KR20160016615A - Sterilization method and apparatus thereof of fruits and vegetables - Google Patents

Sterilization method and apparatus thereof of fruits and vegetables Download PDF

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Publication number
KR20160016615A
KR20160016615A KR1020150104162A KR20150104162A KR20160016615A KR 20160016615 A KR20160016615 A KR 20160016615A KR 1020150104162 A KR1020150104162 A KR 1020150104162A KR 20150104162 A KR20150104162 A KR 20150104162A KR 20160016615 A KR20160016615 A KR 20160016615A
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South Korea
Prior art keywords
package
electron beam
strawberry
irradiated
strawberries
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KR1020150104162A
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Korean (ko)
Inventor
히로토시 시부야
도시아키 나카
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시부야 코교 가부시키가이샤
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Publication of KR20160016615A publication Critical patent/KR20160016615A/en

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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/015—Preserving by irradiation or electric treatment without heating effect
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, 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
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/26—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by irradiation without heating
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2300/00—Processes
    • A23V2300/12—Electrical treatment, e.g. electrolysis, electrical field treatment, with or without heating effect

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Health & Medical Sciences (AREA)
  • Nutrition Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)

Abstract

(Solution)
The strawberry is sterilized by irradiating electron beams from the outside of the package P to the fruit and vegetable (strawberry 1) housed in the package P.
The thickness of the package P is set to 350 μm or less and the acceleration voltage of the electron beam is set to 150 kV or more and 300 kV or less so as to irradiate electron beams from one side and the other side of the bundle accommodated in the package, And irradiates an electron beam.
(effect)
You can save your bonds for a longer period.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to sterilization methods,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sterilizing method and apparatus for sterilization of fruits and vegetables and more particularly to a sterilizing method and apparatus for sterilizing fruit and vegetables by irradiating electron beams The present invention relates to a sterilizing method and apparatus for sterilization of fruit and vegetables.

Disclosed is a sterilization method for sterilizing a subject to be sterilized contained in a package by accommodating the sterilized material (fungicide) in the package and irradiating electron beams from the outside of the package (Patent Documents 1 and 2).

Specifically, in Patent Document 1, a sealing material (sealing body) obtained by hermetically sealing a plurality of packaging materials with an oxygen concentration of 0.1% or less is accommodated in a corrugated cardboard box, and then an electron beam is irradiated to sterilize the packaging material.

Patent Document 2 discloses a technique in which the shape of a single layer in the irradiation direction (irradiation direction) is photographed to acquire a density distribution (density distribution) of an object to be irradiated (density distribution) The irradiation conditions are determined so that the variation of the dose distribution (dose distribution) of the irradiation radiation (irradiation radiation) is suppressed to a predetermined reference value or lower, and the irradiation of the radiation is performed in accordance with the irradiation condition.

Japanese Patent Application Laid-Open No. 1-267130 : Japanese Patent Application Laid-Open No. 2000-167029

However, the sterilization methods of Patent Documents 1 and 2 use electron beams of medium energy or high energy with an acceleration voltage of 1 MeV to 10 MeV and use electron beams having such high acceleration voltage A large-scale apparatus configuration is required. In addition, in order to sterilize fruit and berries such as strawberries, the packaging form and irradiation conditions were inadequate.

Therefore, the present invention is to provide a sterilization method and apparatus for sterilization of fruit and vegetables which can be sterilized effectively by sterilizing the fruit and vegetables stored in the package by electron beams, and which can be stored for a longer period of time.

That is, the method of sterilizing the fruit and vegetable of the present invention described in claim 1 is a sterilization method of the fruit and vegetable contained in the package, which sterilizes the fruit by irradiating an electron beam from the outside of the package,

The thickness of the package is set to 350 mu m or less and the acceleration voltage of the electron beam is set to 150 kV or more and 300 kV or less,

Characterized in that an electron beam is irradiated from one side and the other side of the webs accommodated in the package and the whole circumference of the web is irradiated with an electron beam.

