JP2023090547A - Powder can, and manufacturing method and manufacturing device of the same - Google Patents

Powder can, and manufacturing method and manufacturing device of the same Download PDF

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JP2023090547A
JP2023090547A JP2021205556A JP2021205556A JP2023090547A JP 2023090547 A JP2023090547 A JP 2023090547A JP 2021205556 A JP2021205556 A JP 2021205556A JP 2021205556 A JP2021205556 A JP 2021205556A JP 2023090547 A JP2023090547 A JP 2023090547A
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powder
liquid nitrogen
metal container
lid
dropped
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瑞希 小野
Mizuki Ono
清美 渡辺
Kiyomi Watanabe
勝也 丸尾
Katsuya Maruo
亮児 藤井
Ryoji Fujii
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Daiwa Can Co Ltd
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Daiwa Can Co Ltd
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Priority to JP2021205556A priority Critical patent/JP2023090547A/en
Priority to PCT/JP2022/046249 priority patent/WO2023112991A1/en
Publication of JP2023090547A publication Critical patent/JP2023090547A/en
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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23FCOFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00Coffee; Coffee substitutes; Preparations thereof
    • A23F5/24Extraction of coffee; Coffee extracts; Making instant coffee
    • A23F5/36Further treatment of dried coffee extract; Preparations produced thereby, e.g. instant coffee
    • A23F5/38Agglomerating, flaking or tabletting or granulating
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/34Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
    • A23L3/3409Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23L3/3418Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/04Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vacuum Packaging (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Tea And Coffee (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Packages (AREA)

Abstract

To provide a powder can, and a manufacturing method and a manufacturing device of the powder can that can control powder deterioration and container defects.SOLUTION: In a manufacturing method of a powder can 100, a can body 111 of a metal container 101 is filled with powder 102, and a predetermined amount of liquid nitrogen is dropped multiple times at intervals of 1 to 60 seconds into the can body 111 filled with the powder 102, and a mouth 121d of the can body 111 is sealed with a lid 112 of the metal container 101.SELECTED DRAWING: Figure 3

Description

本発明は、粉体を金属容器に密封した粉体缶詰、粉体缶詰の製造方法及び製造装置に関する。 TECHNICAL FIELD The present invention relates to powder canned food in which powder is sealed in a metal container, and to a powder canned food manufacturing method and manufacturing apparatus.

粉体を容器内に密封した容器詰め粉体が流通している。例えば、このような容器詰め粉体として、コーヒー豆を粉砕したコーヒー豆粉砕物やコーヒー抽出液から製造した粉状あるいは顆粒状のインスタントコーヒー等のコーヒー粉体を容器に充填し密封した容器詰めコーヒー粉体が知られている。また、例えば、容器詰め粉体として、粉体あるいは顆粒状等の砂糖、顆粒だし、コンソメ、穀物、ニンニク、粉ミルク等の種々の食材や食品や、ペット用の餌等が知られている。 Container-packed powder, in which powder is sealed in a container, is on the market. For example, as such a container-packed powder, a container-packed coffee obtained by filling a container with coffee powder such as ground coffee beans or powdery or granulated instant coffee produced from a coffee extract and sealing the container. Powders are known. Further, for example, as container-filled powders, various ingredients and foods such as powdered or granular sugar, granulated stock, consommé, grains, garlic, powdered milk, pet food, and the like are known.

このような粉体は、容器内の残存酸素量が低いほど、酸化による品質の低下を防止できる。このため、容器に粉体を充填する際に、脱気を行うことや、エージレスなどの脱酸素剤を添加する方法や、密封の前に液体窒素の滴下を行うことが知られている。また、液体窒素の滴下を2回に分けて行う技術も知られている(特許文献1参照)。 Such powder can be prevented from deteriorating in quality due to oxidation as the amount of oxygen remaining in the container is low. For this reason, it is known to perform degassing when filling a container with powder, to add an oxygen scavenger such as AGELESS, or to drip liquid nitrogen before sealing. There is also known a technique in which liquid nitrogen is dropped in two steps (see Patent Document 1).

特公平8-022207号公報Japanese Patent Publication No. 8-022207

特許文献1の製造方法では、缶体に液体窒素を滴下した後にレギュラーコーヒーを充填している為、缶体内部で気化した窒素が、その後に充填されるレギュラーコーヒーによって缶体の外へ追い出される。このため、容器内の酸素を窒素に置換する効率が悪い。また、液体窒素の滴下を複数回行う場合、滴下の間隔や、密封のタイミングなどの最適条件が確立されておらず、効率よく置換を行うことができず、容器内に残存する酸素の濃度を十分に低下させることができなかった。このため、容器内の粉体が劣化することを防止できる技術が求められている。また、容器として金属容器を用いる技術も知られているが、容器内の圧力が高いと、開封時に粉体が吹き出すことや、容器が変形する等の不具合が生じる虞がある。 In the manufacturing method of Patent Document 1, since regular coffee is filled after dripping liquid nitrogen into the can body, the nitrogen vaporized inside the can body is driven out of the can body by the regular coffee that is subsequently filled. . Therefore, the efficiency of replacing oxygen in the container with nitrogen is low. In addition, when liquid nitrogen is dropped multiple times, the optimum conditions such as the interval between drops and the timing of sealing have not been established, and replacement cannot be performed efficiently. could not be lowered sufficiently. Therefore, there is a demand for a technique that can prevent the powder in the container from deteriorating. A technique using a metal container as a container is also known.

そこで本発明は、粉体の劣化及び容器の不具合を抑制できる粉体缶詰、粉体缶詰の製造方法及び製造装置を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a powder canned food, a powdery canned food manufacturing method, and a manufacturing apparatus capable of suppressing deterioration of the powder and troubles of the container.

本発明の一態様によれば、粉体缶詰は、粉体と、前記粉体が充填されるとともに、密封され、内圧が0.15MPa以下であり、酸素濃度が5%以下の金属容器と、を備える。 According to one aspect of the present invention, the powder can includes powder, a sealed metal container filled with the powder, having an internal pressure of 0.15 MPa or less and an oxygen concentration of 5% or less, Prepare.

本発明の一態様によれば、粉体缶詰の製造方法は、金属容器の缶胴に粉体を充填し、所定量の液体窒素を1秒~60秒の間隔で前記粉体が充填された前記缶胴の内部へ複数回滴下し、前記缶胴の口部を前記金属容器の蓋で密封する。 According to one aspect of the present invention, a method for manufacturing powder cans includes filling a can body of a metal container with powder, and filling a predetermined amount of liquid nitrogen with the powder at intervals of 1 second to 60 seconds. It is dripped into the inside of the can body several times, and the mouth of the can body is sealed with the lid of the metal container.

本発明の一態様によれば、製造装置は、金属容器の缶胴に粉体が充填された金属容器の缶胴の内部へ液体窒素を滴下するノズルと、前記ノズルから所定量の液体窒素を1秒~60秒の間隔で複数回滴下させる制御装置と、前記缶胴の口部を前記金属容器の蓋で密封する密封機と、を備える。 According to one aspect of the present invention, the manufacturing apparatus includes a nozzle for dropping liquid nitrogen into the inside of the can body of the metal container filled with powder, and a predetermined amount of liquid nitrogen from the nozzle. A control device for dropping multiple times at intervals of 1 second to 60 seconds, and a sealing machine for sealing the mouth of the can body with the lid of the metal container.

本発明によれば、粉体の劣化及び容器の不具合を抑制できる粉体缶詰、粉体缶詰の製造方法及び製造装置を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the powder canned food which can suppress deterioration of powder and the trouble of a container, the manufacturing method of powdered canned food, and a manufacturing apparatus can be provided.

本発明の一実施形態に係る粉体缶詰の構成を、一部省略して示す側面図。BRIEF DESCRIPTION OF THE DRAWINGS The side view which abbreviate|omits a part and shows the structure of the powder canned food which concerns on one Embodiment of this invention. 同粉体缶詰の金属容器の構成を示す側面図。The side view which shows the structure of the metal container of the same powder can. 同粉体缶詰の製造装置の構成の一例を模式的に示す説明図。Explanatory drawing which shows typically an example of a structure of the manufacturing apparatus of the same powder canned food. 同製造装置の液体窒素供給機の構成を模式的に示す説明図。Explanatory drawing which shows typically the structure of the liquid nitrogen feeder of the same manufacturing apparatus. 同液体窒素供給機の他の例の構成を模式的に示す説明図。Explanatory drawing which shows typically the structure of the other example of the same liquid nitrogen supply machine. 同粉体缶詰の製造方法の一例を示す流れ図。The flowchart which shows an example of the manufacturing method of the same powder canned food. 第1評価試験の結果を示す説明図。Explanatory drawing which shows the result of a 1st evaluation test. 第1評価試験の結果を示す説明図。Explanatory drawing which shows the result of a 1st evaluation test. 第2評価試験の結果を示す説明図。Explanatory drawing which shows the result of a 2nd evaluation test. 第2評価試験の結果を示す説明図。Explanatory drawing which shows the result of a 2nd evaluation test. 第2評価試験の結果を示す説明図。Explanatory drawing which shows the result of a 2nd evaluation test. 第3評価試験の結果を示す説明図。Explanatory drawing which shows the result of the 3rd evaluation test. 第3評価試験の結果を示す説明図。Explanatory drawing which shows the result of the 3rd evaluation test.

以下、本発明の一実施形態に係る粉体缶詰100、並びに、粉体缶詰100の製造装置1及び製造方法について、図1乃至図6を用いて説明する。
図1は、本発明の一実施形態に係る粉体缶詰100の構成を、金属容器101の側面の一部を省略して示す側面図であり、図2は、金属容器101の構成を示す側面図である。図3は、粉体缶詰100の製造装置1の構成の一例を模式的に示す説明図であり、図4は、製造装置1の液体窒素供給機13の構成を模式的に示す説明図であり、図5は、液体窒素供給機13の他の例の構成を模式的に示す説明図である。図6は、粉体缶詰100の製造方法の一例を示す流れ図である。
A powder canned food 100 according to an embodiment of the present invention and an apparatus 1 and a method for producing the powdered canned food 100 will be described below with reference to FIGS. 1 to 6. FIG.
FIG. 1 is a side view showing the configuration of a powder can 100 according to an embodiment of the present invention, with a part of the side surface of the metal container 101 omitted, and FIG. 2 is a side view showing the configuration of the metal container 101. It is a diagram. FIG. 3 is an explanatory view schematically showing an example of the configuration of the manufacturing apparatus 1 for the powder canned food 100, and FIG. 4 is an explanatory view schematically showing the configuration of the liquid nitrogen feeder 13 of the manufacturing apparatus 1. FIG. 5 is an explanatory diagram schematically showing the configuration of another example of the liquid nitrogen supply device 13. As shown in FIG. FIG. 6 is a flowchart showing an example of a method for manufacturing the powder canned food 100. As shown in FIG.

(粉体缶詰100)
まず、粉体缶詰100について説明する。
図1に示すように、粉体缶詰100は、金属容器101により所定量の粉体102が包装されることで構成される。粉体缶詰100は、金属容器101内に所定量の粉体102が充填され、液体窒素(LN)が複数回滴下された後に密封されることにより製造される。粉体缶詰100は、例えば、陽圧缶である。
(Canned powder 100)
First, the powder canned food 100 will be described.
As shown in FIG. 1, a powder can 100 is configured by packaging a predetermined amount of powder 102 in a metal container 101 . A powder can 100 is manufactured by filling a predetermined amount of powder 102 into a metal container 101, dropping liquid nitrogen (LN) several times, and then sealing the container. Powder canned food 100 is, for example, a positive pressure can.

