeder, respectively. Although not shown in the above-mentioned elliptical vibration parts feeder, the horizontal vibration sensor 48a is supported by a stationary body in the vicinity of the horizontal vibration leaf spring 9, and the vertical vibration sensor 48b is a vertical vibration leaf spring. 14 is supported in the vicinity. Further, according to the embodiment of the present invention, the phase difference detector 46 that receives the outputs of the horizontal vibration sensor 48a and the vertical vibration sensor 48b is provided, and the phase difference detection output is supplied to the comparator 52. . The output of the phase difference setting device 47 is supplied to the other input terminal of the comparator 52. For this, for example, a preferable phase difference β between the horizontal vibration displacement and the vertical vibration displacement is set. The output of the comparator 52 is set in a phase difference adjuster 45, to which the output of an excitation frequency power supply, for example, a variable frequency power supply 44, is supplied. The phase difference α of the voltage supplied to 43b is determined.

The embodiment of the present invention is configured as described above. Next, its operation will be described.

In the present embodiment, the above-mentioned vibrating parts feeder 1 is applied. A variable frequency power supply 44 is used as a power supply for driving this, the frequency of which can be adjusted. This adjustment output is directly supplied to the horizontal vibration excitation device 43a, and the phase difference adjustment is supplied to the vertical vibration excitation device 43b. Table 45
And with a phase difference α. First, when the driving of the elliptical vibration parts feeder 1 is started, the horizontal vibration of the bowl 2 is controlled by adjusting the variable frequency power supply 44.
That is, while measuring the output of the horizontal vibration sensor 48a,
The output frequency of the variable frequency power supply 44 is swept, and the output of the variable frequency power supply 44 is fixed at a frequency at which the horizontal vibration amplitude is maximized.

In this steady operation, the horizontal vibration amplitude is set to a predetermined amplitude by the horizontal vibration amplitude setting device 41a. The comparator 50 and the horizontal vibration amplitude adjuster are set to match the predetermined amplitude. 42a.
That is, the output of the horizontal vibration sensor 48a is supplied to the comparator 50, where it is compared with the output of the horizontal vibration amplitude setting device 41a. The horizontal vibration amplitude adjuster 42a is adjusted so that this coincides, and this output is output to the horizontal vibration excitation device 4a.
3a, that is, the voltage is applied to the coils of the horizontal drive electromagnets 14a and 14b. On the other hand, the vertical vibration displacement is detected by the vertical vibration sensor 48b, and its output is supplied to one input terminal of the comparator 51, and the other input terminal is supplied with the output of the vertical vibration amplitude adjuster 41b. Since the horizontal vibration system is in a resonance state by the sweep of the variable frequency power supply 44 as described above, the phase difference between the horizontal vibration displacement and the current flowing through the coil of the horizontal vibration excitation device 43a is about 90 degrees. It has become. However, the vertical vibration system performs forced vibration, and the phase difference between the vertical vibration displacement detected by the vertical vibration sensor 48b and the current flowing through the coil of the vertical vibration excitation device 43b is considerably apart from 90 degrees. . Accordingly, the phase difference detected by the phase difference detector 46 is not 0 degree but has a certain phase difference, which is supplied to one input terminal of the comparator 52 and the other input terminal is provided with the phase difference of the phase difference setting device 47. β is supplied.
If they are compared and do not match, the phase difference adjuster 4
In 5, the output phase of the variable frequency power supply 44 is adjusted,
Change α. This changes the phase of the current flowing through the coil of the vertical vibration excitation device 43b. Although the phase of the vertical vibration displacement depends on how far the resonance frequency of the mechanical vibration system is apart from the drive frequency at this time, and also on the viscosity coefficient, the phase difference of the vertical vibration sensor 48b changes. The phase difference detection value of the phase difference detector 46 is adjusted so as to coincide with β.

According to the embodiment of the present invention,
Horizontal vibration amplitude setting device 41a and vertical vibration amplitude setting device 41b
, A desired amplitude is set, which is supplied to one input terminal of the comparators 50 and 51, and the other input terminal is supplied with the output of the horizontal vibration sensor 48a and the output of the vertical vibration sensor 48b, respectively. . The horizontal vibration amplitude adjuster 42a and the vertical vibration amplitude adjuster 42b are adjusted so that the difference becomes zero, and the horizontal vibration amplitude adjuster 42a and the vertical vibration amplitude adjuster 42b.
The current flowing through the coil 3b is adjusted. Thus, the bowl performs an elliptical vibration with a predetermined horizontal amplitude and vertical amplitude.

According to the embodiment of the present invention, a desired elliptical vibration can be performed by adjusting the phase difference setting device 47. That is, if the phase difference φ is 0 degree in FIGS. 2 and 3, linear vibration is performed as indicated by A. At this time, the horizontal amplitude is b and the vertical amplitude is a. The same applies hereinafter. Further, when the phase difference φ is adjusted so as to be between 0 degree and 90 degrees, an elliptical vibration is performed as shown in B, but the flatness is considerably large. Phase difference φ is 90
In other words, an elliptical vibration with the major axis horizontal is performed. Further, when the phase difference is changed from 90 degrees to 180 degrees, flat elliptical vibration similar to B is performed, but the rotation direction of the elliptical vibration is reversed.

