JP6777842B2 - Microwave oven container - Google Patents

Microwave oven container Download PDF

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Publication number
JP6777842B2
JP6777842B2 JP2015114225A JP2015114225A JP6777842B2 JP 6777842 B2 JP6777842 B2 JP 6777842B2 JP 2015114225 A JP2015114225 A JP 2015114225A JP 2015114225 A JP2015114225 A JP 2015114225A JP 6777842 B2 JP6777842 B2 JP 6777842B2
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heat
container
microwave oven
welded
lid material
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JP2016196329A (en
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久美雄 丸山
久美雄 丸山
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Kyoraku Co Ltd
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Kyoraku Co Ltd
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Priority to TW105103810A priority Critical patent/TWI674997B/en
Priority to CN201610096688.7A priority patent/CN106043963B/en
Priority to PCT/JP2016/061323 priority patent/WO2016163428A1/en
Publication of JP2016196329A publication Critical patent/JP2016196329A/en
Priority to JP2020042231A priority patent/JP7348655B2/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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Package Closures (AREA)
  • Cookers (AREA)

Description

本発明は、電子レンジ用容器に関する。 The present invention relates to a container for a microwave oven.

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 (see, for example, 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。容器本体は、そのフランジ部の上面において周方向に部分的に突出した第１の凸状部と、第１の凸状部の外側の第２の凸状部と、第１の凸状部と第２の凸状部の間に設けられ、フランジ部を上下に貫通する一又は二以上の貫通孔とを有する。 Patent Document 1 discloses a packaging container including a container body for storing the contents and a lid made of a plastic material for closing the opening of the container body. The container body includes a first convex portion that partially protrudes in the circumferential direction on the upper surface of the flange portion, a second convex portion that is outside the first convex portion, and a first convex portion. It is provided between the second convex portions and has one or more through holes that penetrate the flange portion up and down.

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 peels off at the first convex portion, and the internal pressure escapes through the through hole. Therefore, in the packaging container, when cooking the contents of food or the like in a microwave oven, it is not necessary to make a hole for letting steam escape or to peel off a part of the lid before cooking.

しかしながら、特許文献１の包装容器は、蓋体を溶着する２つの凸状部（第１の凸状部と第２の凸状部）の間の蒸気の通り道に、貫通孔を開けた構造であるため、食品の具材などの内容物が貫通孔から漏れるおそれがある。 However, the packaging container of Patent Document 1 has a structure in which a through hole is formed in the passage of steam between the two convex portions (the first convex portion and the second convex portion) for welding the lid. Therefore, the contents such as food ingredients may leak from the through holes.

特開２００９−１２０２４７号公報JP-A-2009-120247

本発明は、このような事情に鑑みてなされたものであり、その目的は、内容物の漏れをより防止できる構造において、蒸気を所定の蒸気排出部に誘導して外部へ排出できる電子レンジ用容器を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is for a microwave oven capable of guiding steam to a predetermined steam discharging portion and discharging it to the outside in a structure capable of further preventing leakage of contents. To provide a container.

本発明は、以下の構成によって把握される。
（１）本発明は、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、前記フランジ部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を除いて設けられ、前記開口を塞ぐフィルム状の蓋材に熱溶着される第１の熱溶着部と、前記第１の熱溶着部の内周側に凹部を形成するように設けられ、前記蓋材に熱溶着される第２の熱溶着部と、を備え、前記凹部が、前記第２の熱溶着部がいずれかの場所で剥離したとき、剥離した箇所からの蒸気を前記蒸気排出部へ誘導することを特徴とする。 The present invention is grasped by the following configuration.
(1) The present invention is a container for a microwave oven, the container body having an opening at the top, a flange portion formed so as to extend outward from the opening of the container body, and the upper surface of the flange portion. A first heat-welding portion, which is provided except for a steam discharging portion cut out to discharge steam from the entire circumference of the above, and is heat-welded to a film-like lid material that closes the opening, and the first It is provided so as to form a recess on the inner peripheral side of the heat-welded portion, and includes a second heat-welded portion that is heat-welded to the lid material, and the recess is any one of the second heat-welded portions. When peeled at the above-mentioned place, the steam from the peeled place is guided to the steam discharge part.

