JP7331427B2 - sieving device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sieving device that sieves particulates by particle size by vibration.

Conventionally, as a device for sieving crushed wheat or the like, for example, a purifier described in Patent Document 1 is known.
This purifier has a sieve box with a plurality of sieve meshes with different meshes, and supports the four corners of the sieve box with supports via rubber springs. A supply gutter for supplying stock before sorting is connected to the sieve box, and a collecting device for collecting the fallen stock is installed below the sieve box.
When the vibrating motor is operated, the sieve box and the collection device reciprocate in the longitudinal direction, and the stock supplied onto the sieve box through the supply gutter is shaken, whereby the stock is sorted by particle size and collected. Collected by collection equipment.

JP-A-8-39002

A sieving device such as the purifier described in Patent Document 1 does not have a function to monitor the vibration state of the sieve box during operation, and the swing angle and swing width of the sieve box are visually checked at the time of installation. adjusted to the proper value.
In addition, after the start of operation, maintenance personnel also visually checked whether or not the rocking state was properly maintained. Furthermore, the frequency of the sieve box was only set by the output frequency of the motor inverter.
However, in visual inspections, judgments differ depending on the person in charge, so even if there is an abnormality, it may be delayed to deal with it. An accident may occur. Also, if the vibrating motor fails, the stock will not spread evenly on the sieve, resulting in poor purifying performance.
Furthermore, since the vibration frequency of the vibrating part is not measured, the set value and the actual vibration 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 vibration state of the vibrating part, can quickly detect mechanical failures, vibration motor failures, etc., and prevents deterioration of the purification function by sieving. to provide.

The invention according to claim 1 of the present application is a sieving apparatus comprising a mount, and a vibrating unit that reciprocates in one direction in a plan view with respect to the mount and has a sieve frame, wherein the mount includes the vibrator. The screening device is installed on a base so as not to vibrate due to the reciprocating vibration of the part, and the sieving device has a first sensor having a vibrating part acceleration detection part capable of detecting at least the acceleration of the vibrating part in the vibrating part 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; and a gantry angular velocity detector capable of detecting the angular velocity of the gantry, wherein the vibration state measuring part measures the acceleration of the gantry detected by the second sensor unit. and angular velocity, the vibration state of the mount is measured based on at least one of the sifting apparatus.
In the invention according to claim 2 of the present application, the first sensor unit includes a vibrating portion angular velocity detection portion capable of detecting an angular velocity of the vibrating portion, and the vibration state measuring portion measures the vibration detected by the first sensor unit. 2. The sieving apparatus 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 is a sieving apparatus comprising a mount, and a vibrating unit that reciprocates in one direction in a plan view with respect to the mount and has a sieve frame, wherein the mount includes the vibrator. The screening device is installed on a base so as not to vibrate due to the reciprocating vibration of the unit, and the sifting device includes a base acceleration detection unit capable of detecting acceleration of the base on the base and an angular velocity of the base. a sensor unit having at least one of a gantry angular velocity detector, and a vibration state measuring part for measuring the vibration state of the gantry based on at least one of acceleration and angular velocity of the gantry detected by the sensor unit. A sieving device comprising:
The invention according to claim 4 of the present application is the sieving apparatus according to any one of claims 1 to 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 screening apparatus according to any one of claims 1 to 4, wherein the vibration state measured by the vibration state measuring unit is displacement.
In the invention according to claim 6 of the present application, the vibration state measuring unit can measure displacement in a direction perpendicular to at least one direction in which the vibration unit reciprocates, based on the acceleration detected by the vibration unit acceleration detection unit. The sieving apparatus according to claim 1 or 2, characterized in that:
The invention according to claim 7 of the present application is characterized in that the vibration state of the vibration unit measured by the vibration state measurement unit is the frequency of vibration in the one direction. It is a device.
The invention according to claim 8 of the present application is the sieving apparatus according to any one of claims 1 to 7, further comprising a display device for displaying the vibration state measured by the vibration state measuring unit. be.
The invention according to claim 9 of the present application has a display device for displaying the vibration state measured by the vibration state measurement unit, and the vibration state measurement unit can measure the installation angle of the mount as the vibration state. The sieving according to any one of claims 1 to 8, wherein the installation angle can be displayed on the display screen of the display device as an image imitating a spirit level. It is a device.
Further, as another invention, the following may be used.
Means 1 is a sieving device comprising a base and a vibrating portion that reciprocates in one direction in a plan view with respect to the base and has a sieve frame, wherein the sieving device includes at least the vibrating portion. Vibration for measuring the vibration state of the vibrating part based on the acceleration of the vibrating part detected by the first sensor unit, wherein the vibrating part is provided with a first sensor unit having a vibrating part acceleration detection part capable of detecting acceleration. and a state measuring unit.

