JP3494266B2 - Vibration feeder control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vibration feeder, and more particularly to a control device for a vibration feeder that applies vibrations to electronic parts to align them in shape and direction.

[0002]

2. Description of the Related Art A vibrating feeder supports a conveying path for a component called a ball by a spring or the like, and intermittently drives an electromagnet to vibrate the ball, thereby vibrating the component on the ball to change its shape and direction. It is configured to send out in line.

FIG. 5 is a block diagram showing a control circuit of a conventional vibrating feeder. In FIG. 5, an AC power supply 1 is applied to an AC / DC conversion circuit 2 to be converted into a DC voltage, and the DC voltage is applied to a DC / AC conversion circuit 3 to be converted into an AC voltage and supplied to an electromagnet 4. . The electromagnet 4 is intermittently driven by an alternating voltage to vibrate the ball 5.

On the other hand, the AC power supply 1 is also applied to the control power supply 6 to generate a DC voltage for driving the control circuit 10 and to the control circuit 10, and to the voltage detection circuit 11 included in the control circuit 10. Given. The voltage detection circuit 11 detects the fluctuation of the power supply voltage and supplies the detection output to the amplifier 13.

A frequency setting device 21 composed of a variable resistor is connected to the oscillator 12, and the oscillation frequency from the oscillator 12 is changed by adjusting the frequency setting device 21. The oscillation output of the oscillator 12 is given to the amplifier 13. The amplifier 13 includes a voltage setting device 22 including a variable resistor.
Is connected, and the amplifier 13 amplifies the oscillation output of the oscillator 12 so that the voltage is set by the voltage setter 22. Further, the amplifier 13 amplifies the oscillation output of the oscillator 12 to a constant value when the voltage detection circuit 11 detects a voltage fluctuation.

The output of the amplifier 13 is given to the comparator 14 and compared with the triangular wave generated from the triangular wave oscillator 15,
The comparison output is given to the gate drive circuit 16. An operation command is also given to the gate drive circuit 16. Further, the current supplied from the DC / AC conversion circuit 3 to the electromagnet 4 is detected by the current detection circuit 17, and when the overcurrent is supplied to the electromagnet 4, the overcurrent detection circuit 18 detects it. In response to the operation command, the gate drive circuit 16 supplies the output of the comparator 14 to the DC / AC conversion circuit 3 and supplies the AC voltage of the oscillation frequency defined by the oscillator 12 to the electromagnet 4. Vibrate. Also,
The gate drive circuit 16 stops the oscillation of the AC voltage from the DC / AC conversion circuit 3 when the overcurrent is detected by the overcurrent detection circuit 18.

[0007]

As a characteristic of the electromagnet 4 used in the conventional vibrating feeder shown in FIG. 5, when the frequency is lowered, the upper limit value of the applied voltage is also lowered, and when the voltage is applied beyond this upper limit value, The electromagnet 4 burns out. Therefore, when the frequency is lowered, an fV curve that lowers the upper limit of the voltage that can be set is required.

In the past, there was only one fV curve, and for safety reasons the voltage had to be set low relative to the frequency, and the characteristics of the vibration feeder could not be brought out sufficiently. Further, even if the fV curve could be adjusted, the adjustment by the variable resistor could not be done by a skilled operator. Further, when the component conveyed by the ball 5 is changed, it is necessary to adjust it to an optimum frequency for vibrating the component, and the variable resistor does not know the set value, so a skilled worker is required. Further, the frequency of vibration may change due to fatigue of the spring that supports the ball 5, and even in that case, the hand of a skilled worker is required. Further, the setting value of the variable resistor may change if touched carelessly.

Therefore, a main object of the present invention is to provide a control device for a vibration feeder in which a frequency can be set by a key operation and a frequency and a voltage can be digitally set without using a variable resistor. is there.