The apparatus for sterilizing fruit and vegetable biscuits according to claim 4 is characterized in that it comprises a conveying means for conveying a package containing an adhesive and an electron beam irradiating means for irradiating an electron beam to the package conveyed by the conveying means,

The thickness of the package is set to 350 mu m or less and the acceleration voltage of the electron beam is set to 150 kV or more and 300 kV or less,

And the electron beam irradiating means irradiates electron beams from one side and the other side with respect to the webs held in the package.

The thickness of the package is set to 350 mu m or less and the acceleration voltage of the electron beam by the electron beam irradiating means (electron beam irradiating means) is set to not less than 150 kV and not more than 300 kV, It can be sterilized if it is an accepted fruit.

1 is a configuration diagram of a sterilizing apparatus according to the first embodiment.
Fig. 2 is a view for explaining a strawberry as an apple. Fig.
Fig. 3 is a view for explaining a package, and Fig. 3 (a) is a structural view and Fig. 3 (b) is a plan view.
4 is a table showing the results of the first experiment.
5 is a table showing the results of the second experiment.
6 is a configuration diagram of the sterilizing apparatus according to the second embodiment.
7 is a plan view of the sterilizing apparatus according to the third embodiment.
8 is a cross-sectional view of the sterilizing apparatus according to the third embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a sterilizing device (sterilizing device) 2 for sterilizing a strawberry 1 as an apple and vegetable according to the present embodiment with an electron beam (3) for conveying a package (P) containing the strawberries (1), and a transfer unit (3) for transferring a package (P) (Electron beam irradiating means) 4 for irradiating electron beams to the electron beam irradiation means.

The strawberry 1 sterilizing in this embodiment is composed of a calyx 1a provided for food as shown in Fig. 2 and a so-called fruit stem 1b located at the upper part of the calyx 1a And a plurality of fruits 1c attached to the outer circumferential surface of the calyx section 1a.

In order to suppress the generation of fungi in the strawberry 1, it is preferable to irradiate the whole area of the strawberry 1 with the electron beam and the back of the fruit stem 1b or the fruit 1c, The electron beam to be irradiated passes through the fruit stem 1b or the fruit chamber 1c and reaches the surface of the calyx part 1a so as to reach the surface of the calyx part 1a in the shade of the stem 1b or the fruit 1c, (Accelerating voltage) is set.

Fig. 3 shows a package P capable of accommodating a plurality of strawberries 1, wherein (a) is a structural view and (b) is a plan view, respectively.

The package P includes a tray-like tray portion 11 located on the back side of the lower side, a transparent lid portion 12 covering the tray portion 11, A tray side protective film 13 inserted between the tray portion 11 and the strawberry 1 and a lid side protective film 13 interposed between the lid portion 12 and the strawberry 1, (14).

The tray portion 11 and the lid portion 12 are made of resin such as polyethylene terephthalate having a rigidity enough to hold a predetermined shape even if the strawberry 1 is accommodated therein, The tray-side protective film 13 and the lid-side protective film 14 are made of polyethylene (polyethylene terephthalate) or the like having flexibility so that the strawberry 1 to be contacted is not damaged Of the resin.

The tray-side protective film 13 is provided with a plurality of concave receiving portions 13a formed in accordance with the shape of the strawberry 1 so that the strawberry 1 The strawberry 1 and the strawberry 1 which are adjacent to each other are kept apart from each other.

The total thickness of the tray portion 11 and the tray-side protective film 13 and the total thickness of the lid portion 12 and the lid-side protective film 14 are 350 μm or less .

The package P may have a different shape, for example, a bag-like shape, or the tray-side protective film 13 or the lid-side protective film 14 may be omitted.

However, it is necessary to prevent the adjacent strawberries 1 from contacting each other in the package P based on the experimental results to be described later, and the strawberries or the film are omitted, It is possible to make a configuration for accommodating only one.

The conveying means 3 is a pair of chain conveyors for supporting and conveying a flange portion formed on the outer edge of the tray portion 11 of the package P from below And the tray portion 11 and the lid portion 12 of the package P to be conveyed are exposed upward and downward, respectively.

