JPH091075A - Oscillating sieve - Google Patents

Abstract

PURPOSE: To change the angle between upper and lower unbalance weights by changing the rotational direction of a rotary shaft. CONSTITUTION: The first and second position regulating members 45, 46 are installed movably respectively in long holes 47, 48 formed on the periphery of a coupling 35 to be located on both sides of a lower unbalance weight 34. The weight 34 is attached rotatably to a rotary shaft 32 and, when the shaft 32 turns in the arrow A direction, is contacted with the contact part 45b of the first position regulating member 45 to turn. When the shaft 32 turns in the reverse arrow A direction, the weight 34 is contacted with the contact part 46b of the second position regulating member 46 to turn. When the members 45, 46 are positioned at desired divisions in advance, the angle between the lower unbalance weight 34 and the upper unbalance weight is changed only by changing the rotational direction of the rotary shaft 32 so that two kinds of oscillation modes are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating sieve device in which the angle of a lower unbalance weight with respect to an upper unbalance weight automatically changes according to a change in the rotation direction of a rotating shaft.

[0002]

2. Description of the Related Art A vibrating sieve apparatus vibrates a sieve mesh provided in a sieve body integrally with the sieve body to sift out raw materials supplied on the sieve mesh having a predetermined particle size or less. To classify. The vibration is generated by two unbalanced weights which are vertically separated from each other on a rotating shaft which is rotated by rotating a motor, for example, by rotating a motor. , Generate the horizontal vibration of the sieve mesh surface, move the raw material on the sieve mesh in the circumferential direction, the rotation of the lower unbalance weight generates the vertical vibration, the raw material on the sieve mesh It is designed to move in the direction. Thus, the sieve mesh causes a three-dimensional motion in which these vibrations are synthesized, and the three-dimensional motion may change depending on the angle between the upper unbalance weight and the lower unbalance weight. know. Therefore, the user adjusts the position of the unbalance weights to change the angle between the upper and lower unbalance weights according to the sieving conditions such as the shape, particle size, and specific gravity of the material in the raw material supplied on the sieve screen. ,
This changes the vibration mode of the screen.

As shown in FIG. 6, a vibration applying means of a conventional vibrating sieve device includes upper and lower unbalance weights 1 and 2 at upper and lower ends of a rotating shaft 4 supported by a vibrating body housing 3. Installed. A coupling 5 attached to the lower end of the rotating shaft 4 is connected to a V pulley 7 via a drive spring 6.
And a V pulley connected to a motor (not shown).
The belt 8 is stretched around, whereby the upper unbalance weight 1 and the lower unbalance weight 2 are driven to rotate by a motor to generate vibration. The upper unbalance weight 1 is fitted and fixed to the rotary shaft 4, while the lower unbalance weight 2 is fixed to the rotary shaft 4 by tightening the adjusting bolt 9 as shown in FIG. 7.
When the adjustment bolt 9 is loosened, it becomes rotatable. Therefore, by loosening the adjustment bolt 9 and rotating the lower unbalance weight 2 to a desired position on the scale 10 provided on the coupling 5, the adjustment bolt 9 is tightened and fixed again, thereby lowering the lower part. The angle of the unbalance weight 2 with respect to the upper unbalance weight 1 can be changed.

[0004]

However, in the above conventional structure, the lower unbalance weight 2 is fixed to the shaft 4 of the vibrating body housing 3 by tightening the adjusting bolt 9, so that the sieving condition is satisfied. When changing the angle with respect to the upper unbalance weight 1 in accordance with the above, the work to loosen the adjustment bolt 9 to adjust the lower unbalance weight 2 to the desired angle and then tighten the adjustment bolt 9 again is required. I have to.

