CN101094793B - 罐的金属盖 - Google Patents

罐的金属盖 Download PDF

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CN101094793B
CN101094793B CN2005800456206A CN200580045620A CN101094793B CN 101094793 B CN101094793 B CN 101094793B CN 2005800456206 A CN2005800456206 A CN 2005800456206A CN 200580045620 A CN200580045620 A CN 200580045620A CN 101094793 B CN101094793 B CN 101094793B
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CN101094793A (zh
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A·C·T·阿尔瓦雷斯
A·R·塞内
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Abstract

本发明涉及一种用于罐的金属盖，所述罐具有界定了支座(S)的开口(14)，所述盖(20)以整体形式包括底壁(21)，该底壁在上方且外周地结合有侧壁(22)，所述侧壁(22)具有自由上边缘(23)并设计成能摩擦安置且轴向保持在支座(S)的内部。根据本发明，底壁(21)包括邻近侧壁(22)的外周环形部分(21a)、中央部分(21b)和环形肋部分(25)，所述环形肋部分的横截面为大致倒U形，并且其侧腿的相邻边分别结合到底壁(21)的外周环形部分(21a)和中央部分(21b)的相邻边缘上。

Description

罐的金属盖
技术领域
本发明涉及具有外周侧壁的金属盖，所述侧壁设置有自由上边缘并且其设计成能摩擦安置且轴向保持在界定于罐的上部开口中的支座内。
背景技术
上述类型的金属盖众所周知。它们由整块金属片制成并且包括大致盘状底壁，其周边结合有向上伸出的侧壁，从而可移动地压配合且轴向保持在界定于罐的上部开口中的支座内。所述支座可以由悬垂管状突出部分界定，所述悬垂管状突出部分在上方结合(incorporated)到罐顶壁的中央开口上，所述罐具有圆形或多边形截面。
上述类型的金属盖公开并显示于专利US2,074,231，US3,347,408，BR-MU8002622-2，BR-MU8002618-4，BR-PI9408643-5和BR-MU7601221-2中，后两篇专利与本专利申请属于同一申请人。
在这些现有技术结构中，盖结构只包括底壁和外周侧壁，并且盖轴向保持在界定于罐的上部开口中的支座内通常通过接合装置实现，所述接合装置设置在由盖侧壁和上部开口内支座的部件限定的至少一个部件中，从而与另一个部件相配合。
在上述结构中，即使当盖底壁具有凹陷(drawn)或凸起的中央部分时，如公开于专利BR-MU7601221-2和US3,347,408中的解决方案所教导的那样，盖结构在施加闭合力时也要特别小心，否则盖会受到不可弥补的损坏，使盖不能紧密牢固地闭合。
上述结构缺陷源于以下事实，即，所述盖结构缺乏设置有外周环形凹部的金属盖中所保证的普通外周强度，所述外周环形凹部通常具有倒置的基本梯形横截面、摩擦安置在具有互补横截面的凹部内，在该凹部中界定了结合到罐体的环形顶壁上的支座，例如数十年来已知的结构，该结构公开和显示在提交于1904年的专利US795,126中。
在这一众所周知的结构中，盖结构允许其在放置于罐的上部环形壁上时被压紧，而不会使盖形状产生塑性变形，从而避免所述盖紧密保持在罐的支座内。
外周凹部的结构连同其连接有盖的突起中央部分的区域给所述盖提供了高结构强度，从而允许用户通过安装盖和在盖的不同位置施加作用力而使罐关闭，而不会产生使盖变形或使其丧失初始形状的风险。
发明内容
与上述缺陷相关，并且相对于设置有摩擦安置且轴向保持在界定于罐开口中的支座内的侧壁的金属盖而言，本发明的目的在于提供一种此处考虑类型的金属盖，其具有较高的结构强度，从而允许盖充分且正确地闭合，而不需要在将盖安装到相应支座中时施加轴向压缩力的时候特别小心。
本发明的这个及其他目的和优点通过提供上述类型的金属盖实现，所述金属盖的底壁包括邻近盖侧壁的外周环形部分、中央部分和环形肋部分，所述环形肋部分的横截面为大致倒U形，并且其侧腿的自由边分别结合到底壁的外周环形部分和中央部分的相邻边上。
利用上文限定的结构，罐底壁的中央部分和外周环形部分通过所述环形肋部分彼此连接，所述环形肋部分最好从底壁的所述中央部分和外周环形部分向上伸出，界定了结合到底壁本身上并与所述侧壁以一径向距离隔开的结构元件，所述径向距离等于底壁的外周环形部分的径向宽度。设置环形肋部分使所述盖具有一结构强度，其充分大于利用上述现有技术结构实现的结构强度，而无需增大形成盖的金属片的厚度。
