JPH0323337Y2 - - Google Patents

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. This invention relates to a grain lifting spiral body that ascends and conveys grains.

[Prior art] Conventionally, regarding this type of grain sorting machine,
It has already been disclosed in JP-A No. 59-14269, JP-A-57-177381, JP-A-58-146475, JP-A-58-153562, and JP-A-58-156377.

These grain sorters, as shown in Figure 6,
A cylindrical sorting net 2 and a grain frying spiral 3 fitted inside the sorting net 2 are erected in an outer shell 4 concentrically and rotatably with each other.
The fried grains fall onto the upper partition plate 15 from the discharge port 23a formed in the upper part of the sorting net 2, and the grains on the partition plate 15 pass through the scraper fixed to the sorting net 2. The grains are transferred to a take-out port 45 formed in a part of the upper outer periphery of the outer grain body 4 by the wing 16, and guided into the storage tank 8 from the take-out port 45.

The sorting net body 2 used in these grain sorting machines has a cylindrical shape composed of a lower tube 21, an intermediate screen tube 22, and an upper tube 23, and the entire area of the screen tube 22 has a mesh 22a. A large number of holes are arranged in an orderly manner in the direction of rotation. This sorting net 2 is connected to the drive shaft 6
are connected to each other at a joint portion 20. The drive shaft 6 extends inside the grain lifting helix 3, has a lower end 6a connected to a motor M via a gearbox 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 grain receiving cylinder 5.

On the other hand, the grain lifting spiral body 2 has a spiral blade 32 provided on the outer periphery of a spiral shaft 31. Select area 34
In addition, the area facing the upper cylinder 23 is the extraction area 35.
Furthermore, the lowermost end of the supply area 33 is used as a scraping area 36, which is divided into action areas. The bottom plate 30 of the grain lifting spiral 3 is connected to a rotary disk 11 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 shaft 6.

The grains are sorted by the grain sorter mentioned above and stored in the storage tank 8.
The stored grains, such as rice, are weighed in a certain amount and packaged in bags.

[Problems to be solved by the invention] Recently, the above-mentioned bagging work has been automated and performed 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 supplying capacity of this grain sorting machine is the amount of grain lifted per unit time of the grain lifting spiral 3 (hereinafter referred to as grain lifting capacity).
Determined by In order to improve grain lifting performance, the pitch of the helical blades may be reduced, and the height of the helical blades, that is, the difference in radius between the outer periphery of the helical blades and the outer periphery of the helical shaft, may be increased.

However, grain sorting machines need to sort grains at the same time, rather than simply transporting them. Therefore, if a grain frying spiral 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 spiral blade was
As proposed in No. 7976, there are structures such as a downwardly sloped blade or a rake surface. However, by adopting these structures, although a slight improvement in sorting accuracy was observed, opposite effects such as a decrease in the amount of grain to be lifted also occurred. Furthermore, it has been proposed that a resistor such as rubber having a high sliding friction resistance is attached to the upper surface of the main spiral blade. For example, in Japanese Patent Application Laid-open No. 59-32985,
An example is disclosed.

Although the mechanism of action of the device provided with such a resistor is not clear, the selection accuracy is slightly improved compared to the device without the resistor.

However, when a resistor such as rubber is attached, the friction with the grain is large, so in the case of brown rice, for example, the bran layer may peel off, or the resistor itself may wear out.
There is a problem in that the powder adheres to grains and contaminates them.

However, if such abrasion powder adheres to grains, the grains themselves are polished and used.
Although this is not a serious problem, powders such as rubber are mixed with sugar, which causes the problem that it becomes unusable.

In this way, with the conventional grain frying spiral, it is not possible to improve grain frying without deteriorating sorting accuracy, and it is not possible to improve sorting accuracy without causing peeling or contamination of the outermost layer of grains. I couldn't do it.

The present invention was developed with a focus on 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 grain frying spiral for a sorting machine.

