JP2011034748A - Static eliminator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a static eliminator with power consumption restrained. <P>SOLUTION: The device is provided with an input part 41 capable of inputting detection signals detecting a work from outside, and a control part 14 for driving a sirocco fan 12 and a piezoelectric transformer 15 in a normal mode by a given driving time based on the detection signals inputted in the input part 41, and driving the sirocco fan 12 and the piezoelectric transformer 15 after an elapse of that driving time at a driving force smaller than at the normal driving time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a static eliminator for removing static electricity charged on a static elimination object.

  Conventionally, in a static eliminator, an ion generator that generates ions by corona discharge, and a blower fan, the ions generated by the ion generator are blown to the static elimination object by the blower fan, and the static elimination object What performs static elimination is known (for example, refer to Patent Document 1). Such a static eliminator is used to neutralize a workpiece such as an electronic component conveyed on a production line, and discharges static electricity that is charged by blowing ions to the workpieces that are sequentially conveyed. ing.

JP 2002-151293 A

  However, since the static eliminator as described above is always driven with a constant driving force, ions are also blown between the workpieces being conveyed. That is, although the work is not in a range where ions can be sprayed, a constant operation is always performed, and power consumption is wasted.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a static eliminator capable of suppressing power consumption.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a static eliminator that discharges ions from a static elimination object by blowing ions generated in an ion generating part by corona discharge to the static elimination object with a blower fan. And a trigger input means capable of inputting a detection signal for detecting the static elimination object from the outside, and the blower fan and the ion generator are normally set for a predetermined time based on the detection signal input to the trigger input means. After the predetermined time has elapsed, the driving control is performed so as not to stop the rotation of the blower fan by making the driving force smaller than that during the normal driving, and the ion generating unit is controlled not to corona discharge. And a control means.

  In this invention, since the blower fan and the ion generation unit are driven based on the detection signal that detects the static elimination object, it is possible to suppress unnecessary driving of the blower fan and the ion generation unit, and to reduce power consumption. it can. In addition, after the normal driving is completed, not only the driving force of the blower fan but also the driving force of the ion generating unit is reduced. It is possible to suppress the generated ozone and the like from being accumulated without being diffused. In addition, when driving with a low driving force, the blower fan is driven and controlled so as not to stop rotating, so it is possible to shorten the rise time of the blower fan at the start of normal driving, and ion blowing performance Can be suppressed. In addition, during driving with a low driving force, control is performed so as not to stop the rotation of the blower fan, and control is performed so as not to cause corona discharge of the ion generation unit, so that retention of ozone or the like can be further suppressed.

  According to a second aspect of the present invention, in the static eliminator according to the first aspect, the operation timing from the input of the detection signal to the trigger input means to the start of the normal driving of the blower fan and the ion generation unit is determined. It is characterized by comprising timing adjusting means for adjusting.

In this invention, it is possible to suitably set the timing from the detection of the static elimination object to the ion blowing operation, and it is possible to further reduce waste.
According to a third aspect of the present invention, in the static eliminator according to the second aspect of the present invention, the static eliminator includes a conveyance speed input means for inputting a conveyance speed of the static elimination object, and the timing adjustment means is connected to the conveyance speed input means. The operation timing is set based on the inputted conveyance speed.

In this invention, it becomes possible to spray ions on the static elimination object at a suitable timing based on the conveyance speed of the static elimination object.
A fourth aspect of the present invention is the static eliminator according to any one of the first to third aspects, further comprising a drive time adjusting means for adjusting the predetermined time for the normal drive. .

In this invention, it becomes possible to set suitably the length of the normal drive of a ventilation fan and an ion generation part, and it becomes possible to suppress waste more.
According to a fifth aspect of the present invention, in the static eliminator according to the fourth aspect, the driving time adjusting means sets the predetermined time based on a time during which the detection signal is input.

According to the present invention, it is possible to set the normal drive time of the blower fan and the ion generator in a suitable time based on the passage time of the static elimination object.
According to a sixth aspect of the present invention, in the static eliminator according to any one of the first to fifth aspects, the control unit is configured to drive power to the blower fan during driving with a driving force smaller than the normal driving. It is characterized in that the drive control is performed so as not to stop the supply.

  In this invention, when shifting from normal driving to driving with a low driving force (a driving force smaller than the normal driving), the power (driving power, driving force) to the blower fan is not stopped. Therefore, compared to a configuration in which the power to the blower fan is turned ON / OFF (on / off) when repeating the normal drive and the low drive, it is possible to reduce the burden on the blower fan and to suppress a decrease in life. .

  According to a seventh aspect of the present invention, in the static eliminator according to any one of the first to fifth aspects, the control means presets a time from the end of the normal drive to the start of the next normal drive. When the time is shorter than the reference time, the supply of drive power to the blower fan is stopped after the normal drive is completed.

