JPH0321233B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a circular vibrating sieve machine, and more particularly to a vibrating electric motor in which a sieve net stretched approximately horizontally on a cylinder body is disposed approximately perpendicularly thereto. The present invention relates to a circular vibrating sieve machine that sieves the material on the sieve screen by vibrating the sieve.

[Conventional technology and its problems]

5 to 10 show conventional examples of a circular vibrating sieve machine, and in these figures, the circular vibrating sieve machine is indicated as a whole by 1. A sieve net 4 is stretched inside the upper cylindrical body 2 via a mounting member 3, and below the sieve net 4, balls 8 for screening are partitioned by a partition wall 7 (see FIG. 7) and housed on a punched metal 5. has been done. The punched metal 5 is fixed to the upper edge of the middle cylindrical body 6, and an inverted conical guide member 9 is fixed below this.

A sieve net 10 is similarly stretched over the middle cylindrical body 6 via a mounting member 13, and a sieving ball 8 is housed on a punch metal 11 below the sieve net 10.
The punched metal 11 is fixed to the upper edge of the lower cylindrical body 12, and a conical material discharge guide 14 is fixed to the center thereof.

A material discharge port 15 is integrally formed in the side wall of the lower cylindrical body 12, and the material on the material discharge guide 14 is discharged to the outside through this port. Similarly, material discharge ports 17 and 16 are integrally formed in the side walls of the upper cylinder body 2 and the middle cylinder body 6, and these material discharge ports 15, 16, 17 are spaced at predetermined angular intervals as shown in FIG. It is arranged at a distance. A lid 18 is fixed to the upper cylindrical body 2, and a material receiving port 18a is formed in the center thereof.

The above-mentioned upper cylinder 2, middle cylinder 6 and lower cylinder 1
2 are assembled integrally, and the entire structure is supported vibratingly on a support casing 21 by a large number of coil springs 22 via a support ring 19 fixed to the lower cylindrical body 12. 27 is a substrate. As shown in FIG. 8, a plurality of mounting plates 20 extending in the radial direction are fixed to the support ring 19, and a plurality of mounting plates 20 are fixed to the support ring 19.
A vibration motor 23 is mounted by a plurality of lower mounting plates 25 fixed to the lower end of the . Vibration motor 23
has a known structure and is mounted so that its axis of rotation is vertical. Unbalanced weights 24a and 24b each having a substantially semicircular shape, the shape of which is clearly shown in FIG. It's summery.

Due to the rotation of the unbalanced weights 24a, 24b, the cylinders 2, 6, 12, and therefore the sieve nets 4, 1
At 0, a vibration force consisting of a circular vibration component in the horizontal plane and a linear vibration component in the vertical direction is generated, and the material supplied through the material receiving port 18a from, for example, a belt conveyor disposed above is transferred to the upper stage. It is divided into a lower sieve and an upper sieve on a sieve net 4 stretched inside the cylinder 2, and the upper sieve is discharged to the outside through the discharge port 17, and the lower sieve falls onto the guide member 9, and this The material is guided through the central opening 9a of the member 9 onto the sieve screen 10 below.

A similar action occurs on the sieve net 10, and the upper part of the sieve is discharged to the outside through the outlet 16, and the lower part of the sieve falls onto the discharge guide 14 and is discharged through the outlet 15. The mesh size of the upper sieve screen 4 is larger than the mesh size of the lower sieve screen 10. Therefore, material with large grain thickness is discharged from the upper discharge port 17, material with medium grain thickness is discharged from the middle discharge port 16, and material with small grain thickness is discharged from the lower discharge port 15. be done.

Unbalanced weight 24 of vibration motor 23
By changing the angle between a and 24b to 0°, 15°, 40°, and 90°, the material on the sieve screens 4 and 10 moves as shown in FIG. One of the angles is selected depending on the characteristics of the material to be sieved, but at any angle except 90°, the material tends to spread toward the outer periphery on the sieve nets 4 and 10. do.

Therefore, the material supplied onto the upper sieve net 4 by, for example, a belt conveyor is spread to the outer periphery due to the above-mentioned vibrations, and in this process is efficiently subjected to a sieving action. The same applies to the material on the lower sieve screen 10. Note that the balls 8 push through the sieving nets 4 and 10, making the sieving action more effective.

Although the conventional circular vibrating sieve machine performs the above-mentioned functions, it has the following drawbacks.

As shown in FIG. 9, the sieve screen 4 is attached to the annular frame 3 with a contact plate 33 and screws 34. The frame body 3 has an L-shaped cross section,
The horizontal part is a ring-shaped rubber bush 31, 3.
A tightening band 30 is tightened between each flange portion of the upper cylindrical body 2 and the middle cylindrical body 6 via 2.

Although the inner diameter of the upper cylindrical body 2 and the outer diameter of the frame body 3 are manufactured within dimensional tolerances, a gap S is formed between them. This gap S should be as small as possible since the material on the sieve will clog there, but there is a limit in terms of manufacturing, and if it is made too strict, there is a risk that assembly will not be possible.