[0005] Further, since the discharge port for discharging the raw material on the sieve mesh is usually provided on the outer periphery of the sieve main body, the vibration mode applied to the sieve main body is such that the raw material is placed on the sieve net from the center side toward the outer periphery. The mode is set so as to move toward the side, but in such a vibration mode, the raw material may be discharged from the discharge port before it is sufficiently sieved.
In order to solve this problem, at the beginning of the sieving operation, the raw material should stay on the screen for a long time, and then be quickly discharged from the discharge port body. Then, as described above, the upper unbalance weight 1
The vibration mode must be changed by adjusting the angle of the lower unbalance weight 2 with respect to the length of the lower unbalance weight 2, which means that the interruption time of the sieving operation becomes longer, and the productivity becomes worse.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vibrating sieve device capable of changing an angle between upper and lower unbalance weights by changing a rotation direction of a rotating shaft. is there.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a vibrating means is used to vibrate a sieve body, whereby a sieve mesh provided in the sieve body is vibrated integrally with the sieve body so that the raw material on the sieve mesh is vibrated. In a vibrating sieve device that was designed to sieve
The vibration imparting means is composed of a rotary shaft and upper and lower unbalance weights that are provided separately from each other in the vertical direction on the rotary shaft and rotate integrally with the rotary shaft. It is characterized in that it is configured to automatically change in accordance with a change in the rotation direction of the rotary shaft (Claim 1).

Of the upper and lower unbalanced weights, at least one unbalanced weight is rotatably supported on the rotary shaft, and the rotary shaft or a member that rotates integrally with the rotary shaft has first and second unbalanced weights. Position regulating members are provided on both sides of the rotatable unbalance weight, and the first and second position regulating members are unbalanced so that either one of them is rotatable according to the rotation direction of the rotating shaft. It is advisable to contact the weight and rotate the unbalanced weight integrally with the rotary shaft (claim 2).

In this case, it is preferable that the first and second position regulating members are provided on the one-direction rotating side and the other-direction rotating side with respect to the center of gravity of the other unbalance weight. 3). Further, it is preferable that the first and second position regulating members are provided so that their positions can be adjusted (claim 4).

Further, when the rotating shaft rotates in one direction, the lower unbalance weight is provided with an upper unbalance weight so as to impart a vibration mode in which the raw material on the sieve mesh moves from the center toward the outer periphery so as to swirl in one direction. When the rotation axis rotates in the other direction, the lower unbalanced weight is applied so as to give a vibration mode in which the material on the sieve mesh swirls to the other side and moves from the outer circumference toward the center. Can rotate after a predetermined angle with respect to the upper unbalanced weight (claim 5). In addition, it is preferable that the discharge port body for discharging the raw material left on the sieve mesh is inclined and projected from the outer peripheral portion of the sieve body in one direction of the rotation axis (claim 6).

[0011]

The vibration of the sieve mesh provided in the sieve body of the vibrating screen device is caused by the rotation of the rotating shaft by the motor.
This is caused by the rotation of the upper and lower unbalance weights provided separately in the vertical direction on the rotating shaft. It is known that various vibration modes can be obtained depending on the angle between the upper and lower unbalance weights. . The angle between the unbalanced weights means an angle formed by a straight line connecting the center of gravity of each unbalanced weight and the center of rotation.

FIG. 5 shows the relationship between the angle between the upper and lower unbalance weights and the vibration mode of the sieve net. The upper part shows the positional relationship between the upper and lower unbalance weights as viewed from the upper unbalance weight side. The lower part shows the state of movement of the raw material on the sieve mesh corresponding to the positional relationship between the two unbalance weights in the upper part.

As shown in FIG. 5 (a), the lower unbalance weight is at an angle 90 to the left of the upper unbalance weight.
When positioned with a certain degree, the material on the screen moves in a swirl in the direction of arrow A toward the center, regardless of the direction of rotation of the rotating shaft. And, as this angle becomes smaller, the tendency to swirl toward the center becomes weaker, and eventually, on the contrary, the raw material on the sieve mesh shows a tendency to move toward the outer periphery, and when the rotation axis rotates in the direction of arrow A, When the angle between the upper and lower unbalance weights is approximately 60 degrees, and when the rotation axis rotates in the direction of the arrow A, when the angle is 45 degrees,
As shown in FIG. 5B, the raw material on the sieve mesh 32 moves so as to swirl in the direction of arrow A toward the outer periphery. Furthermore, when the positions of the upper and lower unbalance weights match, the raw material on the sieve mesh is
As shown in FIG. 5 (c), it moves linearly toward the outer peripheral direction.