In means 2 , the first sensor unit includes a vibrating part angular velocity detection part capable of detecting the angular velocity of the vibrating part, and the vibration state measuring part detects the angular velocity of the vibrating part detected by the first sensor unit. The sieving apparatus according to the means 1 , characterized in that the vibrating state of the vibrating portion is measured by the vibrating portion.

In means 3 , the gantry includes a second sensor unit having a gantry acceleration detector capable of detecting acceleration of the gantry and a gantry angular velocity detector capable of detecting the angular velocity of the gantry. The sieving apparatus according to means 1 or 2, wherein the unit measures the vibration state of the pedestal based on the acceleration and angular velocity of the pedestal detected by the second sensor unit.

Means 4 is the sieving apparatus according to Means 2 or 3, wherein the vibration state measured by the vibration state measuring unit is a vibration angle.

Means 5 is the screening apparatus according to Means 1 or 3, wherein the vibration state measured by the vibration state measuring unit is displacement.

The means 6 is characterized in that the vibration state measuring unit can measure displacement in at least a direction orthogonal to one direction in which the vibration unit reciprocates, based on the acceleration detected by the vibration unit acceleration detection unit. It is a sieving device according to means 5 .

Means 7 is the sieving apparatus according to Means 1 , wherein the vibration state of the vibrating portion measured by the vibration state measuring portion is the frequency of vibration in the one direction.

The means 8 is the sieving apparatus according to any one of the means 1 to 7, characterized in that the means 8 has a display device for displaying the vibration state measured by the vibration state measuring section.

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 proper range, and it is possible to promptly respond to machine failures, etc., and the sieving accuracy is improved. can also prevent a decrease in

In addition, a second sensor unit consisting of a gantry acceleration detector capable of detecting the acceleration of the gantry and a gantry angular velocity detector capable of detecting the angular velocity of the gantry is provided. It is possible to know the condition, the degree of transmission of vibration from surrounding machines, and the degree of shaking due to the hardness and softness of the ground on which the stand is installed and the base of the structure, etc., and suppress the deterioration of screening 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 vibrating unit acceleration detecting unit. The magnitude of vibration in the direction orthogonal to this can be accurately measured without being affected, and the abnormality detection accuracy is enhanced.

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 the occurrence of an abnormality can be easily noticed.

1 is a side view of a screening device showing a first embodiment of the present invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the screening apparatus which shows 1st Embodiment of this invention. It is a block diagram of a monitoring device and a first sensor unit according to a first embodiment of the present invention. 1 is a signal processing block diagram of a sifting device showing a first embodiment of the present invention; FIG. It is a figure which shows the example of a display of the monitoring apparatus in 1st Embodiment of this invention. It is a front view of a sieving device showing a second embodiment of the present invention. It is a block diagram of a monitoring device, a first sensor unit, and a second sensor unit according to a second embodiment of the present invention. It is a figure which shows the example of a display of the monitoring apparatus in 2nd Embodiment of this invention. It is a figure which shows the example of a display of the monitoring apparatus in 2nd Embodiment of this invention. It is the (A) side view and (B) front view which show the direction of the installation angle of the mounting frame of the screening apparatus in 2nd Embodiment of this invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, it cannot be overemphasized that this invention is not limited to embodiment.

[First embodiment]
1 to 5 show a first embodiment of the invention.
As shown in FIGS. 1 and 2, a sieving apparatus 1 of the present invention includes a pedestal 2 and a vibrating section 4 that reciprocally vibrates the pedestal 2 in one direction in a plan view and has a sieve frame 3 .
In the following description, the direction in which the vibration unit 4 reciprocates is the X direction (horizontal direction in FIG. 1, the depth direction in FIG. 2), and the direction orthogonal to the X direction in plan view is the Y direction (depth in FIG. 1). 2), and the direction perpendicular to the X and Y directions is referred to as the Z direction (vertical direction in FIGS. 1 and 2).

