JPS6256794B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method for sorting grains such as rice and wheat into large grains and small waste grains, and packing only the grains into bags. Concerning a convenient selection device.

[Prior art] In order to sort grains such as rice into large grains and grains other than grains (hereinafter referred to as waste grains) and pack only the grains into bags, the conventional method is shown in Figure 1. This was done using a similar device. In the figure, A is a horizontal sorter, B is a horizontal sorter,
is a granulation machine, and C is a weighing platform. The grains to be sorted are first fed through the feed port _A1 of the horizontal sorter A,
It is fed into a sorting network A ₂ which is connected to A ₄ and rotates. The sorting net _A2 has a cylindrical or polygonal shape,
A large number of meshes are perforated on its circumferential surface through which debris particles can pass. While the grains move toward the take-out port A ₃ as the sorting net A ₂ rotates, waste grains pass through the mesh, are sieved, and are discharged to the outside of the sorter A from the discharge port A ₅ . . On the other hand, the sized particles reach the end of the sorter A and are supplied to the intake port _B1 of the granulator B from the outlet _A3 . The sized grains transferred to the granulator B are conveyed
It is lifted upward by _B2 and taken out from the outlet _B3 . A weighing stand C is placed below the take-out port _B3 , and a bag _C1 is placed on it, so that the taken out sized grains are stuffed into the bag _C1 .

[Problem that the invention seeks to solve]

As can be seen from the above, in order to sort grains, sort grains, and pack them into bags according to the conventional method, a horizontally long sorting machine A and a grain lifting machine B are required, so a narrow work space is required. It is not suitable for installation in
Furthermore, when the horizontal sorting machine A is considered individually, it has the drawback that its sorting efficiency is extremely poor. Sorting net is the central part of horizontal sorting machine A
A ₂ is cylindrical and has a polygonal cross section as shown in FIG. 2, for example. When the sorting net A ₂ is rotated in the direction of the arrow, most of the grains fed therein will form a lumpy sedimentary layer a in the area where the rotating centrifugal force of the sorting net A ₂ and the gravity acting on the grains are balanced.
, and the grains in the inner part where the peripheral speed is slow fall down as a thin layer along the surface of the deposited layer a. In this case, the grains forming the sedimentary layer a are hardly subjected to the sieving action, and only the grains that have fallen down are subjected to the sieving action. As a result, sorting net A ₂
The sorting work is carried out only in area b located at the bottom of the screen, and the part corresponding to this effective area b is
Since it is only about 1/8 of the total circumferential area of A ₂ ,
At present, the actual sorting efficiency remains at just over 10%.

[Purpose of the invention]

The purpose of the present invention is to solve and eliminate the above-mentioned problems.It independently combines the functions of a conventional granulation machine and a sorting machine, and achieves markedly superior sorting efficiency and reduces the area required for installation. It is an object of the present invention to provide a sorting device for bagging that can be reduced in size as much as possible and has extremely good workability such as supplying grains and packing grains into bags.

[Means for solving problems]

The present invention is characterized by a cylindrical sorting tube with a number of sorting holes on its circumference having a mesh that allows only small-diameter waste grains to leak out of the supplied grains, and a cylindrical sorting tube with concentric and A conveyor for fried grains, which is rotatably driven and has a spiral rib on the outer peripheral surface, is housed and erected in a vertically elongated shell, and a grain supply port is provided in the lower part of the shell. An introduction part is formed in the lower part of the sorting tube to communicate the supply port of the body with the inside of the sorting tube, and the grains are fried sequentially from the bottom to the top inside the sorting tube with the conveyor while waste grains are removed. A discharge part for discharging the sorted particles obtained by leaking and removing from the sorting hole to the outside of the sorting tube is provided at the top of the sorting tube, and a storage tank for storing the discharged sorted particles is connected to the discharge section of the sorting tube. A shutter is provided integrally on one side of the upper part of the shell body, and a shutter for switching between storing and discharging the sized particles is provided at the outlet formed below the storage tank.

[Effect]

When grains to be sorted are introduced through the supply port of the shell, the grains are introduced into the sorting tube through the introduction section. Rotating a conveyor that has spiral ribs on its outer circumferential surface (those with right-handed ribs are rotated clockwise in plan view, and those with left-handed screws are rotated counterclockwise). , the grains in the sorting tube are conveyed upward along the upper surface of the ribs. At the same time, since they are pressed against the inner circumferential surface of the sorting tube by centrifugal force, while they move upward, the waste particles smaller than the size of the sorting holes leak out of the sorting tube and are removed. In this way, while the grains are fried sequentially from the bottom to the top inside the sorting cylinder, small waste grains are removed from the input grains, and only large grains are discharged from the upper discharge part to the outside of the sorting cylinder. . The released sized particles are guided into a storage tank and stored. By controlling storage and discharge of the sorted particles by operating a shutter provided at the outlet of the storage tank, bagging of predetermined amounts of the sorted particles is performed.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 3 is a longitudinal sectional view of the sorting device according to the present invention. As can be easily understood from the drawings, the most characteristic feature of the sorting device according to the present invention is that the central portion thereof includes a cylindrical sorting tube 20 and a concentric and rotatable upright position inside the sorting tube 20. conveyor 30
These central points are housed in the shell 1, and the storage tank 14 is located inside the shell 1.
It is attached to one side of the upper part and has a unified structure as a whole.

First, the shell 1 will be explained. The main body of the shell 1 is cylindrical, and inside thereof, a bottom plate 3, a lower partition plate 5, and an upper partition plate 7 are provided in order from the bottom. And the bottom part is the base cavity 2,
The upper part thereof is a supply area 4 divided by a bottom plate 3 and a lower partition plate 5, a lower partition plate 5 and an upper partition plate 7.
It is occupied by a sieving area 6 divided by a sieve area 6, and a take-out area 8 divided by an upper partition plate 7 and a canopy 9 placed over the top. A supply port 12 for grains M ₁ to be sorted is provided on one side of the waist portion of the shell body 1 and protrudes outward, and a discharge port 13 for waste grains M ₂ to be separated and removed is provided on the other side.

A storage tank 14 is integrally attached to one side of the upper part of the shell 1. The inside of the storage tank 14 and the inside of the shell 1 are communicated with each other. In addition, 1
Reference numeral 7 designates an outlet for the sized grain _M3 stored in the storage tank 14, 18 a shutter for opening and closing the outlet 17, and 19 a drive device for the shutter 18.

At the center of the bottom plate 3, there is a rotary plate 24 that supports the bottom of the sorting cylinder 20 and a lower shaft 33 of the conveyor 30.
A gearbox 10 is installed that receives both of the two and transmits rotational driving force to both.
A motor 11 is attached to the lower part of the motor. on the other hand,
A bearing 15 is provided in the center of the canopy 9 for pivotally supporting the upper shaft 32 of the carrier 30, thereby supporting the sorting cylinder 20 and the upper part of the carrier 30.

The lower partition plate 5 is fixed to the inner wall of the shell 1 by welding or the like so as to slope downward from the upper side of the supply port 12 to the lower edge of the discharge port 13. This prevents the waste particles M ₂ from falling into the supply area 4 during operation of the sorting device. Further, the upper partition plate 7 is fixed to the inner wall of the grain 1 at an angle by welding or the like, and is configured to guide the sized M ₃ to be discharged into the extraction area 8 from the upper part of the grain 1 into the storage tank 14. At the same time, it also prevents the sized _M3 from falling into the sieving area 6. The center portions of the upper partition plate 7 and the lower partition plate 5 are punched out in a hollow shape in order to fit the sorting tube 20 thereinto.

The shell 1 made as described above is most commonly formed to have a circular cross section, but of course, it may have a rectangular,
It may be a polygon such as a hexagon. A rubber brush 16 is attached to the inner wall of the sieving area 6 to lightly contact the outer peripheral surface of the sorting tube 20 to prevent clogging.

The main parts of the sorting cylinder 20 are a bottom cylinder 21 and a top cylinder 2.
5 and a sorting part 29 interposed and connected between the bottom cylinder 21 and the top cylinder 25, and has a cylindrical shape as a whole. Both the top cylinder 25 and the bottom cylinder 21 have a lid or a bottom, and are similar to a can-shaped body cut transversely at the center and divided into two parts, each of which is disposed at an upper part and a lower part. The bottom tube 21 is fitted into the hole in the lower partition plate 5, and the top tube 25 is fitted into the hole in the upper partition plate 7.
There is a slight gap 5 between the bottom cylinder 21 and the lower partition plate 5 and between the top cylinder 25 and the upper partition plate 7 to prevent the waste particles M ₂ from leaking into the supply area 4 and the extraction area 8. ', 7' are provided, respectively.

An introduction portion leading to the interior is formed below the side surface of the bottom cylinder 21 . The introduction part includes a grain receiving part 22 which is expanded upward in a funnel shape from the outer circumferential surface of the part near the bottom, and a plurality of introduction parts which are opened on the side surface along the inner lower edge of the grain receiving part 22. It consists of a mouth 23. The tip of the supply port 12 faces the grain receiving portion 22, and the grains _M1 supplied to be sorted are introduced into the bottom cylinder 21 from the introduction port 23. Note that the bottom cylinder 2
1 is supported by a rotary disk 24 below.

A plurality of discharge portions for discharging the sorted grain M ₃ are provided on the side circumferential surface of the top cylinder 25 in a portion close to the top plate 26, that is, in a position above the upper partition plate 7. . A bearing 2 is installed in the center of the top plate 26.
8 is provided, and the upper shaft 32 of the carrier 30 is pivotally passed through the bearing 28.

The sorting part 29 is a cylindrical body interposed between the bottom cylinder 21 and the top cylinder 25 to connect them, and faces the sieving area 6. The circumferential surface is provided with circumferential uneven folds over almost the entire length in the axial direction. These pleats may be formed into multiple threads or even into a spiral shape. In addition, when attaching it in a spiral shape, the rib 3 of the conveying body 30 described later
It is also good to have an inclination that matches the spiral lead angle of 4. Furthermore, the sorting section 29 is reinforced by providing the pleats.

A large number of sorting cylindrical holes (not shown) are bored in the circumferential surface of the sorting part 29. The size of the sorting hole is such that small waste grains M ₂ can pass therethrough, but large grains M ₃ cannot pass therethrough. Furthermore, if the sorting holes are provided in the outwardly projecting portions of the uneven folds, the waste particles M ₂ can easily leak out into the sieving area 6. The shape of the screening hole is usually a horizontally long ellipse that approximates the shape of the grain.
As long as it is possible to sieve the sized grains M ₃ and waste grains M ₂ , it does not matter what shape they have.

The carrier 30 is housed concentrically inside the sorting tube 20. The main body of the carrier 30 is a hollow shaft 3
1, and a spiral rib 34 is threaded onto its outer peripheral surface over the entire length in the axial direction. An upper mandrel 32 and a lower mandrel 33 are vertically disposed at the centers of the upper and lower end surfaces of the hollow shaft 31, respectively.
The upper mandrel 32 passes through the bearing 28 of the top tube 25 and is pivotally supported by the bearing 15 provided on the canopy 9 of the shell 1. The lower mandrel 33 passes through the center of the bottom of the bottom tube 21 and is connected to the motor via the gearbox 10. 11 rotation shaft. Further, a gap is provided between the peripheral edge of the rib 34 and the sorting cylinder 20 to the extent that grains do not leak.

The lead angle of the ribs 34 is preferably set in a range of about 10 to 25 degrees. The grains M ₁ are carried upward by the rotation of the carrier 30, but if the lead angle of the ribs 34 is steep, high-speed rotation is required. On the other hand, if the lead angle is gentle, it can be easily conveyed upward even by slow rotation, but it takes a long time to reach the top. Furthermore, during slow rotation, the centrifugal force acting on the grains _M1 is weak, resulting in a decrease in sieving efficiency. Therefore,
The lead angle of the ribs 34 must be determined in relation to the rotational speed of the conveyor 30 and the sieving efficiency.

In this embodiment, the sorting tube 20 and the conveyor 30
are rotated concentrically and in mutually opposite directions by a rotation mechanism housed within the gearbox 10. The conveying body 30 rotates as rotational force is directly transmitted from the motor 11 that is pivotally attached to the lower shaft 33 of the conveying body 30 . On the other hand, the sorting tube 20 has a planetary gear ( (not shown) are simultaneously engaged with each other to indirectly transmit the rotational force of the motor 11, thereby rotating in the opposite direction to the conveying body 30. Further, it is preferable that the rotational speed ratio between the sorting tube 20 and the conveying body 30 is about 1:2.5. In this embodiment, the rotation speed of the sorting cylinder 20 is 80 rpm, and the rotation speed of the conveyor 30 is 200 rpm.
And so. It goes without saying that the rotation of both may depend on separate drive sources.

The sorting tube 20 and the conveyor 30 exhibit the following effects due to the above-mentioned mutually reverse rotation and slow speed relationship. FIG. 4 is a plan view of the sorting cylinder 20 and the carrier 30, cut transversely at approximately the center of the body. The hollow shaft 31 and the rib 34 rotate at high speed in the direction of the solid line arrow, and the sorting section 29 of the sorting tube 20 rotates at low speed in the direction of the dotted line arrow. The grains M ₁ placed on the ribs 34 are urged upward in the direction of the dashed-dotted arrow, and at the same time are pressed against the inner peripheral surface of the sorting section 29 by centrifugal force. Among the grains M ₁ , waste grains M ₂ that are smaller than the sorting hole 29 ′ leak out from the sorting hole 29 ′ due to centrifugal force and are discharged to the sieving area 6 . Since the sorting section 29 rotates at a low speed, leakage of the waste particles _M2 is not blocked. Further, by rotating the sorting unit 29 in the same direction as the rising direction of the grain M ₁ , the grain M ₁
It is possible to apply a tensile force through contact with the sorting part 29 to assist the upward movement in the direction of the dashed-dotted line.
Note that if the rotational speed of the conveyor 30 is sufficient, the grains _M1 can be sorted and transported upward without rotating the sorting cylinder 20.

In this way, in the present invention, the sieving action on the grains _M1 is carried out all around the sieving section 29, and as a result, excellent sieving efficiency can be obtained.
If this is compared with the conventional sorting network _A2 shown in FIG. 2, it can be seen that the sorting efficiency is several times higher.

Next, the implementation status of the sorting work will be explained.
When the grains M ₁ to be sorted are fed into the supply port 12 of the shell 1, the grains M ₁ pass through the introduction section consisting of the grain receiving section 2 and the introduction port 23, and some of them reach the bottom of the bottom cylinder 21. , some rest on the lower rib 34. When the sorting tube 20 and the conveyor 30 are rotated in opposite directions,
Due to the mutual stimulant action of both grains, grain _M1 becomes rib 3.
It is transported upward along the spiral plane of 4. When the grains M ₁ cross the upper edge of the bottom cylinder 21 and reach the sorting section 29, the large grains M ₃ are carried as they are to the top cylinder 25, but the mixed small waste grains M ₂ are sorted by centrifugal force. It is sieved through the holes into the sieve area 6. The sieved waste grains _M2 fall onto the lower partition plate 5, move downward along the inclined surface thereof, and are discharged from the shell body 1 through the discharge port 13. By the way, some of the grains _M1 have grain sizes that are very close to the size of the sorting hole, and these may block the sorting hole and cause a clogging state. In such a state, the function as a sorter cannot be fully demonstrated, so in order to prevent clogging, the inner surface of the shell 1 is
A rubber brush 16 is installed vertically. The grain _M1 blocking the sorting hole touches the brush 16,
Some are pushed back into the sorting section 29, some are pulled down, and the outer surface of the sorting section 29 is constantly swept and kept free of clogging. In this way, out of the grains _M1 , waste grains _M2 are removed from the sorting section 2.
All of it leaks out and is removed by the time it reaches the upper edge of 9.
Only the sized particles _M3 are sorted and reach the top cylinder 25. The sized particles M ₃ are discharged from the discharge part 27 of the top cylinder 25 to the take-out area 8, and those that fall onto the upper partition plate 7 fall along the slope and are guided into the storage tank 14. The particles are directly put into the storage tank 14, and all of the sized _M3 is temporarily stored in the storage tank 14. A weighing platform is installed below the outlet 17 of the storage tank 14, as in the conventional weighing platform, and a packaging bag is placed on the weighing platform. The procedure for filling the bag is to first fully open the shutter 18 and sort the particles into the bag.
M ₃ is fed in, and when the grain size approaches a predetermined amount, the shutter 18 is tightened to reduce the opening area of the outlet 17, and when the predetermined amount is reached, the shutter 18 is
be completely closed. Although a series of these operations can be performed manually, a control device includes a weight detector attached to the weighing platform and automatically controls a drive signal to the shutter drive device 19 based on a detection signal from the weight detector. It is also possible to perform this by providing

〔Effect of the invention〕

As described above, the sorting device according to the present invention has the following effects.

Since a single sorting device performs both sorting and grain lifting operations, a grain lifting machine, which was conventionally required to simplify bagging operations, becomes unnecessary.

Since the grain sorting action is carried out on the entire circumference of the sorting cylinder, a far superior sorting efficiency can be obtained than in the past. Whereas with conventional sorting machines, only about 1/8 of the sortable area was used.
In the present invention, almost all of the effective area is utilized.

Since the sorting cylinder and the conveyor are housed in a vertically elongated shell, the machine has the functions of both a sorter and a granulator, and the area required for installation is extremely small. Therefore, it is possible to significantly save work space.

By providing the storage tank shell integrally with the shutter and attaching the shutter to the outlet, it is possible to temporarily store all of the obtained sized particles and then discharge them in predetermined amounts. Therefore, quantitative bagging work becomes very easy.

Since the supply port is provided at the bottom of the shell,
The operation of supplying grains to be sorted is easy.

By forming the outlet for sorting particles at the bottom of the storage tank provided on one side of the upper part of the shell, the outlet is located at a convenient height for introducing into packaging bags, etc., improving work efficiency. is very good.

In short, the sorting device according to the present invention independently has the functions of a conventional sorting machine and a granulation machine, and therefore greatly improves work efficiency, saves work space, and simplifies device maintenance. There are too many effects to enumerate.

[Brief explanation of the drawing]

Figure 1 is a front view showing a state in which a conventional horizontal sorter, a granulator, and a weighing stand are installed together; Figure 2 is a cross-sectional view of a sorting net showing the sorting action of a conventional horizontal sorter; Figures 3 and 3; FIG. 4 is a diagram according to the present invention, in which FIG. 3 is a longitudinal cross-sectional view of the entire sorting device, and FIG. . M ₁ ... grain, M ₂ ... waste grain, M ₃ ... regular grain, 1 ... shell,
12... Supply port, 14... Storage tank, 17... Outlet port, 18... Shutter, 20... Sorting tube, 22... Grain receiving section, 23... Inlet port, 24... Discharging section, 29'... Sorting hole, 30... Conveying body , 34...rib.

Claims (1)

[Claims] 1. A cylindrical sorting tube with a number of sorting holes on its circumferential surface having a mesh size that allows only small-diameter waste grains to leak out of the supplied grains, and a concentrically rotatable interior inside the sorting tube. A conveyor for fried grains having spiral ribs on the outer circumferential surface is housed in a vertically elongated shell, and a grain supply port is provided in the lower part of the shell. An introduction part that communicates with the inside of the sorting tube is formed at the bottom of the sorting tube, and while the grains are fried sequentially from the bottom to the top inside the sorting tube with the conveyor, waste grains leak out from the sorting hole and are removed. A discharge part for discharging the sized particles obtained by the above-mentioned granulation to the outside of the sorting cylinder is provided at the top of the sorting cylinder, and a storage tank for storing the released sized particles is connected to the discharge part of the sorting cylinder, and the discharge part is connected to the upper part of the shell body. A sorting device for bagging grains, characterized in that it is integrally provided on one side of the storage tank, and a shutter for switching between storage and discharge of sorted grains is provided at an outlet formed at the bottom of the storage tank.