[0010]

The invention according to claim 1 is
Applying vibration to the part intermittently electromagnets, control of the vibrating feeder for feeding align the shape or direction of the part
It is a device , and the input key and the microcomputer
Wherein, in response to an input from the input keys, microcomputer
Parameter sets the value of either frequency-voltage characteristic
And, by providing the driving control means for driving giving its voltage to the electromagnet can be set to the optimum value of the frequency-to-voltage characteristic in accordance with the format of the electromagnet using a vibrating feeder. The invention according to claim 2 is a microcomputer.
The computer stores in advance the values of a plurality of frequency-voltage characteristics.
Including a memory for storing, depending on the input from the key input,
The value of the corresponding frequency-voltage characteristic is read from the memory and
Determine the pressure.

According to a third aspect of the present invention, there is provided a control device for a vibration feeder for intermittently applying an electromagnet to give vibration to a component, aligning the shape or direction of the component, and supplying the component. It comprises a memory for storing the value of the voltage characteristic in advance, a lock means for locking the input key, and a drive means for applying the voltage of the frequency read from the memory to the electromagnet to drive the electromagnet.

In the invention according to claim 4 , claims 1 to 3
The value of the frequency-voltage characteristic of any of the above is represented by a function obtained by adding an integer multiple of the fundamental frequency and the offset voltage value.

The invention according to claim 5 further includes voltage varying means for varying the voltage to an arbitrary value.

[0014]

1 is a block diagram showing an embodiment of the present invention. In FIG. 1, an AC power supply 1, an AC / DC conversion circuit 2, a DC / AC conversion circuit 3, and an electromagnet 4
The ball 5 is constructed in the same manner as in FIG. The operation panel 31 includes a display section and an operation section, and the display section is provided with a display device that displays the frequency and voltage values as digital values and displays the content of the error when an error occurs.
The operation unit is provided with an up / down key, and the frequency is adjusted by operating the up / down key. The operation panel 31 is the microprocessor 3
2 and the microprocessor 32 includes a memory 33. The memory 33 stores the fV curve in advance.

FIG. 2 is a diagram showing an example of the fV curve (value of frequency vs. voltage characteristic). In the memory 33 shown in FIG. 1, an fV curve as shown in FIG. 2 is digitally stored in the form of a functional expression. In the example shown in FIG. 2, 17 types of f-V are stored, but the f-V curve is expressed by a functional expression of V = af + Vb. However, the offset voltage is Vb
= Any value between -150 and 100 V is selected, the value of a is selected from any of 1 to 5, and the frequency setting range is 20.
≦ f ≦ 150 [Hz], and the output voltage range is 0 ≦ V ≦
It is set to 200 [V]. The voltage calculated by such an fV curve becomes the upper limit value. Within the range of this upper limit value, an arbitrary output voltage can be set by the output voltage setting unit 38 shown in FIG.

The control power supply 34 in FIG. 1 outputs a DC voltage for operating the control circuit and supplies it to the microprocessor 32 and the gate drive circuit 35. Voltage detection circuit 3
6 detects the fluctuation of the DC voltage and supplies the detected output to the microprocessor 32, and the current detection circuit 37 detects the current supplied from the DC / AC conversion circuit 3 to the electromagnet 4 and outputs the detected output to the microprocessor 32. Give to. Further, the microprocessor 32 is provided with an output voltage setting device 38 composed of a variable resistance, and the output voltage is set. This set value is set to A / by the microprocessor 32.
After D conversion, it is stored in the memory. An interface 39 is further connected to the microprocessor 32, and an operation command, a sensor input and a speed switching command are given to this interface 39. Further, an operation signal is given from the microprocessor 32 to the relay 40.

3 and 4 are flow charts for explaining the operation of the embodiment of the present invention.

Next, the specific operation of the embodiment of the present invention will be described with reference to FIGS. The microprocessor 32 determines whether or not the up / down key of the operation panel 31 has been operated.
Proceed to the main routine shown in. When the up / down key is operated, it is determined whether or not the panel is locked. Here, the panel lock is a state in which no key input is possible, that is, the operation panel 31 is locked and f-V is set.
It means that the characteristics cannot be changed. Operation panel 3
1 by providing a panel lock key. This can also be achieved by setting the lock mode softly. If it is in the panel lock state, it is determined whether or not the panel lock is changed. If the panel lock is not changed, the initial state is returned to.