（２）本発明は、上記（１）の構成において、前記第１の熱溶着部及び前記第２の熱溶着部がリブ状に形成されることを特徴とする。 (2) The present invention is characterized in that, in the configuration of (1) above, the first heat-welded portion and the second heat-welded portion are formed in a rib shape.

（３）本発明は、上記（２）の構成において、前記第２の熱溶着部が、前記蓋材との溶着強度が前記第２の熱溶着部の他の部分と前記蓋材との溶着強度よりも低い易剥離部を有することを特徴とする。 (3) In the present invention, in the configuration of the above (2), the second heat-welded portion is welded to the lid material with the other portion of the second heat-welded portion having a welding strength to the lid material. It is characterized by having an easily peeling portion lower than the strength.

（４）本発明は、上記（３）の構成において、前記易剥離部が、前記蒸気排出部に対応する位置に設けられることを特徴とする。 (4) The present invention is characterized in that, in the configuration of (3) above, the easily peelable portion is provided at a position corresponding to the steam discharge portion.

（５）本発明は、上記（３）又は（４）の構成において、前記易剥離部が、平面視において、外側に向かって閉塞するＶ字状に形成されることを特徴とする。 (5) The present invention is characterized in that, in the configuration of (3) or (4) above, the easily peelable portion is formed in a V shape that closes outward in a plan view.

（６）本発明は、上記（３）又は（４）の構成において、前記易剥離部が、平面視において、外側に向かって閉塞するＷ字状に形成されることを特徴とする。 (6) The present invention is characterized in that, in the configuration of (3) or (4) above, the easily peelable portion is formed in a W shape that closes outward in a plan view.

（７）本発明は、上記（３）から（６）のいずれか１つの構成において、前記易剥離部が、断面視において、外側に向かって下方へ傾斜することを特徴とする。 (7) The present invention is characterized in that, in any one of the above (3) to (6), the easily peelable portion is inclined downward toward the outside in a cross-sectional view.

（８）本発明は、上記（１）の構成において、前記第１の熱溶着部及び前記第２の熱溶着部が帯状に形成されることを特徴とする。 (8) The present invention is characterized in that, in the configuration of the above (1), the first heat-welded portion and the second heat-welded portion are formed in a band shape.

（９）本発明は、上記（８）の構成において、前記第２の熱溶着部が、前記蓋材との溶着強度が前記第２の熱溶着部の他の部分と前記蓋材との溶着強度よりも低い易剥離部を有することを特徴とする。 (9) In the present invention, in the configuration of the above (8), the second heat-welded portion is welded to the lid material with the other portion of the second heat-welded portion having a welding strength to the lid material. It is characterized by having an easily peeling portion lower than the strength.

（１０）本発明は、上記（９）の構成において、前記易剥離部が、前記蒸気排出部に対応する位置に設けられることを特徴とする。 (10) The present invention is characterized in that, in the configuration of (9) above, the easily peelable portion is provided at a position corresponding to the steam discharge portion.

（１１）本発明は、上記（９）又は（１０）の構成において、前記易剥離部が、平面視において、外側に向かって閉塞するＶ字状に形成されることを特徴とする。 (11) The present invention is characterized in that, in the configuration of (9) or (10) above, the easily peelable portion is formed in a V shape that closes outward in a plan view.

（１２）本発明は、上記（９）又は（１０）の構成において、前記易剥離部が、平面視において、外側に向かって閉塞するＷ字状に形成されることを特徴とする。 (12) The present invention is characterized in that, in the configuration of (9) or (10) above, the easily peelable portion is formed in a W shape that closes outward in a plan view.

（１３）本発明は、上記（１）から（１２）のいずれか１つの構成において、前記第２の熱溶着部が、断面視において、前記蒸気排出部に対応する位置に前記容器本体の底に向かって傾斜する凹部を有することを特徴とする。 (13) In the present invention, in any one of the above (1) to (12), the bottom of the container body is located at a position where the second heat welding portion corresponds to the steam discharge portion in a cross-sectional view. It is characterized by having a recess that inclines toward.

