JPH02135155A - Load controlling device of rice milling machine - Google Patents

Abstract

PURPOSE:To maintain the load of a rice milling motor in a proper state without discharging unpolished rice by forming a conical part on an unmilled rice feeding shaft and providing a feed controlling ring whose inner face freely inserted into the conical part is formed into a conical face and transferring the feed controlling ring to the axial direction. CONSTITUTION:A polishing chamber 1 communicated with an unmilled rice supply path 13, an unmilled rice feeding shaft 6 which is arranged to the supply path 13 and has a spiral projecting streak 6b in the outer periphery and a rice milling motor 4 for rotating and driving the unmilled rice feeding shaft 6 are provided. A conical part 6a which tapers to the opposite side for the polishing chamber 1 is formed to the feeding shaft 6. A feed controlling ring 9 is provided whose inner face freely inserted into the conical part 6a is formed into a conical face. The feed controlling ring 9 is transferred to the axial direction by a controlling means 17 according to the load current strength of the rice milling motor 4. As a result, the load of the rice milling motor can be maintained in a proper state without discharging unpolished rice and stable polishing can be performed.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is applicable to rice milling machine loads that adjust the load of rice milling motors! P! It concerns the knot device.

[Conventional technology]

In conventional rice milling machines, particularly so-called single-pass rice milling machines suitable for general household use, the rice milling motor is often overloaded due to rice clogging that occurs in the milling chamber.

Therefore, a solenoid pressurizes the pressure plate placed at the white rice discharge port of the whitening room, and when an overcurrent flows through the rice milling motor, the excitation current of the solenoid is cut off and the white rice discharge port of the whitening room is opened. (For example, Japanese Patent Application No. 61-145260). As a result, part of the rice in the whitening chamber is discharged, and the load on the rice polishing motor is reduced to an appropriate range.

FIG. 5 is a sectional view showing the structure of a conventional rice milling machine. In the figure, l is a cylindrical whitening chamber, and brown rice supply channel 13
is subsequently formed. Brown rice supply route 13 from milling room 1
A screw-shaped brown rice feeding shaft 6' is provided over the entire length.
A lower end supply lower a of the brown rice container 7 opens into the brown rice supply path 13. 2 is a solenoid, 3 is a pressure plate, solenoid 2
By applying pressure to the pressure plate 3, pressure is directly applied to the rice in the milling chamber 1. 4 is a rice polishing motor that drives the brown rice feed shaft 6', which includes pulleys 13, 14 and belt 15.
It is connected to the brown rice feed shaft 6' via.

The operation of the rice polishing machine described above will be explained. When normal rice milling is being performed, a preset excitation current is supplied to the solenoid 2, and the pressure plate 3 applies pressure to the rice in the milling chamber 1. The pressure inside the rice milling chamber 1 due to this pressurization causes the rice milling motor 4 to
Since a large load is applied to the motor, a motor load current detection device (
(not shown) constantly detects the load current of the rice milling motor 4. Note that the signal for adjusting the excitation mt flow of the solenoid 2 is not output unless an overload occurs.

If the rice inside the milling chamber l becomes overly compressed, the rice milling motor 4 becomes overloaded, and the load current exceeds the set value.
A motor load current sensing device (not shown) reduces the current in solenoid 2. As a result, the pressing force of the pressure plate 3 is weakened, and the overload condition of the rice milling motor 4 is eliminated. This control process is repeated until a proper load condition is reached to stabilize the rice milling operation.

[Problem to be solved by the invention]

However, in the above-mentioned conventional configuration, when an overload occurs, the pressure of the pressure plate 3 is loosened to discharge the rice in the milling chamber 1 to lower the pressure, and unmilled rice is discharged. There was a problem.

An object of the present invention is to provide a load adjustment device for a rice milling machine that can maintain the load of a rice milling motor in an appropriate state without discharging unmilled rice and can perform stable milling.

