JP2020171901A - Sieve device - Google Patents

Abstract

To provide a sieve device which always monitors a vibrational state of a vibration part, can quickly detect mechanical failures, motor failures and so on, and can prevent purification function by sieving from deteriorating.SOLUTION: A sieve device comprises a cradle 2, and a vibration part 4 which reciprocatingly vibrates in one direction in a plan view with respect to the cradle 2, and has a screen frame 3. The vibration part 4 comprises: a first sensor unit 10 having a vibration part acceleration detection part 11 which can detect acceleration of the vibration part 4, and a vibration part angular speed detection part 12 which can detect angular speed of the vibration part 4; and a vibration state measuring part 14 which measures a vibration state of the vibration part 4 on the basis of the acceleration and the angular speed of the vibration part 4 which have been detected by the first sensor unit 10.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sieving device that sifts granules by particle size by vibration.

Conventionally, as an apparatus for sieving ground wheat or the like, for example, the purifier described in Patent Document 1 is known.
In this purifier, the four corners of a sheave box in which a plurality of sieve nets having different meshes are arranged are supported by columns via rubber springs, the sheave box is connected to a vibration motor, and one upper end of the sheave box is connected. A supply gutter that supplies unsorted stock is connected to the sieve box, and a collection device that collects the fallen stock is installed below the sieve box.
Then, when the vibration electric motor is operated, the sheave box and the collecting device vibrate back and forth, and the stock supplied on the sheave box through the supply gutter is shaken, so that the stock is sorted by particle size and collected. Collected by a collector.

Japanese Unexamined Patent Publication No. 8-39002

The sieving device such as the purifier described in Patent Document 1 does not have a function of monitoring the vibration state of the sheave box during operation, and visually determines the swing angle and swing width of the sheave box during installation. It was adjusted to an appropriate value.
In addition, after the start of operation, the maintenance staff also visually inspected whether or not the rocking state was properly maintained. Furthermore, the frequency of the sheave box was only set by the output frequency of the motor inverter.
However, in the visual inspection, the judgment differs depending on the person in charge, so even if there is an abnormality, the response may be delayed, and if the rubber spring that supports the sheave box deteriorates or the machine breaks down, the abnormality is overlooked. An accident may occur. In addition, when a failure occurs in the oscillating motor, the stock does not spread uniformly on the sieve, and the purification performance may deteriorate.
Furthermore, since the frequency of the vibrating part is not measured, the set value and the actual frequency may differ, and as a result, the sieving performance may not reach the product specifications.
The problem to be solved by the present invention is to provide a sieving device that constantly monitors the vibrating state of the vibrating portion, can quickly detect a mechanical failure, a failure of the vibrating motor, etc., and prevents the purification function by sieving from deteriorating. To provide.

The invention according to claim 1 of the present application is a sieving device including a gantry and a vibrating portion having a sieving frame that vibrates reciprocating in one direction in a plan view with respect to the gantry. The vibration unit is provided with a first sensor unit having a vibration unit acceleration detection unit capable of detecting at least the acceleration of the vibration unit, and the vibration of the vibration unit is based on the acceleration of the vibration unit detected by the first sensor unit. It is a sieving device including a vibration state measuring unit for measuring a state.

In the invention according to claim 2 of the present application, the first sensor unit includes a vibration unit angular velocity detection unit capable of detecting the angular velocity of the vibration unit, and the vibration state measuring unit is the vibration detected by the first sensor unit. The sieving device according to claim 1, wherein the vibration state of the vibrating portion is measured based on the angular velocity of the portion.

The invention according to claim 3 of the present application includes a gantry acceleration detection unit capable of detecting the acceleration of the gantry and a second sensor unit having a gantry angular velocity detection unit capable of detecting the angular velocity of the gantry. The sieve according to claim 1 or 2, wherein the vibration state measuring unit measures the vibration state of the gantry based on the acceleration and the angular velocity of the gantry detected by the second sensor unit. It is a device.

