JPH01207179A - Grain screening machine - Google Patents

Abstract

PURPOSE:To simplify the constitution over the entire part of a screening machine and to reduce the cost thereof by providing a middle partition plate which circulates a rice mixture composed of hulled rice and hull on the plate surface onto the plate surface of a screening plate for separating and screening the rice mixture to the hulled rice and the hull. CONSTITUTION:The screening plates 29 which separate and screen the rice mixture to the hulled rice and the hull are provided horizontally at 0 deg. angle of inclination in the transverse direction. A grain feed port 52 from a feed hopper 2 of the oscillation screening machine is provided to the longitudinally inclined uppermost end at the rear end of each screening plate 29 and a hulled rice discharge port 53 is provided to the longitudinally inclined uppermost end side at the rear end of each screening plate 29; further, a hull discharge port 54 is disposed to the longitudinally inclined lowermost end side at the front end of each screening plate 29; in addition, the middle partition plate 55 which circulates the rice mixture composed of the hulled rice and the hull on the surface of the screening plate 29 along the transverse and longitudinal directions is provided near the longitudinally inclined bottom end on the plate surface of each screening plate 29. As a result, the high-accuracy sepn. and screening of the hulled rice and the hull are enabled and, therefore, the constitution over the entire part is simplified and the cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a grain sorting machine that separates mixed rice that has been de-4-treated using a huller into brown rice and paddy.

``Prior art'' For example, in the method described in Japanese Utility Model Publication No. 10285/1985, there is a means in which a grain guide plate is provided on the grain selection surface of a sorting board that separates and sorts paddy, mixed grains, and brown rice. be.

``Problem to be solved by the invention'' However, in the case of this type of conventional means, it is necessary to return the separated mixed grains to the grain supply side of the sorting board via an elevator, etc., which requires a large amount of construction. The disadvantage was that it was expensive.

There is also a type with a two-sort sorting structure that separates only brown rice and paddy without taking out the mixed grain separately, but this structure requires a wide sorting board surface and more advanced control technology, making it impractical. Therefore, the present invention provides a method for solving the problem of unsuitability for brown rice and paddy. It is equipped with a partition plate for circulation.

"Function" According to the present invention, there is no need for the complicated process of once taking out the mixed rice from the sorting machine and returning it to the grain supply side of the sorting machine, and the mixed rice can be circulated on the plate surface. It is possible to separate and sort only brown rice and paddy with high precision using an extremely simple method. Therefore, the overall configuration of this sorting machine is simplified and costs are reduced, making it economical and highly efficient and practical. It is suitable for

``Example'' An example of the present invention will be described in detail below based on the drawings. 1st
The figure is an explanatory plan view of the oscillating sorter, and Figure 2 is an overall explanatory diagram of the oscillating sorter and the huller. Hopper (2) supply port
a shutter (3) that opens and closes the hopper (2); a pair of de-wall rolls (4) and (5) disposed below the supply port of the hopper (2);
A falling guide shoe (8) (7) that guides the dropped rice from the de-wall rolls (4) and (5), and the chute (8)
) (7) A variable flow grain plate (8) that separates the rice falling from the machine into brown rice and paddy, and a brown rice that takes out the brown rice separated by the flow grain plate (8) out of the machine through a brown rice guide chute (9). A reduction shoe (1
2), a rice discharging auger (13) disposed below the lower mouth of the rice layer (11), and a suction duct for rice husks in the sorting air passage (11) in the upper area of each chute (θ) (12) (15) and exhaust duct) (1B) to discharge the dust to the outside of the machine; (14) and an intake air intake port (19) for introducing air into the interior of the brown rice discharge auger (10), which removes brown rice from among the rice that has been dehulled by the dehulling rolls (4) and (5). The brown rice is then taken out and transferred to a supply hopper (22) of a swing sorter (21) via a discharge path (20) such as an elevator.

In addition, a wind force sensing valve (23) is provided on the intake front side of the air intake port (19) to sense the sorting wind power. When the sorting air force in the sorting air passage (14) decreases due to an increase in intake and exhaust resistance in the duct (15) (1B), a balance weight integrally connected to the valve shaft (20) of the sensing valve (23) The sensing valve (23) is tilted in the direction of the arrow in Fig. 2a by its own gravity (25), and the decrease in the wind force is detected by the potentiometer-type selective wind sensor (2B) connected to the valve shaft (24). At the same time, the fan speed regulating motor (27) for increasing and decelerating the rotation of the dust suction/exhaust fan (17) is controlled based on the detection of the wind force sensor (2B), so that the sorting wind power is always kept constant. .