[Means for Solving the Problems] The present invention is a grain sorting machine that has a main spiral blade on the outer periphery of a spiral shaft, which is fitted concentrically and rotatably inside a cylindrical sorting net. constitutes the main part of
In a grain lifting spiral body in which grains are conveyed upward from a rake-up area at the lowest end to a sorting area to a take-out area using a main spiral blade by rotation of a helical shaft, the main spiral exists over almost the entire area of the grain lifting spiral body. The blade is composed of an inclined part, a step part, and an inclined part extending outward from the helical axis, and triangular convex parts are provided on both the inclined parts, and the number of the convex parts is equal to the number of the convex parts on the helical axis. The number of inclined parts closer to the helical axis is greater than the number of inclined parts farther from the helical axis, and the convex part is formed with a triangular apex facing the outer periphery, and the inclined part is formed at an angle of the inclined part farther from the helical axis. is made slightly larger than the inclined part near the helical axis, and an auxiliary spiral blade is provided whose starting end is at a different angular position from the starting end of the main spiral blade, thereby creating a multiple spiral structure over the entire area of the grain-frying spiral body. The spiral blade is also present in the grain lifting spiral body of the grain sorter, which is constituted by the above-mentioned inclined portion, stepped portion, and inclined portion.

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

In the above structural requirements, the structure of the slope part, step part, and slope part 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.

[Example] Length of the inclined part A = 23.0 mm Height of the stepped part H = 11.0 mm Length of the inclined part B = 15.0 mm Angle of the inclined part α ₁ = 12.15 degrees Angle of the inclined part α ₂ = 15.00 degrees Above In the configuration, the convex portions provided on the upper surfaces of the main spiral blade and the auxiliary spiral blade (hereinafter simply referred to as the main spiral blade) have a triangular shape and can be easily formed using a press or the like when forming the main spiral blade. The position where it is formed is provided over almost the entire area of the main spiral blade, that is, the scraping area (approximately 1/4 circumference from the starting end of the main spiral blade), the supply area, the sorting area, and the take-out area. .

The arrangement interval of the above-mentioned convex parts is, for example, in the embodiment, 12 protrusions are arranged per sheet on the inclined part close to the helical axis, that is, 1 convex part is arranged at every 30 degrees, and 6 protrusions are arranged on the inclined part far from the helical axis.
In other words, one is placed every 60 degrees. Of course, it is not limited to this range, but if they are arranged too closely, the sorting effect becomes too strong and the sized grains are often 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 embodiment (FIG. 3B), the size of the convex portion is an equilateral triangle inscribed in the diameter D=14 mm, and the height Y is 3 mm. However, the size is not limited to this range.

Further, as shown in FIGS. 3A and 3B, the convex portion may be provided at a position where the outer circumferential side end portion thereof is not aligned with the outer circumference of the spiral blade, but is located inside with a slight distance from the outer circumference. desirable.

Further, the convex portions are arranged with the apexes of the triangle facing the outer periphery, as shown in FIGS. 3A and 3B.
In addition, if the triangle is arranged with the oblique side facing the outer periphery as shown in Figure 3C, the load (resistance) during sorting will be reduced.
increases, and as a result, the current value of the motor also increases, causing the skin of grains to shift during sorting.

In the above configuration, the auxiliary spiral blade is provided in the valley of the main spiral blade in the pitch range, and its length is arranged over the entire area of the grain lifting spiral. In other words, it becomes a double helix. The number of auxiliary spiral blades to be installed may be 1 or more, but 1 to 1.
Two sheets (double to triple) are 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.

[Function] As in the above configuration, the main spiral blade and the auxiliary spiral blade that are present in almost the entire area of the grain lifting spiral are formed with an inclined part, a step part, and an inclined part outward from the spiral axis, A triangular convex portion is provided on both of the inclined portions, and the number of the convex portions is greater on the inclined portion closer to the helical axis than on the inclined portion farther away from the helical axis, and the protruded portion is The triangular apex is formed toward the outer periphery, and the angle of the inclined part farther from the helical axis is made slightly larger than that of the inclined part close to the helical axis, thereby improving grain sorting accuracy and grain lifting performance. .
The mechanism of its action is not necessarily clear, but it is believed that it affects the sorting accuracy.The grains that strongly slide down the slope (surface) due to the lateral pressure of the convex part turn over at the step, and This is thought to be due to the strong lateral pressure of the convex portion, which causes the material to be pushed out horizontally and slide down the slope (surface) of the lower stage, while being subjected to the lateral pressure of the convex portion and pressed against the sorting net for sorting. In addition, the reason why the grain-lifting ability is improved is that, as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 59-145078, when only the slope (surface) is used, many grains fall directly downward from the tips of the blades. Although the amount does not increase, as in the present invention, if it slides on the slope, receives strong lateral pressure at the step, is pushed out horizontally, and is further adjusted on the slope and pushed out, the effect of the falling force is directly affected. It is thought that the amount of fried grains increases because the grains are not exposed to the grains. And, due to the multiple spiral structure, a single spiral blade can scrape up multiple times more efficiently.