  In the present invention, when the time from the end of the normal drive to the start of the next normal drive is shorter than a preset reference time, the blower fan during driving with a low driving force (a driving force smaller than the normal driving) The supply of driving power is stopped. This makes it possible to stop the supply of drive power to the blower fan while controlling the drive so as not to stop the rotation of the blower fan when driving with a low driving force, thereby further reducing power consumption. .

  Therefore, according to the above described invention, power consumption can be suppressed.

The schematic diagram which shows the static elimination apparatus of this embodiment. Schematic which shows the electrical structure of a static elimination apparatus. The timing chart for demonstrating the drive aspect of a static elimination apparatus.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the static eliminator 10 of the present embodiment includes a housing 11, a sirocco fan 12 that is housed and held in the housing 11, and a discharge unit 13 that is detachably attached to the front surface of the housing 11. And a control unit 14 for controlling the sirocco fan 12 and the discharge unit 13.

  The housing 11 has a circular suction port 11a formed at the center of the side surface and a blower outlet 11b formed at the mounting position of the front discharge unit 13, and the blower outlet 11b is orthogonal to the suction port 11a. Open in the direction. The sirocco fan 12 has a unitized motor 12a. When the sirocco fan 12 is rotationally driven by the motor 12a, the sirocco fan 12 sucks air through the suction port 11a and blows it in a direction perpendicular to the sucked direction. It operates to blow out air through the outlet 11b.

  The discharge unit 13 holds a discharge needle 21 electrically connected to the piezoelectric transformer 15 provided in the housing 11, a ground electrode 22 facing the discharge needle 21, and the discharge needle 21 and the ground electrode 22. And a unit case 23 made of an insulating resin material detachably attached to the housing 11. The unit case 23 has a through hole 23a communicating with the air outlet 11b, and the discharge needle 21 and the ground electrode 22 are configured to face each other in the through hole 23a.

  The control unit 14 controls the motor 12 a and the piezoelectric transformer 15 of the sirocco fan 12 to drive the sirocco fan 12 and the piezoelectric transformer 15. When a high voltage generated by the piezoelectric transformer 15 is applied to the discharge needle 21, corona discharge is generated and air around the tip of the discharge needle 21 is ionized, and the ionized air is blown by the sirocco fan 12. It is blown out from the through hole 23a of the unit case 23 by the operation. The piezoelectric transformer 15 is configured to alternately generate positive ions and negative ions by alternately applying high voltages having different polarities to the discharge needles 21.

  As shown in FIG. 1, the static eliminator 10 described above is installed in a production line L that conveys a workpiece W (for example, an electronic component), and blows ionized air onto the workpiece W that is sequentially conveyed. In this way, when ionized air is blown onto the workpiece W, static electricity charged on the workpiece W is removed, and adhesion of dust is prevented.

  A detection sensor 31 for detecting the presence or absence of the workpiece W is connected to the static eliminator 10 of the present embodiment via a cable 32. The detection sensor 31 is disposed at a predetermined position on the upstream side of the production line L with respect to the static eliminator 10, and outputs an output signal S based on the presence or absence of the workpiece W in the detection range to the input unit 41 of the static eliminator 10. Specifically, the detection sensor 31 outputs a high level output signal S (detection signal) when the workpiece W is in the detection range, and outputs a low level output signal S when the workpiece W is not in the detection range. ing. As the detection sensor 31, a photoelectric sensor, a proximity sensor capable of magnetic detection, or the like is used.

  The control unit 14 drives the sirocco fan 12 and the piezoelectric transformer 15 in the normal mode based on the detection signal from the detection sensor 31, and drives the motor 12a and the piezoelectric transformer 15 in the low output mode during a period other than the normal mode. In the low output mode, the drive voltages of the motor 12a and the piezoelectric transformer 15 are set smaller than in the normal mode. In the low output mode, the control unit 14 controls the supply of driving power to the motor 12a so as not to stop so that the rotation of the sirocco fan 12 does not stop. Further, in the low output mode, the control unit 14 drives and controls the piezoelectric transformer 15 with a driving power at a voltage level that does not cause corona discharge in the discharge unit 13. In the piezoelectric transformer 15, the absolute value of the high voltage applied to the discharge needle 21 is smaller than that in the normal mode.

