JP3445397B2 - Method and apparatus for freezing cooked rice - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for cooling cooked cooked rice to freeze it and then crushing the cooked cooked rice into pieces.

[0002]

[Technical background] In recent years, many cooked frozen foods have been sold due to diversified lifestyles, and cooked rice is no exception. If this boiled rice is a lump, the heat does not pass well when it is passed through hot water or heated in a microwave oven, and it cannot be returned to delicious freshly cooked rice. In addition, when the bag is packed, the weighing and the bag packing are hindered. For this reason, it is preferable that the frozen cooked rice is separated into individual cooked rice grains.

As a technique for freezing and disaggregating cooked rice, Japanese Patent Laid-Open Nos. 57-65156, 57-65157, 57-99148 and 60-22764 are known.
There is one described in Japanese Patent Publication No. 4 or the like. The technique is to cool cooked cooked rice a to normal temperature, freeze the cooked cooked rice a to block it, and break the blocked cooked rice a into pieces by using a rotating comb (Japanese Patent Laid-Open No. 60-227644). reference).

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The crushing and disintegration by the rotary comb described in the above publication is carried out by feeding a blocked frozen cooked rice into the rotary comb and impacting the rotary comb and shearing force between the rotary comb and the fixed comb. Crush into pieces to make cooked rice grains.

However, a rotary comb is usually one in which thin comb teeth are planted in the peripheral axis direction (see FIG. 2), and a block-shaped lump of cooked rice is not easily cracked, so that momentum, impact force and shear force are not generated. It tended to increase, and the rice grains were often cracked. If the grain of cooked rice is broken, the value of the product is inferior, and in the worst case, the product cannot be manufactured.

Under the above circumstances, it is an object of the present invention to smoothly break frozen block cooked rice into cooked rice grains and to minimize cracks in the cooked rice grains.

[0007]

In order to solve the above-mentioned problems, in the invention relating to the method of breaking up, first, cooked cooked rice a is frozen into a block shape, and this block-shaped cooked rice a is finely divided. After the splitting, the splitting pieces were fed into a plurality of rotary combs arranged in parallel to be separated, and further, the rotational speed of each rotary comb was appropriately increased along the feeding direction of the splitting pieces. It has been configured.

In this method of separating, it is preferable that the feeding speed of cooked rice is slowed along the feeding direction of the split pieces.

In addition, in the invention relating to the separating device,
On the belt conveyor, a plurality of rotary combs are provided in parallel along the conveying direction, and beating means for finely dividing the block-shaped frozen cooked rice fed to the starting end of the belt conveyor is provided, and each rotary comb has its rotation speed. Is configured to be appropriately fast along the transport direction.

In this disaggregation apparatus, the belt conveyor is composed of a plurality of conveyors along the carrying direction, and the carrying speed of each of the conveyors is appropriately delayed in the carrying direction. Further, the belt conveyor is made air-permeable, and a plurality of rotary combs adjacent to each other are formed as a pair, and the pair of rotary combs are meshed with each other, and the comb teeth of the pair are meshed with each other. The lower surface of the belt conveyor may be configured so that the cool air ejection port faces.

[0011]

According to the present invention thus constituted, the block-shaped frozen cooked rice is beaten into pieces before being crushed and broken by the rotating comb, and the pieces are crushed and broken by the rotating comb. Therefore, when crushing and disintegrating, a large force is not required for impact and shearing, and cracks of cooked rice grains are minimized.

Further, since the rotation speed of the rotary comb also increases with the movement of the cooked rice grains, the lumps of cooked rice grains gradually become smaller and are smoothly disintegrated into cooked rice grains.

Further, if the feed rate of cooked rice is slowed, the residence time of cooked rice becomes longer as it moves, and the time during which it is subjected to the crushing action becomes longer, which promotes crushing and disintegration.

If the comb teeth of the rotary comb are meshed with each other and cold air is blown up to the meshed parts, shearing by meshing is carried out in a fluid state, and disaggregation and disaggregation are further promoted.

