JP2006240632A

JP2006240632A - Lidded container

Info

Publication number: JP2006240632A
Application number: JP2005055184A
Authority: JP
Inventors: Kazunori Hashimoto; 和紀橋本; Shigeo Iizuka; 茂雄飯塚
Original assignee: Yoshino Kogyosho Co Ltd
Current assignee: Yoshino Kogyosho Co Ltd
Priority date: 2005-02-28
Filing date: 2005-02-28
Publication date: 2006-09-14
Anticipated expiration: 2025-02-28
Also published as: JP4462496B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lidded container which has an air groove to ensure rapid supply/release of air and surely prevent the splash of a content liquid. <P>SOLUTION: The container consists of a container body 2 which has a flange 8 annexed to the upper end of a cylinder wall with a closed lower end and an air groove 16 extended open from a part of the flange close to the outer periphery of the flange to the inner edge of the peripheral wall of the container body 2, and a sheet lid 40 which is pasted peelably on the top face of the flange 8. The air groove 16 is formed in such a way that a peripheral groove 20 is extended arcuately, with gaps formed between the outer/inner edges of the flange 8, from the tip of a first radial groove 18, which extends inward from a first end 24 close to the outer periphery of the flange 8, and a second radial groove 22 following the peripheral groove 20 is projected inward to form an open second end 26 on the upper end of the inner surface of the container body peripheral wall 6. Each of joints between the first/second radial grooves 18, 22 and the peripheral groove 20 is made into a refracted angle part 28 that serves as a portion to reduce the energy of a liquid flowing back from the inside of the container 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、蓋付き容器、特に果実汁入りのフルーツなどの収納容器、或いはミルク入れ用の小容器として適した蓋付き容器に関する。 The present invention relates to a container with a lid, particularly a container with a lid suitable as a container for storing fruit juice-containing fruit or the like, or a small container for milk.

容器体の上面へシート蓋を貼着したこの種容器においては、シート蓋を剥離したときに、果実汁やミルクなどの内容液が外部に飛び出し、利用者の衣服に付着することがある。 In this type of container in which a sheet lid is attached to the upper surface of the container body, when the sheet lid is peeled off, the liquid contents such as fruit juice and milk may jump out and adhere to the clothes of the user.

この現象が起こる理由は、さまざまに考えられるが、その一つとして、充填した内容物の殺菌処理後の冷却に容器体内が負圧化しており、シート蓋の剥離により容器体内の負圧が解消され、急激な圧力変化を生ずることの反動として内容液が跳ね出すことが考えられる。 There are various reasons why this phenomenon occurs, but one of the reasons is that the inside of the container has become negative pressure due to cooling after sterilization of the filled contents, and the negative pressure inside the container has been eliminated by peeling the seat lid. Then, it is conceivable that the content liquid jumps out as a reaction to the sudden pressure change.

又、容器体上面へのシート蓋の貼着力に対抗して、シート蓋を斜め上方へ引き上げるとともにこの引き上げ力に抗して容器体を把持するため、シート蓋を剥離する操作の過程で上記貼着力が失われることで容器体を把持する手が動いて容器体が揺動し、内容液が飛び出すということもある。 In addition, the sheet lid is lifted diagonally upward against the upper surface of the container body, and the container body is gripped against the lifting force. When the attachment force is lost, the hand holding the container body may move, the container body may swing, and the content liquid may jump out.

更に容器体内部が負圧化されていないときでも、シート蓋を引き剥がす際に容器体胴部を圧搾することで内容液が飛び出すことがある。 Furthermore, even when the inside of the container body is not made negative, the content liquid may be ejected by squeezing the container body when the sheet lid is peeled off.

こうした問題に対してシート蓋を剥離する際に容器内外の負圧化を解消するために、容器体の周壁上端に付設した鍔部の上面全周に亘って、周方向の細溝を介して相互に連通させた多数の矩形状の外気導入用凹部を並設したものが知られている（特許文献１）。各外気導入用凹部の内端側は容器体内方へ開口しており、シート蓋の一側部を容器体上面の対応部分から剥がして部分的に開口させたときに、この開口部分を介した連通により容器内外の圧力差が解消され、内容液の飛出しを防止するように構成している。
特開平10−305861号 In order to eliminate the negative pressure inside and outside the container when peeling the sheet lid against such a problem, the entire upper surface of the collar attached to the upper end of the peripheral wall of the container body is surrounded by a circumferential narrow groove. There is known one in which a large number of rectangular external air introduction recesses that are in communication with each other are arranged in parallel (Patent Document 1). The inner end side of each outside air introduction recess is opened toward the inside of the container, and when one side part of the seat lid is peeled off from the corresponding part on the upper surface of the container body and partially opened, By communicating, the pressure difference between the inside and outside of the container is eliminated, and the content liquid is prevented from jumping out.
JP 10-305861

