JP2020090328A - Microwave oven container and its manufacturing method, and sealing head - Google Patents

Microwave oven container and its manufacturing method, and sealing head Download PDF

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Publication number
JP2020090328A
JP2020090328A JP2020042231A JP2020042231A JP2020090328A JP 2020090328 A JP2020090328 A JP 2020090328A JP 2020042231 A JP2020042231 A JP 2020042231A JP 2020042231 A JP2020042231 A JP 2020042231A JP 2020090328 A JP2020090328 A JP 2020090328A
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Japan
Prior art keywords
heat
welded
container
microwave oven
welding
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JP2020042231A
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JP7348655B2 (en
Inventor
久美雄 丸山
Kumio MARUYAMA
久美雄 丸山
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Kyoraku Co Ltd
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Kyoraku Co Ltd
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Priority claimed from JP2015114225A external-priority patent/JP6777842B2/en
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Priority to JP2022070918A priority Critical patent/JP7415189B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D81/00—Containers, 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
    • B65D81/34—Containers, 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 for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, 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 for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D81/00—Containers, 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
    • B65D81/34—Containers, 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 for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D2581/00—Containers, 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
    • B65D2581/34—Containers, 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 for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, 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 for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves

Abstract

To provide a microwave oven container capable of selectively peeling off a specific part of a heat-welded part formed on a flat surface of a flange part.SOLUTION: A microwave oven container according to the present invention is a container body having an opening in an upper part, a flange part formed so as to extend outward from the opening of the container body, and a lid member heat-welded to the flange part in a heat-welding part. The heat-welded part includes first and second parts provided on a flat surface of the flange part. The first part has a lower welding strength than the second part.SELECTED DRAWING: Figure 1

Description

本発明は、電子レンジ用容器及びその製造方法、及びシールヘッドに関する。 The present invention relates to a microwave oven container, a method for manufacturing the same, and a seal head.

従来、電子レンジ用容器に関し、各種の技術が提案されている（例えば、特許文献１参照）。 Conventionally, various techniques have been proposed for microwave oven containers (for example, refer to Patent Document 1).

特許文献１には、内容物を収納する容器本体と、容器本体の開口を塞ぐ可塑性材料の蓋体とを備える包装容器が開示される。 Patent Document 1 discloses a packaging container that includes a container body that stores contents and a lid member made of a plastic material that closes an opening of the container body.

この包装容器では、電子レンジにより加熱されると、包装容器の内圧の上昇により蓋体が外側に膨出して第１の凸状部において蓋体が剥離し、貫通孔を介して内圧が逃げる。したがって、包装容器においては、食品等の内容物を電子レンジで加熱調理する際、加熱調理前に蒸気を逃がすための孔を開けたり蓋体の一部を剥離させたりしておく必要がない。 In this packaging container, when heated by a microwave oven, the lid body bulges outward due to an increase in the internal pressure of the packaging container, the lid body is peeled off at the first convex portion, and the inner pressure escapes through the through hole. Therefore, in the packaging container, when the contents such as foods are heated and cooked in the microwave oven, it is not necessary to open a hole for letting out steam or to peel off a part of the lid before the cooking.

特開２００９−１２０２４７号公報JP, 2009-120247, A

電子レンジ用容器において、フランジ部の平坦面に形成した熱溶着部の特定部分を選択的に剥離させたい場合もある。 In a microwave oven container, it may be desired to selectively peel off a specific portion of the heat-welded portion formed on the flat surface of the flange portion.

本発明はこのような事情に鑑みてなされたものであり、フランジ部の平坦面に形成した熱溶着部の特定部分を選択的に剥離させることが可能な、電子レンジ用容器を提供するものである。 The present invention has been made in view of such circumstances, and provides a container for a microwave oven capable of selectively peeling off a specific portion of a heat-welded portion formed on a flat surface of a flange portion. is there.

本発明によれば、電子レンジ用容器であって、上部に開口を有する容器本体と、前記容器本体の前記開口から外側に延出するように形成されたフランジ部と、熱溶着部において前記フランジ部に熱溶着された蓋材を備え、前記熱溶着部は、前記フランジ部の平坦面に設けられた第１及び第２部位を備え、第１部位は、第２部位よりも溶着強度が低い、電子レンジ用容器が提供される。 According to the present invention, a container for a microwave oven, having a container body having an opening in an upper portion, a flange portion formed so as to extend outward from the opening of the container body, and the flange in the heat-welding portion. A lid member heat-welded to the portion, the heat-welded portion includes first and second portions provided on the flat surface of the flange portion, and the first portion has a lower welding strength than the second portion. , A microwave oven container is provided.

本発明によれば、第１部位は、第２部位よりも溶着強度が低いので、容器の内圧上昇に伴って第１部位を選択的に剥離させることができる。 According to the present invention, since the first portion has a lower welding strength than the second portion, the first portion can be selectively peeled off as the internal pressure of the container increases.

本発明の第１実施形態に係る電子レンジ用容器の分解斜視図である。It is an exploded perspective view of the container for microwave ovens concerning a 1st embodiment of the present invention. 第１実施形態に係る容器本体の平面図である。It is a top view of the container body concerning a 1st embodiment. 図１のＡ部拡大図である。It is the A section enlarged view of FIG. 図２のＢ−Ｂ線断面図である。It is the BB sectional view taken on the line of FIG. 図２のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 第１実施形態に係る電子レンジ用容器の作用図であり蒸気が排出される様子を示す図である。FIG. 6 is an operation diagram of the microwave oven container according to the first embodiment and is a diagram showing how steam is discharged. 第１実施形態に係る電子レンジ用容器の作用図であり蓋材を剥離する様子を示す図である。FIG. 6 is an operation diagram of the microwave oven container according to the first embodiment and is a diagram showing a state in which a lid member is peeled off. 本発明の第２実施形態に係る容器本体の平面図である。It is a top view of the container body concerning a 2nd embodiment of the present invention. 本発明の第３実施形態に係る容器本体の平面図である。It is a top view of the container body concerning a 3rd embodiment of the present invention. 図９のＤ−Ｄ線断面図である。It is the DD sectional view taken on the line of FIG. 本発明の第４実施形態に係る容器本体の平面図である。It is a top view of the container body concerning a 4th embodiment of the present invention. 図１１のＥ−Ｅ線断面図である。It is the EE sectional view taken on the line of FIG. （ａ）は本発明の第４実施形態に係る第１の熱溶着部及び第２の熱溶着部を形成するためのシールヘッドの底面図、（ｂ）は（ａ）のＦ部拡大図、（ｃ）は（ｂ）のＧ−Ｇ線断面図である。(A) is a bottom view of the seal head for forming the 1st heat-welding part and the 2nd heat-welding part which concerns on 4th Embodiment of this invention, (b) is the F section enlarged view of (a), (C) is a GG line sectional view of (b).

