JP5022179B2

JP5022179B2 - Container lid

Info

Publication number: JP5022179B2
Application number: JP2007281411A
Authority: JP
Inventors: 光雄熊田; 仁臣松谷; 祐司冨高
Original assignee: Nippon Closures Co Ltd
Current assignee: Nippon Closures Co Ltd
Priority date: 2006-11-01
Filing date: 2007-10-30
Publication date: 2012-09-12
Anticipated expiration: 2027-10-30
Also published as: JP2008133053A

Description

本発明は、飲料、洗剤、薬剤などの液体を収容する容器の口頸部に設けられ、開閉時に手触り感の良い容器蓋に関する。 The present invention relates to a container lid that is provided on the mouth and neck of a container that contains liquids such as beverages, detergents, and medicines and that has a good touch when opened and closed.

コーヒーや清涼飲料水などの容器の容器蓋には、有底円筒体形状の周壁部に相当するいわゆるスカート壁に、上下方向に延びる線条の突部（縦リブ、業界内ではナール、ローレットなどと呼ばれる）が形成されている。この突部は、容器蓋を開閉するときに、指が滑らないようにするために設けられている。
通常、容器蓋には突部が同じ形状で同じ高さのものが形成されているが、さらなる容器蓋の開閉性を向上させるために、下記の特許文献１の技術が開示されている。特許文献１の技術では、スカート壁の上下方向へ延びる線条の突部について、容器蓋の半径方向外側に向けて背の高い突部（以下、大突部という）と背の低い突部（以下小突部という）の２種の突部を形成し、これらの大突部と小突部とを容器蓋のスカート壁の全周部の周方向へ向けて互い違いに並べている。こうして、容器蓋の開閉の際に、指の引っ掛かりを良くし、容器蓋に回転トルクを与えて開閉性を向上させている。
特開２００１−３５４２４７号公報 On the container lid of containers such as coffee and soft drinks, a so-called skirt wall corresponding to the peripheral wall of the bottomed cylindrical shape, and a protruding portion of a line extending vertically (vertical rib, knurl, knurl, etc. in the industry) Called). This protrusion is provided to prevent the finger from slipping when the container lid is opened and closed.
Usually, the container lid is formed with the same shape and the same height, but in order to further improve the opening / closing performance of the container lid, the technique of Patent Document 1 below is disclosed. In the technique of Patent Document 1, with respect to the protrusions of the filaments extending in the vertical direction of the skirt wall, a tall protrusion (hereinafter referred to as a large protrusion) and a short protrusion (hereinafter referred to as a large protrusion) toward the radially outer side of the container lid ( (Hereinafter referred to as “small protrusions”), and the large protrusions and the small protrusions are alternately arranged in the circumferential direction of the entire peripheral part of the skirt wall of the container lid. Thus, when the container lid is opened and closed, finger catching is improved, and a rotational torque is applied to the container lid to improve the opening and closing performance.
JP 2001-354247 A

特許文献１のように、大突部と小突部を交互に並べると、大突部を従来の基準となる突部と同じ大きさに形成し、小突部の形状を小さくすると容器蓋の剛性（強度）が小さくなる傾向にあり、小突部の形状を従来の基準となる突部と同じ大きさに形成し、大突部の形状を大きくすると容器蓋の剛性は大きくなるが、材料費が嵩み製造コストが高くなる。
また、突部の形状において、開閉性の向上のため、大突部の領域と小突部の領域とを交互に組み合わせたり、さらには、突部を形成した部分と突部を形成しない部分の領域をスカート壁の周方向へ交互に並べた形状のものなどが考えられる。このような形状のものは、スカート壁の厚みが大突部の領域では厚肉になり小突部の領域若しくは突部が形成されていない領域では薄肉になるので、容器蓋の各部において肉厚が異なってしまう。このように、容器蓋に肉厚の厚い部分と薄い部分とがあると、成形時における冷却効率が各部で均一にならず、容器蓋の内周面に形成されている雌ネジのネジダレ等が発生することがある。 When the large protrusions and the small protrusions are alternately arranged as in Patent Document 1, the large protrusions are formed in the same size as the conventional reference protrusions, and if the shape of the small protrusions is reduced, the container lid The rigidity (strength) tends to be small, and the shape of the small protrusion is formed to the same size as that of the conventional reference protrusion. If the shape of the large protrusion is increased, the rigidity of the container lid increases. Expense increases and manufacturing costs increase.
In addition, in the shape of the protrusion, in order to improve the openability, the area of the large protrusion and the area of the small protrusion are combined alternately, or further, the portion where the protrusion is formed and the portion where the protrusion is not formed The thing of the shape which arranged the area | region alternately in the circumferential direction of the skirt wall etc. can be considered. In such a shape, the thickness of the skirt wall is thick in the region of the large protrusion and thin in the region of the small protrusion or the region where no protrusion is formed. Will be different. As described above, when the container lid has a thick part and a thin part, the cooling efficiency at the time of molding is not uniform in each part, and the female thread formed on the inner peripheral surface of the container lid or the like May occur.

本発明は、このような事情に鑑みてなされたものであって、容器の開閉性を向上させるとともに、スカート壁における厚肉部と薄肉部との部分があっても、重量を重くすることなく、全体の剛性のバランスを均一にすることのできる容器蓋を提供することを目的とする。 The present invention has been made in view of such circumstances, and improves the openability of the container, and does not increase the weight even if there are thick and thin portions on the skirt wall. An object of the present invention is to provide a container lid capable of making the balance of rigidity of the whole uniform.