上述の外気導入用凹部は、鍔部の巾の半分程度の大きさなので、利用者がシート蓋を開く作業を素早く行うと、容器内外の圧力差が解消される前に容器体上面が開口され、内容液が飛び出してしまう可能性がある。 Since the above-described recess for introducing outside air is about half the width of the flange, when the user quickly opens the seat lid, the upper surface of the container body is opened before the pressure difference between the inside and outside of the container is resolved. , There is a possibility that the content liquid will jump out.

又、仮に外気導入用凹部の径方向の巾を長くとっても、シート蓋の剥離により外気導入用凹部の外端側が開放された時から容器体上面が開放される時までの間に、外気が流入したことの反動で容器体内の液体が上記外気導入用凹部を介して外部へ逆流するおそれがある。 Even if the outside air introduction recess is made wider in the radial direction, outside air flows between the time when the outer end side of the outside air introduction recess is opened due to the peeling of the seat lid and the time when the upper surface of the container body is opened. As a result, the liquid in the container may flow back to the outside through the external air introduction recess.

こうした液体飛出しを防止するために、特許文献１では各外気導入用凹部を細溝部でつないでシート蓋の一側部を剥がしたときに、細溝部を介して鍔部全周の外気導入用凹部から容器体内へ外気を供給している。即ち、シート蓋の一側部に開口した一つの外気導入用凹部から一対の細溝を介して鍔部全周に亘る他の外気導入用凹部を補助的な外気吹込み口として外気を吹き込むので、一つの外気導入用凹部のみで外気を導入する場合と比較して容器体内の負圧を速やかに解消することが期待される。 In order to prevent such liquid splashing, in Patent Document 1, when each side of the seat lid is peeled off by connecting each concave portion for introducing external air with a narrow groove portion, the outside air introduction for the entire circumference of the buttock through the narrow groove portion Outside air is supplied from the recess into the container. That is, since outside air is blown from one outside air introduction recess opened on one side of the seat lid through the pair of narrow grooves as other outside air introduction recesses around the collar part as auxiliary outside air blowing ports. It is expected that the negative pressure in the container body can be quickly eliminated as compared with the case where the outside air is introduced with only one outside air introduction recess.

しかしながらこの構成では、補助的な外気吹込み口は全て上記一対の細溝を通じて外気を吹き出すものであるので、これら細溝が外気導入路の狭隘部となり、外気吹込み口の開口面積の大きさから期待される程度には外気の導入を速やかに行なうことができない。 However, in this configuration, all the auxiliary outside air inlets blow outside air through the pair of narrow grooves, so that these narrow grooves serve as narrow portions of the outside air introduction path, and the size of the opening area of the outside air inlet is large. However, it is not possible to introduce outside air as quickly as expected.

そこで本発明は、空気の速やかな給排気を確保しつつ、内容液の飛出しを確実に防止するために、シート蓋貼着用の鍔部の外周寄り部分から周壁内縁へエア溝を開通し、このエア溝の一部に逆流液体の減勢用の屈折角部を形成した蓋付き容器を提供することを目的とする。 Therefore, the present invention is to open the air groove from the outer peripheral portion of the heel portion of the seat cover sticking to the inner edge of the peripheral wall in order to surely prevent the content liquid from jumping out while ensuring quick air supply and exhaust. It is an object of the present invention to provide a lidded container in which a refraction angle portion for reducing the backflow liquid is formed in a part of the air groove.