以下、添付図面を参照して、本発明を実施するための形態（以下、「実施形態」と称す
る）について詳細に説明する。実施形態の説明の全体を通して同じ要素には同じ番号を付
している。 Hereinafter, modes for carrying out the present invention (hereinafter, referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same numbers are given to the same elements throughout the description of the embodiments.

（第１実施形態）
まず、第１実施形態に係る電子レンジ用容器の全体構成を図１に基づいて説明する。図
１に示すように、電子レンジ用容器１０は、開口２１を有するとともに開口２１から内容
物１１が充填される容器本体２０と、開口２１を塞ぐフィルム状の蓋材５０と、を主要素
とする。容器本体２０と蓋材５０は、いずれも樹脂材料によって形成される。容器本体２
０に収容される内容物１１は、各種の食品などであり、電子レンジを用いて加熱されるも
のであれば、種類は任意である。 (First embodiment)
First, the overall configuration of the microwave oven container according to the first embodiment will be described with reference to FIG. As shown in FIG. 1, the microwave oven container 10 includes a container body 20 that has an opening 21 and is filled with the content 11 from the opening 21, and a film-like lid member 50 that closes the opening 21 as main elements. To do. Both the container body 20 and the lid member 50 are made of a resin material. Container body 2
The contents 11 accommodated in 0 are various foods, etc., and the kind is arbitrary as long as it is heated using a microwave oven.

また、電子レンジ用容器１０は、フランジ部２２と、このフランジ部２２の上面に形成
され、蓋材５０に熱溶着される第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂと、を備
える。さらに、電子レンジ用容器１０は、蓋材５０を係止する突起部２４をフランジ部２
２に備える。 Further, the microwave oven container 10 includes a flange portion 22, and a first heat welding portion 23A and a second heat welding portion 23B which are formed on the upper surface of the flange portion 22 and are heat welded to the lid member 50. Prepare Further, in the microwave oven container 10, the protrusion 24 that locks the lid member 50 has the flange portion 2.
Prepare for 2.

次に、電子レンジ用容器１０の各部の構成を図１から図５に基づいて説明する。図２に
示すように、容器本体２０は、底２０ａをもつ収容部２０ｂを有する。収容部２０ｂ、底
２０ａ及び開口２１は、平面視で四隅に丸みを有するほぼ四角形（この例では、ほぼ正方
形）を呈する。 Next, the configuration of each part of the microwave oven container 10 will be described with reference to FIGS. 1 to 5. As shown in FIG. 2, the container body 20 has a storage portion 20b having a bottom 20a. The accommodation portion 20b, the bottom 20a, and the opening 21 have a substantially quadrangular shape (in this example, a substantially square shape) having rounded corners in a plan view.

フランジ部２２は、開口２１から外側に延出するように形成される。また、フランジ部
２２は、第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂが設けられる内側の部分（以下
、「内側部分２２ａ」と称する）よりも外側の部分であって収容部２０ｂの四隅のそれぞ
れに対応した位置に、角部２２ｂを有する。各角部２２ｂは、段差２２ｃを介して内側部
分２２ａに連なり、内側部分２２ａよりも一段低い位置に形成される。 The flange portion 22 is formed so as to extend outward from the opening 21. Further, the flange portion 22 is a portion outside the inner portion (hereinafter referred to as “inner portion 22a”) where the first heat-welded portion 23A and the second heat-welded portion 23B are provided and is the housing portion 20b. Has corners 22b at the positions corresponding to the four corners of each. Each corner portion 22b is continuous with the inner portion 22a via the step 22c, and is formed at a position lower than the inner portion 22a.

なお、容器本体２０の成形の際の反りを予め見越し、フランジ部２２の延出端に向かっ
て、内側部分２２ａを水平面Ｈに対し、角度θ１で下方に傾斜させてもよい（図４参照）
。このようなフランジ部２２の傾斜は、フランジ部２２の全周においてほぼ同様に形成す
ることができる。 It should be noted that the inner portion 22a may be inclined downward at an angle θ1 with respect to the horizontal plane H toward the extended end of the flange portion 22 in anticipation of warpage during molding of the container body 20 (see FIG. 4).
. Such an inclination of the flange portion 22 can be formed in substantially the same manner on the entire circumference of the flange portion 22.

図１に戻る。図１に示すように、蓋材５０は、フランジ部２２の外周とほぼ同じ大きさ
の外周を有する。蓋材５０は、内容物１１を収容部２０ｂに充填した後に、第１の熱溶着
部２３Ａ及び第２の熱溶着部２３Ｂに熱溶着（シール）されることによって、開口２１を
閉塞し収容部２０ｂを密閉する。 Returning to FIG. As shown in FIG. 1, the lid member 50 has an outer circumference that is substantially the same size as the outer circumference of the flange portion 22. The lid member 50 closes the opening 21 and is closed by being heat-welded (sealed) to the first heat-welded portion 23A and the second heat-welded portion 23B after the contents 11 are filled in the housing portion 20b. Seal 20b.

図２に示すように、第１の熱溶着部２３Ａは、フランジ部２２の内側部分２２ａの上面
の全周のうち、蒸気を排出するために切り欠かれた蒸気排出部２５を除いて、リブ状に形
成され、蓋材５０に熱溶着される。この例では、蒸気排出部２５は、フランジ部２２の一
つの角部２２ｂの内側近傍に設けられる。 As shown in FIG. 2, the first heat-welded portion 23A includes ribs except for the steam discharge portion 25 that is cut out to discharge steam in the entire circumference of the upper surface of the inner portion 22a of the flange portion 22. And is heat-welded to the lid member 50. In this example, the vapor discharge part 25 is provided near the inside of one corner 22 b of the flange 22.

