JPH08182964A - Screen vibrating device of screen - Google Patents

Abstract

PURPOSE: To smoothly drop small particles which have passed through a screen by increasing the impact applied on the screen to prevent the occurrence of clogging, and reducing an obstacle under the screen. CONSTITUTION: A screen 14 made of wire net is spread on the inside of a screen frame 10, and the screen frame 10 is installed so that the screen 14 may be somewhat inclined forward downword. Under the screen 14, plural oscillating bars 21, 22 which are long in the width direction are installed vertically oscillatably and separately from each other in the longitudinal direction of the screen 14. To each of both ends of the respective oscillating bars 21, 22, a driving means consisting of links 21a, 22a, 26, 28... for vertically oscillating the oscillating bars is connected. To the respective oscillating bars 21, 22, plural hammers 23 for striking the rear of the screen 14 on rising of the bars are fixed by leaving arbitrary intervals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieve vibrating device of a sieving machine used for sieving solid particles.

[0002]

2. Description of the Related Art For example, as a sieving machine for sieving sand-like bodies and other powders and granules obtained by crushing a cake produced when river water or factory wastewater is filtered by a filter press, A wire mesh sieve is attached to the sieve frame in a substantially flat shape, and this sieve is slightly inclined forward and downward to give a reciprocating or closed-curve vertical vibration to the entire sieve frame, while the powder to be processed at the rear of the sieve. It is known that small particles are dropped into a pan under a sieve while large particles are slid in front of the sieve and discharged from the front end of the sieve onto a conveyor below the granules. .

As a cleaning device for preventing clogging of the sieve, a large number of wire mesh gutters long in the width direction are fixed to the lower surface of the sieve at predetermined intervals, or a sieve surface is provided on the lower side of the sieve. A grid is provided in parallel, the space between the sieve and the grid is divided by a net in the width direction to form a number of gutters that are long in the width direction, and a large number of spheres are placed in the gutter in advance and this sphere is sieved. It is known that the powder is repelled by the vibration of the above and collided with the lower surface of the sieve so that the powder particles adhering to the sieve are dropped by the impact caused by the collision of the spheres.

[0004]

However, the conventional cleaning device relies on the vertical vibration for sieving to repel the sphere, and the impact of the sphere on the sieving surface causes the vibration frequency and amplitude of the sieve. Since it is dominated by the above, it is not possible to strengthen the above impact, and therefore, when the granular material contains moisture or moisture and strongly adheres to the wire mesh that constitutes the sieve, the granular material attached to the sieve is Grew gradually without dropping off, resulting in clogging. Further, since the lower side of the sieve is covered with the gutter or the lattice, there is a problem that small particles passing through the sieve adhere to the gutter or the lattice.

According to the present invention, the impact is strengthened by hitting the lower surface of the sieve with a lifting member that is mechanically moved up and down, and even if the granular material is strongly attached to the sieve due to moisture or the like, the falling of the granular material is ensured. This prevents clogging and eliminates the conventional wire mesh gutters and grids provided on the lower side of the sieve, and enables small particles to pass smoothly through the sieve.

[0006]

[Means for Solving the Problems] In the first means for solving the above problems, a wire mesh sieve is placed inside a sieving frame, and the sieving frame is installed so that the sieving is slightly inclined forward and downward. A plurality of rocking bars are provided below the sieve so as to be vertically rockable, and drive means for vertically rocking the rocking bars are connected to both ends of each of the plurality of rocking bars. A plurality of rocking bars are configured to hit the lower surface of the sieve when the rocking bar rises.

In the second means, a sieve made of wire mesh is attached to the inside of the sieving frame, and the sieving frame is installed such that the sieving is slightly inclined forward and downward. Of the plurality of swing bars are connected to driving means for swinging the swing bars up and down. Then, a plurality of hammers capable of hitting the lower surface of the sieve at the time of ascending each of the plurality of swing bars are fixed at arbitrary intervals.

Both the first means and the second means are for vibrating by hitting the lower surface of the sieve from below, and the sieving frame itself is the same as the conventional vibrating sieving machine. It may be attached to the machine base frame via a vibrator for swinging the machine up and down.Unlike the conventional vibrating and sieving machine, it can be placed directly on the machine base frame without the vibrator. It may have been done. In other words, the sieve vibrating device of the present invention may be provided additionally to the vibrator of the conventional vibrating screener, or may be provided in place of the conventional vibrator.

