JP4281461B2 - Double container and method for forming double container - Google Patents

Double container and method for forming double container Download PDF

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JP4281461B2
JP4281461B2 JP2003289774A JP2003289774A JP4281461B2 JP 4281461 B2 JP4281461 B2 JP 4281461B2 JP 2003289774 A JP2003289774 A JP 2003289774A JP 2003289774 A JP2003289774 A JP 2003289774A JP 4281461 B2 JP4281461 B2 JP 4281461B2
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container
double container
double
rib
gap
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孝之 後藤
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Yoshino Kogyosho Co Ltd
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Description

本発明は、特に、外容体と内容体間に、断熱効果を持つ空隙を形成し、熱伝導を低く抑えて保温機能を有する二重容器及び二重容器の成形方法に関する。   In particular, the present invention relates to a double container having a heat insulating function by forming a space having a heat insulating effect between an outer container and a content body, and a method for forming the double container.

収納液の保温性機能、高温あるいは低温の収納液を収納した状態での容器を素手で掴持可能するために二重壁構造の容器の使用が考えられる。二重壁を有した例としてその目的は収納液の保温ではないが、特許文献１には容器本体に内部容器を収納した注出容器に関するものが記載されている。
実開平７−２２９５１号公報 The use of a double-walled container is conceivable in order to hold the container in a state in which the stored liquid has a heat retaining function and a high or low temperature stored liquid is stored with bare hands. As an example having a double wall, the purpose is not to keep the storage liquid warm, but Patent Document 1 describes a dispensing container in which an internal container is stored in a container body.
Japanese Utility Model Publication No. 7-22951

特許文献１に記載された注出容器のように、容器本体内に内部容器を収納する方法では、内部容体の容器本体への挿入、係止のため例えば、口筒部の口径を大きくする必要がある等の形状上の制約があり、挿入工程を必要とすること、また2つの容器の組み付けるための部位、部材あるいは組み付け工程が必要になる等の問題がある。   In the method of storing the inner container in the container body as in the dispensing container described in Patent Document 1, it is necessary to increase the diameter of the mouth tube portion, for example, in order to insert and lock the inner container into the container body. There is a problem such as that there is a restriction on the shape such as that there is a need for an insertion process and that a part, a member or an assembly process for assembling the two containers are required.

本発明は上記問題点に鑑みて案出したもので、断熱効果を有する二重容器及び二重容器の成形方法を提供する点にある。   The present invention has been devised in view of the above problems, and is to provide a double container having a heat insulating effect and a method for forming the double container.

先ず、本発明の請求項１に係る二重容器は、
瓶体状にブロー成形された、口筒部同志を係止した外容体と内容体とから構成される二重容器において、
前記外容体と内容体のいずれか一方に設けた空隙形成リブにより、肩部から胴部にかけて空隙を有する二重壁構造としたことを特徴とするものである。 First, the double container according to claim 1 of the present invention is
Is blown into a bottle-shaped, in the double container composed of an outer container body and the contents body locking the mouth tube portion each other,
The gap forming rib provided on one of the outer container body and the contents thereof, is characterized in that it has a double wall structure having an air gap toward the body portion from the shoulder.

請求項１記載により、容器の壁を通しての熱伝導を低く抑えた断熱機能を発揮せしめる。そして、例えば、暖かいお茶の場合は冷めにくく、冷たいお茶の場合は温かくなり難い保温効果を発揮させることができる。また、断熱効果により熱いお茶の入った本発明の容器を手で持っても熱くなく、逆に冷たいお茶の入った本発明の容器を手で持っても冷たくない容器にできる。
また、空隙形成リブにより機械的強度の優れた二重容器を製作できる。 According to the first aspect of the present invention, a heat insulating function that suppresses heat conduction through the wall of the container is exhibited. For example, it is possible to exert a heat retaining effect that is difficult to cool in the case of warm tea, and that is difficult to become warm in the case of cold tea. Further, due to the heat insulation effect, the container of the present invention containing hot tea is not hot even if it is held by hand, and conversely, the container of the present invention containing cold tea is not cold even if held by hand.
Moreover, the double container excellent in mechanical strength can be manufactured by the gap forming rib.

請求項２の発明は、請求項１記載の二重容器において、
空隙形成リブは、縦リブを周方向に複数設けて成るものである。 Invention of Claim 2 is the double container of Claim 1,
The air gap forming rib is formed by providing a plurality of vertical ribs in the circumferential direction.

請求項２の発明により、肩部から胴部にかけて縦リブで空隙を形成するため、機械的強度が強く、かつ請求項１と同様に断熱効果の高い容器にできる。   According to the second aspect of the present invention, since the gap is formed by the vertical rib from the shoulder portion to the trunk portion, the mechanical strength is high, and the container having the high heat insulating effect can be obtained as in the first aspect.

請求項３の発明は、請求項１記載の二重容器において、
空隙形成リブは、周リブを軸線方向に複数設けて成るものである。 The invention of claim 3 is the double container according to claim 1,
The air gap forming rib is formed by providing a plurality of peripheral ribs in the axial direction.

請求項３の発明により、肩部から胴部にかけて周リブが形成されるため、空隙は該周リブによって上下方向が遮断される形態となっているため熱の対流現象がない。従って、請求項１と同様に断熱効果の高い二重容器となる。   According to the invention of claim 3, since the peripheral rib is formed from the shoulder portion to the trunk portion, the gap is cut off in the vertical direction by the peripheral rib, so there is no heat convection phenomenon. Therefore, it becomes a double container with a high heat insulation effect similarly to Claim 1.