The invention according to claim 4 of the present application is the sieving apparatus according to claim 2 or 3, wherein the vibration state measured by the vibration state measuring unit is a vibration angle.

The invention according to claim 5 of the present application is the sieving device according to claim 1 or 3, wherein the vibration state measured by the vibration state measuring unit is displacement.

In the invention according to claim 6, the vibration state measuring unit can measure at least a displacement in a direction orthogonal to one direction in which the vibrating unit reciprocates based on the acceleration detected by the vibration unit acceleration detecting unit. The sieving apparatus according to claim 5, wherein the sieving device is characterized by the above.

The invention according to claim 7 of the present application is the sieving apparatus according to claim 1, wherein the vibration state of the vibration unit measured by the vibration state measurement unit is a frequency in one direction.

The invention according to claim 8 of the present application is the sieving device according to any one of claims 1 to 7, wherein the invention includes a display device for displaying the vibration state measured by the vibration state measuring unit. is there.

According to the present invention, since the vibration state of the vibrating portion can be constantly monitored, it is possible to immediately detect that the vibration state is out of the appropriate range, and it is possible to promptly respond to a machine failure or the like, and the sieving accuracy. Can also be prevented from decreasing.

In addition, a second sensor unit consisting of a gantry acceleration detection unit capable of detecting the gantry acceleration and a gantry angular velocity detection unit capable of detecting the gantry angular velocity is provided, and the gantry vibration state is measured to measure the gantry horizontal. It is possible to know the state, the degree of vibration transmission from surrounding machines, the degree of shaking due to the hardness of the base such as the ground or structure on which the gantry is installed, and it is possible to suppress the deterioration of the sieving performance due to these effects.

In addition, the vibration state measuring unit can measure the displacement in the direction perpendicular to the one direction in which the vibrating unit vibrates based on the acceleration detected by the vibration unit acceleration detecting unit, so that the vibration in one direction can be measured. The magnitude of vibration in the direction orthogonal to this can be accurately measured without being affected, and the abnormality detection accuracy is improved.

In addition, by having a monitoring device that displays the vibration state measured by the vibration state measuring unit, the vibration state can be known in real time, and it is easy to notice the occurrence of an abnormality.

It is a side view of the sieving apparatus which shows 1st Embodiment of this invention. It is a front view of the sieving apparatus which shows 1st Embodiment of this invention. It is a block diagram of the monitoring device and the 1st sensor unit which concerns on 1st Embodiment of this invention. It is a signal processing block diagram of the sieving apparatus which shows 1st Embodiment of this invention. It is a figure which shows the display example of the monitoring apparatus in 1st Embodiment of this invention. It is a front view of the sieving apparatus which shows the 2nd Embodiment of this invention. It is a block diagram of the monitoring device, the 1st sensor unit and the 2nd sensor unit which concerns on 2nd Embodiment of this invention. It is a figure which shows the display example of the monitoring apparatus in 2nd Embodiment of this invention. It is a figure which shows the display example of the monitoring apparatus in 2nd Embodiment of this invention. It is (A) side view and (B) front view which show the direction of the installation angle of the frame of the sieving apparatus in the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Needless to say, the present invention is not limited to the embodiments.

[First Embodiment]
1 to 5 show a first embodiment of the present invention.
As shown in FIGS. 1 and 2, the sieving device 1 of the present invention includes a gantry 2 and a vibrating portion 4 that reciprocates in one direction with respect to the gantry 2 and has a sieving frame 3.
In the following description, the direction in which the vibrating unit 4 reciprocates vibrates in the X direction (the left-right direction of the paper surface in FIG. 1 and the depth direction of the paper surface in FIG. The direction, the horizontal direction of the paper surface in FIG. 2, the direction orthogonal to the X direction and the Y direction is referred to as the Z direction (the vertical direction of the paper surface in FIGS. 1 and 2).