The electron beam irradiating means 4 is provided along the conveying direction of the conveying means 3 and the first electron beam irradiating means 4A located on the upstream side is provided above the conveying means 3 And the second electron beam irradiating means 4B located on the downstream side are provided below the conveying means 3, respectively.

Each of the electron beam irradiating means 4 is adapted to irradiate an electron beam toward the conveying means 3 and is classified into a so-called low energy device whose acceleration voltage is set at a maximum of 300 kV.

According to the above configuration, the package P conveyed by the conveying means 3 sequentially passes below the first electron beam irradiating means 4A and above the second electron beam irradiating means 4B, 1 The electron beam irradiated by the electron beam irradiating means 4A is transmitted through the lid portion 12 of the package P and the lid side protective film 14 to be irradiated on the upper surface side of the strawberry 1, 4B irradiate the bottom side of the strawberry 1 through the tray portion 11 and the tray-side protective film 13.

Since the strawberries 1 in the package P are held so as to be spaced apart from each other by the accommodating portion 13a, the electron beams irradiated from above and below are irradiated to the entire periphery of the strawberry 1, Is sterilized.

At this time, in the fruit stem 1b and the fruit portion 1c of the strawberry 1, the electron beam is transmitted through them to sterilize the contact portion with the calyx portion 1a and also to receive the strawberry 1 The entire package P is also sterilized.

The dose of the electron beam irradiated to the strawberry 1 accommodated in the package P can be adjusted by adjusting the conveying speed of the package P by the conveying means 3, The dose of the electron beam can be increased.

Fig. 4 and Fig. 5 are tables showing experimental results on sterilization of the strawberry 1 using the electron beam.

Firstly, in the first experiment shown in Fig. 4, strawberries 1 are accommodated in three kinds of packages P having different thicknesses as the package P, and the strawberries 1 of each package P are accelerated Irradiated with electron beams having different voltages, and then the strawberry 1 was kept for a predetermined period to measure the number of moldy strawberries 1.

As the package (P), a bag made of polyethylene having a thickness of 40 탆, a separate packaging container (individual packaging container) made of biaxially oriented polystyrene having a thickness of 120 탆 and a biaxially oriented polystyrene, A package (P) was used. Only one strawberry (1) was accommodated in each of the bag and the individual packaging containers, and a plurality of these were prepared.

Unlike the package P shown in Fig. 3, the lid-side protective film 14 and the tray-side protective film 13 were not provided for the individual packaging containers.

As the package P shown in Fig. 3, in the experiment, the tray portion 11 and the lid portion 12 were made of polyethylene terephthalate having a thickness of 345 mu m, and the tray side protective film 13, (14) was made of polyethylene having a thickness of 5 [micro] m.

The total thickness of the tray portion 11 and the tray-side protective film 13 and the total thickness of the lid portion 12 and the lid-side protective film 14 became 350 μm.

Next, the electron beam irradiating means 4 used in this experiment is a so-called low energy apparatus capable of irradiating an electron beam with an acceleration voltage of 300 kV at maximum. In the experiment, acceleration voltages were set to 100 kV, 150 kV and 300 kV, ) Was set to a target dose of 5 kGy or 10 kGy.

Then, electron beams are irradiated from the upper side and the lower side of the three kinds of bags, the individual packaging containers, and the package P so that the entire periphery of the strawberry 1 is irradiated with the electron beam, and the strawberry 1, (24 ° C) in a room temperature environment for 3 days and 6 days in a state accommodated in a rice straw (P) or the like, and the occurrence of fungi in each strawberry was confirmed.

When irradiated with an electron beam with an accelerating voltage of 100 kV to a target dose of 5 kGy in a strawberry (1) housed in a bag made of polyethylene having a thickness of 40 탆, three strawberries out of 10 (1) And after 6 days, five of 10 strawberries (1) developed mold.

