JPH0227888Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This is an invention of a hulling roll that feeds and dehulls rice between a pair of left and right rubber rolls.

(Prior art) Traditionally, hulling rolls were formed by baking a rubber layer to a thickness of about 35 mm to 40 mm on a cast iron or iron plate drum. Supply paddy to the farmers and remove the rice from the mulch.

(Problem that the invention aims to solve) However, when the rubber layer wears out and reaches a thickness of several millimeters, it loses its elasticity and cannot rub the rice, resulting in broken rice and an increase in the frictional force between the two rolls. So,
This results in drawbacks such as the rubber layer separating from the drum and the horsepower of the motor increasing.

The purpose of this invention is to not only allow rice to be rubbed even when the rubber layer is worn down to a thickness of several millimeters, but also to notify that the rubber layer has been worn.

(Means for Solving the Problem) In the present invention, an annular uneven strip 2 is formed on the circumference of a drum 1 made of iron plate, and the drum 1 is bent into a corrugated cross section. Then, a rubber layer 3 is baked on the outside of the uneven strip 2.

(Function) The iron plate drum 1 in the hulling roll of the present invention is not only extremely strong due to the annular uneven strips 2, but also has an expanded surface area and a wider contact area with the rubber layer 3, so that the drum 1 is baked. The rubber layer 3 is firmly connected to the drum 1.

Moreover, since the drum 1 made of iron plate is bent into a corrugated cross-sectional shape by the annular uneven strips 2, the drum 1 is well flexed in the diametrical direction and does not lose its elasticity even if the rubber layer 2 is worn out.
Furthermore, as the rubber layer 2 wears down, the paddy is pushed by the convex portions of the concavo-convex strips 2, slides on the rubber layer that still has the elasticity of the convex portions, and is dehulled. The strips rub against each other, and the steel drum 1 generates noise.

(Example) To explain the example shown in Figures 1 and 2 of the drawings, reference numeral 1 denotes a drum made of iron plate, which consists of a pair of left and right bottomed cylinders, and the peripheral edge thereof is provided with uneven strips 2 in the circumferential direction. are formed adjacent to each other, and a rubber layer 3 is baked on the outside.

Thus, a bottom surface 6 provided at the inner center of the iron plate drum is fixed to a boss 5 fixed to the rotating shaft 4.

7 is a locking screw.

Further, the uneven strips 2 may be formed in a spiral shape around the circumference of the drum.

(Effects of the invention) The iron plate drum 1 of the present invention has annular concavo-convex strips 2 formed adjacent to it on its circumference and is bent into a waveform in cross section. When transporting 1, do not unnecessarily disfigure it even if it is subjected to impact. Besides, drum 1
Since the surface area of the rubber layer 3 is increased and the surface area of the rubber layer 3 is increased, the rubber layer 3 does not separate from the drum 1 even if the frictional force of the rubber layer 3 increases.

In addition, the iron plate drum 1 has an adjacent annular uneven strip 2.
The elasticity of the rubber layer 3 which bends in the diametrical direction and wears out is well compensated for. Therefore, even if the rubber layer 3 is worn out and the frictional force between the opposing hulling rolls increases, it is possible to prevent the rice from breaking and the horsepower of the motor from increasing.

Moreover, when the rubber layer 3 of the hulling roll according to the present invention is worn down to several millimeters as the hulling work progresses, the uneven strips 2
The rice pressed against the thin, hard rubber layer that has lost its elasticity at the tip of the annular convex strip slides onto the thick, soft rubber layer that still has elasticity in the adjacent annular concave strip, and is released by the rubber layer inside the concave strip. Moreover, the tip of the worn annular ridge on the rubber layer of one hulling roll comes into strong contact with the tip of the worn annular ridge on the rubber layer of the other hulling roll, which not only causes smoke to be generated. Since a continuous noise is emitted, this has the effect that the operator can know when the hulling roll has worn out.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of an embodiment of the present invention;
The figure is a perspective view of the iron plate drum shown in FIG. 1 is a drum, 2 is an uneven strip, and 3 is a rubber layer.

Claims (1)

[Scope of utility model registration request] A rice hulling roll made of an iron plate drum with annular concave and convex strips adjacent to the circumference and bent to have a corrugated cross section, and a rubber layer baked on the outside of the concave and convex strips.