本発明の容器蓋は、上記目的を達成するために、天面壁と該天面壁の周縁から垂下する筒状のスカート壁とを有し、該スカート壁は周方向に延在する破断可能な弱化ラインよりも上方の主部と前記弱化ラインよりも下方のタンパーエビデント裾部とに区画され、前記スカート壁の少なくとも前記主部の周壁部には、複数の肉厚の厚い厚肉部領域と複数の肉厚の薄い薄肉部領域とを前記主部の周壁部の周方向に亘って形成し、前記主部の周壁部内面の雌ネジ形成領域には容器の口頸部に係合する雌ネジを形成した容器蓋において、
前記主部には、肉厚の等しい周壁部が設けられ、前記厚肉部領域が、前記周壁部の外側に突出し前記主部の上下方向に延在する線条の複数の突部によって形成され、前記薄肉部領域が、前記周壁部の外側に突出し前記主部の上下方向に延在する線条の複数の突部から形成され、
更に、前記厚肉部領域は、前記周壁部の周方向に形成された前記突部のうち高さの大きな複数の大突部からなり、前記薄肉部領域は前記周壁部の周方向に形成された前記突部のうち前記大突部よりも高さの小さな複数の小突部から形成され、
前記薄肉部領域と前記厚肉部領域とが連続して交互に形成され、
前記雌ネジ形成領域にはネジ山である複数のネジ部からなる前記雌ネジと、ネジ山が欠落した複数の欠落部とを形成し、少なくとも前記薄肉部領域の前記周壁部内周面には前記ネジ部が配設され、少なくとも前記欠落部が位置する前記周壁部の外面には前記厚肉部領域が配設され、
前記ネジ部は隣り合う前記厚肉部領域の両端部から前記薄肉部領域に亘って周壁部の内周面に形成され、該厚肉部領域の両端部に対応する内周面に該ネジ部の両端部に形成された傾斜部を位置させた。
また、前記小突部領域内において、前記小突部の突出高さは周方向外側から中間側に向かって漸次減少することができる。 In order to achieve the above object, the container lid of the present invention has a top wall and a cylindrical skirt wall that hangs down from the periphery of the top wall, and the skirt wall extends in the circumferential direction and is fragile and breakable. A main portion above the line and a tamper evidence skirt below the weakening line, and at least the peripheral wall portion of the main portion of the skirt wall includes a plurality of thick and thick portions. forms form a plurality of thin walled region of the wall thickness over the circumferential direction of the peripheral wall of the main portion to engage the neck of the container into the female thread forming region of the peripheral wall inner surface of the main portion In the container lid formed with the female thread,
The main portion is provided with a peripheral wall portion having the same thickness, and the thick portion region is formed by a plurality of protrusions of a line protruding outside the peripheral wall portion and extending in the vertical direction of the main portion. The thin wall region is formed from a plurality of protrusions of a line projecting outside the peripheral wall portion and extending in the vertical direction of the main portion,
Furthermore, the thick wall region is composed of a plurality of large protrusions having a large height among the protrusions formed in the circumferential direction of the peripheral wall portion, and the thin wall region is formed in the circumferential direction of the peripheral wall portion. Among the protrusions, a plurality of small protrusions having a smaller height than the large protrusions are formed.
The thin wall region and the thick wall region are formed alternately and continuously,
The female screw forming region is formed with the female screw composed of a plurality of screw portions that are screw threads and a plurality of missing portions where the screw thread is missing, and at least on the inner peripheral surface of the peripheral wall portion of the thin-walled region. A threaded portion is disposed, and at least the thick wall region is disposed on the outer surface of the peripheral wall where the missing portion is located ,
The screw portion is formed on the inner peripheral surface of the peripheral wall portion from both ends of the adjacent thick portion region to the thin portion region, and the screw portion is formed on the inner peripheral surface corresponding to both end portions of the thick portion region. The inclined part formed in the both ends of was positioned.
In the small protrusion region, the protrusion height of the small protrusion can gradually decrease from the outer circumferential side toward the intermediate side.

本発明の容器蓋によれば、容器蓋の周壁部内周に形成した雌ネジ形成領域が、ネジ山を有するネジ部と、ネジ山が欠落した複数の欠落部とによって形成され、少なくとも薄肉部領域の前記周壁部内面には前記ネジ部が配設され、少なくとも前記欠落部が形成された前記周壁部の外面には前記厚肉部領域が配設されるようにしたので、厚肉部領域と薄肉部領域のある容器蓋の厚みバランスの均一化を図ることによって、容器蓋の成形時における冷却効率が向上し、離型抵抗のバランスをとることが可能となり、ネジダレ等を抑制することができる。
上記容器蓋によれば、容器蓋の主部には、肉厚の等しい周壁部が設けられ、前記厚肉部領域が、前記周壁部の外側に突出し前記主部の上下方向に延在する線条の複数の突部によって形成されているので、厚肉部領域の突部に指先が引っ掛かることによって、容器蓋に指先が滑ることなく容易に開けることができる。
また、上記容器蓋の前記薄肉部領域には、前記周壁部の外側に突出し前記主部の上下方向に延在する線条の複数の突部が形成され、前記厚肉部領域は、前記突部のうち高さの大きな複数の大突部を前記周壁部の周方向に設け、前記薄肉部領域は前記突部のうち前記大突部よりも高さの小さな複数の小突部を前記周壁部の周方向に設けるようにしたので、全周に複数の突部が形成された容器蓋において、剛性の大きな大突部で形成される厚肉部領域は、ネジ山の欠落部を配置し、剛性の小さな小突部で形成される薄肉部領域は、ネジ部を形成することによって、前記各領域の剛性の均一化を図ることができる。
さらに、前記小突部領域内において、前記小突部の突出高さは周方向外側から中間側に向かって漸次減少するように形成したので、容器蓋を開閉するときの触感性がより向上するようになった。 According to the container lid of the present invention, the female screw forming region formed on the inner periphery of the peripheral wall portion of the container lid is formed by a screw portion having a screw thread and a plurality of missing portions in which the screw thread is missing, and at least a thin portion region. The screw portion is disposed on the inner surface of the peripheral wall portion, and the thick portion region is disposed on the outer surface of the peripheral wall portion where at least the missing portion is formed. By making the thickness balance of the container lid with the thin-walled region uniform, the cooling efficiency at the time of molding the container lid can be improved, the balance of the mold release resistance can be balanced, and screw sag can be suppressed. .
According to the container lid, the main portion of the container lid is provided with the peripheral wall portion having the same thickness, and the thick portion region protrudes outside the peripheral wall portion and extends in the vertical direction of the main portion. Since it is formed by the plurality of protrusions of the strip, the fingertip can be easily opened without slipping on the container lid when the fingertip is hooked on the protrusion in the thick portion region.
The thin-walled portion region of the container lid is formed with a plurality of protrusions of a line projecting outward of the peripheral wall portion and extending in the vertical direction of the main portion, and the thick-walled portion region includes the protruding portion. A plurality of large projections having a large height are provided in the circumferential direction of the peripheral wall portion, and the thin-wall portion region includes a plurality of small projections having a height lower than the large projection among the projections. In the container lid in which a plurality of protrusions are formed on the entire circumference, the thick-walled region formed by the large rigid protrusion has a thread missing portion disposed therein. The thin-walled region formed by small protrusions with small rigidity can be made uniform in rigidity by forming a screw portion.
Furthermore, since the protrusion height of the small protrusion gradually decreases from the outer circumferential side toward the intermediate side in the small protrusion region, the tactile sensation when opening and closing the container lid is further improved. It became so.

以下、本発明の第１の実施形態の容器蓋について、図面を参照しながら説明する。
図１は、本発明に係る容器蓋１の斜視図であり、図２は中心線より右側が容器蓋１の正面図、左側が容器蓋１の断面図であり、図３は、容器蓋１の水平方向断面図（図４のＸ−Ｘ線方向断面）であり、図４は図１の容器蓋を垂直方向へ切断した断面図である。
この容器蓋１は、例えばポリエチレン、ポリプロピレンなどの合成樹脂などから形成されており、円板形状の天面壁５とこの天面壁５の周縁から垂下する略円筒形状のスカート壁６とを有する。容器蓋１の円形天面壁５は、全体が実質上水平に延在し、スカート壁６の下部には周方向に延在する弱化ライン７が形成されている。スカート壁６には、その弱化ライン７よりも上方に主部８を設け、それよりも下方にタンパーエビデント裾部１０を設けている。 Hereinafter, a container lid according to a first embodiment of the present invention will be described with reference to the drawings.
1 is a perspective view of a container lid 1 according to the present invention, FIG. 2 is a front view of the container lid 1 on the right side of the center line, a cross-sectional view of the container lid 1 on the left side, and FIG. FIG. 4 is a cross-sectional view of the container lid of FIG. 1 cut in the vertical direction.
The container lid 1 is made of, for example, a synthetic resin such as polyethylene or polypropylene, and has a disk-shaped top surface wall 5 and a substantially cylindrical skirt wall 6 that hangs down from the periphery of the top surface wall 5. The circular top wall 5 of the container lid 1 extends substantially horizontally, and a weakening line 7 extending in the circumferential direction is formed at the bottom of the skirt wall 6. The skirt wall 6 is provided with a main portion 8 above the weakening line 7 and with a tamper evidence skirt 10 below the main portion 8.

図４に示すように、周方向弱化ライン７は、周方向に間隔をおいて形成されたスリット１２とこれらのスリット１２間に存在する橋絡部１４とから構成されている。橋絡部１４は、主部８と裾部１０を上下方向に連結し、橋絡部１４の周方向長さはスリット１２の周方向長さと比べて充分に短く形成され、周方向弱化ライン７の破断を容易にしている。
スカート壁６の主部８は、肉厚の等しい筒状の周壁部１６と周壁部１６から半径方向外側に突出する複数の突部１７が形成されている。突部１７はスカート壁６の上下方向に直線状に延びる線条（リブ状）形状であって、主部８の全周に亘って形成されている。 As shown in FIG. 4, the circumferential weakening line 7 is composed of slits 12 formed at intervals in the circumferential direction and bridging portions 14 existing between these slits 12. The bridging portion 14 connects the main portion 8 and the skirt portion 10 in the vertical direction, and the circumferential length of the bridging portion 14 is sufficiently shorter than the circumferential length of the slit 12, and the circumferential weakening line 7 It is easy to break.
The main portion 8 of the skirt wall 6 is formed with a cylindrical peripheral wall portion 16 having the same thickness and a plurality of protrusions 17 protruding radially outward from the peripheral wall portion 16. The protrusion 17 has a linear shape (rib shape) extending linearly in the vertical direction of the skirt wall 6 and is formed over the entire circumference of the main portion 8.

図３の容器蓋１を水平方向に切断した断面図に示すように、突部１７は高さの大きな大突部１８ａとこの大突部１８ａよりも高さの低い小突部１９ａ〜１９ｃが形成されている。大突部１８ａは、断面形状がほぼ半円形状であり、この同一形状の大突部１８ａが同ピッチで、本実施形態では５個が連続して配設されている。以下、大突部１８ａが５個連続して並べられた領域を、厚肉部領域１８という。即ち、厚肉部領域１８とはスカート壁６の主部８のうち、雌ネジ２１ａを除いた平均肉厚が厚い領域をいう。この厚肉部領域１８は、同一形状に構成されている厚肉部領域１８が複数設けられ、主部８の周方向に等間隔に配設されている。厚肉部領域１８の周方向角度θは１０度〜４５度の範囲が好ましい。 As shown in the cross-sectional view of the container lid 1 of FIG. 3 cut in the horizontal direction, the protrusion 17 has a large protrusion 18a having a large height and small protrusions 19a to 19c having a height lower than the large protrusion 18a. Is formed. The large protrusions 18a have a substantially semicircular cross section, and the large protrusions 18a having the same shape have the same pitch. In the present embodiment, five large protrusions 18a are continuously arranged. Hereinafter, a region in which five large protrusions 18 a are continuously arranged is referred to as a thick portion region 18. That is, the thick region 18 Chi sac main portion 8 of the skirt wall 6, average thickness, excluding the female screw 21a refers to a thick region. The thick part region 18 is provided with a plurality of thick part regions 18 having the same shape, and is arranged at equal intervals in the circumferential direction of the main part 8. The circumferential direction angle θ of the thick portion region 18 is preferably in the range of 10 degrees to 45 degrees.

主部８の各厚肉部領域１８の間には、薄肉部領域１９が形成されている。薄肉部領域１９とはスカート壁の主部８のうち、雌ネジ２１ａを除いた平均肉厚が薄い領域をいう。この薄肉部領域１９は、上述した大突部１８ａよりも高さの小さい小突部１９ａ〜１９ｃが周壁部１６から突出して形成され、小突部１９ａ〜１９ｃは薄肉部領域１９内にて、最外側に位置する２個の外側小突部１９ａの高さが、大突部１８ａの高さよりも低く、外側小突部１９ａの内側に位置する２個の内側小突部１９ｂの高さが、外側小突部１９ａよりも低く、内側小突部１９ｂの内方側に位置し、薄肉部領域１９の中央位置にある１つの中央小突部１９ｃがさらに内側小突部１９ｂの高さよりも低く形成されている。これらの外側小突部１９ａ、内側小突部１９ｂ及び中央小突部１９ｃの周方向ピッチは、大突部１８ａの周方向ピッチに等しく形成されている。よって、厚肉部領域１８の周方向角度と薄肉部領域１９の周方向角度は、本実施形態では一致させている。なお、厚肉部領域１８及び薄肉部領域１９の周方向ピッチは、必ずしも一致させる必要はなく、適宜変更することも可能である。 Between each thick part area | region 18 of the main part 8, the thin part area | region 19 is formed. The thin region 19 Chi sac main portion 8 of the skirt wall, the average thickness, excluding the female screw 21a refers to a thin region. The thin-walled portion region 19 is formed by projecting small protrusions 19a to 19c having a height smaller than the large protrusion 18a described above from the peripheral wall portion 16, and the small protrusions 19a to 19c are formed in the thin-walled portion region 19, The heights of the two outer small protrusions 19a positioned on the outermost side are lower than the height of the large protrusion 18a, and the heights of the two inner small protrusions 19b positioned on the inner side of the outer small protrusion 19a. One central small protrusion 19c located lower than the outer small protrusion 19a, on the inner side of the inner small protrusion 19b, and located at the center of the thin-walled region 19 is further higher than the height of the inner small protrusion 19b. It is formed low. The circumferential pitches of the outer small projections 19a, the inner small projections 19b, and the central small projections 19c are formed to be equal to the circumferential pitch of the large projections 18a. Therefore, the circumferential direction angle of the thick part area | region 18 and the circumferential direction angle of the thin part area | region 19 are made to correspond in this embodiment. It should be noted that the circumferential pitches of the thick portion region 18 and the thin portion region 19 are not necessarily matched, and can be changed as appropriate.

そして、厚肉部領域１８では、大突部１８ａの周壁部１６外面からの突出高さが、各々同一であり、薄肉部領域１９では、薄肉部領域１９の外側から中間位置に向かって、小突部１９ａ、１９ｂ、１９ｃの順に配置され、小突部１９ａ、１９ｂ、１９ｃの順に漸次、周壁部１６外面からの突出高さが低くなるように形成されている。このように、主部８は厚肉部領域１８の部分の平均肉厚が、大突部１８ａの存在によって厚肉に形成され、薄肉部領域１９の部分の平均肉厚が、大突部１８ａよりも低い小突部１９ａによって薄肉に形成されている。 And in the thick part area | region 18, the protrusion height from the surrounding wall part 16 outer surface of the large protrusion 18a is respectively the same, and in the thin part area | region 19, it is small toward the intermediate position from the outer side of the thin part area | region 19. The protrusions 19a, 19b, and 19c are arranged in this order, and the protrusions 19a, 19b, and 19c are formed so that the protrusion height from the outer surface of the peripheral wall 16 gradually decreases in the order of the small protrusions 19a, 19b, and 19c. As described above, the main portion 8 is formed so that the average thickness of the thick portion region 18 is thick due to the presence of the large protrusion 18a, and the average thickness of the thin portion region 19 is large. It is formed thin by the lower small protrusion 19a.

図２に示すように、容器２の口頸部３の外周部に雄ネジ４が形成され、容器蓋１のスカート壁６の主部８側内周面には、雄ネジ４に螺着する雌ネジ２１ａを形成している。図４に示すように、容器蓋１に形成されている雌ネジ形成領域２１のネジ山を有するネジ部（雌ネジ）２１ａは主部８の内周壁を緩やかに螺旋状に延びるように形成され、雌ネジ形成領域２１はネジ部２１ａとネジ山のない欠落部２１ｂとによって形成されている。図３に示すように、ネジ部２１ａのある部分は、薄肉部領域１９のある主部８の内周面の位置に対応させて配置している。さらに詳細に説明すると、ネジ部２１ａは厚肉部領域１８の両端部にある大突部１８ａの部分から薄肉部領域１９に亘って形成され、大突部１８ａの両端にある突部の部分にネジ部２１ａの両端部に位置する傾斜部２１ｃが形成されている。ネジ山のない欠落部２１ｂの部分は、厚肉部領域１８の内側３個の大突部１８ａに対応する周壁部１６の内周面に位置させている。 As shown in FIG. 2, a male screw 4 is formed on the outer peripheral portion of the mouth / neck portion 3 of the container 2, and is screwed to the male screw 4 on the inner peripheral surface of the main body 8 side of the skirt wall 6 of the container lid 1. A female screw 21a is formed. As shown in FIG. 4, a screw portion (female screw) 21 a having a thread of a female screw forming region 21 formed on the container lid 1 is formed so as to extend gently and spirally on the inner peripheral wall of the main portion 8. The female screw forming region 21 is formed by a screw portion 21a and a missing portion 21b having no thread. As shown in FIG. 3, the portion where the screw portion 21 a is located is arranged corresponding to the position of the inner peripheral surface of the main portion 8 where the thin portion region 19 is present. More specifically, the screw portion 21a is formed from the large protrusion 18a at both ends of the thick portion region 18 to the thin portion region 19, and is formed at the protrusions at both ends of the large protrusion 18a. Inclined portions 21c located at both ends of the screw portion 21a are formed. The part of the missing part 21 b without a thread is located on the inner peripheral surface of the peripheral wall part 16 corresponding to the three large protrusions 18 a inside the thick part region 18.

図２に示すように、天面壁５の内面側かつ半径方向外側には、天面壁５から下側に突出する環状シール２３が形成され、天面壁５のさらに半径方向外側には、同様に天面壁５から下側に突出する環状リップ２４が形成されている。環状シール２３は、外周面が容器２の口頸部３の内周面３ａに当接することによってシール性を保持する。
環状リップ２４は、内周面側に逆階段形状の段部２４ａを形成し、段部２４ａは、口頸部３の肩部３ｂに対応する位置に形成され、環状シール２３と共にシール性を向上する役割を果たしている。 As shown in FIG. 2, an annular seal 23 protruding downward from the top surface wall 5 is formed on the inner surface side and the radially outer side of the top surface wall 5, and the top surface wall 5 is similarly formed on the further outer side in the radial direction. An annular lip 24 protruding downward from the face wall 5 is formed. The annular seal 23 retains its sealing performance when the outer peripheral surface comes into contact with the inner peripheral surface 3 a of the mouth and neck portion 3 of the container 2.
The annular lip 24 forms an inverted stepped step portion 24 a on the inner peripheral surface side, and the step portion 24 a is formed at a position corresponding to the shoulder portion 3 b of the mouth and neck portion 3, and improves the sealing performance together with the annular seal 23. Playing a role.

図５は、容器蓋１の底面図を示し、天面壁５の内面には環状シール２３の内周面から半径方向内側に向かって、リブ２６を形成している。リブ２６は等角度間隔（１２０度）に、３個所設けられている。例えば、容器２内の気圧が大きくなったような状態では、容器蓋１の天面壁５の中心部が容器２の上方に膨張するようなことがある。このような場合では、リブ２６の基端側が環状シール２３に連結されているので、リブ２６が天面壁５の動きに連動して動く際に、リブ２６が環状シール２３を天面壁５の動きと連動させて、容器２内のベントを行う役割を果たす。 FIG. 5 shows a bottom view of the container lid 1, and ribs 26 are formed on the inner surface of the top wall 5 from the inner peripheral surface of the annular seal 23 toward the inner side in the radial direction. Three ribs 26 are provided at equiangular intervals (120 degrees). For example, when the atmospheric pressure in the container 2 is increased, the central portion of the top wall 5 of the container lid 1 may expand above the container 2. In such a case, since the base end side of the rib 26 is connected to the annular seal 23, when the rib 26 moves in conjunction with the movement of the top wall 5, the rib 26 moves the annular seal 23 on the top wall 5. In conjunction with this, it plays a role of venting the container 2.

