JP2006232406A - Bottle can and bottle can with cap - Google Patents

Bottle can and bottle can with cap Download PDF

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JP2006232406A
JP2006232406A JP2006156331A JP2006156331A JP2006232406A JP 2006232406 A JP2006232406 A JP 2006232406A JP 2006156331 A JP2006156331 A JP 2006156331A JP 2006156331 A JP2006156331 A JP 2006156331A JP 2006232406 A JP2006232406 A JP 2006232406A
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screw
cap
bottle
axis
introduction
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JP4495113B2 (en
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Tatsuya Hanabusa
達也 花房
Ryuichi Ito
隆一 伊藤
Naoki Tasaka
直樹 田坂
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Altemira Can Co Ltd
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Universal Can Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bottle can capable of resealing a can excellently. <P>SOLUTION: The thread introducing and leaving portion 90 is provided between the thread starting portion of a thread portion and the curl portion 5 of a mouthpiece through a concave portion 8, the thread introducing and leaving portion 90 is made to project outward from a line 93 for connecting a first intersection point 91 with a second intersection point 92 and the maximum projecting height L substantially equal to or lower than the concave portion 8 is set in a predetermined range. The first intersection point 91 is at a position in which a line H orthogonal to a can axis is made to pass through the end in the outer peripheral wall 5b of the curl portion and to intersect the surface of the mouthpiece section, and the second intersection point 92 is at a position in which a line O parallel to the can axis is made to intersect a first tangent line 95 for passing through an inflection point X and a second tangent line 96 for passing through an inflection point Y. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、ボトル缶の口金にキャップを被着して口金を密閉するためのボトル缶と、キャップが被着されたキャップ付きボトル缶とに関する。   The present invention relates to a bottle can for sealing a cap by attaching a cap to the cap of the bottle can, and a bottle can with a cap to which the cap is attached.

一般に、飲料用の缶として広く使われているボトル缶は、アルミニウム製やその合金製の金属板を絞り加工（Ｄｒａｗｉｎｇ）と、次いで行われるしごき加工（Ｉｒｏｎｉｎｇ）とによって形成され、いわゆるＤＩ缶と呼ばれている。   In general, a bottle can widely used as a beverage can is formed by drawing a metal plate made of aluminum or an alloy thereof and then performing an ironing process (Ironing). being called.

このようなボトル缶は、従来、有底筒状に形成された後、図５に示すように、ボトル缶１の開口部がネック成形加工されることで縮径されて口金部２が形成され、次いでその口金部２にねじ成形加工されることでねじ部（雄ねじ）３及び．テンパーエビデンス部４が形成されると、口金部２の開口端を内側から外側に折り返すカール成形加工によってカール部５が形成される。カール部５は、口金部２に連設される内周壁５ａと、その内周壁５ａの外側に設けられる外周壁５ｂと、両者５ａ，５ｂを連結する接続部５ｃとを有している。   Such a bottle can is conventionally formed into a bottomed cylindrical shape, and then, as shown in FIG. 5, the opening of the bottle can 1 is neck-formed to reduce the diameter to form the base portion 2. Then, the cap part 2 is thread-molded so that screw parts (male threads) 3 and. When the temper evidence part 4 is formed, the curled part 5 is formed by curl forming that turns the opening end of the base part 2 from the inside to the outside. The curled part 5 has an inner peripheral wall 5a provided continuously to the base part 2, an outer peripheral wall 5b provided on the outer side of the inner peripheral wall 5a, and a connecting part 5c for connecting both 5a and 5b.

このように形成されたボトル缶１は、その後、内容物が充填されると、ボトル缶１の口金部２に図６に示すようにキャップ材６が被着され、キャップ付きボトル缶とされる。   When the contents of the bottle can 1 thus formed are filled, the cap material 6 is attached to the base 2 of the bottle can 1 as shown in FIG. .