第２の熱溶着部２３Ｂは、第１の熱溶着部２３Ａの内周側に凹部２６を形成するように
リブ状に形成され、蓋材５０に熱溶着される。第２の熱溶着部２３Ｂは、フランジ部２２
の内側部分２２ａの上面の全周にわたって形成されている。第２の熱溶着部２３Ｂは、フ
ランジ部２２の内側部分２２ａの上面において容器本体２０の開口２１を囲むように、ほ
ぼ四角形（この例では、ほぼ正方形）に形成されている。そして、この第２の熱溶着部２
３Ｂは、蒸気排出部２５に対応する位置に外側へ向かうＶ字部２７（易剥離部）を有する
（図３参照）。 The second heat-welded portion 23B is formed in a rib shape so as to form the recess 26 on the inner peripheral side of the first heat-welded portion 23A, and is heat-welded to the lid member 50. The second heat welding portion 23B is the flange portion 22.
Is formed over the entire circumference of the upper surface of the inner portion 22a. The second heat-welding portion 23B is formed in a substantially rectangular shape (in this example, a substantially square shape) so as to surround the opening 21 of the container body 20 on the upper surface of the inner portion 22a of the flange portion 22. Then, the second heat welding portion 2
3B has a V-shaped portion 27 (easy peeling portion) toward the outside at a position corresponding to the vapor discharge portion 25 (see FIG. 3 ).

図４に示すように、第２の熱溶着部２３Ｂは、この例では、その上面２３Ｂ１が第１の
熱溶着部２３Ａの上面２３Ａ１よりも寸法ｈだけ低い位置に形成される。これにより、シ
ールバー（図示省略）で蓋材５０を第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂに対
して上方から押圧したとき、第２の熱溶着部２３Ｂに対するシールバーの押圧力が第１の
熱溶着部２３Ａに対するシールバーの押圧力よりも小さくなるため、第２の熱溶着部２３
Ｂにおける蓋材５０との溶着強度が、第１の熱溶着部２３Ａにおける蓋材５０との溶着強
度よりも低くなる。これにより、電子レンジ用容器１０を電子レンジで加熱し、収容部２
０ｂ内の蒸気圧が上昇し所定の圧力に達したとき、蓋材５０は、第１の熱溶着部２３Ａの
シール面（上面２３Ａ１）よりも先に、第２の熱溶着部２３Ｂのシール面（上面２３Ｂ１
）のいずれかの場所において剥離する。すなわち、第１の熱溶着部２３Ａ及び第２の熱溶
着部２３Ｂにおいては、収容部２０ｂ内の蒸気圧が所定の圧力に達したとき、第１の熱溶
着部２３Ａと蓋材５０のシール性は維持する一方、第２の熱溶着部２３Ｂと蓋材５０のシ
ール性は喪失させる。 As shown in FIG. 4, in this example, the second heat-welded portion 23B is formed such that its upper surface 23B1 is lower than the upper surface 23A1 of the first heat-welded portion 23A by a dimension h. Accordingly, when the lid member 50 is pressed against the first heat-welded portion 23A and the second heat-welded portion 23B from above by the seal bar (not shown), the seal bar is pressed against the second heat-welded portion 23B. Since the pressure becomes smaller than the pressing force of the seal bar against the first heat-welded portion 23A, the second heat-welded portion 23
The welding strength of the lid material 50 at B is lower than the welding strength of the lid material 50 at the first heat-welding portion 23A. As a result, the microwave oven container 10 is heated in the microwave oven, and the container 2
When the vapor pressure in 0b rises and reaches a predetermined pressure, the lid member 50 has a sealing surface of the second thermal welding portion 23B before the sealing surface (upper surface 23A1) of the first thermal welding portion 23A. (Upper surface 23B1
) Peel off at any place. That is, in the first heat-welded portion 23A and the second heat-welded portion 23B, when the vapor pressure in the housing portion 20b reaches a predetermined pressure, the sealing property between the first heat-welded portion 23A and the lid member 50 is While maintaining the above, the sealing property between the second heat-welded portion 23B and the lid member 50 is lost.

なお、第２の熱溶着部２３Ｂの幅を第１の熱溶着部２３Ａの幅よりも小さくすることに
よっても、第２の熱溶着部２３Ｂにおける溶着強度を、第１の熱溶着部２３Ａにおける溶
着強度よりも低くすることが可能である。 In addition, by making the width of the second heat-welded portion 23B smaller than the width of the first heat-welded portion 23A, the welding strength of the second heat-welded portion 23B can be made smaller than that of the first heat-welded portion 23A. It can be lower than the strength.

凹部２６は、第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂの間に溝状に形成されて
おり、収容部２０ｂ内の蒸気圧が所定の圧力に達し、第２の熱溶着部２３Ｂがいずれかの
場所で蓋材５０と剥離したとき、その剥離した箇所からの蒸気を蒸気排出部２５へ誘導す
る機能を有する。 The recessed portion 26 is formed in a groove shape between the first heat-welded portion 23A and the second heat-welded portion 23B, the vapor pressure in the housing portion 20b reaches a predetermined pressure, and the second heat-welded portion is formed. When 23B is separated from the lid member 50 at any place, it has a function of guiding the steam from the separated part to the steam discharge part 25.

Ｖ字部２７は、平面視において、フランジ部２２の１つの角部２２ｂに向かって（外側
に向かって）閉塞するようにＶ字状に形成される（図２参照）。これにより、使用者は、
蓋材５０の端部（この例では、図１に示される蓋材５０の角部５０ａ）を摘み、引き上げ
るようにして蓋材５０をＶ字部２７から剥離する際、力がＶ字部２７の先端２７ａ側に集
中するため、小さな力でも蓋材５０を容易に剥離することができる。 The V-shaped portion 27 is formed in a V-shape so as to close (toward the outside) one corner portion 22b of the flange portion 22 in a plan view (see FIG. 2 ). This allows the user to
When the end portion of the lid member 50 (in this example, the corner portion 50a of the lid member 50 shown in FIG. 1) is picked up and peeled off from the V-shaped portion 27, the force is applied to the V-shaped portion 27. Since it concentrates on the tip end 27a side, the lid member 50 can be easily peeled off with a small force.

なお、蒸気圧の上昇による剥離あるいは使用者による剥離において、蓋材５０が容易に
剥離されることを考慮すると、容器本体２０の少なくとも第２の熱溶着部２３Ｂと、蓋材
５０の少なくとも裏面とは、剥離に必要な力が小さくて済むような材質の組み合わせであ
ることが望ましい。剥離し易い材質の組み合わせとしては、例えば、容器本体２０の少な
くとも第２の熱溶着部２３Ｂには、ポリエチレン（ＰＥ）にポリプロピレン（ＰＰ）を混
ぜ合わせた材料を用い、蓋材５０の少なくとも裏面には、ポリエチレン（ＰＥ）を用いる
など、溶着可能ではあるが互いに異なる材質の組み合わせを用いることができる。 Considering that the lid member 50 is easily peeled when peeling due to an increase in vapor pressure or peeling by the user, at least the second heat-welded portion 23B of the container main body 20 and at least the back surface of the lid member 50. Is preferably a combination of materials that requires only a small force for peeling. As a combination of materials that can be easily peeled off, for example, a material obtained by mixing polyethylene (PE) with polypropylene (PP) is used for at least the second heat-welded portion 23B of the container body 20, and at least the back surface of the lid member 50 is used. Can be welded but can be made of a combination of different materials such as polyethylene (PE).