第1の手段は、下端閉塞の筒壁上端に鍔部８を付設するとともに、その鍔部の外周寄り部分から周壁内縁へエア溝16を開通した容器体２と、上記鍔部８上面に剥離可能に貼着させたシート蓋40とで構成され、上記エア溝16は、鍔部８外周寄りの第１端24から内方へ向かう第1径方向溝部18の先部より、鍔部８内外縁との間に間隙を存して円弧状に延びる周方向溝部20を介して第２径方向溝部22を内方へ突出し、容器体周壁６の内面上端に第２端26を開口するように形成するとともに、容器体２内からの逆流液体の減勢部として、第1、第2径方向溝部18,22と周方向溝部20との間の各接合部分を屈折角部28としており、この屈折角部を除くエア溝16の全長部分を同一巾とするとともに、屈折角部28の巾を残余のエア溝部分以上としており、更にエア溝16の深さをこのエア溝の全長に亘って同一としている。 The first means attaches the flange portion 8 to the upper end of the cylindrical wall closed at the lower end, and peels the container body 2 in which the air groove 16 is opened from the outer peripheral portion of the flange portion to the inner edge of the peripheral wall and the upper surface of the flange portion 8. The air groove 16 is formed by an adhesively attached sheet lid 40, and the air groove 16 is located inside and outside the collar portion 8 from the front end of the first radial groove portion 18 directed inward from the first end 24 near the outer periphery of the collar portion 8. The second radial groove portion 22 protrudes inward through a circumferential groove portion 20 extending in an arc shape with a gap between the edge and the second end 26 is opened at the inner surface upper end of the container body peripheral wall 6. In addition to the formation, each joint portion between the first and second radial groove portions 18 and 22 and the circumferential groove portion 20 serves as a refracting angle portion 28 as a depressing portion for the backflow liquid from inside the container body 2. The entire length of the air groove 16 excluding the refraction corner is the same width, the width of the refraction angle 28 is greater than the remaining air groove, and the depth of the air groove 16 is further increased. It is the same over the entire length of the air groove.

「エア溝」は、シート蓋の剥離する作業の途中で第1端の開放により容器内外を開通する。容器体内が負圧化されているときには、第１端から第２端へ外気が流入し、又、容器体の胴部圧搾などにより容器体内が高圧化したときには第２端から第１端へ容器体内空気が流出する。前者の場合には外気の導入の反動で内容液が飛び出す可能性があり、又、後者の場合には、高圧空気に続いて内容液が飛び出す可能性がある。これらの飛出しを防止するために、エア溝は、２つの径方向溝部と１つの周方向溝部と屈折角部とを有している。 The “air groove” opens and closes the container by opening the first end during the work of peeling the sheet lid. When the container body is under negative pressure, outside air flows from the first end to the second end, and when the container body is pressurized due to squeezing of the body of the container body, the container is moved from the second end to the first end. Body air flows out. In the former case, the content liquid may jump out due to the reaction of the introduction of outside air, and in the latter case, the content liquid may jump out following the high-pressure air. In order to prevent these protrusions, the air groove has two radial grooves, one circumferential groove, and a refraction angle.

「径方向溝部」は、鍔部の上面を容器体の半径方向に延びる溝部分であり、第1径方向溝部は鍔部の外周部に、又、第２径方向溝部は鍔部の内周部にそれぞれ周方向にずらして配置したものである。第１、第２径方向溝部は、鍔部全周のどこに形成してもよいが、予期される容器内の負圧又は高圧の大きさに応じて、エア溝全体で内容液の飛出しを防止できるように両溝間の距離をとることが望ましい。 The “radial groove portion” is a groove portion extending in the radial direction of the container body on the upper surface of the flange portion. The first radial groove portion is the outer periphery portion of the flange portion, and the second radial groove portion is the inner periphery of the flange portion. The parts are arranged so as to be shifted in the circumferential direction. The first and second radial groove portions may be formed anywhere on the entire circumference of the collar portion, but depending on the expected negative pressure or high pressure in the container, the content liquid can be ejected in the entire air groove. It is desirable to take a distance between both grooves so that it can be prevented.

「周方向溝部」は、鍔部の巾方向中間部分を円弧形状を延びるように形成すると良い。もっともその形状は適宜変更することができる。尚、「鍔部内外両縁との間に間隙を存して」というのは、周方向溝部が第1、第２端側を除いて容器体内部又は外部と連通していないことを意味するものとする。 The “circumferential groove” is preferably formed so that an intermediate portion in the width direction of the flange extends in an arc shape. However, the shape can be changed as appropriate. Note that “there is a gap between the inner and outer edges of the collar” means that the circumferential groove is not in communication with the inside or outside of the container except for the first and second end sides. Shall.