つまり、図７に示すように、筒状のプレッシャーブロック７１と、このプレッシャーブロック７２の中央に軸方向に移動可能に設けられたプレッシャーブロックインサート７２と、ＲＯローラ７３、ＰＰローラ７４とを備えたキャッピング装置７を用い、図８（ａ）に示すように、ボトル缶１の口金部２に被せられたキャップ材６の天面部６１をプレッシャーブロックインサート７２が缶底方向に押圧して押さえる。次いで、図８（ｂ）に示すように、プレッシャーブロック７１が天面部６１の外周側を缶底方向に押圧しながら所望の深さ及び径方向に絞り加工することで、キャップ材６の肩部に段差部６２を形成し（段差部形成工程）、さらにその状態でＲＯローラ７３が口金部２のねじ部３に沿って回転することで、キャップ材６の周囲に雌ねじを形成すると共に、ＰＰローラ７４がテンパーエビデンス部４に沿い転動することでキャップ材の開口端側のフレアー６６が巻き締められ（巻締め工程）、これによってキャップ材６が図６のように口金部２に被着され、キャップ材６内に装着されているライナー６７が口金部２のカール部５と密に接することで、内容物が漏れないような密封性が得られるようになっている。なお、ここではボトル缶１に装着前のものを「キャップ材６」と呼び、装着後のものを「キャップ６」と呼ぶ。ここで、図８において、符号７５はプレッシャーブロックインサート７２を缶底方向に付勢させるスプリングである。
このボトル缶及びキャップ間の密封性に関連する先行技術文献情報としては、次のものがある。
特開２００１−１０６２７号公報 That is, as shown in FIG. 7, a cylindrical pressure block 71, a pressure block insert 72 provided in the center of the pressure block 72 so as to be movable in the axial direction, an RO roller 73, and a PP roller 74 were provided. Using the capping device 7, as shown in FIG. 8A, the pressure block insert 72 presses and holds the top surface portion 61 of the cap material 6 covered on the cap portion 2 of the bottle can 1 in the direction of the bottom of the can. Next, as shown in FIG. 8 (b), the pressure block 71 is drawn in the desired depth and radial direction while pressing the outer peripheral side of the top surface portion 61 in the direction of the bottom of the can. In this state, the RO roller 73 rotates along the screw part 3 of the base part 2 to form a female screw around the cap material 6 and PP. As the roller 74 rolls along the temper evidence part 4, the flare 66 on the opening end side of the cap material is tightened (clamping process), whereby the cap material 6 is attached to the base part 2 as shown in FIG. 6. The liner 67 mounted in the cap member 6 is in close contact with the curled portion 5 of the base portion 2, so that a sealing property that prevents the contents from leaking is obtained. Here, the one before being attached to the bottle can 1 is referred to as “cap material 6”, and the one after being attached is referred to as “cap 6”. Here, in FIG. 8, reference numeral 75 denotes a spring that urges the pressure block insert 72 toward the bottom of the can.
Prior art document information related to the sealing between the bottle can and the cap includes the following.
JP 2001-10627 A

このようなボトル缶１は、被着されているキャップ６を一旦開栓しても、再び閉じる（リシールという）ことができ、その際、キャップ６の雌ねじをねじ部３のねじ始まり位置３１から螺合させることで、内容物が漏れることのないようにリシールすることができる。   The bottle can 1 can be closed again (called reseal) once the cap 6 that has been attached is opened, and at that time, the female screw of the cap 6 is moved from the screw start position 31 of the screw portion 3. By screwing, it can be resealed so that the contents do not leak.

ところで、従来のボトル缶１は、図６に示すように、ねじ部３のねじ始まり位置３１に対しキャップ６を着脱させるためのねじ導入出部９０が図９のように形成されている。図９は図６にＡ−Ａ線に相当する断面図であって、ねじ部３及びカール部５間に設けられたねじ導入出部９０周辺を示している。
図９に示すように、ねじ部３及びカール部５の間には凹部８を介しねじ導入出部９０が設けられているが、ねじ導入出部９０が外方に張り出しているので、キャップ６を閉栓するとき、キャップ６がそのねじ導入出部９０に引掛かり、キャップ６を良好にリシールすることができず、その分だけ強いトルクが必要となる問題があった。 Incidentally, as shown in FIG. 6, the conventional bottle can 1 is formed with a screw introduction / extraction portion 90 for attaching and detaching the cap 6 to the screw start position 31 of the screw portion 3 as shown in FIG. 9. FIG. 9 is a cross-sectional view corresponding to the line AA in FIG. 6 and shows the periphery of the screw introduction / extraction part 90 provided between the screw part 3 and the curl part 5.
As shown in FIG. 9, a screw introduction / extraction portion 90 is provided between the screw portion 3 and the curl portion 5 via a recess 8. However, since the screw introduction / extraction portion 90 projects outward, the cap 6 When the cap is closed, the cap 6 is caught by the screw introduction / extraction portion 90, and the cap 6 cannot be resealed well, and there is a problem that a stronger torque is required.

この発明は、このような事情を考慮してなされたもので、その目的は、キャップのリシールを良好に行うことができるボトル缶及びキャップ付きボトル缶を提供することにある。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a bottle can and a bottle can with a cap that can perform resealing of a cap satisfactorily.