Supports 5 are provided at the four corners of the frame 2, and the vibrating section 4 is supported by rubber springs 6 attached to these supports 5. As shown in FIG.
A vibrating motor 7 is provided in the vibrating section 4, and by operating the vibrating motor 7, the vibrating section 4 reciprocates in the X direction.
The frame 2 is provided with a frame (not shown), and the frame is provided with a cover 30 . The pedestal 2, the frame, and the cover 30 do not reciprocate.
Reference numeral 8 designates a supply tube for supplying the granules before sieving into the sieve frame 3 from above.

In the sieve frame 3 of the vibrating part 4, a plurality of sieve screens with different meshes are stacked so that the meshes become finer toward the bottom.
The vibrating section 4 is provided with a collection device 9 that collects the granular materials that have passed through the sieve screens of the sieve frame 3 by grade, and the granular materials collected by the collection device 9 are taken out of the machine. In addition, the granules remaining on the sieve frame 3 are discharged out of the machine through another path.
Since the above structure is well known in the prior art, 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 section 4 .
As shown in FIG. 3, the first sensor unit 10 includes a vibration unit acceleration detection unit 11 capable of detecting acceleration of the vibration unit 4 in three axial directions, and a vibration detection unit 11 capable of detecting angular velocity of the vibration unit 4 in three axial directions. It has an angular velocity detector 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 section 14, a display device 16, an alarm buzzer 17, and the like.
Further, the vibrating portion acceleration detecting portion 11 and the vibrating portion angular velocity detecting portion 12, the display device 16, and the alarm buzzer 17 of the first sensor unit 10 are connected to the vibrating state measuring portion . Furthermore, the vibration state measuring unit 14 is connected to the operation management system of the facility via general-purpose external communication means.
The vibration state measurement unit 14 is an arithmetic processing unit, and measures vibration 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, 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 section 4 reciprocates, and the first sensor unit 10 starts detection.
The acceleration of the vibrating part 4 detected by the vibrating part acceleration detecting part 11 of the first sensor unit 10 and the angular velocity of the vibrating part 4 detected by the vibrating part angular velocity detecting part 12 are respectively detected by the vibration state measuring part through wireless communication or wired communication. sent to 14.

The vibration state measuring unit 14 measures the displacement of the vibrating unit 4 in the three axial directions and the vibration 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.
Displacement measurements are obtained by removing noise from the sensed acceleration and integrating twice to remove the effects of gravitational acceleration.
The vibration angle is calculated from the acceleration and angular velocity of the vibrating portion 4 using a Kalman filter, an extended Kalman filter, a Madgwick filter, a complementary filter, or the like.

The vibration state measuring unit 14 synthesizes waveforms from the measured displacements of the vibrating unit 4 in the X-axis direction, the Y-axis direction, and the Z-axis direction. As shown in FIG. The size and direction of the Lissajous figure on the XY axis (left figure in FIG. 5), the Lissajous figure on the XZ axis (center figure in FIG. 5), and the Lissajous figure on the YZ axis (FIG. 5). the figure on the right side of ).
Further, the displacement of the vibrating portion 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 XZ plane, Y- 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 on the screen of the display device 16 as numerical values.

In FIG. 5, the displacement is −4.48 to 4.48 mm in the X-axis direction, −0.02 to 0.01 mm in the Y-axis direction, and −0.47 to 0.47 mm in the Z-axis direction. The tilt angle in the XZ plane is 6.0°, the tilt angle in the XY plane is 0.0°, the tilt angle in the YZ plane is 0.0°, and the amplitude in the X-axis direction is 9.0°. 00 mm and the vibration frequency in the X-axis direction is 10.00 Hz, indicating stable operation.
As can be seen from these numerical values, 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. The reason why the inclination angle in the XZ plane is 6.0° is that the sieve frame 3 is inclined downward in the left direction of the paper as shown in FIG. It does not vibrate parallel to the vertical direction, but obliquely vibrates as indicated by the double-headed arrow in FIG.