（１４）本発明は、上記（１）から（１３）のいずれか１つの構成において、さらに、前記フランジ部の前記蒸気排出部の外側に対向する位置に、減圧時に前記容器本体の内部に付着しないように前記蓋材を係止する突起部を備えることを特徴とする。 (14) The present invention adheres to the inside of the container body at the time of depressurization at a position of the flange portion facing the outside of the steam discharge portion in any one of the above configurations (1) to (13). It is characterized by providing a protrusion for locking the lid material so as not to prevent the lid material from being locked.

本発明によれば、内容物の漏れをより防止できる構造において、蒸気を所定の蒸気排出部に誘導して外部へ排出できる電子レンジ用容器を提供することができる。 According to the present invention, it is possible to provide a microwave oven container capable of guiding steam to a predetermined steam discharging portion and discharging it to the outside in a structure capable of further preventing leakage of contents.

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 the microwave oven which concerns on 1st Embodiment of this 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 which concerns on 1st Embodiment. 図１のＡ部拡大図である。It is an enlarged view of the part A of FIG. 図２のＢ−Ｂ線断面図である。FIG. 2 is a cross-sectional view taken along the line BB of FIG. 図２のＣ−Ｃ線断面図である。FIG. 2 is a cross-sectional view taken along the line CC 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。It is an operation diagram of the microwave oven container which concerns on 1st Embodiment, and is the figure which shows the state in which 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。It is an operation diagram of the container for the microwave oven which concerns on 1st Embodiment, and is the figure which shows the state of peeling off a lid material. 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 which concerns on 2nd Embodiment of this 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 which concerns on 3rd Embodiment of this invention. 図９のＤ−Ｄ線断面図である。9 is a cross-sectional view taken along the line DD 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 which concerns on 4th Embodiment of this invention. 図１１のＥ−Ｅ線断面図である。11 is a cross-sectional view taken along the line EE 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 a seal head for forming a first heat-welded portion and a second heat-welded portion according to a fourth embodiment of the present invention, and (b) is an enlarged view of part F of (a). (C) is a sectional view taken along line GG 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, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. The same elements are numbered the same throughout the description of the embodiment.

（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２０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 has a container body 20 having an opening 21 and being filled with the contents 11 from the opening 21, and a film-shaped lid material 50 for closing the opening 21 as main elements. To do. Both the container body 20 and the lid material 50 are made of a resin material. The content 11 housed in the container body 20 is various foods or the like, and any kind is arbitrary as long as it is heated by 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２２に備える。 Further, the microwave oven container 10 includes a flange portion 22 and a first heat-welded portion 23A and a second heat-welded portion 23B formed on the upper surface of the flange portion 22 and heat-welded to the lid material 50. Be prepared. Further, the microwave oven container 10 is provided with a protrusion 24 for locking the lid member 50 on the flange portion 22.