Supports 5 are provided at the four corners of the gantry 2, and the vibrating portion 4 is supported by rubber springs 6 attached to these columns 5.
A vibrating electric motor 7 is provided in the vibrating unit 4, and the vibrating unit 4 reciprocates in the X direction by operating the vibrating electric motor 7.
The gantry 2 is provided with a frame (not shown), and the frame is provided with a cover 30. The gantry 2, the frame, and the cover 30 do not reciprocate.
What is indicated by the symbol 8 is a supply cylinder for supplying the granular material before sieving into the sieving frame 3 from above.

In the sieve frame 3 of the vibrating portion 4, a plurality of sieve nets having different mesh roughness are laminated so that the mesh becomes finer toward the bottom.
A collection device 9 for collecting the particles that have passed through each of the sieve nets of the sieve frame 3 by class is installed in the vibrating unit 4, and the particles collected by the collection device 9 are taken out of the machine. Further, the granules remaining on the sieve frame 3 are discharged to the outside of the machine through another route.
Since the above structure is well known in the past, detailed description thereof will be omitted.

As shown in FIGS. 1 and 2, the first sensor unit 10 is attached to the outer surface of the sieve frame 3 of the vibrating portion 4.
As shown in FIG. 3, the first sensor unit 10 includes a vibrating unit acceleration detecting unit 11 capable of detecting the acceleration of the vibrating unit 4 in the triaxial direction and a vibration capable of detecting the angular velocity of the vibrating unit 4 in the triaxial direction. It has a part angular velocity detection unit 12.
The first sensor unit 10 is connected to a monitoring device 13 (see FIG. 2) installed on the outer surface of the cover 30.

The monitoring device 13 is provided with a vibration state measuring unit 14, a display device 16, an alarm buzzer 17, and the like.
Further, the vibration unit acceleration detection unit 11, the vibration unit angular velocity detection unit 12, the display device 16, and the alarm buzzer 17 of the first sensor unit 10 are connected to the vibration state measurement unit 14. Further, the vibration state measuring unit 14 is connected to the operation management system of the facility via a general-purpose external communication means.
The vibration state measurement unit 14 is a calculation processing unit, and vibrates based on the acceleration of the vibration unit 4 detected by the vibration unit acceleration detection unit 11 and the angular velocity of the vibration unit 4 detected by the vibration unit angular velocity detection unit 12. The vibration state of the part 4 is measured. The measured vibration state is converted into display information and sent to the display device 16.

Next, the signal processing of the sieving device 1 will be described with reference to FIG.
By performing the operation start operation, the sieving device 1 is activated, the vibrating unit 4 vibrates reciprocally, and the first sensor unit 10 starts detection.
The acceleration of the vibration unit 4 detected by the vibration unit acceleration detection unit 11 of the first sensor unit 10 and the angular velocity of the vibration unit 4 detected by the vibration unit angular velocity detection unit 12 are the vibration state measurement units by wireless communication or wired communication, respectively. Sent to 14.

The vibration state measuring unit 14 measures the displacement of the vibrating unit 4 in the three axial directions and the frequency in the X-axis direction from the acceleration of the vibrating unit 4, and the vibration angle of the vibrating unit 4 in the three directions from the acceleration and the angular velocity of the vibrating unit 4. To measure.
The displacement is measured by removing the noise from the detected acceleration and then integrating twice without the influence of the gravitational acceleration.
The vibration angle is calculated from the acceleration and angular velocity of the vibrating unit 4 by using a Kalman filter, an extended Kalman filter, a Madgwick filter, a complementary filter, or the like.