具体的には、粉体缶詰100は、金属容器101と、金属容器101内に密封された、内容物である所定量の粉体102と、を備えている。粉体缶詰100は、例えば、密封されており、開封後でも再封可能に形成されている。 Specifically, the powder can 100 includes a metal container 101 and a predetermined amount of powder 102 sealed inside the metal container 101 as contents. The powder canned food 100 is, for example, hermetically sealed so that it can be resealed even after being opened.

開封前の粉体缶詰100は、例えば、内圧が0.15MPa以下であり、酸素濃度が5%以下である。なお、粉体缶詰100の内圧は、0.15MPa以下であって、且つ、金属容器101の耐久圧力以下に設定される。ここで、耐久圧力とは、金属容器101が、内圧によって変形しない圧力である。また、粉体缶詰100は、例えば、金属容器101の容積に対して、粉体102の体積(充填率)は、5%乃至98%である。 The powder canned food 100 before opening has, for example, an internal pressure of 0.15 MPa or less and an oxygen concentration of 5% or less. Note that the internal pressure of the powder can 100 is set to 0.15 MPa or less and to the withstand pressure of the metal container 101 or less. Here, the withstand pressure is the pressure at which the metal container 101 is not deformed by the internal pressure. In the powder canned food 100, for example, the volume (filling rate) of the powder 102 is 5% to 98% with respect to the volume of the metal container 101.

図1に示すように、金属容器101は、例えば、缶胴111と、蓋112と、を備える。金属容器101は、缶胴111に蓋112が固着されることで、密封される。 As shown in FIG. 1, the metal container 101 includes, for example, a can barrel 111 and a lid 112 . The metal container 101 is hermetically sealed by fixing the lid 112 to the can body 111 .

缶胴111は、円筒状に形成される。缶胴111は、その開口する口部121dが蓋112により密封される。缶胴111は、例えば、ボトル型缶である。図1及び図2に示すように、例えば、缶胴111は、胴体121と、底蓋122と、を備える。缶胴111は、胴体121の底側の開口に底蓋122が巻締め固着される。 The can barrel 111 is formed in a cylindrical shape. The can body 111 is hermetically sealed with a lid 112 at its open mouth 121d. The can body 111 is, for example, a bottle-type can. As shown in FIGS. 1 and 2 , for example, the can body 111 includes a body 121 and a bottom lid 122 . The can body 111 has a bottom lid 122 fixedly secured to the opening on the bottom side of the body 121 by seaming.

胴体121は、例えばアルミニウム合金又は鋼材等の金属材料で形成される。胴体121は、例えば、胴部121aと、胴部121aの上端側に連続して形成されている肩部121bと、肩部121bの先端に連続して形成されている内径の円筒状の首部121cと、首部121cの先端に形成された口部121dと、を有する。 The body 121 is made of a metal material such as an aluminum alloy or steel. The body 121 includes, for example, a body portion 121a, a shoulder portion 121b formed continuously from the upper end side of the body portion 121a, and a cylindrical neck portion 121c with an inner diameter formed continuously from the tip of the shoulder portion 121b. and a mouth portion 121d formed at the tip of the neck portion 121c.

胴部121aは、円筒状に形成される。胴部121aは、例えば、下端の開口が縮径し、底蓋122が巻締固着される。胴部121aは、下端以外が、例えば同一径に形成される。肩部121bは、胴部121aの上端と一体に連続して形成される。肩部121bは、胴部121aから首部121cに向かって漸次縮径する。 The trunk portion 121a is formed in a cylindrical shape. The trunk portion 121a has, for example, a diameter-reduced opening at the lower end, and the bottom lid 122 is seamed and fixed. The trunk portion 121a is formed to have, for example, the same diameter except for the lower end. The shoulder portion 121b is formed integrally and continuously with the upper end of the body portion 121a. The shoulder portion 121b gradually decreases in diameter from the body portion 121a toward the neck portion 121c.

首部121cは、肩部121bの上端と一体に連続して形成される。首部121cには、雄ネジ部121eが設けられる。口部121dは、内容物である粉体102の抽出口となる。口部121dは、首部121cに蓋112を取り付けることにより密封される。 The neck portion 121c is formed integrally and continuously with the upper end of the shoulder portion 121b. A male screw portion 121e is provided on the neck portion 121c. The mouth portion 121d serves as an extraction port for the powder 102, which is the content. Mouth 121d is sealed by attaching lid 112 to neck 121c.

このような缶胴111は、口部121dの口径及び胴部121aの胴径の口径/胴径比率が40%~85%である。 Such a can body 111 has a diameter/body diameter ratio of the diameter of the mouth portion 121d and the diameter of the body portion 121a of 40% to 85%.

底蓋122は、例えばアルミニウム合金又は鋼材等の金属材料で形成された平板材により形成されている。底蓋122は、円盤状に形成されるとともに、その外周のフランジ部が胴体121の胴部121aの下端開口と巻締固着されることで、胴体121に気密に固定される。 The bottom lid 122 is made of a flat plate made of a metal material such as aluminum alloy or steel. The bottom lid 122 is formed in a disc shape, and is airtightly fixed to the body 121 by seaming and fixing the bottom end opening of the body 121a of the body 121 at the outer peripheral flange portion.

蓋112は、缶胴111の首部121cの雄ネジ部121eに螺合し、内部に設けられたシール部材が缶胴111の口部121dと当接することで、缶胴111を密封する。蓋112は、例えば、円板状の天板部112aと、天板部112aの周縁部から垂下する円筒状のスカート部112bと、を備えている。 The lid 112 is screwed onto the male threaded portion 121e of the neck portion 121c of the can body 111, and the seal member provided inside contacts the mouth portion 121d of the can body 111 to seal the can body 111. As shown in FIG. The lid 112 includes, for example, a disk-shaped top plate portion 112a and a cylindrical skirt portion 112b hanging down from the peripheral edge portion of the top plate portion 112a.

また、蓋112は、スカート部112bに、天板部112a側の端部から開口する端部まで、ナール部112c、雌ネジ部112d及びタンパーエビデンスバンド部112eを備える。 Further, the lid 112 includes a knurled portion 112c, a female screw portion 112d, and a tamper evidence band portion 112e from the end on the top plate portion 112a side to the open end on the skirt portion 112b.

粉体102は、粉状、粒状又は顆粒状に形成される。粉体102は、缶胴111内に所定の量だけ充填される。粉体102は、例えば、コーヒー豆粉砕物、コーヒー抽出液から製造した粉状あるいは顆粒状のインスタントコーヒー等のコーヒー粉体、粉状、顆粒状又は粒状の砂糖、顆粒だし、顆粒コンソメ、穀物、粉末状又は顆粒状のニンニク及び粉ミルク等の調味料、食材及び食品、並びに、ペット用の餌等、種々のものである。粉体102は、平均粒径が0.01mm乃至10mmの範囲内であり、上限粒径が5mm乃至15mmの範囲内であり、下限粒径が0.001mm乃至0.5mmの範囲内である。粉体102は、酸素によって質の劣化等が生じるものであれば、適宜選択できる。 The powder 102 is formed into powder, granules or granules. A predetermined amount of the powder 102 is filled in the can body 111 . The powder 102 is, for example, ground coffee beans, coffee powder such as powdery or granular instant coffee produced from coffee extract, powdery, granular or granular sugar, granule stock, granule consommé, grains, There are various types of seasonings such as powdered or granular garlic and powdered milk, foodstuffs and foods, and pet food. The powder 102 has an average particle size in the range of 0.01 mm to 10 mm, an upper limit particle size in the range of 5 mm to 15 mm, and a lower limit particle size in the range of 0.001 mm to 0.5 mm. The powder 102 can be appropriately selected as long as the quality of the powder 102 is deteriorated by oxygen.

(粉体缶詰100の製造装置1)
次に、粉体缶詰100の製造装置1を、図3及び図4を用いて説明する。
図3に示すように、製造装置1は、リンサー11と、粉体充填機12と、液体窒素供給機13と、密封機14と、搬送装置18と、を備えている。製造装置1は、工場に設置され、粉体缶詰100の量産ラインを構成する。
(Manufacturing apparatus 1 for powder canned food 100)
Next, the manufacturing apparatus 1 for the powder canned food 100 will be described with reference to FIGS. 3 and 4. FIG.
As shown in FIG. 3, the manufacturing apparatus 1 includes a rinser 11, a powder filling machine 12, a liquid nitrogen supply machine 13, a sealing machine 14, and a conveying device 18. The manufacturing apparatus 1 is installed in a factory and constitutes a mass production line for the powder canned food 100 .

リンサー11は、粉体102を充填する前の金属容器101としての缶胴111を洗浄する洗浄機である。例えば、粉体102を充填する前の缶胴111は、予め胴体121に底蓋122が巻締め固着されることで形成される。 The rinser 11 is a washing machine for washing the can body 111 as the metal container 101 before the powder 102 is filled. For example, the can body 111 before being filled with the powder 102 is formed by previously fixing the bottom lid 122 to the body 121 by seaming.

粉体充填機12は、所定の量の粉体102を缶胴111に充填する所謂フィラーである。本実施形態においては、粉体充填機12は、粉体102を貯留するタンク12aと、タンク12aに貯留された粉体102を所定の量だけ缶胴111に供給する供給部12bと、を備える。供給部12bは、ノズルや配管を有し、タンク12aから缶胴111までの粉体102の供給ラインを構成する。供給部12bは、粉体102を計測し、計測した所定量の粉体102を供給する。 The powder filling machine 12 is a so-called filler that fills the can body 111 with a predetermined amount of powder 102 . In this embodiment, the powder filling machine 12 includes a tank 12a for storing the powder 102, and a supply unit 12b for supplying a predetermined amount of the powder 102 stored in the tank 12a to the can body 111. . The supply part 12 b has a nozzle and a pipe, and constitutes a supply line for the powder 102 from the tank 12 a to the can body 111 . The supply unit 12b measures the powder 102 and supplies the measured predetermined amount of the powder 102 .

ここで、粉体102の計測方法としては、重量による計測であってもよく、また、体積による計測であってもよい。また、計測としては、実際の重力又は体積を測定する方法を用いてもよく、また、所定量の粉体102を収容できる容積を有する収容部を設け、この収容部に粉体102を収容させることで、所定量の粉体102を計測する構成であってもよい。また、供給部12bは、これらの構成に限定されず、所定の量の粉体102を缶胴111に充填できる構成であれば、種々の構成が適用できる。 Here, the method for measuring the powder 102 may be measurement by weight or measurement by volume. Further, as the measurement, a method of measuring actual gravity or volume may be used. Alternatively, a storage portion having a volume capable of storing a predetermined amount of powder 102 is provided, and powder 102 is stored in this storage portion. Thus, a configuration may be adopted in which a predetermined amount of powder 102 is measured. Moreover, the supply part 12b is not limited to these configurations, and various configurations can be applied as long as the can body 111 can be filled with a predetermined amount of the powder 102 .