Appropriate ranges of displacement, vibration angle, frequency, and amplitude of the vibrating portion 4 are set in advance as determination values in the vibration state measuring portion 14, and the vibration state measuring portion 14 measures the measured displacement and the displacement determination value. is compared, the measured vibration angle is compared with the angle criterion, the measured frequency is compared with the frequency criterion, and the measured amplitude is compared with the amplitude criterion.

When all the measured values of the vibration state measuring unit 14 are within the judgment value, the screen of the display device 16 displays the vibration state of the vibration unit 4 and indicates that the vibration state is normal, such as "Stable operation". Display in letters.
On the other hand, if these values deviate from the judgment values, abnormal processing is performed and the alarm buzzer 17 is activated, and the character display on the display device 16 is changed to "unstable", etc., and the operator or supervisor Notify the occurrence of anomalies.

[Second embodiment]
6 to 10 show a second embodiment of the 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 frame 2 is provided.

The second sensor unit 18 has a gantry acceleration detector 19 capable of detecting the acceleration of the gantry 2 and a gantry angular velocity detector 20 capable of detecting the angular velocity of the gantry 2 , similar to the first sensor unit 10 .
As shown in FIG. 7, the second sensor unit 18 is connected to the vibration state measurement 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 vibration state of the vibrating unit 4 in the first embodiment. Vibration of the pedestal 2 due to the influence of vibration, the hardness of the base on which the sieving device 1 is installed, etc. can be detected as a displacement.
Since the base 2 is originally fixed and is not affected by the reciprocating vibration of the vibrating portion 4 due to the rubber spring 6, the displacement and installation angle are normally measured, but the vibration 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 displays the vibration state of the vibration unit 4 on the screen of the display device 16 as shown in FIG. .
On the display screen of the display device 16, the displacement of the pedestal 2 is displayed as a Lissajous figure on the XY axes (the left figure in FIG. 8), a Lissajous figure on the XZ axis (the figure in the center of FIG. 8), which are orthogonal to each other. It is displayed as a Lissajous figure on the YZ axis (the figure on the right side of FIG. 8).
Also, the displacements of the gantry 2 in the X-axis direction, Y-axis direction, and Z-axis direction are displayed as numerical values.

In FIG. 8, the displacement is -0.10 to 0.10 mm in the X-axis direction, -0.02 to 0.01 mm in the Y-axis direction, and -0.02 to 0.02 mm in the Z-axis direction, which is normal. is displayed.
As shown by this numerical value, the pedestal 2 is hardly displaced, that is, the vibration of the vibrating portion 4 is not transmitted, and the rubber spring 6 is fully functioning.

The vibration state measuring unit 14 is set with a displacement within an appropriate range of the gantry 2 as a judgment value, and the vibration state measuring unit 14 compares the measured displacement with the displacement judgment value.
When all of the measured values of the vibration state measuring unit 14 are within the judgment value, the screen of the display device 16 displays characters such as "Normal".
When the measured value deviates from the judgment value, abnormality processing is performed to activate the alarm buzzer 17, and the character display on the display device 16 is changed from "normal" to "abnormal".
Even if the warning buzzer 17 is also activated, the operator or supervisor can immediately understand whether the malfunction is due to the vibrating section 4 or the pedestal 2 by looking at the character display.

Further, the vibration state measuring unit 14 converts the measured vibration state of the pedestal 2 into display information and sends it to the display device 16, and displays the information on the screen of the display device 16 together with the vibration state of the vibration unit 4 as shown in FIG. You can also make it work.
The installation angle of the gantry 2 is displayed on the display screen of the display device 16 as an image imitating a spirit level.

FIG. 9 shows the current state of the gantry 2 within a circular range in which the X-axis and the Y-axis are represented as a spirit level. The current state of the gantry 2 is indicated by a thick-line circle that simulates a bubble. The circle diameter of the two-dot dashed line indicates the allowable range. Also, 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° for the installation angle around the X axis and -0.4° for the installation angle around the Y axis. is shown to be normal.

FIG. 10 shows the direction of the installation angle of the gantry 2. As shown in FIG. As shown in FIG. 10A, the installation angle of the gantry 2 around the Y-axis is displayed as plus when the left side of the second sensor unit 18 is raised, and as minus when it is lowered. As shown in FIG. 10B, the installation angle of the gantry 2 around the X-axis is displayed as a positive value when the right side of the second sensor unit 18 is raised, and is displayed as a negative value when the right side is lowered.
By providing a display resembling a spirit level in this manner, the operator or supervisor can easily understand the installation state of the gantry.