In the same manner as above, when an electron beam having an accelerating voltage of 100 kV and a target dose of 10 kGy was irradiated to the strawberry 1, two strawberries 1 out of 10 occurred during three days, Five out of ten strawberries (1) developed mold.

Next, when the electron beam having an acceleration voltage of 150 kV is irradiated to the strawberry 1 accommodated in the bag, three (1) and one (10 kGy) strawberry 1 out of 10 And 1 (5 kGy) and 1 (10 kGy) strawberry (1) were fungi after 6 days.

Even when the target dose is set to any one of 5 kGy and 10 kGy when the electron beam with an acceleration voltage of 300 kV is irradiated to the strawberry 1 accommodated in the bag, Mold was not identified.

From the above results, it was found that the strawberry 1 housed in a bag having a thickness of 40 탆 can be well stored even if it is irradiated with an electron beam having an acceleration voltage of 150 kV or more for 6 days.

Electron beams having accelerating voltages of 100 kV, 150 kV, and 300 kV were irradiated to berries 1 accommodated in individual packaging containers made of biaxially oriented polystyrene having a thickness of 120 μm in the same manner as described above so that the doses were 5 kGy and 10 kGy, respectively.

(5kGy) and 3 (10kGy) strawberry (1) out of 10 when the accelerating voltage was 100kV, and 8 (5kGy) And 8 (10 kGy) strawberries (1).

(5 kGy) and 3 (10 kGy) strawberries (1) out of 10 when the accelerating voltage was 150 kV, and 8 (5 kGy) And 8 (10 kGy) strawberries (1).

Even when the target dose was set to any one of 5 kGy and 10 kGy when the acceleration voltage was set to 300 kV, no mold was found in the strawberry 1 at the elapsed time of 3 days and the elapsed time of 6 days.

From the above results, it was found that, in the case of the strawberry 1 housed in the individual packaging container having a thickness of 120 탆, the strawberry 1 can be well stored even if it is irradiated with the electron beam at an acceleration voltage of 300 kV for 6 days.

Finally, the strawberries (1) housed in the package (P) having a thickness of 350 m shown in FIG. 3 were irradiated with electron beams having acceleration voltages of 100 kV, 150 kV and 300 kV so that the dose amounts were 5 kGy and 10 kGy, respectively.

(5 kGy) and 4 (10 kGy) strawberries (1) out of 10 at the accelerating voltage of 100 kV, and 8 (5 kGy) and 6 Eight (10 kGy) strawberries (1) developed mold.

When the accelerating voltage was 150 kV, four (5 kGy) and four (10 kGy) strawberries (1) out of 10 were fungal in three days, eight (5 kGy) and Eight (10 kGy) strawberries (1) developed mold.

Even when the target dose was set to any one of 5 kGy and 10 kGy when the acceleration voltage was 300 kV, no mold was found in the strawberry 1 even after three days and six days.

From the above results, it was found that, in the case of the strawberry 1 housed in a container (container) having a thickness of 350 탆, when the electron beam is irradiated at an acceleration voltage of 300 kV, the strawberry 1 can be well stored even for 6 days.

Fig. 5 shows the result of the second experiment. In this second experiment, a plurality of strawberries 1 were placed in contact with each other in two-tiered or three-tiered manner in a container made of deep-bottomed polyethylene, A film made of polyethylene having a thickness of 10 탆 was placed in the opening portion to cover the strawberry, and the film was stored at room temperature for 7 days to measure the number of moldy strawberries 1.

In this experiment, for comparison, irradiation was performed so that the film was irradiated from the upper side of the container with the target dose of 7 kGy and the electron beam with the acceleration voltage of 250 kV was irradiated without irradiation with the electron beam. Experiments were carried out on the number of strawberries shown.

Since the strawberries 1 in the container are in contact with each other when the container is irradiated with the electron beam, electron beams are not irradiated to the contact parts, and electron beams are irradiated from above the container, In this case, the strawberry that has been shaded on the lower side is not irradiated with an electron beam.

As a result of the experiment, the occurrence of fungi was confirmed in strawberries (1) which were not irradiated with electron beams, in 12 out of 12, 8 out of 15, and 10 out of 16 strawberries (1) In total, 30 (70%) of the 43 strawberries (1) become moldy.

On the other hand, in the strawberry (1) irradiated with electron beams, the occurrence of fungi was found in 7 strawberries (1) out of 16, 7 out of 16, and 15 out of 16, (48%) of strawberries (1) out of the 22 molds.

If the strawberries 1 are accommodated in the package P in a state in which they are in contact with each other, molds are generated in almost half of the strawberries 1 even if they are irradiated with electron beams, which is not suitable for long-term storage Proved.

6 shows the sterilizing apparatus 2 according to the second embodiment. The sterilizing apparatus 2 according to the second embodiment includes a transfer means 3 for transferring the package P similarly to the sterilizing apparatus 2 according to the first embodiment, And electron beam irradiating means 4 provided thereon.

The conveying means 3 of the present embodiment includes an upstream conveyor 21 and a downstream conveyor 22 which are divided into upstream and downstream sides and an upstream conveyor 21 and downstream (Inversion means) 23 provided between the side conveyors 22, as shown in Fig.

The reversing means 23 includes a bucket 23a which receives the package P and has a substantially U-shaped cross section and a rotary shaft (rotation shaft) 23a for rotating the bucket 23a 23b.

The bucket 23a is installed between a pair of chain conveyors constituting the upstream conveyor 21 and the downstream conveyor 22 and the rotary shaft 23b is disposed between the upstream conveyor 21 and the downstream conveyor 22, Side bucket 23a is rotated 180 degrees with the direction perpendicular to the conveying direction of the side conveyor 22 as a rotation center.

With this configuration, when the bucket 23a is rotated by the rotation shaft 23b, the bucket 23a is in a state of accepting the opening toward the upstream conveyor 21 and a state of passing the opening toward the downstream conveyor 22 State.

The electron beam irradiating means 4 of this embodiment includes a first electron beam irradiating means 4A provided above the upstream side conveyor 21 and a second electron beam irradiating means 4B provided above the downstream side conveyor 22, And all of them are irradiated with an electron beam from the upper side of the package P conveyed by the conveying means 3. [

According to the sterilizing device 2 having the above-described configuration, the package P is first conveyed to the upstream conveyor 21 of the conveying means 3 with the lid portion 12 directed upward.

The package P passes through the first electron beam irradiating means 4A in the upstream conveyor 21 so that an electron beam is irradiated from the lid portion 12 side of the package P, The upper surface side is sterilized.

The package P that has passed through the first electron beam irradiating means 4A is transferred to the bucket 23a of the reversing means 23 in the accepted state at the downstream end of the upstream conveyor 21 .

In this way, the rotating shaft 23b rotates the bucket 23a up to the handing state, so that the package P in the bucket 23a is turned upside down so that the tray portion 11 faces upward do.

When the bucket 23a is placed in the passing state, the package P is placed on the downstream conveyor 22 and the tray 11 is moved upward by the downstream conveyor 22 Lt; / RTI >

The package P passes through the second electron beam irradiating means 4B in the downstream conveyor 22 so that the electron beam is irradiated from the tray portion 11 side of the package P, 1) is sterilized.

Even in the configuration of the second embodiment as described above, it is possible to irradiate the package P with the electron beam from the tray 11 side and the lid portion 12 side, and to irradiate the entire periphery of the strawberry 1 It is possible to irradiate an electron beam.

7 and 8 show the sterilizing apparatus 2 according to the third embodiment and include a transfer means 3 for transferring the package P as in the sterilizing apparatus 2 of the first embodiment, And electron beam irradiating means 4 provided along the electron beam irradiation means 4.

The conveying means 3 of the present embodiment is provided with a belt conveyor 31 for conveying the package P and an electron beam irradiating means 4 provided adjacent to an end portion of the belt conveyor 31, (Reverse transfer means) 32 for moving the package P downward.

