JP3013286B2 - Multi-stage sieving device for powders - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage sieving apparatus for sieving particles of ore, coal, coke, etc., in order to measure the particle size of the particles. Is stopped at a predetermined position, and the sieve is carried out by mechanical means such as a robot.

[0002]

2. Description of the Related Art A multi-stage sieving apparatus comprises a moving table type in which a sieve is set on a moving table having wheels, and the moving table is reciprocated. When the vertical axis is rotated, the sieve set on the shaking table is roughly divided into a low tap type that makes a circular motion in the horizontal direction by the action of the eccentric cam. There is also proposed a device provided with a sieve positioning mechanism for moving the sieve.

[0003] For example, as a moving stage type multi-stage sieving apparatus, as described in Japanese Patent Publication No. 3-80553, a moving frame main body which is movable on a base via wheels, and A shaking mechanism that vibrates the frame body, a support frame that stands vertically on the moving frame body, a sieve clamp mechanism provided on one side of the support frame, and a support on the moving frame body between the support frames. And a sieve positioning mechanism erected on the base. Then, the sieve positioning mechanism establishes a support base at a position sandwiching the sieve placed on the moving roller from both sides, and presses the sieve on the moving roller against the other side by driving the cylinder on one support base. A plate is provided, and the other support base is provided with a stopper against which the sieve pressed by the backing plate abuts.

[0004] A low tap type multistage sieving apparatus is
For example, as described in Japanese Patent Publication No. 3-80550, a vertical drive shaft is provided along one of a pair of pillars standing upright on a base and provided along the other of the pair of pillars. Vertical driven shaft, eccentric blocks fixed to the upper and lower parts of both shafts, an upper arm fitted to the upper eccentric block, a vibration table fitted to the lower eccentric block, and connected to the upper arm and the vibration table A sieve holding plate guided by the two vertical rods and moved up and down by a cylinder, and a sieve positioning mechanism erected from the base. Then, the sieve positioning mechanism erects a supporting frame on the base, and horizontally fixes four guide rods facing the front from both sides of the support on the front surface of the support frame. Is slidably fitted, a V-shaped backing plate is fixed to the front surface of the guide plate, and a cylinder is provided at the rear of the V-shaped backing plate. The V-shaped backing plate is advanced by the cylinder to align the sieve at a predetermined position. It is what we did.

[0005]

However, in the above-mentioned conventional multi-stage sieving apparatus, it is necessary to move the sieve to a predetermined position by driving the cylinder after the shaking operation of the sieve is completed. . Therefore, it takes time from the end of the shaking of the sieve to the state where the sieve can be carried out, resulting in poor work efficiency.

Also, the mechanical structure of the sieve positioning mechanism is complicated, and a great deal of labor and time must be spent on manufacturing. In addition, since the sieve is forcibly driven by driving the cylinder, failure of the cylinder or the like may occur. As a result, there is a concern about trouble of the entire apparatus.

Furthermore, in the conventional low tap type sieving apparatus, the hammer mechanism cannot be operated unless a predetermined number of sieves are constantly stacked on the shaking table to secure the height of the sieves. For this reason, there is a case where an unnecessary sieve is required to be superimposed as a spacer for the original sieving, and handling is troublesome.

[0008] Therefore, according to the present invention, when the shaking is completed, the sieve can be stopped at a predetermined position.
It is an object of the present invention to provide a multi-stage sieving apparatus capable of operating a hammer mechanism without superposing an extra sieve.

[0009]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and has a moving frame which is movable on wheels via wheels on a base ; a deceleration section for decelerating the rotation of the driving source, the rotational output of the deceleration portion, the movement and the motion converter for converting the reciprocating motion of one reciprocation, the reciprocating motion converted by said motion converter for one rotation a sieve clamping mechanism for clamping the sieve is placed on the movable frame in position relative to the moving frame; and a transmitting unit for transmitting the frame, and shaken mechanism for vibrating the mobile frame above stop the stop condition previously set by an external operation is satisfied the drive source based on the detection signal from the detection <br/> out mechanism; electrically and detected detecting mechanism a predetermined position of the rotating part of the motion converter Control device ; It is a multi-stage sieving device granular material, characterized in that it comprises a.