[Means to solve the problem]

The load adjustment bag r of the rice milling machine of the present invention has a conical part formed on the brown rice feed shaft that tapers toward the side opposite to the polishing chamber, and a feed adjustment ring with a conical inner surface that loosely fits into this conical part. It is something that Adjustment means is provided for moving the feed adjustment ring in the axial direction in accordance with the magnitude of the load current of the rice milling motor. The brown rice feed shaft is arranged in a brown rice supply path communicating with the milling room, and is rotationally driven by the rice milling motor.

[Effect]

According to the configuration of the present invention, by moving the feed adjustment ring in the axial direction, the interval between the gaps between the inner surface of the feed adjustment ring and the outer surface of the brown rice feed shaft is changed. Therefore, the feed loss of the rice sent to the milling room by the brown rice feed shaft through this gap fluctuates. When the interval between the gaps is increased, rice feeding loss increases, the internal pressure of the milling chamber decreases, and the load on the rice milling motor decreases. In this way, the amount of rice supplied to the milling room is reduced and the pressure inside the milling room is lowered, so unlike when opening the white rice discharge port of the milling room, unmilled rice in the milling room can be discharged. do not have.

〔Example〕

An embodiment of the present invention will be described based on FIGS. 1 to 3. FIG. 1 is a cutaway front view of the main parts of the rice milling machine, FIGS. 2 and 3 are explanatory diagrams of the operation of the main parts, and FIG. 4 is a perspective view of the feed adjustment ring. Components similar to those in the example of FIG. 5 are designated by the same reference numerals, and their explanations will be omitted.

In the figure, 5 is a motor load current detection device that detects the load current of the rice milling motor 4. 12 is a rice polishing container. 6
1 is a brown rice feeding shaft, which has a conical portion 6a that tapers at a constant slope, and has a spirally wound protrusion 6b formed on its outer periphery. The brown rice feed shaft 6 is arranged from the brown rice supply path 13 to the milling room l, and is driven by the M rice motor 4 to pulleys 14,1.
5 and a belt 16. A feed adjustment ring 9 is loosely fitted on the outer periphery of the conical portion 6a of the brown rice feed shaft 6.

As shown in FIG. 4, the fiff ring 9 has a cylindrical shape with a notch 9b on the top surface, and an inner surface 9a.
is formed into a conical shape with a larger diameter on the opening side.

Send! A drive piece 9C having a screw hole 9d is formed in the plate portion of the IN node reshiring 9. The drive piece 9C protrudes from the guide hole 13a on the lower surface of the brown rice supply path 13 (FIG. 2). A feed screw 10 is screwed into the screw hole 9d of the drive piece 9C, and an adjustment motor 11 is connected to the feed screw 10.

The adjustment motor 11 is controlled by the output of the load current detection device 5. The adjustment motor 11. The feed screw 10 and the load current detection device 5 constitute an adjustment means 17.

The operation of the above configuration will be explained. When performing regular rice polishing,
The feed adjustment ring 9 is located on the milling chamber l side as shown in FIG. In this state, the distance A between the outer peripheral surface of the protrusion 6b of the brown rice feed shaft 6 and the inner surface 9a of the feed adjustment ring 9 is narrow, and the brown rice 8 flowing between the brown rice feed shaft 6 and the feed adjustment ring 9 is The rotation of the shaft 6 sends most of it into the milling chamber 1. At this time, the feeding loss of brown rice 8 is considered to be almost zero. However, the inside of the whitening chamber 1 may become clogged with rice depending on not only the proper load state but also the type of rice, the amount of water content, etc.

When the milling room 1 becomes overloaded, the load on the rice milling motor 4 increases, so the motor load current detection device 5 detects this load current and moves the feed adjustment ring 9 to the side opposite to the milling room 1. The adjustment morph 11 is operated so as to When the adjustment motor 11 operates, the feed screw 10 rotates and the feed adjustment ring 9 moves to the position shown in FIG. The width is sufficiently wide compared to the size of .