When the panel lock state is released and the up / down key is operated, the microprocessor 32 reads the input of the up / down key and sets the frequency and voltage considering any of the fV characteristics shown in FIG. The data is updated by reading from the memory 33, and the frequency and voltage at that time are displayed on the display unit of the operation panel 31.

After updating the data, the microprocessor 32 proceeds to the main routine shown in FIG. 4 if there is no key input. In the main routine, the microprocessor 32 determines whether or not there is an error by self-diagnosis, and if there is an error, displays the content of the error on the display unit of the operation panel 31, and when the reset switch of the operation unit is operated, Reset. If there is no error, the microprocessor 32 determines whether or not there is an abnormal signal. The determination of the abnormal signal is made based on whether the voltage detection circuit detects a voltage shortage or whether the current detection circuit 37 detects an overcurrent. Microprocessor 32
Displays an error on the display unit of the operation panel 31 if there is an abnormal signal of overvoltage or overtemperature (inverter).

The microprocessor 32 reads the data if there is no abnormal signal. This data is the data updated by the operation of the up / down key of FIG. And
Based on the data, the microprocessor 32 is f-
The V-curve is calculated to determine whether or not the driving start condition is satisfied. Here, the operation start condition refers to whether or not various signals such as an external control signal, a speed switching signal read, an overflow, and a timer on are prepared. If the operating condition is satisfied, the microprocessor 32 sets the output data, then generates a pulse width modulation (PWM) function, and outputs the pulse width modulation data to the gate drive circuit 35. The gate drive circuit 35 causes the DC / AC conversion circuit 3 to generate a predetermined AC voltage. Then, the microprocessor 32 updates the data displayed on the display unit of the operation panel 31.

[0022]

As described above, according to the present invention , input
Includes a key and a microcomputer. Depending on the input from the input key , the microcomputer sets one of the frequency-voltage characteristic values, and that voltage is applied to the electromagnet.
Since the drive is given and driven, the optimum frequency-voltage characteristic value can be set according to the type of electromagnet used in the vibration feeder. In addition, the microcomputer is
Memory for pre-storing a number of frequency-voltage characteristic values
Including, and responding from the memory according to the input from the key input
Read the value of the frequency-voltage characteristic to determine the voltage.
The shape of the electromagnet used in the vibration feeder
You can set the optimum frequency-voltage characteristic value according to the equation.
It In addition, the value of the minimum setting unit can be adjusted one by one by key input, which enables delicate adjustment, and the frequency for driving the electromagnet can be optimized. Therefore, the vibration in the vibration feeder can be stabilized, the feeding speed of parts can be made constant, and even when different parts are conveyed, the optimum frequency for conveying the parts can be selected. Moreover, conventionally, the frequency is set by the variable resistor, and if the variable resistor is touched carelessly, the frequency has changed, but if the set value of the input key is stored in the memory, It is possible to prevent the frequency from changing even if the input key is operated carelessly. Furthermore, when analog signals are handled in the conventional analog system, it becomes difficult to distinguish them from noise, and when the signal voltage is increased, the problem of withstand voltage of the element arises. Higher accuracy is possible only by raising.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing an example of an fV curve.

FIG. 3 is a flow chart for explaining a key input operation according to the embodiment of the present invention.

FIG. 4 is a flowchart of a main routine of one embodiment of the present invention.

FIG. 5 is a block diagram showing a control circuit of a conventional vibrating feeder.