According to a second aspect of the present invention, there is provided a vertical drive shaft provided along one of a pair of columns standing upright on a base and a vertical drive shaft provided along the other of the pair of columns . and the driven shaft, an eccentric means which is fixed to the upper and lower portions of the two shafts, an upper arm fitted on top of the eccentric means, and a lower arm fitted at the bottom of the eccentric means, said lower arm integral with the horizontal Sieve pedestal that moves in the direction, a driving mechanism that rotationally drives the drive shaft by the rotational force of a driving source, a detection mechanism that electrically detects a predetermined position of a rotating portion of the driving mechanism, and preset by an external operation. When the stopped condition
Based on the detection signal from the detection mechanism is a multi-stage sieving device granular material, characterized in that it and a control device that allowed to stop the drive source.

[0011] as described in claim 3, in addition to the second aspect, and guided by the axis of the upright sieve cradle from the lower arm to enable lifting, was placed on the sieve pedestal sieve Is provided with a hammer mechanism for hitting.

[0012]

According to the sieving apparatus of the first aspect, the sieve stacked on the moving frame can be clamped at a predetermined position with respect to the moving frame by the sieve clamping mechanism. Is operated, the rotation of the drive source is converted into a reciprocating motion by the motion converting unit and transmitted to the moving frame, so that the moving frame repeats the reciprocating linear motion with the sieve mounted thereon. Then, when the moving frame is repeatedly reciprocated until the stop condition set in advance by the external operation is satisfied, the particles in the sieve are sieved. While the moving frame continues the reciprocating motion, the detection mechanism electrically detects a predetermined position of the rotating portion of the motion conversion unit, and a detection signal from the detection mechanism when a preset stop condition is satisfied by an external operation. The drive source is stopped based on. Therefore, the position where the moving frame stops is
The same predetermined position is obtained each time.

[0013] In sieving apparatus according to claim 2, when a drive shaft of the vertical provided to face on the base to one of a pair of posts erected driven to rotate by a drive source, the upper portion by the action of the eccentric means and the lower part the arm is rotated in the horizontal direction together with the sieve pedestal, thereby granule in sieve overlaid screened cradle is sieved. While the sieve receiving table is rotating, the detection mechanism electrically detects a predetermined position of the rotating portion of the drive mechanism, and based on a detection signal from the detection mechanism when a preset stop condition is satisfied by an external operation. Drive source stops. Therefore, the position where the sieve receiving stand stops is the same predetermined position every time.

According to the third aspect of the present invention, the sieve tray can be raised by being guided by the shaft erected from the lower arm, regardless of the number of sieves stacked on the sieve tray. By adjusting the height of the table, the uppermost sieve can be adjusted to the height of the hammer of the hammer mechanism.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a moving stage type multi-stage sieving apparatus 1, and FIG. 2 is a plan view of the multi-stage sieving apparatus 1.

A moving frame 2 as a moving table has wheels 3 and reciprocates linearly in the left and right directions in FIGS. 1 and 2 along a rail 5 on a base 4 by a shaking mechanism. On both sides of the moving frame 2, a sieve clamping mechanism for clamping the sieve 6 placed on the moving frame 2 at a predetermined position with respect to the moving frame 2 is fixed so as to be able to move up and down while being guided by the guide grooves 7. The fixing cylinder 8 is provided in the horizontal direction, and a fixing plate 9 is attached to the tip of the rod of the fixing cylinder 8. Further, on the moving frame 2, a sieve receiving table 10 is provided so as to be able to ascend and descend facing the lower ends of both fixed plates 9, and rods of an elevating cylinder 11 are connected to four corners of the sieve receiving table 10. is there.

Therefore, with the sieve tray 10 lowered, the bottomed dish-shaped receptacle 12 is first placed on the sieve tray 10, and
The sieves 6 are stacked on the dish-shaped receiver 12 in ascending order of mesh size. When the fixing cylinder 8 is operated in this state, the fixing plate 9 presses the sieves 6. Can be aligned. The stack of the sieves 6 may use a robot arm or the like. When the lifting / lowering cylinder 11 is operated, the sieve receiving table 10 moves up together with the sieves 6... When the uppermost sieve 6 acts on the ascending limit detector 13, the lifting / lowering cylinder 11 stops and maintains this raised state. I do. For this reason, if the hammer mechanism 14 is provided on the upper part of the moving frame 2, the
Regardless of the number, the sieve 6 can be hit by the hammer mechanism 14 by raising the sieve receiving table 10. In addition,
When the sieve receiving table 10 is raised, the fixing plate 9 and the fixing cylinder 8 are also raised by being guided by the guide grooves 7.