As a result, as the interval B gradually widens due to the movement of the feed adjustment ring 9, the proportion of the brown rice 8 that once entered between the ridges 6b of the brown rice feeding shaft 6 comes out from between the ridges 6b increases, and the brown rice 8 is fed into the milling chamber l. The amount of brown rice 8 produced decreases. In other words, the feed loss of the brown rice 8 increases as the distance between the brown rice feed shaft 6 and the feed adjustment ring 9 increases.

As a result, the pressure caused by the brown rice 8 fed into the whitening chamber 1 is reduced, and the internal overload state in the whitening chamber 1 is eliminated. Therefore, the load on the rice milling motor 4 becomes appropriate.

According to the load jli1 adjustment device of this rice milling machine, by changing the distance between the brown rice feed shaft 6 and the feed adjustment ring 9 in this way, the feed loss of the brown rice 8 to the milling chamber 1 is adjusted. Even if an overload condition occurs inside the whitening chamber 1, the excessive pressure inside the whitening chamber 1 can be eliminated without reducing the pressing force of the pressure plate 3.

Therefore, stable rice milling operation can be performed without discharging unmilled rice from the milling chamber l.

In the above embodiment, the feed adjustment ring 9 was moved when an overload condition occurred, but even if an overload does not occur, the feed adjustment ring 9 is always moved according to the load condition of the rice milling motor 4. The position of 9 may be adjusted so that the load condition is always optimal.

(Effects of the Invention) The load adjustment device for a rice milling machine of the present invention has a conical portion formed on the brown rice feed shaft, a feed adjustment ring with a conical inner surface that loosely fits into the conical portion, and a feed adjustment ring. By moving the feed adjustment ring in the axial direction, the gap between the inner surface of the feed adjustment ring and the outer surface of the brown rice feed shaft is changed, so the feed loss of the rice fed to the milling room by the brown rice feed shaft is reduced. It is possible to reduce the internal pressure of the milling chamber by increasing the amount of feed and reduce the internal pressure of the milling chamber.Therefore, the motor load can be reduced without opening the milled rice discharge port of the milling chamber, and therefore without discharging unmilled rice. It has the effect of automatically adjusting the motor load to an appropriate state and performing stable polishing.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of the main parts of a rice milling machine equipped with a load adjustment device according to an embodiment of the present invention, Figs. 2 and 3 are explanatory diagrams of the operation of the main parts, and Fig. 4 is the feed adjustment device. A perspective view of the ring, and FIG. 5 is a sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1... Whitening room, 2... Solenoid, 3... Pressure plate, 4... Rice milling motor, 5... Load current detection device, 6
...Brown rice feed shaft, 6a...Conical part, 6b...Protrusion, 9...Feed adjustment ring, lO...Feed screw, 1
1...3J1 joint motor, 17...Adjustment means polished r - one conical tW minute figure figure figure figure procedure nail tr Correct ♂: (Spontaneous) August 4, 1999 Mr. Commissioner of the Japan Patent Office 1゜Incident display 31063 Patent Application No. 289631 3゜Relationship with Hanyu

Claims (1)

[Claims] The above-mentioned rice milling machine includes a milling chamber with a brown rice supply path communicating with the brown rice supply channel, a brown rice feed shaft disposed in the brown rice supply channel and having a spiral protrusion on the outer periphery, and a rice milling motor that rotationally drives the brown rice feed shaft. In the load adjustment device for adjusting the load of the rice milling motor, the brown rice feed shaft is formed with a conical part that tapers toward the side opposite to the polishing chamber, and the feed adjustment ring has an inner surface that is loosely fitted into the conical part and has a conical surface. 1. A load adjustment device for a rice milling machine, comprising: an adjusting means for moving the feed adjustment ring in the axial direction according to the magnitude of the load current of the rice milling motor.