液体窒素供給機13は、粉体充填機12の二次側に設けられる。液体窒素供給機13は、所定量の液体窒素(LN)を複数回、所定の間隔を空けて粉体102が充填された缶胴111内に滴下する。例えば、液体窒素供給機13は、滴下の間隔を1秒~60秒の範囲内で、より好ましくは、滴下の間隔を2秒~30秒で、2回以上、好ましくは3回以上に分けて、液体窒素を缶胴111内に滴下させる。また、液体窒素供給機13が供給する液体窒素の量は、液体窒素を供給して密封したときに、金属容器101内の圧力が所望の圧力となる量であり、例えば、複数回滴下するときの液体窒素の総供給量(総滴下量)、及び、一回当たりに滴下する液体窒素の供給量(滴下量)は、適宜設定可能である。なお、複数回滴下するときの各滴下における液体窒素の供給量は、同じであってもよく、異ならせても良い。 A liquid nitrogen feeder 13 is provided on the secondary side of the powder filling machine 12 . The liquid nitrogen supplier 13 drops a predetermined amount of liquid nitrogen (LN) multiple times into the can body 111 filled with the powder 102 at predetermined intervals. For example, the liquid nitrogen supply device 13 has a dropping interval of 1 second to 60 seconds, more preferably a dropping interval of 2 seconds to 30 seconds, and is divided into two or more times, preferably three or more times. , liquid nitrogen is dripped into the can body 111 . Further, the amount of liquid nitrogen supplied by the liquid nitrogen supply device 13 is an amount such that the pressure inside the metal container 101 becomes a desired pressure when the liquid nitrogen is supplied and sealed. The total supply amount of liquid nitrogen (total dripping amount) and the supply amount (dripping amount) of liquid nitrogen to be dripped per time can be set as appropriate. Note that the amount of liquid nitrogen supplied in each drop when dropping multiple times may be the same or may be different.

例えば、液体窒素供給機13は、液体窒素を貯留するタンク13aと、タンク13aに接続された配管13bと、配管13bに設けられたノズル13cと、ノズル13cを開閉し、所定の量の液体窒素をノズル13cから調整する調整装置13dと、を備える。液体窒素供給機13は、搬送装置18で搬送された缶胴111の口部121d上にノズル13cが配置されるか、又は、ノズル13cを缶胴111の口部121dから内部に挿入可能に、搬送された缶胴111の口部121dに対して移動する。液体窒素供給機13は、ノズル13cから所定量の液体窒素を缶胴111内に滴下する。なお、液体窒素供給機13は、空気雰囲気下において、液体窒素を供給する。 For example, the liquid nitrogen supply device 13 includes a tank 13a storing liquid nitrogen, a pipe 13b connected to the tank 13a, a nozzle 13c provided in the pipe 13b, and opening and closing the nozzle 13c to supply a predetermined amount of liquid nitrogen. from the nozzle 13c. The liquid nitrogen feeder 13 has a nozzle 13c disposed above the mouth 121d of the can body 111 transported by the transport device 18, or the nozzle 13c can be inserted into the can body 111 from the mouth 121d. It moves with respect to the mouth part 121d of the conveyed can body 111 . The liquid nitrogen supplier 13 drips a predetermined amount of liquid nitrogen into the can body 111 from the nozzle 13c. In addition, the liquid nitrogen supply machine 13 supplies liquid nitrogen in an air atmosphere.

液体窒素供給機13は、図4に示すように、一つのノズル13cから、複数回、所定の間隔を空けて缶胴111内に液体窒素を滴下する構成であってもよい。また、図5に示す他の例のように、液体窒素供給機13は、液体窒素を滴下する回数と同数のノズル13cを有する構成であってもよい。例えば、複数のノズル13cを有する液体窒素供給機13とする場合には、図5に示すように、1番目のノズル13cからN番目のノズルまで、順次搬送装置18で缶胴111を移動させ、各ノズル13cにおいて、液体窒素の滴下の間隔が所定の間隔となるように、それぞれ缶胴111に液体窒素を滴下させる。 As shown in FIG. 4, the liquid nitrogen supply device 13 may be configured to drip liquid nitrogen into the can body 111 from one nozzle 13c a plurality of times at predetermined intervals. Also, as in another example shown in FIG. 5, the liquid nitrogen supply device 13 may be configured to have the same number of nozzles 13c as the number of times the liquid nitrogen is dropped. For example, when the liquid nitrogen supply device 13 has a plurality of nozzles 13c, as shown in FIG. In each nozzle 13c, liquid nitrogen is dropped onto the can barrel 111 so that the interval between drops of the liquid nitrogen is a predetermined interval.

また、液体窒素供給機13の調整装置13dは、液体窒素の滴下が所定の量で所定の間隔となるように、液体窒素の滴下量及び滴下のタイミングを制御する。調整装置13dは、例えば、電磁弁等の開閉弁や制御装置等を含む。ここで、制御装置は、電磁弁の開閉を、プロセッサを含む処理回路によりプログラム等を実行して電磁弁を開閉制御する制御盤や制御端末であってもよく、また、スイッチやセンサ等によって予め決められた条件で開閉弁を開閉するシーケンサー等であってもよい。また、制御装置は、タンク13aから供給する液体窒素の流量や圧力を調整する装置であってもよい。 Further, the adjusting device 13d of the liquid nitrogen supply device 13 controls the amount of liquid nitrogen to be dropped and the timing of dropping so that the liquid nitrogen is dropped in a predetermined amount at predetermined intervals. The adjustment device 13d includes, for example, an on-off valve such as an electromagnetic valve, a control device, and the like. Here, the control device may be a control panel or a control terminal that controls opening and closing of the electromagnetic valve by executing a program or the like by a processing circuit including a processor. A sequencer or the like that opens and closes an on-off valve under predetermined conditions may be used. Also, the control device may be a device that adjusts the flow rate and pressure of the liquid nitrogen supplied from the tank 13a.

密封機14は、蓋112を缶胴111に被冠させて密封する。密封機14は、例えば、蓋112のスカート部112bに雌ネジ部112dを形成しながら、缶胴111の首部121cに巻締固着する。密封機14は、例えば、粉体102が充填され、液体窒素を所定の間隔で複数回滴下した缶胴111に蓋112を供給し、液体窒素の滴下終了後、所定の間隔を空けて、蓋112を缶胴111の首部121cに巻締固着する。なお、液体窒素滴下終了後から巻締固着を行う間隔は、1秒~60秒、より好ましくは2秒~30秒であり、複数回液体窒素を滴下するときの液体窒素の滴下の間隔と同じ範囲内に設定される。即ち、液体窒素供給機13による複数回の液体窒素の供給及び密封機14による密封は、所定の間隔で行う。 The sealing machine 14 caps the can body 111 with the lid 112 and seals the can body 111 . For example, the sealing machine 14 forms a female threaded portion 112d in the skirt portion 112b of the lid 112, and is secured to the neck portion 121c of the can body 111 by seaming. For example, the sealing machine 14 supplies the lid 112 to the can body 111 which is filled with the powder 102 and to which liquid nitrogen has been dropped multiple times at predetermined intervals. 112 is secured to the neck portion 121c of the can body 111 by seaming. The interval at which seaming and fixing is performed after the end of dropping liquid nitrogen is 1 second to 60 seconds, more preferably 2 seconds to 30 seconds, which is the same as the interval between drops of liquid nitrogen when dropping liquid nitrogen multiple times. set within the range. That is, the supply of liquid nitrogen by the liquid nitrogen supply device 13 and the sealing by the sealing device 14 are performed a plurality of times at predetermined intervals.

搬送装置18は、例えば、複数の缶胴111を収集した搬送元18aから缶胴111をリンサー11、粉体充填機12、液体窒素供給機13及び密封機14に順次搬送する。搬送装置18は、例えば、ローラやベルト等により形成されるコンベア等である。搬送装置18は、缶胴111の搬送元18aから、製造した粉体缶詰100の搬送先18cまで、各装置を通過する缶胴111(粉体缶詰100)の搬送ライン18bを構成する。また、搬送装置18は、密封機14において、缶胴111を密封する蓋112を搬送する構成をさらに含んでいてもよい。また、搬送装置18は、缶胴111を所定の速度や間隔で搬送してもよい。また、搬送装置18は、缶胴111を複数列で各装置構成に搬送する構成としてもよい。 The conveying device 18, for example, sequentially conveys the can bodies 111 from a conveying source 18a collecting the plurality of can bodies 111 to the rinser 11, the powder filling machine 12, the liquid nitrogen feeder 13, and the sealing machine . The conveying device 18 is, for example, a conveyor or the like formed of rollers, belts, or the like. The conveying device 18 constitutes a conveying line 18b of the can body 111 (powder canned food 100) passing through each device from a conveying source 18a of the can body 111 to a conveying destination 18c of the manufactured powdered canned food 100. Further, the conveying device 18 may further include a configuration for conveying the lid 112 that seals the can body 111 in the sealing machine 14 . Further, the conveying device 18 may convey the can body 111 at a predetermined speed or interval. Further, the conveying device 18 may be configured to convey the can bodies 111 in a plurality of rows to each device configuration.

(粉体缶詰100の製造方法)
次に、粉体缶詰100の製造方法を、図6に示す流れ図を用いて説明する。
(Manufacturing method of powder canned food 100)
Next, the manufacturing method of the powder canned food 100 will be described with reference to the flowchart shown in FIG.

まず、搬送装置18は、蓋112が密封されていない缶胴111を、口部121dが上となる姿勢でリンサー11に搬送する。リンサー11は、搬送装置18によって搬送された缶胴111を洗浄する(ステップST11)。 First, the conveying device 18 conveys the can body 111 with the unsealed lid 112 to the rinser 11 with the mouth portion 121d facing upward. The rinser 11 cleans the can body 111 transported by the transport device 18 (step ST11).

次に、搬送装置18は、リンサー11で洗浄された缶胴111を、粉体充填機12に搬送する。そして、粉体充填機12は、缶胴111に粉体102を充填する(ステップST12)。具体的には、粉体充填機12は、搬送された缶胴111に、粉体102を、所定の量だけ充填する。 Next, the conveying device 18 conveys the can body 111 washed by the rinser 11 to the powder filling machine 12 . Then, the powder filling machine 12 fills the can body 111 with the powder 102 (step ST12). Specifically, the powder filling machine 12 fills the conveyed can body 111 with a predetermined amount of powder 102 .

次に、搬送装置18は、粉体102が充填された缶胴111を、液体窒素供給機13に搬送する。そして、液体窒素供給機13は、缶胴111内に液体窒素を供給する(ステップST13)。具体例として、液体窒素供給機13は、1秒~60秒の間隔、より好ましくは、滴下の間隔を2秒~30秒の間隔で粉体102が充填された缶胴111の内部へ所定量の液体窒素を複数回滴下する。 Next, the conveying device 18 conveys the can body 111 filled with the powder 102 to the liquid nitrogen feeder 13 . Then, the liquid nitrogen supplier 13 supplies liquid nitrogen into the can body 111 (step ST13). As a specific example, the liquid nitrogen feeder 13 feeds a predetermined amount into the can body 111 filled with the powder 102 at intervals of 1 second to 60 seconds, more preferably at intervals of 2 seconds to 30 seconds. of liquid nitrogen is dropped several times.

