JP2000051716A - Polishing roll of one-pass rice-polishing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent grains from being stuck in a polishing chamber and also to reduce broken rice in a polishing roll of an one-pass rice polishing machine in which plural projecting baffles are arranged on the outer peripheral surface of a polishing part by forming pressure vibration grooves extending along the projecting baffles on the outer peripheral surface between the projecting baffles. SOLUTION: Raw material grains G that have fallen into a fall cylinder 11 from a raw material tank 10 are sent to a polishing chamber 14 while pressurized by a grain sending screw of a grain sending part 25 and are moved while polishing pressure is applied to them in a polishing part 21 of a polishing roll A. At this time, the grains G passing through the polishing part 21 are moved while given vibration by pressure vibration grooves 30a, 30b. When the grains G abutted on an outer peripheral surface 21s of the polishing roll A is pressurized by a groove boundary part, they receive a strong pressing force, but when they pass the groove boundary part and are positioned in grooves 30a, they receive a small pressing force. The grains G thus are pressed by the projecting baffles 21a, 21b while receiving uneven pressure, and after that, they fall to a polished rice discharge port 41 from an outlet 39 and are housed in a polished rice vessel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a milling roll for a single-pass milling machine.

[0002]

2. Description of the Related Art In a single-pass mill, a milling room is reduced in size for the required power, and grains are filled in the small milling room to form a milling roll and a milling room. The main feature of this method is the removal of grain bran mainly by the functional frictional force with the outer wall wire mesh.

[0003] The rice mill controls the pressure of the resistance disk at the discharge port of the milling chamber to control the degree of filling and the passage time in the milling chamber to minimize the grinding of rice and to optimize the whiteness. Then, the best white rice is obtained.

The conventional whitening roll applies an appropriate frictional force to the grains in the whitening chamber, and is applied to the outer peripheral surface of the whitening portion of the cylindrical roll body from the front end side to the rear end side of the whitening portion. Two extending convex resistors are provided at intervals in the circumferential direction.

[0005]

In the conventional whitening roll, the grains supplied into the whitening chamber receive a high whitening force as the roll body rotates, and come into contact with the convex resistor and suddenly push a large pressing force. Receive pressure. As a result, broken rice is generated, and grains are fixed in the refining room, and the operation becomes unstable. In addition, since a large power is required, the driving source is also large.

[0006] In view of the above circumstances, an object of the present invention is to prevent grain from sticking in a refining room and reduce the amount of broken rice. Another purpose is to make small powers suffice.

[0007]

According to the present invention, a plurality of convex resistors extending from one end to the other end of the whitening portion are arranged on the outer peripheral surface of the whitening portion at intervals in the circumferential direction. A polishing roll for a single-pass milling machine provided, wherein pressure vibration grooves extending along the convex resistors are formed on the outer peripheral surface between the convex resistors.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventor has conducted various studies and conducted various experiments in order to solve the above-described problems. It has been noticed that a pressure oscillating groove may be provided to give a peeling action to the filled grain. This groove is formed on the outer peripheral surface of the whitening portion of the whitening roll so as to extend along the convex resistor, and further promotes the flow of the grain stream and further assists in the stripping of the dust from the full grain stream. is there.

Since the pressure vibration groove extends along the convex resistor, if the convex resistor is formed in a twisted shape, the pressure vibration groove becomes a twisted groove. When it is parallel to the axis, it becomes an axial groove.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. The raw material tank 10 communicates with the polishing chamber 14 via the drop cylinder 11. The operating lever 1 is attached to the drop cylinder 11.
A shutter 15 with 3 is provided, and this shutter 15 opens and closes the drop port 17 by sliding the lever 13 in the direction of arrow A13.

An adjusting plate 18 for adjusting the flow of the raw material is provided below the shutter 15. The periphery of the refining chamber 14 is surrounded by a bran-removing wire netting 19, and a refining roll A is inserted inside thereof. This whitening roll A is used for whitening part 2
1 and a grain feeding unit 25.

