JPH085506B2 - Can container - Google Patents

【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、エアゾル缶などの、いわゆる圧力流体を収
容する缶容器の、特に、圧力解放構造に関する。Description: TECHNICAL FIELD The present invention relates to a can container for containing a so-called pressure fluid, such as an aerosol can, and more particularly to a pressure release structure.

［従来技術］ 缶容器の火中への投入や環境温度の上昇などにより缶
内圧力が異常に高くなったとき、缶が吹き飛ぶ危険性を
防ぐために、缶に圧力上昇によって裂開するスコアを設
け、裂開部分から内部の圧力（ガス）を徐々に漏洩させ
る手段が、例えば特公昭51-31606号公報や実公昭57-123
20号公報によって知られている。[Prior Art] In order to prevent the risk of the can being blown out when the pressure inside the can becomes abnormally high due to the throwing of the can into a fire or the rise in environmental temperature, a score is provided on the can that causes the pressure to increase. The means for gradually leaking the internal pressure (gas) from the dehiscence portion is disclosed in, for example, Japanese Patent Publication No. 51-31606 and Japanese Utility Model Publication No. 57-123.
Known from publication 20.

［発明が解決しようとする課題］ 上記従来技術の前者は、第４図に示す如く、缶胴
（イ）に巻締めたドーム状の金属蓋（ロ）の巻締め部の
頂部、つまり、巻締めにより缶胴内壁に沿って当接垂下
した垂直蓋板部分（ハ）の途中から、巻締めの頂部にま
たがる範囲にスコア（ニ）を設けたものであるが、この
ものは内圧上昇によって圧力が矢印方向に働き、缶胴内
壁と垂直蓋板部分（ハ）との当接部に侵入することによ
り、蓋（ロ）が第５図のように膨出変形し、それにより
スコア（ニ）が裂開され、内部のガスを徐々に漏出さ
せ、缶の吹き飛びを防がせるものであるが、問題は上記
スコア（ニ）が上記のような巻締め範囲に設けられてい
るため、蓋（ロ）がその垂直蓋板部分（ハ）と、それに
連なる頂部分とがめくり上がる程大きく変形する状態に
なる迄はスコア（ニ）を破壊させることができず、この
ことは内圧上昇時に直ちに圧の解放を行わせ得ない時間
的遅延による危険性を伴う。[Problems to be Solved by the Invention] As shown in FIG. 4, the former of the above-described prior art is the top of the winding portion of the dome-shaped metal lid (b) wound around the can body (a), that is, the winding. A score (d) is provided in the range that extends from the middle of the vertical cover plate part (c) that abuts and hangs along the inner wall of the can body by tightening to the top of the winding tightening. Works in the direction of the arrow and penetrates into the contact part between the inner wall of the can body and the vertical cover plate part (C), and the cover (B) bulges and deforms as shown in Fig. 5, resulting in a score (D). Is torn open, the gas inside is gradually leaked out, and blown off of the can is prevented, but the problem is that the score (d) is set in the winding range as described above, so the lid ( (B) is deformed to such an extent that the vertical lid plate part (c) and the top part connected to it rise up. The score (d) cannot be destroyed until the condition is reached, which is accompanied by the risk of a time delay that cannot immediately release the pressure when the internal pressure rises.

加えて、缶容器の巻締め頂部に上記のようなスコアを
設けることは、巻締め強度の脆弱化要因をもたらす不合
理な技術といわねばならない。In addition, it must be said that providing the above score on the top of the can container is an irrational technique for weakening the strength of the can.

一方、従来技術の後者は、特に図示しないが缶容器に
巻締められた上向きに膨出するドーム状の底蓋に巻締め
部を外れた位置にスコアを設けたもので、そして作用と
して内圧上昇によって蓋板が下向きに反転し、変形する
ことによりスコアを裂開させることが記載されている
が、そもそも圧は缶胴内に連通する巻締めのの始端、つ
まり巻締めのきわに集中するため、このきわから底蓋の
膨出変形が始まるものであって、底蓋の面に圧が作用し
ても、この面が下向きに反転されることはあり得ず、よ
ってこの開示技術によるスコアからの圧力解放は不能で
あると云わざるを得ない。On the other hand, in the latter of the prior art, although not particularly shown, a score is provided at a position outside the winding portion on a dome-shaped bottom lid that swells upward in a can container and bulges upward, and as a function, the internal pressure rises. It is described that the lid plate is flipped downward by the above and the score is torn by deforming, but in the first place pressure is concentrated at the beginning of the winding tightening that communicates with the inside of the can body, that is, the winding tightening. The bulging deformation of the bottom lid starts from this crease, and even if pressure is applied to the surface of the bottom lid, this surface cannot be inverted downward, and therefore, according to the score according to the disclosed technique, It cannot be said that pressure release is impossible.

そこで、この発明は上記従来技術の前者の問題点に鑑
み、内圧が巻締めのきわに集中することに着目し、この
きわにスコアを設け、このきわから始まる変形が未だ巻
締め部に波及しない時点でスコアを裂開させ、もって時
間的遅延による圧力解放時間の遅れによって生ずる缶の
吹き飛び危険性を防止することを目的とするものであ
る。Therefore, in view of the former problem of the above-mentioned prior art, the present invention focuses on the fact that the internal pressure concentrates on the creases of the winding, and the score is provided on the creases, and the deformation starting from the creases does not yet spread to the tightening portion. The purpose is to rupture the score at this point, thus preventing the risk of blowout of the can caused by the delay of the pressure release time due to the time delay.