「屈折角部」は、直角とすることが望ましいが、直角に近い鈍角又は鋭角であっても構わない。尚、本明細書において、「屈折」とは、当該箇所において流路が折れるように曲がることをいうものとし、流路の流路が不連続に変化することで流路内を逆流する液体への抵抗を大とすることができる。具体的には、屈折角部と接続した円弧状乃至直線状の溝部分がその円弧状乃至直線状の流路ラインを保ちながら、屈折角部内へ連続していれば足り、屈折角部を構成する側壁面の内角部分及び外隅部分を多少丸く形成していても構わない。この屈折角部は他のエア溝部分以上に深さに対して巾広浅底に形成することが望ましい。 The “refractive angle portion” is preferably a right angle, but may be an obtuse angle or an acute angle close to a right angle. In this specification, “refraction” means that the flow path bends at the relevant location, and the flow path of the flow path discontinuously changes to a liquid that flows backward in the flow path. The resistance can be increased. Specifically, it is sufficient that the arc-shaped or linear groove portion connected to the refraction angle portion is continuous into the refraction angle portion while maintaining the arc-shaped or linear flow path line, and the refraction angle portion is configured. The inner corner portion and the outer corner portion of the side wall surface to be formed may be somewhat rounded. It is desirable to form the refracted corner portion at a shallow depth that is wider than the depth of the other air groove portions with respect to the depth.

尚、エア溝の主要部分を同一巾で同一深さとしたのは、少なくとも屈折角部を除くエア溝の流路面積をその長さ方向に対して一定にするためである。そうすることで空気が通り易くなり、容器内外の圧力差を速やかに解消することができる。 The reason why the main part of the air groove has the same width and the same depth is to make the flow area of the air groove at least excluding the refraction angle part constant with respect to its length direction. By doing so, it becomes easy for air to pass through and the pressure difference inside and outside the container can be quickly eliminated.

第２の手段は、上記第１の手段を有し、かつ上記エア溝16を、深さに対して巾広の浅溝状に形成している。 The second means includes the first means, and the air groove 16 is formed in a shallow groove shape that is wider than the depth.

エア溝を浅溝状とすることで、このエア溝内面とシート蓋の対応部分下面とで形成される空気流路は流路方向から見て偏平横長な断面形状となり、これにより逆流液体に対して大きな流路抵抗が担保される。 By making the air groove a shallow groove shape, the air flow path formed by the inner surface of the air groove and the lower surface of the corresponding portion of the seat lid has a flat and horizontally long cross-sectional shape when viewed from the flow path direction. Large channel resistance.

第３の手段は、上記第１の手段又は第２の手段を有し、かつ、少なくとも鍔部８の全周長さの半分程度の長さを有している。 The third means includes the first means or the second means, and has a length that is at least about half of the entire circumferential length of the flange portion 8.

第４の手段は、上記第１の手段乃至第３の手段の何れかを有し、かつ上記エア溝16として、上記鍔部８の後部外周寄り部分から左右両側部に亘って左右対称に形成した一対のエア溝を設けている。 The fourth means includes any one of the first to third means, and the air groove 16 is formed symmetrically from the rear outer peripheral portion of the flange portion 8 to the left and right side portions. A pair of air grooves is provided.

第１の手段に係る発明によれば、次の効果を奏する。
○エア溝16の周方向溝部20と第1、第２径方向溝部18,22との間の接続部部分を屈折角部28としたから、シート蓋40を剥離する際にエア溝16内を逆流する液体を、その屈折角部28の側壁面への衝突により減勢させ、エア溝16からの液体の飛出しを抑制することができる。
○上記周方向溝部20を円弧形状に形成したので、この周方向溝部20を逆流する液体にかかる遠心力によって、この液体と周方向溝部20外側面との摩擦抵抗が大となり、更にエア溝16から逆流液体を飛び出し難くすることができる。
○上記エア溝16は、その第１端24から第２端26までの全長に亘って同一深さとするとともに、上記屈折角部28を除く全長部分を同一巾に形成し、更にこの屈折角部28は残余の溝部分以上の巾を有するから、空気がエア溝16を通過し易く、このエア溝を介した吸気及び排気を速やかに行うことができる。 The invention according to the first means has the following effects.
○ Since the connecting portion between the circumferential groove portion 20 of the air groove 16 and the first and second radial groove portions 18 and 22 is a refraction angle portion 28, the inside of the air groove 16 is removed when the sheet lid 40 is peeled off. The liquid that flows backward can be de-energized by colliding with the side wall surface of the refraction angle portion 28, and the liquid can be prevented from flying out from the air groove 16.
○ Since the circumferential groove portion 20 is formed in an arc shape, the frictional resistance between the liquid and the outer surface of the circumferential groove portion 20 is increased by the centrifugal force applied to the liquid flowing back through the circumferential groove portion 20, and the air groove 16 Therefore, it is possible to make it difficult for the backflow liquid to jump out.
The air groove 16 has the same depth over the entire length from the first end 24 to the second end 26, and the entire length excluding the refraction angle portion 28 is formed to have the same width. Since 28 has a width equal to or larger than the remaining groove portion, air easily passes through the air groove 16, and intake and exhaust through the air groove can be performed quickly.

第２の手段に係る発明によれば、エア溝16を浅溝状に形成したから、流路抵抗を大とすることで液体の飛出し防止を更に確実にすることができる。 According to the invention relating to the second means, since the air groove 16 is formed in a shallow groove shape, it is possible to further ensure the prevention of the liquid splash by increasing the flow path resistance.

第３の手段に係る発明によれば、周方向溝部20の長さを少なくとも鍔部８全周の半分としたから、流路抵抗を大とすることで液体の飛出し防止を更に確実にすることができる。 According to the invention relating to the third means, since the length of the circumferential groove portion 20 is at least half of the entire circumference of the flange portion 8, it is possible to further prevent the liquid from being prevented by increasing the flow path resistance. be able to.

第４の手段に係る発明によれば、上記エア溝16は、上記鍔部８の後部から左右両側部に亘って左右対称に形成した一対の溝としたから、一本の溝を設けた場合に比べて更にエア溝16を介した吸気及び排気を速やかに行うことができる。 According to the fourth aspect of the invention, since the air groove 16 is a pair of grooves formed symmetrically from the rear part of the flange part 8 to the left and right side parts, a single groove is provided. In comparison with the above, intake and exhaust through the air groove 16 can be performed quickly.

図１から図６は、本発明の第１実施形態に係る蓋付き容器を示しており、この容器は、容器体２とシート蓋40とで構成されている。 1 to 6 show a container with a lid according to a first embodiment of the present invention, and this container is composed of a container body 2 and a sheet lid 40.

容器体２は、底壁４周縁から略円筒形の周壁６を起立しており、この周壁の上端からは巾広の鍔部８を外方へ突出している。この鍔部８は後部を後側へ張り出させ、この張出し壁部10を左右に横断して弱化線12を設けている。 The container body 2 has a substantially cylindrical peripheral wall 6 erected from the periphery of the bottom wall 4, and a wide flange 8 protrudes outward from the upper end of the peripheral wall. The flange portion 8 has a rear portion protruding rearward, and a weakening line 12 is provided across the protruding wall portion 10 from side to side.

この鍔部８の上面には、その鍔部の後部から前部にかけて略半円形のエア溝16を形成する。このエア溝16は、第1径方向溝部18と周方向溝部20と第２径方向溝部22とで形成している。このエア溝16は、長さ方向ほぼ全体に亘って同一巾かつ同一深さに形成しており、また、図１乃至図３に示す如くその全長に亘って深さに比べて巾広の浅溝に形成している。 A substantially semicircular air groove 16 is formed on the upper surface of the flange 8 from the rear to the front of the flange. The air groove 16 is formed by a first radial groove portion 18, a circumferential groove portion 20, and a second radial groove portion 22. The air grooves 16 are formed to have the same width and the same depth over almost the entire length direction, and as shown in FIG. 1 to FIG. It is formed in the groove.

第１径方向溝部18は、上記張出し壁部10に位置する第1端24から弱化線12と交差して前方へ直線的に延びている。 The first radial groove 18 extends linearly forward from the first end 24 located in the overhanging wall 10 across the weakening line 12.

周方向溝部20は、第１径方向溝部18の先部（前部）から、周方向左右両側の一方（図示例では左方）へ円弧状に延びて鍔部８の前部へ至り、容器体２内へ第２端26を開口している。図示の周方向溝部20は、鍔部８の巾方向中間部分に凹設されており、この周方向溝部を除く鍔部外周部分及び内周部分と略同じ巾に形成している。 The circumferential groove 20 extends in a circular arc shape from the tip (front) of the first radial groove 18 to one of the left and right sides of the circumferential direction (left in the illustrated example) and reaches the front of the flange 8, A second end 26 is opened into the body 2. The illustrated circumferential groove portion 20 is recessed in the intermediate portion in the width direction of the flange portion 8, and is formed to have substantially the same width as the outer peripheral portion and inner peripheral portion of the flange portion excluding the circumferential groove portion.

第２径方向溝部22は、周方向溝部20の先部から後方へ直線上に延びてエア溝の第２端26を容器体内方へ開口している。 The second radial groove portion 22 linearly extends backward from the front portion of the circumferential groove portion 20 to open the second end 26 of the air groove toward the inside of the container.

これら第1、第２径方向溝部18,20と周方向溝部20とは、それぞれ平坦な底面と上下に短い垂直側面とで形成されている。 The first and second radial groove portions 18 and 20 and the circumferential groove portion 20 are each formed with a flat bottom surface and vertically short vertical side surfaces.

第１、第２径方向溝部18,22と周方向溝部20との間には図５乃至図６に示す如く屈折角部28を形成する。この屈折角部28は、内角30を含む内側面と外隅32の外側面と底面とで形成しており、図示例では上面から見てほぼ４角形状とし、内角30と外隅32との間の巾ｄ₁を屈折角部の入口及び出口での巾ｄ₂、ｄ₃よりも大としている。もっとも屈折角部28の外側面を内角30から一定距離として上方から見て円弧状に形成しても良い。又、屈折角部28の底面は、第1径方向溝部18又は第２径方向溝部22と周方向溝部20との各底面と同じ高さで連続している。 A refraction angle portion 28 is formed between the first and second radial groove portions 18 and 22 and the circumferential groove portion 20 as shown in FIGS. The refraction angle portion 28 is formed by an inner surface including the inner angle 30, an outer surface and a bottom surface of the outer corner 32, and has a substantially quadrangular shape as viewed from the upper surface in the illustrated example. The width d ₁ between them is larger than the widths d ₂ and d ₃ at the entrance and exit of the refraction angle portion. Of course, the outer surface of the refraction angle portion 28 may be formed in an arc shape when viewed from above with a constant distance from the inner angle 30. Further, the bottom surface of the refraction angle portion 28 is continuous at the same height as the bottom surfaces of the first radial groove portion 18 or the second radial groove portion 22 and the circumferential groove portion 20.

上記エア溝16の構造のうち、第１径方向溝部及び第２径方向溝部の位置と周方向溝部の長さとは適宜変更することができる。 In the structure of the air groove 16, the positions of the first radial groove portion and the second radial groove portion and the length of the circumferential groove portion can be appropriately changed.

シート蓋40は、図３に示す如く張出し壁部を含む鍔部８の輪郭に対応した形状に形成しており、エア溝16を除く鍔部８上面部分へ剥離自在に貼着させている。そしてエア溝の底面と内外側面とシート蓋40の対応下面部分とで空気流路34を形成している。この空気流路34は図２に示す如くエア溝16の底面とシート蓋40との下面とが僅かな距離を挟んで向かい合って流路方向から見て横長長方形状に形成されたものであり、空気は容易に通るが、内容液に対する抵抗は大となるように設けている。 As shown in FIG. 3, the sheet lid 40 is formed in a shape corresponding to the contour of the flange portion 8 including the overhanging wall portion, and is detachably attached to the upper surface portion of the flange portion 8 excluding the air groove 16. An air flow path 34 is formed by the bottom surface of the air groove, the inner and outer surfaces, and the corresponding lower surface portion of the seat lid 40. 2, the air flow path 34 is formed in a horizontally long rectangular shape as viewed from the flow path direction with the bottom surface of the air groove 16 and the lower surface of the seat lid 40 facing each other with a slight distance therebetween. Although air easily passes, it is provided so that the resistance against the content liquid is large.

上記構成において、図１の状態から張出し頂壁10を摘んで引き上げると、弱化線12が破断して、エア溝16の第1端24側が破断する。このとき容器体２内が負圧化していれば、図５及び図６に黒矢印で示す如く外気が第1端24側から空気流路34を介して容器体２内へ入る。上記空気流路34は横長長方形状で流路抵抗の大きい形状をしているが、このとき空気は液体に比べて密度が低いので、第１、第２径方向溝部18,22と周方向溝部20と屈折角部28とを容易に通り抜けて、容器体２内へ流入することができる。ところが容器体２内の負圧が大き過ぎると、容器体２内に空気が入り過ぎて逆に容器体２内が急激に高圧化する可能性がある。この急速な圧力変化の反動によりまず容器体２内上部に存する高圧空気が図５、図６の黒矢印と逆向きの方向に排出され、更に容器体の高圧液体が同図に白矢印で示す如く空気流路34を介して第２端26から第1端24側へ逆流することになる。しかし上記の如く空気流路34の形状を流路抵抗の大きい偏平な形状としているとともに、第２径方向溝部22から周方向溝部20へ至る間に巾広で底浅の屈折角部28を設けているので、空気に比べて比重の大きい内容液は図６に示す如く屈折角部28の外側面と強く衝突して減勢されるため、大抵の場合には、この前方側の屈折角部28を通過したところで停止してしまう。更に逆流液体の勢いが非常に強い場合でも、その勢いが強ければ強いほど、円弧形状に形成した周方向溝部20の外側面へ遠心力で圧接されるために急速に失速することになる。そして仮に逆流液体が鍔部８の後部側へ辿り付いても図５に示す如くそこで再び後方側の屈折角部28の外側面に衝突するために停止して、外部へ飛び出すことがない。 In the above configuration, when the overhanging top wall 10 is picked and pulled from the state of FIG. 1, the weakening line 12 is broken and the first end 24 side of the air groove 16 is broken. At this time, if the pressure inside the container body 2 is negative, outside air enters the container body 2 from the first end 24 side via the air flow path 34 as shown by black arrows in FIGS. 5 and 6. The air channel 34 has a horizontally long rectangular shape and a large channel resistance. At this time, since the air has a lower density than the liquid, the first and second radial grooves 18 and 22 and the circumferential groove 20 and the refraction angle portion 28 can be easily passed through and into the container body 2. However, if the negative pressure in the container body 2 is too large, air may enter the container body 2 too much, and conversely, the inside of the container body 2 may be rapidly increased in pressure. By the reaction of this rapid pressure change, the high-pressure air existing in the upper part of the container body 2 is first discharged in the direction opposite to the black arrow in FIGS. 5 and 6, and the high-pressure liquid in the container body is indicated by the white arrow in the figure. Thus, the air flows back from the second end 26 to the first end 24 via the air flow path 34. However, as described above, the air channel 34 has a flat shape with a large channel resistance, and a wide and shallow refraction angle portion 28 is provided between the second radial groove portion 22 and the circumferential groove portion 20. Therefore, the content liquid having a larger specific gravity than air is strongly defeated by colliding with the outer surface of the refraction angle portion 28 as shown in FIG. 6, and in most cases, this front refraction angle portion. Stops after passing 28. Further, even when the momentum of the backflow liquid is very strong, the stronger the momentum, the quicker the stall occurs because the outer surface of the circumferential groove 20 formed in an arc shape is pressed by centrifugal force. Even if the backflow liquid reaches the rear side of the flange 8 as shown in FIG. 5, it stops again because it collides with the outer surface of the rear side refraction angle portion 28 and does not jump out.

以下、本発明の他の実施形態乃至実施例について説明する。これらの実施形態等において、第1実施形態と同じ構成については同一符号を付することで説明を省略する。 Hereinafter, other embodiments or examples of the present invention will be described. In these embodiments and the like, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

図７は、本発明の第２の実施形態である。この実施形態は、第1実施形態における鍔部８半周分の周方向溝部20に代えて、鍔部８の３／４周分の周方向溝部20を設けたものである。 FIG. 7 shows a second embodiment of the present invention. In this embodiment, instead of the circumferential groove portion 20 corresponding to half of the flange portion 8 in the first embodiment, a circumferential groove portion 20 corresponding to 3/4 of the flange portion 8 is provided.

図８は、本発明の第３の実施形態である。この実施形態では、上記鍔部８の上面左右両側に左右対称な一対のエア溝16,16を設けている。 FIG. 8 shows a third embodiment of the present invention. In this embodiment, a pair of symmetrical air grooves 16 and 16 are provided on the left and right sides of the upper surface of the flange portion 8.