Outer peripheral surface 21s of whitening section 21 of whitening roll A
, A front-stage convex resistor 21a and a rear-stage convex resistor 21b are provided so as to sandwich the resistor lacking portion 22 therebetween. The front-stage convex resistor 21a is a quadrangular prism-shaped body formed in parallel with the axis C, and is provided two axially symmetrically.

The outer peripheral surface 21 between the front-stage convex resistors 21a
s is provided with a plurality of grooves extending along the resistor 21a, that is, pressure vibration grooves 30a.

The pressure vibration groove 30a is formed parallel to the axis C, but its depth, width, number and the like are appropriately determined as needed. Due to the presence of the groove 30a, the front-stage convex resistor 2
The vertical cross section of the whitening portion 21 in the portion where 1a is disposed, that is, the cross section in the direction perpendicular to the axis C has a polygonal shape, for example, a decagonal shape.

The rear-stage convex resistor 21b is formed in a torsion shape, and is arranged two at a distance in the circumferential direction. The resistor 21b is formed, for example, in a rectangular cross section, and has a length longer than that of the front-stage convex resistor 21a, and extends from the rear end 22n of the resistor lacking portion 22 to the front end p of the polishing roll A.
It is growing up.

The two rear-stage convex resistors 21b are formed in a reverse screw shape, and the grain G transported to the leading end p side by the rotation of the refining roll A is fed into the refining chamber 14 while being sent back. Stays and applies whitening power for a long time.

The outer peripheral surface 21s between the post-stage convex resistors 21b
Are provided with a plurality of grooves extending along the resistor 21b, that is, pressure vibration grooves 30b.

The groove 30b is formed in a twisted shape, but its depth, width, number and the like are appropriately determined as necessary. Due to the presence of the groove 30b, a vertical cross section of the polishing portion 21 where the rear-stage convex resistor 21b is provided, that is, the axis C
Has a polygonal shape, for example, a decagonal shape.

On the outer peripheral surface of the grain feeding section 25 of the whitening roll A,
A feeding screw 25A is provided. In addition, since the resistor lacking part 22 has neither a convex resistor nor a pressure vibration groove, a vertical section, that is, a section in a direction perpendicular to the axis is circular.

At the outlet 39 of the whitening chamber 14, a resistance device 40 for adjusting the whitening pressure is provided. 41 is a white rice outlet.

Next, the operation of this embodiment will be described. When the drive motor 45 is started, the suction blower 4
6 and the drive shaft 43 rotate. After adjusting the position of the adjusting plate 18, when the operation lever 13 is pulled and the shutter 15 is opened by a predetermined amount, the raw material grains G in the raw material tank 10 fall in the falling cylinder 11 toward the refining chamber 14.

The raw material grains G dropped into the milling chamber 14 are pressed by the grain feeding screw 25A of the grain feeding section 25 while being pressed.
And moves toward the outlet 39 while applying the whitening pressure by the whitening section 21 of the whitening roll A.

At this time, the grain G passing through the refining section 21 moves while being vibrated by the pressure vibration grooves 30a and 30b, so that the pressure in the refining chamber 14 is uneven. That is,
The grain G abutting on the outer peripheral surface 21s of the whitening roll A, when the whitening roll A rotates and is pressed by the groove boundary 21k, the gap between the groove boundary 21k and the bran-removing wire mesh 19 becomes narrow. Although a strong pressing force is received, when the groove boundary 21k passes by and is located in the grooves 30a, 30b, the distance becomes large, so that a small pressing force is received. Therefore, the pressure in the refining chamber 14 is always uneven due to the rotation of the refining roll A, and the grain G is easily moved.

Further, since the grain G is pressed by the convex resistors 30a and 30b while receiving uneven pressure as described above, a large force is not suddenly applied to the grain G. Therefore, there is little possibility that the rice will be broken, and the operation can be continued with small power.