On the other hand, when the lower unbalance weight is located on the right side with respect to the upper unbalance weight, the raw material on the sieve mesh is rotated in a direction opposite to the above-described left direction in the direction of the arrow A. As shown in FIG. 5 (d), the angle between the upper and lower unbalanced weights is 60 degrees, and the rotation axis rotates in the direction of arrow A, as shown in FIG. In this case, when the angle is 45 degrees and the rotation axis rotates in the direction indicated by the arrow A, the material on the sieve mesh moves so as to spiral in the direction indicated by the arrow A toward the outer periphery. Although not shown, as the angle increases, the material on the screen tends to move toward the center, and the angle between the upper and lower unbalance weights is 9%.
At 0 degrees, the material on the sieve mesh will swirl in the direction opposite to arrow A toward the center, regardless of the rotation direction of the rotating shaft, as in the case where the lower unbalance weight is located on the left side of the upper unbalance weight. Move to.

Therefore, according to the first aspect of the invention, when the rotation direction of the rotary shaft is changed, the angle between the upper and lower unbalance weights is automatically changed. By changing the, it is possible to obtain two types of vibration modes generated in the screen, for example, it is possible to change the vibration mode according to the raw material, or to change the time that the raw material stays on the screen. it can.

Further, according to the second aspect, when the rotation direction of the rotating shaft changes, of the first and second position regulating members, the position regulating member corresponding to the rotating direction is attached to the rotating shaft. The unbalance weight is brought into contact with a rotatably provided unbalance weight to rotate the unbalance weight integrally with the rotating shaft. Therefore, with a simple configuration in which the two position restricting members are provided on the rotating shaft or a member that rotates integrally with the rotating shaft so as to be positioned on both sides of the rotatable unbalance weight, the two position regulating members are arranged in accordance with the rotating direction of the rotating shaft. The angle between the upper and lower unbalance weights can be automatically changed.

According to the third aspect of the present invention, when the rotary shaft rotates in one direction, the rotatable unbalanced weight is positioned at the rotation side in the other direction with respect to the center of gravity of the other unbalanced weight. The raw material on the sieve mesh moves toward the center or the outer peripheral side while rotating in one direction while being in contact with the regulating member and being positioned on the other side rotation side with respect to the other unbalance weight. On the other hand, when the rotation shaft rotates in the other direction, the rotatable unbalance weight comes into contact with the position regulating member provided on the one-direction rotating side with respect to the center of gravity of the other unbalance weight, The raw material on the sieve mesh moves toward the center or the outer peripheral side while rotating in the other direction while rotating in the one direction rotating side.

According to the fourth aspect of the present invention, by adjusting the positions of the first and second position regulating members, the angle between the upper and lower unbalance weights when the rotary shaft rotates in one direction, and The angle between the upper and lower unbalance weights when the rotating shaft rotates in the other direction can be freely changed.

According to the fifth aspect, when the rotating shaft rotates in one direction, the raw material on the sieve screen exhibits a vibration mode in which the material moves from the center toward the outer periphery so as to swirl in one direction. When the rotating shaft rotates in the other direction, the raw material on the screen shows a vibration mode in which the raw material moves from the outer circumference toward the center so as to swirl to the other side.

According to the sixth aspect, when the rotating shaft rotates in one direction and the raw material on the sieve mesh moves toward the outer peripheral side so as to swirl in the one direction, the outer peripheral portion of the sieve main body moves. The rotary shaft smoothly enters the discharge port body that is provided so as to project in one direction and is discharged.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, FIG. 2 shows the entire configuration. A vibrating body base 23 is supported on a gantry 21 via a frame receiving spring 22 so as to be able to vibrate. A sieve body 24 is fixed to the vibrating body base 23. I have. Sieve body 24
The lower cylindrical frame 25, the middle cylindrical frame 26,
The upper cylindrical frame 27 is formed by stacking the upper cylindrical frame 27, and the upper surface of the upper cylindrical frame 27 is covered with a tapered lid 29 having a raw material inlet 28 formed in the center. The sieve body 24 is vertically divided by a sieve mesh 30 whose peripheral edge is sandwiched and fixed between the middle cylindrical frame 26 and the upper cylindrical frame 27.

