JPH0734873B2 - Rice mill - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice milling machine for treating brown rice into polished rice.

Conventional technology If the raw brown rice is put into the rice mill at the start of operation, the first brown rice will be discharged without being milled. Therefore, conventionally, a circulating transfer route for re-supplying the treated rice first discharged from the rice mill to the rice mill is also provided [JP-A-62-1274].
No. 54].

Problems to be Solved by the Invention When the transfer route for recirculation is provided from the outlet of the rice polishing machine to the inlet of the rice polishing machine as described above, there is a problem that the device becomes large.

It is an object of the present invention to provide a rice milling machine in which the first unpolished rice is not discharged unmilled at the start of operation and the apparatus can be downsized.

Means for Solving the Problems The rice polishing machine of the present invention is configured to rotationally drive a whitening roll arranged in a whitening chamber to whiten brown rice sent to the whitening chamber, and power for rotationally driving the whitening roll. A current detector for detecting the value of the current flowing through the source is provided, a flow rate adjusting valve is provided in the path for feeding the raw brown rice into the milling room, and the current detected by the current detector is first specified immediately after the start of operation It is detected that the brown rice is full in the polishing room by detecting that it has risen to a value, the flow control valve is closed to prevent brown rice from flowing into the polishing room, and the polishing operation is performed. It is characterized in that a control unit is provided which detects that the temperature has dropped to the second specified value, opens the flow rate adjusting valve, and thereafter continuously supplies brown rice to the whitening chamber to perform a whitening operation.

Action According to this configuration, brown rice flows into the polishing chamber through the flow rate adjusting valve until the load current of the power source for driving the polishing roll increases first immediately after the start of operation. When the control unit detects that the load current of the power source first becomes large, the flow rate adjusting valve is closed to perform whitening processing, and when it is detected that the load current becomes small, the flow rate adjusting valve is opened. Then, the whitening process is performed while pouring the subsequent brown rice into the whitening chamber, the internal pressure of the whitening chamber rises, and the rice that has flowed into the whitening chamber first and fully processed is discharged from the whitening chamber, and the continuous whitening process is performed. Can be continued.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The drawings show a rice mill of the present invention. The brown rice supply path 9 from the supply hopper 1 to the milling chamber 2 is provided with a flow rate adjusting valve 12 having a structure in which a gate 11 is moved up and down by a motor 11 so that the opening can be changed.

The feed roll 13 and the whitening roll 14 are attached to a hollow shaft 17 rotatably supported from the fixed side via bearings 15 and 16. The shaft 17 is rotationally driven by a motor 21 via pulleys 18 and 19 and a belt 20. A shaft 22 is supported to be movable up and down inside the shaft 17, and a disc-shaped opening regulating plate 23 is attached to the lower end of the shaft 22. twenty four
Is an outlet forming member which is arranged at the bottom of the polishing chamber 2 in the vicinity of the opening degree regulating plate 23 and is formed in an annular shape. A net 25 for separating the white rice and the bran is provided around the polishing roll 14 inside the polishing chamber 2. 26 is an actuator for moving the shaft 22 up and down, the center of which is pivotally supported from the fixed side,
A lever 27 having one end E ₁ engaged with the upper end of the shaft 22, a screw shaft 29 having a feed screw 28 formed thereon, a motor 30 for rotating the screw shaft 29, and a hole 31 having an inner diameter larger than the diameter of the screw shaft 29. With a pin 32 that engages with the other end E _{2 of the} lever 27 and has an outer periphery formed with a cylindrical body 33, and an upper end E ₃ is screwed into a feed screw 28 of a screw shaft 29, and a lower end E ₄ is provided with a screw shaft. Hole with an inner diameter larger than 29 diameter 34
Has a U-shaped frame body 35 in which is bored and a hole 36 having an inner diameter larger than the diameter of the screw shaft 29, and is inserted into the screw shaft 29 between the upper end E ₃ of the frame body 35 and the cylindrical body 33. Plate 37 and hanging rods 38, 3 that support the plate 37 so that the plate 37 does not rotate as the screw shaft 29 rotates.
9 and compression springs 40 and 41. Here, the biasing force of the compression spring 40 is larger than that of the compression spring 41, and the plate 37
Is pushed down to a position where it comes into contact with the stopper nuts 42 and 43 as shown in the figure. Further, a current detector 45 is provided in the power supply circuit of the motor 21.