In the above first and second means, the shape of the sieving frame can be formed in any shape such as square, rectangle and circle. It is preferable to install so that the granular material slides down in parallel with the side. Further, the rocking bar may be any one as long as it is dispersed at a plurality of locations on the lower surface of the sieve and hit, and the direction of the rocking bar may be parallel to or perpendicular to the direction in which the granular material slides. Then, in the first means, the swing bar itself is configured to directly strike the lower surface of the sieve, and in the second means, the swing bar strikes via a hammer for striking fixed to the swing bar. Is configured as follows.

The above-mentioned hammer can be formed of iron, light metal or other metal, wood, synthetic resin, hard rubber or the like, but an elastic body such as hard rubber or urethane is particularly preferable because it does not damage the sieve. . Also, the shape is, if it can hit the lower surface of the sieve,
Any shape such as a sphere, a cylinder, a disc, a cone, a pyramid, or the like can be used. Then, a cap made of the elastic body is attached to the top of a hard hammer made of metal or the like to mitigate the impact when hitting the lower surface of the sieve.

In the first and second means described above, a plurality of rocking bars are arranged below the sieve in place of the conventional gutters or lattices, but the plurality of rocking bars are rocked at the same cycle. In addition, the plurality of rocking bars are divided into a plurality of groups, the rocking cycles of the rocking bars of each group are sequentially shifted little by little, and the lower surface of the sieve is a rocking bar belonging to the first group, a second group. Can be alternately hit with the rocking bar belonging to the group 3 and the rocking bar belonging to the third group. In this case, when the rocking bar of a certain group acts and the rocking bar of another group acts, Since the magnitude and direction of the vibration generated at any one point on the sieve are different, the powder particles attached to the sieve will be more easily peeled off and clogging will occur, compared to the case where all swing bars are operated in the same cycle. Hard to do. However, practically, the plurality of rocking bars are divided into two groups, and the rocking cycle is alternately hit by the rocking bars belonging to the first group and the rocking bars belonging to the second group on the lower surface of the sieve. It is preferable to set as follows.

In the first and second means, the lower end of the connecting rod connected to both ends of the swing bar and extending downward is used as a driving means for swinging the swing bar up and down. By connecting to the tip of a crank arm having a fulcrum, a slider / crank mechanism is constructed in which the end of the rocking bar is a vertical reciprocating slider, and the tips of a plurality of crank arms arranged in the front-rear direction are arranged in the front-rear direction. An example is a link mechanism in which long side bars are connected and both ends of the side bars are driven by motors to rotate via cranks. Then, a damper such as a spring is provided between the hammer and the driving means thereof, for example, between the hammer and the rocking bar, or between both ends of the rocking bar and the connecting rod, etc. The impact when the bar hits the bottom surface of the sieve can be mitigated. The crank arm for each swing bar may be omitted, but the side bar is reinforced by providing the crank arm.

[0013]

In the first means, when the rocking bar is rocked in the vertical direction, the rocking bar directly hits the lower surface of the sieve.
The position where the impact is applied is determined by the arrangement of the rocking bars, and the strength and cycle of the hitting are determined by the amplitude and cycle of the rocking motion of the rocking bar. By setting according to the type, it is possible to reliably separate and drop the powder or granules attached to the sieve.
On the other hand, in the second means, when the rocking bar is rocked in the vertical direction, the rocking bar hits the lower surface of the sieve via the hammer. Then, the position where this impact is applied is determined by the arrangement of the rocking bars and the arrangement of the hammers on the rocking bar,
The striking strength and the cycle are determined by the amplitude and the cycle of the rocking motion of the rocking bar as in the case of the first means. Therefore, by setting these according to the type of powder or granular material to be processed, The powder and granules attached to the sieve can be reliably peeled off and dropped.

In any of the first means and the second means, since the screen is vibrated by a drive system different from the vibrator for vibrating the entire sieving frame in the conventional vibrating sieving machine, the sieving is performed. The vibration applied by the bar facilitates sieving. Therefore, the conventional vibrator can be omitted depending on the type of the granular material to be treated. Further, in the first means, only a plurality of rocking bars are arranged below the sieve, and in the second means, hammers are added to the rocking bars. Since there is no gauze or grid made of wire mesh that covers the entire lower side of the sieve, it is easy for small particles to pass through the eyes of the sieve. Moreover, since the swing bar is a vibrating body, the small particles that have passed through the sieve do not adhere to them.