Although not shown, the display device 16 is used as a touch panel, and in addition to the image imitating a spirit level, buttons with characters such as "calibration", "hold", and "reset" can be operated on the display screen. You may make it display.
For example, the "calibration" button is provided as a momentary switch so that the ON state is maintained while it is touched. Also, 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 after that can be measured.
By touching the "Hold" button, the displayed value of the installation angle of the gantry 2 can be stopped at an arbitrary timing. As a result, even if the measured installation angle value fluctuates from time to time and is difficult to see due to the vibration transmitted from the vibrating section 4 to the pedestal 2, 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 pedestal 2 can be returned to the factory default adjustment value of the vibration state measuring unit 14. FIG.
In this manner, by operating the display device 16 provided in the monitoring device 13 to adjust the vibration state measurement unit 14, adjustment when the vibration state measurement unit 14 is installed and periodic maintenance can be reduced. It is possible to greatly reduce the time and effort required.

Alternatively, the vibration state measuring unit 14 may be set with determination values for the displacement and installation angle within appropriate ranges of the pedestal 2, and the measured displacement and installation angle may be compared with the respective determination values for determination.
In this case, when all the measured values of the vibration state measuring unit 14 are within the judgment values, the screen of the display device 16 displays characters such as "Normal". When the measured value deviates from the judgment value, abnormality processing is performed to activate the alarm buzzer 17, and the character display on the display device 16 is changed from "normal" to "abnormal".
In this way, even if the alarm buzzer 17 is also activated, the operator or supervisor can immediately understand whether the malfunction is due to the vibrating section 4 or the pedestal 2 by looking at the character display.

[Other Modifications]
The present invention is not limited to the above embodiments. Examples include:

In the first embodiment, the vibration state measuring section measures all the vibration angle, displacement, vibration frequency, and amplitude of the vibrating section and displays them on the monitoring device, but it may be a part of them.
Vibration in one direction (X direction) in plan view of the vibrating part is not a big problem because it is the direction in which it should vibrate. , scattering of particles, mechanical failure, etc., the vibration state measuring unit measures only the displacement in the Y and Z directions, and the displacement in the X direction can be omitted without measuring the displacement. .
In order to prevent the granules on the sieve frame from spilling out, it is necessary to be cautious of the inclination angle in the XZ plane and the inclination angle in the YZ plane. It is also possible to set only appropriate tilt angles in the -Z plane and compare these angle determination values with the measured tilt angles in the XZ plane and the measured tilt angles in the YZ plane.

In a sieving device in which two vibrating motors 7 rotate in mutually opposite directions and the internal unbalanced weights synchronously vibrate in one direction (X direction) in plan view of the vibrating part, displacement in at least the Y direction If you pay particular attention to , you will be able to quickly discover problems such as synchronization problems between the two vibration 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 pedestal and displays them on the monitoring device. good. In this case, it is possible to monitor the frequency and amplitude of the vibration, so that it is possible to quickly discover that the vibration of the vibrating portion has been transmitted due to, for example, the breakage of the rubber spring.

In the present embodiment, the vibration state is measured when the vibrating section starts reciprocating, but the present invention is not limited to this. The monitoring device 13 may be operated to measure the vibration state. In this case, it is possible to measure the postures of the vibrating part and the stand when the vibrating part is stationary.

Although the first sensor unit is attached to the sieve frame of the vibrating section 4 in the present embodiment, the present invention is not limited to this. It can be anywhere as long as it vibrates.

In this embodiment, the monitoring device is attached to the cover of the sieving device, but the present invention is not limited to this. The sieving apparatus of the present invention also includes those equipped with such a monitoring device.

