JPS61278383A - Cereal lifting spiral body of cereals selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a grain sorting machine that separates and removes immature grains, broken grains, etc. while frying grains such as rice. The present invention also relates to a grain lifting spiral body that ascends and conveys grains.

[Conventional technology]

Conventionally, regarding this type of grain sorting machine, the
4269, JP 57-177381, JP 58-146475, JP 58-1535
This method has already been disclosed in Publication No. 62, Publication No. 156377/1983, and the like.

As shown in Fig. 6, these grain sorting machines have a cylindrical sorting IP4 body 2 and a grain lifting spiral body 3 fitted inside the sorting net body 2, which are rotatable and concentric with each other. The grains fried by the grain frying spiral body 3 fall onto the upper partition plate 15 from the discharge port 23a formed in the upper part of the sorting net body 2. The grains on plate 15 are
The outer shell 4 is removed by the scraping blades 16 fixed to the sorting net 2.
is transferred to an outlet 45 formed in a part of the upper outer periphery of the
It is designed to be guided into the storage tank 8 from the outlet 45.

The sorting net 2 used in these grain sorting machines is
It has a cylindrical shape composed of a lower tube 21, an intermediate mesh tube 22, and an upper tube 23, and a large number of meshes 22a are perforated in the entire area of the mesh tube 22 in an orderly manner in the direction of rotation. The sorting net 2 is connected to the drive shaft 6 at a joint portion 20. The drive shaft 6 extends inside the grain lifting spiral 3, has a lower end 6a connected to a motor M via a gear box G, and has an upper end 6b pivotally supported by the top plate 7.

Further, the lower cylinder 21 of the sorting net body 2 is rotatably supported by a guide roller 10 disposed on the upper end surface 51 of the particle receiving cylinder 5.

On the other hand, the grain lifting spiral body 3 has a spiral blade 32 provided on the outer periphery of a spiral shaft 31. The area facing the upper cylinder 23 is the extraction area 35, and the lowermost end of the supply area 33 is the scraping area 36. There is. The bottom plate 30 of the grain lifting spiral 3 is connected to a rotary disk 11 which is connected to a motor M via a gear box G, and the rotation of the rotary disk 11 causes the grain lifting spiral 3 to rotate around the drive m6.

The grains, for example, rice, which have been sorted by the grain sorter and stored in the storage tank 8, are weighed out in a certain amount and packed into bags. .

[Problem that the invention seeks to solve]

Incidentally, recently, the above-mentioned bagging work has been automated and carried out with high efficiency. Therefore, it is necessary to improve the grain supplying capacity of the grain sorter and to ensure a predetermined selection rate through one sorting with the grain sorter.

The grain feeding capacity of this grain sorter is determined by the amount of grain lifted per unit time (hereinafter referred to as grain lifting capacity) of the grain lifting spiral body 3. In order to improve the grain lifting capacity, the pitch of the spiral blades can be reduced. On the other hand, it is sufficient to increase the height of the spiral blade, that is, the difference in radius between the outer circumference of the spiral blade and the outer circumference of the spiral blade.

However, grain sorting machines need to sort grains at the same time, rather than simply transporting them. Therefore, if a 4# grain frying body with a small pitch of helical blades and a high helical blade is used, a problem arises in that the sorting accuracy decreases and crushed grains etc. cannot be sufficiently removed.

On the other hand, in order to improve the sorting accuracy, the shape of the main helical blade is
f: JP-A-59-145078 and! Japanese Patent Application Publication 1986-
As proposed in No. 7976, there are structures in which the blades are sloped downward or have a rake surface. However, by using these structures,
1. Although there is a slight improvement in sorting accuracy. There were also negative consequences, such as a decrease in the amount of grain being fried. Furthermore, it has been proposed that a resistor such as rubber which has a large sliding friction resistance is attached to the upper surface of the main spiral blade. For example, JP-A-59-3298
An example of this is disclosed in Public Law No. 5.

Although the mechanism of action of the resistor equipped with such a resistor is not clear, the selection accuracy is slightly improved compared to the resistor not equipped with the resistor.

However, if all the resistors, such as rubber, are attached, the friction with the grain is strong, so in the case of brown rice, for example, the bran layer may peel off, or the resistor itself may wear out, and the powder may be transferred to the grain. Along with this, there is the problem of contamination.

