JP2530151Y2 - Sieve mesh - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieve mesh used for sorting raw materials such as grains.

[0002]

2. Description of the Related Art Generally, cereals such as soybeans, sunflowers and corns and other industrial raw materials are considered to be of high quality if the raw materials have the same size and shape. For example,
When used as a raw material for miso, soy sauce, and the like, if the particle size of the raw material particles is uniform, the processing time, the processing temperature, and the like are favorably maintained, so that the yield is improved and a high-quality product is obtained. For this reason, when shipping the raw materials, the raw materials are sorted into relatively uniform particle sizes by a sorter. Conventionally, as a sieve net used for such a sorter, a sieve having a large number of through holes as meshes formed at regular intervals in a flat plate made of metal is known. The through-hole formed by press working or the like is perpendicular to the plate surface and has a constant hole diameter. At the time of sorting the raw materials, vibration is applied by a vibrator or the like to make the raw materials easily pass.

[0003]

However, according to such a conventional sieve network, if the size and shape of the raw material particles vary widely, clogging is likely to occur, and the raw material is accumulated on the net and the sorting machine is used. Sieving efficiency tends to be poor. For this reason, the operator must clean the mesh every predetermined time, and there is a problem that the sorting operation becomes complicated. For example, when performing a sorting operation while applying vibration with a vibrator or the like, the operator checks the mesh every 30 minutes to 60 minutes, for example, stops clogging if there is clogging, and cleans the mesh with a brush or the like. I was In contrast, Japanese Patent Application Laid-Open No. Sho 60-161
As disclosed in Japanese Patent Application Laid-Open No. 778, the edge of the drop transmission hole is covered.
Clogging due to the shape of the sieving material falling in the direction of travel
There is something that prevents it. However, this
Some types of technology are mainly used for sieving coal, ore, etc.
Because the sieve surface is used at an angle close to horizontal,
It makes it easier to discharge the material clogged in the holes above the sieve surface
As shown, the entire surface of the hole is inclined in the
(See FIGS. 2 and 3 of the same publication).
When forming a transmission hole with a corner, press work etc.
Is difficult and difficult to manufacture.
I was Therefore, the present invention has been made to solve such a problem, by reducing clogging of meshes by raw material grains and enabling quick sorting, so as to greatly increase work efficiency, Moreover, through holes for sorting
It is an object of the present invention to provide a sieve net that can be easily formed by, for example, a wool process.

[0004]

For this purpose, the sieve mesh of the present invention is provided in the raw material passage of the sorter so as to be inclined with respect to the horizontal direction.
A plurality of sieves in a direction perpendicular to the sieve surface of the sieve.
And a downstream side of the sieve surface of the through hole.
On the hole wall surface, an inclination angle of 20 ° to 60 ° with respect to the sieve surface.
Formed by cutting or pressing
It is characterized by having. Further, the inclined surface is provided with the through hole.
From one end opening to the other end opening at a constant inclination angle
It is characterized by being formed. Here, the slope
The reason for setting the inclination angle to 20 ° to 60 ° is that the raw material particles
This is for facilitating smooth guidance to the lower side.

[0005]

According to the sieve screen of the present invention, when sieving the raw material particles , an inclined surface is formed on the downstream side wall surface of the through hole as a mesh, so that the raw material particles are guided by the inclined surface and smoothly pass through the through hole. Fall. Therefore, the raw material particles are less likely to stagnate in the through holes, and are less likely to be clogged. In addition, the through hole is
Form an inclined surface so as to be connected to a part of the surface perpendicular to
Because of this, it is easy to form holes by press working etc.
It becomes a thing.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a sieve net according to this embodiment. The sieve mesh 1 has a plurality of through holes 5 as meshes formed on a flat plate 3 made of stainless steel or the like. The through holes 5 are formed at equal intervals in the vertical and horizontal directions in FIG. 2, and are arranged such that adjacent through holes 5 are alternately arranged. 1 and 2
Thus, a material passage is formed from the upper side to the lower side of the inclined surface 7.
And Then, on the hole wall surface on the downstream side of each through hole 5 ,
An inclined surface 7 is formed. The flat plate 3 is, for example, a rectangle,
It is cut into a circle or the like, and the plate thickness L1 shown in FIG. 1 is, for example, about 3 to 5 mm. A frame made of metal or the like is fixed to the outer peripheral end of the flat plate 3 by welding or the like. Through hole 5
Is selected according to the size of the raw material particles to be sorted. For example, when the sieve mesh 1 is used for selecting corn raw materials, the pore size is set to about 5 to 10 mm. A portion of the hole surface of the through hole 5 except the inclined surface 7 is formed in a direction perpendicular to the plate surfaces 9a and 9b.