The vibration state measuring unit 14 synthesizes a waveform from the measured displacements of the vibration unit 4 in the X-axis direction, the Y-axis direction, and the Z-axis direction, and displays the displacement on the display screen of the display device 16 as shown in FIG. The size and direction of the Lissajous figure on the XY axes (the figure on the left side of FIG. 5), the Lissajous figure on the XX axis (the figure in the center of FIG. 5), and the Lissajous figure on the YY axis (FIG. 5) are orthogonal to each other. Display as the figure on the right side of.
Further, the displacements of the vibrating unit 4 in the X-axis direction, the Y-axis direction, and the Z-axis direction, and the vibration angles in the three directions (tilt angle in the XY plane due to vibration, tilt angle in the XY plane, Y- The tilt angle in the Z plane), the frequency in the X-axis direction, and the amplitude in the X-axis direction measured from the synthesized waveform are displayed as numerical values on the screen of the display device 16.

In FIG. 5, the displacements are -4.48 to 4.48 mm in the X-axis direction, -0.02-0.01 mm in the Y-axis direction, -0.47 to 0.47 mm in the Z-axis direction, and the vibration angles. The tilt angle in the XY plane is 6.0 °, the tilt angle in the XY plane is 0.0 °, the tilt angle in the YY plane is 0.0 °, and the amplitude in the X-axis direction is 9. With 00 mm and a frequency of 10.00 Hz in the X-axis direction, it is displayed that stable operation is in progress.
As shown by this numerical value, it can be seen that the vibrating portion 4 vibrates in the X-axis direction, slightly vibrates in the Z-axis direction, and hardly vibrates in the Y-axis direction. Further, the reason why only the inclination angle in the XZ plane is 6.0 ° is that the sieve frame 3 is tilted downward in the left direction of the paper surface as shown in FIG. 1, and the actual vibrating portion 4 is in the X axis direction. Instead of vibrating in parallel with, it oscillates at an angle as shown by the double-headed arrow in FIG.

The vibration state measuring unit 14 is set in advance with the displacement, vibration angle, frequency, and amplitude in the appropriate range of the vibration unit 4, and the vibration state measuring unit 14 sets the measured displacement and the displacement determination value. , The measured vibration angle and the angle judgment value are compared, the measured frequency and the frequency judgment value are compared, and the measured amplitude and the amplitude judgment value are compared.

When all the measured values of the vibration state measuring unit 14 are within the determination values, the screen of the display device 16 displays the vibration state of the vibration state 4 and indicates that it is normal as in "stable operation". Display in characters.
On the other hand, when these values deviate from the judgment values, an abnormality process is performed to activate the alarm buzzer 17, and the character display of the display device 16 is changed to "unstable" or the like to inform the operator or the supervisor. Notify the occurrence of an abnormality.

[Second Embodiment]
6 to 10 show a second embodiment of the present invention.
In the second embodiment, in addition to the structure of the first embodiment, as shown in FIG. 6, a second sensor unit 18 attached to the gantry 2 is provided.

The second sensor unit 18 has a gantry acceleration detection unit 19 capable of detecting the acceleration of the gantry 2 similar to the first sensor unit 10, and a gantry angular velocity detection unit 20 capable of detecting the angular velocity of the gantry 2.
As shown in FIG. 7, the second sensor unit 18 is connected to the vibration state measuring unit 14 of the monitoring device 13, and the acceleration of the gantry 2 detected by the gantry acceleration detection unit 19 of the second sensor unit 18 and the gantry angular velocity detection unit. The angular velocity of the gantry 2 detected by 20 is transmitted to the vibration state measuring unit 14 of the monitoring device 13.

The vibration state measuring unit 14 measures the vibration state of the gantry 2 in the same manner as the measurement of the vibration state of the vibrating unit 4 in the first embodiment, whereby the installation angle of the gantry 2 and the machine arranged around the gantry 2 are transmitted. The influence of vibration, the shaking of the gantry 2 due to the hardness of the base on which the sieving device 1 is installed, etc. can be detected as displacement.
Since the gantry 2 is originally fixed and is not affected by the reciprocating vibration of the vibrating portion 4 by the rubber spring 6, the displacement and the installation angle are usually measured, and the frequency and amplitude are not measured.