[0015]

EXAMPLE In FIGS. 1 and 2, the sieve frame 10 is
The front plate 11, the rear plate 12, and the left and right side plates 13 are formed into a rectangular cylindrical shape, and a wire mesh sieve 14 is stretched substantially flat inside thereof, so that the sieve 14 inclines slightly forward ( The sieving frame 10 is installed on a machine frame (not shown) of a sieving machine so as to be vertically swingable via a spring so that the front plate 11 side is lower than the rear plate 12 side. It is adapted to vibrate up and down (not shown). Then, a discharge port 11a is opened in the upper portion of the front plate 11 where the sieve 14 is attached, and a chute 15 is fixed to the discharge port 11a, and on a pair of front and rear rails 16 laid on the floor F below. A flat box-shaped carriage 17 is mounted via wheels 18. Therefore, the granules K to be treated, which are put into the rear part of the sieve 14, are sieved by the vibration of the sieving frame 10, and the small particles P in the granules K pass through the sieve to form a box-like shape below. The large particles R that have fallen onto the carriage 17 and cannot pass through are discharged from the discharge port 11a of the front plate 11 and the chute 15.
It is discharged to the front through.

On the left and right side plates 13 of the sieving frame 10,
A plurality of vertical guide grooves 13a are provided below the mounting portion of the sieve 14 at predetermined intervals in the front-rear direction, and swing bars 21, 22 long in the width direction are provided in the left and right opposing guide grooves 13a. One by one, and both ends thereof are inserted so as to project to the outside of the side plate 13, and a plurality of spherical hammers 2 are provided at the inside of the side plate 13 of each swing bar 21, 22.
3 are dispersed and fixed. However, the above swing bar 2
1 and 22 are divided into two groups, one rocking bar 21 has relatively short connecting rods 21a at both ends, and the other rocking bar 22.
Has relatively long connecting rods 22a at both ends thereof facing downward, and these two types of rocking bars 21 and 22 are alternately inserted into the guide grooves 13a arranged in a line in the front-rear direction.

The respective lower ends of the connecting rods 21a and 22a are connected to the tip of a crank arm 25 having a fulcrum 24 in the downward extension of the side plate 13, and one of the swing bar 21, the connecting rod 21a and the crank arm. 25 is a pair of reciprocating slider / crank mechanism and the other swing bar 2
2, the connecting rod 22a and the crank arm 25 constitute another set of reciprocating slider / crank mechanisms, and the rotation of the crank arm 25 causes the rocking bars 21 and 22 to rock up and down, respectively, and the hammer 23 moves up when the rocking bars 21 and 22 ascend. Sieve 1
The lengths of the connecting rods 21a and 22a and the crank arm 25 are set to such an extent that the lower surface of 4 is hit.

The lower ends of the connecting rods 21a of the first group arranged in one row in the upper stage are connected to each other by the side bars 26 which are long in the front-rear direction, and the lower ends of the connecting rods 22a of the second group arranged in one line in the lower stage are the same. Are connected to each other by a side bar 26. On the other hand, two crankshafts 27, which are long in the width direction, are respectively arranged in two steps in the upper and lower portions of the front lower portion and the rear lower portion of the sieving frame 10 so as to be rotatable on a supporting frame (not shown) integrated with the sieving frame 10. Mounted. And
Crank discs 28 are fixed to both ends of the four crank shafts 27 in the front, rear, upper, lower, front and rear upper crank discs 28, and the front and rear lower crank discs 28, 28 are fixed to each other. The lower side bars 26 are connected to each other, and two sets of upper and lower parallel crank mechanisms are formed on the lower left and right sides of the sieving frame 10, respectively.

In the above structure, the swing bar 2 of the first group
When 1 is located at the top dead center, the phases of the upper crank disk 28 and the lower crank disk 28 are set to be 180 degrees out of phase so that the swing bar 22 of the second group is located at the bottom dead center. When the upper and lower crankshafts 27 are driven by a motor to rotate at the same speed, the hammer 23 on the rocking bar 21 belonging to the first group and the hammer 23 on the rocking bar 22 belonging to the second group.
Alternately hit the lower surface of the sieve 14 and give strong vibration to the sieve 14. Therefore, the powder or granules K are less likely to adhere to the sieve 14 and the adhered powder or granules K are easily peeled off to prevent clogging.