図５に示すように、Ｖ字部２７は、断面視において、フランジ部２２の１つの角部２２
ｂに向かって（外側に向かって）下方へ角度θ２で傾斜する。この傾斜により、Ｖ字部２
７における溶着強度を、第２の熱溶着部２３Ｂの他の部分よりもさらに小さく設定するこ
とができる。 As shown in FIG. 5, the V-shaped portion 27 has one corner portion 22 of the flange portion 22 in a sectional view.
Incline downwardly toward b (outward) at an angle θ2. Due to this inclination, the V-shaped portion 2
The welding strength at No. 7 can be set to be smaller than that at the other portions of the second heat welding portion 23B.

また、Ｖ字部２７は、断面視において、その内側に収容部２０ｂの底２０ａに向かって
角度θ３で傾斜する凹部２７ｂを有する。このような凹部２７ｂを形成することにより、
蒸気が蒸気排出部２５から抜けて収容部２０ｂが減圧されても、凹部２７ｂによって容器
本体２０の内部（収容部２０ｂ）と外部との連通が確実に確保されるため、収容部２０ｂ
が真空状態になることを防ぐことができる。この凹部２７ｂの作用により、蓋材５０が収
容部２０ｂの減圧時に内容物１１に付着することを防止することができる。 Further, the V-shaped portion 27 has a concave portion 27b which is inclined inside at an angle θ3 toward the bottom 20a of the housing portion 20b in a sectional view. By forming such a recess 27b,
Even if the steam escapes from the steam discharge part 25 and the accommodation part 20b is depressurized, the recess 27b ensures the communication between the inside (the accommodation part 20b) of the container body 20 and the outside, so that the accommodation part 20b.
Can be prevented from becoming a vacuum state. Due to the action of the concave portion 27b, it is possible to prevent the lid member 50 from adhering to the contents 11 when the containing portion 20b is depressurized.

図３に戻る。図３に示すように、突起部２４は、角部２２ｂ上であって蒸気排出部２５
の外側に対向する位置に設けられる。突起部２４は、蒸気排出部２５の近傍に配置され、
上方に向かって先細る円錐状の基部２４ａと、この基部２４ａの上部に形成される球面部
２４ｂとを有する。球面部２４ｂには、蓋材５０の角部５０ａ（図１参照）が熱溶着され
る。突起部２４は、収容部２０ｂの減圧時に蓋材５０の角部５０ａを係止する作用をなす
。このように、前述した凹部２７ｂとともに突起部２４を蒸気排出部２５の近傍に設ける
ことにより、凹部２７ｂの作用と相俟って、蓋材５０が収容部２０ｂの減圧時に内容物１
１に付着することを、より一層防止することができる。なお、突起部２４の構成は、この
例に格別に限定されるものではく、収容部２０ｂの減圧時に蓋材５０の角部５０ａを係止
可能な構成であれば任意である。 Returning to FIG. As shown in FIG. 3, the protruding portion 24 is located on the corner portion 22b and the vapor discharge portion 25.
Is provided at a position facing the outside of the. The protrusion 24 is arranged in the vicinity of the vapor discharge unit 25,
It has a conical base portion 24a that tapers upward and a spherical surface portion 24b formed on the upper portion of the base portion 24a. The corner portion 50a (see FIG. 1) of the lid member 50 is heat-welded to the spherical surface portion 24b. The protrusion 24 has a function of locking the corner portion 50a of the lid member 50 when the accommodation portion 20b is depressurized. By thus providing the protrusion 24 together with the above-described recess 27b in the vicinity of the vapor discharge unit 25, the lid member 50 works together with the operation of the recess 27b to reduce the contents 1 during the depressurization of the accommodating unit 20b.
It is possible to further prevent the adhesion to No. 1. The configuration of the protrusion 24 is not particularly limited to this example, and may be any configuration as long as the corner 50a of the lid member 50 can be locked when the accommodating portion 20b is depressurized.

続いて、電子レンジ用容器１０の作用を図６及び図７に基づいて説明する。図６に示す
ように、電子レンジ用容器１０を電子レンジで加熱すると、収容部２０ｂ内に生じる蒸気
圧の上昇により、蓋材５０が膨らむ。蓋材５０が膨らむと、第２の熱溶着部２３Ｂのシー
ル面に力が集中し、蒸気圧が所定の圧力に達したときに、第２の熱溶着部２３Ｂのシール
面のいずれかの場所で蓋材５０が剥離する。 Next, the operation of the microwave oven container 10 will be described with reference to FIGS. 6 and 7. As shown in FIG. 6, when the microwave oven container 10 is heated in the microwave oven, the lid member 50 swells due to an increase in vapor pressure generated in the housing portion 20b. When the lid member 50 swells, the force concentrates on the seal surface of the second heat-welding portion 23B, and when the vapor pressure reaches a predetermined pressure, the seal surface of the second heat-welding portion 23B is located at any place. Then, the lid material 50 is peeled off.

図６において矢印（１）で示すように、剥離した箇所からの蒸気は、凹部２６によって
蒸気排出部２５へ誘導され、蒸気排出部２５から外部に排出される。この例では、第１の
熱溶着部２３Ａよりも溶着強度が低い第２の熱溶着部２３Ｂのうち、傾斜によって溶着強
度がさらに低く設定されているＶ字部２７において、剥離が生じ易くなっており、この場
合、図６において矢印（２）で示すように、より蒸気排出部２５に近い部分（Ｖ字部２７
）から蒸気が良好に抜ける。 As shown by the arrow (1) in FIG. 6, the vapor from the peeled portion is guided to the vapor discharge portion 25 by the recess 26 and is discharged to the outside from the vapor discharge portion 25. In this example, in the second heat-welded portion 23B whose welding strength is lower than that of the first heat-welded portion 23A, the V-shaped portion 27 in which the welding strength is set even lower due to the inclination is likely to cause peeling. In this case, as shown by an arrow (2) in FIG. 6, a portion (V-shaped portion 27) closer to the vapor discharge portion 25 is provided.
), the steam escapes well.

