JPH0568945A - Vibrating screening apparatus - Google Patents

Abstract

PURPOSE:To prevent the damage to a screen by preventing or controlling the rolling of a vibrating rod composing a vibration generator for the screen in a vibrating screening apparatus equipped with the vibration generator for the screen. CONSTITUTION:A cylindrical housing 26 is set on the upper surface of an upper casing part 18b, and an elastic cylindrical part 28 is installed between the inner periphery of the cylindrical housing 26 and the outer periphery of the base end part of a vibrating rod 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrating and sieving apparatus provided with a vibration generating device for a sieving net for directly vibrating the sieving net.

[0002]

2. Description of the Related Art This vibrating and sieving apparatus is for directly vibrating a trough on which a sieve mesh is stretched, a main vibration generator for vibrating this trough, and a sieve mesh stretched on the trough. And a vibration generator for the sieve net, which vibrates the entire trough by the main vibration generator, and at the same time, directly vibrates the sieve net by the vibration generator for the sieve net to screen the material. is there. When the sieve screen vibration generator is used to directly vibrate the sieve screen, the screening ability of the sieve machine is enhanced. In this vibration generating device for sieve nets, a casing containing a vibration source is fixed to the lower surface of the bottom plate portion of the trough, and the proximal end portion of the vibrating rod is fixed to the casing via an elastic member. It is connected almost vertically to the sieving net, and the tip of this vibrating rod penetrates the bottom plate of the trough and is fixed to the sieving net.It is excited by the vibration source built into the casing. The vibrating rod is vibrated in its axial direction to directly vibrate the sieve net.

As described above, since the lower end of the vibration rod is connected to the casing fixed to the lower surface of the bottom plate of the trough through the elastic member, the upper end thereof is fixed to the sieving net. In addition, when the vibrating rod vibrates in the axial direction by the vibration source built in the casing, the vibrating rod laterally shakes around the lower end thereof. The lateral runout of the vibrating rod is enlarged toward the upper end thereof. If lateral vibration of the vibrating rod repeatedly occurs during sieving, the sieving net that fixes the upper end of the oscillating rod is damaged. If the sieve mesh is damaged in this way, the life of the sieve mesh will be shortened, and a part of the material to be sorted which is being conveyed on the sieve mesh by the vibration action will not be sorted by the sieve mesh and will fall from the damaged part. , And the accuracy of sieving screen selection decreases.

[0004]

SUMMARY OF THE INVENTION The present invention, in a vibrating and sieving apparatus having a sieving net vibration generator, prevents or suppresses lateral runout of a vibrating rod that constitutes the sieving net vibration generator. Therefore, it is an object to eliminate the damage of the sieving net, prolong the life of the sieving net, and at the same time prevent the deterioration of the sorting accuracy of the vibrating sieving apparatus.

[0005]

Means for Solving the Problem The means adopted by the present invention for solving this problem are to allow the axial vibration of a vibrating rod constituting a vibration generating device for a sieve net,
The elastic cylindrical member for suppressing the lateral shake is interposed between the lower end of the vibrating rod and the casing.

[0006]

When the vibration source built into the casing repeats suction and release of the vibration rod, the elastic tubular member interposed between the vibration rod and the casing , The inner peripheral part thereof reciprocates slightly in the axial direction with respect to the outer peripheral part to repeat the shear deformation. As a result, the vibrating rod vibrates in its axial direction without hindrance, but this elastic tubular member becomes an obstacle, and lateral shake of the base end portion is suppressed.
At the upper end of the vibration rod, lateral shake of the base end expands, but since the lateral shake of the lower end of the vibrating rod is suppressed, the upper end of the vibrating rod fixed to the sieving mesh is suppressed. Is significantly suppressed, and damage to the fixed portion of the upper end of the vibration rod in the sieving net is prevented.

[0007]

EXAMPLES The present invention will be described in more detail with reference to examples. First, an outline of the overall configuration of the vibrating and sieving apparatus will be described, and then, the portion of the vibration generating apparatus for a sieving net according to the present invention will be described in detail. 1 is a front view of a vibrating screen device according to the present invention, FIG. 2 is a right side view of the same, FIG. 3 is a plan view of the same, and FIG.
5 is an enlarged sectional view taken along line XX of FIG. 5, and FIG. 5 is an enlarged sectional view taken along line YY of FIG. A total of two pairs of columns 2a and 2b, one pair each in the front and rear, are erected on the substrate 1, and the troughs 4 are attached to the upper ends of the columns 2a and 2b via the vibration-proof springs 3 in a forward tilted posture. An electric motor mounting plate 5 is integrally provided on a bottom plate portion 4a of the trough 4, and as shown in FIG. 2, a pair of vibrating electric motors 6 are provided on the electric motor mounting plate 5 along a width direction of the trough 4. It is installed at intervals. The pair of vibration motors 6 are mounted on the rear side of the trough 4 (the upstream side as viewed from the flow of the material to be sorted) to vibrate the entire trough 4.