The vibration state measuring unit 14 converts the measured vibration state of the gantry 2 into display information and sends it to the display device 16, and causes the screen of the display device 16 to display the vibration state of the vibration unit 4 as shown in FIG. ..
On the display screen of the display device 16, the Lissajous figure of the XY axes (the figure on the left side of FIG. 8), the Lissajous figure of the XY axes (the figure in the center of FIG. 8), in which the displacements of the gantry 2 are orthogonal to each other, are displayed. It is displayed as a Lissajous figure on the YZ axis (the figure on the right side of FIG. 8).
Further, the displacements of the gantry 2 in the X-axis direction, the Y-axis direction, and the Z-axis direction are displayed as numerical values.

In FIG. 8, the displacements are normal as -0.10 to 0.10 mm in the X-axis direction, -0.02-0.01 mm in the Y-axis direction, and -0.02-0.02 mm in the Z-axis direction. Is displayed.
As shown by this numerical value, it can be seen that the gantry 2 is hardly displaced, that is, the vibration of the vibrating portion 4 is not transmitted, and the rubber spring 6 is fully functioning.

A displacement in an appropriate range of the gantry 2 is set as a determination value in the vibration state measurement unit 14, and the vibration state measurement unit 14 compares the measured displacement with the displacement determination value.
When all the measured values of the vibration state measuring unit 14 are within the determined values, the characters such as "normal" are displayed on the screen of the display device 16.
When the measured value deviates from the determined value, an abnormality process is performed to activate the alarm buzzer 17, and the character display of the display device 16 is changed from "normal" to "abnormal".
Even if the alarm buzzer 17 is activated, the operator or the supervisor can immediately understand whether the vibration unit 4 is defective or the gantry 2 is defective by looking at the text display.

Further, the vibration state measuring unit 14 converts the measured vibration state of the gantry 2 into display information and sends it to the display device 16, and displays the vibration state of the vibration unit 4 on the screen of the display device 16 as shown in FIG. You may also let them do it.
On the display screen of the display device 16, the installation angle of the gantry 2 is displayed as an image imitating a spirit level.

In FIG. 9, as a spirit level, the current state of the gantry 2 is shown in a circular range in which the X-axis and the Y-axis are represented. The thick circle that imitates the air bubbles is the current state of the gantry 2. The diameter of the two-dot dashed line indicates the permissible range. In addition, the installation angle around the X-axis and the installation angle around the Y-axis are displayed as numerical values. In the figure, the displayed installation angles are 0.2 ° around the X-axis and -0.4 ° around the Y-axis, and the current state is within the permissible range. The installation angle of is shown to be normal.

FIG. 10 shows the direction of the installation angle of the gantry 2. As shown in FIG. 10A, the installation angle around the Y-axis of the gantry 2 is displayed as a plus when the left side is raised and a minus when the left side is lowered, centering on the second sensor unit 18. As shown in FIG. 10B, the installation angle of the gantry 2 around the X-axis is displayed as a plus when the right side is raised and a minus when the right side is lowered, centering on the second sensor unit 18.
By displaying the display imitating a spirit level in this way, the worker or the supervisor can easily understand the installation state of the gantry.

Although not shown, the display device 16 is used as a touch panel, and buttons such as "calibration", "hold", and "reset" can be operated on the display screen in addition to the image imitating the spirit level. It may be displayed.
For example, the "calibration" button is provided as a momentary switch so that it remains in the ON state while being touched. Further, the "hold" button and the "reset" button are provided as alternate switches so that the ON state and the OFF state are alternately switched each time they are touched.

At the timing when the "calibration" button is touched and released, the installation angle around the X-axis and the Y-axis of the gantry 2 at that time is set to 0 °, and the state of change in the installation angle thereafter can be measured.
By touching the "hold" button, the displayed installation angle value of the gantry 2 can be stopped at an arbitrary timing. As a result, even if the measured installation angle value fluctuates at any time due to the vibration transmitted from the vibrating unit 4 to the gantry 2 and it is difficult to see, the installation angle value displayed on the display screen of the display device 16 can be displayed. It is possible to stop and check.