The shaking mechanism is arranged on one side of the base 4 and serves as a driving source having a built-in speed reducer as a speed reduction unit .
A brake motor with 15, a rotating shaft 16 of the motion converting section for converting the rotation of the brake with motor 15 into reciprocating motion, a rotating shaft 16 is converted to an reciprocating motion by one rotation force and the like the connecting rod 17 as a transmission unit for transmitting to the mobile frame 2 is configured to crank, and the output shaft of the motors 15-out with brake <br/> mounted on the motor base 18 of the rotating shaft portion 16 The input side is connected via a sprocket and a chain.

The rotating shaft 16 has a disk 20 having an amplitude adjusting plate 19 fixed to one end of a shaft supported by a bearing on the base 4, and a connecting rod 17 attached to the amplitude adjusting plate 19 slidable in a long groove 21. One end is attached to the shaft. In addition,
The other end of the connecting rod 17 is mounted on a bracket provided on one side of the moving frame 2. The amplitude adjustment plate 19
The inside of the long groove 21 formed in the diameter direction of the disk 20 is slidable. Therefore, when the amplitude adjustment plate 19 is slid to adjust the axial position of the connecting rod 17 to change the amount of eccentricity, the stroke of the linear reciprocating motion, that is, the amplitude of the moving frame 2 changes.

In addition, the above-mentioned shaking mechanism includes a rotation of a motion conversion unit.
A detection mechanism for electrically detecting a predetermined position of the portion is provided. In this embodiment, the detection mechanism fixes a magnetic detection plate 22 as an action portion on the outer periphery of the disk 20.
A reed switch for sensing the passage of the signal and transmitting a signal is fixed on the base 4 as a position detector 23. Therefore, when the disk 20 rotates and reciprocates the moving frame 2, the detection plate 22 operates each time the detection plate 22 passes over the position detector 23, whereby the position detector 23 sends out a detection signal. In addition, the time when the detection plate 22 acts on the position detector 23 is the same phase every time, in other words, the state where the moving frame 2 is at the same position. If the position of the moving frame 2 at this position is set to a predetermined position, Each time the moving frame 2 passes through the predetermined position, the position detector 23 sends out a detection signal. Therefore, when the operation of the motor 15 with brake is stopped and the disc 20 is stopped at the time when the position detector 23 sends out the detection signal, the moving frame 2 can be stopped at the predetermined position. The position at which the moving frame 2 stops is the same every time the moving frame 2 stops. If this position is set as a predetermined position, the positioning of the loading / unloading means such as the robot arm is reliably performed.

The detection mechanism is not limited to the combination of the magnetic detection plate 22 and the reed switch (position detector 23 ) , but may be a mechanism for detecting with an optical structure such as a photo sensor or a micro sensor. Although detection may be performed by a mechanical structure such as a limit switch, a contactless type is preferable if possible.

In general, when measuring the particle size of a granular material,
A predetermined time or a predetermined number of times is set, and the sieves 6 that have been stacked are continuously shaken during this time. When the set time or number of times is reached, the shaking is stopped. Therefore, if the predetermined time or the number of times is set as a stop condition in the control device, the shaking motion is terminated when the stop condition is satisfied, and the sieve 6 can be stopped at a predetermined position.

The control device 25 shown in FIG.
A setting time storing means 27 consisting mainly of, sends a motor stop signal to the detection when receiving a signal the motor control means 28 from the position detector 23 after receiving a time-up signal from the setting time storing means 27 stop Timing control means 29
When, the motor control means 28 receives the start signal and supplies power to a motor with a brake 15 to release the brake 30 with starting the brake-equipped motor 15, and sends a count start signal at the same time the timer 26 of the setting time storing means 27 The setting operation unit 31 for setting the shaking time by an external operation is connected to the set time storage unit 27.