As shown in FIG. 4, the width of the sieving net 7 is slightly smaller than the width of the trough 4, and the reinforcing contact plates 8 attached to both ends in the width direction of the sieving net are inward. In addition, it is bent obliquely upward and hooked on the hook 9. By pulling this hook 9 inside the side plate portion 4b with a tension bolt 11 and a tension spring 12 outside the trough 4, tension in the width direction is applied to the sieve mesh 7. As shown in FIGS. 1 and 3, the front end portion of the bottom plate portion 4a of the trough 4 has first and second
The respective discharge ports 13 and 14 are provided. First and second
The material that has passed through the sieving net 7 and the material that has not passed through are discharged from each of the discharge ports 13 and 14. The opening of the trough 4 is covered with a lid body 15, and the lid body 15 is provided with a charging port 16 for charging the material to be sorted into the trough 4.

Further, the vibrating and sieving apparatus according to the present invention comprises a plurality of sieving net vibration generators 17 for directly vibrating the sieving net 7. In this embodiment, two sets are provided at the same position along the moving direction P of the material to be sorted at a predetermined interval in the width direction of the sieving net 7, and two sets are provided between each set. One unit is provided, and a total of five sieve-generator vibration generators 17 are provided.

Next, the vibration generator 17 for the sieve net will be described with reference to FIGS. 6 to 8. An electromagnet 19 as a vibration source is built in a lower casing portion 18a which constitutes the casing 18, and is fixed to the bottom plate portion thereof. A leaf spring 20 is attached inside the upper casing portion 18b, and the pair of plate members 21a and 21b are attached to the leaf spring 20.
, The lower end of the vibration rod 22 is fixed to the upper plate 21a, and the movable core 23 is fixed to the lower plate 21b. The movable core 23 is fixed to the iron core 24 of the electromagnet 19 with a predetermined gap. They are facing each other up and down. Therefore, the coil 2 wound around the iron core 24 of the electromagnet 19
When an alternating current flows through the core 5, the iron core 24 moves to the movable core 23.
Are alternately sucked and released to cause the vibration rod 22 to vibrate along its axial direction.

On the upper surface of the upper casing portion 18b, a cylindrical housing 26, which is concentric with the vibrating rod 22, is attached to the bolt 2.
7, the elastic cylindrical member 28 is interposed between the inner peripheral surface of the cylindrical housing 26 and the outer peripheral surface of the vibration rod 22. The elastic tubular member 28 of this embodiment
As shown in FIG. 8, a thin metal inner cylinder 28b is fixed to the inner peripheral surface of the rubber cylinder 28a, and a thin metal outer cylindrical body 28c is similarly fixed to the outer peripheral surface thereof. It is a composition. In the mounted state of the elastic tubular member 28, the upper end surface of the inner cylindrical body 28b is pressed by the nut 30 screwed to the screw portion 22a of the vibrating rod 22, and the lower end surface thereof is the step portion of the vibrating rod 22. Is in contact with. On the other hand, the outer cylindrical body 28c of the elastic tubular member 28 has its upper end surface abutted against the inner flange 26a of the tubular housing 26, and is prevented from moving up and down.

Vibration generator 1 for sieve net having the above structure
7 is attached to the trough 4 as follows. That is, as shown in FIGS. 4 and 5, a pair of angle members 29 having a U-shaped cross section are fixed to the back surface of the bottom plate portion 4a of the trough 4 at predetermined intervals along the width direction of the trough 4. The casing 18 of the vibration generator 17 for the sieve mesh is fixed to the pair of angle members 29 via the bolts 31, and the cylindrical housing 26 attached to the upper casing portion 18b is connected to the pair of angle members 29. It fits in between. The vibrating rod 22 has a hole 32 formed in the bottom plate portion 4a of the trough 4.
And penetrates into the trough 4, and its upper end is fixed to the sieving net 7, and the details of this fixed portion are shown in FIG. The sieving net 7 is provided with a bolt insertion hole 33,
A reinforcing ring 34 for protecting the sieving net 7 is integrally brazed to the back surface of this portion. The upper end surface of the vibrating rod 22 is in contact with the reinforcing ring 34, and a seat plate 35 and a mesh retainer 36 are arranged on the upper surface of the sieve mesh 7. The mesh retainer 36, the seat plate 35, and the sieve mesh 7 are disposed. And the vibration rod 2
2 and 2 are integrated with each other by a mesh holding bolt 37 in this order, whereby the upper end portion of the vibration rod 22 is fixed to the sieving net 7. Further, the net lower seat 38, the dustproof cap 39, and the dustproof rubber mounting seat 41 are fitted to the upper end portion of the vibrating rod 22 in this order, and the net lower seat 38 is fixed to the reinforcing ring 34 fixed under the net. It is pressed by the nut 42.
As shown in FIG. 5, the dustproof rubber 44 is covered on the dustproof rubber mounting seat 41 and the tubular portion 43 that has risen by forming the hole 32 of the trough 4. As a result, the sieve net 7
The material that has passed and dropped does not leak to the outside through the hole 32 provided in the bottom plate portion 4a of the trough 4.