  Further, the static eliminator 10 includes a conveyance speed input unit 42 for inputting the conveyance speed of the workpiece W. Based on the conveyance speed of the workpiece W input to the conveyance speed input unit 42, the control unit 14 operates the operation timing from the input of the detection signal to the input unit 41 to the start of driving of the motor 12a and the piezoelectric transformer 15 (in other words, If so, the delay time T1) is set. The control unit 14 calculates the delay time T1 from the distance between the detection position of the detection sensor 31 and the ion blowing position on the production line L input in advance and the transport speed of the work W, and the work W In contrast, it is possible to spray ions at a suitable timing. Further, the conveyance speed input unit 42 may be configured such that the user can set an arbitrary conveyance speed, and the conveyance speed is based on a signal corresponding to the conveyance speed from the production line L. It may be configured to set.

  FIG. 3 is a timing chart showing a driving mode of the static eliminator 10 of the present embodiment. When the power switch 43 (see FIG. 1) of the static eliminator 10 is turned on, the controller 14 first drives the motor 12a and the piezoelectric transformer 15 of the sirocco fan 12 in the low output mode. Here, when the detection sensor 31 detects the workpiece W that has been conveyed, a detection signal is input to the input unit 41 of the static eliminator 10. Then, as shown in FIG. 3, the control unit 14 delays the motor 12a and the piezoelectric transformer 15 by the delay time T1 set based on the conveyance speed of the workpiece W from the time when the detection signal is input to the input unit 41, and sets the motor 12a and the piezoelectric transformer 15 in the normal mode. Drive with. As a result, it is possible to spray ions at a suitable timing in accordance with the work W entering the range where ions can be sprayed, and it is possible to suppress unnecessary driving of the motor 12a and the piezoelectric transformer 15. . At this time, the control unit 14 sets the driving time T3 in the normal mode based on the time T2 during which the detection signal is input. Then, the control unit 14 drives the motor 12a and the piezoelectric transformer 15 in the low output mode when the driving time T3 has elapsed from the start of driving of the motor 12a and the piezoelectric transformer 15 in the normal mode. The drive time set by the control unit 14 is preferably slightly longer than the time T2 during which the detection signal is input in order to prevent ion spray leakage.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the input unit 41 that can input a detection signal for detecting the workpiece W from the outside, and the sirocco fan 12 and the piezoelectric transformer 15 based on the detection signal input to the input unit 41 for the drive time T3. Drive is performed in the normal mode, and after the drive time T3 has elapsed, the drive force is made smaller than that during normal drive to control the sirocco fan 12 so that the rotation of the sirocco fan 12 does not stop, and the discharge unit 13 does not cause corona discharge. And a control unit 14 that drives and controls the piezoelectric transformer 15. Accordingly, since the sirocco fan 12 and the piezoelectric transformer 15 are driven based on the detection signal that detects the workpiece W, it is possible to suppress unnecessary driving of the sirocco fan 12 and the piezoelectric transformer 15 and to reduce power consumption. it can. In addition, after the normal driving is completed, not only the driving force of the motor 12a of the sirocco fan 12 but also the driving force of the piezoelectric transformer 15 is reduced, so that the discharge unit 13 is compared with the case where only the driving force of the sirocco fan 12 is reduced. It is possible to suppress the accumulation of ozone and the like that accompanies the generation of ions without being diffused. Furthermore, since the sirocco fan 12 is controlled so as not to stop rotating when driven in the low output mode, it is possible to shorten the rise time of the sirocco fan 12 at the start of driving in the normal mode. It is possible to suppress a decrease in ion blowing performance. Further, during the driving in the low output mode, control is performed so as not to stop the rotation of the sirocco fan 12, and control is performed so that the discharge unit 13 is not subjected to corona discharge. .

  (2) In this embodiment, as a timing adjustment means for adjusting the operation timing (delay time T1) from the input of the detection signal to the input unit 41 to the start of normal mode driving of the sirocco fan 12 and the piezoelectric transformer 15. Since the control part 14 is provided, it becomes possible to set suitably the timing from the detection of the workpiece | work W to the ion blowing operation, and it becomes possible to suppress waste more.

  (3) In the present embodiment, the conveyance speed input unit 42 for inputting the conveyance speed of the workpiece W is provided, and the control unit 14 sets the operation timing based on the conveyance speed input to the conveyance speed input means. The ions can be sprayed onto the workpiece W at a suitable timing based on the conveyance speed of the workpiece W.

  (4) In this embodiment, since the controller 14 is provided as a drive time adjusting means for adjusting the drive time T3 to be driven in the normal mode, the drive time T3 of the sirocco fan 12 and the piezoelectric transformer 15 is suitably set. This makes it possible to reduce waste.

  (5) In the present embodiment, since the control unit 14 sets the drive time T3 in the normal mode based on the time T2 during which the detection signal is input, the sirocco fan is used in a suitable time based on the passing time of the workpiece W. 12 and the drive time T3 of the piezoelectric transformer 15 can be set.

