JP2007022538A

JP2007022538A - Glass bottle

Info

Publication number: JP2007022538A
Application number: JP2005202468A
Authority: JP
Inventors: Shinji Saito; 伸二斉藤
Original assignee: Toyo Glass Co Ltd
Current assignee: Toyo Glass Co Ltd
Priority date: 2005-07-12
Filing date: 2005-07-12
Publication date: 2007-02-01
Anticipated expiration: 2025-07-12
Also published as: JP4180586B2

Abstract

【課題】型開きの際に、ネジ部分のガラスと型との干渉量を小さくすることで、「びり」の発生する確率を低くする。
【解決手段】ガラスびん口部の合目部分のやせネジの断面形状を、一般部分のネジの断面形状ａと、該形状ａを所定量引き込んだ形状ｂの間の両山裾に接線ｃを形成し、接線ｃと前記形状ａとの接点をｐ、前記形状ｂとの接点をｑとしたときに、接点ｑ、ｑの間の形状が前記形状ｂ、接点ｐとｑの間の形状が前記接線ｃ、接点ｐ、ｐの両側の形状が前記形状ａとなるように形成することで、型開きの際のネジ部分のガラスと型との干渉量を小さくし、「びり」の発生を抑制できる。
【選択図】図５PROBLEM TO BE SOLVED: To reduce the probability of occurrence of "chatter" by reducing the amount of interference between a screw portion glass and the mold when the mold is opened.
SOLUTION: The cross-sectional shape of a thin screw at a joint portion of a glass bottle mouth portion is formed by forming a tangent line c at both mountain hems between a cross-sectional shape a of a general portion screw and a shape b in which the shape a is drawn by a predetermined amount. When the contact point between the tangent line c and the shape a is p and the contact point with the shape b is q, the shape between the contact points q and q is the shape b, and the shape between the contact points p and q is the above-described shape. By forming the shape of both sides of the tangent c, contact p, and p to be the shape a, the amount of interference between the glass of the screw portion and the mold at the time of mold opening is reduced, and the occurrence of “chatter” is suppressed. it can.
[Selection] Figure 5

Description

本発明は、口部にキャップを螺合するためのネジを有するガラスびんに関する。 The present invention relates to a glass bottle having a screw for screwing a cap into a mouth portion.

図１に示すように、ガラスびん１の口部のネジ２は、成形型の合目ｅの付近において、その他の部分よりも小さく形成されている。この小さく形成されている部分を「やせネジ」という。成形型は概略半円形の２つの割型を合わせることによって形成されるが、その割型の合わせ目が「合目」である。合目においては、ガラスがわずかの隙間からはみ出して、小さな突条が形成されるので、その部分のネジを若干小さく形成し、キャップのネジが損傷するのを防いでいる。 As shown in FIG. 1, the screw 2 at the mouth of the glass bottle 1 is formed smaller than other portions in the vicinity of the joint e of the mold. This small portion is referred to as a “skin screw”. The mold is formed by combining two substantially semicircular split molds, and the joint of the split molds is a “joint”. At the seam, the glass protrudes from a slight gap and a small protrusion is formed. Therefore, the screw at that portion is formed slightly small to prevent the screw of the cap from being damaged.

図２は、一般部分のネジ２とやせネジ３の大きさ及び形状を比較したものである。成形型のネジ部分は、当該部分をドリルで切削して形成する。やせネジ部分は、型に対してドリルの刃を浅く入れて形成する。したがって、やせネジの基本形状は、一般部分のネジを所定量引き込んだ形状ｂと等しくなっている。しかし、そのままだとやせネジの裾部分が尖った形になり、その部分に欠点が生じやすくなるので、裾部分が曲線ｄとなるように型を２次加工している。 FIG. 2 is a comparison of the size and shape of the general screw 2 and the thin screw 3. The screw portion of the mold is formed by cutting the portion with a drill. The thin screw portion is formed by inserting a drill blade shallowly into the mold. Therefore, the basic shape of the thin screw is equal to the shape b in which the screw of the general part is pulled in a predetermined amount. However, if it is left as it is, the hem portion of the thin screw has a sharp shape, and defects are likely to occur in that portion, so the mold is secondarily processed so that the skirt portion becomes a curve d.

成形型は、ガラスびん成形後に両側に開いて製品を脱型する。図１において、ガラスびんの口部を成形する口型は、合目から矢印方向に左右に開く。その際、ネジ２が水平であれば問題ないのであるが、ネジは傾斜しているものであるため、ネジと型とが干渉して、いわゆる「無理抜き」の状態となる。図３は、合目部分をやせネジとせず、一般部分と同じネジにした場合の、型開きの様子を表している。型開きすると、ネジ部分のガラスは型に対して、相対的に、矢印Ｂ方向に傾斜して離れていくことになる。そしてネジ部分のガラスと型が干渉する干渉部Ａが生じる。干渉部における干渉量が大きいと、その部分に「びり」と呼ばれる傷が生じ、ガラスの強度が著しく低下する。 The mold is opened on both sides after the glass bottle is molded to remove the product. In FIG. 1, the mouth mold for forming the mouth portion of the glass bottle opens left and right in the direction of the arrow from the joint. At that time, if the screw 2 is horizontal, there is no problem, but since the screw is inclined, the screw and the mold interfere with each other, resulting in a so-called “unreasonable” state. FIG. 3 shows a state of mold opening when the joint portion is not a thin screw but the same screw as a general portion. When the mold is opened, the glass of the screw portion is inclined with respect to the mold in the direction of arrow B and is separated. And the interference part A where the glass of a screw part and a type | mold interfere arises. When the amount of interference at the interference portion is large, scratches called “chatter” occur at that portion, and the strength of the glass is significantly reduced.

従来、合目部分をやせネジとすることは、型開きにおける干渉量を少なくする効果もあると信じられていた。しかし、発明者らは、図２に示す一般部分のネジ２と従来のやせネジ３について、型開きの際の干渉量を計算した。図３は一般部分のネジ、図４はやせネジの場合である。驚いたことに、一般部分のネジとやせネジでは干渉量が０．０７５ｍｍで等しい値であった。すなわち、従来のやせネジは干渉量を小さくする効果は全くなかったのである。 Conventionally, it has been believed that using a thin screw at the joint portion has an effect of reducing the amount of interference in mold opening. However, the inventors calculated the amount of interference at the time of mold opening for the general screw 2 and the conventional thin screw 3 shown in FIG. FIG. 3 shows the case of a general screw, and FIG. 4 shows the case of a thin screw. Surprisingly, the amount of interference was 0.075 mm, which was the same value for the general screw and the thin screw. That is, the conventional skin screw has no effect of reducing the amount of interference.

従来、ガラスびんのネジの合目には、ある程度の確率で「びり」が発生し、それは避けられないものと思われていた。本発明は、型開きの際に、ネジ部分のガラスと型との干渉量を小さくすることで、「びり」の発生する確率を低くすることを課題としてなされたものである。 Conventionally, it has been thought that a “chatter” occurs at a certain probability at the joint of the screw of the glass bottle, which is unavoidable. An object of the present invention is to reduce the probability of occurrence of “chatter” by reducing the amount of interference between the screw portion glass and the mold when the mold is opened.