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 housing portion 20b having a bottom 20a. The accommodating portion 20b, the bottom 20a, and the opening 21 exhibit a substantially quadrangle (in this example, a substantially square) 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”) in which the first heat welding portion 23A and the second heat welding portion 23B are provided, and the accommodating portion 20b. The corners 22b are provided at positions corresponding to the four corners of the above. Each corner portion 22b is connected to the inner portion 22a via a step 22c, and is formed at a position one step 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。 In anticipation of warpage during molding of the container body 20, the inner portion 22a may be inclined downward at an angle θ1 with respect to the horizontal plane H toward the extending end of the flange portion 22 (see FIG. 4). .. Such an inclination of the flange portion 22 can be formed in substantially the same manner over 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。 Return to FIG. As shown in FIG. 1, the lid material 50 has an outer circumference substantially the same size as the outer circumference of the flange portion 22. The lid material 50 closes the opening 21 and closes the accommodating portion by being heat-welded (sealed) to the first heat-welding portion 23A and the second heat-welding portion 23B after the contents 11 are filled in the accommodating 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 welding portion 23A is ribbed on the entire circumference of the upper surface of the inner portion 22a of the flange portion 22 except for the steam discharge portion 25 cut out for discharging steam. It is formed in a shape and is heat-welded to the lid material 50. In this example, the steam discharge portion 25 is provided near the inside of one corner portion 22b of the flange portion 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２３Ｂ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 a recess 26 on the inner peripheral side of the first heat-welded portion 23A, and is heat-welded to the lid material 50. The second heat welding portion 23B is formed over the entire circumference of the upper surface of the inner portion 22a of the flange portion 22. The second heat welding portion 23B is formed in a substantially quadrangular 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. The second heat-welded portion 23B has a V-shaped portion 27 (easily peelable portion) facing outward at a position corresponding to the steam 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２３Ｂ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２０ｂ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 upper surface 23B1 of the second heat-welded portion 23B is formed at a position lower than the upper surface 23A1 of the first heat-welded portion 23A by the dimension h. As a result, when the lid material 50 is pressed against the first heat-welding portion 23A and the second heat-welding portion 23B from above with the seal bar (not shown), the seal bar is pressed against the second heat-welding portion 23B. Since the pressure is smaller than the pressing force of the seal bar against the first heat-welding portion 23A, the welding strength with the lid material 50 at the second heat-welding portion 23B is equal to that of the lid material 50 at the first heat-welding portion 23A. It is lower than the welding strength of. As a result, when the microwave oven container 10 is heated in a microwave oven and the vapor pressure in the accommodating portion 20b rises to reach a predetermined pressure, the lid material 50 is subjected to the sealing surface (upper surface) of the first heat welding portion 23A. Prior to 23A1), it is peeled off at any place on the sealing surface (upper surface 23B1) of the second heat-welded portion 23B. That is, in the first heat-welding portion 23A and the second heat-welding portion 23B, when the vapor pressure in the accommodating portion 20b reaches a predetermined pressure, the sealing property between the first heat-welding portion 23A and the lid material 50 Is maintained, but the sealing property between the second heat-welded portion 23B and the lid material 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。 By making the width of the second heat-welding portion 23B smaller than the width of the first heat-welding portion 23A, the welding strength in the second heat-welding portion 23B can be increased by welding in the first heat-welding 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 recess 26 is formed in a groove shape between the first heat welding portion 23A and the second heat welding portion 23B, and the vapor pressure in the accommodating portion 20b reaches a predetermined pressure, and the second heat welding portion When the 23B is peeled from the lid material 50 at any place, it has a function of guiding the steam from the peeled place 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 be closed (toward the outside) toward one corner portion 22b of the flange portion 22 in a plan view (see FIG. 2). As a result, when the user picks the end portion of the lid material 50 (in this example, the corner portion 50a of the lid material 50 shown in FIG. 1) and pulls it up to peel the lid material 50 from the V-shaped portion 27. Since the force is concentrated on the tip 27a side of the V-shaped portion 27, the lid material 50 can be easily peeled off even 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 material 50 is easily peeled off by peeling due to an increase in vapor pressure or peeling by the user, at least the second heat-welded portion 23B of the container body 20 and at least the back surface of the lid material 50. Is preferably a combination of materials that requires less force for peeling. As a combination of materials that can be easily peeled off, for example, a material obtained by mixing polyethylene (PE) and polypropylene (PP) is used for at least the second heat-welded portion 23B of the container body 20, and at least on the back surface of the lid material 50. Can use a combination of materials that are weldable but different from each other, such as using 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２２ｂ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２７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 is inclined downward (toward the outside) at an angle θ2 toward one corner portion 22b of the flange portion 22 in a cross-sectional view. Due to this inclination, the welding strength at the V-shaped portion 27 can be set to be even smaller than 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 recess 27b which is inclined at an angle θ3 toward the bottom 20a of the accommodating portion 20b inside the V-shaped portion 27 in a cross-sectional view. By forming such a recess 27b, even if steam escapes from the steam discharge portion 25 and the accommodating portion 20b is depressurized, the recess 27b ensures communication between the inside (accommodation portion 20b) of the container body 20 and the outside. Since it is secured, it is possible to prevent the accommodating portion 20b from being in a vacuum state. By the action of the recess 27b, it is possible to prevent the lid material 50 from adhering to the content 11 when the pressure of the accommodating portion 20b is reduced.

