JPH0220065Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a sorting tube that rotates continuously in one direction to separate the mixed rice after hulling into brown rice and paddy, and the separated paddy is sent to the hulling section through the paddy return gutter. Regarding the rice hulling machine configured to perform rice reduction, a grain sensor for detecting the mixing ratio of brown rice and paddy is provided in the rice rice reduction gutter, and the sensor is provided in the roll gap adjustment mechanism that adjusts the gap between derolls in the hulling section. Connect the
By controlling the shedding rate by controlling the mixing ratio of brown rice and paddy to be reduced in the hulling section, for example, the shedding rate decreases and the amount of paddy returned to the hulling section increases, thereby increasing the ratio of the amount of brown rice to the amount of paddy. When reducing the mixing ratio of so-called brown rice, which has a small amount of rice, the roll gap is reduced to increase its removal rate, and conversely, the mixing ratio of so-called brown rice, which has a large amount of reduced brown rice compared to the amount of reduced paddy, is increased. Sometimes, the gap between the rolls is expanded and the shedding rate is adjusted to a small value in order to maintain a constant shedding rate and stable sorting performance, thereby ensuring good hulling work and stable sorting work, which improves work efficiency. The purpose is to provide an extremely excellent mixed rice sorting device for a huller.

Embodiments of the present invention will be described in detail below based on the drawings.

Fig. 1 is a front view of the whole, Fig. 2 is a side view of the same, and Fig. 3 is a cross-sectional view of the same. A pair of derollers 3 and 4 are provided inside the roll.

In the figure, 5 is the wind sorting section on which the hulling section 1 is placed, the first gutter 6 and the brown rice conveyor 7 for taking out the brown rice.
, a small rice storage section 8 provided adjacent to the first gutter 6, a second gutter 10 facing below the unrolled grains 3 and 4 via a grain board 9 for extracting mixed rice, and a mixed rice conveyor 11. and a third gutter 12 adjacent to the second gutter 10 for taking out the rice cake, and a rice cake conveyor 13;
A dust suction/discharge fan 14 forming a sorting air passage above the first to third gutter 6, 10, 12 and the rice collecting section 8, and a brown rice thrower 15 communicating with the brown rice conveyor 7 and mixed rice conveyor 11, respectively. and a mixed rice thrower 16.

In the figure, 17 is a mixed rice sorting section installed in parallel with the hulling section 1, and as shown in FIG. , support rolls 20 and 21 that rotatably support the sorting tubes 18 and 19, respectively.
, a mixed rice hopper 22 that faces the delivery end of the mixed rice thrower 16, a mixed rice supply gutter 23 that communicates the feed start end side with the hopper 22 and inserts the feed end side into the upper sorting cylinder 18; A rice supply conveyor 24, an upper brown rice receiving gutter 25 that is inserted into the sorting tube 18 to take out the brown rice inside the sorting tube 18, an upper brown rice take-out conveyor 26, and a delivery end of the gutter 25 communicating with the lower sorting tube 19. a feed gutter 27 for returning the paddy inside the upper sorting tube 18 to the hopper 2, and a paddy gutter 28 for returning the paddy inside the upper sorting tube 18 to the hopper 2;
A lower brown rice receiving gutter 29 and a lower brown rice take-out conveyor 30 are inserted into the sorting tube 19 to remove brown rice from inside the sorting tube 19.
A brown rice gutter 31 that communicates the delivery end of the gutter 29 with the first gutter 6, and a mixed rice gutter 32 that returns the paddy inside the lower sorting tube 19 to the second gutter 10.

In the figure, reference numeral 33 denotes an electric motor that drives the hulling section 1, wind sorting section 5, and sorting section 17. The output pulley 34 of the motor 33 and the counter pulley 35 are connected by a belt 36. The drive pulley 37, idle pulley 38, and counter pulley 35 are connected by a belt 39, and the brown rice conveyor 7, mixed rice conveyor 11, rice cake conveyor 13, and dust suction/discharge fan 14 are connected to the counter pulley 35 and each pulley. 40,41,4
2, 43 and a belt 44, and a sorting drive pulley 45 which also operates in conjunction with the idle pulley 38, and each pulley 46, 47, 48, 49, 5.
0 and each conveyor 24, 2 by the belt 51
6, 30 and support rolls 20, 21 are connected.