The sieving frame 10 and the crankshaft 27
When the support frame of the above is integrally formed and the whole thereof vibrates up and down with respect to the machine frame by the action of the vibrator different from the crankshaft 27, the vibration due to the vibrator and the vibration due to the impact of the hammer 23 are generated. Synthesized,
The sieve 14 vibrates by the synthetic vibration, and the powder K is sieved. Further, when the sieving frame 10 is placed on the machine frame and the vibrator is omitted, sieving is performed only by the vibration due to the rotation of the crankshaft 27. Then, in any case, the small particles P pass through the eyes of the sieve 14 and are thrown into the box-shaped cart 17 below, and the large particles R proceed forward on the sieve 14 and are discharged through the discharge port 11 a and the chute 15. To be done. And
When the box-shaped carriage 17 is filled with the small particles P, it is extruded laterally along the rail 16 and is replaced with an empty box-shaped carriage 17.

The swing bar 31 shown in FIG. 3 is formed of a square rod, and penetrates a disc-shaped hammer 32 in the diameter direction and is fixed by fitting. A vertical connecting rod 36 is connected to both ends of the swing bar 31 via a shaft coupling 33, an L-shaped bending bar 34, and a compression coil spring 35. However, the compression coil spring 35 is mounted between the stopper 34a fixed to the downward vertical portion of the bending bar 34 and the stopper 36a fixed near the upper end of the connecting rod 36. Two types of connecting rods 36 are prepared, a short one for the first group and a long one for the second group, and the tip ends of the crank arms 25 are connected to the respective lower ends thereof. This example corresponds to the connecting rod 21a or 22a in FIG. 1 with a damper interposed, and the impact of hitting the lower surface of the sieve 14 is alleviated by the compression of the compression coil spring 35.

The hammer 38 shown in FIG. 4 is formed in a disk shape in the same manner as above, but the swing bar 31 penetrates through the center thereof in the thickness direction. The hammer 39 shown in FIG. 5 is one in which the apex of the pyramid is formed into a spherical surface. The hammer 40 shown in FIG. 6 has a hemispherical head portion 40a and a cylindrical body portion 4a.
0b, and the rocking bar 31 is vertically movably inserted into the vertical holes 40c provided on the left and right of the body 40b, and between the rocking bar 31 and the inner surface of the top of the head 40a. A compression coil spring 41 is mounted, a connecting shaft 42 is inserted into the compression coil spring 41 from below the rocking bar 31, the tip of the connecting shaft 42 is fixed to the inner surface of the top of the head 40a, and a stopper 42a at the lower end of the connecting shaft 42 is attached. Is locked to the lower surface of the swing bar 31. In this case, since the compression coil spring 41 inside the hammer 40 functions as a damper that absorbs the impact at the time of impact, the compression coil spring 35 in FIG. 3 can be omitted.

FIG. 7 shows an embodiment in which the sieve 14 is stretched in an arch shape so that the center portion in the width direction is slightly higher than both ends. That is, a plurality of horizontal stays 46 connecting the left and right side plates 13 of the sieving frame 10 below the sieving 14 are connected.
Are provided at predetermined intervals, and a central support bar 47 that is long in the front-rear direction and that is relatively tall in the widthwise central portion straddling these lateral stays 46, and relatively short side support bars 47 on both sides thereof. 48 are fixed respectively, and the sieve 14 is placed on these support bars 47, 48,
Both left and right ends thereof are fixed to the inner surface of the side plate 13 via metal fittings 49, and by this fixing, the sieve 14 is tensioned in the width direction and held in an arch-shaped cross section.

Then, in this embodiment, FIG. 1 and FIG.
In the same manner as in the embodiment described above, the first group of swing bars 21 and the second group of swing bars 22 formed in a straight line in the width direction are alternately arranged in the front-rear direction. Each of the two types of hammers 40A of different height in the mold of FIG. 6,
40B are fixed alternately. That is, a tall hammer 40A is fixed near the center of the swing bar 21 of the first group, and a short hammer 40B is fixed near the side plate 13, and the distance from each top of the hammers 40A and 40B to the sieve 14 is fixed. Equally set. Similarly, a tall hammer 40A is fixed near the center of the swing bar 22 of the second group, and a short hammer 40B is fixed near the side plate 13, respectively, and the distance from each top of the hammers 40A, 40B to the sieve 14 is increased. Are set equal. Therefore, when the rocking bar 21 of the first group is raised, the two types of hammers 4 above it are arranged.
0A and 40B simultaneously strike the lower surface of the sieve 14, and when the swing bar 22 of the second group rises, two types of hammers 40A and 40B above it strike the lower surface of the sieve 14 at the same time. Impact of hammer 40A, 40B
It is relaxed by the built-in compression coil spring 41.

The embodiment of FIG. 8 is similar to the embodiment of FIG. 7 in that the sieve 14 is stretched in an arch shape so that the center portion in the width direction is slightly higher than both ends. The movable bar 21 and the swing bar 22 of the second group are each formed in an upward convex arc shape. And these swing bars 2
6, a plurality of hammers 40 having the same height are fixed to the molds 1 and 22, and when the swing bar 21 of the first group is raised,
All the hammers 40 on it are configured to simultaneously strike the lower surface of the sieve 14, and when the swing bar 22 of the second group is raised, all the hammers 40 on it are configured to strike the lower surface of the sieve 14 at the same time. The impact at the time of impact is mitigated by the compression coil spring 41 built in the hammer 40.

FIGS. 9 and 10 show an embodiment in which the sieve is directly hit with a swing bar. In the embodiment of FIG. 9, a large protrusion 51a is integrally formed in the center of a swing bar 51 made of a plate, and small protrusions 51b are integrally formed on the left and right sides to form a hammer. The protrusions 51a and 51b are made of rubber. A cap can be applied. Note that FIG. 9 shows a state in which the swing bar 51 is lifted up and hits the lower surface of the sieve 14, and the chain double-dashed line 14 a shows the stationary position of the sieve 14. Further, 52 is a connecting rod. On the other hand, in FIG. 10, a bar bent into an Ω shape is used as a swing bar 55, and the central horizontal portion 55a hits the lower surface of the sieve 14 when the bar rises, and the central horizontal portion 55a is a straight line. It may be formed in either a shape or an arc shape that is convex upward as shown. The rocking bars 51 and 55 can be arranged in two groups as in the example of FIGS. 1 and 2, and the rocking bar 51 of FIG. 9 has the sieve 14 as shown in FIGS. It can also be used when stretched in an arch shape.

[0027]

As described above, according to the first aspect of the present invention, a plurality of rocking bars long in the width direction are provided below a wire mesh sieve stretched over a sieve frame so as to be vertically rockable. By swinging these swing bars up and down, each swing bar hits the lower surface of the sieve,
A conventional sieve cleaning device, for example, a large number of spheres are accommodated on a gutter or lattice fixed on the lower side of the sieve, and the vibration of the sieving frame is used to bounce these spheres to collide with the lower surface of the sieve. Compared to the above, it is possible to surely hit the lower surface of the sieve, and to increase the impact on the sieve, so that even if the powder or granules to be treated are likely to adhere to the sieve, it becomes difficult to adhere, Further, the temporarily adhered powder and granules are easily peeled off, and clogging is greatly reduced.

Further, a plurality of rocking bars are only dispersedly arranged on the lower side of the sieve, and a conventional cleaning device is provided with a grate or a grate made of wire mesh so as to cover the entire lower surface of the sieve. Compared with, the number of obstacles on the lower side of the sieve is reduced, so that the small particles passing through the sieve can be easily dropped. Since the swing bar hits the lower surface of the screen to vibrate the screen, it is possible to additionally install a screen vibrating device including the above-mentioned hammer in a vibrating screen machine configured to vibrate the entire screen by a vibrator, It is also possible to omit the vibrator of the conventional vibrating and sieving machine and perform sieving only by the vibration of the sieving caused by the impact of the rocking bar.

In the invention described in claim 2, a plurality of hammers are fixed to the swing bar of the invention described in claim 1,
Since the lower surface of the sieve is hit with this hammer, the impact is surely applied to the lower surface of the sieve to increase the impact on the sieve, as in the invention according to claim 1.
Sieve clogging can be greatly reduced, small particles that have passed through the sieve can be easily dropped, and a conventional vibrating and sieving machine can be additionally equipped with a sieving vibrating device including the above hammer. Also, the vibrator of the conventional vibrating and sieving machine can be omitted.

According to a third aspect of the invention, in the invention according to the first or second aspect, the sieving frame is attached to the machine frame through a vibrator for vertically swinging the entire sieving frame. Therefore, the sieve can be vibrated by the combined vibration of the vibration applied by the vibrator and the vibration applied by the impact of the hammer or the swing lever, the efficiency of sieving is improved, and the clogging is further reduced.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the sieving frame is mounted on a machine frame, and the sieving is performed like a conventional vibration sieving machine. Since the entire frame is not vibrated but only the sieve is vibrated, the energy required for vibrating the sieve can be saved.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the plurality of rocking bars are divided into two groups, and a hammer and a hammer on the rocking bars of the first group are provided. Since the lower surface of the sieve is alternately hit with the hammer on the swing bar of the second group, the magnitude and direction of vibration applied to any one point on the sieve changes, and clogging is prevented more effectively. To be done.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, a damper is provided at an arbitrary position between the hammer or the swing bar and its driving means. Therefore, the impact applied to the sieve can be mitigated, and the damage to the hammer drive system and the sieve can be reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.

2 is a cross-sectional view of FIG.

FIG. 3 is a front view of a modification of the swing bar.

FIG. 4 is a front view showing a modified example of the hammer.

FIG. 5 is a front view showing another modification of the hammer.

FIG. 6 is a front view showing still another modification of the hammer.

FIG. 7 is a transverse cross-sectional view of an embodiment in which a sieve is stretched in an arch shape in section.

FIG. 8 is a cross-sectional view of another embodiment in which a sieve is stretched in an arch shape in section.

FIG. 9 is a transverse cross-sectional view of an embodiment in which a protrusion is integrally formed on a swing bar.

FIG. 10 is a cross-sectional view of another embodiment in which a protrusion is integrally formed on a swing bar.

[Explanation of symbols]

K: powder granules P: small particles R: large particles 10: sieve frame 14: wire mesh sieve 17: box dolly 21, 22, 31, 51, 55: rocking bar 21a, 22a, 36: connecting rod 23 , 32, 38, 39, 40, 40A, 40B: hammer 24: fulcrum 25: crank arm 26: side bar 27: crank shaft 28: crank disk 35, 41: compression coil spring

Claims (6)

[Claims] 1. A sieve made of wire mesh is stretched inside a sieving frame, the sieving frame is installed so that the sifter is slightly inclined forward and downward, and a plurality of oscillating bars are vertically oscillated below the sieving frame. Freely provided, drive means for vertically swinging the rocking bars are connected to both ends of the rocking bars, and the rocking bars strike the lower surface of the sieve when the rocking bars are raised. A sieving vibrating device for a sieving machine, which is characterized in that 2. A sieve made of wire mesh is attached to the inside of the sieving frame, the sieving frame is installed such that the sieving is slightly inclined forward and downward, and a plurality of swing bars extending in the width direction are provided below the sieving. Are provided so as to be vertically swingable and dispersed in the front-back direction of the sieve, and drive means for vertically swinging the swing bar is connected to both ends of each of the plurality of swing bars. A sieve vibrating device for a sieving machine, characterized in that a plurality of hammers capable of hitting the lower surface of the sieve at the time of ascending to each of the rocking bars of the book are fixed at arbitrary intervals. 3. The sieve vibrating device for a sieving machine according to claim 1 or 2, wherein the sieving frame is installed via a vibrator for vertically swinging the entire sieving frame. Vibration device. 4. The sieving vibrating device for a sieving machine according to claim 1 or 2, wherein the sieving frame is mounted on a machine frame. 5. The sieving vibration device for a sieving machine according to any one of claims 1 to 4, wherein a plurality of oscillating bars are divided into two groups, and the oscillating bar of the first group and the oscillating bar of the second group are divided into two groups. A sieve vibrating device for a sieving machine in which the swing cycle of the swing bars is set so that the swing bars alternately hit the bottom surface of the sieve. 6. The sieving vibration device for a sieving machine according to any one of claims 1 to 5, wherein a damper is provided at an arbitrary position between the hammer or the oscillating bar and its driving means. Sieve vibrating device.