When the start switch 32 is operated after setting the shaking time (for example, 15 minutes) in the set time storage means 27 by operating the setting operation section 31, a start signal is sent to the motor control means 28. Upon receiving the start signal, the motor control unit 28 controls the motor 15 with the brake.
And the brake 30 is released, and at the same time, a timing start signal is sent to the set time storage means 27. Therefore, the disk 20 of the shaking mechanism starts to rotate, and the moving frame 2 can be reciprocated linearly right and left from the predetermined position in the figure. Further, the set time storage unit 27 starts counting time when receiving the counting start signal.

When the disk 20 rotates, the magnetic detection plate 22
Is transmitted from the position detector 23 to the stop timing control means 29 each time the signal passes over the position detector 23, and the stop timing control means 29
The motor stop signal is not sent until a time-up signal is received from. Therefore, each time the disk 20 makes one rotation, the moving frame 2 performs a reciprocating linear motion once, and the disk 2
The moving frame 2 continues to reciprocate linearly while the 0 continues to rotate.

[0026] and, shaken time set in advance (for example 1
5 minutes) has elapsed from the setting time storing means 27 when the time-up signal is sent to the stop timing control means 29, the stop timing control means 29 receives the detection signal from the subsequent position detector 23, At this point, a motor stop signal is sent to the motor control means 28. When the motor control unit 28 receives a motor stop signal, the brake at this point
Per power supply to the motor 15 is stopped, thereby rotating the output shaft brake 30 is operated, i.e., to stop the rotation of the disk 20. Position from the detector 23 is sent to RIKEN detection signal by the action of the detection plate 22 to feed to the brake with motor 15 is stopped time, since these processes are performed by an electrical signal very short Time, the position detector 23
The moving length of the moving frame 2 after transmitting the detection signal is within a negligible range. Therefore, when the detection plate 22 of the disk 20 acts on the position detector 23 after the shaking time set in advance has elapsed, it is possible to stop the movable frame 2 to a predetermined position.

In this manner, when the screening by the shaking motion is completed and the stop position of the sieves 6 is a predetermined position, it becomes easy to grip the sieves 6 on the sieve receiving table 10 by a robot arm or the like. Therefore, the sieves 6 can be immediately and reliably gripped and carried out.

Reference numeral 33 in FIG. 3 denotes a stop switch. When the stop switch 33 is operated, a forcible stop signal is sent to the motor control means 28 to force the motor 15 with the brake regardless of the satisfaction of the stop condition. Can be stopped temporarily. Therefore, in an emergency or the like, by pressing the stop switch 33, the moving frame 2 can be immediately stopped.

Another embodiment of the control device 25 shown in FIG.
A set number memory unit 35 for storing the set vibration蘯回number (setting number), the counting means counts the reciprocation number of the mobile frame 2 receives the detection signal from the position detector 23 36
And the set number of the set number storage means 35 and the counting means 3
By comparing the sixth count, the count value reaches the set number of times the comparing means 37 for transmitting a motor stop signal to the motor control unit 28, with powering the brake with motor 15 receives a start signal brake motors The motor controller 28 is configured to start the motor 15 and release the brake 30. A setting operation unit 31 for setting the number of times of shaking by an external operation is connected to the set number storage 35.

When the start switch 32 is operated after the number of times of shaking (for example, 200 times) is set in the set number of times storage means 35 by operating the setting operation section 31, a start signal is sent to the motor control means 28. Upon receiving the start signal, the motor control unit 28 controls the motor 1 with the brake.
5, and the brake 30 is released.
Therefore, the disk 20 of the shaking mechanism starts to rotate, and the moving frame 2 can be reciprocated linearly right and left from the predetermined position in the figure.

When the disk 20 rotates, a detection signal is sent from the detector 23 to the counting means 36 and counted each time the detecting plate 22 passes over the position detector 23, and the counted value is sent to the comparing means 37. The number of times is compared with the set number (for example, 200 times) stored in the set number storage means 35. If the count value does not reach the set number of times, since the motor stop signal is not sent from the comparison means 37, the motor control means 28 continues to operate the motor 15 with the brake . Therefore, every time the disk 20 makes one rotation, the moving frame 2 becomes one.
The moving frame 2 performs a reciprocating linear motion while the disc 20 continues to rotate.

