JPH03101849A - Rice milling machine - Google Patents

Abstract

PURPOSE:To miniaturize a rice milling machine by providing a flow rate regulating valve to the introducing route of unpolished rice for a raw material and providing a controlling part for enlarging the opening of this introducing route according to the lapse of time. CONSTITUTION:When a motor 21 is driven in the state of a vacant milling chamber 2, a controlling part 46 operates a motor 11 in the direction to which the gate 10 of an opening regulating plate 12 is pulled up. The pulling-up velocity of the gate 10 is regulated to constant velocity V and the opening of a feed route 9 of unpolished rice is enlarged. This constant velocity V is preset so that unpolished rice A equal to the capacity of the milling chamber 2 is slowly introduced thereinto from a feed hopper 1 while necessitating time T. Therefor, the pressure of the inside of the milling chamber 2 resists against the inaccuracy in a compression spring 40 and is not raised to the specified value only necessary to push down an opening regulating plate 25 until the time T lapses from start of operation. Therefor, unpolished rice A supplied to the milling chamber 2 is stagnated thereinto in a range over the time T, milled and treated. Thereby polishing defect can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice milling machine for milling brown rice into white rice.

Conventional technology: When raw brown rice is fed into a rice milling machine at the start of operation, the first brown rice is discharged without being polished.

For this reason, in the past, a circulating transfer path was provided to re-supply the processed rice discharged from the rice milling machine to the rice milling machine (Japanese Patent Laid-Open No. 62-227454, etc.).

Problems to be Solved by the Invention As described above, when a transfer path for recirculation is provided from the outlet of the rice milling machine to the inlet of the rice milling machine, there is a problem that the apparatus becomes large in size.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rice milling machine that prevents the first brown rice from being discharged without being polished at the start of operation and that can be made smaller in size.

Means for Solving the Problems The rice milling machine of the present invention is provided with a flow rate adjustment valve in the route for introducing the raw brown rice into the milling chamber, and increases the opening degree of the flow rate adjustment valve as time passes from the start of operation. It is characterized by being provided with a control section.

According to this configuration, the opening degree of the flow rate adjustment valve is small immediately after the start of operation, and brown rice flows into the milling chamber little by little through the flow rate adjustment valve. As time passes, the control unit increases the opening degree of the flow rate adjustment valve, and after a specified time from the start of operation, the internal pressure of the whitening chamber rises to the specified pressure, and discharge from the whitening chamber begins. .

EXAMPLE Hereinafter, an example of the present invention will be explained based on FIGS. 1 to 3. I will explain.

FIG. 1 shows a rice milling machine of the present invention. In the brown rice supply path 9 from the supply hot spring 1 to the milling room 2, there is a flow rate adjustment valve 1 whose opening degree can be varied by raising and lowering the gate 10 with a motor 1L.
2 is provided.

The feed roll l3 and the polishing roll 14 are mounted on bearings 15,
It is attached to a hollow shaft 17 that is rotatably supported from the fixed side via l6. Axis l7 is pulley 18, l9
It is rotationally driven by a motor 21 via a belt 20. A shaft 22 is supported inside the axis l7 so as to be able to rise and fall freely, and a disc-shaped opening regulating plate 23 is attached to the lower end of the shaft 22. Reference numeral 24 denotes an outflow port forming member disposed at the bottom of the whitening chamber 2 in close proximity to the opening degree regulating plate 23, and is formed in an annular shape. A net 25 for separating polished rice and bran is disposed around the whitening roll 14 inside the whitening chamber 2. 2B is an actuator for raising and lowering the shaft 22, the center of which is pivoted from the fixed side, one end E is engaged with the upper end of the shaft 22, a lever 27, a screw shaft 29 on which a feed screw 28 is formed, and a screw shaft. 29; a cylindrical body 33 having a hole 3l with an inner diameter larger than the diameter of the screw shaft 29 and a pin 32 formed on the outer periphery to engage with the other end E2 of the lever 27; A U-shaped frame 35 that is screwed onto the feed screw 28 of the screw shaft 29 and has a hole 34 with an inner diameter larger than the diameter of the screw shaft 29 at the lower end E4; hole 3
6, the plate 37 is inserted into the screw shaft 29 between the upper end E3 of the frame body 35 and the cylinder body 33, and the suspension rod 38 supports the plate 37 so that it does not rotate as the screw shaft 29 rotates. ，
39 and compression springs 40 and 41.

Here, the biasing force of the compression spring 40 is greater than that of the compression spring 4l, and the plate 37 is a nut for a stopper as shown in the figure.
It has been pushed down to the position where it touches 42 and 43. Furthermore, a torque sensor 45 is interposed between the support shaft 44 of the pulley l9 and the rotating shaft of the motor 2l.

At the start of operation when the milling chamber 2 is empty and the motor 21 is started, the control unit 46 operates the motor 1l in the direction of pulling up the gate 10 of the opening regulating plate l2. 10, the opening degree of the brown rice supply path 9 is expanded at a constant speed V, as shown in FIG. The constant speed V is set so that brown rice A corresponding to the capacity of the milling room 2 slowly flows from the supply hopper 1 to the milling room 2 over time T, and the milling continues until time T elapses from the start of operation. The internal pressure of the chamber 2 does not rise to the specified value required to push down the opening regulating plate 23 against the irregularity of the compression spring 40, and during this period, the outlet 8
It is not released from. Therefore, the brown rice A supplied to the milling chamber 2 immediately after the start of operation remains in the milling chamber 2 for at least a time T and undergoes the milling process, and then the opening regulating plate 23 is pushed down and the brown rice B is transferred from the outlet 8 to the milled rice B. and is released.

Air 48 is blown into the internal passage 47 of the shaft l7, and this air 48 flows through holes 49 made in the shaft l7, holes [not shown] made in the whitening roll I4, and the net 25.
The bran separated during the milling process passes through the screen 25 and is discharged into the passage 50.

In addition, the motor 30 is based on the occasionally detected torque St of the torque sensor 45, and this detected value St is a set value S according to the target pounding accuracy. Rotate in a direction that approaches ? being driven.

In the above embodiment, the opening degree of the flow rate regulating valve l2 was continuously controlled to a large extent at the speed V as time progressed, but as shown in FIG. Opening degree O
■, and then set the second opening degree 0■, which is larger than the opening degree 01 of the
The same effect can be obtained even if the control unit 46 is configured to supply brown rice to the milling room 2 by the same amount as the amount of brown rice.

Effects of the Invention As described above, according to the present invention, the control unit adjusts the opening degree of the flow rate adjustment valve provided in the path for introducing raw brown rice into the milling room as time elapses from the start of operation. In order to increase the amount of brown rice, brown rice is supplied to the milling chamber little by little through a flow rate adjustment valve, and the internal pressure of the milling chamber can be raised to the specified pressure after a specified time from the start of operation. It is possible to avoid a situation where the grain is discharged without being refined.

Moreover, since it is sufficient to provide only a flow rate regulating valve, there is no need for a circulation transfer device found in conventional devices, and the device can be downsized.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of the rice milling machine of the present invention, FIG. 2 is a control characteristic diagram of a control section of the same device, and FIG. 3 is a control characteristic diagram of another embodiment of the control section. 1... Supply hopper 2... Milling room, 8... Exit, 9... Brown rice supply route, IO... Game}, II...
- Motor, 12...Flow rate adjustment valve, 46...Control unit.

Claims (1)

[Claims] 1. A rice milling machine that is equipped with a flow rate regulating valve in the route for feeding raw brown rice into the milling chamber, and a control unit that increases the opening degree of the flow rate regulating valve as time passes from the start of operation.