そして、使用者は、図７において矢印（３）で示すように、蒸気排出部２５に対応する
蓋材５０の角部５０ａを摘まんで持ち上げ、引き上げるようにして蓋材５０を突起部２４
及びＶ字部２７から剥離する。この際、Ｖ字部２７が外側に向かって閉塞するように形成
されているので、使用者は、より小さな力で蓋材５０の剥離を開始でき、蓋材５０を容器
本体２０から容易に取り除くことができる。 Then, as shown by an arrow (3) in FIG. 7, the user grasps and lifts the corner portion 50a of the lid member 50 corresponding to the vapor discharge portion 25 to raise and lift the lid member 50.
And peeled off from the V-shaped portion 27. At this time, since the V-shaped portion 27 is formed so as to be closed outward, the user can start peeling the lid member 50 with a smaller force, and the lid member 50 can be easily removed from the container body 20. be able to.

以上、説明した第１実施形態の効果について述べる。第１実施形態によれば、第１の熱
溶着部２３Ａ及び第２の熱溶着部２３Ｂの間の凹部２６を通ってきた蒸気を所定の蒸気排
出部２５に誘導して、外部へ排出することができる。このため、蓋体を溶着する２つの凸
状部の間の蒸気の通り道に貫通孔を開けた従来の構造に比べ、内容物１１が漏れにくい構
造が得られ、このような構造において、蒸気を蒸気排出部２５から良好に排出することが
できる。 The effects of the first embodiment described above are described above. According to the first embodiment, the steam that has passed through the recess 26 between the first heat-welded portion 23A and the second heat-welded portion 23B is guided to the predetermined steam discharge portion 25 and discharged to the outside. You can Therefore, as compared with the conventional structure in which the through hole is formed in the steam passage between the two convex portions for welding the lid body, a structure in which the contents 11 are less likely to leak can be obtained. It can be satisfactorily discharged from the steam discharge part 25.

（第２実施形態）
次に、本発明の第２実施形態に係る容器本体を図８に基づいて説明する。前述した容器
本体２０の収容部２０ｂ（図２参照）は平面形状がほぼ正方形であったが、収容部２０ｂ
の平面形状は、ほぼ正方形の他、円形、長円形など各種の形状から選択可能である。 (Second embodiment)
Next, the container body according to the second embodiment of the present invention will be described based on FIG. The housing portion 20b (see FIG. 2) of the container body 20 described above has a substantially square planar shape.
The plane shape of can be selected from various shapes such as a circle and an oval other than a substantially square shape.

図８に示すように、例えば、第２実施形態に係る容器本体６０では、収容部２０ｂの平
面形状が円形であり、円形の開口２１から外側に延出するようにフランジ部２２が形成さ
れる。フランジ部２２は、内側部分２２ａの外側に段差２２ｃを介して四つの角部２２ｂ
を有する。フランジ部２２の内側部分２２ａには、凹部２６を挟んで第１の熱溶着部２３
Ａ及び第２の熱溶着部２３Ｂが形成される。そして、フランジ部２２の一つの角部２２ｂ
に対応した位置には、蒸気排出部２５及びＶ字部２７が設けられ、さらに、この角部２２
ｂの、蒸気排出部２５の外側に対向する位置には、突起部２４が設けられる。 As shown in FIG. 8, for example, in the container main body 60 according to the second embodiment, the accommodation portion 20b has a circular planar shape, and the flange portion 22 is formed so as to extend outward from the circular opening 21. .. The flange portion 22 has four corner portions 22b on the outer side of the inner portion 22a via a step 22c.
Have. The inner portion 22a of the flange portion 22 has a first heat-welded portion 23 sandwiching the recess 26.
A and the second heat-welded portion 23B are formed. Then, one corner portion 22b of the flange portion 22
The steam discharge part 25 and the V-shaped part 27 are provided at the position corresponding to
A protruding portion 24 is provided at a position of b that faces the outside of the steam discharge portion 25.

このように平面形状が円形の収容部２０ｂを有する容器本体６０においても、前述した
容器本体２０（図２参照）と同様に、第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂの
間の凹部２６を通ってきた蒸気を所定の蒸気排出部２５に誘導して、外部へ排出すること
ができ、内容物１１が漏れにくい構造において、蒸気を蒸気排出部２５から良好に排出す
ることができる。 In the container body 60 having the housing portion 20b having a circular planar shape as described above, the space between the first heat-welding portion 23A and the second heat-welding portion 23B is the same as in the container body 20 (see FIG. 2) described above. The steam that has passed through the recesses 26 can be guided to a predetermined steam discharge section 25 and discharged to the outside, and the steam can be satisfactorily discharged from the steam discharge section 25 in a structure in which the contents 11 are unlikely to leak. it can.

（第３実施形態）
続いて、本発明の第３実施形態に係る容器本体を図９、図１０に基づいて説明する。第
３実施形態は、第１又は第２実施形態のＶ字部２７をＷ字部７１（易剥離部）としたもの
であり、収容部２０ｂの平面形状は、角丸のほぼ長円形の形状としている。図９及び図１
０に示すように、容器本体７０は、平面形状がほぼ長方形の収容部２０ｂ及び開口２１を
有する。開口２１から延出されるフランジ部２２には、リブ状の第１の熱溶着部２３Ａ及
びリブ状の第２の熱溶着部２３Ｂが設けられる。そして、第２の熱溶着部２３Ｂは、平面
視において、蒸気排出部２５に対応する位置に外側に向かって閉塞するようにＷ字状に形
成されるＷ字部７１を有する。Ｗ字部７１は、外側に向く２つの先端７１ａと、内側に向
く１つの基端７１ｂとをもつ。 (Third Embodiment)
Next, the container body according to the third embodiment of the present invention will be described based on FIGS. 9 and 10. In the third embodiment, the V-shaped portion 27 of the first or second embodiment is a W-shaped portion 71 (easy peeling portion), and the accommodation portion 20b has a planar shape that is a substantially oval shape with rounded corners. I am trying. 9 and 1
As shown in FIG. 0, the container body 70 has an accommodation portion 20b and an opening 21 each having a substantially rectangular planar shape. A rib-shaped first heat-welded portion 23A and a rib-shaped second heat-welded portion 23B are provided on the flange portion 22 extending from the opening 21. Then, the second heat-welding portion 23B has a W-shaped portion 71 formed in a W-shape so as to be closed outward at a position corresponding to the vapor discharge portion 25 in a plan view. The W-shaped portion 71 has two front ends 71a facing outward and one base end 71b facing inward.