[0032] Then, when the counting means 36 counts up the detection signal from the position detector 23, reaches a shaking number of count value preset (for example, 200 times), the comparison means 37 at this point the motor The stop signal is the motor control means 2
8 is sent. When the motor control means 28 receives the motor stop signal, the power supply to the motor 15 with the brake is stopped at this time, whereby the brake 30 is operated to stop the rotation of the output shaft, that is, the rotation of the disk 20. Break detector 23 after sending the Riken detection signal by the action of the detection plate 22
The time to feed to the key with the motor 15 is stopped,
Since these processes are performed by electric signals, the process is extremely short, and the length of movement of the moving frame 2 after the position detector 23 sends out the detection signal is within a negligible range. Thus, by repeating only the moving mobile frame 2 is reciprocally shaking preset number of times, the detection plate 22 of the disk 20 in this last reciprocation acts on the position detector 23, stopping the movable frame 2 to a predetermined position Can be.

In this way, if the screening by the shaking motion is completed and the stop position of the sieves 6 is a predetermined position, the sieves 6 on the receiving table can be easily gripped by the robot arm or the like,
Therefore, the sieves 6 can be immediately and reliably gripped and carried out. In the drawing, reference numeral 33 denotes a stop switch. When operated during the sieving operation, a forced stop signal is sent to the motor control means 28, and the operation of the brake-equipped motor 15 is performed by the forced stop signal regardless of whether the stop condition is satisfied. Is stopped.

FIG. 5 is a front view of a low tap type multistage sieving apparatus 1 ', and FIG. 6 is a plan view of the multistage sieving apparatus 1'.

In this multi-stage sieving apparatus 1 ', two columns 40 are erected on the base 4 so as to face each other, and a boss is provided at the upper end of each column 40. A drive shaft 41 extending upward through the boss portion is rotatably mounted on the other support 40, and a driven shaft 42 is rotatably mounted on the other support column 40 in the same manner. The eccentric block 43 is fixed as an eccentric means to each,
The upper ends of the drive shaft 41 and the driven shaft 42 are supported by bearings 45 of an upper plate 44. The boss of the upper arm 46 is fitted around the outer eccentric block 43 of the drive shaft 41 and the driven shaft 42, and the lower eccentric block 4
The boss portion of the lower arm 47 is fitted around the outer periphery of 3. In addition,
The eccentric block 43 of the drive shaft 41 and the eccentric block 43 of the driven shaft 42 are set to the same phase.

In this embodiment, in order to move the stacked sieves 6 up and down, a pair of male screw shafts 49 are erected vertically from bearings 48 provided on the lower arm 47 and a bearing 50 provided on the upper arm 46 at the top. The upper plate 44 is rotatably supported, and the upper end is supported by a bearing 51 provided on the upper plate 44.
The output shaft of the elevating motor 52 and the upper part of one male screw shaft 49 are connected via a sprocket and a chain, and the lower parts of both male screw shafts 49 are connected via a sprocket and a chain. The two male screw shafts 49 are configured to rotate in synchronization with each other by the driving of. Then, the female screw portion 53 of the sieve receiving table 10 is
Screw.

Therefore, the dish-shaped receiver 12 is first placed on the screen 10 with the screen receiver 10 lowered, and the sieves 6 are stacked on the dish-shaped receiver 12 in order from the smallest mesh. In this state, when the raising and lowering motor 52 is operated to rotate both the male screw shafts 49 forward, the sieve receiving table 10 is raised together with the sieves 6 by the action of the female screw portions 53 screwed to the male screw shafts 49. When the upper sieve 6 acts on the ascent limit detector 13, the elevating motor 52 stops, and this ascent state is maintained. For this reason, regardless of the number of sieves 6 stacked on the sieve tray 10, the height of the sieve tray 10 is merely adjusted by rotating the two male screw shafts 49, and the uppermost sieve 6 is hammered by the hammer mechanism 14. 14 'height. In the drawing, reference numeral 54 denotes a column of the hammer mechanism 14 erected from the base 4, and a hammer 14 ′ extends from the upper end of the column 54 to the upper side of the sieve receiving table 10 in a substantially horizontal direction. It is constructed so that it can be beaten by 14 '.

