JPH0734871B2 - 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 Problem The rice polishing machine of the present invention closes the white rice outlet of the whitening chamber with an opening control plate, arranges a whitening roll in the whitening chamber, and at one end of the whitening roll at the brown rice inlet side of the whitening chamber. Provided with a feed roll that rotates together with the milling roll and pushes the brown rice into the milling chamber, drives the milling roll and the feed roll to feed the brown rice into the milling chamber, and when the internal pressure of the milling chamber rises to a specified value, the opening degree is regulated. In a rice polishing machine that lowers the plate and discharges the rice that has been completely milled from the white rice outlet, a flow rate control valve was installed in the route that feeds the raw brown rice into the milling chamber via the feed roll, until the specified time has elapsed from the start of operation. Is so that the internal pressure of the polishing chamber does not rise to the specified value required to push down the opening regulation plate,
It is characterized in that a control unit for increasing the opening degree of the flow rate adjusting valve with the passage of time from the start of operation is provided.

Action According to this configuration, the opening degree of the flow rate adjusting valve is small immediately after the start of operation, and the brown rice flows little by little into the polishing chamber through the flow rate adjusting valve. The control unit increases the opening degree of the flow rate adjusting valve with the lapse of time, the internal pressure of the polishing chamber rises to the specified pressure after a specified time from the start of operation, and discharge from the polishing chamber is started.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a rice polishing machine 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 is interposed between 44 and the rotating shaft of the motor 21.

At the start of operation when the polishing chamber 2 is empty and the motor 21 is started, the control unit is moved in the direction of pulling up the gate 10 of the opening regulating plate 12.
46 drives the motor 11. Gate 10 pulling speed is
As shown in FIG. 2, the opening degree of the brown rice supply path 9 is expanded at a constant speed V. The constant speed V is set so that the amount of brown rice A equivalent to the capacity of the whitening chamber 2 slowly flows into the whitening chamber 2 from the supply hopper 1 over time T, and until the time T elapses from the start of operation The internal pressure of 2 does not rise to the specified value required to push down the opening regulating plate 23 against the tampering of the compression spring 40, and is not discharged from the outlet 8 during this period. Therefore, the brown rice A supplied to the brewing chamber 2 immediately after the start of operation stays in the brewing chamber 2 for at least the time T and is subjected to the rice polishing treatment. Is released.

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-described embodiment, the opening degree of the flow rate adjusting valve 12 is continuously controlled to be large at the speed V with the passage of time, but as shown in FIG. Set the opening O ₁ and then set the second opening O ₂ which is larger than the first opening O ₁ and the amount of brown rice in the polishing chamber 2 for a time T from the start of operation. The same applies to the case where the control unit 46 is configured to supply.

As described above, according to the present invention, the white rice outlet of the whitening chamber is closed by the opening control plate, the whitening roll is arranged in the whitening chamber, and one end of the whitening roll is whitened on the brown rice inlet side of the whitening chamber. A feed roll that rotates together with the roll and pushes the brown rice into the milling chamber is provided, and the milling roll and the feed roll are rotationally driven to feed the brown rice into the milling chamber, and when the internal pressure of the milling chamber rises to a specified value, the opening control plate In the rice milling machine that lowers the milled rice to discharge the milled rice from the white rice outlet, a flow rate control valve is provided in the route for feeding the raw brown rice into the milling chamber via the feed roll, and until the specified time elapses from the start of operation. A control unit that increases the opening of the flow rate adjustment valve with the passage of time from the start of operation is provided so that the internal pressure of the whitening chamber does not rise to the specified value required to push down the opening regulating plate. Adjust the flow rate of brown rice It can be supplied little by little to the brewing room via a valve, and the internal pressure of the brewing room can be raised to the specified pressure after a specified time from the start of operation, so that the first unpolished rice is discharged without being polished at the start of operation. It is possible to avoid such a situation.

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]

FIG. 1 is a longitudinal sectional view of an embodiment of a rice polishing machine of the present invention, FIG. 2 is a control characteristic diagram of a control unit of the same apparatus, and FIG. 3 is a control characteristic diagram of another embodiment of the control unit. 1 ... Supply hopper, 2 ... Whitening room, 8 ... Exit, 9 ...
… Brown rice supply route, 10 …… Gate, 11 …… Motor, 12 ……
Flow rate adjusting valve, 46 ... Control unit.

Claims (1)

[Claims] 1. A white rice outlet of a polishing chamber is closed by an opening control plate,
A milling roll is installed in the milling room, and a feed roll that rotates together with the milling roll and pushes the brown rice into the milling chamber is installed at one end of the milling roll on the brown rice inlet side of the milling chamber, and the milling roll and feed roll are driven to rotate. The unpolished rice into the brewing room, and when the internal pressure of the brewing room rises to the specified value, the opening control plate is lowered and the milled rice is discharged from the white rice outlet to the brewing room via the feed roll. A flow rate control valve was installed in the path for feeding the raw brown rice, and the operation was performed so that the internal pressure of the whitening chamber did not rise to the specified value required to push down the opening regulation plate until the specified time has elapsed from the start of operation. A rice polishing machine provided with a control unit for increasing the opening of the flow rate adjusting valve with the lapse of time from the start.