次に、搬送装置18は、液体窒素が滴下された缶胴111を密封機14に搬送する。そして、密封機14は、缶胴111に蓋112を被冠させて、蓋112を巻締固着し、缶胴111を密封する(ステップST14)。なお、ステップST13において液体窒素の最後の滴下から所定の間隔として、1秒~60秒、より好ましくは、2秒~30秒で缶胴111を密封する。これらの工程により、粉体缶詰100が製造される。 Next, the conveying device 18 conveys the can body 111 onto which the liquid nitrogen has been dropped to the sealing machine 14 . Then, the sealing machine 14 caps the can body 111 with the lid 112 and seams the lid 112 to seal the can body 111 (step ST14). In step ST13, the can body 111 is sealed at a predetermined interval from the last drop of liquid nitrogen, 1 to 60 seconds, preferably 2 to 30 seconds. Powder canned food 100 is manufactured by these steps.

このように構成された粉体缶詰100は、金属容器101を金属容器とし、内圧を0.15MPa以下とし、開封前の密封された金属容器101内の残存する酸素濃度を5%以下とした。このため、粉体缶詰100は、粉体102が劣化することを抑制できる。例えば、粉体102が劣化する条件として、水分量、酸素、光が上げられる。しかしながら、粉体缶詰100は、液体窒素により、缶胴111内の圧力及び酸素濃度を制御する。よって、缶胴111内の空気が液体窒素によって窒素に置換されるときに、空気に加えて、空気に含まれる水分も缶胴111外へと排出される。これにより、粉体缶詰100は、金属容器101内に残存する酸素濃度を低下させること、及び、粉体缶詰100内の粉体102に含有される水分量を低下させることができる。また、金属容器101は、光を遮る。これらのことから、粉体缶詰100は、粉体102の劣化を抑制できる。 The powder can 100 configured as described above has a metal container 101 with an internal pressure of 0.15 MPa or less and a residual oxygen concentration of 5% or less in the sealed metal container 101 before opening. For this reason, the canned powder 100 can suppress deterioration of the powder 102 . For example, conditions for deterioration of the powder 102 include water content, oxygen, and light. However, the powder canned food 100 controls the pressure and oxygen concentration in the can body 111 with liquid nitrogen. Therefore, when the air in the can body 111 is replaced with nitrogen by the liquid nitrogen, the moisture contained in the air is discharged to the outside of the can body 111 in addition to the air. As a result, the canned powder 100 can reduce the concentration of oxygen remaining in the metal container 101 and the amount of moisture contained in the powder 102 in the canned powder 100 . Also, the metal container 101 blocks light. For these reasons, the canned powder 100 can suppress deterioration of the powder 102 .

また、金属容器101は、好ましい例として、口径/胴径比率を40~85%に設定される。これにより、粉体102が充填された粉体缶詰100のヘッドスペースの容量が小さくなる。また、粉体缶詰100の開封後に再封できる蓋112とすることで、再封時の金属容器101内の酸素濃度が増加することを抑制できる。また、内圧を0.15MPa以下とすることで、粉体缶詰100は、開封時に噴出するガスによって粉体102が吹き出すこと等の金属容器101の不具合を防止できる。 Further, the metal container 101 is preferably set to have a diameter/body diameter ratio of 40 to 85%. As a result, the volume of the head space of the canned powder 100 filled with the powder 102 is reduced. Further, by providing the lid 112 that can be resealed after the powder can 100 is opened, it is possible to suppress an increase in the oxygen concentration in the metal container 101 at the time of resealing. In addition, by setting the internal pressure to 0.15 MPa or less, the powder can 100 can prevent malfunctions of the metal container 101, such as blowing out of the powder 102 due to gas blowing out when the can is opened.

また、粉体缶詰100の製造装置1及び製造方法によれば、金属容器101に粉体102を充填後、所定の内圧となる液体窒素を複数回に分けて、所定の間隔で缶胴111に滴下させて、金属容器101を密封する。また、液体窒素の滴下の間隔及び液体窒素の滴下から密封までの間隔を1秒~60秒、好ましくは2秒~30秒とする。 Further, according to the manufacturing apparatus 1 and the manufacturing method of the powder canned food 100, after the metal container 101 is filled with the powder 102, liquid nitrogen having a predetermined internal pressure is applied to the can body 111 at predetermined intervals. The metal container 101 is sealed by dripping. Also, the interval between dropping the liquid nitrogen and the interval between dropping the liquid nitrogen and sealing is set to 1 second to 60 seconds, preferably 2 seconds to 30 seconds.

これは、滴下された液体窒素が気化して空気と置換するのに要する時間が確保され、置換の効率が向上するためである。また、滴下の間隔及び滴下から密封までの間隔が1秒未満では、液体窒素が気化しきれず、置換の効率が低下するとともに、内圧の管理が難しくなる虞があるためである。また、滴下の間隔及び滴下から密封までの間隔が60秒より長いと、気化した窒素が容器の外に出てしまい、空気が缶胴111内に入り込むことにより、残存酸素量が増加し、置換の効率が低下するためである。 This is because the time required for the dropped liquid nitrogen to evaporate and replace the air is ensured, and the replacement efficiency is improved. Also, if the interval between dropping and the interval between dropping and sealing is less than 1 second, the liquid nitrogen will not be completely vaporized, reducing the replacement efficiency and possibly making it difficult to control the internal pressure. Further, if the interval between drops and the interval from dropping to sealing is longer than 60 seconds, vaporized nitrogen will come out of the container, and air will enter the can body 111, thereby increasing the amount of residual oxygen and replacing the remaining oxygen. This is because the efficiency of

このように、液体窒素の複数回の滴下及び密封の間隔を所定の間隔とすることで、缶胴111内の窒素置換を効率よく行うことができるため、金属容器101内圧の管理が容易となるとともに、金属容器101内に残存する酸素濃度を効果的に低下させることができる。 In this way, by setting the interval between multiple drops of liquid nitrogen and sealing to a predetermined interval, nitrogen replacement in the can body 111 can be performed efficiently, so that the internal pressure of the metal container 101 can be easily managed. At the same time, the concentration of oxygen remaining in the metal container 101 can be effectively reduced.

即ち、所定の間隔を空けて複数回液体窒素を滴下させることで、液体窒素が気化することによる内部の酸素を含む空気の缶胴111からの排出が効果的に行われるためである。 That is, by dropping the liquid nitrogen a plurality of times at predetermined intervals, the internal air containing oxygen due to the vaporization of the liquid nitrogen is effectively discharged from the can body 111 .

具体的に説明すると、1回の滴下で液体窒素を供給する場合には、液体窒素の滴下量が複数回に比べて多くなり、液体窒素が気化するまでの時間が長くなり、また、気化する迄の時間のバラツキが大きくなる。液体窒素の気化が完了するまえに蓋112で缶胴111を密封すると、密封後に金属容器101内で液体窒素が気化し、内圧が高くなるおそれがある。液体窒素の気化が完了してから時間を空けて蓋112で缶胴111を密封すると、空気(酸素)が缶胴111内に浸入し、残存する酸素濃度が増加する虞がある。よって、1回の滴下で液体窒素を供給する場合には、製造した粉体缶詰の内圧及び残存酸素量のバラツキが大きくなる虞がある。 Specifically, when liquid nitrogen is supplied by one drop, the amount of liquid nitrogen dropped is greater than when it is dropped multiple times, and the time until the liquid nitrogen evaporates becomes longer. The variation in the time up to this point becomes large. If the can body 111 is sealed with the lid 112 before the vaporization of the liquid nitrogen is completed, the liquid nitrogen may vaporize in the metal container 101 after sealing and the internal pressure may increase. If the lid 112 seals the can body 111 with the lid 112 after the vaporization of the liquid nitrogen is completed, air (oxygen) may enter the can body 111 and the remaining oxygen concentration may increase. Therefore, when liquid nitrogen is supplied by one drop, there is a risk that the internal pressure and residual oxygen content of the manufactured powder cans will vary greatly.

しかしながら、実施形態の製造装置1及び製造方法のように、複数回に分けて液体窒素を滴下し、且つ、滴下の間隔及び滴下から密封までの間隔を調整することで、内圧及び残存する酸素濃度を管理することが容易となる。このため、内圧の管理を容易とすることで、金属容器101の不具合が生じることを抑制できる。また、酸素濃度の管理を容易とすることで、金属容器101内に充填された粉体102の劣化を抑制できる。 However, as in the manufacturing apparatus 1 and the manufacturing method of the embodiment, by dropping liquid nitrogen in a plurality of times and adjusting the interval between dropping and the interval from dropping to sealing, the internal pressure and the remaining oxygen concentration management becomes easier. Therefore, by facilitating the management of the internal pressure, it is possible to suppress the occurrence of defects in the metal container 101 . Further, by facilitating control of the oxygen concentration, deterioration of the powder 102 filled in the metal container 101 can be suppressed.

(粉体缶詰100の評価試験)
次に、粉体缶詰100の評価試験を、図7乃至図11を用いて説明する。
評価試験として、滴下回数による内圧及び酸素濃度の関係を評価する第1評価試験、容器形状による水分量変化の関係を評価する第2評価試験、及び、総滴下量を同じとして、滴下回数の違いによる内圧及び酸素濃度の関係を評価する第3評価試験を行った。なお、液体窒素の性質上、液体窒素供給機13から吐出(滴下)する狙い値よりも、液体窒素供給機13から実際に吐出された量及び/又は実際に金属容器101内に供給された量が少なくなることがある。以下の各評価試験において示す液体窒素の総滴下量及び滴下量の例は、狙い値を用いて説明する。
(Evaluation test of canned powder 100)
Next, an evaluation test of the powder canned food 100 will be described with reference to FIGS. 7 to 11. FIG.
As evaluation tests, the first evaluation test evaluates the relationship between the internal pressure and oxygen concentration depending on the number of times of dropping, the second evaluation test evaluates the relationship of the change in water content depending on the container shape, and the total amount of drops is the same, but the number of drops is different. A third evaluation test was conducted to evaluate the relationship between the internal pressure and the oxygen concentration. Due to the properties of liquid nitrogen, the amount actually discharged from the liquid nitrogen supply device 13 and/or the amount actually supplied into the metal container 101 is higher than the target value for discharging (dropping) from the liquid nitrogen supply device 13. may be less. Examples of the total drop amount and drop amount of liquid nitrogen shown in the following evaluation tests will be described using target values.

(第1評価試験)
第1評価試験として、以下の第1の実施例乃至第3の実施例の粉体缶詰100、並びに、第1の比較例及び第2の比較例の粉体缶詰に、それぞれ液体窒素を滴下し、内圧及び酸素濃度を測定し、平均内圧及び平均酸素濃度を求めた。なお、第1の実施例乃至第3の実施例、第1の比較例及び第2の比較例ともに、粉体缶詰100に充填した粉体102は、インスタントコーヒーであるインスタントコーヒー顆粒を用いた。インスタントコーヒー顆粒の平均粒子径は、約2.7mmであった。
(First evaluation test)
As a first evaluation test, liquid nitrogen was dropped into the powder cans 100 of the following first to third examples and the powder cans of the first and second comparative examples. , the internal pressure and the oxygen concentration were measured, and the average internal pressure and the average oxygen concentration were obtained. Note that instant coffee granules, which are instant coffee, were used as the powder 102 filled in the powder canned food 100 in both the first to third examples, the first comparative example, and the second comparative example. The average particle size of the instant coffee granules was about 2.7 mm.

