JPH0734872B2 - 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 fed to a whitening chamber, and to rotationally drive a whitening roll. A load sensor that detects the size of the required load is installed, and a flow rate adjustment valve is installed in the path that feeds raw brown rice into the brewing room. Immediately after the start of operation, the load detected by the load sensor first rises to the first specified value. It is determined that the polishing chamber is filled with brown rice, the flow control valve is closed to prevent brown rice from flowing into the polishing chamber, and the polishing operation is performed. The load detected by the load sensor is the second specified value. It is characterized in that a control unit is provided for detecting the decrease in the temperature, opening the flow rate adjusting valve, and thereafter continuously supplying brown rice to the polishing chamber to perform the polishing operation.

The load sensor is preferably a torque sensor.

Action According to this configuration, brown rice flows into the polishing chamber through the flow rate adjusting valve until the load required to drive the polishing roll immediately after the start of operation increases first. When the control unit detects that the detection load has increased first, it closes the flow rate adjustment valve to perform whitening processing, and when it detects that the detection load has decreased, it opens the flow rate adjustment valve and the succeeding brown rice. The whitening treatment is carried out while pouring into the whitening chamber, the internal pressure of the whitening chamber rises, and the rice that has flowed into the whitening chamber for the first time and which has been fully milled is discharged from the whitening chamber, and the continuous whitening treatment is 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. In addition, the support shaft of the pulley 19
A torque sensor 45 as a load sensor is interposed between 44 and the rotating shaft 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 brown rice A has approached the whitening chamber 2 and the detected torque St of the torque sensor 45 has reached the first set value, the motor 11 so that the brown rice supply path 9 is temporarily closed.
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 detected torque St of the torque sensor 45 has dropped to the second set value or less due to the progress of the whitening process and the end of the rice polishing, the motor 11 so that the brown rice supply path 9 is fully opened. Is operated to raise the gate 10 of the opening degree regulation plate 12. 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.

The motor 30 uses the torque sensor 45 to detect the detected torque St
This detected value St is based on the set value according to the target straining accuracy.
It is operated so as to rotate in a direction approaching S ₀ .

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.

Although the torque sensor is used as the load sensor in the above-described embodiments, other sensors capable of detecting the magnitude of the load may be used.

EFFECTS OF THE INVENTION As described above, according to the present invention, a load sensor for detecting the magnitude of the load required 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 load detected by the load sensor has risen to the first specified value, and it is determined that the polishing room is filled with brown rice, and the flow rate is adjusted so that brown rice does not flow into the polishing room. The valve is closed to perform the whitening operation, the load detected by the load sensor is detected to have dropped to the second specified value, the flow rate adjustment valve is opened, and then brown rice is continuously supplied to the whitening chamber to perform the whitening operation. Since the control unit is provided, even if the brown rice that first flows into the milling chamber can be sufficiently processed between the time when the flow rate control valve is closed and the time when it is opened, the first brown rice can be processed at the start of operation. It is possible to avoid a situation in which is discharged without being refined.

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.

Further, when the load sensor and the torque sensor are used, the change in the load can be detected extremely accurately only by interposing the sensor between the whitening roll and the power source, and the flow control valve can be appropriately controlled.

[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 rate adjustment valve, 45 ... Torque sensor [load sensor], 46 ...
… Control unit.

Claims (2)

[Claims] 1. A load for rotatively driving a whitening roll arranged in a whitening chamber to whiten brown rice fed into the whitening chamber, and for detecting a magnitude of a load required for rotationally driving the whitening roll. A sensor is provided, and a flow rate adjusting valve is provided in the path for feeding the raw brown rice in the brewing room. Immediately after the start of operation, it is first detected that the load detected by the load sensor has risen to the first specified value, and the brewing room When it is determined that the brown rice has been filled with the brown rice, the flow control valve is closed so that the brown rice does not flow into the whitening chamber, and the whitening operation is performed, and it is detected that the load detected by the load sensor has dropped to the second specified value. After opening the flow rate control valve, the rice polishing machine was equipped with a control unit that continuously supplies brown rice to the whitening chamber to perform whitening operation. 2. A polishing roll arranged in the polishing chamber is rotatably driven to polish the brown rice fed into the polishing chamber, and between the polishing roll and a power source for rotating the polishing roll. A torque sensor installed to detect the transmission torque is installed, and a flow rate adjusting valve is installed in the path for feeding the raw brown rice to the milling room, and immediately after the start of operation, the detection load of the torque sensor reaches the first specified value. Detecting that it has risen, it is judged that the brown rice is full in the whitening chamber, the flow control valve is closed to prevent brown rice from flowing into the whitening chamber, and the whitening operation is performed. The detection load of the torque sensor is the second regulation. A rice milling machine provided with a control unit for detecting the decrease in the value and opening the flow rate adjusting valve and thereafter continuously supplying brown rice to the whitening chamber for whitening operation.