前記目的を達成するために、この発明は以下の手段を提案している。
請求項１に係る発明は、口金部の周囲に缶底方向に向かいねじ部を設けると共に、該口金部の開口端にカール部を形成し、かつ前記ねじ部及びカール部間に凹み部を介してねじ導入出部を設けたボトル缶において、前記ねじ導入出部は、口金部におけるねじ部のねじ始まり位置から、該ねじ部の巻き方向と反対方向に４５°〜９０°の範囲内にあって、かつ口金部における第１交点と第２交点とを結ぶ線上から外方に隔てた最も長い距離を高さＬとしたとき、０≦Ｌ≦０．３ｍｍの範囲に形成され、前記第１交点は、缶軸と直交する線が、カール部の外周壁における最も缶底側の先端を通り、かつ口金部の表面と交差する位置であり、前記第２交点は、缶軸と平行な線が、前記ねじ始まり位置のねじ山と前記凹み部とを結ぶ変曲点を通る第１接線と、前記凹み部及びねじ導入出部間の変曲点を通る第２接線と交差する位置であることを特徴とする。 In order to achieve the above object, the present invention proposes the following means.
According to the first aspect of the present invention, a screw portion is provided around the base portion toward the bottom of the can, a curled portion is formed at the opening end of the base portion, and a recess portion is interposed between the screw portion and the curled portion. In the bottle can provided with the screw introduction / extraction part, the screw introduction / extraction part is within a range of 45 ° to 90 ° in the direction opposite to the winding direction of the screw part from the screw start position of the screw part in the base part. And when the height L is the longest distance outwardly from the line connecting the first intersection and the second intersection in the base, the first portion is formed in the range of 0 ≦ L ≦ 0.3 mm. The intersection point is a position where a line orthogonal to the can axis passes through the tip of the outermost wall of the curl portion on the most bottom side and intersects the surface of the base portion, and the second intersection point is a line parallel to the can axis. Is a first connection passing through an inflection point connecting the thread at the screw start position and the recess. It is a position which cross | intersects the 2nd tangent which passes along the inflexion point between a line and the said dent part and a screw introduction / exit part.

この発明に係るボトル缶によれば、ねじ導入出部の最高高さＬが、０≦Ｌ≦０．３ｍｍの範囲に形成されているので、ねじ導入出部の高さがねじ部のねじ始まり位置に存在する凹部より高くなることがなくなり、そのため、一度開栓したキャップを閉じるとき、キャップが引掛かることがなくなると共に、リシール時のトルクも小さくなるので、キャップを良好にリシールすることができる。   According to the bottle can of the present invention, since the maximum height L of the screw introduction / extraction part is formed in the range of 0 ≦ L ≦ 0.3 mm, the height of the screw introduction / extraction part is the screw start of the screw part. Therefore, when the cap that has been opened once is closed, the cap is not caught and the torque at the time of resealing is reduced, so that the cap can be resealed satisfactorily. .

請求項２に係る発明は、請求項１記載のボトル缶において、前記ねじ導入出部は、前記第２接線と、缶軸と平行な直線とがなす角度をθとしたとき、前記第２の接線が前記缶軸と平行な直線に対して、缶軸から離間する方向に−２０°≦θ≦−５°となるように形成されていることを特徴とする。
この発明に係るボトル缶によれば、ねじ導入出部は、前記θが−２０°≦θ≦−５°の範囲に形成されるので、凹み部と略同等かそれより低くすることができ、キャップをねじ部に容易に螺合させることができ、良好なリシールを的確に行うことができる。 According to a second aspect of the present invention, in the bottle can according to the first aspect, the screw introducing / extracting portion is configured such that the second tangent and an angle formed by a straight line parallel to the can axis is θ. The tangent is formed so as to satisfy −20 ° ≦ θ ≦ −5 ° in a direction away from the can axis with respect to a straight line parallel to the can axis.
According to the bottle can according to the present invention, the screw introducing / extracting portion is formed in the range of −20 ° ≦ θ ≦ −5 ° so that the θ can be substantially equal to or lower than the recessed portion, The cap can be easily screwed into the threaded portion, and a good reseal can be performed accurately.

請求項３に係る発明は、請求項１又は２記載のボトル缶の口金部にキャップを被着してなることを特徴とする。
この発明に係るキャップ付きボトル缶によれば、キャップをスムースに閉栓でき、キャップのリシールを良好に行える。 The invention according to claim 3 is characterized in that a cap is attached to the cap portion of the bottle can according to claim 1 or 2.
According to the bottle can with a cap according to the present invention, the cap can be smoothly closed, and the cap can be resealed satisfactorily.

以上説明したように、請求項１に係る発明によれば、開栓したキャップをボトル缶に閉じるとき、キャップが引掛かることがなく、リシールトルクも小さくなるように構成したので、キャップを良好にリシールすることができる効果が得られる。   As described above, according to the first aspect of the present invention, when the opened cap is closed to the bottle can, the cap is not caught and the reseal torque is reduced. The effect of resealing is obtained.

請求項２に係る発明によれば、ねじ導入出部の角度θが凹み部より凹ますことができるように構成したので、キャップをねじ部に容易に螺合させることができ、良好なリシールを的確に行うことができる効果が得られる。   According to the second aspect of the invention, since the angle θ of the screw introduction / extraction part can be recessed from the recess part, the cap can be easily screwed into the screw part, and a good reseal can be achieved. The effect which can be performed exactly is acquired.