容器蓋１の裾部１０の内周面下側には、矩形形状で板状のフラップ３０が連結され、フラップ３０は、先端側が容器蓋１の内周面側へ斜め上方に向けて形成されている。フラップ３０は、容器蓋１との連結部である基端側がヒンジ部の役割を果たし、樹脂の弾性効果によって、フラップ３０が可撓性を有している。図４及び図５に示すように、フラップ３０は裾部１０の内周面に設けられ、裾部１０の周方向へ間隔を開けて形成されている。図２に示すように、容器２の口頸部３における外周面側の雄ネジ４の下部には、容器２の外方側に突出し、下方側に向く面を有する係止部２８を形成している。フラップ３０は、容器蓋１の閉栓時に、フラップ３０が畳まれた状態で係止部２８を乗り越えると、フラップ３０の先端部が容器２の中心側に向き、係止部２８の下方に位置される。 A rectangular plate-like flap 30 is connected to the lower side of the inner peripheral surface of the bottom 10 of the container lid 1, and the flap 30 is formed with the tip side obliquely upward toward the inner peripheral surface of the container lid 1. ing. As for the flap 30, the base end side which is a connection part with the container lid 1 plays the role of a hinge part, and the flap 30 has flexibility by the elastic effect of resin. As shown in FIGS. 4 and 5, the flap 30 is provided on the inner peripheral surface of the skirt 10, and is formed at intervals in the circumferential direction of the skirt 10. As shown in FIG. 2, a locking portion 28 that protrudes outward of the container 2 and has a surface facing downward is formed at the lower portion of the external thread 4 on the outer peripheral surface side of the mouth / neck portion 3 of the container 2. ing. When the flap 30 climbs over the locking portion 28 with the flap 30 folded when the container lid 1 is closed, the tip of the flap 30 faces the center of the container 2 and is positioned below the locking portion 28. The

このような容器蓋１は、ユーザが開栓するときには、片手で容器を握りしめて固定し、他方の手の指先によって容器蓋１を開栓する。主部８を回転させると、雄雌ネジ４，２１の作用により、容器蓋１の全体が上方へ移動するが、タンパーエビデント裾部１０に設けられているフラップ３０が容器２の係止部２８に係止されるので、主部８の側のみが上方へ移動することによって、弱化ライン７の橋絡部１４が切断され、弱化ライン７を境界として、主部８の側が容器２の口頸部３から分離される。
弱化ライン７を分離するときには、通常の開栓時よりも負荷が大きいが、本実施形態では、容器蓋１の主部８の周囲には、厚肉部領域１８及び薄肉部領域１９が交互に形成されている。この厚肉部領域１８及び薄肉部領域１９の段差により、ユーザは主部８に指を当てて、指先が滑ることなく容器蓋１に大きな回転トルクをかけることができる。 When the user opens the container lid 1, the container lid 1 is grasped and fixed with one hand and the container lid 1 is opened with the fingertip of the other hand. When the main portion 8 is rotated, the entire container lid 1 is moved upward by the action of the male and female screws 4, 21, but the flap 30 provided on the tamper evidence skirt 10 is the locking portion of the container 2. 28, the bridge part 14 of the weakening line 7 is cut by moving only the main part 8 side upward, and the main part 8 side is the mouth of the container 2 with the weakening line 7 as a boundary. Separated from the neck 3.
When the weakening line 7 is separated, the load is larger than that during normal opening, but in this embodiment, the thick portion region 18 and the thin portion region 19 are alternately arranged around the main portion 8 of the container lid 1. Is formed. Due to the step between the thick portion region 18 and the thin portion region 19, the user can apply a large rotational torque to the container lid 1 without putting the finger on the main portion 8 and slipping the fingertip.

容器蓋１の剛性については、主部８の厚さだけで比較すれば、厚肉部領域１８のある部分の剛性が大きく薄肉部領域１９のある部分の剛性が小さい。しかしながら、本実施形態では、図３に示すように、ネジ部２１ａのある部分は、薄肉部領域１９のある主部８の内周面の位置に対応させて配置し、ネジ部２１ａのない欠落部２１ｂの部分は、厚肉部領域１８のある主部８の内周面の位置に対応させて配置させている。そして、ネジ部２１ａの端部を厚肉部領域１８の外側両端部の大突部１８ａまで延長することによって、厚肉部領域１８と薄肉部領域１９の境界部における剛性を大きくし、容器蓋１の主部８の強度のバランスが均一になるようにしている。こうして容器蓋１の強度のバランスをとることによって、容器蓋１の成形時における冷却効率が向上し、離型抵抗のバランスをとることが可能となり、ネジダレ等を抑制することができる。 As for the rigidity of the container lid 1, if only the thickness of the main portion 8 is compared, the rigidity of the portion with the thick portion region 18 is large and the rigidity of the portion with the thin portion region 19 is small. However, in this embodiment, as shown in FIG. 3, the portion with the screw portion 21 a is arranged corresponding to the position of the inner peripheral surface of the main portion 8 with the thin portion region 19, and the missing portion without the screw portion 21 a. The part 21b is arranged corresponding to the position of the inner peripheral surface of the main part 8 where the thick part region 18 is located. And the rigidity in the boundary part of the thick part area | region 18 and the thin part area | region 19 is enlarged by extending the edge part of the screw part 21a to the large protrusion 18a of the outer both ends of the thick part area | region 18, and a container lid The balance of the strength of the main portion 8 is made uniform. By balancing the strength of the container lid 1 in this way, the cooling efficiency at the time of molding the container lid 1 can be improved, the balance of the mold release resistance can be balanced, and screw sag or the like can be suppressed.

また、大突部１８ａの高さが通常の大きさであり、小突部１９ａ〜１９ｃの突出部は大突部１８ａよりも小さいので、その小突部１９ａ〜１９ｃの大きさが小さい分だけ、主部（スカート壁６）８を肉薄にして、容器蓋１の軽量化及び材料費の節約を図っている。さらに、雌ネジ形成領域２１には、薄肉部領域がある部分に対応させてネジ部２１ａを形成し、剛性の大きな厚肉部領域１８には、欠落部２１ｂとして、ネジ山（ネジ部２１ａ）を形成しない部分を設け、さらなる容器蓋１の軽量化及び材料の節約を図っている。 Moreover, since the height of the large protrusion 18a is a normal size and the protrusions of the small protrusions 19a to 19c are smaller than the large protrusion 18a, the size of the small protrusions 19a to 19c is small. The main part (skirt wall 6) 8 is thinned to reduce the weight of the container lid 1 and save material costs. Further, the female screw forming region 21 is formed with a screw portion 21a corresponding to a portion where the thin portion region is present, and the thread portion (screw portion 21a) is provided as a missing portion 21b in the thick portion 18 having a large rigidity. The part which does not form is provided, and the weight saving of the container lid 1 and the saving of material are aimed at.

容器蓋１は、飲料などの充填時に保治具（図示せず）によって、容器蓋１が保持され、一定の荷重、回転トルクによって容器蓋１を容器２に巻き締めする。この際、複数の突部１７（特に大突部１８ａ）の凹凸形状が保治具に係止され、容器蓋１の巻き締めの際にスリップを防止するが、保治具の突部１７への引っ掛かりは問題なく、巻き締め角度のバラツキなどに支障が生じなかった。
なお、容器蓋１のスカート壁６の裾部１０には、フラップ３０を裾部１０の周方向に間隔を開けて配設しているが、少なくとも薄肉部領域１９のある部分に対応させてフラップ３０を形成し、厚肉部領域１８のある部分にはフラップ３０を省略して、薄肉部領域１９の剛性強化をするようにしてもよい。 When the container lid 1 is filled with a beverage or the like, the container lid 1 is held by a holding jig (not shown), and the container lid 1 is wound around the container 2 with a constant load and rotational torque. At this time, the concavo-convex shape of the plurality of protrusions 17 (particularly the large protrusion 18a) is locked to the holding jig to prevent slipping when the container lid 1 is tightened, but the holding jig is caught on the protrusion 17 There was no problem, and there was no problem with variations in winding angle.
A flap 30 is disposed at the skirt portion 10 of the skirt wall 6 of the container lid 1 at intervals in the circumferential direction of the skirt portion 10. 30 may be formed, and the flap 30 may be omitted from a portion where the thick portion region 18 is present, so that the rigidity of the thin portion region 19 is enhanced.