[0007] As shown in FIG.
Is formed with an inclination angle θ with respect to the plate surfaces 9a and 9b from the opening at one end to the opening at the other end. The through-hole 5 is formed such that the cross-sectional area thereof decreases from the plate surface 9a toward the plate surface 9b. The cross section of the inclined surface 7 is formed in an arc shape, and the arc length decreases from the plate surface 9a toward the plate surface 9b. Inclination angle θ is set in the range of 20 ° to 60 °
Is done. Each inclined surface 7 is formed such that the diameter of the through-hole 5 decreases from the bottom to the top in FIG. This is in order to correspond to the direction in which the raw material particles slide down, as described later.

When the sieve mesh 1 is manufactured, for example, a pilot hole is formed on a flat plate cut into a predetermined shape using a press machine or the like.
Next, the surface of the prepared hole is cut off from a predetermined direction by an end mill or the like. Next, burrs remaining on the flat plate are polished. Further, as another manufacturing method, after the pilot hole is formed by the first press machine, the inclined surface may be formed by the second press machine.

When the sieve mesh 1 of the above embodiment is used, as shown in FIG. 1, the sieve mesh 1 is inclined at a predetermined angle with respect to the horizontal direction so that the inclined surface 7 is on the lower side, and the raw material is placed on the plate surface 9a. Slide. Then, the raw material particles are passed from the plate surface 9a to the plate surface 9b. Then, the raw material particles remaining on the plate surface 9a side are collected as a sieve, and the raw material particles passing through the through hole 5 on the plate surface 9b side are:
Collected under the sieve. According to the sieve mesh 1, when the raw material particles slide down, they first collide with the inclined surface 7, and are then guided to the inclined surface 7 when the raw material particles pass through the through-hole 5,
It passes through the through-hole 5 smoothly and does not easily cause clogging.

Next, a sorting machine using the sieve mesh 1 according to the embodiment will be described with reference to FIGS. As shown in FIG. 3, in the sorting machine 10, a frame 14 having a predetermined length is hung by a support arm 16, 17 on a frame 12 made of iron or the like. A raw material introduction gate 18 is provided at a high position side end of the frame body 14 attached so as to be inclined at a predetermined angle, and an upper sieve recovery gate 22 and a lower sieve recovery gate 24 are provided at a low position side end. Is provided. The sieve screen 1 for sieving the raw material grains is fixed to the bottom of the frame 14. The raw material particles introduced from the raw material introduction gate 18 are sieved by the sieve net 1 and fall to the above-screen recovery gate 22 or the below-screen recovery gate 24.

In the frame 14, a lid 26 and a tray 28 are fixed to a side plate 25 fixed to face a predetermined width. Lid 2
The lower end of 6 is provided with a door 30 overlooking the on-screen recovery gate 22, and the upper end of the side plate 15 is provided with a door 32 for checking clogging of the sieve mesh 1. Frame 14
Is set to, for example, about 15 ° with respect to the horizontal direction. The sieve mesh 1 is fixed such that the inclined surface 7 is located on the lower side of the frame. This is because, as described above, when the raw material particles slide down on the sieve mesh 1, they are easily guided on the inclined surface 7.

The support arms 16 and 17 are fixed to the outer wall of the side plate 25 by fixing plates 34 and 35. Support arm 1
By adjusting the lengths of 6, 17 the inclination angle of the frame 14 is adjusted. The support arms 16 and 17 are provided with the connecting device 3
6, 37 are provided, and support the frame body 14 movably in the length direction. A vibrator 40 is provided below the frame 14. The vibrator 40 transmits the driving force of the driving motor 42 to the pulley 46 by the belt 44 and vibrates the frame 14 by the connecting arm 48.