The belt conveyor 31 is adapted to move the package P in a reciprocating manner. Specifically, the belt conveyor 31 rotates the package P, which has not been sterilized by the electron beam, from the upstream side in the left- The package P is transferred to the inversion transferring means 32 and the package P after the electron beam sterilization is received from the inversion transferring means 32 is transferred from the right side in the drawing to the downstream side And is moved in the leftward direction as shown.

The inverting and conveying means 32 includes a bucket 33 for supporting the package P and a first pivoting means for pivoting the arm 34 supporting the bucket 33 in the horizontal direction And a second pivoting means 36 for rotating the arm 34 to rotate the bucket 33. As shown in FIG.

The bucket 33 is configured to support three flange portions of the package P conveyed to the rightward end portion of the belt conveyor 31 as shown in the figure, Member).

The package P supported by the bucket 33 is exposed to the lower side and the upper side of the tray portion 11 and the lid portion 12 respectively so that the upper side and the lower side of the inner strawberry 1 And the electron beam of the electron beam irradiating means 4 is irradiated to the lower surface side.

8 is a view for explaining the first and second pivoting means 35 and 36 of the reversing and conveying means 32. The upper surface of the housing 37 provided adjacent to the belt conveyor 31 Respectively.

The first pivoting means 35 includes a first rotating shaft 39 rotatably installed in the tubular member 38 provided on the upper portion of the housing 37 and a second rotating shaft And a first motor (40) installed inside the first rotary shaft (39) for driving the first rotary shaft (39).

The first rotary shaft 39 has a cylindrical shape and a lower end thereof protrudes into an inner space of the housing 37 and a gear 39a is provided at a tip thereof, The gear 39a meshes with the gear 40a driven by the first motor 40. [

A casing 39b for horizontally supporting the arm 34 and for rotatably supporting the arm 34 is provided at an upper end of the first rotation shaft 39 .

When the first rotation shaft 39 rotates through the gears 39a and 40a by the driving of the first motor 40, the arm 34 rotates together with the casing 39b in the horizontal direction, The bucket 33 provided at the tip of the arm 34 moves the locus of the circular arc shape as shown in Fig.

More specifically, the first pivoting means 35 moves the package P supported by the bucket 33 from the position adjacent to the belt conveyor 31 to the electron beam irradiating means 4, as shown in Fig. To a position exceeding the predetermined range.

The second pivoting means 36 includes a second rotating shaft 41 rotatably installed in the first rotating shaft 39 and a second rotating shaft 41 provided inside the housing 37 to rotate the second rotating shaft 41 And a second motor 42 for driving the motor.

The second rotary shaft 41 extends upward and downward through the first rotary shaft 39 and a driving shaft of the second motor 42 is directly connected to a lower end of the second rotary shaft 41 And a bevel gear 41a accommodated in the casing 39b is provided at an upper end thereof.

A bevel gear 34a meshing with the bevel gear 41a of the second rotation shaft 41 is provided at an end of the arm 34 protruding into the casing 39b. 42 by a driving force.

7, the bucket 33 receives the package P from the belt conveyor 31 in a state in which the lid portion 12 is directed upward, and the second pivoting means 36, And the arm 34 is rotated so as to rotate the package P in a reversed state in which the package P is inverted in a state in which the tray unit 11 faces upward.

The electron beam irradiating means 4 is provided in the middle of the circular trajectory of the package P moved by the reversing transfer means 32 of the transfer means 3 and is located above the passing- As shown in Fig.

The operation of the sterilizing apparatus 2 having the above configuration will be described below. First, the package P in which sterilization has not been completed is placed on the belt conveyor 31, as shown in the figure with the lid portion 12 facing upward Is conveyed from the left direction to the right direction shown in the figure, and stops at the right end position at the right end shown in the drawing.

At this time, the reversing conveying means 32 moves the arm 34 to a position adjacent to the belt conveyor 31 by means of the first pivoting means 35, and by the second pivoting means 36, And the bucket 33 is positioned on the belt conveyor 31. The bucket 33 is positioned on the belt conveyor 31,

When the package P conveyed by the belt conveyor 31 is supported by the bucket 33, the first pivoting means 35 pivots the arm 34 and thereby supports the bucket 33 The package P is passed under the electron beam irradiating means 4 so that the lid portion 12 of the package P is irradiated with an electron beam and the upper side of the strawberry 1 is sterilized.