A vibrating body housing 31 is fixed to the lower surface of the vibrating body base 23 at the center thereof, and a rotary shaft 32 is mounted on the vibrating body housing 31 via a bearing (not shown).
Are rotatably supported. The rotating shaft 32 is located at an upper end portion protruding upward and a lower end portion protruding downward of the vibrating body housing 31, and the upper and lower unbalance weights 3 are disposed on the rotating shaft 32.
3, 34 are attached to form vibration imparting means, and at this time, the upper unbalance weight 33 is fixed to the rotary shaft 32 so as to rotate integrally with the rotary shaft 32, while the lower unbalance weight is fixed. 34 is the rotating shaft 3
2 rotatably supported.

The rotating shaft 32 includes a coupling 35 and a driving spring 36 fixed to the coupling 35.
V is rotatably supported on the inner bottom surface of the gantry 21 through the
A V-belt 40 is stretched between the V-pulley 37 and a V-pulley 39 connected to a rotation shaft 38 a of a motor 38 fixed to the inner surface of the gantry 21.

It should be noted that one-way rotation of the motor 38 is defined as forward rotation,
At this time, the rotation shaft 32 rotates in the direction of arrow A as shown in FIG. On the other hand, the other direction rotation of the motor 38 is reversed, and at this time, the rotation shaft 32 rotates in the direction opposite to the arrow A.

Further, on the outer peripheral portion of the upper cylindrical frame 27, a sieve mesh 3
A net outlet 41 for discharging the raw material remaining on the upper cylindrical frame 27 is provided on the rotating shaft 3.
2, there is provided a discharge port body 42 which is inclined and protrudes in the direction of arrow A as shown in FIG. The outer peripheral portion of the lower cylindrical frame 25 is provided with an under-mesh discharge port (see FIG. 1) for discharging the raw material received through the conical product receiver 43 provided on the bottom surface of the lower cylindrical frame 25 through the sieve mesh 30. (Not shown), and a discharge port body 44 is provided therein.

The upper unbalance weight 33 and the lower unbalance weight 34 are designed to rotate at an angle therebetween, and this angle causes the screen mesh to rotate when driven by the motor 38. It has been found that the vibrations generated at 30 differ. Then, as shown in FIG.
Of the rotating shaft 32 or the rotating shaft 3
The first and second position regulating members 45 and 46 movably provided on a member that rotates integrally with the rotating shaft 2, in this embodiment, a coupling 35 that rotates integrally with the rotating shaft 32.

As shown in FIG. 3 (only the second position restricting member 46 is shown in FIG. 3), the position restricting members 45 and 46 are attached to the back surface of the coupling 35. Rod-shaped contact portions 45b and 46b are provided so as to protrude from the upper surface of one end of each of 45a and 46a.
At the periphery of the coupling 35, arc-shaped long holes 47 and 48 and holes of the mounting plates 45 a and 46 a provided symmetrically with respect to a straight line B connecting the center of gravity of the upper unbalance weight 33 and the center of the rotating shaft 32. The bolts 49a, 49a as fastening members are inserted so that
a, 49a are fixed by tightening the lower ends thereof with nuts 49b, 49b.

The two position regulating members 45, 46
Can be removed by loosening the nuts 49b, 49b.
7 and 48, for example, the upper and lower unbalance weights 33 and 34 when the motor 38 rotates forward.
To change the angle between them, the first position regulating member 45 is moved to the scale 50 having a desired angle, and then the nut 49b is tightened and fixed. When changing the angle between 33 and 34, the second position regulating member 46 is set to a scale 5 having a desired angle.
After moving to 0, the nut 49b is tightened and fixed. Then, when the motor 38 rotates in the forward direction, the rotating shaft 32 rotates in the direction of arrow A.
4 is in contact with the contact portion 45b of the first position regulating member 45, and is integrated with the rotating shaft 32 at the same position or with a delay with respect to the upper unbalance weight 34 (left side when viewed from the upper unbalance weight 34 side). It comes to rotate. On the other hand, when the motor 38 rotates in the reverse direction, the rotating shaft 32 rotates in the direction indicated by the arrow A, so that the lower unbalance weight 34 contacts the contact portion 46 b of the second position regulating member 46, and the upper unbalance weight 33 At the same position or with a delay (on the right side when viewed from the upper unbalance weight 34 side).