使用者は、蓋材５０を摘み、引き上げるようにして蓋材５０をＷ字部７１から剥離する
際、力をＷ字部７１の２つの先端７１ａのいずれか少なくとも一方側に集中させることに
より、小さな力でも蓋材５０を容易に剥離することができる。また、蒸気圧の上昇により
蓋材５０が自動開封する際、Ｗ字部７１の基端７１ｂに応力が集中するため、Ｗ字部７１
において、より剥離が生じ易くなる。また、このＷ字部７１においても、断面視において
、フランジ部２２の１つの角部２２ｂに向かって（外側に向かって）下方へ角度θ２（図
１０参照）で傾斜する。この傾斜により、前述したＶ字部２７と同様に、Ｗ字部７１にお
ける溶着強度を、第２の熱溶着部２３Ｂの他の部分よりもさらに小さく設定することがで
きる。 When the user picks up the lid member 50 and peels the lid member 50 from the W-shaped portion 71 by pulling it up, by concentrating the force on at least one of the two tips 71a of the W-shaped portion 71, The lid member 50 can be easily peeled off with a small force. Further, when the lid member 50 is automatically opened due to an increase in vapor pressure, stress concentrates on the base end 71b of the W-shaped portion 71, so the W-shaped portion 71 is formed.
In, peeling is more likely to occur. Further, also in this W-shaped portion 71, in a cross-sectional view, it is inclined downward (toward the outside) at an angle θ2 (see FIG. 10) toward one corner portion 22b of the flange portion 22. Due to this inclination, similarly to the V-shaped portion 27 described above, the welding strength in the W-shaped portion 71 can be set to be smaller than the other portions of the second heat-welded portion 23B.

また、内側の第２の熱溶着部２３Ｂの幅を第１の熱溶着部２３Ａの幅よりも小さく（よ
り細く）設定することにより、第２の熱溶着部２３Ｂの溶着強度を、第１の熱溶着部２３
Ａの溶着強度よりも一層低く設定することができる。加えて、このように溶着強度の低い
第２の熱溶着部２３Ｂにおいて、Ｗ字部７１は、第２の熱溶着部２３Ｂの他の部分よりも
、さらに幅狭に（さらに細く）形成されており、第１の熱溶着部２３Ａ及び第２の熱溶着
部２３Ｂの中で、最も溶着強度が低くなっている。 In addition, by setting the width of the inner second heat-welding portion 23B to be smaller (thinner) than the width of the first heat-welding portion 23A, the welding strength of the second heat-welding portion 23B can be set to the first Heat welding part 23
It can be set lower than the welding strength of A. In addition, in the second heat-welded portion 23B having such low welding strength, the W-shaped portion 71 is formed to be narrower (thinner) than the other portions of the second heat-welded portion 23B. Therefore, the welding strength is the lowest among the first heat welding portion 23A and the second heat welding portion 23B.

この第３実施形態においても、第２の熱溶着部２３Ｂの特にＷ字部７１にて蓋材５０を
剥離させ、第１の熱溶着部２３Ａ及び第２の熱溶着部２３Ｂの間の凹部２６を通ってきた
蒸気を所定の蒸気排出部２５に誘導して、外部へ排出することができ、内容物１１が漏れ
にくい構造において、蒸気を蒸気排出部２５から良好に排出することができる。 Also in the third embodiment, the lid member 50 is peeled off at the W-shaped portion 71 of the second heat-welded portion 23B, and the recess 26 is formed between the first heat-welded portion 23A and the second heat-welded portion 23B. The steam that has passed through can be guided to a predetermined steam discharge unit 25 and discharged to the outside, and in a structure in which the contents 11 are unlikely to leak, the steam can be discharged well from the steam discharge unit 25.

（第４実施形態）
次に、本発明の第４実施形態に係る容器本体を図１１、図１２に基づいて説明する。第
４実施形態は、第３実施形態において、第１の熱溶着部８１Ａ及び第２の熱溶着部８１Ｂ
を帯状としたものである。図１１及び図１２に示すように、容器本体８０は、平面形状が
ほぼ長方形の収容部２０ｂ及び開口２１を有する。開口２１から延出されるフランジ部２
２には、帯状の第１の熱溶着部８１Ａと帯状の第２の熱溶着部８１Ｂ（いずれの溶着部も
図１１においてドット模様で示される平坦な部分）が形成される。すなわち、第１の熱溶
着部８１Ａ及び第２の熱溶着部８１Ｂは、リブ状ではなく、第１の熱溶着部８１Ａ及び第
２の熱溶着部８１Ｂの間に蒸気が通り抜けできる空間（非熱溶着部８２）ができる範囲で
平坦な形状に形成されている。また、第２の熱溶着部８１Ｂは、平面視において、蒸気排
出部２５に対応する位置に外側に向かって閉塞し、かつ、平坦な形状のＷ字部７１を有す
る。 (Fourth Embodiment)
Next, a container body according to the fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12. The fourth embodiment is the same as the third embodiment except that the first heat-welded portion 81A and the second heat-welded portion 81B.
Is a belt-like shape. As shown in FIGS. 11 and 12, the container main body 80 has a housing portion 20b and an opening 21 each having a substantially rectangular planar shape. Flange portion 2 extended from the opening 21
On band 2, a band-shaped first heat-welded portion 81A and a band-shaped second heat-welded portion 81B (both welded portions are flat portions shown by dot patterns in FIG. 11) are formed. That is, the first heat-welded portion 81A and the second heat-welded portion 81B are not rib-shaped, but a space through which steam can pass between the first heat-welded portion 81A and the second heat-welded portion 81B (non-heat The welded portion 82) is formed in a flat shape within a range where it can be formed. Further, the second heat-welding portion 81B has a flat W-shaped portion 71 that is closed outward at a position corresponding to the vapor discharge portion 25 in a plan view.