次に、本発明の第２の実施形態について説明する。
図６は本実施形態の容器蓋の側断面図、図７は図６の容器蓋のＹ−Ｙ線方向における断面図であり、天面壁部分を省略した図である。なお、上記実施形態と同一名称部については、同一の符合を付して説明する。
上記第１の実施形態では、図３に示すように、雌ネジ形成領域２１においては、小突部領域１９がある部分に対応させてネジ部２１ａを形成し、剛性の大きな大突部領域１８がある部分に対応させて欠落部２１ｂが位置し、容器蓋１の強度のバランスをとるようにしていた。
しかしながら、例えば、ネジ山が周方向に１．５回転などの場合は、ネジ部が上下方向に２重になって存在する部分と、重なり部がなく単一に存在する部分があり、このような場合、単一に存在する部分は、ネジ部が上下方向に２重になって存在する部分よりも主部の剛性が低くなるため、このようなネジ部が上下方向に単一に存在する部分に欠落部を形成すると、更にこの部分の剛性が他の部分と比べて低くなると考えられる。本実施形態では、このようなネジ部が上下方向に単一に存在する部分には欠落部を形成しないようにして、容器蓋の剛性のバランスを考慮するものである。 Next, a second embodiment of the present invention will be described.
6 is a side sectional view of the container lid of the present embodiment, and FIG. 7 is a sectional view of the container lid of FIG. 6 in the YY line direction, with the top wall portion omitted. In addition, about the same name part as the said embodiment, the same code | symbol is attached | subjected and demonstrated.
In the first embodiment, as shown in FIG. 3, in the female screw formation region 21, a screw portion 21 a is formed corresponding to a portion where the small protrusion region 19 is present, and the large protrusion region 18 having high rigidity. Corresponding to a certain part, the missing part 21b is positioned so that the strength of the container lid 1 is balanced.
However, for example, when the screw thread is 1.5 rotations in the circumferential direction, there are a portion where the screw portion is doubled in the vertical direction, and a portion where there is no overlapping portion and there is a single portion. In this case, since the rigidity of the main portion is lower than the portion where the screw portion is doubled in the vertical direction, the single screw portion exists in the vertical direction. If a missing part is formed in a part, it is considered that the rigidity of this part is further reduced compared to other parts. In this embodiment, the balance of rigidity of the container lid is taken into consideration by not forming a missing portion in a portion where such a screw portion exists in the vertical direction.

本実施形態の容器蓋１は、図６及び図７に示すように、容器蓋１の内面に螺旋状に形成される雌ネジ形成領域２１には、容器蓋１の上下方向にネジが２重に重ねられているネジ周方向多重領域Ｍと、上下に重ねられておらず１本のみのネジ周方向単一領域Ｓとが設けられている。そして、このネジ周方向単一領域Ｓは、ネジ山が上下に２重に形成されていないので、ネジ周方向多重領域Ｍの部分に比較して剛性が小さくなる。
そこで、本実施形態では、ネジ周方向単一領域Ｓ内では、小突部領域１９がある領域のみならず大突部領域１８がある部分についても、欠落部２１ｂを形成しないで、連続ネジ部２１ｄを形成している。詳しくは、雌ネジ形成領域２１の一端（始端）部のネジ部２１ａが形成されていない側から、他端（終端）部までの間にあるネジ周方向単一領域Ｓ間にネジ部を形成し、さらに本実施形態ではこのネジ周方向単一領域Ｓの両端に隣接するネジ部２１ａまで連続させて、連続ネジ部２１ｄを形成している。
こうして、ネジの巻き数が１周目から２周目までの間にあり、上下方向にネジが１本のみ存在する部分において、容器蓋１の周壁に対する剛性が過剰に弱くなることを防止している。 As shown in FIGS. 6 and 7, the container lid 1 of the present embodiment has double screws in the vertical direction of the container lid 1 in the female screw forming region 21 formed in a spiral shape on the inner surface of the container lid 1. And a single screw circumferential direction single region S that is not overlapped vertically is provided. The screw circumferential direction single region S is less rigid than the screw circumferential direction multiple region M because the screw threads are not formed in a double layer.
Therefore, in the present embodiment, in the screw circumferential direction single region S, not only the region having the small protrusion region 19 but also the portion having the large protrusion region 18 does not form the missing portion 21b, and the continuous screw portion. 21d is formed. Specifically, a threaded portion is formed between the screw circumferential direction single region S between the side where the threaded portion 21a of the one end (starting end) portion of the female thread forming region 21 is not formed and the other end (terminated) portion. Furthermore, in this embodiment, the continuous screw portion 21d is formed by continuing to the screw portions 21a adjacent to both ends of the screw circumferential direction single region S.
In this way, it is possible to prevent the rigidity of the peripheral wall of the container lid 1 from becoming excessively weak in a portion where the number of turns of the screw is between the first and second turns and only one screw is present in the vertical direction. Yes.

次に、本発明の容器蓋の実施例について説明する。
［実施例］
試験例１として、図３に示す大突部と小突部の配置別又は小突部の有無等による、容器蓋の開栓性、キャッピング適正、重量を試験した。容器蓋の開栓性は、容器蓋の開栓時における容器蓋の引っ掛かり性を比較した。キャッピング適性は、容器に容器蓋を閉栓するときに、保治具が一定の荷重、回転トルクで容器蓋を巻き締めるが、突部を係止する保治具が、スリップしないように、安定して閉栓できる適性を比較した。 Next, examples of the container lid of the present invention will be described.
[Example]
As Test Example 1, the openability of the container lid, the capping suitability, and the weight were tested depending on the arrangement of the large protrusions and the small protrusions shown in FIG. The capability of the container lid was compared with the catchability of the container lid when the container lid was opened. The capping suitability is that when the container lid is closed on the container, the retainer wraps the container lid with a constant load and rotational torque, but the retainer that locks the protrusions is stably closed so that it does not slip. We compared the aptitude that can be done.

