JP2899442B2 - Steamed rice loosening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steamed rice loosening apparatus, and more particularly, to a steamed rice loosening apparatus improved so that grain breakage of steamed rice can be suppressed and broken down into single grains. .

[0002]

2. Description of the Related Art Conventionally, in the field of food processing,
For example, commercially available glutinous rice is steamed to be gelatinized and then dried to produce alpha rice. In the above-mentioned production of α rice, a steamed rice loosening operation is performed in a drying step, and for such a loosening operation, for example, a steamed rice loosening device using a pin roller is used.

[0003]

However, it is difficult to completely disintegrate the steamed rice with a pin roller using a steamed rice disintegrating apparatus. Further, since the pin roller is made of steel, the steamed rice cannot be disintegrated. There is also a problem that the grains are broken due to cracking or breaking, resulting in a low product yield. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an improved steamed rice loosening apparatus that can suppress grain breakage of steamed rice and can be loosened in units of one grain.

[0004]

That is, the steamed rice loosening apparatus of the present invention mainly comprises a mesh conveyor and a loosening roller which rotates in the same direction as the moving direction of the mesh conveyor, and the loosening roller is provided on the surface of the support roller. It has a plurality of rubber hollow projections formed in the same axial direction and in the same arc over the entire circumference of the support roller, and the surface of each hollow projection has a number of Is provided.

[0005]

A plurality of rubber hollow projections are softly and planarly pressed against the cooked rice to crush the chunks of the cooked rice. During the breaking, the steamed rice is loosened into grains in cooperation with the planar pressing of the rubber hollow projections.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an example of a loosening roller used in the steamed rice loosening apparatus of the present invention. FIG. 1 (a) is a front view, FIG. 1 (b) is a sectional view, and FIG. FIG. 3 is an overall explanatory view showing an example of the steamed rice loosening device of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing of the steamed rice loosening equipment which incorporated the steamed rice loosening apparatus of this invention into the drying process of steamed rice.

First, a steamed rice loosening apparatus according to the present invention will be described with reference to FIGS. The steamed rice loosening device (10) of the present invention mainly comprises a mesh conveyor (1) and a loosening roller (2).

The mesh conveyor (1) is composed of a net-like or porous endless belt, and the degree of opening is, for example, usually 10 to 20 in the case of a mesh belt.
The range of the mesh.

The loosening roller (2) has a plurality of rubber hollow projections (4) formed in the same arc on the surface of a supporting roller (3) made of a rigid material such as metal or plastic material. The arc is formed in the same axial direction as the support roller (3) and around the entire periphery of the support roller (3). A plurality of grooves (5) are provided in the axial direction on the surface of the rubber hollow projection (4).

Usually, a plurality of rubber hollow projections (4)
The support roller (3) is formed integrally around the hollow support (6), and the loosening roller (2) is formed by inserting the support roller (3) into the hollow support (6).

The number of the rubber hollow projections (4) varies depending on the outer diameter of the support roller (3). When the number is about 50 mm, the number is usually about 4 to 16, and about 6 to 12. Is preferred. And the thickness of the projection is 1 to 10 m
m, the height of the projection (the distance from the surface of the hollow support (6) to the surface of the projection) is preferably about 0.5 to 3 cm. Further, the depth of the groove (5) is in the range of 0.3 to 1.0 mm,
When the number of the rubber hollow projections (4) is eight, the number is suitably 5 to 10, and when the number is other, the intervals between the grooves (5) are approximately the same based on the above. Is determined as appropriate so that

As the rubber material constituting the rubber hollow projections (4), silicon rubber, fluorine rubber and the like are particularly recommended from the viewpoint of safety and the like.

The loosening roller (2) is disposed to face the mesh conveyor (1), and is rotated in the same direction as the moving direction. In a preferred embodiment, four loosening rollers (2) are used with different gaps from the mesh belt conveyor (1).

The loosening roller (2a) in the first stage (on the side where steamed rice is charged) is +5 to +3 mm with respect to the mesh conveyor (1), and the loosening roller (2b) in the second stage is +5 mm.
3 to +1 mm, the third stage loosening roller (2c) is 0 to-
Most preferably, the loosening roller (2d) of 1 mm and the fourth stage is 0 to -1 mm. Further, the peripheral speed of each loosening roller is preferably set to be 2 to 3.5 times the traveling speed of the mesh conveyor.

In the preferred embodiment described above, the steamed rice is roughly loosened by the loosening rollers (2a) and (2b) of the first and second stages, and then the third and fourth stages are loosened. In the loosening rollers (2c) and (2d), they are almost completely loosened in units of one grain.

Next, a steamed rice loosening apparatus in which the steamed rice loosening apparatus of the present invention is incorporated in a step of drying steamed rice will be described with reference to FIG. The steamed rice loosening device (1) of the present invention
0) is generally used in the step of drying steamed rice, similarly to a conventional steamed rice loosening apparatus using a pin roller.