In the present embodiment, the installation angle of the gantry is displayed as a level as shown in FIG. 9, but it is not limited to this, and may be displayed as a numerical value similar to the displacement shown in FIG. For example, on the screen shown in FIG. 8, the same display as the "vibration angle" in FIG. 5 may be displayed as "installation angle" alongside "displacement (pp)".
Alternatively, an angle determination value may be set for the installation angle of the mount in the vibration state measurement unit, and the vibration state measurement unit may compare the measured installation angle with the angle determination value. In this case, when the measured installation angle is within the angle determination value, the screen of the display device may display "normal" or the like in the same manner as the displacement shown in FIG. Also, when the measured installation angle deviates from the angle judgment value, as in the case of displacement, abnormal processing is performed to activate the alarm buzzer, and the character display on the display device is changed from "normal" to "abnormal". and so on.

In the present embodiment, the measurement of the vibrating part and the pedestal is performed while the vibrating part of the sieving apparatus is in operation. In this case, it is possible to monitor the state of the installed posture immediately after installation and before operation, the posture at the time of shutdown, and the transmission of vibration from other sieving devices that are operated adjacently.

In this embodiment, in order to detect the vibration state of the vibrating portion, the vibrating portion acceleration detecting portion and the vibrating portion angular velocity detecting portion are provided, but the present invention is not limited to this. Only the vibration part acceleration detection part may be provided. 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.

It is good also as an example by applying each technical matter in any embodiment to other embodiments.

REFERENCE SIGNS LIST 1 screening device 2 pedestal 3 sieve frame 4 vibrating section 5 strut 6 rubber spring 7 vibrating electric motor 8 supply tube 9 collecting device 10 first sensor unit 11 vibrating section acceleration detecting section 12 vibrating section angular velocity detecting section 13 monitoring device 14 vibration state Measuring part 16 Display device 17 Alarm buzzer 18 Second sensor unit 19 Mount acceleration detector 20 Mount angular velocity detector 30 Cover

Claims (9)

A sieving apparatus comprising a pedestal and a vibrating unit that reciprocates in one direction in a plan view with respect to the pedestal and has a sieve frame,
The mount is installed on a base so as not to vibrate due to the reciprocating vibration of the vibrating unit,
The sieving device is
a first sensor unit having a vibrating part acceleration detection part capable of detecting at least acceleration of the vibrating part in the vibrating part;
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 second sensor unit having at least one of a gantry acceleration detector capable of detecting acceleration of the gantry and a gantry angular velocity detector capable of detecting an angular velocity of the gantry;
The vibration state measuring unit measures the vibration state of the gantry based on at least one of acceleration and angular velocity of the gantry detected by the second sensor unit.
A sieving device characterized by: The first sensor unit includes a vibrating portion angular velocity detection portion capable of detecting the angular velocity of the vibrating portion,
The sieving apparatus according to claim 1, wherein the vibration state measuring section measures the vibration state of the vibration section based on the angular velocity of the vibration section detected by the first sensor unit. A sieving apparatus comprising a pedestal and a vibrating unit that reciprocates in one direction in a plan view with respect to the pedestal and has a sieve frame,
The mount is installed on a base so as not to vibrate due to the reciprocating vibration of the vibrating unit,
The sieving device is
a sensor unit having at least one of a gantry acceleration detector capable of detecting acceleration of the gantry and a gantry angular velocity detector capable of detecting an angular velocity of the gantry;
a vibration state measuring unit that measures the vibration state of the gantry based on at least one of acceleration and angular velocity of the gantry detected by the sensor unit.
A sieving device characterized by: 4. The sieving apparatus according to claim 1, wherein the vibration state measured by the vibration state measuring unit is a vibration angle. 5. The sieving apparatus according to claim 1, wherein the vibration state measured by said vibration state measuring unit is displacement. 3. The vibration state measuring section is capable of measuring at least displacement in a direction perpendicular to one direction in which the vibrating section reciprocates, based on the acceleration detected by the vibrating section acceleration detecting section. A sieving device according to claim 1 or claim 2 . 3. The sieving apparatus according to claim 1, wherein the vibration state of the vibrating section measured by the vibration state measuring section is the vibration frequency in the one direction. 8. The sieving apparatus according to any one of claims 1 to 7, further comprising a display device for displaying the vibration state measured by said vibration state measuring unit. a display device for displaying the vibration state measured by the vibration state measuring unit;
The vibration state measuring unit can measure an installation angle of the pedestal as a vibration state, and can display the installation angle as an image simulating a spirit level on the display screen of the display device. The sieving apparatus according to any one of claims 1 to 8, characterized in that :

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