By touching the "reset" button, the displayed value of the installation angle of the gantry 2 can be returned to the factory default adjustment value of the vibration state measuring unit 14.
In this way, by operating the display device 16 provided in the monitoring device 13 so that the vibration state measuring unit 14 can be adjusted, adjustment at the time of mounting the vibration state measuring unit 14 and regular maintenance can be performed. It is possible to significantly reduce the time and effort required.

Further, the vibration state measuring unit 14 may be set with the determination values of the displacement and the installation angle in the appropriate range of the gantry 2, and the measured displacement and the installation angle may be compared with the determination values to make a determination.
In this case, when all the measured values of the vibration state measuring unit 14 are within the determination values, the characters such as "normal" are displayed on the screen of the display device 16. When the measured value deviates from the determined value, an abnormality process is performed to activate the alarm buzzer 17, and the character display of the display device 16 is changed from "normal" to "abnormal".
In this way, even if the alarm buzzer 17 is activated, the operator or the supervisor can immediately understand whether the vibration unit 4 is defective or the gantry 2 is defective by looking at the text display.

[Other variants]
The present invention is not limited to the above embodiments. For example, the following are also included.

In the first embodiment, the vibration state measuring unit measures all the vibration angles, displacements, frequencies, and amplitudes of the vibrating parts and displays them on the monitoring device, but some of them may be used.
Further, the vibration in one direction (X direction) in the plan view of the vibrating part is not a problem because it is the direction that should be vibrated, but if the vibration in the direction orthogonal to this (Y direction, Z direction) is too large. Since there are effects such as scattering of granular materials and machine failure, the vibration state measuring unit measures only the displacement in the Y direction and the Z direction, and the displacement in the X direction can be omitted without measuring. ..
In order to prevent the granules on the sieve frame from spilling, it is sufficient to pay attention to the inclination angle in the XZ plane and the inclination angle in the YZ plane. Therefore, the angle determination values in the XZ plane and Y Only appropriate tilt angles in the −Z plane may be set, and these angle determination values may be compared with the measured tilt angles in the XZ plane and the tilt angles in the YZ plane.

In a sieving device in which two vibrating motors 7 rotate in opposite directions and the internal unbalanced weights simultaneously vibrate in one direction (X direction) in a plan view of the vibrating part, the displacement in at least the Y direction. If you pay particular attention to, you will be able to quickly detect malfunctions in the synchronization of the two vibrating motors.

In the second embodiment, the vibration state measuring unit measures the installation angle and displacement of the gantry and displays them on the monitoring device, but either one may be used.

In the second embodiment, the vibration state measuring unit measures the installation angle and displacement of the gantry and displays them on the monitoring device. However, as in the measurement of the vibration unit, at least one of the frequency and the amplitude may be measured. good. In this case, the frequency and amplitude can be monitored, and it is possible to quickly discover that the vibration of the vibrating portion is transmitted due to, for example, breakage of the rubber spring.

In the present embodiment, the vibration state is measured when the vibrating portion starts the reciprocating motion, but the present invention is not limited to this, and the first sensor unit, the second sensor unit, and even when the vibrating portion does not reciprocate. The monitoring device 13 may be operated to measure the vibration state. In this case, the postures of the vibrating portion and the gantry when the vibrating portion is stationary can be measured.

In the present embodiment, the first sensor unit is attached to the sieve frame of the vibrating unit 4, but is not limited to this. Any place may be used as long as it vibrates.

In the present embodiment, the monitoring device is attached to the cover of the sieving device, but the present invention is not limited to this, and the monitoring device may not be directly attached to the sieving device but may be provided at a distance. Those provided with such a monitoring device are also included in the sieving device of the present invention.