此外，本发明的盖结构可以实现为将底壁的中央部分保持在与包含所述底壁的外周环形部分的平面相比更高的平面内，从而允许与环形肋部分连接在一起的中央部分起到支撑元件的作用，其中当盖堆叠于封罐机的供盖装置中时，所述支撑元件用于将一个盖放在另一个盖上。
附图说明
下面将参考附图，举例说明本发明盖的可能结构来描述本发明，其中：
图1是罐的上部区域的局部径向剖视图，根据现有技术构造的盖装入所述罐的排出端开口中；
图2是与图1类似的视图，但是显示了根据本发明构造的盖；和
图3是本发明的多个盖在一个堆叠在另一个上时的局部径向剖视图。
具体实施方式
如图所示，本发明的盖应用于罐10，所述罐仅以其侧壁11的上部图解表示，通常通过双重卷边12固定所述侧壁11的上边缘12，在所述环形顶壁13的外周边的中间区域中设置有开口14，悬垂管状突出部分15结合到所述开口的边缘上，所述悬垂管状突出部分界定了用于罐盖的支座(S)。在图1显示并作为本发明申请人的巴西专利BR-PI9408643-5的目标的现有技术结构中，悬垂管状突出部分15具有向开口14内弯曲，随后向上并抵靠悬垂管状突出部分15的下端部，从而形成连续管状肋16，该连续管状肋例如可以为圆形，如所述现有技术专利中描述的那样。
但是，应当理解，罐10的环形顶壁13的悬垂管状突出部分15的结构可以具有不同的结构布置，如上述现有技术文献中显示和讨论的那样，而没有改变本发明的结构和功能目标的所述结构性改进。
如上所述，本发明的盖20由整块金属片制成，包括通常为平圆盘形式的底壁21，其在上方且外周地结合有侧壁22，所述侧壁22具有自由上边缘23并且设计成能摩擦安置并轴向保持在由开口14的悬垂管状突出部分15界定的支座″S″内，所述开口设置在环形顶壁13中。
在附图显示的示例性结构中，盖20的侧壁22设置有连续外周凹部24，悬垂管状突出部分15的连续管状肋16密封安装并轴向保持在所述连连续外周凹部24内。在图示结构中，悬垂管状突出部分15的连续环形肋16和盖20的侧壁22的连续外周凹部24具有至少部分圆形且互补的轮廓，使得所述部件的相互支撑不但有利于将盖20轴向保持在罐10的开口14内，而且有利于在该摩擦安置区域内实现密封。但是，应当理解，连续环形肋16和连续外周凹部24可以具有除了附图所示管状圆形之外的结构，如说明书起始部分提及的现有技术文献所示。
仍然根据图示实施例，盖20的自由上边缘23向外、向下弯曲并抵靠侧壁22，从而界定安置在位于围绕开口14的区域内的罐10的环形顶壁13上的管状上部肋23a。因此，应当理解，如上述现有技术文献中所示，罐20的侧壁22的自由上边缘23可以具有不同的结构形式，而没有改变此处所提发明的功能特征的盖20的侧壁22的上部区域中的形式和布置的所述改进。
根据本发明，盖20的底壁21包括邻近侧壁22的外周环形部分21a、通常为平坦盘形的中央部分21b、以及环形肋部分25，所述环形肋部分的横截面为大致倒U形，并且其侧腿的自由边分别结合到底壁21的外周环形部分21a和中央部分21b的相邻周边上。
环形肋部分25与盖20的其余部分模压连接在一起，以便最好从底壁21的外周环形部分21a和中央部分21b向上伸出。如图所示，底壁(21)的外周环形部分(21a)的径向宽度近似等于盖(20)的侧壁(22)的高度，使环形肋部分25与所述侧壁22隔开足够的距离，从而给盖20的边缘区域提供必要的结构强度以抵抗当盖20安装到罐10的开口14中时施加到所述盖20上的压缩力。
仍然根据优选实施例，底壁21的中央部分位于较包含所述底壁21的外周环形部分21a的平面而言更高的平面内。该结构布置允许底壁21的中央部分21b与环形肋部分25操作连接在一起，从而在所述盖堆叠在自动封罐机的供盖装置中时界定将一个盖放在另一个盖上的支撑元件，或者在所述盖被二重卷边连接到罐10的侧壁11上之前允许盖20自动装入相应的环形顶壁13中。
如图3中较好显示的，在盖20堆叠期间，外周环形部分21a的内外周边分别安置在盖20的侧壁22的外周凹部24上和环形肋部分25上，从而确保盖20相互支撑，并且它们的轴线同轴布置，侧壁22的自由上边缘23保持轴向隔开。
环形肋部分25进一步以下列方式构造和设定尺寸，以便位于包含盖20的侧壁22的上部自由边23的平面Ps(图2)以下，盖部件的这种相对尺寸设定与上述图3中限定的堆叠特征有关。
在图示实施例中，环形肋部分25具有位于平面Pm(图2)内的上边缘25a，所述平面Pm与通常位于结构内的外周凹部24区域中的盖20的侧壁22相交，其中侧壁22具有连续外周凹部24，该连续外周凹部用于接收罐10的上部环形壁13的悬垂管状突出部分15的相应的连续外周肋16。在图示实施例中，盖20的底壁21的外周环形部分21a和中央部分21b为平坦的，底壁21的所述中央部分21b位于一平面内，该平面略低于包含环形肋部分25的相邻侧腿的自由下边缘的平面Pi(图2)，所述中央部分21b具有向上向外倾斜的边缘环形区域21c，从而与环形肋部分25的所述自由下边缘相配合。
尽管此处只举例说明了盖(连同支座结构)的一个实施例，但是应当理解，在不脱离限定在所附权利要求中的建设性概念的情况下，可以改变部件形式。