Next, the operation of the above configuration will be described. First, for example, when the motor 38 rotates forward, the position of the first position regulating member 45 is fixed so that the angle between the upper and lower unbalance weights 33 and 34 is approximately 40 degrees. The second position regulating member 46 is fixed so that the angle between the weights 33 and 34 is approximately 60 degrees. Then, the motor 38 is set to rotate in the reverse direction and energized, and the raw material is supplied from the raw material charging port 28 into the sieve main body 24 of the vibrating sieve device in a vibrating state. At this time, since the coupling 35 is rotated by the motor 38 in the direction opposite to the arrow A, the lower unbalance weight 34 is brought into contact with the contact portion 46a of the second position regulating member 46 as shown by the solid line in FIG. , The angle to the upper unbalance weight 33 is 60
As a degree, the anti-arrow A together with the upper unbalance weight 33
It is driven to rotate in the direction. Therefore, the angle between the upper and lower unbalance weights 33 and 34 exceeds 45 degrees shown in FIG. 5D, so that the raw material on the sieve mesh 30 swirls counterclockwise toward the center (the direction of the arrow A). While being sifted by the vibration of the sieve screen 30.

When the sieving operation of the raw materials has proceeded sufficiently, the motor 38 is stopped and switched so that the motor 38 rotates forward, and then the power is supplied again to vibrate the vibrating screen device. At this time, since the coupling 35 is rotated in the direction of arrow A, the lower unbalanced weight 34 moves the lower unbalance weight 34 into contact with the first position regulating member 45 as shown by the chain double-dashed line in FIG.
It is brought into contact with a and is driven to rotate together with the upper unbalanced weight 33 in the direction of arrow A at an angle of 40 degrees with respect to the upper unbalanced weight 33. Then, the angle between the upper and lower unbalanced weights 33 and 34 becomes smaller than the angle in FIG. 5B, and the sieve mesh 30 does not pass through the mesh of the sieve mesh 30.
The raw material remaining on the top is rotated clockwise (arrow A) toward the outer circumference.
Since it advances in a swirling direction, it is discharged from the discharge port body 42 via the net discharge port 41. At this time, the discharge port body 42 is inclined in the direction of arrow A with respect to the upper cylindrical frame 27,
That is, since the raw material is provided so as to match the spiral movement direction of the raw material, the raw material smoothly enters the discharge port body 42 and is discharged. On the other hand, the raw material dropped into the product receiver 43 after passing through the mesh of the sieve screen 30 is discharged from the discharge port body 44 through the discharge port below the net regardless of the rotation direction of the motor 38.

As described above, according to the present embodiment, the motor 38
The angle between the upper and lower unbalanced weights 33 and 34 changes only by changing the rotation direction of the, and the vibration mode of the sieve mesh 30 can be changed. Therefore, two kinds of vibration modes can be obtained only by changing the rotation direction of the rotary shaft 32 (motor 38). Therefore, for the two kinds of raw materials having different sieving conditions, the position regulating members 45 and 46 are selected one by one. There is no need to change the position, and setup work can be omitted.

In addition, the change in the angle between the upper and lower unbalance weights 33 and 34 due to the change in the rotation direction is caused by the first and second position regulating members 4 provided on the coupling 35.
The lower unbalance weight 34 is attached to one of the position regulating members corresponding to the rotation direction of the motor 38,
Can be realized by a relatively simple configuration that is performed by contact.

Since the first and second position restricting members 45 and 46 are provided so that their positions can be adjusted, both the upper and lower parts can be adjusted in accordance with the conditions such as the shape and specific gravity of the raw material charged into the sieve body 24. The angle between the unbalanced weights 33 and 34 can be changed, and a desired vibration mode can be obtained.

Further, before starting the sieving operation of the raw material by vibrating the vibrating screen device, the positions of the first and second position regulating members 45 and 46 are set in advance, whereby
When changing the vibration mode of the sieve mesh 30, the vibration mode can be changed only by stopping the motor 38 and changing the rotation direction without interrupting the work for a long time, so that the workability is good.