(第1の実施例)
第1の実施例として、金属容器101は、口径φ28mm、胴径φ65mm、容量300mlの再封可能なニューボトル缶(大和製罐株式会社製)を用いた。金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を4秒としてサンプルを3缶作成した。
(First embodiment)
As a first example, a resealable new bottle can (manufactured by Yamato Seikan Co., Ltd.) having a diameter of φ28 mm, a barrel diameter of φ65 mm, and a capacity of 300 ml was used as the metal container 101 . A metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 4 seconds.

(第2の実施例)
第2の実施例として、金属容器101は、第1の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を10秒としてサンプルを3缶作成した。
(Second embodiment)
As a second embodiment, the metal container 101 is the same new bottle can as in the first embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 10 seconds.

(第3の実施例)
第3の実施例として、金属容器101は、第1の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を30秒としてサンプルを3缶作成した。
(Third embodiment)
As a third embodiment, the metal container 101 is the same new bottle can as in the first embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 30 seconds.

(第1の比較例)
第1の比較例として、各実施例及び第1の比較例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を0.88gで、滴下回数を2回とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を4秒としてサンプルを3缶作成した。また、第1の比較例における液体窒素の1回当たりの滴下量は、第1の実施例乃至第3の実施例における液体窒素の1回当たりの滴下量と同じとした。
(First comparative example)
As a first comparative example, the same new bottle can as used in each of the examples and the first comparative example was used. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 0.88 g, and the number of drops was two. Three samples were prepared with the first waiting time after the first drop of liquid nitrogen being 4 seconds and the second waiting time until the lid 112 was seamed after the second drop of liquid nitrogen was 4 seconds. Also, the amount of liquid nitrogen dropped per time in the first comparative example was the same as the amount of liquid nitrogen dropped per time in the first to third embodiments.

(第2の比較例)
第2の比較例として、各実施例及び第1の比較例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を0.88gで、滴下回数を2回とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を10秒としてサンプルを3缶作成した。また、第2の比較例における液体窒素の1回当たりの滴下量は、第1の実施例乃至第3の実施例における液体窒素の1回当たりの滴下量と同じとした。
(Second comparative example)
As a second comparative example, the same new bottle can as used in each of the examples and the first comparative example was used. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 0.88 g, and the number of drops was two. Three samples were prepared with the first waiting time after the first drop of liquid nitrogen being 4 seconds and the second waiting time until the lid 112 being seamed after the second drop of liquid nitrogen being 10 seconds. Also, the amount of liquid nitrogen dropped per time in the second comparative example was the same as the amount of liquid nitrogen dropped per time in the first to third embodiments.

(第3の比較例)
第3の比較例として、各実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を0.88gで、滴下回数を2回とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を30秒としてサンプルを3缶作成した。また、第3の比較例における液体窒素の1回当たりの滴下量は、第1の実施例乃至第3の実施例における液体窒素の1回当たりの滴下量と同じとした。
(Third comparative example)
As a third comparative example, the same new bottle can as in each example was used. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 0.88 g, and the number of drops was two. Three samples were prepared by setting the first standby time after the first drop of liquid nitrogen to 4 seconds and the second standby time to the seam tightening of the lid 112 after the second drop of liquid nitrogen to 30 seconds. Also, the amount of liquid nitrogen dropped per time in the third comparative example was the same as the amount of liquid nitrogen dropped per time in the first to third embodiments.

(第4の比較例)
第4の比較例として、各実施例及び第1の比較例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を0.96gで、滴下回数を2回とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を4秒としてサンプルを3缶作成した。なお、第4の比較例における液体窒素の総滴下量が、第1の比較例乃至第3の比較例における液体窒素の総滴下量よりも多いことから、第4の比較例における液体窒素の1回当たりの滴下量は、第1の実施例乃至第3の実施例における液体窒素の1回当たりの滴下量よりも多い。
(Fourth comparative example)
As a fourth comparative example, the same new bottle can as used in each of the examples and the first comparative example was used. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 0.96 g, and the number of drops was two. Three samples were prepared with the first waiting time after the first drop of liquid nitrogen being 4 seconds and the second waiting time until the lid 112 was seamed after the second drop of liquid nitrogen was 4 seconds. In addition, since the total amount of liquid nitrogen dropped in the fourth comparative example is larger than the total amount of liquid nitrogen dropped in the first to third comparative examples, 1 of the liquid nitrogen in the fourth comparative example The amount of liquid nitrogen dropped per time is larger than the amount of liquid nitrogen dropped per time in the first to third embodiments.

(第1評価試験の結果)
第1の評価試験の結果を図7及び図8に示す。図7に示すように、第1の実施例乃至第3の実施例ともに、実施例のサンプルでは、いずれも内圧が0.15MPa以下であり、平均酸素濃度が5%以下に抑えられていた。これに対し、図8に示すように、第1の比較例乃至第4の比較例では、内圧は0.15MPa以下となっているものの、酸素濃度はいずれも5%を超えている。
(Results of the first evaluation test)
The results of the first evaluation test are shown in FIGS. 7 and 8. FIG. As shown in FIG. 7, the samples of Examples 1 to 3 had an internal pressure of 0.15 MPa or less and an average oxygen concentration of 5% or less. On the other hand, as shown in FIG. 8, in the first to fourth comparative examples, the internal pressure is 0.15 MPa or less, but the oxygen concentration exceeds 5%.

また、第3の実施例及び第1の比較例においては、平均内圧の差が0.01MPaであったものの、平均酸素濃度が1.7%異なった。また、各実施例及び各比較例ともに、待機時間を長くすることで、内圧が低下した。これらのことからも、液体窒素の滴下数が少ないと、総滴下量が小さくても、内圧が増加傾向にあると解る。また、液体窒素滴下後の待機時間が長くなると、内圧が減少傾向にあると解る。即ち、総滴下量を調整するだけでなく、滴下数及び待機時間の設定により、内圧及び酸素濃度を調整することができることが明らかとなった。 Further, in the third example and the first comparative example, although the difference in average internal pressure was 0.01 MPa, the average oxygen concentration differed by 1.7%. Further, in both Examples and Comparative Examples, the internal pressure decreased by lengthening the standby time. From these facts, it can be understood that when the number of drops of liquid nitrogen is small, the internal pressure tends to increase even if the total amount of drops is small. Also, it can be seen that the internal pressure tends to decrease as the waiting time after dropping the liquid nitrogen becomes longer. In other words, it was found that the internal pressure and the oxygen concentration can be adjusted not only by adjusting the total drip amount, but also by setting the number of drips and the standby time.

また、第1の実施例のように4秒間隔で3回滴下及び密封を行った場合には、酸素濃度の最小値(4.4%、n=1)及び最大値(4.6%、n=3)の差が0.2%であったのに対し、第3の比較例のように4秒間隔で2回滴下及び密封を行った場合には、酸素濃度の最小値(7.1%、n=2)及び最大値(8.3%、n=3)の差が1.2%であった。これらの結果から、液体窒素の滴下回数が多いほど、酸素濃度のばらつきが減少することが解った。このため、滴下回数は、複数回であれば、内圧及び酸素濃度の管理が容易となることがわかり、さらに、好ましくは、3回以上液体窒素を滴下したほうが、より、内圧及び酸素濃度の管理が容易となることが解った。 Also, when dripping and sealing were performed three times at intervals of 4 seconds as in the first example, the minimum value (4.4%, n = 1) and the maximum value (4.6%, n = 3), the difference was 0.2%, whereas the minimum value of oxygen concentration (7. 1%, n=2) and the maximum value (8.3%, n=3) was 1.2%. From these results, it was found that the greater the number of drops of liquid nitrogen, the less the variation in oxygen concentration. For this reason, it is found that the internal pressure and oxygen concentration can be easily controlled if the number of times of dropping is plural times, and more preferably, the internal pressure and oxygen concentration can be managed more easily by dropping the liquid nitrogen three times or more. was found to be easier.

なお、第1の評価試験において、第1の実施例乃至第2の実施例3と比較する比較例(第1の比較例及び第2の比較例)として液体窒素の滴下を2回行う例を用いて説明したが、2回の液体窒素の滴下を発明から除外するものではなく、2回の液体窒素の滴下であっても、供給する液体窒素の量等によって、内圧及び酸素濃度を所望の値とすることができることは勿論である。 In the first evaluation test, as a comparative example (first comparative example and second comparative example) to be compared with the first to second examples 3, an example in which liquid nitrogen was dropped twice was used. However, the two drops of liquid nitrogen are not excluded from the invention. Of course, it can be set as a value.

(第2評価試験)
第2評価試験として、以下の第4の実施例乃至第7の実施例の粉体缶詰100、並びに、第5の比較例及び第8の比較例の粉体瓶詰を開封し、インスタントコーヒー顆粒の水分量変化を評価した。なお、第4の実施例及び第5の実施例の条件、第6の実施例及び第7の実施例の条件、第5の比較例及び第6の比較例の条件、並びに、第7の比較例及び第8の比較例の条件は同じとし、各条件において二回測定した結果から平均湿量基準水分(%)を求めた。
(Second evaluation test)
As a second evaluation test, the powder cans 100 of the following fourth to seventh examples and the powder bottles of the fifth and eighth comparative examples were opened and instant coffee granules were prepared. Moisture content change was evaluated. The conditions of the fourth and fifth examples, the conditions of the sixth and seventh examples, the conditions of the fifth and sixth comparative examples, and the seventh comparison The conditions of the example and the eighth comparative example were the same, and the average wet standard moisture content (%) was determined from the results of two measurements under each condition.

第4の実施例乃至第7の実施例の粉体缶詰100、並びに、第5の比較例及び第8の比較例の粉体瓶詰ともに、粉体102は、インスタントコーヒーであるインスタントコーヒー顆粒を用いた。インスタントコーヒー顆粒の平均粒子径は、約2.7mmであった。 Instant coffee granules, which are instant coffee, are used as the powder 102 in both the canned powder 100 of the fourth to seventh examples and the bottled powder of the fifth and eighth comparative examples. board. The average particle size of the instant coffee granules was about 2.7 mm.

第4の実施例乃至第7の実施例の粉体缶詰100においては、金属容器101に粉体102を充填し、週二回、蓋112を缶胴111から取り外し、30秒の間静置し、その後、蓋112を再封し、約2ヶ月後に、インスタントコーヒー顆粒の湿量基準水分(%)を求めた。 In the powder canned food 100 of the fourth to seventh embodiments, the metal container 101 is filled with the powder 102, and the lid 112 is removed from the can body 111 twice a week, and left to stand for 30 seconds. After that, the lid 112 was resealed, and after about two months, the wet base moisture content (%) of the instant coffee granules was determined.

第5の比較例乃至第8の比較例は、第4の実施例乃至第7の実施例の粉体缶詰100と同じ粉体102である、一般的に販売されているインスタントコーヒー顆粒が充填された蓋付きの瓶詰を購入して開封し、週二回、蓋を瓶から取り外し、30秒の間静置し、その後、蓋を再封し、約2ヶ月後に、インスタントコーヒー顆粒の未乾燥質量(g)、乾燥質量(g)を2回測定し、各回の湿量基準水分(%)及び平均値を求めた。 The fifth to eighth comparative examples are filled with commonly available instant coffee granules, which are the same powder 102 as the canned powder 100 of the fourth to seventh examples. A jar with a lid was purchased and opened, and twice weekly, the lid was removed from the jar, allowed to sit for 30 seconds, then resealed, and after approximately 2 months, the wet mass of instant coffee granules was measured. (g) and dry mass (g) were measured twice, and the wet standard moisture content (%) and the average value were determined for each time.

