JPH0938579A - Screen frame of screening machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obstruct the mixing of a coarse powder into a fine powder by separating the coarse powder and the fine powder completely by improving only an inner frame without increasing costs. SOLUTION: A string-shaped seal member made of an elastic material is installed on the outer surfaces of at least three side walls 3b, 3c, 3d which do not face an opening 16 for a coarse powder among four side walls of an inner frame 1 inserted into an outer frame 8 equipped with the opening 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieve net frame of a sieving machine for sorting powders such as wheat flour according to particle size.

[0002]

2. Description of the Related Art As a sieving machine for selecting powders and granules, particularly wheat flour, according to the particle size, a large number of sieve nets are stacked and hung from the ceiling or supported from the floor with a support rod to balance weights. A so-called plan shifter, a square shifter, or a junior shifter in which a circular movement is performed on a horizontal plane by a driving means including an eccentric shaft and a driving shaft provided therein is widely used.

The sieve net frame of the above-mentioned sieving machine has an inner frame having an upper screen for separating the wheat flour into upper-mesh (coarse) and lower-mesh (fine) powders, and the inner frame. And the outer frame having an opening for supplying the powder to the next-stage sieve mesh frame, and the sieve mesh frame having such a structure. As such, there is a sieve frame for a powdery or granular material sieving machine disclosed in JP-A-6-320111. Regarding this sieve frame, FIG. 3 showing a perspective view of the inner frame as viewed from below,
This will be described with reference to FIG. 4 showing a perspective view of the outer frame. This sieve frame is provided with an inner frame 51 and an outer frame 52 for the purpose of preventing the coarse powder from flowing out from the space between the fitting portions of the inner frame 51 and the outer frame 52 and mixing the coarse powder into the fine powder. Sealing surfaces 55 and 56 are formed on the lower surface of the side wall 53 of the inner frame 51 and the upper surface of the supporting member 54 of the outer frame 52, which are engaging portions, respectively, and the sealing surface 55 of the inner frame 51 is formed.
By pressing the sealing surface 56 of the outer frame 52 into contact with each other,
It is described that the coarse powder is not allowed to flow into the gap between the inner frame 51 and the outer frame 52, and the coarse powder and the fine powder can be completely separated to prevent the coarse powder from being mixed into the fine powder.

However, in the above screen frame, it is necessary to form a sealing surface on both the inner frame and the outer frame.
If the outer frame you currently have does not have a support member that engages with the bottom surface of all the side walls of the inner frame, either attach a new support member to the outer frame or purchase a new outer frame. However, there is a problem that it is costly.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention improves the inner frame only to completely separate coarse powder and fine powder at low cost and to mix coarse powder with fine powder. It is a technical object to provide a sieve net frame of a sieving machine that can prevent the above.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an inner frame 4 fitted to an outer frame having an opening for coarse powder.
A string-shaped seal member made of an elastic body is provided on at least the outer surfaces of the three side walls that do not face the coarse powder opening.

Further, the seal member is formed so that the seal member and the outer frame are in line contact with each other.

Further, the sealing member is formed to have a round cross section, grooves are formed on the outer surfaces of the three side walls of the inner frame, and the round sealing member is fitted into the grooves. , Took the technical measure.

[0009]

[Operations and effects] At least the string-shaped seal member made of an elastic material is provided around the outer surface of the three side walls of the inner frame which does not face the coarse powder opening of the outer frame, so that the inner frame fits into the outer frame. At this time, the inner frame comes into close contact with the outer frame via the seal member,
The coarse powder on the sieve screen of the inner frame moves on the sieve screen without falling into the gap between the inner frame and the outer frame, falls from the coarse powder opening of the outer frame, and mixes with the fine powder that has passed through the sieve screen. There is nothing to do. Moreover, since the seal member softens the impact between the outer frame and the inner frame during the operation of the sieving machine, the durability of the sieving frame is improved. in this way,
Since the coarse powder and the fine powder can be completely separated by improving only the inner frame, the cost is low and the hand-held inner net can be easily improved.

Further, by forming the seal member so that the seal member provided on the inner frame and the outer frame are in line contact with each other, the contact area between the seal member and the outer frame can be reduced, and the inner frame to the outer frame can be reduced. It can be fitted and removed easily.

Further, the seal member is formed to have a round cross section, and grooves are formed on the outer surfaces of the three side walls of the inner frame, and the round seal member is fitted in the grooves to provide the seal member. The sealing member does not shift or come off during the fitting and removal operations of the inner frame to the outer frame or during the operation of the sieving machine.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 is an inner frame having a sieve screen 2 stretched on its upper surface, which is surrounded on four sides by wooden side walls 3a, 3b, 3c, 3d, and one of the four side walls 3 is a side wall 3a. Is formed to have a slight downward slope so that coarse powder flowing on the sieve net 2 can easily flow out of the inner frame 1. On the lower surface of the inner frame 1, a wire mesh 4 which is coarser than the screen 2 on the upper surface of the inner frame 1 is stretched. A cotton cleaner (not shown) or the like is placed between the wire 4 and the screen 2. By inserting it, it is possible to prevent clogging of the screen 2. Reference numeral 5 is a reinforcing plate for reinforcing the inner frame 1.