Further, in the above-mentioned operation, the first position regulating member 45 is arranged so that the lower unbalance weight 34 rotates about 40 degrees later than the upper unbalance weight 33 when the rotating shaft 32 rotates in the direction of arrow A. The lower unbalance weight 34 is brought into contact with the second position regulating member 46.
The lower unbalance weight 34 comes into contact with the lower unbalance weight 34 so that the lower unbalance weight 34 rotates about 60 degrees behind the upper unbalance weight 33 when the rotation shaft 32 rotates in the direction of the arrow A. Thus, the first and second
By setting the positions of the position regulating members 45 and 46, first, when the rotating shaft 32 is rotated in the direction indicated by the arrow A,
Since the raw material on the sieve screen 30 moves in the direction of the arrow A toward the center so as to swirl, the raw material can be sufficiently sieved without being discharged from the discharge port 41 on the screen, and then the raw material is sieved. Is completed, and when the rotating shaft 32 is rotated in the direction of arrow A, the raw material remaining on the sieve mesh 30 moves toward the outer periphery in a manner swirling in the direction of arrow A and heads toward the discharge outlet 41 on the mesh. Therefore, the sieving and discharging of the raw materials can be performed efficiently, and the workability is further improved.

Moreover, the rotating shaft 32 is connected to the discharge port 41 on the net.
Since the discharge port body 42 which is inclined and protrudes in the direction of the arrow A so as to coincide with the spiral movement direction of the raw material when the is rotated in the direction of the arrow A is provided, the raw material heading toward the net discharge port 41 is It smoothly enters the discharge port body 42 and is discharged.

The present invention is not limited to the embodiments described above and shown in the drawings, and the following modifications or expansions are possible. The first and second position regulating members may be provided on the rotating shaft 32. In this case, the position regulating member is, for example, a rotary shaft 32 provided in a hole provided at one end thereof.
A plate-like attachment member that is attached to the rotary shaft 32 by inserting the rod into the rotary shaft 32, and a rod-shaped abutting member protruding from the other end of the mount member. It is preferable that the bolts be fixed by tightening the bolts, and the bolts can be rotated by loosening the bolts.

The inclination of the discharge port body 42 with respect to the upper cylindrical frame 27 is not limited to the one shown in FIG. The upper unbalance weight 33 is fixed to the rotating shaft 32, and the lower unbalance weight 34 is rotatably supported on the rotating shaft 32. Conversely, the upper unbalance weight 33 can be rotated about the rotating shaft 32. And the lower unbalance weight 34 may be fixed to the rotating shaft 32, or the upper and lower unbalance weights 33, 34
May be rotatably supported on the rotating shaft 32.

In the above embodiment, the elongated holes 47, 48, the bolts 49a, 49a and the nuts 49b, 49b provided on the peripheral edge of the coupling 35 function as a position adjusting mechanism for the position regulating members 45, 46. However, the position adjusting mechanism includes, for example, a groove having a T-shaped cross section formed to open on the outer peripheral surface of the coupling 35, and a bolt for fixing a position regulating member movably fitted in the groove. May be configured. In this case, the position regulating member may be composed of a rod-shaped abutting portion and a mounting portion having a T-shaped cross section that is fitted into the groove portion protruding laterally at the lower end portion. The regulating member can be appropriately changed according to the configuration of the position adjusting mechanism.

[0040]

As is clear from the above description, the vibrating sieve device of the present invention has the following effects. In the case of the first aspect of the present invention, it is possible to easily obtain two kinds of vibration modes according to the sieving conditions of the raw materials to be put on the sieve net by simply changing the rotation direction of the rotating shaft.

According to the second aspect of the present invention, a specific structure for automatically changing the angle between the upper and lower unbalance weights in accordance with the rotation direction of the rotating shaft is provided on both sides of the rotatable unbalance weight. In addition, the first and second position regulating members can be realized by a simple configuration in which the first and second position regulating members are provided on a rotating shaft or a member that rotates integrally with the rotating shaft.

In the case of the third aspect of the invention, by changing the rotation direction of the rotating shaft, it is possible to change the spiral moving direction of the raw material charged on the sieve mesh, and the rotating direction of the rotating shaft and the spiral moving direction of the raw material can be changed. Match. Therefore, for example, when the discharge port body for discharging the raw material on the screen is tilted from the outer peripheral portion of the screen main body to the one direction rotation side of the rotation shaft, the rotation shaft is rotated to the one direction side. As a result, the raw material smoothly enters the discharge port and is discharged, so that workability is good.

