JP2677463B2 - Rice milling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice mill for processing brown rice into white rice.

[0002]

2. Description of the Related Art A conventional rice milling machine generally has a structure as shown in FIG. In FIG.
Inside, a feed roll 42 and a refining roll 43 are disposed, and at the outlet 44 of the refining cylinder 41, a regulating plate 45 for regulating the cross-sectional area of the passage is provided. It is configured to keep the polishing accuracy constant.

When the feed roll 42 and the whitening roll 43 are driven to rotate by a motor 47 and brown rice is put into the whitening cylinder 41 from above,
The brown rice is pushed into the regulating plate 45 by the feed roll 42,
A milling roll that is rotationally driven with the net 48 inside the milling cylinder 41
The white rice that has been polished and milled between 43 is discharged from the exit 44. Here, when the urging force of the spring 46 is increased, the internal pressure of the whitening cylinder 41 increases and the grinding accuracy increases, and when the urging force is reduced, the internal pressure decreases and the polishing accuracy decreases.

However, in the above configuration, in the initial stage of operation, when the pressure in the whitening cylinder 41 becomes high, the regulating plate 45 is pushed immediately to open the outlet 44, so that the brown rice that has been initially charged is completely removed. There was a problem that it was paid out before the whitening, and it was necessary to perform the whitening again.

Therefore, as shown in FIG. 7, an opening regulating member 53 is provided which fits on the inner periphery of a white rice outlet forming member 52 disposed at the outlet end of the polishing cylinder 51, and the outer periphery thereof is arranged in the axial direction. Formed on a cylindrical outer peripheral surface 54 having an appropriate width, and at the beginning of operation or at the end of refining, supply of brown rice is stopped in a state where the space between the net 56 of the refining cylinder 51 and the refining roll 55 is filled with brown rice for a predetermined time. By rotating the whitening roll 55, even if the opening degree regulating member 53 is slightly displaced in the axial direction by the pressure in the whitening cylinder 51 during its operation, it is possible to reliably prevent the unwhitened rice from leaking out. Thus, there has been proposed a rice mill configured to discharge completely milled white rice even at the beginning of operation or at the end of milling. In FIG. 7, reference numeral 59 denotes an operation shaft of the opening degree regulating member 53, which is urged in a direction of closing the white rice outlet as shown by a white arrow, and the opening degree regulating member 53 resists this urging force. By moving downward in the figure, milled rice is discharged as shown by the broken line arrow.

[0006]

During operation for a long period of time, the fitting recess 57 at one end of the whitening roll 55 and the inner peripheral surface of the fitting part 58 fitted in the fitting recess 57 are formed. The opening control member 53 cannot be smoothly operated due to the clogging of the bran between them, or the opening control member 53 has an initial position due to the accumulation of bran between the bottom surface of the fitting recess 57 and the end surface of the fitting portion 58. However, there is a problem that unpolished rice may leak during the whitening operation at the beginning of operation or at the end of whitening. Ma
In addition, the opening control member responds to the internal pressure of the white polishing
A moving mechanical structure is desired.

It is an object of the present invention to provide a rice milling machine which can ensure a smooth operation of the opening degree regulating member 53 and can obtain completely polished white rice even at the beginning of operation and at the end of polishing.

The rice mill according to claim 1 is arranged along the axial direction.
At one end of the polishing tube where a polishing roll is installed
A white rice outlet forming member with a
Close to the end on the rice exit side and coaxial with the whitening roll
And is movable in the axial direction of the whitening tube part
Has an appropriate width in the axial direction of the
The opening regulation biased to block the opening of the white rice outlet.
A control member is provided, and the inside of the whitening tube portion of the opening control member is provided.
The receiving surface of the first receiving roller located outside the outer diameter of the whitening roll.
Surface and the first receiving surface, the other end is the rotation axis of the whitening roll
It is composed of the second receiving surface close to the heart, and the opening control member
The entire concave portion formed by moving in the axial direction of the white tubular portion,
Make sure to open it toward the white rice flow path inside the white polishing tube.
The first receiving surface and the second receiving surface are directed toward the outer circumference of the opening regulating member.
It is characterized in that it is formed with a wide hem. Claim 2
In the rice milling machine according to claim 1, the opening regulating member is
It is characterized in that it is externally fitted to the small diameter cylinder part at the lower end of the base.
You.