A descent limit detector 55 is arranged near the lower portion of one male screw shaft 49. When the elevating motor 52 is rotated in the reverse direction to lower the sieve receiving pedestal 10, the sieve receiving pedestal 10 is lowered. Acting on the detector 55 stops the operation of the elevating motor 52,
The sieve tray 10 is configured to stop at a predetermined lower position.

The sieves 6 may be stacked using a robot arm or the like. When it is not necessary to raise and lower the stacked sieves 6,...
And the male screw shaft 49 need not be provided.

The base 4 mentioned above is intended to function as a speed reducer box constituting a part of the driving mechanism, provided with a decelerator for example a worm gear arrangement therein-out with brake the axis of the input-side worm gear motor The output shaft 15 is connected via a coupling 56, and the lower end of the drive shaft 41 is connected to the worm wheel on the output side. Motor 15-out with brake, which constitutes a part of the drive mechanism, in the present embodiment is attached to one end of the base 4. It is desirable that the speed reduction ratio of the speed reducer be set to an integer ratio such as 6: 1.

The drive mechanism has a predetermined position of the rotating part.
A detection mechanism for electrically detecting the position is provided. In this embodiment, the detecting mechanism fixes the detecting plate 22 to the outer periphery of the coupling 56 as an action portion, and detects a passage of the detecting plate 22 to transmit a signal to the position detector 23.
And fixed on the base 4. Therefore, when the coupling 56 is rotated to rotate the sieve receiving table 10 in the horizontal direction, the detection plate 22 operates every time the detection plate 22 passes over the position detector 23, whereby the position detector 23 sends out a detection signal. I do.

[0042] Since this in the embodiment are driven to rotate the drive shaft 41 is decelerated to one sixth of the reducer to the rotation of the motor 15-out with brake, coupling 56 in other words, 6
Drive shaft 41 is rotated 1 by rotating, since thereby the eccentric block 43 is 1 rotating sieve cradle 10 is 1 rotates, sieve cradle 10 is the position detector 23 sends out 6 times a detection signal It will be in the same position. Therefore,
This position is set as a predetermined position, and the detection from the position detector 23 is performed.
Counts outgoing signals and brakes when it reaches "6"
When the motor 15 is stopped, the sieve receiving table 10 can be stopped at a predetermined position. In short, the rotation of the input side of the speed reducer, which is different from the rotation speed of the drive shaft 41, is detected and the sieve receiving table 1 is detected.
0 to stop at a predetermined position, blade when counting the detection signal, it reaches the number of signals corresponding to the reduction ratio of the decelerator
The keyed motor 15 may be stopped.

In the same manner as in the above embodiment, when measuring the particle size of the granular material, a predetermined time or a predetermined number of times is set, and the sieves 6... Alternatively, stop the shaking exercise when the number of times has been reached. Therefore, if the predetermined time or the number of times is set as a stop condition in the control device, the shaking motion is terminated when the stop condition is satisfied, and the sieve 6 can be stopped at a predetermined position. .

The control device 25 shown in FIG.
Setting time storage means 27 mainly composed of
Has <br/> counters 57 for counting in response to the reduction ratio of the decelerator a detection signal from, receiving a count-up signal from the counters 57 after receiving a time-up signal from the setting time storing means 27 brake 3 and stop timing control means 29 for sending a motor stop signal to the motor control unit 28 receives the start signal and supplies power to a motor with a brake 15 with starting the brake-equipped motor 15
0, and at the same time, a motor control means 28 for sending a clock start signal to the timer 26 of the set time storage means 27. The set time storage means 27 has a setting for setting the shaking time by an external operation. The operation unit 31 is connected.

When the start switch 32 is operated after setting the shaking time in the set time storage means 27 by operating the setting operation section 31, a start signal is sent to the motor control means 28 and the start signal is received. The motor control means 28 supplies power to the brake-equipped motor 15 to start and release the brake 30, and at the same time, sends a clock start signal to the set time storage means 27. Therefore, the eccentric block 43 starts rotating and the sieve receiving table 10 can be rotated. Further, the set time storage unit 27 starts counting time when receiving the counting start signal.