In the case of the invention described in claim 4, the first and the second
The position regulating member is adjustable in position, so that the rotating shaft rotates in one direction to obtain a vibration mode that matches the conditions such as the shape and specific gravity of the raw material put on the sieve mesh or the sieving condition. The angle between the upper and lower unbalance weights and the angle between the upper and lower unbalance weights when the rotating shaft rotates in the other direction can be freely changed.
By setting the positions of the first and second position regulating members in advance, the vibration mode is automatically changed only by changing the rotation direction of the rotating shaft without interrupting the work for a long time. Good nature.

In the case of the invention described in claim 5, when the rotary shaft is rotated in the other direction at the beginning of the sieving operation, the raw material on the sieve mesh moves spirally from the outer periphery toward the center. It can be sufficiently sifted without being discharged, and then the raw material on the sieve mesh swirls from the center to the outer periphery simply by changing the rotation direction of the rotating shaft to one direction side. It can be discharged efficiently and workability is further improved.

In the case of the sixth aspect of the invention, the slanting direction of the discharge port body provided on the outer peripheral portion of the screen body and the rotation direction of the rotary shaft are set to one direction so that they are left on the screen. Since the direction in which the raw material swirls toward the outer circumference coincides, the raw material left in the form of a sieve mesh smoothly enters the outlet body,
Is discharged.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing an embodiment of the present invention.

FIG. 2 is a front view showing the right half of the vibrating sieve device in cross section.

FIG. 3 is a side view showing a main part partially broken away.

FIG. 4 is a schematic configuration diagram showing a positional relationship between an outlet body and an upper cylindrical frame.

FIG. 5 is a diagram schematically showing a relationship between an angle between upper and lower unbalance weights and a moving direction of a substance on a sieve screen.

FIG. 6 is a partial perspective view showing a vibration applying means of a conventional vibration sieve device.

FIG. 7 is a perspective view showing a mounting structure of a lower unbalance weight.

[Explanation of symbols]

24 is a sieve body, 30 is a sieve mesh, 32 is a rotating shaft, 33 is an upper unbalanced weight, 34 is a lower unbalanced weight, 35 is a coupling (a member that rotates integrally with the rotating shaft), 42 is a discharge port body, 45 is a first position regulating member, 4
Reference numeral 6 denotes a second position regulating member.

Claims (6)

[Claims] 1. A vibrating screen adapted to vibrate a screen body provided in the screen body together with the screen body by vibrating the screen body by vibrating means so as to remove the raw material on the screen screen. In the apparatus, the vibration imparting means includes a rotary shaft and upper and lower unbalance weights that are provided separately from each other in the vertical direction on the rotary shaft and rotate integrally with the rotary shaft. The vibrating screen device is characterized in that the angle is automatically changed according to the change of the rotation direction of the rotary shaft. 2. An unbalanced weight of at least one of the upper and lower unbalanced weights is rotatably supported on a rotary shaft, and the rotary shaft or a member that rotates integrally with the rotary shaft has first and second unbalanced weights. Position regulating members are provided on both sides of the rotatable unbalance weight,
One of the first and second position restricting members is in contact with an unbalance weight that is rotatable according to the rotation direction of the rotating shaft, and rotates the unbalance weight integrally with the rotating shaft. The vibrating screen device according to claim 1. 3. The first and second position restricting members are provided so as to be located on the one-direction rotating side and the other-direction rotating side with respect to the center of gravity of the other unbalanced weight. The vibrating screen device according to 1. 4. The vibrating screen device according to claim 2, wherein the first and second position restricting members are provided so that their positions can be adjusted. 5. The lower unbalanced weight is an upper unbalanced weight so as to impart a vibration mode in which the raw material on the sieve mesh is swirled in one direction toward the outer periphery when the rotating shaft is rotated in one direction. When the rotation axis rotates in the other direction, the raw material on the sieve mesh moves toward the center from the outer circumference so as to swirl in the other direction. 5. The weight rotates after a delay of a predetermined angle with respect to the upper unbalanced weight.
The vibrating screen device according to any one of 1. 6. The discharge port body for discharging the raw material left on the sieve mesh is inclined and projected from the outer peripheral portion of the sieve body in one direction of the rotation axis of the rotary shaft. Vibrating screen device.