[0009]

According to this structure, since the opening regulating member is moved in the axial direction of the polishing cylinder to form the entire concave portion, which is open toward the white rice flow path inside the polishing cylinder, the polishing is performed. The internal pressure of the tubular portion acts on this concave portion, and the bran attempting to adhere is scraped off by the internal pressure of the white polishing tubular portion and does not grow. Acted on the recess
The internal pressure of the white polishing cylinder portion acts on the second receiving surface of the opening regulating member.
Component force in the direction of pushing down the opening regulating member is generated,
The sensitivity is higher than that of the conventional device having only the receiving surface.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 3, reference numeral 1 denotes a main body casing, which is formed by fitting and connecting an upper casing 2, a whitening cylinder 3, an intermediate casing 4, and a lower bearing casing 5 in order from the upper part to the lower part. They are configured so that their axes match. A screw feeder 6 for supplying brown rice is connected to an opening formed on one upper side of the upper casing 2.
7 is a hopper for feeding brown rice, and 8 is a drive motor.

Reference numeral 9 denotes a rotary shaft composed of a hollow shaft disposed at the center of the upper casing 2, the whitening cylinder 3, and the intermediate casing 4 at the center thereof.
The feed roll 10 is fitted and fitted almost correspondingly to the inside, and the refinement roll 11 is fitted and fitted substantially corresponding to the refined cylinder portion 3. The feed roll 10 and the whitening roll 11 are connected to each other by a connecting pin 12, and a position near the lower end of the whitening roll 11 is circumferentially engaged with the rotating shaft 9 by a key 13.

A small-diameter cylindrical portion 14 is formed at the lower end of the whitening roll 11 as shown in FIG.
An opening degree regulating member 15 is provided so as to be slidable up and down in a state of being fitted onto the outside. The outer peripheral surface of the opening regulating member 15 is formed into a cylindrical surface having an appropriate width in the vertical direction.
The entire concave portion 16 formed by moving in the direction of the axis of the whitening cylindrical portion 3 is opened toward the whitening cylindrical portion 3. Specifically
Is the receiving surface 15A of the opening regulating member 15 of the outer diameter of the whitening roll.
The first receiving surface 15B located outside and the first receiving surface 15B
Then, the other end of the second roll, which is close to the rotation axis of the whitening roll, is
The first receiving surface 15B and the second receiving surface 15B.
The surface 15C is formed so as to spread toward the outer periphery of the opening degree regulation member 15.
Has been established.

A net 17 is arranged in the whitening tube portion 3 at an appropriate distance from the outer circumference of the whitening roll 11, and the whitening tube portion 3 is provided.
An outlet 18 for bran generated during rice polishing is opened on one side of the outer periphery of the lower part of the rice. Further, a white rice outlet forming member 19 is disposed between the lower end of the whitening cylinder 3 and the upper end of the intermediate casing 4. The inner periphery of the white rice outlet forming member 19 is formed as a sharp edge, and is fitted to the outer peripheral surface of the opening regulating member 15 having a suitable width in the vertical direction.

A white rice discharge port 20 is formed on one side of the upper end portion of the intermediate casing 4, and a chute 21 is attached thereto.
Further, a receiving flange 22 for receiving the white rice dropped from the white rice outlet forming member 19 and guiding the white rice to the chute 21 is protrudingly provided on the rotating shaft 9. A support shaft 23 rotatably supported by a pair of upper and lower bearings 24 is provided at an intermediate portion of the intermediate casing 4, and a lower end portion of the rotary shaft 9 is fitted and fixed. Intermediate casing 4
A torque sensor 25 is disposed in the lower part of the
a is slidably fitted to the support shaft 23 only in the axial direction.

A drive shaft 27 rotatably supported by a pair of upper and lower bearings 26 is arranged in the lower bearing casing 5, and the other end shaft 25b of the torque sensor 25 is slidable only in the axial direction on its upper end. A drive pulley 28 is fixed to the lower end of a drive shaft 27 that is movably fitted and projects downward. The drive pulley 28 is configured to be rotatable by a motor (not shown) via a drive belt.

An opening adjusting shaft 29 is inserted into the hollow rotating shaft 9, and a lower end portion of the opening adjusting shaft 29 is connected by a connecting member 30 penetrating an elongated hole 31 formed in the rotating shaft 9. ing.
The upper end of the opening adjustment shaft 29 is rotatably engaged with the upper surface of an engaging member 34 supported on a lifting member 32 via a spring 33. The elevating member 32 is configured to be able to move up and down by elevating means 35, and the elevating means 35 is driven and controlled by control means 36 to which an output signal from the torque sensor 25 is input.