請求項３に係る発明によれば、キャップのリシールを良好に行えるので、リシール特性に優れたキャップ付きボトル缶を提供できる効果が得られる。   According to the invention which concerns on Claim 3, since the reseal of a cap can be performed favorably, the effect which can provide the bottle can with a cap excellent in the reseal characteristic is acquired.

以下、図面を参照し、この発明の実施の形態について説明する。図１及び図３はこの発明の一実施の形態に係るボトル缶を示す図であって、図１はボトル缶口金部におけるねじ部及びカール部間に設けられたねじ導入出部周辺を示す説明図、図３は図１におけるカール部を示す拡大説明図である。
この実施形態のボトル缶は、前述した図５から図８に示すように、缶体の開口部側に縮径されて口金部２が形成され、その口金部２の周囲にねじ部（雄ねじ）３が形成されると共に、それより缶底側にテンパーエビデンス部４が形成され、更に口金部２の先端を内側から外側に折り返すことでカール部５が形成され、この口金部２にキャッピング装置７によってキャップ材６が被着されることでキャップ付きボトル缶１が構成される。カール部５は、図３に示すように、口金部２に連設されて開口端まで延在する内周壁５ａと、その内周壁５ａの外側に設けられる外周壁５ｂと、両者５ａ，５ｂを連結する接続部５ｃとを有し、外周壁５ｂが更にスロット加工されることで略平面状に形成される。この外周壁５ｂの先端は、内周壁５ａ側に折曲するフック５ｄが設けられている。 Embodiments of the present invention will be described below with reference to the drawings. 1 and 3 are views showing a bottle can according to an embodiment of the present invention, and FIG. 1 is an explanatory view showing a periphery of a screw introduction / extraction part provided between a screw part and a curl part in a bottle can base part. FIGS. 3 and 3 are enlarged explanatory views showing the curled portion in FIG.
As shown in FIGS. 5 to 8 described above, the bottle can of this embodiment is reduced in diameter to the opening side of the can body to form the base portion 2, and a screw portion (male screw) around the base portion 2. 3 is formed, a temper evidence part 4 is formed on the bottom side of the can, and a curl part 5 is formed by folding the tip end of the base part 2 from the inside to the outside. A capping device 7 is formed on the base part 2. By attaching the cap material 6 by the above, the bottle can 1 with the cap is configured. As shown in FIG. 3, the curled portion 5 includes an inner peripheral wall 5a that is connected to the base portion 2 and extends to the opening end, an outer peripheral wall 5b that is provided outside the inner peripheral wall 5a, and both 5a and 5b. The outer peripheral wall 5b is further slot processed to form a substantially flat shape. A hook 5d that bends toward the inner peripheral wall 5a is provided at the tip of the outer peripheral wall 5b.

そして、口金部２には、ねじ部３及びカール部５間にねじ導入出部９０が設けられている。ねじ導入出部９０は、図１に示すように、ねじ部３のねじ山３ａとカール部５間に凹み部８を介して設けられており、口金部２における第１交点９１と、第２交点９２とを結ぶ線９３から外方に突出しており、その突出した最も大きな高さＬが凹み部８と略同等、若しくはそれより低くなるよう所定の範囲に設定されている。   The base part 2 is provided with a screw introduction / extraction part 90 between the screw part 3 and the curl part 5. As shown in FIG. 1, the screw introduction / extraction part 90 is provided between the screw thread 3 a of the screw part 3 and the curl part 5 via the recess part 8, and the first intersection 91 in the base part 2 and the second It protrudes outward from a line 93 connecting the intersection 92, and the maximum height L of the protrusion is set to a predetermined range so as to be substantially equal to or lower than that of the recessed portion 8.