Of course, if such abrasion powder adheres to grains, it is not a big problem because the grains themselves are used after polishing, but it becomes unusable because powders such as rubber are mixed in with the bran. cause problems.

In this way, with conventional grain frying spirals, it is not possible to increase the grain lifting capacity without deteriorating the sorting accuracy, and it is not possible to improve the sorting accuracy without causing peeling or contamination of the outermost layer of grains. could not be improved.

The present invention has been made with attention to these problems, and it is possible to significantly improve grain frying performance and sorting accuracy, and to produce grains that do not cause peeling or contamination of the outermost layer of grains. The purpose of the present invention is to provide a sorting eye-fried grain spiral.

[Failure to solve the problem]

The present invention comprises a main helical blade on the outer periphery of a helical shaft, which is fitted concentrically and rotatably inside a cylindrical sorting net to constitute all the main parts of a grain sorting machine, Due to rotation,
It is applied to a grain lifting spiral body that uses a main spiral blade to convey all the grain upwards from the scraping area at the lowest end to the sorting area to the take-out area, and is characterized by having the following structural requirements as a means to solve the problem. Firstly, at least the portion of the main spiral blade existing in the sorting area is constituted by a blade having an oblique side, a stepped portion, and a horizontal portion in this order from the spiral shaft side toward the outside.

Second, a convex portion is provided on the upper surface of at least a portion of the main spiral blade that exists in the sorting area.

Thirdly, the gold film of the auxiliary spiral vane, whose starting end is at a different angular position from the starting end of the main spiral vane, is locally formed into multiple spirals 1'.
It will be fM construction.

Regarding the installation of the auxiliary spiral blade, the helical pitch at the lowest end j73K of the main spiral blade is set larger than the pitch in other areas, and this pitch enlarged portion is set at a different angular position from the starting end of the main spiral blade. It is also possible to provide a locally multiple spiral structure by providing an auxiliary spiral blade as a starting end.

Next, the above configuration requirements will be explained in more detail.

In the first component described above, the structure of the oblique side, the stepped portion, and the horizontal portion was able to obtain good effects in the following cases. However, it goes without saying that this configuration is experimentally set and is not limited to this range.

[First example]

Length of hypotenuse A = 21.2 mm Height of stepped portion T1 = 3.8 mm Length of horizontal portion B = 21.8 mm Angle of hypotenuse α1 = 45.22 degrees [Second Example] Angle α', = 45.0 degrees, etc.? In addition, in the second component, which is the same as the first embodiment, the convex portion provided on the upper surface of the main spiral blade may be, for example, hemispherical or protruding. These are easily formed by pressing or the like when forming the main spiral blade. Although the position where it is formed is determined by the selection of the main helical blade, it may be extended to other areas.

In the case of a hemisphere, they are arranged discretely or regularly distributed. On the other hand, in the case of protrusions, they are usually arranged radially or concentrically.

For example, in the embodiment, the above-mentioned protrusions are arranged at intervals of six per sheet, that is, one per 60 degrees. Of course, it is not limited to this range, but if they are arranged too closely, the sorting action will be too strong, and the sorted grains will often be treated as waste grains.

On the other hand, if the interval is too large, the effect of the convex portion will be weakened.

For example, in the case of a hemisphere, the appropriate size of the convex portion is such that the radius is about 2 to 6 times the short axis of the grain. Further, the protrusion height is suitably within twice the breadth of the grain. However, the size is not limited to this range.

Note that it is preferable that the outer peripheral end of the convex portion is not aligned with the outer periphery of the spiral blade, but is provided at a position inside with a slight distance from the outer periphery.

In the third component, the auxiliary spiral blade is provided in the valley of the main spiral blade in the pitch range or the pitch expansion range, and its installed length is set not to exceed the pitch expansion range. For example, if the pitch is increased within the range in which the main spiral blade rotates around the helical axis, the auxiliary spiral blade is provided with a maximum length that extends around the spiral l'Iq11. Normally 1 is about half a turn.

In addition, in the third component, the angular position of the terminal end of the auxiliary spiral blade on the outer periphery of the helical shaft is beyond the angular position of the starting end of the adjacent main spiral blade or the auxiliary spiral blade on the outer periphery of the helical shaft. Set. This constitutes a local multiple helix structure.

This multiple spiral structure is a state in which two or more spiral blades are provided in the same region.