  (6) In the present embodiment, the control unit 14 performs drive control so as not to stop the supply of drive power to the sirocco fan 12 during driving in the low output mode. The power (driving power, driving force) to the sirocco fan 12 is not stopped. Therefore, compared to a configuration in which power to the sirocco fan 12 is turned ON / OFF (on / off) when repeating the normal mode and the low output mode, the burden on the sirocco fan 12 can be reduced, and a reduction in the life can be suppressed. Become.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the sirocco fan 12 whose suction direction and discharge direction are orthogonal to each other is used. However, for example, a fan whose suction direction and discharge direction are the same may be used.

  In the above embodiment, the time T2 during which the detection signal is input may be set as the normal mode driving time T3 as it is. In the above embodiment, the driving time T3 in the normal mode is set based on the time T2 during which the detection signal is input. However, the driving time T3 can be arbitrarily set by the user. Good.

  In the above embodiment, the control unit 14 has been described in the case where the piezoelectric transformer 15 is driven and controlled with a driving power at a voltage level that does not cause corona discharge in the discharge unit 13 in the low output mode. Instead, the supply of drive power to the piezoelectric transformer 15 may be stopped (that is, the drive power is made zero).

  -In above-mentioned embodiment, although the control part 14 is controlled not to stop supply of the drive power with respect to the motor 12a in a low output mode, it is not limited to this in particular, Stops supply of the drive power with respect to the motor 12a You may make it do. In this case, for example, the control unit 14 compares the time A from the end of the normal mode to the start of the next normal mode with a preset reference time B, and when the time A is shorter than the reference time B, Stops the supply of driving power to the motor 12a of the sirocco fan 12 after the end of the normal mode, and when the time A is longer than the reference time B, it is smaller than when driving in the normal mode after the end of the normal mode. The motor 12a is driven with the driving force. The reference time B is set to a time shorter than the time from the end of the normal mode until the rotation of the sirocco fan 12 stops. According to such a configuration, when the time A from the end of the normal mode to the start of the next normal mode is shorter than a preset reference time, the drive power is supplied to the sirocco fan 12 in the low output mode. Stop. As a result, it is possible to stop the supply of drive power to the sirocco fan 12 while controlling the drive so as not to stop the rotation of the sirocco fan 12 in the low output mode, thereby further reducing power consumption. . The time A from the end of the normal mode to the start of the next normal mode may be arbitrarily set by the user, and the normal mode drive time T3, the work W conveyance speed, The control unit 14 may be configured to calculate the time A based on the interval of the workpieces W. Further, the control unit 14 may be configured to calculate the time A from the rise and fall times of the detection signal from the detection sensor 31 and the normal mode drive time T3.

  DESCRIPTION OF SYMBOLS 10 ... Static elimination apparatus, 12 ... Sirocco fan as a ventilation fan, 13 ... Discharge unit which comprises an ion generation part, 14 ... Control part as a control means, a timing adjustment means, and a drive time adjustment means, 15 ... Constituting an ion generation part Piezoelectric transformer, 41... Input section as trigger input means, 42... Transport speed input section as transport speed input means, W.

Claims (7)

A static eliminator that neutralizes the static elimination object by blowing the ions generated in the ion generation part by corona discharge to the static elimination object with a blower fan,
Trigger input means capable of inputting a detection signal for detecting the static elimination object from the outside,
Based on the detection signal input to the trigger input means, the blower fan and the ion generating unit are normally driven for a predetermined time, and after the predetermined time has elapsed, the driving force is made smaller than that during the normal driving to reduce the driving force. A static eliminator comprising: control means for controlling the driving so as not to stop the rotation of the blower fan, and controlling the driving so as not to corona discharge the ion generator. The static eliminator according to claim 1,
A static eliminator comprising a timing adjustment unit for adjusting an operation timing from the input of the detection signal to the trigger input unit to the start of the normal driving of the blower fan and the ion generation unit. The static eliminator according to claim 2,
A transport speed input means for inputting the transport speed of the static elimination object;
The static eliminator characterized in that the timing adjustment means sets the operation timing based on the transport speed input to the transport speed input means. In the static elimination apparatus of any one of Claims 1-3,
A static eliminator comprising a drive time adjusting means for adjusting the predetermined time for the normal drive. In the static elimination apparatus of Claim 4,
The neutralizing device, wherein the driving time adjusting means sets the predetermined time based on a time during which the detection signal is input. In the static elimination apparatus of any one of Claims 1-5,
The static eliminator characterized in that the control means performs drive control so as not to stop the supply of drive power to the blower fan during drive with a drive force smaller than the normal drive. In the static elimination apparatus of any one of Claims 1-5,
When the time from the end of the normal drive to the start of the next normal drive is shorter than a preset reference time, the control means supplies drive power to the blower fan after the end of the normal drive. A static eliminator characterized by stopping.

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