Further, in the figure, numeral 52 is a feed-out roll provided at the lower supply port of the hopper 2, 53 is a grain flow valve for adjusting the amount of grain supplied, and 54 is a lower base end supported on a support shaft 55, and an intermediate part is the unrolling roll. One end of the adjustment link 55 is connected via a slider 58 to a rotary screw shaft 57 of a motor 56 which is a roll gap adjustment mechanism, and by driving the motor 56 in the forward and reverse directions. The gap c between the rolls 3 and 4 is expanded or reduced to control the removal rate.

Furthermore, 59 is a photoelectric grain sensor for detecting brown rice and paddy installed in the paddy return gutter 28, and the sensor 59 detects the paddy separated by the upper sorting tube 18 flowing down inside the paddy return gutter 28. It is configured to irradiate a light beam, receive the reflected light, and detect the mixing ratio of brown rice mixed in the paddy from the difference in the amount of reflected light between the paddy and brown rice (the amount of reflected light is paddy>brown rice).

FIG. 5 shows a decontrol circuit diagram, in which the grain sensor 59 is connected via an amplifier 62 to a control circuit 61 connected to a brown rice standard setting device 60 that sets the standard mixing ratio of brown rice mixed in paddy. At the same time, the control circuit 61 is connected to the motor 56 via the gap expansion and gap reduction circuits 63 and 64, so that the amount of light detected by the sensor 59 increases or decreases depending on the mixing ratio of brown rice, and the control circuit 61 is connected to the motor 56 through the gap expansion and gap reduction circuits 63 and 64. When a difference in light intensity occurs between the reference light intensity and the reference light intensity set by the control circuit 60, the control circuit 61 outputs a forward/reverse signal for the motor 56, and the motor 56 is adjusted in the normal direction to match the reference light intensity and the detected light intensity. The rollers are driven in reverse to properly control the expansion and contraction of the gap c between the rolls 3 and 4.

The present embodiment is constructed as described above, and when paddy is put into the hopper 2, the paddy is removed by the derolls 3 and 4, and the brown rice and paddy that fall through the grain board 9 are removed. The rice falls into the second gutter 10, is taken out by the mixed rice conveyor 11, and is lifted up to the mixed rice hopper 22 by the mixed rice thrower 16.
At this time, the grains falling into the third gutter 12 are discharged out of the machine by the grain conveyor 13, and the rice grains are discharged together with dust by the dust suction fan 14. Mixed rice (brown rice and paddy) carried into the hopper 22
The mixed rice is transferred to the upper sorting cylinder 1 by the conveyor 24.
8, the mixed rice is stirred so as to come into contact with the inner circumferential surface of the upper sorting cylinder 18 that rotates continuously in one direction as shown in FIG. The brown rice that is inserted is lifted upward and falls onto each upper surface of the upper brown rice receiving gutter 25, and the brown rice inside the gutter 25 is transferred to the lower sorting tube 19 by the upper brown rice take-out conveyor 26 via the feeding gutter 27. While one end is carried inward, the upper sorting cylinder 18
Since the paddy that does not fit into the recessed hole 18a on the inner circumferential surface slides down and moves to the other end of the sorting tube 18, the paddy is returned to the hopper 2 via the paddy return gutter 28 and re-hulled. Also, since some paddy is mixed in the brown rice carried into the lower sorting tube 19 via the feed gutter 27, the brown rice and the paddy are further separated by the lower sorting tube 19 in the same way as the upper sorting tube 18, and then The brown rice falling into the brown rice receiving gutter 29 is transferred to the lower brown rice take-out conveyor 3.
0 to the brown rice gutter 31, and the brown rice that falls from the brown rice gutter 31 to the first gutter 6 is carried out of the machine by the brown rice thrower 15, and the paddy inside the lower sorting tube 19 is mixed with some brown rice. In this state, the rice drops from the other end of the sorting tube 19 to the second gutter 10 via the mixed rice gutter 32, and the paddy containing brown rice is returned to the mixed rice hopper 22 and re-sorted.