図８のＡは、実施例１の容器蓋を示し、容器蓋のスカート壁６の主部８に形成される厚肉部領域１８には、同じ大きさの大突部１８ａが５個並設され、薄肉部領域１９には、大突部１８ａの大きさよりも小さい小突部１９ａ〜１９ｃが５個並設されている。そして、厚肉部領域１８の外側端部にある大突部１８ａと薄肉部領域１９にわたってネジ部２１ａが形成されている。なお、この容器蓋は図１〜図５に示した容器蓋１と同じ形状である。
図８のＢは、実施例２の容器蓋を示し、容器蓋のスカート壁６の主部８に形成される厚肉部領域１８には、同じ大きさの大突部１８ａが６個並設され、薄肉部領域１９に位置する周壁部１６には、突部を形成していない。厚肉部領域１８の外側端部にある大突部１８ａと薄肉部領域１９にわたってネジ部２１ａが形成されている。 8A shows the container lid of Example 1, and five large protrusions 18a having the same size are arranged in parallel in the thick portion region 18 formed in the main portion 8 of the skirt wall 6 of the container lid. In the thin portion 19, five small protrusions 19 a to 19 c smaller than the size of the large protrusion 18 a are arranged side by side. A screw portion 21 a is formed across the large protrusion 18 a and the thin portion region 19 at the outer end of the thick portion region 18. The container lid has the same shape as the container lid 1 shown in FIGS.
FIG. 8B shows the container lid of the second embodiment, and six large protrusions 18a having the same size are arranged in parallel in the thick portion region 18 formed in the main portion 8 of the skirt wall 6 of the container lid. In addition, no protrusion is formed on the peripheral wall portion 16 located in the thin portion region 19. A threaded portion 21 a is formed across the large protrusion 18 a and the thin portion region 19 at the outer end of the thick portion region 18.

図８のＣは、実施例３の容器蓋を示し、容器蓋のスカート壁６の主部８に形成される厚肉部領域１８には、同じ大きさの大突部１８ａが５個並設され、薄肉部領域１９には、この薄肉部領域１９の中央部に大突部１８ａよりも小さい小突部１９ａが１つ形成され、この突部１９ａと隣り合う厚肉部領域１８との間には、突部が形成されていない部分が設けられている。そして、厚肉部領域１８の外側端部にある大突部１８ａと薄肉部領域１９にわたってネジ部２１ａが形成されている。
図８のＤは、比較例１の容器蓋を示し、容器蓋のスカート壁６の主部８には、厚肉部領域１８及び薄肉部領域１９が形成されておらず、大突部１８ａと小突部１９ａが交互に並んで形成されている。
図８のＥは、比較例２の容器蓋を示し、容器蓋のスカート壁６の主部８は全体として厚肉部で形成され、周壁部１６から外側に大突部１８ａが突出している。
これらの試験結果を表１に示す。 C of FIG. 8 shows the container lid of Example 3, and five large protrusions 18a of the same size are arranged in parallel in the thick part region 18 formed in the main part 8 of the skirt wall 6 of the container lid. In the thin wall region 19, one small protrusion 19a smaller than the large protrusion 18a is formed at the center of the thin wall region 19, and a gap between the protrusion 19a and the adjacent thick wall region 18 is formed. Is provided with a portion where no protrusion is formed. A screw portion 21 a is formed across the large protrusion 18 a and the thin portion region 19 at the outer end of the thick portion region 18.
D of FIG. 8 shows the container lid of Comparative Example 1, and the main portion 8 of the skirt wall 6 of the container lid is not formed with the thick portion region 18 and the thin portion region 19, and the large protrusion 18a and The small protrusions 19a are formed alternately.
E of FIG. 8 shows the container lid of the comparative example 2, the main part 8 of the skirt wall 6 of the container lid is formed as a thick part as a whole, and the large protrusion 18a protrudes from the peripheral wall part 16 to the outside.
The test results are shown in Table 1.

表１中の評価における◎、○、△は◎が最も評価が高く、それらの順にしたがって評価を低くしたものであるが、△が不可で使用に不向きであることを意味するものではない。
試験結果から、実施例１及び実施例２のように、明確な厚肉部領域及び薄肉部領域を設けたものは、開栓性についての評価が高かった。比較例１及び比較例２のように厚肉部領域と薄肉部領域の両者がない容器蓋は、開栓時に引っ掛かりが弱く、開閉時の開栓性の評価は低かった。

◎, ○, and Δ in the evaluations in Table 1 are the highest evaluations, and the evaluations are low in the order of those, but Δ does not mean that they are not suitable for use.
From the test results, as in Example 1 and Example 2, those having a clear thick part region and a thin part region were highly evaluated for openability. As in Comparative Examples 1 and 2, the container lid without both the thick part region and the thin part region was weakly caught when opened, and the evaluation of the opening property at the time of opening and closing was low.

次に、試験例２として、図３に示す厚肉部領域の両端位置にある大突部の周方向角度θを変えて、容器蓋の開栓性などを試験した。
容器蓋の条件として、薄肉部領域は、上記実施の形態で示したものと同じ突部形状（突部数５）とし、厚肉部領域の大突部のピッチを変更することなく、大突部の数を増減することによって周方向角度θの大きさを変更した。なお、大突部及び小突部の１ピッチの周方向角度は３度である（全体として１２０山）。図３に示す厚肉部領域の周方向角度θは、大突部が４ピッチであるので１２度である。（実施例１）
実施例４として、周方向角度θが６度（３山）のもの、実施例５（なお、実施例１と同一形状であるが、説明の便宜上別の実施例５とした）としてθが１２度（５山）、実施例６としてθが２７度（１０山）、実施例７としてθが４２度（１５山）のもの、実施例８として５７（２０山）度のものを同一容器によって容器蓋の開閉を行い、指先の容器蓋への引っ掛かり具合（開閉性）、開閉時における指の突部への食い込みや感触具合（開栓感触性）及び容器蓋の重量を調べてみた。
その結果を表２に示す。 Next, as Test Example 2, the openability of the container lid and the like were tested by changing the circumferential angle θ of the large protrusions at both ends of the thick portion region shown in FIG.
As a condition of the container lid, the thin wall region has the same protrusion shape (number of protrusions 5) as that shown in the above embodiment, and the large protrusion without changing the pitch of the large protrusion in the thick wall region. The size of the circumferential angle θ was changed by increasing or decreasing the number of. In addition, the circumferential direction angle of 1 pitch of the large protrusion and the small protrusion is 3 degrees (120 mountains as a whole). The circumferential angle θ of the thick portion region shown in FIG. 3 is 12 degrees because the large protrusions have 4 pitches. Example 1
Example 4 has a circumferential angle θ of 6 degrees (three peaks), and Example 5 (which has the same shape as Example 1, but is another example 5 for convenience of explanation) has a θ of 12. Degree (5 ridges), Example 6 with θ of 27 degrees (10 ridges), Example 7 with θ of 42 degrees (15 ridges), and Example 8 with 57 (20 ridges) in the same container The container lid was opened and closed, and the degree of hooking of the fingertip onto the container lid (opening / closing property), the biting and touching feeling of the finger at the time of opening and closing (opening feeling), and the weight of the container lid were examined.
The results are shown in Table 2.