As shown in FIG. 4, the elevating means 35 is composed of a feed screw shaft 38 which is rotationally driven by a drive motor 37, a movable nut body 39 screwed to the feed screw shaft 38, and a guide rod 40 thereof. The movable nut body 39 is connected to the elevating member 32.

According to the above construction, the brown rice is put into the upper casing 2 from the hopper 7 by the screw feeder 6 while the rotary shaft 9 is rotationally driven by the drive pulley 28 via the drive shaft 27 and the torque sensor 25. Then, the brown rice is pushed into the white polishing tube portion 3 by the feed roll 10 and whitening processing is performed between the rotating whitening roll 11 and the net 17. In addition, the bran separated by the whitening treatment passes through the rotation shaft 9 and the through holes (not shown) formed in the whitening roll 11 through the net 17 through the net 17. The bran is discharged to the outside together with the airflow flowing toward the outlet 18. The polished white rice resists the urging force of the spring 33 due to the pressure of the brown rice fed into the space between the net 17 of the whitening cylinder 3 and the whitening roll 11 as shown in FIG.
As shown in (1), it is sequentially discharged from an annular passage formed between the outer periphery of the opening degree regulating member 15 depressed and the white rice outlet forming member 19, and is discharged from the white rice discharge port 20 through the chute 21 to the outside.

When the accuracy of the grinding becomes higher than the set value, the load torque acting on the whitening roll 11 becomes large and the output signal from the torque sensor 25 becomes excessively larger than the set value. In response to this command, the lifting / lowering member 32 is lowered by the lifting / lowering means 35, the upward biasing force of the opening adjustment shaft 29 by the spring 33 is reduced, and the opening regulating member 15 is lowered, the opening is increased and the accuracy is increased. Adjusted low. Conversely, when the polishing accuracy is low, the output signal from the torque sensor 25 is too small, so the lifting member 32 is raised by the lifting means 35, the opening restriction member 15 is raised, and the opening is reduced. It becomes smaller and the grinding accuracy is adjusted higher. Thus, the milling accuracy is automatically controlled to the set one.

When the operation is started, the supply of brown rice is stopped when the upper casing 2 and the whitening tube portion 3 are filled with brown rice, and the rotary shaft 9 is rotationally driven for a predetermined time in this state to perform the whitening treatment. By doing so, since the outer peripheral surface of the opening degree regulation member 15 has a predetermined width in the vertical direction, unpolished rice does not flow out during the whitening treatment, and white rice is discharged at the beginning of operation or at the end of whitening. Completely milled white rice is discharged without returning the unpolished rice discharged from the outlet 20 to re-milling and controlling the whitening roll 11 and the opening control member 15 in a complicated manner. To be done. The state where rice is just filled can be detected by an output signal from the torque sensor 25.

Further, the opening regulating member 15 is formed by being fitted to the small diameter cylindrical portion 14 at the lower end of the whitening roll 11 and the opening regulating member 15 is moved in the axial direction of the whitening cylindrical portion 3. Since the entire recessed portion 16 is opened toward the white rice flow path C inside the whitening tube portion 3, the internal pressure of the whitening tube portion 3 is
The bran, which acts on 16 and tries to adhere, is scraped off by the internal pressure of the white polishing tube portion 3 and does not grow. Further, the inner pressure of the whitening tube portion 3 is hard to act on the outer peripheral surface of the small-diameter tube portion 14 of the whitening roll 11, but the bran that adheres to this portion and grows is regulated to move up and down with rice polishing operation. It is scraped off by the edge A on the inner circumference of the member 15.

As described above, the bran is not caught between the bottom surface of the whitening roll 11 and the upper end of the opening regulating member 15, the operation of the opening regulating member 15 is smooth, and the initial position is the lower position. It is possible to reliably prevent the unpolished rice from overflowing during the above operation at the start of operation or the end of whitening, and there will be no instability. Also open
The receiving surface 15A of the degree regulating member 15 is not only the first receiving surface 15B but also the first receiving surface 15B.
Since the second receiving surface 15C is provided, it acts on the concave portion 16.
The internal pressure of the white polishing cylinder is applied to the second receiving surface 15C of the opening control member.
Is used to generate a component force in the direction that pushes down the opening regulation member 15.
However, the sensitivity is higher than that of the conventional device with only the first receiving surface 15B.
You.