As shown in FIGS. 3 to 5, the oscillating sorter (21)
, the swinging sorting plates (29) are provided in multiple stages on the swinging frame (28) which is tilted left and right, and the main machine frame (30
) is provided to support the frame (28) via a swinging mechanism (31) and to swing each sorting plate (29) left and right in the direction of inclination thereof.

That is, the swing mechanism (31) fixes the inclined lower end side of the frame (28) to the support shaft (32) of the machine frame (30) with the mounting plate (3).
3) and a right swing arm (35) that is swingably supported via a swing fulcrum shaft (34), and a swing fulcrum shaft (3B) of the machine frame (30) that supports the tilted upper end of the frame (28). ), the left swinging arm (37) is swingably supported on the support shaft (32), and the plate surface inclination angle adjustment whose base end is fixed to the support shaft (32) and the engagement member (38) at the tip is attached to the machine frame (30). Motor (3θ) motor screw shaft (40
) and the inclination angle adjusting plate (41) to be connected to the Ja frame (30
) with the base end supported on the support shaft (42), and the swing drive shaft (42) at the tip.
3) and the intermediate engagement member (44) is attached to the machine frame (30).
The motor screw shaft (
4B), a swing angle adjustment plate (47) coupled to the swing drive shaft (4B), a swing drive motor (49) interlocked to the swing drive shaft (43) via a belt transmission element (48), and a swing angle adjustment plate (47) coupled to the swing drive shaft (4B); 4
3) is equipped with a crank plate (51) that interlocks and connects the middle of the left swing arm (37) via an eccentric wheel body (50), and when the crank plate (51) is cranked by the motor (43), each axis ( 34) Each sorting plate (29) centered on (3B)
At the same time, the shaft (3) is rotated by the motor (38).
When adjusting the 0 position, the horizontal inclination angle (α) of each sorting plate (28) is adjusted, and the swing angle (θ) of the special number sorting plate (29) is adjusted by the motor (45) to adjust the position of the drive shaft (43). It is configured to perform adjustment.

Further, the sorting plates (2θ) are provided horizontally with an inclination angle of 0 degrees in the front-rear direction, and there are grain supply ports (52) from the hopper (22) near the left and right inclined upper ends of the front ends of each sorting plates (29). In addition, a brown rice discharge port (53) is provided at the rear end of each sorting plate (29) on the left and right inclined uppermost end, and a paddy discharge port (54) is provided at the left and right inclined lowermost end of the front end of each sorting plate (23). At the same time, a partition plate (55) is provided along the longitudinal direction near the left and right inclined lower ends of the plate surface of each sorting plate (29).

Each sorting plate (29) applies a feeding action to the left diagonally rearward as shown by the solid line arrow in Figs. Formed into a forced grain transfer element (5B) with an inclined uneven shape that urges,
On the entire plate surface on the lower end side of the slope bounded by the partition plate (55), there is a forced grain transfer element (57) with an inclined uneven shape that urges the grain to feed forward to the left side as shown by the solid line arrow in the same figure. ), and when each sorting plate (29) swings left and right, the partition plate (
55) While the grains on the left side of the plate move from the front end to the rear end due to the action of the transfer element (5B), the friction coefficient
Due to differences in specific gravity, grain size, etc., the brown rice layer (A) was separated and concentrated on the left side of the uphill side, the paddy layer (B) on the right side of the uphill side, and the mixed rice layer (C) in the middle. It is configured as follows.

By the way, the front and rear ends of the partition plate (55) and each sorting plate (23
) are provided with front and rear grain circulation paths (58, 59) between the front and rear side walls (28a, 28a), and the partition plate (5
5), the paddy layer (B) and the mixed rice layer (C), which are on the left side of the plate and concentrated toward the partition plate (55), are transferred to the rear grain circulation path (58).
) to the right plate surface from the partition plate (55), and on this right plate surface, while moving on the right plate surface from the rear end to the front end by the action of the transfer element (57). Mixed rice layer (C) is placed on the partition plate (55) side on the right swinging up side, and paddy is on the right end side of the board surface on the left swinging down side! (B) is separated and concentrated again, and when it reaches the front end side of the plate surface, the paddy layer (B) is separated from the paddy discharge port (50).
At the same time, the mixed rice layer (C) is returned to the left surface of the partition plate (55) via the previous grain circulation path (59) for re-sorting.

The partition plate (55) also has a partition position adjustment handle (6).
The width of the circulation path (58) (59) can be adjusted by connecting it to the handle screw shaft (81) of the brown rice and paddy outlet (53) (54). 82) (83) are provided respectively, and the opening adjustment handles (84) (85) of these shutters (62) (63) are provided respectively.
) of the handle screw shafts (6B) (87) to adjust the amount of brown rice and paddy discharge.
) (85) It is configured to be performed by operation.