表２中の評価における◎、○、△は◎が最も評価が高く、それらの順にしたがって評価を低くしたものであるが、△が不可で使用に不向きであることを意味するものではない。
周方向角θの角度が大きくなると、実施例８ように開栓性が悪くなるが、キャッピング適性は向上する。容器蓋の重量については、当然ではあるが、大突部の数が多い実施例８が最も重く、大突部の数が少ない実施例４が最も軽量である。このように実施例４では、小突部を形成している分だけ容器蓋の軽量化を図ることができた。なお、小突部の部位は主部が薄肉になったため、剛性が失われるが、上述したようにネジ部を形成して補強している。

In the evaluations in Table 2, 評価, ○, and Δ are the highest evaluations, and the evaluations are lower in the order, but Δ does not mean that they are unsuitable for use.
When the angle of the circumferential direction angle θ is increased, the capping ability is deteriorated as in the eighth embodiment, but the capping suitability is improved. As for the weight of the container lid, of course, Example 8 with the large number of large protrusions is the heaviest, and Example 4 with the small number of large protrusions is the lightest. Thus, in Example 4, the weight of the container lid could be reduced by the amount of forming the small protrusion. In addition, since the main part became thin in the site | part of the small protrusion part, although rigidity is lost, as mentioned above, it forms and reinforces the screw part.

以上、本発明の各実施形態について説明したが、本発明の技術的思想に基づいて、勿論、本発明は種々の変形又は変更が可能である。
例えば、上記各実施形態では、薄肉部領域１９を中央側に向けて漸次、小突部１９ａ〜１９ｃの大きさを小さくして、容器蓋１の半径方向内側へ突出高さを小さくしたが、小突部は突出高さを同じにして、それらの先端部を同一円周上に配置するようにもできる。 While the embodiments of the present invention have been described above, the present invention can of course be modified or changed in various ways based on the technical idea of the present invention.
For example, in each of the above embodiments, the thin portion region 19 is gradually directed toward the center side, the size of the small protrusions 19a to 19c is gradually reduced, and the protrusion height is reduced inward in the radial direction of the container lid 1, The small protrusions can have the same protrusion height, and their tips can be arranged on the same circumference .

本発明の第１の実施形態の容器蓋の斜視図である。It is a perspective view of the container lid of the 1st embodiment of the present invention. 本発明の容器蓋と容器との係合を示す図であり、図面の中心線より右側は容器蓋の正面図、左側はその断面図である。It is a figure which shows engagement with the container lid of this invention, and a container, The right side is a front view of a container lid from the centerline of drawing, and the left side is the sectional drawing. 図４の容器蓋をＸ−Ｘ線方向に切断した断面図である。It is sectional drawing which cut | disconnected the container cover of FIG. 4 in the XX line direction. 図１の容器蓋を垂直方向へ切断した断面図である。It is sectional drawing which cut | disconnected the container lid of FIG. 1 to the orthogonal | vertical direction. 図１の容器蓋の底面図である。It is a bottom view of the container lid of FIG. 本発明の第２の実施形態の容器蓋の側断面図である。It is a sectional side view of the container lid of the 2nd Embodiment of this invention. 図６の容器蓋のＹ−Ｙ線方向の断面図であり、天面壁部分を省略した図である。It is sectional drawing of the YY line direction of the container lid of FIG. 6, and is a figure which abbreviate | omitted the top | upper surface wall part. 図８のＡは本発明の実施例１における容器蓋の突部形状の断面図であり、図８のＢは本発明の実施例２における容器蓋の突部形状の断面図であり、図８のＣは本発明の実施例３における容器蓋の突部形状の断面図であり、図８のＤは比較例１における容器蓋の突部形状の断面図であり、図８のＥは比較例２における容器蓋の突部形状の断面図である。8A is a cross-sectional view of the shape of the protrusion of the container lid according to the first embodiment of the present invention, and FIG. 8B is a cross-sectional view of the shape of the protrusion of the container lid according to the second embodiment of the present invention. C of FIG. 8 is a sectional view of the shape of the protrusion of the container lid in Example 3 of the present invention, D in FIG. 8 is a sectional view of the shape of the protrusion of the container lid in Comparative Example 1, and E in FIG. FIG. 2 is a cross-sectional view of a shape of a protrusion of a container lid in FIG.

Explanation of symbols

１容器蓋
２容器
３口頸部
５天面壁
６スカート壁
７弱化ライン
８主部
１０裾部
１６周壁部
１７複数の突部
１８厚肉部領域
１８ａ大突部
１９薄肉部領域
１９ａ〜１９ｃ小突部
２１雌ネジ形成領域
２１ａネジ部（雌ネジ）
２１ｂ欠落部 DESCRIPTION OF SYMBOLS 1 Container lid 2 Container 3 Mouth neck part 5 Top wall 6 Skirt wall 7 Weakening line 8 Main part 10 Bottom part 16 Peripheral wall part 17 Plural protrusions 18 Thick part area 18a Large protrusion 19 Thin part area 19a-19c Small protrusion Part 21 Female thread forming region 21a Thread part (female thread)
21b Missing part

Claims

A top skirt wall and a cylindrical skirt wall depending from the peripheral edge of the top wall, the skirt wall being a main portion above a breakable weakening line extending in the circumferential direction and below the weakening line The skirt wall is divided into at least a skirt wall, and a plurality of thick part areas and a plurality of thin part parts are formed on at least the peripheral wall part of the main part of the skirt wall. form shape over the circumferential direction of the peripheral wall portion, the female screw forming region of the peripheral wall inner surface of the main portion in the container closure forming a female screw to be engaged with the neck of the container,
The main portion is provided with a peripheral wall portion having the same thickness, and the thick portion region is formed by a plurality of protrusions of a line protruding outside the peripheral wall portion and extending in the vertical direction of the main portion. The thin wall region is formed from a plurality of protrusions of a line projecting outside the peripheral wall portion and extending in the vertical direction of the main portion,
Furthermore, the thick wall region is composed of a plurality of large protrusions having a large height among the protrusions formed in the circumferential direction of the peripheral wall portion, and the thin wall region is formed in the circumferential direction of the peripheral wall portion. Among the protrusions, a plurality of small protrusions having a smaller height than the large protrusions are formed.
The thin wall region and the thick wall region are formed alternately and continuously,
The female screw forming region is formed with the female screw composed of a plurality of screw portions that are screw threads and a plurality of missing portions where the screw thread is missing, and at least on the inner peripheral surface of the peripheral wall portion of the thin-walled region. A threaded portion is disposed, and at least the thick wall region is disposed on the outer surface of the peripheral wall where the missing portion is located ,
The screw portion is formed on the inner peripheral surface of the peripheral wall portion from both ends of the adjacent thick portion region to the thin portion region, and the screw portion is formed on the inner peripheral surface corresponding to both end portions of the thick portion region. A container lid characterized in that inclined portions formed at both ends of the container are positioned .

2. The container lid according to claim 1 , wherein in the small protrusion region, the protrusion height of the small protrusion gradually decreases from the outer circumferential side toward the intermediate side.