If the phase difference φ = 180 degrees as shown in FIG. 3, a linear vibration is performed as shown by A, which is a linear vibration in the direction opposite to A in FIG. Further, the phase difference φ is set to 180
If it is adjusted to a certain value between 270 degrees and 270 degrees, a flat elliptical vibration is performed as shown by B. Further, at φ = 270 degrees,
If an elliptical vibration with the major axis horizontal as in FIG. 2C is performed, and if the phase difference is set to a certain value from 270 degrees to 360 degrees, flat elliptical vibration is performed. This is the opposite of the direction of rotation from FIG. 3B.

As described above, according to the embodiment of the present invention, each of the elliptical vibration modes as shown by A to D in FIGS. 2 and 3 is performed by the phase difference setting unit 47. Is detected by the part feeding means in the bowl and is changed from the elliptical vibration mode as shown in FIG. 3D to the elliptical vibration mode as shown by D. As a result, the transfer speed of the parts is reversed, and the parts entangled in the parts feeding means are all cleared at once.

Also in this embodiment, the ratio between the horizontal vibration amplitude and the vertical vibration amplitude can be changed as in the conventional example. That is, if the horizontal vibration amplitude b and the vertical vibration amplitude a are reversed, the elliptical vibration mode as shown in FIGS. 2 and 3 is rotated by 90 degrees. In such a vibration mode, the acceleration in the vertical direction becomes large, and it is possible to minimize the phenomenon that is easily entangled with some kind of part feeding means. Can be.

Although the embodiment of the present invention has been described above, the present invention is, of course, not limited to this, and various modifications can be made based on the technical idea of the present invention.

For example, in the above-described embodiment, the present invention is applied to the conventional elliptical vibration part feeder, but the present invention is not limited to this, and can be applied to other known elliptical vibration feeders.

In the above embodiment, the horizontal vibration exciter 43a and the vertical vibration exciter 43b are formed by electromagnets.
However, the present invention is not limited to this. For example, a piezoelectric element may be attached to a vertical leaf spring and a horizontal vertical leaf spring, and an AC voltage may be applied thereto to cause the leaf spring to perform a bending motion. . In this case, the phase difference between the voltage and the vibration displacement is 90 degrees in the resonance state.

In the above embodiment, the horizontal vibration amplitude setting device 41a and the vertical vibration amplitude setting device 41b are set so that the amplitude is set to a predetermined value. Can also be omitted.

In the above embodiment, a leaf spring is used as the horizontal vibration spring and the vertical vibration spring, but other spring means or rubber springs may be used instead.

[0027]

As described above, according to the drive control apparatus for an elliptical vibration parts feeder of the present invention, a desired simple elliptical vibration can be obtained with a simple circuit configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram of a drive control device of an elliptical vibration parts feeder according to an embodiment of the present invention.

FIG. 2 shows each elliptical vibration mode obtained by adjusting a phase difference setting unit 47 in FIG.

FIG. 3 shows an elliptical vibration mode similarly obtained.

FIG. 4 is a partially broken side view of a conventional elliptical vibration parts feeder.

5 is a sectional view taken along line [5]-[5] in FIG.

FIG. 6 is a bottom view of the same.

FIG. 7 is a block diagram of a conventional elliptical vibration drive control circuit applied to the elliptical vibration parts feeder.

[Explanation of symbols]

 43a Horizontal vibration exciter 43b Vertical vibration exciter 44 Variable frequency power supply 45 Phase adjuster 46 Phase difference detector 47 Phase difference setter 48a Horizontal vibration sensor 48b Vertical vibration sensor

Claims (3)

[Claims] 1. A vertical vibration source, a horizontal vibration source,
A bowl having a spiral track formed on an inner peripheral wall thereof for feeding and feeding parts, a horizontal vibration spring for supporting the bowl so as to vibrate in a horizontal direction, and vibrating the bowl in a vertical direction And a vertical vibration sensor for detecting a horizontal vibration displacement of the bowl, and a vertical sensor for detecting a vertical vibration displacement of the bowl. In the drive control device of the elliptical vibration parts feeder, which has a phase difference between the horizontal vibration displacement and the vertical vibration displacement to cause the bowl to perform elliptical vibration, a variable frequency power supply, a phase adjuster, A phase difference detector that receives outputs of the horizontal vibration sensor and the vertical vibration sensor and detects a phase difference between the horizontal vibration displacement and the vertical vibration displacement;
A phase difference setting device for setting a phase difference between the horizontal vibration displacement and the vertical vibration displacement to a predetermined value is provided, and the variable frequency power supply is provided with one of the vertical vibration source and the horizontal vibration source and the Connected to a phase difference adjuster, the phase difference adjuster connected to the other of the vertical vibration source and the horizontal vibration source, and by adjusting the variable frequency power supply, The output frequency at which the vibration displacement is maximized is set, the output of the phase difference detector at this time is compared with the output of the phase difference setter, and the phase difference adjuster is adjusted so that these outputs match. A drive control device for the elliptical vibration parts feeder, wherein the adjusted output is used to drive the other. 2. A horizontal vibration amplitude setting device and a vertical vibration amplitude setting device are provided, and their outputs are compared with the outputs of the horizontal vibration sensor and the vertical vibration sensor. A drive control device for an elliptical vibration parts feeder, wherein a direction excitation source and the vertical direction excitation source are controlled. 3. The vertical vibration source and the horizontal vibration source are electromagnets, respectively, and the horizontal vibration spring and the vertical vibration spring are arranged in a vertical direction and a horizontal direction, respectively. 3. The drive control device for an elliptical vibration parts feeder according to claim 1, wherein the drive control device is a leaf spring provided.