Of the four side walls 3, all side walls 3b, 3c, 3d except the inclined side wall 3a are formed with a groove 6 having a semicircular cross section on the entire outer surface length. A string-shaped seal member 7 made of an elastic material such as sponge or rubber and having a round cross section is fixedly installed.

The outer frame 8 is surrounded on four sides by outer walls 9. Inside the outer wall 9, two inner walls 10a, 10b are respectively located inside the two outer walls 9b, 9d facing each other. 9d
Are arranged so as to be parallel to the outer wall 9b and the inner wall 10a, and between the outer wall 9d and the inner wall 10b, for discharging the fine powder passing through the sieve net 2 to the outside of the outer frame 8. Each fine powder opening 11 is formed.

Reference numeral 12c is fixed to the outer wall 9c so that its upper surface engages with the lower surface of the side wall 3c of the inner frame 1 and receives the fine powder from the screen 2 on its lower surface to move it to the fine powder opening 11. Is a support member to which the bottom plate 13 is fixed, and the bottom plate 13 is fixed to the lower surfaces of the support member 12c, the support member 12a provided close to the outer wall 9a, and the rod-shaped body 14, and the inner wall 10a, A passage 15 for discharging fine powder is provided below 10b. A coarse powder opening 16 for discharging the coarse powder on the screen 2 to the outside of the outer frame 8 is formed between the support member 12a and the outer wall 9a.

Support members 12b and 12d are fixedly provided on the inner surfaces of the inner side walls 10a and 10b so as to be flush with the upper surfaces of the support members 12a and 12c.

Next, the state of the sieve screen frame when the inner frame 1 is fitted to the outer frame 8 will be described.

The side wall 3a of the inner frame is provided with the coarse powder opening 16 of the outer frame 8.
When the inner frame 1 is fitted into the outer frame 8 so as to face, the lower surfaces of the side walls 3a, 3b, 3c, 3d of the inner frame 1 respectively correspond to the support members 12a, 12b, 12c, 12d of the outer frame 8. The seal members 7a, 7b, 7c provided on the side walls 3b, 3c, 3d while engaging with the upper surface are respectively the inner wall 1 of the outer frame 8.
0a, the outer wall 9c and the inner wall 10b are in close contact with the inner surfaces.

With the inner frame 1 fitted to the outer frame 8, the sieve screen 2
When the granular material is supplied to the upper part, the fine powder that has passed through the screen 2 is received by the bottom plate 13, and while moving on the bottom plate 13, the passage 15
Through the fine powder opening 11 and discharged to the outside of the outer frame 8. Then, the coarse powder that does not pass through the screen 2 has side walls 3b, 3c, 3
d and the inner wall 10a, the outer wall 9c, and the inner wall 10b from the gap to move on the sieve net 2 without flowing out onto the bottom plate 13, pass through the side wall 3a, and from the coarse powder opening 16 to the outer frame 8 outside. Is discharged to.

In the above embodiment, the seal member 7 is provided on the three side walls 3b, 3c, 3d of the inner frame 1, but the seal member 7 may be provided around all the side walls 3. , In this case, the seal member 7 is formed in an endless shape,
It can be easily attached to the side wall 3 and can be prevented from falling off from the side wall 3 due to the contracting force of the seal member 7.

[Brief description of drawings]

FIG. 1 is a development view showing a state in which an inner frame and an outer frame are fitted together.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view of a conventional inner frame as viewed from below.

FIG. 4 is a perspective view of a conventional outer frame.

[Explanation of symbols]

 1 Inner Frame 2 Sieve Net 3 Side Wall 4 Wire Mesh 5 Reinforcing Plate 6 Groove 7 Sealing Member 8 Outer Frame 9 Outer Side Wall 10 Inner Side Wall 11 Fine Powder Opening 12 Supporting Member 13 Bottom Plate 14 Rod-like Body 15 Passage 16 Coarse Powder Opening

Claims (3)

[Claims] 1. A pair of a quadrangular inner frame having a sieve mesh and an outer frame to which the inner frame fits, the outer frame receiving fine powder passing through the sieve mesh of the inner frame. In a sieve mesh frame of a sieve machine provided with a bottom plate, an opening for facing fine powder for discharging fine powder on the bottom plate to the outside of the frame, and a coarse powder opening for discharging coarse powder on the sieve mesh to the outside of the frame, A screen mesh frame of a sieving machine, characterized in that a string-shaped seal member made of an elastic body is provided around at least the outer surfaces of the three side walls of the inner frame which do not face the coarse powder opening. 2. The sieve mesh frame of a sifter according to claim 1, wherein the seal member is formed so that the seal member and the outer frame are in line contact with each other. 3. The sealing member is formed to have a circular cross section, and grooves are formed on the outer surfaces of the three side walls of the inner frame, and the circular sealing member is fitted in the grooves. The sieve screen frame of the sieving machine according to claim 1 or 2.