Therefore, the number of auxiliary spiral blades may be one or more, but one to two is appropriate. In this case, it is standard that the mounting positions of the starting ends are arranged at equal intervals including the starting end of the main spiral blade.

In addition, when attaching an auxiliary helical blade by increasing the pitch at the lowest end of the main helical blade, the range in which the pitch is set to a larger value is generally the range in which the main helical blade goes around the helical axis from the starting end at the lowest end. position, that is, about one pitch.

Of course, the range may be less than one pitch or may be more than one pitch.

Further, the pitch expansion rate is related to the number of auxiliary spiral blades, that is, the multiplicity, which will be described later, and is increased as the number of auxiliary spiral blades increases. For example, in the case of a double helix structure, the pitch is typically about 1.5 to 2.5 times the pitch of other regions. It goes without saying that this magnification rate is set experimentally and is not limited to this range.

[For production]

With the above configuration, at least the small portion of the main spiral blade that exists in the sorting area is provided with the oblique side, the stepped portion, and the horizontal portion in this order from the spiral shaft side outward, and the convex portion is provided on the upper surface of the horizontal portion. By providing this, grain sorting accuracy and grain frying performance are improved. The mechanism of its action is not necessarily clear, but it is thought to have an effect on sorting accuracy. The grains that have slid down the hypotenuse (surface) turn over at the step, are arranged in the horizontal section, and are pressed against the sorting net at the convex section. This is thought to be due to being screened and selected.

In addition, the ability to fry shells is improved due to the above-mentioned Japanese Patent Application Laid-Open No. 59-1
As disclosed in No. 45078, if only the oblique side (face) is used, the amount of grains lifted does not increase because many grains fall directly downward from the tips of the blades. It is thought that if the grain is mounded and then turned over and arranged in a horizontal part, the amount of grain lifted will increase because the grain is not directly affected by the falling blade because of the horizontal part. The multiple helical structure allows for multiple times more efficient scratching than a single helical blade.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. Note that the same parts as in the conventional example are given the same reference numerals.

<Configuration of Example> The grain frying spiral body of the present invention shown in FIGS. 1A to 5 has a main spiral blade 32a and an auxiliary spiral blade 32 on the outer periphery of a cylindrical spiral shaft 31
b.

The main helical blade 32a extends from the upper part of the helical shaft 31 into the extraction area 35.
, the sorting area 34, the supply area 33, and the raking area 36 are successively provided by one spiral blade, and the basic configuration is the same as the spiral blade of the conventional grain frying spiral body. be. The difference from the conventional one is the scraping area 36 and the sorting area 34.

In addition, in the scraping region 36, the pitch L1 of the main spiral vane 32a at the lowermost end is the same as or twice the pitch L3 in other regions.

An auxiliary spiral blade 32b is provided in the valley at the lowest end.

In the case of this embodiment, the auxiliary spiral blade 32b is located in the middle part of the valley of the main spiral blade 32a in the scratch area 36.
There are approximately 100 square feet of space. As a result, the helical blade has a double helical structure in this part.

In this way, by adopting the double helical structure, the starting ends of the helical blades are at two locations, so that the grain can be raked up at two locations.

The starting end of the auxiliary spiral blade 32b is connected to the main spiral blade 32. The angular position is set so that the phase is shifted by 180 degrees with respect to the starting end of + (C. In other words, if the starting end of the main spiral blade 32a is at a position of 180 degrees, the starting end of the auxiliary spiral blade 32b is at a position of 0 degrees. The settings are as follows.

Also, as shown in the figure, the main spiral feather 1j! In 32a, the pitch changes midway through.

On the other hand, the terminal end 38 of the auxiliary spiral blade 32b is connected to the main spiral blade 3
Settings 1 to 1 are provided so as to exceed the angular position of the starting end of 2'a. That is, when the starting end of the main spiral blade 32a is at a position of 180 degrees as described above, the terminal end of the auxiliary spiral blade 32b is set to be beyond this angular position, for example, at a position of 190 to 200 degrees. Ru.

The main spiral blade 32a and the auxiliary spiral blade 32b have the same outer circumferential diameter.

In addition, the raking area 36 of the main spiral blade 32a and the auxiliary spiral blade 3
2b are both attached to the helical shaft 31 at the same attachment angle. In the case of this embodiment, it is set parallel to the radial direction of the helical axis 31, that is, set at 0 degrees.