Then, the raw material grains G overcome the resistance of the resistance device 40, open the outlet 39, fall into the white rice discharge port 41, and are stored in a rice mill (not shown).

The rice bran generated in the refining chamber 14 is the bran-removing wire mesh 1
9 and is transported by a suction blower 46 to a rice bran bag (not shown).

A second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment (FIGS. 1 to 5) is as follows. (1) There is no resistor missing portion in the whitening portion of the whitening roll, and the front-stage convex resistor 21a and the rear-stage convex resistor 21b are continuous. (2) The pressure vibration groove 30a and the pressure vibration groove 30b are continuous.

A third embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment (FIGS. 1 to 6) is that not only the front-stage convex resistor 31a but also the rear-stage convex resistor 31b are formed parallel to the axis. Instead, the pressure vibration groove 32b is also formed parallel to the axis.

[0029]

As described above, the present invention has the following remarkable effects. (1) Compared with a whitening roll of a conventional single-pass rice mill, a peeling action on grains works more effectively. Therefore, the required power can be reduced and the whiteness of the white rice can be improved. (2) By making the resistance pressure of the discharge port of the whitening chamber weaker than the conventional example,
Since the operation is possible, it is possible to reduce the generation of broken rice by 1 to 3%, and it is possible to further reduce the temperature of white rice by 2 to 3 ° C. For this reason, it is possible to whiten good-tasting white rice with high quality with little broken rice and low rising temperature of white rice. (3) Since artificial pressure (resistance) from the outside can be reduced, it is possible to prevent accidents due to sticking in the whitening room of the single-pass rice milling machine generated from operation, and also not to be greatly affected by the level of moisture in the grain, and to mill rice. Rice milling is now possible even for inexperienced workers.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of the polishing roll of FIG.

FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is an enlarged perspective view of a milling roll.

FIG. 6 is a view showing a part of an enlarged cross section of the refining chamber, and is a diagram showing a relationship between the refining roll and a pressure vibration groove.

FIG. 7 is a perspective view showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a third embodiment of the present invention.

[Description of Signs] 21 Refining part 21a Front-stage convex resistor 21b Rear-stage convex resistor 22 Resistor-missing part 30a Pressure vibration groove 30b Pressure vibration groove 31 Convex resistor 32 Pressure vibration groove

Claims (6)

[Claims] 1. A single-pass milling machine in which a plurality of convex resistors extending from one end to the other end of the polishing section are arranged on the outer peripheral surface of the polishing section at intervals in the circumferential direction. A pressure vibration groove extending along the convex resistor is formed on an outer peripheral surface between the convex resistors, the polishing roll for a single-pass milling machine. 2. The single pass rice milling machine according to claim 1, wherein said convex resistor is a twisted convex resistor, and said pressure vibration groove is a twisted groove. Whitening roll. 3. The single pass type according to claim 1, wherein the convex resistor is a convex resistor parallel to an axis, and the pressure vibration groove is a groove parallel to the axis. Milling roll of rice mill. 4. A convex resistor parallel to an axis formed on one end of a whitening portion, said convex resistor being continuous with said convex resistor and directed toward the other end of said whitening portion. 2. A milling roll for a single pass rice mill according to claim 1, wherein said milling roll comprises a twisted convex resistor extending. 5. The method according to claim 1, wherein the convex resistor is connected to a convex resistor parallel to an axis formed at one end of the whitening portion, and is continuous with the convex resistor and a resistor lacking portion. 2. A milling roll for a single pass rice mill according to claim 1, further comprising: a twisted convex resistor extending toward the other end of the portion. 6. The pressure vibration groove is a groove parallel to the axis between the convex resistors parallel to the axis, and a twist groove between the twisted convex resistors. The whitening roll of the single pass rice mill according to claim 4 or 5.