[Explanation of symbols]

1 AC power supply 2 AC / DC conversion circuit 3 DC / AC conversion circuit 4 electromagnet 5 balls 31 Operation panel 32 microprocessors 33 memory 34 Control power supply 35 Gate drive circuit 36 Voltage detection circuit 37 Current detection circuit 38 Output voltage setting device 39 Interface

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-14819 (JP, A) JP-A-62-262667 (JP, A) JP-A-56-121112 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B06B 1/04 B65G 27/24 H01F 7/14 H02M 7/62

Claims (5)

(57) [Claims] 1. A control device for <br/> vibrating feeder that conveys the parts by applying vibration to align the shape or direction of the <br/> component parts by the electromagnet, vibrating the electromagnet Relationship between input key for setting and inputting frequency and output voltage for vibrating the electromagnet
A function formula that generates multiple frequency-voltage characteristics
And the function formula according to the frequency input from the input key
The electromagnet is vibrated with the calculated voltage value as the upper limit value.
An output voltage setting means capable of setting the output voltage, and the frequency and voltage
Fine said output voltage control apparatus of the vibration feeder having a driving control means for the value of the frequency versus voltage characteristic for driving given to the electromagnet determined by. 2. A component is vibrated by an electromagnet,
Convey the parts by aligning the shapes or directions of the parts
A control device for a vibration feeder, which is an input key for setting and inputting a frequency for vibrating the electromagnet.
When the relationship between the frequency and the output voltage for vibrating the electromagnet pre
Memory for memorize a value of a plurality of frequency versus voltage characteristic defining fit
When the frequency of the value of the frequency versus voltage characteristic corresponding from the memory in accordance with the frequency input from the input key is read
The frequency-voltage characteristic is
The upper limit is the output voltage value on the slope of the
With the preset output voltage value as the upper limit value,
Output voltage that can be set or changed arbitrarily within the range
The setting means and the frequency and
And the frequency-to-voltage characteristic determined by the output voltage set arbitrarily above.
Control hand for driving by giving a sex value to the electromagnet
Vibratory feeder control device with steps . 3. A control device for <br/> vibrating feeder that conveys the parts by applying vibration to align the shape or direction of the <br/> component parts by the electromagnet, vibrating the electromagnet Use the input key to set and enter the frequency and the relationship between the frequency and the output voltage that vibrate the electromagnet.
Memory that stores the values of multiple frequency-voltage characteristics
And an output voltage setting for setting an output voltage for vibrating the electromagnet.
Setting means, the frequency input from the input key and the set output
Of the plurality of frequency-voltage characteristics according to the input voltage value.
Locking means for storing and locking the value of the frequency-voltage characteristic which is determined from the above, and the frequency and voltage characteristic values among the plurality of frequency-voltage characteristic values.
Fine said output voltage control apparatus of the vibration feeder having a driving control means for the value of the frequency versus voltage characteristic for driving given to the electromagnet determined by. 4. A component is vibrated by an electromagnet,
Convey the parts by aligning the shapes or directions of the parts
A control device for a vibration feeder, which is an input key for setting and inputting a frequency for vibrating the electromagnet.
And the relationship between the frequency and the output voltage that vibrates the electromagnet
Of a function that generates multiple frequency-voltage characteristics
Integer multiple of the fundamental frequency that can be fine-tuning of the output frequency to the inclination a
Out which is obtained by adding the offset voltage value to a value obtained by multiplying the frequency of
A memory for storing a functional expression for calculating the force voltage V and the functional expression according to the frequency input from the input key.
The electromagnet is vibrated with the calculated voltage value as the upper limit value.
An output voltage setting means capable of setting the output voltage, and the frequency and voltage
And the value of the frequency-voltage characteristic determined by the output voltage
A control device for a vibration feeder, which is provided with drive control means for giving a magnet to drive . 5. A component is vibrated by an electromagnet, and
Convey the parts by aligning the shapes or directions of the parts
A control device for a vibration feeder, which is an input key for setting and inputting a frequency for vibrating the electromagnet.
When the relationship between the frequency and the output voltage for vibrating the electromagnet pre
Memory for storing multiple frequency-voltage characteristics
And the output voltage that vibrates the electromagnet is controlled by a variable resistor.
The output voltage setting means to be set, the frequency input from the input key , and the set output
Of the plurality of frequency-voltage characteristics according to the input voltage value.
Memorize and lock the frequency-voltage characteristic value
Locking means, and the frequency and
And the value of the frequency-voltage characteristic determined by the output voltage
A control device for a vibration feeder, which is provided with drive control means for giving a magnet to drive .