Furthermore, a photoelectric mixing ratio sensor (88) is installed in the paddy outlet gutter (54a) of the paddy outlet (53) to detect the mixing ratio of brown rice mixed into the paddy layer, as shown in FIG. The sensor (88) and a mixing ratio setting device (63) for setting this reference value are input connected to a control circuit (70), and the tilt angle large/small circuit (71) (7) is connected to the motor (39).
2), the control circuit (70) is connected as an output,
The motor (3) is controlled based on the detected value of the sensor (88).
9) to drive and control the horizontal inclination angle (α) of each sorting plate (28).
The motor (39) is adjusted so that the sorting plate (29) returns to the original standard setting inclination angle when mixed rice is no longer detected, that is, when grains no longer flow on the plate surface. It is configured to drive and control.

Furthermore, as shown in FIG.
B), a selection wind force setting device (73) for setting this reference value, and a maximum load detector (70) for detecting the maximum load of the motor (27) from the motor current value. , an increase/decrease circuit (77) and a drive circuit (
78), the control circuit (75) is output-connected to drive the motor (27) at increased speed when the sensor (2B) detects that the sorting air force in the sorting air passage (14) decreases. The rotation of the dust suction/exhaust fan (17) is adjusted to a large degree to maintain a constant flow rate of the sorting wind, and the motor (27)
When the detector (74) detects that the driving load reaches the maximum, the alarm device (76) is activated to alert the operator.

This embodiment is constructed as described above, and the grains from the supply port (52) are fed to the partition plate (55) of each sorting plate (29).
), the brown rice layer (A), the mixed rice layer (C), and the paddy layer (8 ), and the brown rice group of the brown rice layer (A) is taken out to the brown rice discharge port (53), and the mixed rice and paddy layers of the mixed rice layer (C) and the paddy layer (B) are circulated. Each sorting plate (2
The mixed rice layer flows from the partition plate (55) of 9) onto the right plate surface and moves from the rear end to the front end on the plate surface by the feeding action of the forced transfer element (57) at the chain part. (C) and paddy layer (B
), the paddy layer of the paddy layer (B) is taken out to the paddy discharge port (54), and only the mixed rice group of the mixed rice layer (C) is returned to the original supply side via the circulation path (58). They are returned to the factory and re-sorted again.

During this operation, when the proportion of unpolished rice in the paddy layer taken out to the paddy discharge port (54) increases or decreases from the standard, the motor (38) is controlled to be driven in the forward or reverse direction and the sorting plate The horizontal inclination angle (a) of (29) is adjusted to be large or small, and the proportion of brown rice mixed in is maintained at a constant state, thereby preventing brown rice loss.

On the other hand, in the rice huller (1), the exhaust duct (16
) When the stored rice husk dust discharged from the duct (15) (1B) is full or the intake/exhaust resistance in the duct (15) (1B) increases, the sorting air force in the sorting air passage (14) decreases and
When the air intake at 9) decreases, said sensor 26
) detects this, increases the rotation speed of the motor (27), adjusts the rotation of the dust suction/exhaust fan (17) to a large degree, and controls the fan (
17) to maintain a constant sorting force by increasing the suction force at the maximum load detector (17).
74) detects the maximum load of the motor (27), it activates the alarm device (76) to warn if the paddy Z storage is full or when the paddy storage is full (
15) This is to warn the operator of clogging in (1B) to prevent accidents such as burnout of the motor (27).

In addition, the said partition board (55) is Wf! Although the I5 configuration is flexible, a fixed type may also be used.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a method for separating and sorting brown rice and paddy on the plate surface of the sorting plate (29).

A partition board (5) that circulates the mixed rice of brown rice and paddy on the board
5), there is no need to take out the mixed rice from the sorting machine and return it to the grain supply side of the sorting machine, which is the case in the past. It enables high-precision separation and sorting of brown rice and paddy using an extremely simple method of just circulating it, which simplifies the overall configuration of the sorting machine (21), reduces costs, makes it economical, and improves work efficiency. It has remarkable effects, such as being able to

[Brief explanation of the drawing]

Fig. 1 is an explanatory plan view of the oscillating sorter, Fig. 2 is an overall explanatory view of the oscillating sorter and paddy WJ machine, Fig. 3 is an explanatory view of the oscillating drive part of the oscillating sorter, and Fig. 4 is an explanatory diagram of the oscillating sorter. The figure is an explanatory diagram of the same side part, FIG. 5 is an explanatory diagram showing the same plane state, and FIGS. 6 to 7 are electrical control circuit diagrams. (29)... Sorting board (55)... Partition board

Claims (1)

[Claims] A grain sorting machine characterized in that a partition plate is provided on the plate surface of a sorting plate that separates and sorts brown rice and paddy, and allows a mixed rice of brown rice and paddy to circulate on the plate surface.