Note that the starting ends of the main spiral blade 32a and the auxiliary spiral blade 32b (
(The raking claws 37a and 37b are provided respectively.

Furthermore, the main helical blade 32a is provided with an inclined part 321 having a slope with respect to the radial direction of the helical shaft 31 on the inner peripheral side in the sorting area 34, and the end of this inclined part 321 is connected to the helical shaft 3.
1 to form a stepped portion 323, and on the outer peripheral side,
A horizontal portion 322 is provided parallel to the radial direction of the helical shaft 31.

The main spiral blade 32a is shown in FIG. 3 (4) (Bl, 4
As shown in the figure, a horizontal portion 322 in the sorting area 34
A convex portion 320a is provided on the upper surface. In this example,
As shown in FIG. 5, the convex portion 320a is formed by pressing down the metal plate forming the main spiral blade 32a from the lower surface side and protruding semispherically toward the upper surface side. This hemisphere “punch diameter R”
is approximately 3 mm.

In this embodiment, one convex portion 320a is provided on one of the main spiral blades 32a.
Six pieces are arranged for each round so that the circumference is roughly divided into six equal parts. The arrangement position is near the outer periphery of the horizontal portion 322. In the case of this embodiment, it is provided at a location slightly inside from the outer periphery. The width S1 and the protrusion height S2 are appropriately set through experiments, but in this example, both are 3 mm.

Next, the main spiral blade 32a extending from the raking area 36 to the supply area 33 does not have an inclined part 321 and is comprised only of a horizontal part 322.

Further, the auxiliary spiral blade 32b also has no inclined portion 321 and is comprised only of a horizontal portion 322, as described above.

<Effect of the embodiment> Next, the operation of the above embodiment will be explained.

The grain lifting spiral body of the above embodiment can be applied to the grain sorting machine shown in FIG.

In order to fry the grains using the grain lifting spiral of the above embodiment installed in the grain sorting machine shown in FIG. On the other hand, rotate the motor Mlt and drive #0 through the gear
116, and the rotary disk 11 is rotated. This turntable 11
Due to the rotation of , the grain frying spiral body 3 rotates around the drive @6, and the rotation of the drive 1 pongee 6 causes the sorting net body 2 to rotate.
rotates.

Due to the rotation of the grain lifting spiral body 3, in the raking region 36, the raking claws 37a of the main spiral blade 32a and the auxiliary spiral blade flit:
The grains supplied into the grain receiving cylinder 5 are scraped up by the scraping claws 37b of 12b. Moreover, since this part has a double spiral, it will scoop up nearly twice the amount of grain as usual.

Since the terminal end 38 of the auxiliary spiral blade 32b is provided beyond the angular displacement It of the starting end of the main spiral blade 32a, the grains scraped up by the auxiliary spiral blade 32b are It falls at the terminal end 38 of 32b, but always falls onto the main spiral blade 32a. Therefore, it is possible to prevent a reduction in the amount of grains lifted due to grains falling to the bottom of the grain receiving tube 5.

The feed area 33 further transports the raked grains upward and sends them to a sorting machine 34.

In sorting zone 3 = 1, the grains hit the mesh tube 22 due to the action of centrifugal force, and fine grains smaller than the mesh 22a are sieved out to the outside of the mesh tube 22 and fall onto the horizontal partition plate 12. It is transferred to the discharge port 42 by the scrapers 41N and 13, and is discharged to the outside.

At this time, the inclined part 321 and step part 323 of the main spiral blade 32a
, the horizontal portion 322 and the convex portion 3 provided on the horizontal portion 322
20 Due to the grains being subjected to various actions such as inversion and stirring,
The fine grains are pressed by the mesh body 2, making it easier for fine grains to pass through the mesh 22a, and the grains that do not pass through the mesh 22a are replaced with other grains. Therefore, the sorting efficiency in the mesh 22a is improved.

In this way, grains larger than the mesh 22a of the mesh tube 22 remain and are lifted up in the sorting area 34;
It is supplied and conveyed to.

The grains fried to the top of the extraction area 35 are transferred to the opening 2.
3a and is discharged into the storage section of the hopper 8 and stored.

As described above, the grain sorting machine having the grain frying spiral of the present invention has high grain frying performance and sorting accuracy, and therefore, a specific experimental example thereof will be shown below.