In the drying step of the steamed rice, a ventilation band type dryer (20) is generally used, and the mesh conveyor (1) of the steamed rice loosening apparatus of the present invention incorporated in the ventilation band type dryer includes: Functions as a conveyance path for steamed rice. And it is preferable that the unraveling treatment of the steamed rice is performed as follows using the steamed rice unraveling apparatus of the present invention.

That is, when the steamed rice is sufficiently dried, each grain is firmly solidified and it is difficult to loosen the steamed rice. Therefore, as described below, it is preferable to first perform a loosening treatment while preliminarily drying the steamed rice to a predetermined moisture, and then perform a post-drying.

Steamed rice (32-33% moisture) discharged from a steamed rice machine (not shown) is fed by a conveyor (30) to a mesh conveyor (1) in a ventilation band type dryer (20).
Transported up. On the other hand, the drying air heated by the heat exchanger (40) such as a plate fan heater is supplied from the upper part of the band type dryer (20), and the steamed rice and the cross flow on the mesh conveyor (1) are supplied. And is exhausted from below. The steamed rice on the mesh conveyor (1) is sufficiently loosened by the steamed rice loosening device (10), and is dried to a water content of about 28 to 29% and discharged.

The drying conditions are as follows: temperature of drying air: 5
5 to 60 ° C., surface wind speed: 0.4 to 0.8 m / s, laminated thickness of steamed rice: 15 to 20 mm, residence time of steamed rice: preferably 2 to 4 minutes.

The steamed rice pre-dried by the ventilation band type dryer (20) is sufficiently dried by the second ventilation band type dryer (50), and then the grain is broken by the vibrating sieve (60). Separated and recovered as product.

The following Table 1 shows the test results of the steamed rice loosening equipment constructed by incorporating the steamed rice loosening apparatus of the present invention according to the following specifications into a ventilation band type dryer (20). is there.

[Dimensions of loosening roller] Outer diameter of metal supporting roller: 50 mm Number of rubber hollow projections: 8 Projection wall thickness: 5 mm Projection height: 20 mm Groove depth: 0.5 mm Number of grooves: 8

[Interval of each loosening roller with respect to the mesh conveyor] First stage: +4.0 mm Second stage: +2.0 mm Third stage: -0.5 mm Fourth stage: -1.0 mm

Table 1 Non-defective particle size distribution (average of three times) ─────────────────────────── Frequency ratio (%) ─── ─────────────── [Grain breakage] 10 10.3 [Grain unit] 1 80 82.7 2 2.7 2.8 3 2.3 2.4 4 0.3 0.35 0.7 0.7 600 70.7 0.7 Total 96.7 100.0 ────

[0026]

As is clear from the above test results,
ADVANTAGE OF THE INVENTION According to the steamed rice loosening apparatus of this invention, the grain damage of a steamed rice is few, and the steamed rice product loosened per grain can be collect | recovered with high yield.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a loosening roller used in a steamed rice loosening apparatus of the present invention, wherein (a) is a front explanatory view and (b) is a sectional explanatory view.

FIG. 2 is an overall explanatory view showing an example of the steamed rice loosening device of the present invention.

FIG. 3 is an explanatory view of a steamed rice loosening apparatus in which the steamed rice loosening apparatus of the present invention is incorporated in a step of drying steamed rice.

[Explanation of symbols]

 (1): mesh conveyor (2): loosening roller (3): metal supporting roller (4): rubber hollow protrusion (5): groove (6): hollow support (10): boiled rice loosening device ( 20): Ventilation band type dryer (30): Conveyor (40): Heat exchanger (50): Ventilation band type dryer (60): Vibrating sieve

──────────────────────────────────────────────────続 き Continuing on the front page (72) Mizuho Honchu, 2-1 Okawacho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Mitsubishi Kakoki Machinery Co., Ltd. (72) Hiroshi Ikeda 2, Okawacho, Kawasaki-ku, Kawasaki-shi, Kanagawa No. 1 Inside Mitsubishi Kakoki Co., Ltd. (56) References JP-A-61-199820 (JP, A) JP-A-58-116639 (JP, A) Full-scale operation Sho-63-177185 (JP, U) Real-time operation Sho57 -1588 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) A23L 1/10

Claims (1)

(57) [Claims] 1. A mesh conveyor and a loosening roller which rotates in the same direction as the moving direction of the mesh conveyor, and the loosening roller is provided on the surface of the support roller in the same axial direction as that of the mesh roller and over the entire periphery of the support roller. Characterized by having a plurality of rubber hollow protrusions formed in the same circular arc, and having a number of grooves in the axial direction on the surface of each hollow protrusion. apparatus.