この場合、第１交点９１は、図３に示すように、缶軸と直交する線Ｈが、カール部５のフック５ｄにおける最も缶底側の先端９４を通り、かつ口金部２の外表面と交差する位置である。第２交点９２は、図１に示すように、変曲点Ｘを通る第１接線９５と、変曲点Ｙを通る第２接線９６と交差する位置である。変曲点Ｘは、図１に示すように、ねじ始まり位置３１のねじ山３ａの凸状円弧と、凹み部８の凹状円弧との接続部近傍の点であり、変曲点Ｙは、凹み部８の凹状円弧と、ねじ導入出部９０の凸状円弧との接続部近傍の点である。
これら変曲点Ｘ，Ｙは、次のように求められる。
すなわち、後述する測定器により得られた図２に示す缶体１の輪郭線ａをＣＡＤデータに変換し、このＣＡＤデータ画像において、缶軸方向に１０μｍ間隔で缶軸に対する垂直線ｂ１，ｂ２，・・・，ｂｎを算出する。これら垂直線のうち、缶軸方向に最も高い位置における垂直線ｂ１は、例えばカール部５の下端に設定される。そして、これら各垂直線ｂ１〜ｂｎと前記輪郭線ａとの交点ａ１〜ａｎに接する接線を各々算出し、これら各接線の延在する方向が缶軸に対して接近する，又は離間する方向に変化する境界の交点を変曲点とする。例えば図２において、ねじ導入出部９０の変曲点は、交点ａ６と交点ａ８とになる。すなわち、缶軸方向に最も高い位置における交点ａ１から交点ａ５における接線は、缶軸から離間する方向に延在しており、交点ａ６において、接線が缶軸に接近する方向に延在するように方向が変化している。また、交点ａ８における接線は、交点ａ６と同様な方向に延在しており、交点ａ９において、接線が缶軸から離間する方向に延在するように方向が変化している。これら変曲点，すなわち交点ａ６，ａ９のうち、変曲点Ｙは、前述したように凹み部８の凹状円弧と、ねじ導入出部９０の凸状円弧との接続部近傍の点であるので、交点ａ９となる。 In this case, as shown in FIG. 3, the first intersection 91 has a line H orthogonal to the can axis passing through the tip 94 on the most bottom side of the hook 5 d of the curled portion 5 and the outer surface of the base portion 2. It is a crossing position. As shown in FIG. 1, the second intersection 92 is a position that intersects the first tangent line 95 passing through the inflection point X and the second tangent line 96 passing through the inflection point Y. As shown in FIG. 1, the inflection point X is a point in the vicinity of the connecting portion between the convex arc of the screw thread 3a at the screw start position 31 and the concave arc of the concave portion 8, and the inflection point Y is a concave portion. This is a point in the vicinity of the connecting portion between the concave arc of the portion 8 and the convex arc of the screw introduction / extraction portion 90.
These inflection points X and Y are obtained as follows.
That is, the contour line a of the can body 1 shown in FIG. 2 obtained by a measuring instrument to be described later is converted into CAD data. In this CAD data image, vertical lines b1, b2, perpendicular to the can axis at intervals of 10 μm in the can axis direction. ..., bn is calculated. Among these vertical lines, the vertical line b1 at the highest position in the can axis direction is set, for example, at the lower end of the curled portion 5. Then, the tangent lines that contact the intersection points a1 to an of each of the vertical lines b1 to bn and the contour line a are respectively calculated, and the extending direction of each tangent line approaches or separates from the can axis. Let the inflection point be the intersection of the changing boundaries. For example, in FIG. 2, the inflection points of the screw introduction / extraction part 90 are the intersection point a6 and the intersection point a8. That is, the tangent line from the intersection point a1 to the intersection point a5 at the highest position in the can axis direction extends in a direction away from the can axis, and at the intersection point a6, the tangent line extends in a direction approaching the can axis. The direction is changing. Further, the tangent at the intersection point a8 extends in the same direction as the intersection point a6, and the direction changes so that the tangent line extends in a direction away from the can shaft at the intersection point a9. Of these inflection points, that is, the intersection points a6 and a9, the inflection point Y is a point in the vicinity of the connecting portion between the concave arc of the recess 8 and the convex arc of the screw introduction / extraction portion 90 as described above. , The intersection point a9.

このような、ねじ導入出部９０は、詳細に図示していないが、口金部２におけるねじ部３のねじ始まり位置３１から、その巻方向と反対方向に４５°戻った範囲、若しくは４５°〜９０°戻った範囲に設定されており、しかも前記線９３から若干高い寸法に形成されている。例えば、口金部２に設けられたねじ部３が１．７巻に構成された場合、ねじ導入出部９０の高さＬが第１交点９１と第２交点９２とを結ぶ線９３上で０．５〜０．７ｍｍの寸法に形成され、また２．２巻に構成された場合、０．１〜０．３ｍｍの寸法に形成されている。   Such a screw introduction / extraction part 90 is not shown in detail, but from the screw start position 31 of the screw part 3 in the base part 2 to a range returned by 45 ° in the direction opposite to the winding direction, or from 45 ° to The range is set back by 90 °, and is slightly higher than the line 93. For example, when the screw part 3 provided in the base part 2 is configured to have 1.7 turns, the height L of the screw introduction / extraction part 90 is 0 on the line 93 connecting the first intersection 91 and the second intersection 92. It is formed in a size of 0.5 to 0.7 mm, and when formed in 2.2 turns, it is formed in a size of 0.1 to 0.3 mm.