Experimental example First, the experimental conditions will be shown.

However, conventional products... conventional sorting machines that use a grain frying spiral.

Invention: A sorting machine using the grain frying spiral of the present invention.

(al) Grain sorting machine used in the experiment Exactly the same format except for the grain frying spiral part.

(b) Structure of the raised shell spiral Conventional product Invention (1) Invention (2) Length of helical shaft 950mm 950mm 950mm Diameter of helical shaft 190mm 190mm 1.90
mm Main helix Main screw outer circumference diameter 266mm 266mm
266mm main helical blade winding number 19 turns 18 turns
18 rounds main helical blade pitch L3 50mm 50mm
50mm main helical blade pitch L1 50mm LO
Omm 50mm auxiliary spiral blade winding number None Approx. 0.5 turns Approx. 0.5, I to double helix pitch L2
50mm 25mtn Number of protrusions per round in 25mtn sorting band 0 pieces 6 pieces 6 pieces (c) Test brown rice paddy rice moisture content 152% 0 times under the above conditions The results of repeated experiments are as follows.

stomach. Amount of grain lifted (travel per hour) Conventional product Average 2334 kq/1 (Invented product (1) Average 2851 kg/I1 Invented product (2) Average 2718 kg/+ (9) Sorting accuracy ■ Selection rate Conventional product Invented product <1 ) Invention 121 First quality rice rate
98.0% 990chi 98.7% first waste rice rate
2.0chi 1.0chi 1.3%Nibanro good rice rate
82chi 8.2 section 82% second ro waste rice rate 91
．． 8% 91.8% 91.8chi rate Waste rice No. 2 outlet 65.30% 81.92chi・[It is 2.

As is clear from the above experimental results, the double helix structure fried grain spiral according to the present invention? If used, the sorting rate and the amount of grains lifted will increase, and if the convex portion is provided, the first quality wood rate and the waste rice sorting rate at the second port will increase, and the sorting accuracy can be improved.

〔Effect of the invention〕

As explained above, the present invention provides a husk-lifting helical body that uses the main helical blade to lift grains from the raking area at the lowest end to the sorting area to the take-out area by rotating the helical shaft. (, Ar consists of one side, a stepped part, and a horizontal part,
Sorting accuracy and grain lifting performance are improved by providing an auxiliary spiral blade whose starting end is at a different angular position from the starting end of the main spiral blade, creating a locally multiple spiral structure, and by providing a convex portion on the main spiral blade. It has an improving effect.

[Brief explanation of the drawing]

Figures 1 (4) to 5 show an embodiment of the lifted shell spiral body of the present invention, Figure 1 is a front view thereof, Figure 1B is a left side view thereof, and Figure 2 is an embodiment of the above-mentioned embodiment F11. Enlarged developments 1 and 4 showing the scratching area of the grain-lifting spiral; Figure 3 is a partial enlarged sectional view showing the convex portion provided on the main spiral blade; Figure 3 (B) is its plan view; FIG. 5 is a partially enlarged sectional view of the main spiral blade, FIG. 5 is an enlarged sectional view of a convex portion, and FIG. 6 is a sectional view showing a grain sorting machine equipped with a conventional grain lifting spiral.

Claims (1)

[Scope of Claims] 1. A grain sorting machine comprising a main helical blade on the outer periphery of a helical shaft, which is concentrically and rotatably fitted inside a cylindrical sorting net, and constitutes the main part of a grain sorting machine; In a grain lifting spiral body that uses a main spiral blade to transport grain upward from a scraping area at the lowest end to a sorting area and a take-out area by rotating a spiral shaft, at least a portion of the main spiral blade that exists in the sorting area is ,
From the helical shaft side toward the outside, the blade is composed of an oblique side, a step part, and a horizontal part, and a convex part is provided on this blade, and at the lowest end of the main spiral blade, the starting end of the main spiral blade is formed. 1. A grain lifting spiral body for a grain sorting machine, characterized in that an auxiliary spiral blade is provided with a starting point at a different angular position from that of the grain sorter, and has a locally multiple spiral structure. 2. The grain lifting spiral body for a grain sorting machine according to claim 1, wherein the auxiliary spiral blade is provided in a pitch enlarged portion that is larger than other areas at the lowest end of the main spiral blade.