When the first pivoting means 35 turns the bucket 33 to the position beyond the electron beam irradiating means 4, the second pivoting means 36 pivots the bucket 33 to change from the passing state to the inverted state And the package P is directed to the tray portion 11 upward.

The first pivoting means 35 then turns the bucket 33 in the opposite direction so that the package P again passes under the electron beam irradiating means 4 and reaches the tray portion 11 of the package P ) Is irradiated with an electron beam to sterilize the portion of the lower surface side of the strawberry until that time.

When the first pivoting means 35 moves the bucket 33 to a position adjacent to the belt conveyor 31, the second pivoting means 36 turns the bucket 33 from the inverted state to the passing state, Accordingly, the package P is placed at the pass-through position of the belt conveyor 31 with the lid portion 12 facing upward.

Then, the belt conveyor 31 moves the package P facing the upward direction of the lid part 12 from the right direction shown in the drawing to the left direction shown in the figure.

In the sterilizing apparatus 2 according to the second and third embodiments as well, the upper surface side and the lower surface side of the strawberry 1 housed in the package P are irradiated with an electron beam to irradiate the entire periphery of the strawberry 1 with electron beams It is possible to store the strawberry 1 over a long period of time as in the case of the above experimental results.

In the above embodiment, the strawberry 1 is housed as an apple, but it is needless to say that the same effect can be obtained for a fruit that is easily scalded other than the strawberry 1.

The strawberry 1 accommodated in the package P is irradiated with an electron beam and then the lid portion 12 of the package P is temporarily suspended in an aseptic atmosphere, And ozone is generated by irradiation of the electron beam by injecting sterile air into the opened package P, it can be excluded.

One ; Strawberry
2 ; Sterilizing device
3; Conveying means
4 ; Electron beam irradiation means
11; Tray portion
12; Lid portion
13; Tray side protective film
13a; Receiving portion
14; Protective film on the lid side

Claims (7)

1. A sterilization method (sterilization method) of an adhesive agent for sterilizing an adhesive agent by irradiating an electron beam (electron beam) from the outside of the package with respect to a fruit or vegetable stored in a package,
The thickness of the package is set to 350 mu m or less and the acceleration voltage of the electron beam is set to 150 kV or more and 300 kV or less,
Wherein an electron beam is irradiated from one side and the other side of the web held in the package so as to irradiate the entire circumference of the web with electron beams.
The method according to claim 1,
Wherein a plurality of accommodating portions are formed in the package, and the accommodating portions are accommodated in the accommodating portions so that neighboring adhesive portions are spaced apart from each other.
3. The method according to claim 1 or 2,
Wherein the fruit is strawberry.
(Sterilizing device) having an electron beam irradiating means (electron beam irradiating means) for irradiating an electron beam to the package conveyed by the conveying means, In this case,
The thickness of the package is set to 350 mu m or less and the acceleration voltage of the electron beam is set to 150 kV or more and 300 kV or less,
Wherein said electron beam irradiating means irradiates electron beams from one side and the other side with respect to the webs held in said package.
5. The method of claim 4,
Wherein a plurality of accommodating portions are formed in the package, and the accommodating portions are accommodated in the accommodating portions so that neighboring engravings are spaced apart from each other.
The method according to claim 4 or 5,
And an inverting means (inversion means) for inverting the package,
Characterized in that the package is irradiated with the electron beam by the electron beam irradiating means on the other side surface of the package after inverting the package irradiated with the electron beam by the electron beam irradiating means by the reversing means .
The method according to claim 4 or 5,
Wherein the adhesive is strawberry.
KR1020150104162A 2014-08-05 2015-07-23 Sterilization method and apparatus thereof of fruits and vegetables KR20160016615A (en)

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