Therefore, in the conventional structure, a gap S is inevitably formed, and the material not only gets stuck in this but sometimes leaks to the outside. That is,
Rubber bushes 31 and 32 are interposed for packing, the upper cylindrical body 2 and the middle cylindrical body 6.
The flange portions 2a and 6a are somewhat uneven and are not completely parallel. Furthermore, since there is a limit to the tightening force of the tightening band 30, the rubber bushes 31, 32 and the flange portion 2a,
6a may occur here and there, and the sieve material (generally having a sufficiently small particle size) located in the above-mentioned gap S leaks to the outside through these gaps.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a circular vibrating sieve machine that is easy to process and prevents material from unnecessarily leaking to the outside.

[Means for solving problems]

The above purpose is to create a circular sieve which is designed to sieve the material on the sieve net by vibrating a sieve net stretched almost horizontally on a cylinder body with a vibrating electric motor installed almost perpendicularly to the sieve net. In the vibrating sieve machine, an annular member is fixed densely and substantially concentrically to the cylindrical body, an annular frame body for attaching the sieve net is fixed to the annular member, and the material on the sieve of the sieve net is discharged. An annular passageway communicating with an outlet for the sieving is formed between the frame body and the cylinder body, and the transfer surface of the material in the annular passageway is the upper surface of the annular member, and the transfer surface is the top surface of the sieve mesh. This is accomplished by a circular vibrating sieve, which is located below the top surface.

[Effect]

All of the material that has fallen into the passage between the frame and the cylinder is transferred to the outlet by circular vibration without leaking unnecessarily to the outside, and is normally discharged from there as sieved material.

〔Example〕

Each embodiment of the present invention will be described below with reference to FIGS. 1 to 4. Note that corresponding parts in FIGS. 5 to 10 showing the conventional example are given the same reference numerals.

1 and 2 show a first embodiment of the present invention, FIG. 1 is a diagram corresponding to FIG. 7 of the conventional example, and FIG. 2 is a partially enlarged sectional view.

In Figures 1 and 2, the upper sieve screen 4
The outer peripheral edge of 0 is folded over the annular frame 43,
An annular member 45 is applied to this and fixed to the frame body 43 with bolts 44. The annular member 45 is concentrically fixed to the lower end of the upper cylindrical body 46 by welding, and a part of its upper surface is connected to the frame 43 and the upper cylindrical body 4.
This is the material transfer surface of the annular passage P formed between the 6 and 6. The annular passage P communicates with an upper sieve material discharge port 80.

Similarly, the outer periphery of the lower sieve screen 54 is folded over the annular frame 55, and the annular member 55 is applied to this, and the frame 55 is secured with bolts 57.
It is attached to. The annular member 55 is the middle cylindrical body 81
It is concentrically fixed to the lower end of the cylinder by welding, and a part of its upper surface serves as the material transfer surface of the annular passage P' formed between the frame body 55 and the middle cylinder body 81. The annular passage P' communicates with the sieve material discharge port 59 in the lower stage. In addition, since the frame 43 is interposed between the material transfer surface in the annular passages P, P' and the upper surface of the sieve nets 40, 54, the transfer surface of the annular passages P, P' is connected to the sieve net 40, 54. It is located below the top surface.

A ring-shaped rubber bushing 4 is provided between the upper annular member 45 and the flange portion 81a of the middle cylindrical body 81.
8 and 49, an annular angle member 47 is arranged, and in this embodiment, the outer peripheral portion of a guide member 42 corresponding to the guide member 9 of the conventional example is welded to this. Further, the outer peripheral portion of the punched metal 41, which corresponds to the punched metal 5 of the conventional example, is fixed to the guide member 42 with a bolt 51' via a member 50.

A ring-shaped rubber bushing 58 is provided between the lower annular member 56 and the flange portion 91a of the lower cylindrical body 91.
is under pressure. Tightening members 52, 82, 83 are fixed to the outer circumferential surface of the upper cylindrical body 46 at equal angular intervals, and the lower cylindrical body 9
1 also has a tightening member 53 (member 5 in FIG.
The cylinders 46, 81, 91 are integrated by tightening these members with bolts 51. Further, each rubber bushing 48, 49, 58 is compressed and functions as a packing. The drive unit and other configurations are the same as the conventional example shown in FIG.

The circular vibrating sieve machine according to the embodiment of the present invention is constructed as described above, and its operation will be explained next.

Although not shown, it is assumed that a sufficient amount of material is introduced from above. When the vibration motor 23 is driven, the upper cylindrical body 46, middle cylindrical body 81, etc. perform a composite vibration of circular vibration in the horizontal plane and linear vibration in the vertical direction. The angle between the unbalanced weights 24a and 24b is 0°, 15°, or 40°. The material on the screen 40 moves as shown in FIG. 10, spreads toward the outer periphery, and circulates around the outer periphery. The material is mainly subjected to a sieving action in the process of spreading toward the outer periphery.