本発明は、ガラスびん口部の合目部分のやせネジの断面形状を、一般部分のネジの断面形状ａと、該形状ａを所定量引き込んだ形状ｂの間の両山裾に接線ｃを形成し、接線ｃと前記形状ａとの接点をｐ、前記形状ｂとの接点をｑとしたときに、接点ｑ、ｑの間の形状が前記形状ｂ、接点ｐとｑの間の形状が前記接線ｃ、接点ｐ、ｐの両側の形状が前記形状ａとなるように形成したことを特徴とするガラスびんである。 In the present invention, the cross-sectional shape of the thin screw at the seam portion of the glass bottle mouth portion is formed by forming a tangent line c at both mountain hems between the cross-sectional shape a of the screw of the general portion and the shape b in which the shape a is drawn by a predetermined amount When the contact point between the tangent line c and the shape a is p and the contact point with the shape b is q, the shape between the contact points q and q is the shape b, and the shape between the contact points p and q is the above-described shape. The glass bottle is characterized in that the shape on both sides of the tangential line c and the contact points p and p is the shape a.

図５は実施例のガラスびんのやせネジ３の形状を示している。同図において、ａは一般部分のネジ形状（断面形状）で、ネジ高さは１．３ｍｍである。ｂはネジ形状ａを０．３ｍｍ水平に引き込んでネジ高さ１．０ｍｍとした形状である。形状ａとｂの間の上下両山裾の間に２本の接線ｃを引き、各接線ｃと形状ａとの接点をｐ、形状ｂとの接点をｑとする。やせネジ３の断面形状は、２つの接点ｑの間を形状ｂとし、接点ｐと接点ｑの間を接線ｃとし、２つの接点ｐの両側を形状ａとし、これらの形状を合成した形状（実線で示す形状）となっている。 FIG. 5 shows the shape of the thin screw 3 of the glass bottle of the embodiment. In the figure, a is a screw shape (cross-sectional shape) of a general part, and the screw height is 1.3 mm. b is a shape in which the screw height a is pulled 0.3 mm horizontally to a screw height of 1.0 mm. Two tangent lines c are drawn between the upper and lower mountain hems between the shapes a and b, and the contact point between each tangent line c and the shape a is p, and the contact point with the shape b is q. The cross-sectional shape of the thin screw 3 is a shape b between the two contacts q, a tangent line c between the contacts p and q, and a shape a on both sides of the two contacts p. (Shape shown by a solid line).

図６は、上記実施例のやせネジの型開きの様子を表している。この場合、ネジ部分のガラスと型の干渉量は０．０３５ｍｍとなり、干渉量は従来の半分以下となっている。したがって、ネジの合目部分のびりの発生を著しく低減することができる。 FIG. 6 shows how the thin screw of the above embodiment is opened. In this case, the amount of interference between the screw portion glass and the mold is 0.035 mm, and the amount of interference is less than half of the conventional amount. Therefore, the occurrence of chatter at the joint portion of the screw can be remarkably reduced.

ガラスびんの略正面図である。It is a schematic front view of a glass bottle. 従来のやせネジの説明図である。It is explanatory drawing of the conventional skin screw. 合目を一般部分のネジとした場合の型開きの説明図である。It is explanatory drawing of the mold opening at the time of using a joint as a screw of a general part. 合目を従来のやせネジとした場合の型開きの説明図である。It is explanatory drawing of the mold opening at the time of making a joint into the conventional thin screw. 実施例のガラスびんのやせネジの説明図である。It is explanatory drawing of the thin screw of the glass bottle of an Example. 実施例のガラスびんの型開きの説明図である。It is explanatory drawing of the mold opening of the glass bottle of an Example.

Explanation of symbols

１ガラスびん
２ネジ
３やせネジ 1 glass bottle 2 screw 3 thin screw

Claims

The cross-sectional shape of the thin screw at the joint of the glass bottle mouth
A tangent (c) is formed at both mountain hems between the cross-sectional shape (a) of the screw of the general portion and the shape (b) in which the shape (a) is pulled in a predetermined amount, and the tangent (c) and the shape (a) (P), and the contact point with the shape (b) is (q), the shape between the contact points (q) and (q) is the shape (b), the contact points (p) and ( The glass bottle is formed so that the shape between q) is the tangent (c), and the shapes on both sides of the contacts (p) and (p) are the shape (a).