During operation of the separator 10, raw material particles are introduced from the raw material introduction gate 18 at a predetermined flow rate, and the frame 14 is vibrated by the vibrator 40. At this time, the raw material particles slide down on the sieve net 1 due to gravity, and those having a small particle diameter pass through the through-hole 5 and fall from the tray 28 to the under-sieving recovery gate 24, and those having a large particle diameter It falls into the on-screen recovery gate 22 without passing through the hole 5. Thereby, the raw material particles are sieved. According to the sorter 10, the raw material particles are guided by the inclined surface 7 and pass through the through holes 5, so that the raw material particles are hardly clogged in the sieve mesh 1, and the operator does not need to clean the mesh during operation. Therefore, a large amount of raw material particles can be continuously sieved without stopping the operation of the sorting machine 10, and the sorting operation is completed in a short time.

Next, the sieve mesh according to the above embodiment was subjected to a comparative test of clogging using corn raw materials. The sieve net used as a comparative example has no inclined surface formed in the through hole. In both the examples and the comparative examples, the mesh of the sieve mesh was set to a round hole with a diameter of 6 mm. In the comparative test, the sieves according to the examples and the comparative examples were attached to a sorting machine, sieved using a vibrator, and samples on the sieve were taken at predetermined time intervals. Then, the ratio of the sample under the 6.1 mm sieve was measured. In addition, each sieve net is a series of three screens, and vibrators are installed on the second and third sheets. Table 1 shows the results.

[0015]

[Table 1]

As shown in Table 1, in the case of the sieve mesh according to the comparative example, clogging occurred in the sieve mesh with the passage of time, and it became difficult for small sieves to pass through the sieve mesh. The ratio under the 6.1 mm sieve in the above) was 3.30% at the start, but after 3 hours, the ratio was 6.30%.
Increased to 29%. On the other hand, in the case of the sieve net according to the example, even after 3 hours from the start, the ratio of the sieve under the 6.1 mm sieve slightly increased and was within the range of 1%. That is, almost no clogging occurred in the sieve net. As described above, the sieve mesh of the above example was less likely to cause clogging, and was able to reliably screen the raw material particles.

In the above embodiment, the through holes are arranged at uniform intervals in the vertical and horizontal directions in FIG. 2, but the intervals in each direction can be changed as required.

[0018]

As described above, according to the sieve net of the present invention, the sieve surface is provided on the downstream side of the vertical through hole as a mesh.
On the other hand, an inclined surface with a predetermined inclination angle is pressed
The following excellent effects are obtained due to the configuration of forming
be able to. (A) The raw material particles easily pass through the mesh and clogging of the mesh
Sorting operation can be performed efficiently and in a short time.
Can be implemented. (B) Hands for cleaning and checking meshes when sorting raw materials
The interval can be simplified. (C) Through holes and inclined surfaces as meshes are relatively easy
Can be easily manufactured.
Thus, manufacturing costs can be reduced. (D) The reliability of sorting is improved, and raw materials of excellent quality are provided.
Can be offered.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating a sieve net according to an embodiment of the present invention.

FIG. 2 is a partial plan view showing a sieve net according to an embodiment of the present invention.

FIG. 3 is a side view showing the sorting machine according to the embodiment of the present invention;

FIG. 4 is a front view showing a sorting machine according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sieve net 3 Flat plate 5 Through hole 7 Inclined surface 9a, 9b Plate surface (screen surface) θ Incline angle

Claims (2)

(57) [Scope of request for utility model registration] 1. A raw material passage of a sorter is inclined with respect to a horizontal direction.
A sieve screen provided perpendicular to the sieve surface of the sieve screen
While forming a plurality of through holes in the direction,
20 ° to 60 ° with respect to the sieve surface on the hole wall surface on the downstream side of the sieve surface
Cutting or pressing of inclined surfaces with different inclination angles
A sieve mesh characterized by being formed more. 2. The method according to claim 1, wherein the inclined surface has an opening at one end of the through hole.
From the other end opening at a constant inclination angle
The sieve net according to claim 1, characterized in that: