JPH0646770A - Production of aseptically packed cooked rice - Google Patents

Abstract

PURPOSE:To obtain a method for producing aseptic cooked rice without requiring a rice cooker in which the cooked rice can be heated with hot water for some ten min in a microwave oven and directly eaten. CONSTITUTION:Immersed drained rice 3 and, as necessary, water 4 in an amount suitable for cooking rice are housed in each rice cooking container 2, equipped with an opening 1, formed by using a material capable of withstanding rice cooking and having shape retaining properties in a clean room (A). This rice cooking container 2 is transferred with a conveyor and introduced into a rice cooker or pressurizing vessel 5 capable of simultaneously cooking the rice in the plural containers 2 to carry out the cooking of the rice. The resultant rice cooking containers in an intact state of the cooked rice are then taken out of the rice cooker or pressurizing vessel 5 and directly introduced into a hermetically sealing packaging machine 7 without transferring the cooked rice 6 from rice cooking containers 2. A bacteriostatic gas such as nitrogen gas or gaseous carbon dioxide gas or a mixed gas thereof is then introduced into the rice cooking containers 2 go replace air in the rice cooking containers 2 with the bacteriostatic gas as much as possible. In a state of the rice cooking containers 2 filled with the bacteriostatic gas, the openings 1 of the rice cooking containers 2 are hermetically sealed with a suitable means in the hermetically sealing and packaging machine 7 and the hermetically sealed rice cooking containers 2 are taken out of the hermetically sealing and packaging machine 7 to the outside of the clean room (A) to mass-produce the objective aseptically packed cooked rice.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing aseptic packed rice cooked without a rice cooker, which can be eaten immediately after being heated in a microwave oven for several minutes and in hot water for more than ten minutes.

[0002]

2. Description of the Related Art Recently, the problems to be solved by the invention
The cooked cooked rice packed in a serving is cooked for 2 minutes in a microwave oven or heated in boiling water for about 12 minutes to make cooked rice. This product, called aseptic packed rice, is not only favored by single people, but also has the potential to make rice cookers useless by restaurants.

Aseptic packed cooked rice is characterized in that the cooked cooked rice can be preserved in a sterile state for a long time at room temperature with the texture of cooked cooked cooked rice being almost the same as fresh cooked cooked rice.

Further, since the time and effort required for cooking rice can be saved, it is effective in preventing labor shortages, and even if an unexpected customer comes out, rice can be served immediately, and if used immediately before the store is closed, loss of cooked rice can be reduced, and quality can be improved. Also has the advantage that it can be kept constant.

As the cooked cooked rice which can be stored for a long period of time, there is already cooked cooked rice in a retort pack, but there is a marked difference in quality as compared with the cooked cooked cooked rice.

The retort cooked rice is prepared by adding 11 cooked rices.
Sterilize under high temperature pressure at 0 to 115 ° C for several minutes. For this reason, the rice is not fluffy, and the starch is eluted from the rice, resulting in a bad taste.

On the other hand, the taste of aseptic packed rice is remarkably good. The reason is as follows. Normally, cooked cooked rice deteriorates over time because various bacteria adhering to cooked rice alter starch and the cooked rice is oxidized by the air coming into contact with the cooked rice. This quality deterioration is overcome by the following method.

At the time of milling (brown rice is made into white rice), Nuka with various bacteria is scraped off as much as possible.

The cooked cooked rice is packed in a sterile room to prevent bacteria from adhering to the product.

When the cooked cooked rice is packed, air is expelled by filling it with antibacterial gas, and further, for example, a small bag containing an oxygen scavenger on the back side of a hermetic seal is stored in the pack container, Remove any air left in between.

Although the above measures have been taken, various bacteria still tend to adhere during the work of packing cooked cooked rice in a sterile room.

[0012] The reason is that it is difficult to maintain a large room in a completely sterile condition, and if various germs are attached to various working clothes worn by workers and various working tools used for packing, it is only that. Sterilization becomes difficult. Further, the small bag containing the oxygen scavenger contained in the container must be taken out by peeling off the top seal when heating in a microwave oven, which is a troublesome work.

The present invention provides a method for producing ordinary rice, red rice or rice ball-shaped aseptic packed rice cooked in celebration, which solves the above drawbacks.

[0014]

Means for Solving the Problems The gist of the present invention will be described with reference to the accompanying drawings. In a clean room, a rice cooker provided with a shape-retaining opening 1 formed by using a material that can withstand rice cooking. 2 contains soaked drained rice 3 and, if necessary, water 4 in an amount suitable for cooking rice, and this rice cooking container 2 is transferred by a conveyor and introduced into a rice cooker or a pressure can 5 capable of simultaneously cooking many rice. Cooked rice, remove it from the rice cooker or pressure can 5 in the rice cooked state, transfer the cooked rice 6 from the rice cooking container to the sales container as it is, and transfer it to the sealed packaging machine 7, nitrogen gas and carbon dioxide. In the state where the antibacterial gas such as gas or a mixed gas thereof is introduced into the rice cooker 2 to replace the air in the rice cooker 2 with the antibacterial gas as much as possible, and the rice cooker 2 is filled with the antibacterial gas. The opening of the rice cooker 2 in the hermetic packaging machine 7. Sealed by appropriate means, those relating to the preparation of aseptic packaged rice, characterized in that mass production of aseptic packaged rice and unloaded cooking container body 2 which is the sealed from seal packaging machine 7 to the outside of the clean room A.

Further, in the clean room A, one or more recessed portions 2'having a desired shape are formed on the rice cooking container 2 having the shape-retaining upper portion formed by using a material capable of withstanding rice cooking. A rice cooker capable of forming a large number of rice at the same time by storing the soaked drained rice 3 and water 4 in an amount suitable for rice cooking in the recess 2'and transferring the rice cooking container 2 by a conveyor. The rice is introduced into the pressure canister 5 to cook rice, and the cooked rice 6 is taken out from the rice cooker or the pressure canister 5 in the rice cooked state, and the cooked rice 6 is not transferred from the rice cooker 2 to the sales container and is directly sealed and packed 7 Into the rice cooking container 2, the sterilizing gas such as nitrogen gas, carbon dioxide gas or a mixed gas thereof is introduced into the rice cooking container 2 to replace the air in the rice cooking container 2 with the sterilizing gas as much as possible. Sealing and packaging machine filled with antibacterial gas The opening 1 in the rice cooker 2 is sealed by an appropriate means, and the sealed rice cooker 2 is carried out of the clean packaging machine 7 out of the clean room to mass-produce the sterile packed cooked rice. It relates to the manufacturing method.

[0016]

EXAMPLE FIG. 1 shows a conventional example in which rice 3 for cooking is immersed in draining rice 3 and then water 4 is injected and introduced into a long rice cooker a of a tunnel type (about 70 m), and slowly. Complete the cooking and steaming during the transfer in the tunnel, and then refill the rice cooked in the sterile room b into the commercial container c and put the sachet containing the oxygen scavenger into the top seal. And it is a product.

On the other hand, according to the present invention of FIG. 2, in the clean room room A, for example, the receiving frame 8 which can be stacked in multiple stages.
A large number of rice cookers 2 are placed side by side in the rice cooker, the soaked rice 3 is stored in the rice cooker 2, and an appropriate amount of water 4 for pouring rice is poured into the rice cooker or the pressure can 5 when necessary. 2 receiving frames
After stacking several rows of 0 to 30 sheets in several rows, they are stored and taken out from the rice cooker or pressure can 5 after being cooked and transferred into the sealed wrapping machine 7. Bacterial gas is introduced to replace the air in the rice cooker 2 with the antibacterial gas as much as possible, and the rice cooker 2 is filled with the antibacterial gas in the sealed packaging machine 7 in the opening 1 of the rice cooker 2. Are sealed by appropriate means, and the sealed rice cooker 2 is sealed and packed by a packing machine 7.
From the clean room to mass-produce sterile packed rice.

An embodiment of the first invention will be described.

The following steps are performed in the clean room A.

The first step is a dish-shaped rice cooker 2 having a shape-retaining property formed by using a material capable of withstanding steam cooked rice and having an opening 1 in the upper part, or a shape-retaining property having an opening 1 in the upper part. Dipped drained rice 3 and, if necessary, water 4 in an amount suitable for the cooked rice are injected into the bag-shaped cooked rice container 2 that it has. At this time, as the rice cooker 2, use a rice cooker 2 formed by adopting a synthetic resin having a heat-resistant and water-resistant barrier property (performance that does not allow passage of oxygen), for example, polypropylene laminated with vinylidene chloride capable of withstanding 120 ° C. Is desirable.

For example, well-polished glutinous rice (a small amount of glutinous rice may be mixed to make hardened rice) is placed in a serving lunch box-shaped rice cooker 2 for one person, and after rinsing, it is immersed in water for about 1 hour.
A suitable amount of soaked drained rice 3 for draining for one person is stored, and a suitable amount of water 4 for pouring this rice is poured by giving a slight vibration. Further, in the case of red rice, it is desirable to use glutinous rice soaked in drained rice 3 and cook rice with almost no water injection.

Second step The rice cooker 2 containing the soaked drained rice 3 and an appropriate amount of water 4 is introduced into a rice cooker or a pressure can 5 to cook rice. The receiving frames 8 in which a plurality of rice cookers 2 are arranged are stacked in multiple stages, and the receiving frames 8
It is desirable to cook a large number of rice cookers 2 at the same time by arranging a plurality of rows. Fill steam around 102 ° C and heat for about 20 minutes.

When rice is cooked using a pressure canister, steam at 105 ° C. is introduced so that the temperature inside the pressure canister is 10
Set at 2-105 ° C and heat for about 20 minutes. In this case, the degree of pressurization is increased for a predetermined period of time and then decreased for a predetermined period of time, and heating and pressurization is repeated by repeating this high or low, or steam is introduced intermittently for a predetermined period of time to cook rice, which makes it possible to cook more deliciously. confirmed.

Third step Without removing the cooked cooked rice 6 from the cooked rice container 2 to the sales container, the cooked rice 6 is taken out from the cooker or the pressure can 5 and introduced into the hermetic packaging machine 7, and nitrogen gas is introduced. A sterilizing gas such as or carbon dioxide gas or a mixed gas thereof is introduced into the rice cooker 2 to replace the air in the rice cooker 2 with the sterilizing gas as much as possible. Although 100% replacement is impossible, a synthetic resin having a barrier property sterilized above the opening 1 of the dish-shaped rice cooker 2 in the hermetic packaging machine 7 in a state in which the rice cooker 2 is filled with antibacterial gas as much as possible. Heat set film 9 and seal. In the case of a bag, the opening 1 at the polymerization edge is heat set and sealed. The bacteriostatic gas is preferably a mixed gas of about 20% nitrogen gas and about 80% carbon dioxide gas.

Fourth Step: The sealed cooked rice container 2 is discharged from the sealed packaging machine 7 to the outside of the clean room A to mass-produce sterile packed cooked rice.

An embodiment of the second invention will be described.

When rice is cooked in a rice ball shape, the soaked drained rice 3 is stored in the recess 2'of the rice cooker 2 and the optimum amount of water 4 for pouring rice is poured as needed.

The equipment used in each of the above steps is the same as in the first embodiment.

FIG. 5 is a layout view of various equipments for the clean room A. The clean room A is divided into a filling room A ₁ and a sealed working room A ₂ .

Reference numeral 10 is a rice tank, which transfers the submerged drained rice 3 to the filling work section 12 by the supply pipe 11 and fills the submerged rice drainage container 2 with the submerged drained rice 3. At the same time, an appropriate amount of water 4 is also poured.

Reference numeral 13 is an introduction conveyor to the pressure canister 5, reference numeral 14 is a delivery conveyor, and reference numeral 15 is a return conveyor for returning the empty receiving frame 8.

Reference numeral 16 is a transfer conveyer for transferring the cooked rice container 2 after the rice is cooked to the hermetic wrapping machine 7. The receiving frame 8 having a plurality of rice cooker containers 2 mounted in parallel is sequentially transferred into the hermetic wrapping machine 7.