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１１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。 Return to FIG. As shown in FIG. 3, the protrusion 24 is provided on the corner 22b at a position facing the outside of the steam discharge portion 25. The protrusion 24 is arranged in the vicinity of the steam discharge portion 25, and has a conical base portion 24a that tapers upward and a spherical 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 portion 24b. The protruding portion 24 acts to lock the corner portion 50a of the lid member 50 when the pressure of the accommodating portion 20b is reduced. In this way, by providing the protrusion 24 together with the recess 27b described above in the vicinity of the steam discharge portion 25, the lid material 50 adheres to the content 11 when the pressure of the accommodating portion 20b is reduced, in combination with the action of the recess 27b. This can be further prevented. The configuration of the protrusion 24 is not particularly limited to this example, and is arbitrary as long as the corner portion 50a of the lid member 50 can be locked when the pressure of the accommodating portion 20b is reduced.

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。 Subsequently, 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 a microwave oven, the lid material 50 swells due to an increase in the vapor pressure generated in the accommodating portion 20b. When the lid material 50 swells, the force concentrates on the sealing surface of the second heat-welding portion 23B, and when the vapor pressure reaches a predetermined pressure, any place on the sealing surface of the second heat-welding portion 23B. 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 steam from the peeled portion is guided to the steam discharge section 25 by the recess 26, and is discharged to the outside from the steam discharge section 25. In this example, of the second heat-welded portion 23B whose welding strength is lower than that of the first heat-welding portion 23A, the V-shaped portion 27 whose welding strength is set to be even lower due to the inclination is likely to cause peeling. In this case, as shown by the arrow (2) in FIG. 6, steam is satisfactorily released from the portion (V-shaped portion 27) closer to the steam discharge portion 25.

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 the arrow (3) in FIG. 7, the user picks up the corner portion 50a of the lid material 50 corresponding to the steam discharge portion 25, lifts it, and pulls it up to lift the lid material 50 to the protrusions 24 and V. It is peeled off from the character portion 27. At this time, since the V-shaped portion 27 is formed so as to close outward, the user can start peeling the lid material 50 with a smaller force and easily remove the lid material 50 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 will be described above. According to the first embodiment, the steam that has passed through the recess 26 between the first heat welding portion 23A and the second heat welding portion 23B is guided to the predetermined steam discharging portion 25 and discharged to the outside. Can be done. For this reason, a structure in which the contents 11 are less likely to leak can be obtained as compared with a conventional structure in which a through hole is formed in a steam passage between two convex portions for welding the lid, and in such a structure, steam is released. It can be satisfactorily discharged from the steam discharge unit 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 with reference to FIG. The above-mentioned storage portion 20b (see FIG. 2) of the container body 20 has a substantially square planar shape, but the planar shape of the storage portion 20b can be selected from various shapes such as a circle and an oval shape in addition to the substantially square shape. is there.

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２３Ａ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２２ｂ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 body 60 according to the second embodiment, the planar shape of the accommodating portion 20b is circular, 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 outside of the inner portion 22a via a step 22c. A first heat-welded portion 23A and a second heat-welded portion 23B are formed on the inner portion 22a of the flange portion 22 with the recess 26 interposed therebetween. A steam discharge portion 25 and a V-shaped portion 27 are provided at positions corresponding to one corner portion 22b of the flange portion 22, and further, at a position of the corner portion 22b facing the outside of the steam discharge portion 25. Is provided with a protrusion 24.