When the motor with brake 15 is operated and the coupling 56 is rotated, the detection plate 22 is moved to the position detector 23.
Each time it passes above, the detection signal from the position detector 23 is counted.
Is sent to the speed reducer 57, and the counter 57
While you sends a count-up signal count stop timing control means 29, does not transmit a motor stop signal to the stop timing control means 29 receives a time-up signal from the setting time storing means 27 in accordance with the. Therefore, every time the coupling 56 makes six rotations, the sieve pedestal 10 performs a shaking motion together with the sieve 6... While the coupling 56 continues to rotate, the sieve pedestal 10 and the sieve 6. continue.

When a time-up signal is sent from the set time storage means 27 to the stop timing control means 29 after a preset time has elapsed, the stop timing control means 29 counts up the counter 57 thereafter. At this point, a motor stop signal is sent to the motor control means 28. When the motor control means 28 receives the motor stop signal, the power supply to the motor 15 with the brake is stopped at this time, whereby the brake 30 is operated and the coupling 5
6, the rotation of the drive shaft 41 is stopped. Position from the detector 23 is sent to RIKEN detection signal by the action of the detection plate 22 to feed to the brake with motor 15 is stopped time, since these processes are performed by an electrical signal very short a time, and since the rotation of the brake with motor 15 is transmitted at a reduced speed by the speed reducer, the range length position detector 23 moves the sieve 6 ... from then sends a signal detect negligible ones It is. Therefore, when the detection plate 22 of the coupling 56 acts on the position detector 23 after the elapse of a preset time, the sieve tray 10 and the sieve 6
... can be stopped at a predetermined position.

In this manner, when the screening by the shaking motion is completed and the stop position of the sieves 6 is a predetermined position, the sieves 6 on the receiving table can be easily gripped by the robot arm or the like.
Therefore, the sieves 6 can be immediately and reliably gripped and carried out.

The control device in the case where the number of times of shaking is set as the stop condition may have the same configuration as the control device 25 shown in FIG. 4. However, depending on the reduction ratio of the speed reducer, for example, 6-to-1, so the reduction ratio is to be compared with the set number preset count storage means 35 calculates the count value of the counting means 36 to one-sixth when comparing the comparison means 37 either, or set count storage The number of times set by the means 35 may be increased by six and compared, or a motor stop signal may be sent to the motor control means 28 when the count value reaches the set number.

[0050] Incidentally, the same rotating parts and the rotational speed of the drive shaft 41, may be provided a detection mechanism on the output side, such as a decelerator for example worm wheel, the motor 15-out with brake to the drive source
Using, when transmitted to the drive shaft 41 without decelerating the output of the brake with motor 15, the position detector
If the brake-equipped motor 15 is stopped when the detection signal is transmitted from 23 , the sieve receiving table 10 can be stopped at a predetermined position. In such a case, it is possible to stop the sieved screens 6 at a predetermined position by using the control device 25 of the first embodiment shown in FIG. 3 as it is.

The eccentric means is not limited to the eccentric block 43 or the eccentric cam, but may be a crank mechanism.

[0052]

As described above, according to the present invention, according to the first aspect, the predetermined position of the rotating portion of the motion conversion unit is electrically detected by the detection mechanism, and when the preset stop condition is satisfied, the detection mechanism is determined. Since the drive source is stopped based on the detection signal from, the moving frame can be stopped at the same position every time when the shaking motion ends. Therefore, if this position is set as a predetermined position, when the sieve is carried out by a carry-out machine such as a robot arm, the alignment between the carry-out machine and the sieve becomes easy, and the sieve can be reliably gripped.
In addition, since the step of moving the sieve to a predetermined position again after the end of the shaking motion becomes unnecessary, it is possible to immediately shift to the sieve unloading step if the sieve stops, eliminating wasteful time, Work efficiency can be improved.