図９乃至図11は本発明の実施形態を示している。この実施例は鍔部８の後部に張出し頂壁を設けずに、第1径方向溝部18を短くして、この第1径方向溝部と後方側の屈折角部28とを、他の部分と同巾の鍔部８の後部内に設けたものである。 9 to 11 show an embodiment of the present invention. In this embodiment, the first radial groove 18 is shortened without providing a projecting top wall at the rear part of the flange part 8, and the first radial groove part and the rear-side refraction angle part 28 are replaced with other parts. It is provided in the rear part of the flange part 8 of the same width.

この実施例では、周方向溝部20は鍔部８の内周側部分に形成されており、この構成によれば第1実施形態の構成に比べてエア溝16の流路長をやや短くすることができる。 In this embodiment, the circumferential groove portion 20 is formed in the inner peripheral side portion of the flange portion 8, and according to this configuration, the flow path length of the air groove 16 is slightly shortened compared to the configuration of the first embodiment. Can do.

本発明の第1の実施形態の縦断面図である。1 is a longitudinal sectional view of a first embodiment of the present invention. 図１の容器の一部拡大縦断面図である。It is a partially expanded longitudinal cross-sectional view of the container of FIG. 図１容器の分解斜視図である。1 is an exploded perspective view of the container. 図１容器のシート蓋剥離状態での平面図である。FIG. 1 is a plan view of the container with the sheet lid peeled off. 図４の要部拡大図である。It is a principal part enlarged view of FIG. 図４の他の要部拡大図である。It is the other principal part enlarged view of FIG. 本発明の第２の実施形態の容器のシート蓋剥離状態での平面図である。It is a top view in the sheet lid peeling state of the container of the 2nd Embodiment of this invention. 本発明の第３の実施形態の容器のシート蓋剥離状態での平面図である。It is a top view in the sheet lid peeling state of the container of the 3rd Embodiment of this invention. 本発明の実施例の容器の縦断面図である。It is a longitudinal cross-sectional view of the container of the Example of this invention. 図９の容器のシート蓋剥離状態での平面図である。FIG. 10 is a plan view of the container of FIG. 9 with the sheet lid peeled off. 図９の容器のシート蓋剥離状態での斜視図である。FIG. 10 is a perspective view of the container of FIG. 9 with the sheet lid peeled off.

Explanation of symbols

２…容器体４…底壁６…周壁８…鍔部 10…張出し壁部 12…弱化線
16…エア溝 18…第１径方向溝部 20…周方向溝部 22…第２径方向溝部
24…第1端 26…第２端 28…屈折角部 30…内角 32…外隅 34…空気流路
40…シート蓋

2 ... container body 4 ... bottom wall 6 ... peripheral wall 8 ... collar part 10 ... overhang wall part 12 ... weakening line
16 ... Air groove 18 ... First radial groove 20 ... Circumferential groove 22 ... Second radial groove
24 ... First end 26 ... Second end 28 ... Refraction corner 30 ... Inner corner 32 ... Outer corner 34 ... Air flow path
40 ... Seat cover

Claims

The flange 8 is attached to the upper end of the cylindrical wall closed at the lower end, and the container body 2 in which the air groove 16 is opened from the portion near the outer periphery of the flange to the inner edge of the peripheral wall and the upper surface of the flange 8 are detachably attached. The air groove 16 includes a seat lid 40, and the air groove 16 has a gap between the front end of the first radial groove portion 18 inward from the first end 24 near the outer periphery of the flange portion 8 and the inner and outer edges of the flange portion 8. The second radial groove portion 22 protrudes inwardly through the circumferential groove portion 20 extending in an arc shape and the second end 26 is formed at the upper end of the inner surface of the container body peripheral wall 6. 2. As a depressing part for the backflow liquid from the inside, each joint part between the first and second radial groove parts 18 and 22 and the circumferential groove part 20 is a refraction angle part 28, and air excluding this refraction angle part The entire length of the groove 16 is the same width, the width of the refracting angle portion 28 is greater than or equal to the remaining air groove portion, and the depth of the air groove 16 is set to the depth of the air groove. A container with a lid, characterized by being identical over the entire length.

The container with a lid according to claim 1, wherein the air groove (16) is formed in a shallow groove shape which is wide with respect to the depth.

The container with a lid according to claim 1 or 2, wherein the circumferential groove portion (20) has a length that is at least about half of the entire circumferential length of the flange portion (8).

4. The air groove 16 according to claim 1, wherein a pair of air grooves formed symmetrically from the rear outer peripheral portion of the flange portion 8 to both left and right side portions are provided as the air groove 16. A container with a lid according to 1.