また、ねじ導入出部９０は、図１において、前記変曲点Ｙを通る第２接線９６と、缶軸と平行な直線Ｏとがなす角度θが所定の範囲となるように形成されている。すなわち、第２の接線９６が、缶軸と平行な直線Ｏに対して外方（缶軸から離間する方向）に−２０°≦θ≦−５°となるように形成されている。従って、ねじ導入出部９０は、缶体の断面に沿った方向に対して、前述した第２交点９２を通る缶軸に平行な直線の位置と略同等か、缶軸側に傾斜するように形成されている。前記角度θは例えば、ねじ部３の巻数が１．７巻の場合には０°〜１．１°、また２．２巻の場合には−１０°〜−１３°となっている。
なお、図１及び図３において、図５〜図９と同一部分には同一符号を付している。 Further, in FIG. 1, the screw introduction / extraction portion 90 is formed such that an angle θ formed by a second tangent line 96 passing through the inflection point Y and a straight line O parallel to the can axis is within a predetermined range. . That is, the second tangent line 96 is formed so as to satisfy −20 ° ≦ θ ≦ −5 ° outward (in a direction away from the can shaft) with respect to the straight line O parallel to the can shaft. Accordingly, the screw introduction / extraction portion 90 is substantially equal to the position of the straight line parallel to the can axis passing through the second intersection 92 described above or inclined toward the can axis side with respect to the direction along the cross section of the can body. Is formed. The angle θ is, for example, 0 ° to 1.1 ° when the number of turns of the screw portion 3 is 1.7, and −10 ° to −13 ° when the number of turns is 2.2.
1 and 3, the same parts as those in FIGS. 5 to 9 are denoted by the same reference numerals.

この実施形態のボトル缶１は、前記のように構成されるので、いま、口金部２にキャップ６が巻き締められたキャップ付きボトル缶から、利用者がキャップ６を開栓して飲んだ後、利用者がキャップをボトル缶１の口金部２にリシールするため、キャップ６をねじ部３に螺合させることでリシールすることとなる。   Since the bottle can 1 of this embodiment is configured as described above, after the user opens the cap 6 and drinks it from a cap can with the cap 6 wound around the base 2. The user reseals the cap by screwing the cap 6 onto the screw portion 3 in order to reseal the cap to the base portion 2 of the bottle can 1.

その際、口金部２のねじ部３及びカール部５間に凹み部８を介して形成されたねじ導入出部９０の高さＬが凹み部８と略同等かそれより低くなるように形成され、図９に示した従来のねじ導入出部９０より低くなっているので、ねじ導入出部９０側からキャップ６をねじ部３に螺着してリシールする際、キャップ６の雌ねじをねじ部３のねじ始まり位置３１に容易に導くことができる。これにより、リシール時には、キャップ６がねじ導入出部９０に引掛かることがなくなると共に、リシールトルクも小さくなるので、キャップ６を良好に閉めることができる。   At that time, the height L of the screw introduction / extraction portion 90 formed between the screw portion 3 and the curl portion 5 of the base portion 2 via the recess portion 8 is formed to be substantially equal to or lower than that of the recess portion 8. 9 is lower than the conventional screw introduction / extraction portion 90 shown in FIG. 9, when the cap 6 is screwed onto the screw portion 3 from the screw introduction / extraction portion 90 side and resealed, the female screw of the cap 6 is inserted into the screw portion 3. The screw start position 31 can be easily guided. Thereby, at the time of resealing, the cap 6 is not caught on the screw introducing / extracting portion 90 and the resealing torque is reduced, so that the cap 6 can be satisfactorily closed.

しかも、ねじ導入出部９０は、前記角度θが前述した所定の範囲となるように形成されているため、ねじ導入出部９０は、缶体の断面に沿った方向に対して、前述した第２交点９２を通る缶軸に平行な直線の位置と略同等か、缶軸側に傾斜するような構成を実現することができる。これにより、リシール時、キャップ６の導入のみならず、導出をも確実かつ良好に行うことができ、利用者の使い勝手が極めて良好となる。   In addition, since the screw introduction / extraction part 90 is formed so that the angle θ falls within the predetermined range described above, the screw introduction / extraction part 90 corresponds to the first direction described above with respect to the direction along the cross section of the can body. It is possible to realize a configuration that is substantially the same as the position of the straight line parallel to the can axis passing through the two intersections 92 or is inclined toward the can axis. Thereby, at the time of resealing, not only the introduction of the cap 6 but also the derivation can be performed reliably and satisfactorily, and the usability for the user is extremely good.

因みに、ねじ導入出部９０として、高さＬが０．１、０．２、０．３、０．４ｍｍの寸法にそれぞれ形成すると共に、それらを種々の角度θに形成した場合のリシールトルクの試験結果を図４に示す。なお、試験に際しては、コントレーサと称される測定器（ＣＤＨ−４００ ミツトヨ製）を用い、その接触子（先端半径：０．０２２ｍｍ、外形：３Φｍｍ、先端角度：１２°）を０．２ｍｍ／ｓの速度でねじ部のねじ始まり位置とカール部フック５ｄの先端９４との間で走査させることで、高さＬ寸法及び角度θを測定した。また、キャップのリシールトルクは、トルク計測器を使用した。   Incidentally, as the screw introduction / extraction part 90, the height L is 0.1, 0.2, 0.3, and 0.4 mm, respectively, and the reseal torque when they are formed at various angles θ. The test results are shown in FIG. In the test, a measuring instrument (CDH-400 made by Mitutoyo) called a tracer was used, and its contact (tip radius: 0.022 mm, external shape: 3Φ mm, tip angle: 12 °) was 0.2 mm / The height L dimension and the angle θ were measured by scanning between the screw start position of the thread portion and the tip 94 of the curled portion hook 5d at a speed of s. Moreover, the torque measuring device was used for the reseal torque of the cap.