Then, the vibration motor 6 which is the main vibration generator is activated to apply a linear vibration in the direction of the arrow Q (see FIG. 1) to the entire trough 4, and at the same time, the vibration generator 17 for each sieve mesh is activated. When the vibrating rod 22 is caused to generate linear vibration in the axial direction and the vertical vibration is directly applied to the sieving net 7, the material to be sorted put in the trough 4 vibrates on the sieving net 7. It is transported and sorted by both tilting and tilting. The material that has passed through the mesh of the sieving net 7 and dropped to the bottom plate portion 4a of the trough 4 is conveyed as it is and is discharged from the first discharge port 13 and does not fall from the mesh until reaching the end of the sieving net 7. The material falls at the end of this sieving mesh 7 and the second outlet 14
And the material is sorted.

In the vibration generating device 17 for the sieve screen, when the vibration rod 22 is repeatedly attracted and released by the electromagnet 19, the vibration rod 22 and the cylindrical housing 26 are repeated.
The elastic tubular member 28 interposed between the inner peripheral portion and the outer peripheral portion reciprocates slightly in the axial direction with respect to the outer peripheral portion and repeats shear deformation. As a result, the vibration rod 22 vibrates along its axial direction without any hindrance, but the presence of the elastic tubular member 28 suppresses lateral vibration of the base end portion of the vibration rod 22. That is, although the rubber cylindrical body 28a forming the elastic tubular member 28 may be compressed in the radial direction,
The amount of compression is small, and the lateral shake of the base end portion of the vibrating rod 22 is significantly suppressed as compared with the case where the elastic tubular member 28 is not provided. The lateral runout of the upper end of the vibration rod 22 is caused by the lateral runout of the base end being enlarged. However, since the lateral runout of the base end is suppressed and hardly occurs, the lateral runout of the vibrating rod 22 is fixed to the sieve mesh 7. Lateral shake of the upper end of the vibrating rod 22 is also suppressed. For this reason, in the past, the sieving net 7 may be damaged from the portion of the bolt insertion hole 32 provided in the sieving net 7 due to the lateral deflection of the upper end portion of the vibrating rod 22. This prevents this.

The elastic tubular member 28 described above has an inner cylindrical body 28b and an outer cylindrical body 28 made of thin metal on the inner and outer peripheral surfaces thereof, respectively.
Since it is covered with c, there is an advantage that it will not be worn even if it is used for a long period of time. However, the elastic tubular member in the present invention is not limited to this structure and may be entirely made of an elastic material.

[0016]

According to the present invention, since the elastic cylindrical member is interposed between the lower end portion of the vibration rod and the casing which constitute the vibration generating device for the sieve net, the vibration rod By allowing the vibration in the axial direction, the lateral shake of the base end can be prevented or suppressed. For this reason, the lateral shake of the upper end of the vibrating rod is suppressed, damage to the part of the sieving mesh that secures the tip of the oscillating rod can be prevented, and the life of the sieving mesh is extended, and the sieving mesh is long-lived. It is possible to maintain the sorting accuracy as a vibrating screen device.

[Brief description of drawings]

FIG. 1 is a front view of a vibrating screen device according to the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an enlarged cross-sectional view taken along line XX of FIG.

5 is an enlarged cross-sectional view taken along line YY of FIG. 4 in which a part of a vibration generating device for a sieve net 17 is cut away.

FIG. 6 is a vertical sectional view of a vibration generating device for a sieve screen.

FIG. 7 is an enlarged cross-sectional view of an upper end portion of a vibration generating device for a sieve net.

8 is a cutaway perspective view of an elastic tubular member 28. FIG.

[Explanation of symbols]

 4: Trough 4a: Bottom plate of trough 6: Vibration motor (main vibration generator) 7: Sieve net 17: Vibration generator for sieve net 18: Casing 19: Electromagnet (vibration source) 20: Leaf spring (elastic member) ) 22: Exciting rod 26: Cylindrical housing 28: Elastic tubular member

Claims (1)

[Claims] 1. A trough on which a sieve mesh is stretched, a main vibration generator for exciting the trough, and a vibration generation for a sieve mesh for directly exciting the sieve mesh stretched on the trough. This vibration generating device for a sieve screen is a case in which a vibration source is built in the lower surface of the bottom plate of the trough.
The singing is fixed, and the lower end of the oscillating rod is connected to the casing via an elastic member so that the lower end of the oscillating rod is substantially perpendicular to the sieving net. The upper end of the oscillating rod penetrates the bottom plate of the trough. And is fixed to a sieving net, and at the same time the entire trough is vibrated by the main vibration generator,
In a vibrating sieving apparatus configured to directly oscillate a sieving net by a sieving net vibration generator to allow sieving of materials, allowing vibration in the axial direction of the oscillating rod,
An oscillating sieving apparatus, characterized in that an elastic tubular member for suppressing the lateral shake is interposed between the lower end of the oscillating rod and the casing.