During such work, the internal sorting state of the upper sorting tube 18 is detected by the grain sensor 59, and the sensor 59 detects that the amount of brown rice mixed in the sorted paddy flowing down the paddy return gutter 28 is less than the standard. When the amount of light becomes large, the motor 56 is driven forward or backward to reduce the roll gap c and increase the removal rate. Along with this, the amount of brown rice mixed in the mixed rice supplied to the upper sorting tube 18 also increases, and the amount of brown rice mixed in the mixed rice supplied to the upper sorting tube 18 increases.
When the mixing ratio of paddy and brown rice in the container reaches a substantially constant ratio that meets the appropriate sorting conditions, the mixing ratio in the reducing gutter 28 also becomes the standard, and the sensor 59 stops its detection. As a result, poor sorting such as paddy contamination in the brown rice receiving gutter 25 when the amount of reduced brown rice is less than the standard can be eliminated.

On the other hand, contrary to the above, when the amount of brown rice mixed into the paddy is larger than the standard and the amount of light detected by this sensor 59 becomes small, the motor 56 is driven in reverse or forward rotation to adjust the roll gap c to a large value. to reduce the evacuation rate. Along with this, the amount of brown rice mixed in the mixed rice supplied to the upper sorting tube 18 also decreases, and as described above, the amount of brown rice mixed in the mixed rice supplied to the upper sorting tube 18 decreases.
Sorting work is carried out with the mixing ratio of paddy and brown rice in the rice bowl 8 set at an appropriate ratio. As a result, when the amount of reduced brown rice is greater than the standard, it is possible to prevent the rice from becoming loose or broken due to double grinding of the brown rice. By maintaining the sorting conditions in the sorting tube 18 constant in this way, the sorting performance can be stably maintained.

As is clear from the above embodiments, the present invention has a sorting tube 18 that is continuously rotated in one direction to separate the mixed rice after hulling into brown rice and paddy, and the separated paddy is passed through the paddy return gutter 28. In the structure in which rice is returned to the rice hulling section 1, a grain sensor 59 for detecting the mixing ratio of brown rice and paddy is provided in the rice grain reducing gutter 28, and a gap c between the derolling parts 3 and 4 of the hulling section 1 is adjusted. A sensor 59 is connected to the roll gap adjustment mechanism 56 to control the removal rate by adjusting the mixing ratio of brown rice and paddy to be returned to the hulling section 1. When the amount of paddy to be reduced to 1 is large and the amount of brown rice is small, that is, the mixing ratio of brown rice in the paddy is small, the roll gap c is reduced to increase the removal rate. When the amount of reduced brown rice is large and the amount of reduced brown rice is small, so-called a state where the mixing ratio of brown rice in the paddy is large, the roll gap c can be expanded to adjust the removal rate to a small value, and as a result, the amount of reduced brown rice in the sorting tube 18 is It is possible to perform good sorting work with stable sorting performance by always maintaining the sorting conditions constant, and good hulling work that minimizes the occurrence of loose rice or broken rice, which significantly improves work efficiency. It has remarkable effects such as being able to

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall front view, FIG. 2 is a side view of the same, FIG. 3 is a sectional view of the same, FIG. 4 is a partially enlarged sectional view, and FIG. The figure is an electrical circuit diagram. 1... Husking section, 3, 4... De-rolling, 18...
...Sorting tube, 28...Paddy return gutter, 56...Roll gap adjustment mechanism (motor), 59...Grain sensor, c
...Roll gap.

Claims (1)

[Scope of utility model registration request] The structure has a sorting cylinder that rotates continuously in one direction to separate the mixed rice after hulling into brown rice and paddy, and the separated paddy is returned to the hulling section through the paddy reducing gutter. A grain sensor is provided to detect the mixing ratio of brown rice and paddy, and the sensor is connected to a roll gap adjustment mechanism that adjusts the gap between unrolls in the hulling section, and the brown rice and paddy are returned to the hulling section. A mixed rice sorting device for a huller, characterized in that it is configured to control the removal rate even at a mixing ratio of .