Reference numeral 17 is a conveyer for the rice cooker 2, 18 is a top seal film, 19 is a film sterilizer, 20 is a hot printer, 21 is an antibacterial gas introduction device, 22 is a first seal device, and 23 is a second seal. A device, 24 is a cooling device, 25 is a trimming device, 26 is a carry-out conveyor, 27 and 28 are film rolls, and the cooked rice container 2 transferred into the hermetic packaging machine 7 introduces an antibacterial gas by the above-mentioned facilities. The top seal is sequentially sealed, and the product is carried out from the clean room A.

[0034]

As described above, the present invention is superior to the conventional method in which an operator packs cooked rice in a container in an aseptic room, introduces nitrogen gas, encloses an oxygen scavenger and packs. Then, without transferring the cooked rice to the selling container, the rice container taken out from the rice cooker or the pressure can is transferred to the sealed packaging machine as it is in the rice cooked state, and the bacteriostatic gas is introduced into the rice cooked container. Replace the air in the rice cooker with bacteriostatic gas and seal the rice cooker with the bacteriostatic gas filled with the bacteriostatic gas by top-sealing or heat-setting the opening. Therefore, as shown in the table below, it is a method for producing aseptic packed cooked rice that has the outstanding characteristics that deliciously packed aseptic packed rice and aseptic packed rice balls that can last a long time without being affected by various bacteria are produced at an extremely low cost.

[0035]

[Table 1]

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a conventional example.

FIG. 2 is an explanatory diagram of a manufacturing process of the present invention.

FIG. 3 is a perspective view showing a state in which a part of the top seal of aseptic packed rice of the example using the dish-shaped container of the present invention is opened.

FIG. 4 is a perspective view showing a state where a part of the top seal of the aseptic pack rice ball using the dish-shaped container of the present invention is opened.

FIG. 5 is an explanatory plan view of a clean room.

FIG. 6 is an explanatory diagram of a hermetic packaging machine.

[Explanation of symbols]

 A Clean room 1 Opening 2 Rice cooker 2'Concave 3 Immersion drained rice 4 Water 5 Rice cooker or pressure can 6 Cooked rice 7 Sealed packaging machine

Claims (2)

[Claims] 1. In a clean room, a rice cooking container provided with an opening having a shape-retaining property formed by using a material that can withstand rice cooking stores the drained rice and, if necessary, an amount of water suitable for cooking rice. Then, transfer this rice cooker on a conveyor,
Introduce into a rice cooker or pressure can that can cook many rice at the same time, cook rice, take out from the rice cooker or pressure can in the rice cooked state, do not transfer the cooked rice from the rice cooker to the sales container Transfer to the sealed packaging machine as it is, introduce antibacterial gas such as nitrogen gas, carbon dioxide gas or a mixed gas thereof into the rice cooker to replace the air in the rice cooker with the antibacterial gas as much as possible to make the rice cooker. Characterized by sealing the opening of the rice cooker inside the hermetically-sealed packaging machine in a state filled with antibacterial gas by appropriate means, and carrying out the hermetically-sealed rice-sealing vessel from the hermetically-sealed packaging machine to the outside of the clean room to mass-produce sterile packed rice Aseptic packed rice production method. 2. In a clean room, one or more concave portions having a desired shape are formed in a rice cooker body having a shape-retaining upper portion formed by using a material capable of withstanding rice cooking. The rice is soaked in water and the amount of water suitable for cooking rice is stored in the inside, and this rice cooking container is transported by a conveyor, and it is introduced into a rice cooker or a pressure can that can cook many rice at the same time and cooks rice. , Take it out of the rice cooker or pressure can in the rice cooked state, and transfer the cooked rice from the rice cooker to the sales container without transferring it to the sealed packaging machine, like nitrogen gas or carbon dioxide gas or its mixed gas The sterilizing gas is introduced into the rice cooker to replace the air in the rice cooker with the sterilizing gas as much as possible. Close the openings by appropriate means A method for producing aseptic-packed cooked rice, which comprises sealing and discharging the sealed cooked rice container from a sealed packaging machine to the outside of a clean room to mass-produce sterile-packed cooked rice.