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 accommodating portion 20b having a circular planar shape as described above, between the first heat welding portion 23A and the second heat welding portion 23B, similarly to the container body 20 (see FIG. 2) described above. The steam that has passed through the recess 26 of the above 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 less likely to leak, the steam can be satisfactorily discharged from the steam discharge unit 25. 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１０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)
Subsequently, the container body according to the third embodiment of the present invention will be described with reference to 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 (easily peelable portion), and the planar shape of the accommodating portion 20b is a substantially oval shape with rounded corners. It is said. As shown in FIGS. 9 and 10, the container body 70 has an accommodating portion 20b having a substantially rectangular planar shape and an opening 21. The flange portion 22 extending from the opening 21 is provided with a rib-shaped first heat-welding portion 23A and a rib-shaped second heat-welding portion 23B. The second heat welded 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 steam discharge portion 25 in a plan view. The W-shaped portion 71 has two tips 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 lid material 50 is peeled off from the W-shaped portion 71 by picking and pulling up the lid material 50, the user concentrates the force on at least one of the two tips 71a of the W-shaped portion 71. The lid material 50 can be easily peeled off even with a small force. Further, when the lid material 50 is automatically opened due to an increase in vapor pressure, stress is concentrated on the base end 71b of the W-shaped portion 71, so that the W-shaped portion 71 is more likely to be peeled off. Further, the W-shaped portion 71 is also inclined downward (toward the outside) at an angle θ2 (see FIG. 10) toward one corner portion 22b of the flange portion 22 in a cross-sectional view. Due to this inclination, the welding strength in the W-shaped portion 71 can be set to be even smaller than the other portions of the second heat-welding portion 23B, similarly to the V-shaped portion 27 described above.

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２３Ａ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。 Further, 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. It can be set even lower than the welding strength of the heat welding portion 23A. In addition, in the second heat-welded portion 23B having such 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 23B. 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 this third embodiment, the lid material 50 is peeled off at the W-shaped portion 71 of the second heat welding portion 23B, and the recess 26 between the first heat welding portion 23A and the second heat welding portion 23B is formed. 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 less likely to leak, the steam can be satisfactorily discharged 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２２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, the container body according to the fourth embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the fourth embodiment, in the third embodiment, the first heat-welded portion 81A and the second heat-welded portion 81B are band-shaped. As shown in FIGS. 11 and 12, the container body 80 has a housing portion 20b and an opening 21 having a substantially rectangular planar shape. The flange portion 22 extending from the opening 21 has a strip-shaped first heat-welded portion 81A and a strip-shaped second heat-welded portion 81B (both welded portions are flat portions shown by dots in FIG. 11). It is formed. That is, the first heat-welding portion 81A and the second heat-welding portion 81B are not rib-shaped, and a space (non-heat) through which steam can pass between the first heat-welding portion 81A and the second heat-welding portion 81B. It is formed in a flat shape within the range where the welded portion 82) is formed. Further, the second heat welding portion 81B has a W-shaped portion 71 which is closed outward at a position corresponding to the steam discharge portion 25 and has a flat shape 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 heat-welded seal head 90 (see FIGS. 12 and 13 (a) to 13 (c)). can do. That is, the seal head 90 has a first convex portion 91A corresponding to the first heat welding portion 81A and a second convex portion 91B corresponding to the second heat welding portion 81B (both convex portions are shown in FIG. 13A). ) And (the portion indicated by the diagonal line in (b)), and the flat lower surface of each of the first convex portion 91A and the second convex portion 91B is flattened by the flange portion 22 via the lid member 50. By pressing against the upper surface, the first heat-welded portion 81A and the second heat-welded portion 81B welded to the lid material 50 are formed on the upper surface of the flange portion 22. Note that FIG. 11 shows the container body 80 after the lid material 50 is heat-welded to the flange portion 22, and the first heat-welded portion 81A and the second heat-welded portion 81B are shown by solid lines in an easy-to-understand manner. , The lid material 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 may be set at a position higher than the lower end of the first convex portion 91A, or may be formed on the second heat welding portion 81B. 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 welding portion 81A, the second heat is higher than the welding strength of the first heat welding portion 81A. The welding strength of the welded portion 81B can be set low. Further, 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 even lower than the welding strength of the welding portion 81A. In addition, as shown in FIG. 13B, in the second convex portion 91B of the seal head 90, the width W1 of the portion 91B1 corresponding to the W-shaped portion 71 is excluded from the portion 91B1 corresponding to the W-shaped portion 71. By setting the width narrower (thinner) than the width W2 of the other portion 91B2, the W-shaped portion 71 is the other portion of the second heat welding portion 81B in the second heat welding portion 81B having a low welding strength. Since it is formed to be narrower (thinner) than that of the first, the welding strength is the lowest among the first 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 is set higher than the lower end position of the other portion 91B2. As a result, in the second heat welding portion 81B, the welding strength of the W-shaped portion 71 can be further reduced.