[0015]

EXAMPLE FIG. 1 shows an outline of a freezing and smashing facility for cooked rice. Cooked cooked rice a is rapidly frozen into a block in the freezing zone A, and the frozen frozen cooked rice a is in a net conveyor 10. Then, it is sent to the crushing and separating zone B in the next step. At this time, the block-shaped cooked rice a is not frozen to the core, but is solidified by the ice crystals on the surface (see Japanese Patent Application No. 6-241268). Immediately before this feeding, as shown in FIG. 2, a rotary shaft 11 is provided, and the arm 12 of this rotary shaft 11 is tapped on the block-shaped rice grain a, and the cooked rice a becomes a split piece a ′.

The crushing and separating zone B is the net conveyor 2
Rotating combs 21a, 21b, 21c, 21d on the transport surface of 0
(Generic code: 21) is arranged. The foremost rotary comb 21a meshes with the fixed comb 22, and the cooked rice pieces a'are first crushed and separated at this portion. Rotating comb 21
The number of is arbitrary.

The rotating combs 21 form a pair and both comb teeth 23
a and 23b and 23c and 23d mesh with each other. The jet nozzle 24 faces this meshing portion, and the nozzle 2
Cold air was blown out from No. 4 and cooked rice pieces (rice rice grains a ″) a ′
To promote the shearing action. Each pair of rotating combs 21
A fixed comb 25 having a mountain-shaped cross section is provided between a, 21b and 21c, 21d.
The meshing with b and 21c also promotes disintegration and disintegration.

The crushed and crushed cooked rice grains a ″ are further sent to the re-freezing zone C in the next step and frozen to the core,
The process shifts to the next process, such as a bag filling process. In the figure, 30 is a net conveyor, 31 is a leveling roller, 32 is a cooling means, 33
Is a rotary comb for scraping, and 34 is a fall prevention plate. In addition,
Each zone A, B, C is divided and covered by a heat insulating box, and cool air before and after flows at −35 to −40 ° C.

The rotational speeds of the rotary combs 21 may be the same, but may be different such that 21a <21b ≦ 21c <21d. In this way, the rotation speed increases as the cooked rice a ′ moves, so that the crushing action becomes smooth.

Further, as shown in FIGS. 3 and 4, the conveyor 20 is disassembled back and forth, and its speed is changed from the front stage 20a to the rear stage 2.
If it is faster than 0b, the feed rate of the cooked rice (split) a'will be slower in the subsequent stage, the residence time of the cooked rice a'will be longer, and the crushing and separating action will be promoted. The speed difference is appropriately about 3 times, but is arbitrary. The number of divisions of the conveyor 20 is arbitrary.

[0021]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it can be crushed into pieces and broken smoothly without breaking rice grains.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an embodiment.

FIG. 2 is a schematic perspective view of an essential part of the embodiment.

FIG. 3 is a schematic view of another embodiment.

FIG. 4 is a schematic view of another embodiment.

[Explanation of symbols]

A frozen block zone B Disintegration and disintegration zone C refrigeration zone 10, 20, 30 Net conveyor 11 rotation axis 12 Tapping Arm 21, 21a, 21b, 21c, 21d Rotating comb 22, 25 fixed comb 23a, 23b, 23c, 23d comb teeth 24 Cold air jet nozzle 31 Leveling roller 32 Cooling means

Claims (2)

(57) [Claims] 1. The cooked cooked rice a is frozen into a block shape, and after the block-shaped cooked rice a is finely divided, the split pieces a'are fed into a plurality of rotary combs 21 arranged in parallel, and the rotary combs are formed. When splitting the split pieces a ′ by 21 to separate the frozen cooked rice a, the rotating combs 21a, 21b, 21c, and 21d are speeded up appropriately along the feeding direction of the split pieces a ′ . And
A method for freezing cooked rice, characterized in that the feed rate of cooked rice a'is slowed along the feeding direction of the split piece a '. 2. A plurality of rotating combs 21a, 21b, 21c, 21d on the belt conveyor 20 along the conveying direction thereof.
Are provided in parallel, and beating means 12 for finely breaking the block-shaped frozen cooked rice a fed to the start end of the belt conveyor 20 is provided, and the rotary combs 21a, 21b, 2 are provided.
1c, 21d, along with being faster appropriately along its rotational speed is the transport direction, the belt conveyor 20
A plurality of conveyors 21a, 21 along the carrying direction.
b), wherein the convey speed of each of the conveyors 20a, 20b is appropriately delayed in the conveying direction in order, so that the cooked rice freezing / separating device is characterized.