なお、ここで、未乾燥質量(g)とは、乾燥前の水分を含む粉体102(インスタントコーヒー顆粒)の質量である。乾燥質量(g)とは、乾燥後の水分を含まない粉体102(インスタントコーヒー顆粒)の質量である。湿量基準水分(%)とは、乾燥により粉体102から飛ばした水分の質量を未乾燥質量で除した値である。ここで乾燥により粉体102から飛ばした(除去された)水分の質量は、未乾燥質量から乾燥質量を減じた値である。 Here, the undried mass (g) is the mass of the powder 102 (instant coffee granules) containing moisture before drying. The dry mass (g) is the mass of the powder 102 (instant coffee granules) that does not contain moisture after drying. The wet standard moisture content (%) is a value obtained by dividing the mass of moisture removed from the powder 102 by drying by the undried mass. Here, the mass of moisture blown (removed) from the powder 102 by drying is a value obtained by subtracting the dry mass from the undried mass.

なお、開封時の温度は30.1℃であり、湿度は34.9%であった。開封時から約2ヶ月後に未乾燥質量(g)、乾燥質量(g)を測定したときの温度は28.4℃であり、湿度は46.6%であった。 The temperature at the time of opening was 30.1° C., and the humidity was 34.9%. About two months after opening, the undried mass (g) and the dry mass (g) were measured, and the temperature was 28.4°C and the humidity was 46.6%.

また、第4の実施例乃至第7の実施例の粉体缶詰100及び第5の比較例及び第8の比較例の粉体瓶詰を室内保存したときの保管場所を同じとし、室内の窓際に載置して保管した。 In addition, when the powder canned food 100 of the fourth to seventh examples and the powder bottled food of the fifth and eighth comparative examples were stored indoors, the storage place was the same, and by the window in the room Placed and stored.

(第4の実施例及び第5の実施例)
第4の実施例として、金属容器101は、口径φ43mm、胴径φ52mm、容量170mlの再封可能なWORC缶(大和製罐株式会社製)を用いた。金属容器101に、インスタントコーヒー顆粒を40g(164ml)充填し、液体窒素の滴下量を0.48gで、滴下回数を2回とした。また、1回の滴下当たりの滴下量は2回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒とし、2回液体窒素の滴下後の待機時間を4秒とし、液体窒素を滴下後、蓋112で再封した粉体缶詰100を室内保存した。
(Fourth embodiment and fifth embodiment)
As a fourth example, a resealable WORC can (manufactured by Yamato Seikan Co., Ltd.) having a diameter of φ43 mm, a barrel diameter of φ52 mm, and a capacity of 170 ml was used as the metal container 101 . A metal container 101 was filled with 40 g (164 ml) of instant coffee granules, and the amount of liquid nitrogen dropped was 0.48 g, and the number of drops was two. In addition, the amount of each drop was the same for both of the two times. The first standby time after the first drop of liquid nitrogen was set to 4 seconds, the standby time after the second drop of liquid nitrogen was set to 4 seconds, and after the liquid nitrogen was dropped, the powder can 100 resealed with the lid 112 was resealed. Stored indoors.

(第6の実施例及び第7の実施例)
第6の実施例として、金属容器101は、口径φ28mm、胴径φ66mm、容量300mlの再封可能なニューボトル缶(大和製罐株式会社製)を用いた。金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の滴下量を0.9gで、滴下回数を1回とした。液体窒素の滴下後の待機時間を4秒とし、液体窒素の滴下後、蓋112で再封した粉体缶詰100を室内保存した。
(Sixth embodiment and seventh embodiment)
As a sixth example, the metal container 101 used was a resealable new bottle can (manufactured by Yamato Seikan Co., Ltd.) having a diameter of φ28 mm, a barrel diameter of φ66 mm, and a capacity of 300 ml. A metal container 101 was filled with 70 g (257 ml) of instant coffee granules, and the amount of liquid nitrogen dropped was 0.9 g, and the number of drops was 1. After the liquid nitrogen was dropped, the waiting time was set to 4 seconds, and after the liquid nitrogen was dropped, the powder can 100 resealed with the lid 112 was stored indoors.

(第5の比較例及び第6の比較例)
第5の比較例及び第6の比較例として、購入して開封した粉体瓶詰のインスタントコーヒー顆粒を40gとし、蓋を再封した粉体瓶詰めを室内保存した。
(Fifth Comparative Example and Sixth Comparative Example)
As a fifth comparative example and a sixth comparative example, 40 g of instant coffee granules were purchased and opened in a powder bottle, and the powder bottle was resealed and stored indoors.

(第7の比較例及び第8の比較例)
第7の比較例及び第8の比較例として、購入して開封した粉体瓶詰のインスタントコーヒー顆粒を70gとし、蓋を再封した粉体瓶詰めを室内保存した。なお、第7の比較例及び第8の比較例の粉体瓶詰の瓶は、第5の比較例及び第6の比較例の粉体瓶詰の瓶よりも大きい。
(Seventh Comparative Example and Eighth Comparative Example)
As a seventh comparative example and an eighth comparative example, 70 g of instant coffee granules were purchased and opened in a powder bottle, and the powder bottle was resealed and stored indoors. The powder bottles of the seventh and eighth comparative examples are larger than the powder bottles of the fifth and sixth comparative examples.

(第2評価試験の結果)
第2の評価試験の結果を、図9乃至図11に示す。図9に、第4の実施例乃至第7の実施例の粉体缶詰100の粉体102であるインスタントコーヒー顆粒の未乾燥質量(g)、乾燥質量(g)、湿量基準水分(%)、を示す。図10に、第5の比較例乃至第8の比較例の粉体瓶詰の粉体であるインスタントコーヒー顆粒の未乾燥質量(g)、乾燥質量(g)、湿量基準水分(%)を示す。また、図11に、第5の比較例及び第6の比較例から求めた平均湿量基準水分、第7の比較例及び第8の比較例から求めた平均湿量基準水分、第4の実施例及び第5の実施例から求めた平均湿量基準水分、並びに、第6の実施例及び第7の実施例から求めた平均湿量基準水分をそれぞれ示す。
(Results of the second evaluation test)
Results of the second evaluation test are shown in FIGS. 9 to 11. FIG. FIG. 9 shows the undried mass (g), dry mass (g), and wet standard moisture (%) of instant coffee granules, which are the powder 102 of the powder canned food 100 of the fourth to seventh examples. , indicates. FIG. 10 shows the undried mass (g), dry mass (g), and wet standard moisture content (%) of instant coffee granules, which are the powder bottled in the powder bottles of the fifth to eighth comparative examples. . In addition, FIG. 11 shows the average wet standard moisture obtained from the fifth comparative example and the sixth comparative example, the average wet standard moisture obtained from the seventh comparative example and the eighth comparative example, and the fourth embodiment. The average wet standard moisture determined from the example and the fifth example, and the average wet standard moisture determined from the sixth and seventh examples are shown, respectively.

図9乃至図11に示すように、第4の実施例乃至第7の実施例においては、第5の比較例及び第8の比較例よりも、湿量基準水分が小さい値となった。これは、液体窒素を滴下し、缶胴111内の空気が窒素に置換されたときに、空気に含まれる水分も併せて排出されたためと考えられる。よって、第5の比較例及び第8の比較例と同じインスタントコーヒー顆粒を用いても、第4の実施例乃至第7の実施例のように、液体窒素を滴下することで、インスタントコーヒー顆粒の水分を低減できることが解る。 As shown in FIGS. 9 to 11, in the fourth to seventh examples, the standard wet moisture values were smaller than those in the fifth and eighth comparative examples. This is presumably because liquid nitrogen was dripped and when the air in the can barrel 111 was replaced with nitrogen, the moisture contained in the air was also discharged. Therefore, even if the same instant coffee granules as in the fifth and eighth comparative examples are used, the instant coffee granules can be obtained by dropping liquid nitrogen as in the fourth to seventh examples. It turns out that water content can be reduced.

また、第5の比較例及び第8の比較例は、開封時に比べて、約2ヵ月後における湿量基準水分が増加していた。これに対し、第4の実施例乃至第7の実施例は、約2ヵ月後における湿量基準水分が、5%未満であり、平均値は、全てにおいて5%未満であった。これらのことからも、金属容器101の口径/胴径比率を40~85%とすることで、ヘッドスペースを小さくすることができ、粉体缶詰100の開封後も蓋112により缶胴111を再封することで、粉体102の水分量が増加することを抑制できることが解った。 Also, in the fifth comparative example and the eighth comparative example, the standard wet moisture content increased after about two months compared to the time of opening. In contrast, in Examples 4 to 7, the wet standard moisture content after about two months was less than 5%, and the average value was all less than 5%. From these facts, the head space can be reduced by setting the diameter/body diameter ratio of the metal container 101 to 40 to 85%, and the can body 111 can be reused with the lid 112 even after the powder can 100 is opened. It has been found that sealing can suppress an increase in the moisture content of the powder 102 .

(第3評価試験)
第3評価試験として、以下の第8の実施例乃至第13の実施例の粉体缶詰100、並びに、第9の比較例及び第11の比較例の粉体缶詰に、それぞれ総滴下量を同じとして、異なる滴下数で液体窒素を滴下し、内圧及び酸素濃度を測定し、平均内圧及び平均酸素濃度を求めた。また、各実施例及び各比較例において、サンプル数を三(3缶)とし、酸素濃度のバラツキの幅(=酸素濃度の最大値-酸素濃度の最小値)を求めた。
(Third evaluation test)
As a third evaluation test, the same total drip amount was applied to the powder cans 100 of the following eighth to thirteenth examples, and the powder cans of the ninth and eleventh comparative examples. , liquid nitrogen was dropped at different dropping numbers, the internal pressure and oxygen concentration were measured, and the average internal pressure and average oxygen concentration were obtained. In addition, in each example and each comparative example, the number of samples was set to three (three cans), and the width of variation in oxygen concentration (=maximum value of oxygen concentration−minimum value of oxygen concentration) was determined.

(第8の実施例)
第8の実施例として、金属容器101は、口径φ28mm、胴径φ65mm、容量300mlの再封可能なニューボトル缶(大和製罐株式会社製)を用いた。金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を2回とした。また、1回の滴下当たりの滴下量は2回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を4秒としてサンプルを3缶作成した。
(Eighth embodiment)
As an eighth embodiment, a resealable new bottle can (manufactured by Yamato Seikan Co., Ltd.) having a diameter of φ28 mm, a barrel diameter of φ65 mm, and a capacity of 300 ml was used as the metal container 101 . A metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was two. In addition, the amount of each drop was the same for both of the two times. Three samples were prepared with the first waiting time after the first drop of liquid nitrogen being 4 seconds and the second waiting time until the lid 112 was seamed after the second drop of liquid nitrogen was 4 seconds.

(第9の実施例)
第9の実施例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を2回とした。また、1回の滴下当たりの滴下量は2回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を10秒としてサンプルを3缶作成した。
(Ninth embodiment)
In the ninth embodiment, the metal container 101 is the same new bottle can as in the eighth embodiment. A metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was two. In addition, the amount of each drop was the same for both of the two times. Three samples were prepared with the first waiting time after the first drop of liquid nitrogen being 4 seconds and the second waiting time until the lid 112 being seamed after the second drop of liquid nitrogen being 10 seconds.

