JPH0113902B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a roll for a rice milling machine used in a rice milling machine that removes the husk of grains, particularly the sugar layer of brown rice to produce polished rice.

Conventional technology In general, a rice milling machine consists of a tank for storing input brown rice, a milling section consisting of a perforated cylinder for removing bran following the tank, and a roll for the rice milling machine that rotates inside the perforated cylinder for removing the bran, and a roll for the rice milling machine. It consists of a conduction part that transmits rotational motion, and a discharge part that follows the perforated cylinder for removing rice bran in the milling part.

The rice mill roll used in this rice mill usually has a threaded portion for stirring and transferring the brown rice, and a tip portion having a stirring protrusion.

In such a configuration, the brown rice stored in the tank is introduced into the rear end of the porous cylinder for bran removal in the milling section, and is removed from the bran while being stirred by the threaded part of the rice mill roll due to the rotational movement of the rice mill roll. transferred to the tip of a perforated cylinder.

At the tip of the porous cylinder for bran removal,
A weight resistance that acts to block the discharge port provides resistance to the transfer of brown rice.

For this reason, the rotational movement of the stirring protrusion at the tip of the roll for the rice milling machine causes friction between the rice grains, and the brown rice is polished.

The polished rice is then discharged to the outside through the outlet.

As shown in Fig. 1, the conventional rice mill roll used in such rice milling machines has several screw-shaped stirring protrusions 3 that serve as stirring protrusions with a large pitch, and a continuous ridge on the circumference. a large-diameter tip 1 with several equiangularly arranged pawls 4; and a relatively small-diameter threaded portion 2 with a relatively small pitch threaded protrusion 5;
It is made up of.

Furthermore, a polishing roll having a spring disposed outside the shaft has been proposed in Japanese Utility Model Application Publication No. 55-147828.

Further, a whitening roll for a horizontal grain milling machine in which a screw blade is fixed to the shaft bed of a rotating shaft is known as Japanese Utility Model Publication No. 34-7368.

Problems to be Solved by the Invention However, in the conventional roll for a rice milling machine, the threaded stirring protrusions 3 are cut from a round bar at the end, and several threaded stirring protrusions 3 are cut on the circumference following the threaded stirring protrusions 3. Claw 4
After the tip part 1 is formed by spot welding at equal angles, the tip part 1 is further machined.
is finished, and the threaded part 2 following the tip part 1 is finished by cutting out the threaded protrusion 5 from the round bar by machining, so the material yield does not improve and the processing time of the material increases, so cost savings are achieved. It was difficult to achieve this, and there was a concern that the material would be damaged during processing.

In addition, the one described in Utility Model Application Publication No. 55-147828 is
One end of the spring was fixed to the shaft, and the other end of the spring was a free end that could be expanded and contracted.

Furthermore, what is described in Utility Model Publication No. 34-7368 is
A large number of semicircular screw blades, which are separated as appropriate, are provided in the screw blade part, and a stirring frame with a space provided on the opposite side of the semicircular screw blades is appropriately fixed to the semicircular screw blade part. In addition to interrupting the grain delivery action by the spiral blades,
The grains were agitated and ground by rotating a stirring frame.

It is an object of the present invention to address the above-mentioned problems and to
Instead of cutting from a round bar as in the past, a twisted stirring protrusion is formed at the tip, and a threaded part that continues to the tip is formed without cutting a threaded protrusion from the round bar. Cutting is no longer required, material processing time is significantly reduced,
Improved material yield, reduced manufacturing costs,
Moreover, it is an object of the present invention to provide a method for manufacturing rolls for rice milling machines that can obtain stable quality equivalent to conventional rolls without worrying about damaging the material during processing.

Means for Solving the Problems In the method of manufacturing a roll for a rice milling machine of the present invention, a drawn material having parallel opposed protrusions on the outer peripheral surface is twisted to form a stirring protrusion at the tip, and the stirring protrusion is formed integrally with the tip. It has a structure characterized in that a threaded portion is formed by welding a spiral filament having a smaller pitch than the stirring protrusion to the shaft portion.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In Fig. 2, reference numeral 1 denotes a large-diameter tip portion, and the tip portion 1 is formed with several screw-shaped protrusions 3 that serve as stirring protrusions with extremely large pitches. Several claws 4 are arranged at equal angles on the circumference of the distal end 1 by spot welding.

A shaft portion 6 having a smaller diameter than the diameter of the tip portion 1 is integrally provided at the end of the tip portion 1 on the claw 4 side, and a spiral wire having a pitch smaller than the threaded protrusion 3 is provided on the outer peripheral surface of the shaft portion 6. A thread 2 is formed following the tip 1 by welding the strip 5'.

As shown in FIG.
By twisting a drawn material having two opposed protrusions 3', 3', the screw-shaped stirring protrusion 3 of the tip portion 1 is formed.

The threaded part 2 is made by inserting a cylindrical finished shaft part 6 into a spiral filament 5' formed as shown in FIG. By welding, a threaded portion 2 following the tip portion 1 is formed.

As shown in FIG. 4, the spiral filament 5' is
The inner diameter of the spiral filament 5' is equal to the outer diameter of the shaft portion 6, and the pitch of the spiral filament 5' is smaller than the pitch of the threaded stirring protrusion 3 of the tip portion 1. It is obtained by plastic working a strip into this shape.

Effects of the Invention As described above, according to the method of manufacturing a roll for a rice milling machine of the present invention, a drawn material having parallel opposed protrusions on the outer peripheral surface is twisted to form stirring protrusions at the tip, and By welding spiral filaments with a smaller pitch than the stirring protrusions to the shaft that is integrated with the shaft to form the threaded part, twisted stirring protrusions can be created without cutting from a round bar as in the past. In addition to being able to form a thread at the tip, it is also possible to form a threaded portion following the tip without cutting out a threaded protrusion from the round bar, eliminating the need for cutting the material and reducing the processing time of the material. It is possible to significantly shorten the processing time and improve the material yield, reducing manufacturing costs.Moreover, there is no need to worry about damaging the material during processing, and the same level of stable quality as conventional methods can be obtained. be able to.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional roll for a rice mill, FIG. 2 is a partially cutaway front view of a roll for a rice mill produced according to the present invention, and FIG. 3 is a roll for the same rice mill. A perspective view of the main part showing the tip part before processing, No. 4
The figure is a front view of the spiral filament. DESCRIPTION OF SYMBOLS 1...Tip part, 2...Threaded part, 3...Threaded stirring protrusion, 3'...Opposing protrusion, 4...Claw, 5...Threaded protrusion, 5'...Spiral filament, 6 ...Shaft part.

Claims (1)

[Claims] 1 Twisting a drawn material having parallel opposed protrusions on the outer circumferential surface to form a stirring protrusion at the tip, and welding a spiral filament having a smaller pitch than the stirring protrusion to a shaft integral with the tip. A method of manufacturing a roll for a rice milling machine, characterized in that a threaded portion is formed by rolling the roll.