[Example] Hereinafter, an example of the present invention will be described 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 lifting spiral body of the present invention shown in the drawings is constructed by providing a main spiral blade 32a and an auxiliary spiral blade 32b on the outer periphery of a cylindrical spiral shaft 31.

The main helical blade 32a has a basic configuration in which each action area of a take-out area 35, a sorting area 34, a supply area 33, and a scraping area 36 are continuously provided from the upper part of the helical shaft 31 by one helical blade. is the same as the spiral blade of the conventional grain frying spiral body.

Further, auxiliary spiral blades 32b are provided in the valleys of the main spiral blades 32a.

In this embodiment, the auxiliary spiral blade 32b is
Similar to the main helical blade 32a, it is provided in the middle part of the valley of the main helical blade 32a in all the working areas from the upper part of the helical shaft 31 to the take-out area 35, the sorter 34, the supply area 33, and the scraping area 36. There is. As a result, the main spiral blade 32a and the auxiliary spiral blade 32a have a double helical structure.

In this way, by creating a double helix structure,
Since the spiral blades have two starting ends, grain can be raked up at two locations.

The angular position of the starting end of the auxiliary spiral blade 32b is set so that the phase is shifted by 180 degrees with respect to the starting end of the main spiral blade 32a, as shown unfolded in FIG. That is, the starting end of the main spiral blade 32a is 180
The starting end of the auxiliary spiral blade 32b is set at the 0 degree position.

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

In addition, the main spiral blade 32a and the auxiliary spiral blade 32b
Conventionally, a scraping claw was provided at the starting end of the spiral blade, but in the present invention, the scraping action is performed by using the tip (starting end) of the spiral blade as it is without providing a scraping claw. It's summery.

Furthermore, a main spiral blade 32a and an auxiliary spiral blade 32b
The inclined part 321 and the step part 3 extend outward from the helical shaft 31 in the radial direction over the entire area except for the scraping area (approximately 1/4 circumferential area from the starting end).
23 and an inclined portion 322 are provided.

The main spiral blade 32a and the auxiliary spiral blade 32a
As shown in the drawing, a convex portion 320a is provided on the upper surface of both inclined portions 321 and 322 over the entire area. In this embodiment, as shown in FIG. 4A, the convex portion 320a is formed by pressing the metal plate forming the main spiral blade 32a from the lower surface side and protruding triangularly from the upper surface side. The size of this triangular system is an equilateral triangle inscribed in a circle with a diameter of 14 mm.

In this embodiment, the convex portion 320a is the main spiral blade 3
2a and auxiliary spiral blade 32b, 3 spiral shafts per blade
Twelve pieces are arranged in the inclined part 321 near the spiral axis 31, that is, one piece is arranged at every 30 degrees, and six pieces are arranged in the inclined part 322 farther from the helical axis 31, that is, one piece is arranged at every 60 degrees. In this embodiment, the arrangement position is located slightly inside from the outer periphery. The size D and the protrusion height Y are appropriately set through experiments, but in the case of this example, the size D is an equilateral triangle inscribed in a circle with a diameter of 14 mm, and the height is 3 mm.

<Effects of Examples> 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 grains using the grain frying spiral of the above embodiment installed in the grain sorting machine shown in FIG.
Meanwhile, the motor M is rotated to rotate the drive shaft 6 and rotary disk 11 via the gearbox G. Here, the drive shaft 6 and the rotary disk 11
is rotated so that it rotates forward and backward. This turntable 11
Due to the rotation, the grain lifting spiral 3 rotates around the drive shaft 6, and due to the rotation of the drive shaft 6,
The sorting net 2 rotates. In this embodiment, the rotation of the grain frying spiral 3 is approximately 335 rpm in a clockwise direction.
-400 rpm, and the rotation of the sorting net 2 was counterclockwise, and good test results were obtained at about 78 rpm to 95 rpm.

Due to the rotation of the grain lifting spiral body 3, in the raising area 36,
The tip of the main spiral blade 32a and the auxiliary spiral blade 32
The grains fed into the grain receiving cylinder 5 are scraped up by the tip of the grain receiving cylinder 5. Moreover, since the spiral is double-layered, it will scoop up nearly twice the amount of grain than normal.

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

In the sorting area 34, the grains hit the mesh tube 22 due to the action of centrifugal force, and fine grains smaller than the mesh 22a are
It is sieved to the outside of the screen tube 22 and falls onto the horizontal partition plate 12, transferred to the discharge port 42 by the scraper blades 13, and discharged to the outside.

At this time, the main spiral blade 32a and the auxiliary spiral blade 3
Slope portion 321, step portion 323, and slope portion 322 of 2b
And by the convex parts 320 provided on both inclined parts 321 and 322, the grains are subjected to various actions such as inversion and stirring, and are pressed against the mesh body 2, and the fine grains are transferred to the mesh 22.
It becomes easier 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 and fed and conveyed to the removal area 35.

The grains fried to the top of the take-out area 35 are discharged from the discharge port 23a into the storage section of the hopper 8,
stored.

As described above, the grain sorting machine having the grain lifting spiral of the present invention has high grain lifting performance and sorting accuracy.

[Effects of the invention] As explained above, the present invention provides a grain lifting helical body that uses the main helical blade to transport grain upward from the raking area at the lowest end through the sorting area to the take-out area by rotating the helical shaft. A configuration in which an auxiliary spiral blade whose starting end is at a different angular position from the starting end of the main spiral blade is provided to form a multiple spiral structure over the entire area, and substantially the entire area of the main spiral blade and the auxiliary spiral blade is formed into sloped parts and stepped parts. The structure has an inclined portion and a convex portion is provided on both the inclined portions of the main spiral blade and the auxiliary spiral blade, which has the effect of improving sorting accuracy and grain lifting performance. It also has the effect of minimizing the amount of residual rice remaining in the supply area.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the grain lifting spiral of the present invention, Figure 1A is a perspective view thereof, Figure 1B is a perspective view of the raking area, and Figure 2 is the shape of the main spiral blade. and a partially enlarged view showing the convex portion, FIG. 3A is a plan view thereof,
Figure B is an enlarged plan view of the convex portion, Figure 4A is a partially enlarged cross-sectional view of the main spiral blade, Figure 4B is an enlarged cross-sectional view of the convex portion, and Figure 5 is the double helix state of the grain frying spiral. FIG. 6 is a cross-sectional view showing a grain sorting machine equipped with a conventional grain lifting spiral. 2... Sorting net body, 3... Grain frying spiral body, 31...
Spiral shaft, 32a... Main spiral blade, 32a... Auxiliary spiral blade, 321... Inclined part, 322... Step part,
322... Inclined part, 320a... Convex part, 33...
Supply area, 34... Sorting area, 35... Removal area, 36
... Raising area, 4... Outer shell body, 5... Grain receiving tube.

Claims (1)

[Claims for Utility Model Registration] A grain sorting machine comprising a main helical blade on the outer periphery of a helical shaft, which is fitted concentrically and rotatably inside a cylindrical sorting net, and constitutes the main part of a grain sorting machine. , in a grain lifting spiral body in which grains are conveyed upwardly by a main spiral blade from a raking area at the lowest end to a sorting area to a take-out area by rotation of a helical shaft, a grain-lifting spiral body exists almost over the entire area of the grain lifting spiral body. The spiral blade is composed of an inclined part, a stepped part, and an inclined part extending outward from the helical axis, and triangular protrusions are provided on both the inclined parts, and the number of the protrusions is equal to the number of the helical axis. The number of inclined parts closer to the helical axis is greater than the number of inclined parts far from the helical axis, and the convex part is formed with a triangular apex facing the outer periphery, and the inclined part is formed on the inclined part farthest from the helical axis. The angle is made slightly larger than the inclined part near the helical axis, and an auxiliary spiral blade is provided whose starting end is at a different angular position from the starting end of the main spiral blade, so that a multiple spiral structure is formed over the entire area of the grain-lifting spiral, and A grain frying spiral body for a grain grain sorting machine, characterized in that the auxiliary spiral blade is also composed of the above-mentioned inclined portion, stepped portion, and inclined portion.