図４において、リシールトルク欄中の「○」は、トルクが１９．６Ｎ・ｃｍ未満であって、低トルクでリシールしたことを意味し、「×」は前記数値以上の高トルクを要したことを意味している。
図４によれば、高さＬが０．４ｍｍのとき、角度θがいずれの場合でもリシールトルクが大きくなり、また図示していないものの、高さＬが０ｍｍのときに０．１ｍｍの場合と同様の結果となることから、０≦Ｌ≦０．３ｍｍにすればよいことが判る。一方、角度θが−２３°のように小さかったとき、また−３°や０°のように大きかったときには、いずれの高さＬの場合も大きなリシールトルクとなることから、−２０°≦θ≦−５°の範囲にすればよいことが判る。従って、図４から明らかなように、ねじ導入出部９０の高さＬとしては、０≦Ｌ≦０．３ｍｍの範囲であり、また角度θとしては、−２０°≦θ≦−５°の範囲、好ましくは−１３°〜−１０°であればよい。 In FIG. 4, “◯” in the reseal torque column means that the torque is less than 19.6 N · cm and reseal is performed at a low torque, and “×” indicates that a high torque greater than the above value is required. Means.
According to FIG. 4, when the height L is 0.4 mm, the reseal torque becomes large regardless of the angle θ, and although not shown, when the height L is 0 mm, Since similar results are obtained, it can be seen that 0 ≦ L ≦ 0.3 mm may be satisfied. On the other hand, when the angle θ is as small as −23 °, or as large as −3 ° or 0 °, the reseal torque becomes large at any height L, so −20 ° ≦ θ It can be seen that a range of ≦ −5 ° is sufficient. Therefore, as apparent from FIG. 4, the height L of the screw introduction / extraction portion 90 is in the range of 0 ≦ L ≦ 0.3 mm, and the angle θ is −20 ° ≦ θ ≦ −5 °. It may be in the range, preferably -13 ° to -10 °.

この発明の一実施の形態に係るボトル缶を示す図であって、ボトル缶の口金部におけるねじ部のねじ始まり位置からねじ部の巻方向と反対方向のねじ導入出側を断面した要部の説明図である。It is a figure which shows the bottle can which concerns on one embodiment of this invention, Comprising: Of the principal part which cut | disconnected the screw introduction / extraction side of the direction opposite to the winding direction of a screw part from the screw | thread start position of the screw part in the nozzle | cap | die part of a bottle can It is explanatory drawing. 変曲点の算出方法を説明するための説明図である。It is explanatory drawing for demonstrating the calculation method of an inflection point. 図１におけるカール部を示す拡大説明図である。FIG. 2 is an enlarged explanatory view showing a curled portion in FIG. 1. この発明によって得られたボトル缶の種々の試験結果を示す説明図である。It is explanatory drawing which shows the various test results of the bottle can obtained by this invention. ボトル缶の口金部に設けられたカール部を示す説明図である。It is explanatory drawing which shows the curl part provided in the nozzle | cap | die part of the bottle can. ボトル缶の口金部にキャップが被着された状態を示す説明図である。It is explanatory drawing which shows the state by which the cap was attached to the nozzle | cap | die part of a bottle can. ボトル缶の口金部にキャッピング装置によってキャップを被着するときの説明図である。It is explanatory drawing when a cap is attached to the nozzle | cap | die part of a bottle can with a capping apparatus. 同じくキャッピング装置がキャップを被着するときの図であって、（ａ）キャップ材をボトル缶に押さえ付けた状態を示す説明図、（ｂ）はキャップ材に段差部及び雌ねじを形成する説明図である。Similarly, it is a figure when a capping device attaches a cap, (a) Explanatory drawing which shows the state which pressed down the cap material to the bottle can, (b) Explanatory drawing which forms a level difference part and a female screw in a cap material. It is. 図６にＡ−Ａ線に相当する断面図であって、従来のボトル缶口金部におけるねじ部及びカール部間の導入出部周辺を示す説明図である。FIG. 6 is a cross-sectional view corresponding to the line AA, and is an explanatory view showing the periphery of the introduction / extraction part between the screw part and the curl part in the conventional bottle can cap part.