At the start of the operation when the polishing chamber 2 is empty and the motor 21 is started, the motor 11 is operated by the control unit 46 so that the gate 10 of the opening degree regulating plate 12 is pulled up to the first opening degree, and the gate 11 passes through the brown rice supply path 9. Brown rice A begins to flow into the rice polishing room 2. Immediately after the operation, the internal pressure of the polishing chamber 2 does not rise to a specified value required to push down the opening degree regulating plate 23 against the irregularity of the compression spring 40, and is not discharged from the outlet 8 during this period. . Therefore, the brown rice A supplied to the polishing chamber 2 immediately after the start of operation stays in the polishing chamber 2 and undergoes a rice polishing treatment. When the control unit 46 detects that the polished rice 2 is nearly filled with brown rice A and the detected current value It of the current detector 45 has reached the first set value, the motor for temporarily closing the brown rice supply path 9 is provided. 11 is operated to lower the gate 10 of the opening control plate 12. In this way, the operation is performed without pouring brown rice A into the rice polishing chamber 2, and the brown rice A flowing into the polishing chamber 2 immediately after the start of operation is sufficiently whitened. When the control unit 46 detects that the milling process has progressed and the end of milled rice is approaching and the detected current value It of the current detector 45 has fallen below the second set value, the brown rice supply path 9 is fully opened. Opening control plate 12 by driving motor 11
Raise Gate 10 of. When the gate 10 is raised, the brown rice A flows into the rice polishing chamber 2 and the internal pressure rises to push down the opening regulating plate 23 and the rice 8 is discharged from the outlet 8 as white rice B. After that, the brown rice supply route 9 is kept fully open and continuous rice processing is carried out.

Air 48 is blown into the inner passage 47 of the shaft 17, and the air 48 passes through a hole 49 formed in the shaft 17 and a hole (not shown) formed in the whitening roll 14 and a net 25. The bran flows to a passage 50 different from the outlet 8, and the bran separated by the whitening treatment passes through the net 25 and is discharged to the passage 50.

In the above embodiment, the flow control valve 12 has a structure in which the gate 10 can be moved up and down to change the opening, but the same applies to a rotary valve.

As described above, according to the present invention, the current detector for detecting the current value flowing in the power source for rotationally driving the whitening roll is provided,
A flow rate control valve was installed in the path for feeding the raw brown rice into the polishing room.
Immediately after the start of operation, it is first detected that the detected current value of the current detector has risen to the first specified value, and it is determined that the polishing room is filled with brown rice so that the brown rice does not flow into the polishing room. Closing the flow rate control valve for whitening operation, detecting that the detected current value of the current detector has dropped to the second specified value, opening the flow rate control valve, and then continuously supplying brown rice to the whitening chamber. Since a control unit for whitening operation was provided, it is possible to sufficiently process even the first brown rice that has flowed into the whitening chamber between the time the flow control valve is closed and the time it is opened.
It is possible to avoid the situation where the first unpolished rice is discharged without being milled at the start of operation.

Moreover, since it is only necessary to provide the flow rate adjusting valve, it is possible to reduce the size of the device without requiring the transfer device for circulation found in the conventional device.

[Brief description of drawings]

The drawing is a vertical sectional view of an embodiment of the rice milling machine of the present invention. 1 ... Supply hopper, 2 ... Whitening room, 8 ... Exit, 9 ...
… Brown rice supply route, 10 …… Gate, 11 …… Motor, 12 ……
Flow control valve, 45 ... Current detector, 46 ... Control section.

Claims (1)

[Claims] 1. A current for detecting a current value flowing through a power source for rotating and driving a whitening roll, which is configured to rotate and drive a whitening roll disposed in a whitening chamber to whiten brown rice fed into the whitening chamber. A detector is provided, and a flow rate adjusting valve is provided in the path for introducing the raw brown rice into the whitening chamber, and immediately after the start of operation, it is detected that the detected current value of the current detector has risen to the first specified value When it is determined that the browning room is filled with brown rice, the flow control valve is closed so that the brown rice does not flow into the polishing room, the whitening operation is performed, and the detected current value of the current detector has dropped to the second specified value. Is detected and the flow rate control valve is opened, and thereafter, a rice polishing machine is provided with a control unit for continuously supplying brown rice to the whitening chamber for whitening operation.