(第10の実施例)
第10の実施例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を2回とした。また、1回の滴下当たりの滴下量は2回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後、蓋112の巻締までの2回目待機時間を30秒としてサンプルを3缶作成した。
(Tenth embodiment)
In the tenth embodiment, the metal container 101 is the same new bottle can as in the eighth embodiment. A metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was two. In addition, the amount of each drop was the same for both of the two times. Three samples were prepared by setting the first standby time after the first drop of liquid nitrogen to 4 seconds and the second standby time to the seam tightening of the lid 112 after the second drop of liquid nitrogen to 30 seconds.

(第11の実施例)
第11の実施例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を4秒としてサンプルを3缶作成した。
(Eleventh embodiment)
In the eleventh embodiment, the metal container 101 is the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 4 seconds.

(第12の実施例)
第12の実施例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を10秒としてサンプルを3缶作成した。
(Twelfth embodiment)
In the twelfth embodiment, the metal container 101 is the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 10 seconds.

(第13の実施例)
第13の実施例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の総滴下量を1.32gで、滴下回数を3回とした。また、1回の滴下当たりの滴下量は3回共に同じ量とした。1回目の液体窒素の滴下後の1回目待機時間を4秒、2回目の液体窒素の滴下後の2回目待機時間を4秒、3回目の滴下後、蓋112の巻締までの3回目待機時間を30秒としてサンプルを3缶作成した。
(Thirteenth embodiment)
In the thirteenth embodiment, the metal container 101 is the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the total amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 3. Also, the amount of each drop was the same for all three times. The first standby time after the first drop of liquid nitrogen is 4 seconds, the second standby time after the second drop of liquid nitrogen is 4 seconds, and the third wait until the lid 112 is tightened after the third drop. Three cans of samples were prepared with a time of 30 seconds.

(第9の比較例)
第9の比較例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の滴下量を1.32gで滴下回数を1回とした。液体窒素の滴下後、蓋112の巻締までの待機時間を4秒としてサンプルを3缶作成した。
(9th comparative example)
As a ninth comparative example, the metal container 101 used was the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 1. After dropping the liquid nitrogen, three cans of samples were prepared with a standby time of 4 seconds until the lid 112 was seamed.

(第10の比較例)
第10の比較例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の滴下量を1.32gで滴下回数を1回とした。液体窒素の滴下後、蓋112の巻締までの待機時間を10秒としてサンプルを3缶作成した。
(Tenth comparative example)
As a tenth comparative example, the metal container 101 used was the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 1. After dropping the liquid nitrogen, three cans of samples were prepared with a waiting time of 10 seconds until the lid 112 was seamed.

(第11の比較例)
第11の比較例として、金属容器101は、第8の実施例と同じニューボトル缶を用いた。また、金属容器101に、インスタントコーヒー顆粒を70g(257ml)充填し、液体窒素の滴下量を1.32gで滴下回数を1回とした。液体窒素の滴下後、蓋112の巻締までの待機時間を30秒としてサンプルを3缶作成した。
(Eleventh comparative example)
As an eleventh comparative example, the metal container 101 used was the same new bottle can as in the eighth embodiment. Also, the metal container 101 was filled with 70 g (257 ml) of instant coffee granules, the amount of liquid nitrogen dropped was 1.32 g, and the number of drops was 1. After dropping the liquid nitrogen, three cans of samples were prepared with a waiting time of 30 seconds until the lid 112 was seamed.

(第3評価試験の結果)
第3の評価試験の結果を図12及び図13に示す。図13に示す第9の比較例乃至第11の比較例に比べて、図12に示すように、2回液体窒素を滴下した第8の実施例乃至第10の実施例、並びに、3回液体窒素を滴下した第11の実施例乃至第13の実施例ともに、内圧が低くなる傾向にあった。また、2回液体窒素を滴下した第8の実施例乃至第10の実施例に比べて、3回液体窒素を滴下した第11の実施例乃至第13の実施例において、より内圧が低くなる傾向にあった。これにより、液体窒素の総滴下量が同じであっても、滴下数が増えることで、内圧が低くなることが解る。また、第9の比較例乃至第11の比較例、2回液体窒素を滴下した第8の実施例乃至第10の実施例、並びに、3回液体窒素を滴下した第11の実施例乃至第13の実施例のいずれにおいても、液体窒素滴下後の待機時間が長くなるにつれて、内圧が低下する傾向にあった。
(Results of the third evaluation test)
The results of the third evaluation test are shown in FIGS. 12 and 13. FIG. Compared to the ninth to eleventh comparative examples shown in FIG. 13, as shown in FIG. In all of the eleventh to thirteenth examples in which nitrogen was dripped, the internal pressure tended to decrease. In addition, the internal pressure tends to be lower in the eleventh to thirteenth embodiments in which liquid nitrogen is dropped three times than in the eighth to tenth embodiments in which liquid nitrogen is dropped twice. was in From this, it can be seen that even if the total amount of liquid nitrogen dropped is the same, the internal pressure decreases as the number of drops increases. Further, the ninth to eleventh comparative examples, the eighth to tenth examples in which liquid nitrogen is dropped twice, and the eleventh to thirteenth examples in which liquid nitrogen is dropped three times 1, the internal pressure tended to decrease as the waiting time after dropping the liquid nitrogen became longer.

図13に示す第9の比較例乃至第11の比較例に比べて、図12に示すように、2回液体窒素を滴下した第8の実施例乃至第10の実施例、並びに、3回液体窒素を滴下した第11の実施例乃至第13の実施例ともに、酸素濃度が高くなる傾向にあった。また、2回液体窒素を滴下した第8の実施例乃至第10の実施例に比べて、3回液体窒素を滴下した第11の実施例乃至第13の実施例において、より酸素濃度が高くなる傾向にあった。これにより、液体窒素総滴下量が同じであっても、滴下数が増えることで、酸素濃度が高くなることが解る。また、第9の比較例乃至第11の比較例、2回液体窒素を滴下した第8の実施例乃至第10の実施例、並びに、3回液体窒素を滴下した第11の実施例乃至第13の実施例のいずれにおいても、液体窒素滴下後の待機時間が長くなるにつれて、酸素濃度が高くなる傾向にあった。 Compared to the ninth to eleventh comparative examples shown in FIG. 13, as shown in FIG. In all of the eleventh to thirteenth examples in which nitrogen was dropped, the oxygen concentration tended to increase. Further, the oxygen concentration is higher in the eleventh to thirteenth embodiments in which liquid nitrogen is dropped three times than in the eighth to tenth embodiments in which liquid nitrogen is dropped twice. tended to. From this, it can be seen that even if the total amount of liquid nitrogen dropped is the same, the oxygen concentration increases as the number of dropped drops increases. Further, the ninth to eleventh comparative examples, the eighth to tenth examples in which liquid nitrogen is dropped twice, and the eleventh to thirteenth examples in which liquid nitrogen is dropped three times 1, the oxygen concentration tended to increase as the waiting time after dropping the liquid nitrogen became longer.

また、図12及び図13に示すように、液体窒素の滴下数が1回の場合、内圧及び酸素濃度の値にばらつきが見られたが、滴下数が増えるにつれて、該ばらつきが小さくなる傾向にあった。このようなことからも、粉体缶詰100の製造に当たり、液体窒素の滴下数(供給回数)を複数回(2回以上)、より好ましくは、3回以上とすることで、製造した粉体缶詰100の内圧及び酸素濃度のばらつきを抑制できることが明らかとなった。 Further, as shown in FIGS. 12 and 13, when the liquid nitrogen was dropped once, the values of the internal pressure and the oxygen concentration varied, but as the number of drops increased, the variation tended to decrease. there were. For this reason, in the production of the powder canned food 100, the number of drops (the number of times of supply) of liquid nitrogen is set a plurality of times (two or more times), more preferably three times or more. It has been clarified that variations in the internal pressure and oxygen concentration of 100 can be suppressed.

これらのように、液体窒素の総滴下量に加えて、液体窒素を複数回滴下する構成とし、そして、液体窒素の滴下数及び液体窒素の滴下後の待機時間を調整することで、製造する粉体缶詰100は、所定の酸素濃度以下、且つ、所定の内圧以下とできる。また、粉体缶詰100は、製造時における酸素濃度及び内圧のバラツキを抑制することができる。 As described above, in addition to the total amount of liquid nitrogen dropped, liquid nitrogen is dropped multiple times, and by adjusting the number of drops of liquid nitrogen and the waiting time after dropping liquid nitrogen, the powder to be manufactured The canned body 100 can have a predetermined oxygen concentration or less and a predetermined internal pressure or less. In addition, the powder canned food 100 can suppress variations in oxygen concentration and internal pressure during production.

上述したように、本発明の一実施形態に係る粉体缶詰100、粉体缶詰100の製造装置1及び製造方法によれば、粉体の劣化及び容器の不具合を抑制できる。 As described above, according to the powdered canned food 100 and the manufacturing apparatus 1 and manufacturing method for the powdered canned food 100 according to the embodiment of the present invention, it is possible to suppress deterioration of the powder and defects of the container.

なお、本発明は上述した実施形態に限定されるものではない。上述した例では、粉体缶詰100として、再封可能な蓋112を用いる構成を説明したがこれに限定されない。例えば、粉体缶詰100を再封しない用途とする場合には、蓋112は、再封可能でなく、板状の金属蓋の巻締めや樹脂フィルムのヒートシール等による密封等の、適宜の手段が適用できる。 In addition, this invention is not limited to embodiment mentioned above. In the example described above, the powder canned food 100 is configured to use the resealable lid 112, but the present invention is not limited to this. For example, when the powdered canned food 100 is not to be resealed, the lid 112 is not resealable. is applicable.

また、上述した例では、粉体缶詰100の製造装置1及び製造方法において、缶胴111内に液体窒素を空気雰囲気下において供給する例を説明したがこれに限定されない。例えば、粉体缶詰100の製造装置及び製造方法は、気体の窒素によるパージを行う槽内に缶胴111及びノズル13cを配置し、窒素雰囲気下にて缶胴111内にノズル13cから窒素を滴下する構成としてもよい。また、例えば、粉体缶詰100の製造装置及び製造方法は、缶胴111の口部121d又は缶胴111内に気体の窒素を供給(送風)しながら、ノズル13cから缶胴111内に窒素を滴下する構成としてもよい。但し、空気雰囲気下において、ノズル13cから窒素を滴下する製造装置1及び製造方法とすると、設備コストや製造コストが抑えられるため、好ましい。 Moreover, in the above-described example, in the manufacturing apparatus 1 and the manufacturing method of the powder canned food 100, an example in which liquid nitrogen is supplied into the can body 111 in an air atmosphere has been described, but the present invention is not limited to this. For example, the manufacturing apparatus and manufacturing method of the powder canned food 100 includes placing the can body 111 and the nozzle 13c in a tank that is purged with gaseous nitrogen, and dropping nitrogen from the nozzle 13c into the can body 111 under a nitrogen atmosphere. It is good also as a structure which carries out. Further, for example, the manufacturing apparatus and manufacturing method of the powdered canned food 100 supply (ventilate) gaseous nitrogen into the mouth portion 121d of the can body 111 or into the can body 111, and blow nitrogen into the can body 111 from the nozzle 13c. It is good also as a structure which drips. However, the production apparatus 1 and the production method in which nitrogen is dropped from the nozzle 13c in an air atmosphere is preferable because the equipment cost and the production cost can be suppressed.