より具体的には、これら第１の熱溶着部８１Ａ及び第２の熱溶着部８１Ｂは、熱溶着用
のシールヘッド９０（図１２、図１３（ａ）〜（ｃ）参照）を用いて形成することができ
る。すなわち、シールヘッド９０は、第１の熱溶着部８１Ａに対応した第１の凸部９１Ａ
及び第２の熱溶着部８１Ｂに対応した第２の凸部９１Ｂ（いずれの凸部も図１３（ａ）及
び（ｂ）において斜線で示される部分）を有し、これら第１の凸部９１Ａ及び第２の凸部
９１Ｂのそれぞれの平坦な下面を、蓋材５０を介してフランジ部２２の平坦な上面に押し
当てることにより、蓋材５０と溶着した第１の熱溶着部８１Ａ及び第２の熱溶着部８１Ｂ
がフランジ部２２の上面に形成される。なお、図１１では、蓋材５０がフランジ部２２に
熱溶着された後の容器本体８０を示しており、第１の熱溶着部８１Ａ及び第２の熱溶着部
８１Ｂを分かり易く実線で示すため、蓋材５０を想像線（二点鎖線）で示している。 More specifically, the first heat-welded portion 81A and the second heat-welded portion 81B are formed by using a seal head 90 (see FIGS. 12 and 13A to 13C) for heat-welding. can do. That is, the seal head 90 has the first convex portion 91A corresponding to the first heat-welded portion 81A.
And a second convex portion 91B corresponding to the second heat-welded portion 81B (both convex portions are shaded in FIGS. 13A and 13B), and these first convex portions 91A are included. By pressing the flat lower surfaces of the second convex portion 91B and the second convex portion 91B against the flat upper surface of the flange portion 22 via the lid member 50, the first heat welding portion 81A and the second heat welding portion 81A welded to the lid member 50. Heat welded part 81B
Are formed on the upper surface of the flange portion 22. In addition, in FIG. 11, the container body 80 after the lid member 50 is heat-welded to the flange portion 22 is shown, and the first heat-welded portion 81A and the second heat-welded portion 81B are shown by solid lines for easy understanding. , The lid member 50 is shown by an imaginary line (two-dot chain line).

また、図１２に示すように、シールヘッド９０において、内側の第２の凸部９１Ｂの下
端を第１の凸部９１Ａの下端よりも高い位置に設定したり、第２の熱溶着部８１Ｂに対応
するフランジ部２２の上面８１Ｂ１を、第１の熱溶着部８１Ａに対応する上面８１Ａ１よ
りも低い位置に形成したりすることで、第１の熱溶着部８１Ａの溶着強度よりも第２の熱
溶着部８１Ｂの溶着強度を低く設定することができる。また、シールヘッド９０において
、第２の凸部９１Ｂの幅を第１の凸部９１Ａの幅よりも小さく（細く）設定することによ
り、第２の熱溶着部８１Ｂの溶着強度を第１の熱溶着部８１Ａの溶着強度よりも、一層低
く設定することができる。加えて、図１３（ｂ）に示すように、シールヘッド９０の第２
の凸部９１Ｂにおいて、Ｗ字部７１に対応する部分９１Ｂ１の幅Ｗ１を、Ｗ字部７１に対
応する部分９１Ｂ１を除く他の部分９１Ｂ２の幅Ｗ２よりも幅狭に（細く）設定すること
により、溶着強度の低い第２の熱溶着部８１Ｂにおいて、Ｗ字部７１は、第２の熱溶着部
８１Ｂの他の部分よりも、さらに幅狭に（さらに細く）形成されるため、第１の熱溶着部
８１Ａ及び第２の熱溶着部８１Ｂの中で、最も溶着強度が低くなっている。さらに、シー
ルヘッド９０の第２の凸部９１Ｂにおいて、図１３（ｃ）に示すように、Ｗ字部７１に対
応する部分９１Ｂ１の下端位置を他の部分９１Ｂ２の下端位置よりも高く設定することに
より、第２の熱溶着部８１Ｂにおいて、Ｗ字部７１の溶着強度をより一層低くすることが
できる。 Further, as shown in FIG. 12, in the seal head 90, the lower end of the inner second convex portion 91B is set to a position higher than the lower end of the first convex portion 91A, or the second heat welding portion 81B is formed. By forming the upper surface 81B1 of the corresponding flange portion 22 at a position lower than the upper surface 81A1 corresponding to the first heat-welded portion 81A, the second heat than the welding strength of the first heat-welded portion 81A is formed. The welding strength of the welded portion 81B can be set low. In addition, in the seal head 90, by setting the width of the second convex portion 91B to be smaller (thinner) than the width of the first convex portion 91A, the welding strength of the second heat welding portion 81B is set to the first heat It can be set lower than the welding strength of the welded portion 81A. In addition, as shown in FIG.
By setting the width W1 of the portion 91B1 corresponding to the W-shaped portion 71 to be narrower (thinner) than the width W2 of the other portion 91B2 excluding the portion 91B1 corresponding to the W-shaped portion 71 in the convex portion 91B. In the second heat-welded portion 81B having a low welding strength, the W-shaped portion 71 is formed to be narrower (thinner) than the other portions of the second heat-welded portion 81B. The welding strength is the lowest among the heat welding portion 81A and the second heat welding portion 81B. Further, in the second convex portion 91B of the seal head 90, as shown in FIG. 13C, the lower end position of the portion 91B1 corresponding to the W-shaped portion 71 should be set higher than the lower end positions of the other portions 91B2. As a result, the welding strength of the W-shaped portion 71 can be further reduced in the second heat welding portion 81B.

この第４実施形態においても、第２の熱溶着部８１Ｂの特にＷ字部７１にて蓋材５０を
剥離させ、前述した第１実施形態に係る凹部２６（図２参照）に相当する部分である非熱
溶着部８２を通ってきた蒸気を所定の蒸気排出部２５に誘導して、外部へ排出することが
でき、内容物１１が漏れにくい構造において、蒸気を蒸気排出部２５から良好に排出する
ことができる。 Also in the fourth embodiment, the lid member 50 is peeled off at the W-shaped portion 71 of the second heat-welded portion 81B, and the portion corresponding to the recess 26 (see FIG. 2) according to the first embodiment described above is removed. The steam that has passed through a certain non-heat-welding section 82 can be guided to a predetermined steam discharging section 25 and discharged to the outside, and the steam can be satisfactorily discharged from the steam discharging section 25 in a structure in which the contents 11 are unlikely to leak. can do.