Further, in the second aspect, the rotating portion of the drive mechanism
The predetermined position is electrically detected by the detection mechanism, and when a preset stop condition is satisfied, the drive shaft is stopped based on the detection signal from the detection mechanism to stop the shaking movement of the sieve receiving table. The platform can be stopped at the same position every time. Therefore, if this position is set as a predetermined position, when the sieve is carried out by a carry-out machine such as a robot arm,
Positioning of the unloader and the sieve is facilitated, and the sieve can be securely held. In addition, since the step of moving the sieve to a predetermined position again after the end of the shaking motion becomes unnecessary, it is possible to immediately shift to the sieve unloading step if the sieve stops, eliminating wasteful time, Work efficiency can be improved.

According to the third aspect, since the sieve tray can be moved up and down, regardless of the number of sieves stacked on the sieve tray, the height of the sieve tray can be adjusted and the uppermost sieve can be moved by the hammer mechanism. Can be adjusted to the height of the hammer. Therefore, it is not necessary to stack sieves that are not directly used for sieving as spacers, and the work can be streamlined.

[Brief description of the drawings]

FIG. 1 is a front view of a moving stage type multistage sieving apparatus.

FIG. 2 is a plan view of the moving table type multi-stage sieving apparatus shown in FIG.

FIG. 3 is a schematic block diagram of a control device that sets a shaking time as a stop condition.

FIG. 4 is a schematic block diagram of a control device that sets the number of times of shaking as a stop condition.

FIG. 5 is a front view of a low tap type multistage sieving apparatus.

6 is a plan view of the low tap type multistage sieving apparatus shown in FIG.

FIG. 7 is a schematic block diagram of another embodiment of the control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Moving stage type multistage sieving device 1 'Low tap type multistage sieving device 2 Moving frame 3 Wheel 4 Base 5 Rail 6 Sieve 8 Fixing cylinder 9 Fixing plate 10 Sieve receiving stand 11 Lifting cylinder 12 dish type receiver 14 hammer mechanism 15 positions the detector 25 the controller 26 a timer 27 setting time of the detection plate 23 detecting mechanism as a function of the-out with a brake motor 16 rotates the shaft portion 17 connecting rod 19 the amplitude adjusting plate 20 disc 21 elongated groove 22 detecting mechanism Storage means 28 Motor control means 29 Stop timing control means 30 Brake 31 Setting operation part 32 Start switch 33 Stop switch 35 Set number of times storage means 36 Counting means 37 Comparison means 40 Post 41 Drive shaft 42 Followed shaft 43 Eccentric block 46 Upper arm 47 Lower part Arm 49 Male Axis 52 lifting motor 56 coupling

Claims (3)

(57) [Claims] 1. A moving frame which is movable on a base via wheels ; a deceleration unit for decelerating the rotation of a driving source ; and a rotation output of the deceleration unit is converted into one reciprocating motion for one rotation. a motion converter for converting the reciprocating motion converted by said motion converter and a transmission unit that transmits to the <br/> mobile frame, shaken mechanism for vibrating the mobile frame and, the movement on the frame a sieve clamping mechanism for clamping in place the placement was screened against the moving frame; a detecting mechanism for electrically detecting a predetermined position of the rotating part of the motion converter; stop preset by an external operation multistage sieving apparatus granular material, characterized in that it comprises a; condition control device and allowed to stop the drive source based on when the established detection signal from the <br/> detection mechanism. 2. A vertical drive shaft provided along one of a pair of pillars standing upright on a base, a vertical driven shaft provided along the other of the pair of pillars, and both of these shafts. an eccentric means which is fixed to the upper and lower portions, and an upper arm fitted on top of the eccentric means, and a lower arm fitted at the bottom of the eccentric means, sieve moves to the lower arm integrally with the horizontal receiving table When a driving mechanism for rotationally driving the drive shaft by the rotational force of the driving source, and electrically detected to detect mechanism a predetermined position of the rotating part of the drive mechanism, the stop condition set in advance by an external operation is established above <br/> multistage sieving apparatus granular material, characterized in that it and a control device that allowed to stop the drive source based on the detection signal from the detection mechanism. 3. A sieve cradle is guided by a shaft erected from the lower arm to enable lifting, claim 2, further comprising a hammer mechanism for tapping the sieve was placed on the sieve pedestal 2. A multi-stage sieving apparatus for granular materials according to 1.).