また、液体窒素の量は、上述した例に限定されず、缶胴111内に滴下する液体窒素の量は、滴下される金属容器101の容量、粉体102を充填した後に金属容器101内に形成されるヘッドスペースの容量、金属容器101の耐圧、充填する粉体102の種類や粒径等に応じて適宜設定できる。また、液体窒素供給機13は、滴下する液体窒素を質量又は重量で管理してもよく、また、ノズル13cから供給される単位時間当たりの液体窒素の供給量と供給時間で管理してもよい。 The amount of liquid nitrogen that is dropped into the can body 111 is not limited to the above-described example. It can be appropriately set according to the capacity of the head space to be formed, the pressure resistance of the metal container 101, the type and particle size of the powder 102 to be filled, and the like. In addition, the liquid nitrogen supply device 13 may manage the liquid nitrogen to be dropped by mass or weight, or may be controlled by the amount of liquid nitrogen supplied from the nozzle 13c per unit time and the supply time. .

また、上述した製造装置1及び製造方法の例では、粉体102及び液体窒素を、金属容器101の缶胴111の口部121dから供給する例を説明したがこれに限定されない。例えば、製造装置1及び製造方法の他の例として、胴体121の首部121cに蓋112を巻締固着し、底蓋122を巻締固着していない金属容器101に粉体102及び液体窒素を供給する構成としてもよい。このような製造装置1及び製造方法とする場合には、搬送装置18は、底蓋122が設けられる胴部121aの下端の開口を上方に向ける姿勢で金属容器101を搬送し、金属容器101内に粉体102及び液体窒素を供給後に、胴体121に底蓋122を巻締固着する構成とすればよい。 Moreover, in the example of the manufacturing apparatus 1 and the manufacturing method described above, an example in which the powder 102 and liquid nitrogen are supplied from the mouth portion 121d of the can body 111 of the metal container 101 has been described, but the present invention is not limited to this. For example, as another example of the manufacturing apparatus 1 and the manufacturing method, the lid 112 is seamed and fixed to the neck portion 121c of the body 121, and the powder 102 and liquid nitrogen are supplied to the metal container 101 in which the bottom lid 122 is not seamed and fixed. It is good also as a structure which carries out. In the manufacturing apparatus 1 and the manufacturing method as described above, the conveying apparatus 18 conveys the metal container 101 in a posture in which the opening of the lower end of the body portion 121a provided with the bottom lid 122 is directed upward, and the inside of the metal container 101 is After the powder 102 and liquid nitrogen are supplied to the body 121, the bottom cover 122 is rolled and fixed to the body 121. FIG.

また、上述した製造装置1及び製造方法の例では、缶胴111(金属容器101)に粉体102を充填した後に、液体窒素を供給する例を説明したがこれに限定されない。例えば、缶胴111に粉体102を充填した後に、粉体102同士の隙間を減らすために、缶胴111に振動又は衝撃を印加する装置又は工程を有する構成としても良い。例えば、装置により缶胴111に振動又は衝撃を印加する場合には、製造装置1が振動又は衝撃印加装置を備える構成であってもよく、また、搬送装置18が缶胴111を搬送するときに、振動を生じさせながら缶胴111を搬送する構成としてもよい。このように、粉体102を充填した後に缶胴111に振動又は衝撃を印加することで、隣り合う粉体102の隙間を減少させることができる。よって、このような製造装置1及び製造方法とすることで、液体窒素を缶胴111に供給したときに、窒素置換がより効率よく行われ、粉体缶詰100の残存する酸素濃度をより低下させることができる。 In addition, in the example of the manufacturing apparatus 1 and the manufacturing method described above, an example of supplying liquid nitrogen after filling the powder 102 into the can body 111 (metal container 101) has been described, but the present invention is not limited to this. For example, after the can body 111 is filled with the powder 102 , in order to reduce the gap between the powders 102 , the configuration may include a device or process for applying vibration or impact to the can body 111 . For example, when vibration or impact is applied to the can body 111 by a device, the manufacturing apparatus 1 may be configured to include a vibration or impact applying device, and when the transport device 18 transports the can body 111, Alternatively, the can body 111 may be transported while vibrating. By applying vibration or impact to the can body 111 after filling the powder 102 in this way, the gap between the adjacent powders 102 can be reduced. Therefore, by using such a manufacturing apparatus 1 and manufacturing method, when liquid nitrogen is supplied to the can body 111, nitrogen replacement is performed more efficiently, and the oxygen concentration remaining in the powder canned food 100 is further reduced. be able to.

なお、本発明は、上記実施形態に限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で種々に変形することが可能である。また、各実施形態は適宜組み合わせて実施してもよく、その場合組み合わせた効果が得られる。更に、上記実施形態には種々の発明が含まれており、開示される複数の構成要件から選択された組み合わせにより種々の発明が抽出され得る。例えば、実施形態に示される全構成要件からいくつかの構成要件が削除されても、課題が解決でき、効果が得られる場合には、この構成要件が削除された構成が発明として抽出され得る。 It should be noted that the present invention is not limited to the above-described embodiments, and can be variously modified in the implementation stage without departing from the gist of the present invention. Further, each embodiment may be implemented in combination as appropriate, in which case the combined effect can be obtained. Furthermore, various inventions are included in the above embodiments, and various inventions can be extracted by combinations selected from a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiments, if the problem can be solved and effects can be obtained, the configuration with the constituent elements deleted can be extracted as an invention.

1…製造装置、11…リンサー、12…粉体充填機、12a…タンク、12b…供給部、13…液体窒素供給機、13a…タンク、13b…配管、13c…ノズル、13d…調整装置、14…密封機、18…搬送装置、18a…搬送元、18b…搬送ライン、18c…搬送先、100…粉体缶詰、101…金属容器、102…粉体、111…缶胴、112…蓋、112a…天板部、112b…スカート部、112c…ナール部、112d…雌ネジ部、112e…タンパーエビデンスバンド部、121…胴体、121a…胴部、121b…肩部、121c…首部、121d…口部、121e…雄ネジ部、122…底蓋。 DESCRIPTION OF SYMBOLS 1... Manufacturing apparatus, 11... Rinser, 12... Powder filling machine, 12a... Tank, 12b... Supply part, 13... Liquid nitrogen supply machine, 13a... Tank, 13b... Piping, 13c... Nozzle, 13d... Adjusting device, 14 Sealing machine 18 Conveying device 18a Conveying source 18b Conveying line 18c Conveying destination 100 Canned powder 101 Metal container 102 Powder 111 Can body 112 Lid 112a Top plate portion 112b Skirt portion 112c Knurl portion 112d Female screw portion 112e Tamper evidence band portion 121 Body 121a Body 121b Shoulder 121c Neck 121d Mouth , 121e... male screw portion, 122... bottom cover.

Claims (13)

粉体と、
前記粉体が充填されるとともに、密封され、内圧が0.15MPa以下であり、酸素濃度が5%以下の金属容器と、
を備える粉体缶詰。
powder;
a metal container filled with the powder, hermetically sealed, having an internal pressure of 0.15 MPa or less and an oxygen concentration of 5% or less;
Powder canned food comprising
前記金属容器は、口部及び胴部を有する缶胴と、前記口部を密封する蓋と、を備え、
前記口部の口径及び前記胴部の胴径の口径/胴径比率が40%~85%である、請求項1に記載の粉体缶詰。
The metal container comprises a can body having a mouth and a body, and a lid that seals the mouth,
2. The powder canned food according to claim 1, wherein a diameter/body diameter ratio of the diameter of the mouth and the diameter of the body is 40% to 85%.
前記蓋は、前記口部を再封可能である、請求項2に記載の粉体缶詰。 3. The powder canned food according to claim 2, wherein said lid is capable of resealing said mouth. 金属容器の缶胴に粉体を充填し、
所定量の液体窒素を1秒~60秒の間隔で前記粉体が充填された前記缶胴の内部へ複数回滴下し、
前記缶胴の口部を前記金属容器の蓋で密封する、
粉体缶詰の製造方法。
Powder is filled into the body of a metal container,
A predetermined amount of liquid nitrogen is dropped multiple times into the interior of the can body filled with the powder at intervals of 1 second to 60 seconds,
sealing the mouth of the can body with the lid of the metal container;
A method for manufacturing powder canned food.
前記金属容器の内圧が0.15MPa以下となる量の前記液体窒素を前記複数回に分けて前記滴下する、請求項4に記載の粉体缶詰の製造方法。 5. The method for producing powder canned food according to claim 4, wherein the amount of liquid nitrogen that makes the internal pressure of the metal container equal to or less than 0.15 MPa is dropped in a plurality of times. 前記缶胴の口部口径及び胴部の胴径は、口径/胴径比率が40%~85%である、請求項4又は請求項5に記載の粉体缶詰の製造方法。 6. The method for producing powdered canned food according to claim 4, wherein the mouth diameter of the can body and the body diameter of the body have a mouth diameter/body diameter ratio of 40% to 85%. 前記蓋は前記口部を再封可能であることを特徴とする請求項4乃至請求項6のいずれか一項に記載の粉体缶詰の製造方法。 7. The method for producing powdered canned food according to any one of claims 4 to 6, wherein the lid is capable of resealing the opening. 前記金属容器の内圧は、0.15MPa以下であり、前記金属容器内の酸素濃度は5%以下である請求項4乃至請求項7のいずれか一項に記載の粉体缶詰の製造方法。 8. The method for producing powder canned food according to any one of claims 4 to 7, wherein the internal pressure of the metal container is 0.15 MPa or less, and the oxygen concentration in the metal container is 5% or less. 金属容器の缶胴に粉体が充填された金属容器の缶胴の内部へ液体窒素を滴下するノズルと、
前記ノズルから所定量の液体窒素を1秒~60秒の間隔で複数回滴下させる制御装置と、
前記缶胴の口部を前記金属容器の蓋で密封する密封機と、
を備える製造装置。
a nozzle for dropping liquid nitrogen into the can body of the metal container filled with powder;
a control device that drops a predetermined amount of liquid nitrogen from the nozzle multiple times at intervals of 1 second to 60 seconds;
a sealing machine that seals the mouth of the can body with the lid of the metal container;
manufacturing equipment.
前記金属容器の内圧が0.15MPa以下となる量の前記液体窒素を前記複数回に分けて前記滴下する、請求項9に記載の製造装置。 10. The manufacturing apparatus according to claim 9, wherein the amount of liquid nitrogen that makes the internal pressure of the metal container equal to or less than 0.15 MPa is dropped in the plurality of times. 前記缶胴の口部口径及び胴部の胴径は、口径/胴径比率が40%~85%である、請求項9又は請求項10に記載の製造装置。 The manufacturing apparatus according to claim 9 or 10, wherein the can body has a mouth diameter and a body diameter with a diameter/body diameter ratio of 40% to 85%. 前記蓋は前記口部を再封可能であることを特徴とする請求項9乃至請求項11のいずれか一項に記載の製造装置。 12. The manufacturing apparatus according to any one of claims 9 to 11, wherein said lid is capable of resealing said opening. 前記金属容器の内圧は、0.15MPa以下であり、前記金属容器内の酸素濃度は5%以下である請求項9乃至請求項12のいずれか一項に記載の製造装置。
The manufacturing apparatus according to any one of claims 9 to 12, wherein the internal pressure of the metal container is 0.15 MPa or less, and the oxygen concentration in the metal container is 5% or less.
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