In the present embodiment, the installation angle of the gantry is displayed as a spirit level as shown in FIG. 9, but the present invention is not limited to this, and the displacement may be displayed as a numerical value in the same manner as the displacement shown in FIG. For example, on the screen shown in FIG. 8, the “displacement (pp)” may be arranged next to the “installation angle” to be displayed in the same manner as the “vibration angle” in FIG.
Further, the vibration state measuring unit may set an angle determination value for the installation angle of the gantry, and the vibration state measurement unit may compare the measured installation angle with the angle determination value. In this case, if the measured installation angle is within the angle determination value, "normal" or the like may be displayed on the screen of the display device in the same manner as the displacement shown in FIG. In addition, even if the measured installation angle deviates from the angle judgment value, the alarm buzzer is activated by performing abnormality processing as in the case of displacement, and the text display on the display device is changed from "normal" to "abnormal". You may change it to.

In the present embodiment, the measurement of the vibrating portion and the gantry has been described as being performed while the vibrating portion of the sieving device is in operation, but the present invention is not limited to this, and the measurement may be performed while the vibrating portion is stopped. In this case, it is possible to monitor the state of the installed posture immediately after the installation and before the operation, the posture when the operation is stopped, and the transmission of vibration from another sieving device operated adjacently.

In the present embodiment, in order to detect the vibrating state of the vibrating unit, the vibrating unit acceleration detecting unit and the vibrating unit angular velocity detecting unit are provided, but the present invention is not limited to this. The vibration unit acceleration detection unit may be provided only. In this case, the angular velocity cannot be detected and the vibration angle cannot be measured, but simple measurement can be performed and the cost can be reduced.

Each technical matter in any embodiment may be applied to other embodiments as an embodiment.

1 Sieve separation device 2 Stand 3 Sieve frame 4 Vibration part 5 Support column 6 Rubber spring 7 Vibration motor 8 Supply cylinder 9 Collection device 10 1st sensor unit 11 Vibration part Acceleration detection part 12 Vibration part Angular velocity detection part 13 Monitoring device 14 Vibration state Measuring unit 16 Display device 17 Alarm buzzer 18 Second sensor unit 19 Mount acceleration detection unit 20 Mount angular velocity detection unit 30 Cover

Claims (8)

A sieving device including a gantry and a vibrating portion having a sieving frame that reciprocates in one direction in a plan view with respect to the gantry.
The sieving device
The vibrating unit is provided with a first sensor unit having at least a vibrating unit acceleration detecting unit capable of detecting the acceleration of the vibrating unit.
A vibration state measuring unit that measures the vibration state of the vibrating unit based on the acceleration of the vibrating unit detected by the first sensor unit.
A sieving device characterized by comprising. The first sensor unit includes a vibrating unit angular velocity detecting unit capable of detecting the angular velocity of the vibrating unit.
The sieving device according to claim 1, wherein the vibration state measuring unit measures the vibration state of the vibrating portion based on the angular velocity of the vibrating portion detected by the first sensor unit. The gantry
A second sensor unit having a gantry acceleration detection unit capable of detecting the acceleration of the gantry and a gantry angular velocity detection unit capable of detecting the angular velocity of the gantry is provided.
The sieving device according to claim 1 or 2, wherein the vibration state measuring unit measures the vibration state of the gantry based on the acceleration and the angular velocity of the gantry detected by the second sensor unit. .. The sieving device according to claim 2 or 3, wherein the vibration state measured by the vibration state measuring unit is a vibration angle. The sieving device according to claim 1 or 3, wherein the vibration state measured by the vibration state measuring unit is displacement. The claim is characterized in that the vibration state measuring unit can measure at least a displacement in a direction orthogonal to one direction in which the vibrating unit reciprocates based on the acceleration detected by the vibration unit acceleration detecting unit. The sieving apparatus according to 5. The sieving device according to claim 1, wherein the vibration state of the vibration unit measured by the vibration state measurement unit is a frequency in one direction. The sieving device according to any one of claims 1 to 7, wherein the vibration state measuring unit has a display device for displaying the measured vibration state.