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 this fourth embodiment, the lid material 50 is peeled off at the W-shaped portion 71 of the second heat welding portion 81B, and the portion corresponding to the recess 26 (see FIG. 2) according to the first embodiment described above. The steam that has passed through a certain non-heat welding unit 82 can be guided to a predetermined steam discharge unit 25 and discharged to the outside, and the steam is satisfactorily discharged from the steam discharge unit 25 in a structure in which the contents 11 are less likely 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 welding portion 23B may be replaced with the W-shaped portion 71 of the third and fourth embodiments, and conversely, the third and third embodiments may be replaced. 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. Further, in the first and second embodiments, the rib-shaped first heat-welded portion 23A and the second heat-welded portion 23B are combined with the strip-shaped first heat-welded portion 81A and the second heat of the fourth embodiment. It may be replaced with the welded portion 81B. Thus, it will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. Further, it is clear from the description of the claims that the form to which such a modification or improvement is added may 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 ... 2nd heat welding part (1st to 3rd embodiments), 24 ... protrusion, 25 ... steam discharge part, 26 ... recess, 27 ... V-shaped part (easy peeling part), 27b ... recess, 50 ... Lid material, 60 ... container body (second embodiment), 70 ... container body (third embodiment), 71 ... W-shaped portion (easily peelable portion), 80 ... container body (fourth embodiment), 81A ... 1 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、
前記フランジ部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を除いて設けられ、前記開口を塞ぐフィルム状の蓋材に熱溶着される第１の熱溶着部と、
前記第１の熱溶着部の内周側に非熱溶着部を形成するように設けられ、前記蓋材に熱溶着される第２の熱溶着部と、を備え、
前記第２の熱溶着部が、前記蓋材との溶着強度が前記第２の熱溶着部の他の部分と前記蓋材との溶着強度よりも低い易剥離部を有し、
前記易剥離部が、前記蒸気排出部に対応する位置に設けられ、
前記非熱溶着部が、前記第２の熱溶着部がいずれかの場所で剥離したとき、剥離した箇所からの蒸気を前記蒸気排出部へ誘導することを特徴とする電子レンジ用容器。 A container for a microwave oven
The container body with an opening at the top and
A flange portion formed so as to extend outward from the opening of the container body,
A first heat-welded portion that is provided except for a steam discharge portion cut out to discharge steam from the entire circumference of the upper surface of the flange portion and is heat-welded to a film-shaped lid material that closes the opening. ,
A second heat-welded portion provided so as to form a non-heat-welded portion on the inner peripheral side of the first heat-welded portion and heat-welded to the lid material is provided.
The second heat-welding portion has an easily peelable portion whose welding strength with the lid material is lower than the welding strength between the other portion of the second heat-welding portion and the lid material.
The easily peelable portion is provided at a position corresponding to the steam discharge portion.
A container for a microwave oven, wherein the non-heat-welded portion guides steam from the peeled portion to the steam discharge portion when the second heat-welded portion is peeled off at any place. 前記第１の熱溶着部及び前記第２の熱溶着部がリブ状に形成されることを特徴とする請求項１に記載の電子レンジ用容器。 The container for a microwave oven according to claim 1, wherein the first heat-welded portion and the second heat-welded portion are formed in a rib shape. 前記易剥離部は、前記第２の熱溶着部の他の部分より幅狭に形成されることで、前記蓋材との溶着強度が前記第２の熱溶着部の他の部分と前記蓋材との溶着強度よりも低いことを特徴とする請求項１又は２に記載の電子レンジ用容器。 