以上、実施形態を用いて本発明を説明したが、本発明の技術的範囲は上記実施形態に記
載の範囲には限定されないことは言うまでもない。例えば、第１及び第２実施形態におい
て、第２の熱溶着部２３ＢのＶ字部２７を第３及び第４実施形態のＷ字部７１で置き換え
てもよいし、逆に、第３及び第４実施形態において、第２の熱溶着部２３Ｂ又は第２の熱
溶着部８１ＢのＷ字部７１を第１及び第２実施形態のＶ字部２７で置き換えてもよい。さ
らには、第１及び第２実施形態において、リブ状の第１の熱溶着部２３Ａ及び第２の熱溶
着部２３Ｂを第４実施形態の帯状の第１の熱溶着部８１Ａ及び第２の熱溶着部８１Ｂで置
き換えてもよい。このように、上記実施形態に、多様な変更又は改良を加えることが可能
であることが当業者に明らかである。またそのような変更又は改良を加えた形態も本発明
の技術的範囲に含まれ得ることが、特許請求の範囲の記載から明らかである。 Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. For example, in the first and second embodiments, the V-shaped portion 27 of the second heat-welded portion 23B may be replaced with the W-shaped portion 71 of the third and fourth embodiments, or conversely, the third and the third. In the fourth embodiment, the W-shaped portion 71 of the second heat-welded portion 23B or the second heat-welded portion 81B may be replaced with the V-shaped portion 27 of the first and second embodiments. Furthermore, in the first and second embodiments, the rib-shaped first heat-welded portion 23A and the second heat-welded portion 23B are replaced with the strip-shaped first heat-welded portion 81A and the second heat-welded portion 23A of the fourth embodiment. It may be replaced with the welded portion 81B. As described above, it is obvious to those skilled in the art that various modifications and improvements can be added to the above-described embodiment. It is also apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

１０...電子レンジ用容器、１１...内容物、２０...容器本体（第１実施形態）、２１...開口、２２...フランジ部、２３Ａ...第１の熱溶着部（第１〜第３実施形態）、２３Ｂ...第２の熱溶着部（第１〜第３実施形態）、２４...突起部、２５...蒸気排出部、２６...凹部、２７...Ｖ字部（易剥離部）、２７ｂ...凹部、５０...蓋材、６０...容器本体（第２実施形態）、７０...容器本体（第３実施形態）、７１...Ｗ字部（易剥離部）、８０...容器本体（第４実施形態）、８１Ａ...第１の熱溶着部（第４実施形態）、８１Ｂ...第２の熱溶着部（第４実施形態）、８２...非熱溶着部 10... Container for microwave oven, 11... Contents, 20... Container body (first embodiment), 21... Opening, 22... Flange portion, 23A... First heat Welding portion (first to third embodiments), 23B... Second heat welding portion (first to third embodiments), 24... Projection portion, 25... Steam discharge portion, 26... .Concave portion, 27... V-shaped portion (easy peeling portion), 27b... Recessed portion, 50... Lid material, 60... Container main body (second embodiment), 70... Container main body (first 3), 71... W-shaped portion (easy peeling portion), 80... Container body (fourth embodiment), 81A... First heat-welded portion (fourth embodiment), 81B. .. Second heat-welded portion (fourth embodiment), 82... Non-heat-welded portion

Claims (14)

電子レンジ用容器であって、
上部に開口を有する容器本体と、
前記容器本体の前記開口から外側に延出するように形成されたフランジ部と、
熱溶着部において前記フランジ部に熱溶着された蓋材を備え、
前記熱溶着部は、前記フランジ部の平坦面に設けられた第１及び第２部位を備え、
第１部位は、第２部位よりも溶着強度が低い、電子レンジ用容器。 A container for a microwave oven,
A container body having an opening at the top,
A flange portion formed so as to extend outward from the opening of the container body,
In the heat-welded portion, a lid member is heat-welded to the flange portion,
The heat-welded portion includes first and second portions provided on the flat surface of the flange portion,
The first part is a microwave oven container having a lower welding strength than the second part. 請求項１に記載の電子レンジ用容器であって、
第１部位は、第２部位よりも幅が狭い、電子レンジ用容器。 The microwave oven container according to claim 1,
The first portion is a microwave oven container having a width narrower than that of the second portion. 請求項１又は請求項２に記載の電子レンジ用容器であって、
前記熱溶着部は、前記開口を囲むように設けられる、電子レンジ用容器。 The microwave oven container according to claim 1 or 2, wherein
The said heat-welding part is a container for microwave ovens provided so that the said opening may be enclosed. 請求項３に記載の電子レンジ用容器であって、
第１部位は、Ｗ字状である、電子レンジ用容器。 The microwave oven container according to claim 3,
The first part is a W-shaped container for a microwave oven. 電子レンジ用容器の製造方法であって、
容器本体の開口から外側に延出するように形成されたフランジ部に蓋材を熱溶着する工程を備え、
前記熱溶着は、シールヘッドの凸部を、前記蓋材を介して前記フランジ部に押し付けることによって行い、
前記凸部は、第１及び第２部位を備え、
前記熱溶着の際の、第１部位での押圧力は、第２部位での押圧力よりも小さい、方法。 A method of manufacturing a container for a microwave oven,
A step of heat-welding a lid member to a flange portion formed so as to extend outward from the opening of the container body,
The heat welding is performed by pressing the convex portion of the seal head against the flange portion via the lid member,
The convex portion includes first and second portions,
The pressing force at the first portion during the heat welding is smaller than the pressing force at the second portion. 請求項５に記載の方法であって、
前記凸部は、前記フランジ部の平坦面に押し付けられる、方法。 The method of claim 5, wherein
The method in which the convex portion is pressed against a flat surface of the flange portion. 請求項５又は請求項６に記載の方法であって、
第１部位の高さは、第２部位の高さよりも低い、方法。 A method according to claim 5 or claim 6,
The method, wherein the height of the first portion is lower than the height of the second portion. 請求項５〜請求項７の何れか１つに記載の方法であって、
第１部位の幅は、第２部位の幅よりも狭い、方法。 The method according to any one of claims 5 to 7, wherein
The method, wherein the width of the first portion is narrower than the width of the second portion. 請求項５〜請求項８の何れか１つに記載の方法であって、
前記凸部は、前記開口を囲むように前記フランジ部に押し付けられる、方法。 The method according to any one of claims 5 to 8, wherein
The method in which the convex portion is pressed against the flange portion so as to surround the opening. 請求項９に記載の方法であって、
第１部位は、Ｗ字状である、方法。 The method of claim 9, wherein
The method, wherein the first portion is W-shaped. 凸部を有するシールヘッドであって、
前記凸部は、第１及び第２部位を備え、
第１部位の高さは、第２部位の高さよりも低い、シールヘッド。 A seal head having a convex portion,
The convex portion includes first and second portions,
A seal head in which the height of the first portion is lower than the height of the second portion. 請求項１１に記載のシールヘッドであって、
第１部位の幅は、第２部位の幅よりも狭い、シールヘッド。 The seal head according to claim 11, wherein
A seal head in which the width of the first part is narrower than the width of the second part. 請求項１１又は請求項１２に記載のシールヘッドであって、
前記凸部は、環状である、シールヘッド。 The seal head according to claim 11 or claim 12,
The seal head is a seal head having an annular shape. 請求項１３に記載のシールヘッドであって、
第１部位は、Ｗ字状である、シールヘッド。 The seal head according to claim 13,
The first portion is a seal head having a W shape.
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