［課題を解決するための手段］ 上記目的を達成するための本発明は、缶胴の上端開口
周縁に上向きに膨出するドーム状の金属蓋の周縁を巻締
め、この巻締により缶胴の内壁にそって当接垂下した垂
直蓋板部分の下端に、上記ドームの裾まわりが弧状の落
込み部を介して連なり、該落込み部の下面が上記垂直蓋
板部分と缶胴内壁との当接部に連通する缶容器におい
て、上記落込み部に裂開可能のスコアを円周方向に所要
間隔毎に設けたことを特徴としてなる缶容器を要旨とす
る。[Means for Solving the Problems] The present invention for achieving the above object is to tighten a peripheral edge of a dome-shaped metal lid that bulges upward around the upper end opening peripheral edge of the can body, and by this winding, the can body of the can body is closed. At the lower end of the vertical lid plate portion that abuts along the inner wall, the hem circumference of the dome is connected through an arc-shaped drop portion, and the lower surface of the drop portion connects the vertical lid plate portion and the inner wall of the can body. A gist of a can container communicating with the abutting part is characterized in that a score capable of tearing is provided in the drop part at a required interval in the circumferential direction.

［実施例］ １は金属製缶胴で、この缶胴１の上端開口周縁にドー
ム状の金属蓋２の周縁が巻締められる。上記巻締めによ
り缶胴１の内壁に沿って当接垂下した垂直蓋板部分３の
下端に、上記ドームの裾まわりが、弧状の落込み部４を
介して連なり、該落込み部４の下面が上記垂直蓋板部分
３と缶胴内壁との当接部に連通する缶容器において、上
記落込み部４にスコア５を円周方向に所要間隔毎に設け
たものである。[Example] 1 is a metal can body, and a dome-shaped metal lid 2 is wound around the periphery of the upper end opening of the can body 1. The bottom edge of the vertical lid plate portion 3 that abuts and hangs along the inner wall of the can body 1 by the above-mentioned winding, and the hem circumference of the dome is connected via an arc-shaped drop portion 4, and the lower surface of the drop portion 4 In the can container that communicates with the contact portion between the vertical lid plate portion 3 and the inner wall of the can body, scores 5 are provided in the drop portion 4 in the circumferential direction at predetermined intervals.

上記スコア５は、本例では裾部４の表面側に設けてい
るが、裏面側でもよい。The score 5 is provided on the front surface side of the hem portion 4 in this example, but may be on the back surface side.

［作用］ 圧力缶容器の内圧力が異常に高くなったとき、落込み
部４の下面、つまり、巻締め部のきわから垂直蓋板部分
３と缶胴内壁との当接部に侵入し、落込み部４を変形さ
せ、この変形により落込み部４に設けたスコア６を裂開
し、裂開したスコア５から圧を解放させるものである。[Operation] When the internal pressure of the pressure can container becomes abnormally high, the pressure can container penetrates the lower surface of the drop portion 4, that is, the contact portion between the vertical lid plate portion 3 and the inner wall of the can body from the crease of the winding tightening portion, The drop portion 4 is deformed, the score 6 provided on the drop portion 4 is cleaved by this deformation, and pressure is released from the cleaved score 5.

［発明の効果］ 上述のように本発明によれば、缶胴への蓋の巻締めに
よって自ずと缶胴の内壁にそって当接垂下した垂直蓋板
部分の下端にドームの裾まわりが落込み部を介し連なっ
ていることと、該落込み部の下面が垂直蓋板部分と缶胴
内壁との当接部に連通していることに着目し、上記落込
み部にスコアを設けたので、上記落込み部が変形し始め
た時点、換言すれば、巻締め部に未だ波及しない巻締め
のきわでスコアを破壊させ、速やかに危険性を解除させ
ることを可能としたもので、従来の巻締め部の頂部にス
コアを設けた圧力缶容器にては望み得ない安全な圧力解
放作用を果たし得るものである。[Effect of the Invention] As described above, according to the present invention, the hem circumference of the dome is dropped at the lower end of the vertical lid plate portion that naturally abuts along the inner wall of the can body when the lid is wound around the can body. Paying attention to the fact that the lower portion of the drop portion communicates with the contact portion between the vertical lid plate portion and the inner wall of the can body, since a score is provided in the drop portion, At the time when the recessed part starts to deform, in other words, the score is destroyed by the winding tightening that has not yet reached the winding tightening part, and it is possible to quickly release the danger. A pressure can container having a score at the top of the tightening portion can achieve a safe pressure releasing action which cannot be expected.

併せて巻締め部の頂部にスコアがないので、巻締め部
の脆弱化要因を解消することができる。At the same time, since there is no score on the top of the winding fastening portion, it is possible to eliminate the weakening factor of the winding fastening portion.

【図面の簡単な説明】[Brief description of drawings]

第１図は圧力缶容器の正面図、第２図は同上平面図、第
３図は同上要部の拡大断面図、第４図は従来例の圧力缶
容器の一部の断面図、第５図は同上圧力解放状態を示す
断面図である。 １……缶胴,2……金属蓋,3……垂直蓋板部分,4……落込
み部,5……スコア。FIG. 1 is a front view of a pressure can container, FIG. 2 is a plan view of the same as above, FIG. 3 is an enlarged cross-sectional view of an essential part of the same, and FIG. 4 is a partial cross-sectional view of a conventional pressure can container, The figure is a cross-sectional view showing a pressure released state. 1 …… can barrel, 2 …… metal lid, 3 …… vertical lid plate part, 4 …… drop part, 5 …… score.