The easily peelable portion is formed to be narrower than the other portion of the second heat-welded portion, so that the welding strength with the lid material is higher than that of the other portion of the second heat-welded portion and the lid material. The microwave oven container according to claim 1 or 2, wherein the strength is lower than the welding strength with and from. 前記易剥離部が、平面視において、前記第１の熱溶着部の切り欠かれた部分よりも外側まで延在するように設けられていることを特徴とする請求項１から３のいずれか1項に記載の電子レンジ容器。 Any one of claims 1 to 3, wherein the easily peelable portion is provided so as to extend to the outside of the notched portion of the first heat-welded portion in a plan view. Microwave oven container as described in the section. 前記易剥離部が、平面視において、外側に向かって閉塞するＶ字状に形成されることを特徴とする請求項１から４のいずれか1項に記載の電子レンジ用容器。 The microwave oven container according to any one of claims 1 to 4, wherein the easily peelable portion is formed in a V shape that closes outward in a plan view. 前記易剥離部が、平面視において、外側に向かって閉塞するＷ字状に形成されることを特徴とする請求項１から４のいずれか1項に記載の電子レンジ用容器。 The container for a microwave oven according to any one of claims 1 to 4, wherein the easily peelable portion is formed in a W shape that closes outward in a plan view. 前記易剥離部が、断面視において、外側に向かって下方へ傾斜することを特徴とする請求項１から５のいずれか1項に記載の電子レンジ用容器。 The microwave oven container according to any one of claims 1 to 5, wherein the easily peelable portion is inclined downward toward the outside in a cross-sectional view. 前記第１の熱溶着部及び前記第２の熱溶着部が帯状に形成されることを特徴とする請求項１に記載の電子レンジ用容器。 The microwave oven container according to claim 1, wherein the first heat-welded portion and the second heat-welded portion are formed in a band shape. 前記易剥離部は、前記第２の熱溶着部の他の部分より幅狭に形成されることで、前記蓋材との溶着強度が前記第２の熱溶着部の他の部分と前記蓋材との溶着強度よりも低いことを特徴とする請求項８に記載の電子レンジ用容器。 The easily peelable portion is formed to be narrower than the other portion of the second heat-welded portion, so that the welding strength with the lid material is higher than that of the other portion of the second heat-welded portion and the lid material. The microwave oven container according to claim 8, wherein the container has a welding strength lower than that of the microwave oven. 前記易剥離部が、平面視において、前記第１の熱溶着部の切り欠かれた部分よりも外側まで延在するように設けられていることを特徴とする請求項８又は９に記載の電子レンジ容器。 The electron according to claim 8 or 9, wherein the easily peelable portion is provided so as to extend to the outside of the notched portion of the first heat-welded portion in a plan view. Range container. 前記易剥離部が、平面視において、外側に向かって閉塞するＶ字状に形成されることを特徴とする請求項８から１０のいずれか1項に記載の電子レンジ用容器。 The microwave oven container according to any one of claims 8 to 10, wherein the easily peelable portion is formed in a V shape that closes outward in a plan view. 前記易剥離部が、平面視において、外側に向かって閉塞するＷ字状に形成されることを特徴とする請求項８から１０のいずれか1項に記載の電子レンジ用容器。 The container for a microwave oven according to any one of claims 8 to 10, wherein the easily peelable portion is formed in a W shape that closes outward in a plan view. 前記第２の熱溶着部の内周側において、断面視において、前記蒸気排出部に対応する位置に前記容器本体の底に向かって傾斜する凹部を有することを特徴とする請求項１から１２のいずれか１項に記載の電子レンジ用容器。 Claims 1 to 12, characterized in that , on the inner peripheral side of the second heat welding portion , a recess inclined toward the bottom of the container body is provided at a position corresponding to the steam discharge portion in a cross-sectional view. The container for a microwave oven according to any one item. さらに、前記フランジ部の前記蒸気排出部の外側に対向する位置に、減圧時に前記容器本体の内部に付着しないように前記蓋材を係止する突起部を備えることを特徴とする請求項１から１３のいずれか１項に記載の電子レンジ用容器。 Further, according to claim 1, a protrusion for locking the lid material is provided at a position of the flange portion facing the outside of the steam discharge portion so as not to adhere to the inside of the container body during decompression. 13. The container for a microwave oven according to any one of 13.
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