The material circulating around the outer periphery and on the sieve is discharged to the outside through the discharge port 80, and the material below the sieve is introduced into the center of the sieve net 54 in the middle cylinder 81,
The material on the sieve is discharged to the outside from the discharge port 59 under the same action as that on the upper sieve screen 40.
The material under the sieve is discharged to the outside from the discharge port 90 at the lowest stage.

As long as the material is fed from above, the above-mentioned sifting action is carried out continuously, and each outlet 49,
Materials of various grain thicknesses are continuously discharged from 80 and 90.

The action described above is almost the same as the conventional example, but
This embodiment also has the following effects.

That is, the material on the sieve is the sieve mesh 40, 54.
The material at the outermost periphery falls into the annular passages P and P' and circulates around it. Since the material transfer surfaces of these passages P and P' are located below the upper surfaces of the sieve screens 40 and 54, the materials that have fallen into the passages P and P' are
All are discharged to the outside from the respective discharge ports 80 and 59.
The upper cylindrical body 46, the middle cylindrical body 81, and the annular member 45,
56 and is airtightly fixed by welding,
The material is reliably discharged from the predetermined discharge ports 80, 59 without leaking to the outside from the passages P, P' unnecessarily.

Furthermore, in the past, the space S corresponding to the paths P and P' was
In order to minimize the width of the passages P and P', the dimensional errors in the outer diameter of the frame to which the sieve screen is attached and the inner diameter of the upper or lower cylindrical bodies were severe, making machining difficult. Since it can be made large, dimensional errors do not need to be so severe, and processing of the frame 43 and the upper or lower cylinders 46, 81 becomes much easier.

FIG. 3 shows a second embodiment. In this embodiment, unlike the first embodiment, the upper cylindrical body 62 and the middle cylindrical body 86 are integrated by a tightening band 65 as in the conventional example. The sieve mesh 60 is attached to an annular frame 61 via an annular member 63 with bolts 64, as in the first embodiment. The annular member 63 has an L-shape and is welded to the upper cylindrical body 62, and its horizontal portion 63a and the flange portion 86a of the middle cylindrical body 86 are connected to the tightening band 65 via the rubber bush 66.
tightened by Frame body 61 and upper cylinder body 62
A passage P formed between the sieve and the sieve material discharge port 67 communicates with the sieve material discharge port 67.

FIG. 4 shows a third embodiment, and unlike the first embodiment, the upper cylindrical body 75 and the middle cylindrical body 76 are integrated by a tightening band 73 as in the conventional example. The sieve net 70 is attached to an annular frame 71 via an annular member 72 with bolts 87, as in the first embodiment. The annular member 72 is welded to the inner peripheral wall surface of the upper cylindrical body 75, and both flanges 75a and 76b of the upper cylindrical body 75 and the middle cylindrical body 76 are tightened by a tightening band 73 via a rubber bush 74. A passage P formed between the frame body 71 and the upper cylinder body 75 communicates with a sieve material discharge port 77.

It is clear that the second and third embodiments described above also have the same effects as the first embodiment.

Although each embodiment of the present invention has been described above,
Of course, the present invention is not limited to these, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the sieve net was provided in two stages to form a so-called two-stage sieve machine, but the number of stages is not limited to this and may be one stage or three or more stages.

〔Effect of the invention〕

As described above, according to the circular vibrating sieving machine of the present invention, material does not leak to the outside unnecessarily, so its processing capacity can be fully utilized to efficiently sieve materials, and dimensional errors can be minimized. Processing is easy because there is no need to make it strict.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway view of the main parts of a circular vibrating sieve machine according to the first embodiment of the present invention, Fig. 2 is a partially cutaway side view of the main parts, and Fig. 3 is a circular vibrating sieve machine according to the second embodiment of the present invention. FIG. 4 is a cross-sectional view of the main parts of a vibrating sieve machine according to a third embodiment of the present invention, and FIG. 5 is a partially cutaway elevational view of a conventional circular vibrating sieve machine. , FIG. 6 is a plan view of the same, FIG. 7 is a sectional view in the - line direction in FIG. 5, FIG. 8 is a sectional view in the - line direction in FIG. This figure and FIG. 10 are diagrams for explaining the same effect. In the figure, 40, 54, 60, 70...
Sieve net, 43, 55, 61, 71... frame, 4
5, 56, 63, 72... annular member, P, P'...
aisle.

Claims (1)

[Claims] 1. A circular vibrating sieve machine that sieves the material on the sieve net by vibrating a sieve net stretched almost horizontally on a cylindrical body using a vibrating electric motor installed almost perpendicularly to the sieve net. In,
An annular member is fixed densely and substantially concentrically to the cylindrical body, and an annular frame body for attaching the sieve net is fixed to the annular member, and an outlet for discharging the sieved material of the sieve net is provided. A communicating annular passage is formed between the frame body and the cylindrical body, a transfer surface for the material in the annular passage is an upper surface of the annular member, and the transfer surface is located below the upper surface of the sieve net. A circular vibrating sieve machine characterized by: