JPH0322230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscillating rice sorter.

A rice sorting machine is known in which rice is sorted by swinging a swinging sorting board having a large number of small protrusions on its surface along a circular trajectory. In order to maintain good sorting conditions, the inclination angle and rotation speed of such rice sorting machines are adjusted so that the flow of grains is relatively gentle. It took a long time to remove residual grains. In order to save this time, if the operation is stopped before the residual grains have been completely removed, the paddy, etc. remaining on the board will be discharged from the finished rice (brown rice) discharge port when the operation is restarted, and the There was a problem that it got mixed in. Methods for quickly discharging grains from the sorting board include increasing the rotation speed and increasing the height of the supply side relative to the discharge side. This is not preferable because it causes problems such as decreased durability and complicated structure.

In view of the above-mentioned circumstances, the present invention provides a rice sorter that can quickly discharge residual grains at the end of work. That is, the rice sorting machine according to the present invention includes a rotary swinging sorting board that swings on a circular orbit and has a large number of protrusions on its surface with pushing surfaces that come into contact with grains and push them in a certain direction. This paddy sorting machine is characterized by being provided with a forward/reverse switching means that can freely reverse the direction of rotation of the swing sorting board.
Embodiments of the present invention shown in the drawings will be described below.

1, 2 and 3 are schematic diagrams showing an example in which the rice sorter 1 according to the present invention is used in combination with a huller 2 and a grain sorter 3, and FIGS. 4a, b , c are enlarged views of important parts.

This rice sorter 1 includes a supply port 4, a sorting section 5, and a socket section 6. The sorting section 5 includes six swinging sorting boards 7, 7, . . . stacked one on top of the other, and these swinging sorting boards 7, 7, . . Sorting section 5
On the opposite side to the supply side, there are three drop ports facing the receiving port 6, namely, a paddy drop port 8, a mixed rice drop port 9, and a finished rice drop port 10. The paddy, mixed rice, and finished rice sorted by step 7 fall from these drop ports into the paddy receiver 11, mixed rice receiver 12, and finished rice receiver 13, which are provided directly below the drop ports. do. In the figure, 14,1
4' is a partition plate.

The mixed rice socket 12 and the finished rice socket 13 are separated by the partition plate 1.
5, and this partition plate 15 is provided with a through hole 16 which communicates both the sockets 12 and 13. Further, the finished rice receptacle 13 is provided with a bottom plate 17, and this bottom plate 17 is provided with an opening 18. A cover 19 is provided on the passage 16 arrangement portion and is rotatable in the direction of arrow A in the figure, so that the passage 16 or the opening 18 can be selectively closed by a lid driving means. ing. At the lower end of the socket part 6, there is a paddy discharge port 21, a mixed rice discharge port 22, and a finished rice discharge port 23, which communicate with the paddy socket 11, mixed rice socket 12, and finished rice socket 13, respectively.
is provided.

Hulling machine 2 installed below this paddy sorting machine 1
is equipped with dehulling rolls 24 and 24', and dehulls the paddy newly supplied from the paddy supply port 25 and the paddy discharged from the paddy discharge port 21. A door 26 is provided above the dehulling rolls 24, 24', so that the supply of paddy to the dehulling rolls can be stopped. A ventilation chamber 27 is provided below the threshing rolls 24, 24', and is configured to discharge the paddy grains after threshing to the outside through a paddy grain duct 28. The mixed rice after dehulling is transferred to Screw Conveyor 2.
9 and 29' to the receiving port 31 of the grain lifting machine 30, and is carried up into the mixing rice tank 32 by the grain lifting machine 30. The mixed rice discharge port 22 is connected to the receiving port 31 of the grain lifting machine 30 through a reflux path 33, and this reflux path 33 and the grain lifting machine 30 form a circulation path for the mixed rice. .

A finished rice discharge port 23 of the paddy sorter 1 is connected to a grain sorter 3 equipped with a rotating screen 34. The finished rice separated from the paddy by the paddy sorter 1 is removed from grain particles such as small rice by the grain sorter 3, and taken out from the outlet 35.

Next, the swinging sorting boards 7, 7, of this paddy sorting machine 1,
As shown in FIG. 4, the rice crackers are somewhat inclined laterally (angle of inclination θ) so that the finished rice (brown rice) drop port 10 side is higher and the paddy drop port 8 side is lower. Regarding the relationship between the supply port 4 side (supply side) and the drop port side (discharge side), the supply side may be raised somewhat higher, but it may also be horizontal, and in some cases, the supply side may be placed on the discharge side. It can also be kept somewhat lower. The higher the supply side, the faster the grain will flow. As shown in FIG. 4a, the supply port 4 is provided near the left end of the swing sorting board 7 when viewed from above (the position facing the paddy drop port 8), and the inside thereof is provided with partitions 4a, 4a, ... are divided into 6 supply paths a, b, ..., f, and each supply path is divided into 6 supply paths a, b, ..., f.
It communicates with the oscillating sorting boards 7, 7, . . . , respectively. The mixed rice (mixture of paddy and brown rice) input from the mixed rice tank 32 into the supply port 4 is distributed and supplied to the respective swinging sorting boards 7, 7, . Sorting work is carried out.

On the top surface of the oscillating sorting board 7, there are many small protrusions 71.
is formed. The small protrusion 71 has a pushing surface 72 that comes into contact with the grain and pushes it in one direction, and the other part is formed as a smooth curve. In the illustrated example, the small protrusion 71 is formed so that the pushing surface 72 faces to the right when viewed from the discharge side. Fourth
FIG. b is a vertical cross-sectional view of the small protrusion 72.

The oscillating sorting boards 7, 7, . . . are rotated eccentrically through a crank 43 by rotational power transmitted from a power motor (not shown) through a belt 40 and a pulley 41, and rotate on a circular orbit. oscillate.
In Fig. 4a, in which the pushing surface 72 of the small protrusion 71 faces to the right when viewed from the discharge side, during sorting, the swinging sorting plates 7, 7, . . . (counterclockwise). As a result, brown rice (finished rice) with a high specific gravity is pushed to the right in Figure 4a, while paddy with a low specific gravity is gathered to the left and discharged from the respective drop ports. This is because as the mixed rice fed from the supply port onto the sorting board advances toward the discharge side (flowing direction), the brown rice with a relatively high specific gravity sinks to the bottom and is pushed into the fourth layer by the pushing surface of the small protrusions. This is thought to be because the paddy in the upper layer is pushed to the right in Figure a and collected to the left along the inclination θ of the sorting board. In this case, incompletely sorted mixed rice mixed with paddy and brown rice is discharged from the mixed rice dropping port 9 located in the middle part.

Next, in order to quickly discharge the materials to be sorted that remain on the sorting plates at the end of the work, etc., the rotating direction of the swinging sorting plates 7, 7, etc. should be rotated in the direction of the arrow Y in the figure (when viewed from above). clockwise) and then reverse this. In this way, when the oscillating sorting board is reversed,
Brown rice and paddy all tend to gather near the left side of Figure 4a, which is the lower side of the slope, and are quickly discharged. The reason for this is not necessarily clear, but since the sorting board rotates to the left during sorting, the pushing surface 72 of the small protrusion acts to push the grains to the right in Figure 4a, and On the other hand, when the sorting board is reversed, the grains that come into contact with the pressing surface 72 are directed downward (in the downward direction, more specifically, in the lower right direction). It is thought that rapid evacuation is performed to provide a component of force. If the supply of grains to the sorting board is interrupted during forward rotation, the grains remaining in the upper right part of Figure 4a will not be discharged, but if the sorting board is reversed, such grains can be removed. The grains are also quickly expelled.

As means for switching forward/reverse rotation of the sorting board, there is a method in which a forward/reverse switching circuit is provided in the operation circuit of the power motor, and a changeover switch is used to switch the rotation direction of the motor. Although such forward/reverse switching means generally does not require a particularly complicated structure, the above method results in an extremely simple structure.

As explained above, the rice sorting machine according to the present invention is equipped with a forward/reverse switching means that can freely switch the rotation direction of the rotating swing sorting board in either the forward or reverse direction, so it is effective. In addition to being able to carry out thorough sorting work, it has also become possible to quickly discharge the grains on the sorting board when necessary, such as at the end of work.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are a partially sectional front view, a partially sectional side view, and a plan view, respectively, showing the outline of a rice sorter according to the present invention. Figures 4a, b, and c are enlarged views of the main parts; a is a plan view;
b is a vertical sectional view of the small protrusion, and c is a front view. 1...Paddy sorting machine, 2...Paddy hulling machine, 3...Grain sorting machine, 4...Feeding port, 7...Swing sorting board, 8...Paddy dropping port, 9...Mixed rice dropping port, 10... Finished rice falling port, 71... Small protrusion, 72... Oshiyose surface.

Claims (1)

[Claims] 1. A rice sorting machine equipped with a rotary swinging sorting board that swings on a circular orbit and has a large number of protrusions on its surface with pushing surfaces that come into contact with grains and push them in a certain direction, which A rice sorting machine characterized by being provided with a forward/reverse switching means that can freely reverse the direction of rotation of a swinging sorting board.