Claims (7)

1.一种用于罐的金属盖，所述罐具有界定了支座(S)的开口(14)，盖(20)安置在所述支座(S)上，盖(20)以一体件方式包括底壁(21)，该底壁在上方且沿外周结合有侧壁(22)，所述侧壁(22)具有自由上边缘(23)并设计成能摩擦安置且轴向保持在支座(S)的内部，
其特征在于，所述底壁(21)包括邻近侧壁(22)的外周环形部分(21a)、中央部分(21b)和环形肋部分(25)，所述环形肋部分的横截面为倒U形，其中侧腿的自由边分别结合到底壁(21)的外周环形部分(21a)和中央部分(21b)的相邻边上；所述底壁(21)的外周环形部分(21a)的径向宽度近似等于盖(20)的侧壁(22)的高度，并且，所述环形肋部分(25)从底壁(21)的外周环形部分(21a)和中央部分(21b)向上伸出。
2.如权利要求1所述的金属盖，其特征在于，所述底壁(21)的中央部分(21b)位于相对包含底壁(21)的外周环形部分(21a)的平面更高的平面内。
3.如权利要求1所述的金属盖，其特征在于，所述环形肋部分(25)布置在包含盖(20)的侧壁(22)的自由上边缘(23)的平面(Ps)以下。
4.如权利要求1所述的金属盖，其中，所述开口(14)设置在罐的顶壁(13)中，并且支座(S)由在上方结合到开口(14)的边缘上的悬垂管状突出部分(15)所界定，所述悬垂管状突出部分(15)设置有下端部，该下端部向开口(14)内弯曲，随后向上并抵靠悬垂管状突出部分(15)，形成连续管状肋(16)，盖(20)的侧壁(22)设置有连续外周凹部(24)，悬垂管状突出部分(15)的连续管状肋(16)密封安装并轴向保持在所述连续外周凹部(24)内，其特征在于，环形肋部分(25)具有位于一平面(Pm)内的上边缘(25a)，所述平面与位于盖(20)连续外周凹部(24)的区域内的盖(20)的侧壁(22)相交。
5.如权利要求4所述的金属盖，其特征在于，一个盖(20)的外周环形部分(21a)的内外边缘分别安置在另一个盖(20)的外周凹部(24)和环形肋部分(25)上，当所述盖(20)堆叠时，所述另一个盖设置为在下方紧挨着所述一个盖。
6.如权利要求1所述的金属盖，其特征在于，盖(20)的底壁(21)的外周环形部分(21a)和中央部分(21b)为平坦的。
7.如权利要求6所述的金属盖，其特征在于，盖(20)的底壁(21)的中央部分(21b)位于一平面内，该平面略低于包含环形肋部分(25)的相邻侧腿的自由下边缘的平面(Pi)，所述中央部分(21b)具有边缘环形区域(21c)，该边缘环形区域向上向外倾斜以与环形肋部分(25)的所述自由下边缘相配合。
CN2005800456206A 2004-12-02 2005-11-25 罐的金属盖 Expired - Fee Related CN101094793B (zh)

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