In the above embodiment, the opening regulating member 15 was fitted onto the small-diameter cylindrical portion 14 of the whitening roll 11, but this is as shown in FIG. The opening regulating member 15 is fitted onto the rotary shaft 9 and moved in the axial direction of the whitening tube portion 3 without providing the above, and the entire recess 16 is provided inside the whitening tube portion 3. It can also be opened toward the white rice flow path C.

[0024]

Rice milling machine of the present invention as described above, according to the present invention is, Jikushinkata
At one end of the whitening cylinder part where whitening rolls are arranged along the direction,
White rice outlet forming member (1) in which the white rice outlet (19a) is formed
9) is provided, and it is close to the end of the whitening roll on the side of the white rice exit.
It is arranged coaxially with the whitening roll, and the shaft of the whitening cylinder
It is movable in the core direction and has an appropriate width in the direction of the axis of the polishing cylinder.
Installed at the above-mentioned white rice outlet (19a), the white rice outlet
(19a) opening regulation biased in a direction to close the opening
A member (15) is provided, and the opening control member (15) has the above-mentioned precision.
Set the receiving surface (15A) on the inner side of the white tube to the outside diameter of the whitening roll.
The first receiving surface (15B) located outside the
After the surface (15B), the other end is close to the rotation axis of the whitening roll.
A second receiving surface (15C) in contact with the opening control member
Is the entire concave portion formed by moving in the axial direction of the white polishing cylinder
So that it is opened toward the white rice flow path inside the white polishing tube.
Open the first receiving surface (15B) and the second receiving surface (15C).
Formed to widen the hem toward the outer periphery of the degree regulating member (15)
Because he was, the internal pressure of the milling tube portion acts on this recess, bran tried adhesion can be scraped off by the internal pressure of the milling tube portion, bran between the upper end of the bottom surface and the opening regulating member for milling roll There is no bite, the operation of the opening control material is smooth,
It is possible to reliably prevent the unpolished rice from overflowing during the operation at the start of operation or at the end of polishing after the initial position is displaced downward, and you can expect stable rice processing for a long period of time. It is a thing. Also acted on the recess
The internal pressure of the white polishing cylinder portion acts on the second receiving surface of the opening regulating member.
Component force in the direction of pushing down the opening regulating member is generated,
The sensitivity is higher than that of the conventional device with only the receiving surface of
You.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a main part showing a structure of a whitening roll and an opening degree regulating member of a rice mill of the present invention.

FIG. 2 is a longitudinal sectional view of the apparatus during rice polishing.

FIG. 3 is a vertical sectional front view of a rice milling machine according to an embodiment of the present invention.

FIG. 4 is a side view of a drive mechanism of an opening degree regulating member.

FIG. 5 is a vertical cross-sectional view of a main part showing the structure of another embodiment.

FIG. 6 is a schematic configuration diagram of a conventional example.

FIG. 7 is a vertical sectional front view of a main part of another conventional example.

[Explanation of symbols]

 3 Whitening tube part 11 Whitening roll 14 Small diameter tube part at the bottom of whitening roll 15 Opening control member 16 Recess 19 White rice outlet forming member A Inner edge of opening control member C White rice flow path inside whitening tube part

Claims (2)

(57) [Claims] 1. A white rice outlet (19a) formed at one end of a whitening tube portion having a whitening roll arranged along the axial direction.
A rice outlet forming member (19) is provided so as to be close to the white rice outlet side end of the whitening roll and be polished
It is arranged coaxially with the roll and moves in the axial direction of the polishing cylinder.
The white rice that has a proper width in the axial direction of the white polishing tube
The white rice outlet (19a) is opened at the outlet (19a).
The opening control member (15) that is biased in the direction
Provided, the receiving surface of the opening regulating member (15) on the inner side of the above-mentioned whitening cylindrical portion
(15A) is the first located outside the outer diameter of the whitening roll.
Following the receiving surface (15B) of this and this first receiving surface (15B)
The other end of the second receiving surface (1
5C), the opening degree regulating member is formed by moving in the axial direction of the whitening cylinder portion.
Open the entire concave part facing the white rice flow path inside the white polishing tube.
So that the first receiving surface (15B) and the second receiving surface (1
5C) is widened toward the outer circumference of the opening degree regulation member (15).
A rice milling machine that has been formed . 2. An opening control member is provided at the lower end of the whitening roll.
The rice milling machine according to claim 1, wherein the rice milling machine is fitted onto the small diameter tubular portion (14) .