符号の説明Explanation of symbols

１ 缶体
２ 口金部
３ ねじ部
３１ ねじ部のねじ始まり位置
３ａ ねじ始まり位置のねじ山
５ カール部
８ 凹み部
９０ ねじ導入出部
９１ 第１交点
９２ 第２交点
９３ 第１交点と第２交点とを結ぶ線
９４ カール部の缶底方向の先端
９５ ねじ始まり位置のねじ山と凹み部間の変曲点を通る第１接線
９６ 凹部とねじ導入出部間の変曲点を通る第２接線
Ｘ ねじ始まり位置のねじ山と凹み部間の変曲点
Ｙ 凹み部と導入出部間の変曲点

DESCRIPTION OF SYMBOLS 1 Can body 2 Cap | tip part 3 Screw part 31 Screw start position 3a Screw thread 5 of the screw start position Curl part 8 Recessed part 90 Screw introduction / extraction part 91 First intersection 92 Second intersection 93 First intersection and second intersection 94 of the curl portion in the bottom direction of the bottom of the curl portion The first tangent line 96 passing through the inflection point between the thread at the screw start position and the recess portion The second tangent line passing through the inflection point between the recess portion and the screw introduction / extraction portion X Inflection point between the thread at the screw start position and the indentation Y Inflection point between the indentation and the lead-out part

Claims (3)

口金部の周囲に缶底方向に向かいねじ部を設けると共に、該口金部の開口端にカール部を形成し、かつ前記ねじ部及びカール部間に凹み部を介してねじ導入出部を設けたボトル缶において、
前記ねじ導入出部は、口金部におけるねじ部のねじ始まり位置から、該ねじ部の巻き方向と反対方向に４５°から９０°の範囲内にあって、かつ口金部における第１交点と、第２交点とを結ぶ線上から外方に突出した高さをＬとしたとき、０≦Ｌ≦０．３ｍｍの範囲に形成され、
前記第１交点は、缶軸と直交する線が、カール部の外周壁における最も缶底側の先端を通り、かつ口金部の表面と交差する位置であり、
前記第２交点は、前記ねじ始まり位置のねじ山と前記凹み部とを結ぶ変曲点を通る第１接線と、前記凹み部及びねじ導入出部間の変曲点を通る第２接線と交差する位置であることを特徴とするボトル缶。 A screw part is provided around the base part toward the bottom of the can, a curl part is formed at the opening end of the base part, and a screw introduction / extraction part is provided between the screw part and the curl part via a recessed part. In bottle cans,
The screw introduction / extraction part is within a range of 45 ° to 90 ° in the direction opposite to the winding direction of the screw part from the screw start position of the screw part in the base part, and the first intersection point in the base part, When the height protruding outward from the line connecting the two intersections is L, it is formed in the range of 0 ≦ L ≦ 0.3 mm,
The first intersection point is a position where a line perpendicular to the can axis passes through the tip on the most bottom side of the outer peripheral wall of the curled part and intersects the surface of the base part,
The second intersection point intersects with a first tangent passing through an inflection point connecting the thread at the screw start position and the recess, and a second tangent passing through an inflection point between the recess and the screw introduction / extraction part. A bottle can characterized by being a position to perform. 請求項１記載のボトル缶において、
前記ねじ導入出部は、前記第２接線と、缶軸と平行な直線とがなす角度をθとしたとき、前記第２の接線が、前記缶軸と平行な直線に対して缶軸から離間する方向に−２０°≦θ≦−５°となるように形成されていることを特徴とするボトル缶。 The bottle can according to claim 1,
When the angle between the second tangent and a straight line parallel to the can axis is θ, the second tangent is separated from the can axis with respect to the straight line parallel to the can axis. It is formed so that it may be set to -20 degrees <= theta <-5 degrees in the direction to do. 請求項１又は２記載のボトル缶の口金部にキャップを被着してなることを特徴とするキャップ付きボトル缶。

A bottle can with a cap, wherein the cap is attached to the mouthpiece of the bottle can according to claim 1 or 2.

JP2006156331A 2006-06-05 2006-06-05 Manufacturing method of bottle can and bottle can with cap Expired - Lifetime JP4495113B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2016041450A (en) * 2011-03-28 2016-03-31 ユニバーサル製缶株式会社 Method for manufacturing threaded bottle can

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JP2001010627A (en) * 1999-06-29 2001-01-16 Daiwa Can Co Ltd Threaded can

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大橋一郎，田村重喜，松政秀樹: "「ＤＡＫＡＲＡ」アルミボトル缶の開発", 包装技術, vol. 第３８巻第９号, JPN4005008401, September 2000 (2000-09-01), JP, pages 8 - 15, ISSN: 0001415219 *

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Publication number Priority date Publication date Assignee Title
JP2016041450A (en) * 2011-03-28 2016-03-31 ユニバーサル製缶株式会社 Method for manufacturing threaded bottle can
JP2017061346A (en) * 2011-03-28 2017-03-30 ユニバーサル製缶株式会社 Thread-cut bottle can

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