次に、本発明の請求項４に係る二重容器の成形方法は、
外容体と内容体とから構成される二重壁構造の二重容器の成形方法であって、口筒部同志を係止して内容体を形成するプリフォームを外容体に挿着組み付けし、瓶体状に成形された外容体を成形型としてプリフォームをブロー成形すると共に、外容体とプリフォームのいずれか一方の空隙形成リブにより肩部から胴部にかけて空隙を形成して成るものである。 Next, a method for forming a double container according to claim 4 of the present invention is as follows.
It is a method for forming a double container having a double wall structure composed of an outer body and a content body, and a preform that forms a content body by locking the mouth tube portions is inserted and assembled to the outer body body, The preform is blow-molded with the outer body molded in a bottle shape as a molding die, and a gap is formed from the shoulder to the trunk by a gap forming rib of either the outer body or the preform. .

請求項４記載の発明により、外容体を成形型としてプリフォームをブロー成形により、成形が容易である。また、成形後は空隙形成リブにより肩部から胴部にかけて空隙を確実に形成できる。そして、この空隙により容器は断熱効果の高い製品に成形できる。すなわち、容器の壁を通しての熱伝導を低く抑えた断熱機能を発揮せしめる。そして、例えば、暖かいお茶の場合は冷めにくく、冷たいお茶の場合は温かくなり難い保温効果を発揮させることができる。また、断熱効果により熱いお茶の入った本発明の容器を手で持っても熱くなく、逆に冷たいお茶の入った本発明の容器を手で持っても冷たくない容器にできる。   According to the fourth aspect of the present invention, the preform can be easily molded by blow molding using the outer container as a molding die. Further, after molding, the gap can be reliably formed from the shoulder portion to the trunk portion by the gap forming rib. And this container can shape | mold a container into a product with a high heat insulation effect. That is, the heat insulation function with low heat conduction through the wall of the container is exhibited. For example, it is possible to exert a heat retaining effect that is difficult to cool in the case of warm tea, and that is difficult to become warm in the case of cold tea. Further, due to the heat insulating effect, the container of the present invention containing hot tea is not hot even if it is held by hand, and conversely, the container of the present invention containing cold tea is not cold even if held by hand.

請求項５の発明は、請求項４記載の二重容器の成形方法において、
空隙形成リブは、プリフォームの外周面に、縦リブを周方向に複数設けて成るものである。 The invention of claim 5 is the method of forming a double container according to claim 4,
The air gap forming rib is formed by providing a plurality of vertical ribs in the circumferential direction on the outer peripheral surface of the preform.

請求項５の発明により、肩部から胴部にかけて縦リブが設けてあるため、機械的強度が強く、かつ請求項４と同様に断熱効果の高い容器にできる。   According to the fifth aspect of the present invention, since the vertical ribs are provided from the shoulder portion to the trunk portion, the mechanical strength is high, and a container having a high heat insulating effect can be obtained as in the fourth aspect.

請求項６の発明は、請求項４記載の二重容器の成形方法において、
空隙形成リブは、プリフォームの外周面に、周リブを軸線方向に複数設けて成るものである。 The invention of claim 6 is the method of forming a double container according to claim 4,
The air gap forming rib is formed by providing a plurality of peripheral ribs in the axial direction on the outer peripheral surface of the preform.

請求項６の発明により、肩部から胴部にかけて周リブが形成されるため、空気は周リブによって上下方向が遮断されるため、熱の対流現象がない。従って、請求項４と同様に断熱効果は高く、ロスが少ない。   According to the sixth aspect of the present invention, since the peripheral rib is formed from the shoulder portion to the trunk portion, air is blocked in the vertical direction by the peripheral rib, so that there is no heat convection phenomenon. Therefore, as in the fourth aspect, the heat insulation effect is high and the loss is small.

請求項７の発明は、請求項４記載の二重容器の成形方法において、
空隙形成リブは、外容体の内壁面に、縦リブを周方向に複数設けて成るものである。 The invention of claim 7 is the method of forming a double container according to claim 4,
The air gap forming rib is formed by providing a plurality of vertical ribs in the circumferential direction on the inner wall surface of the outer container.

請求項７の発明により、肩部から胴部にかけて縦リブが設けてあるため、機械的強度が強く、かつ請求項４と同様に断熱効果の高い容器にできる。
また、外容体２に対し、内容体４のプリフォームは肉薄の成形でもよいものである。 According to the seventh aspect of the present invention, since the vertical ribs are provided from the shoulder portion to the trunk portion, the mechanical strength is high and the container having a high heat insulating effect can be obtained as in the fourth aspect.
Further, the preform of the content body 4 may be thinly molded with respect to the outer body 2.

請求項８の発明は、請求項４記載の二重容器の成形方法において、
空隙成形リブは、外容体の内璧面に、周リブを軸線方向に複数設けて成るものである。 The invention of claim 8 is the method of forming a double container according to claim 4,
The gap forming rib is formed by providing a plurality of peripheral ribs in the axial direction on the inner wall surface of the outer container.

請求項８の発明により、肩部から胴部にかけて周リブが形成されるため、空気は周リブによって上下方向が遮断されるため、熱の対流現象がない。従って、請求項４と同様に断熱効果は高く、ロスが少ない。
また、外容体２に対し、内容体４のプリフォームは肉薄の成形でもよいものである。 According to the eighth aspect of the present invention, since the peripheral rib is formed from the shoulder portion to the trunk portion, the air is blocked in the vertical direction by the peripheral rib, so that there is no heat convection phenomenon. Therefore, as in the fourth aspect, the heat insulation effect is high and the loss is small.
Further, the preform of the content body 4 may be thinly molded with respect to the outer body 2.

本発明は以下の効果を奏する。
請求項１記載により、容器の壁を通しての熱伝導を低く抑えた断熱機能を発揮せしめる。そして、例えば、暖かいお茶の場合は冷めにくく、冷たいお茶の場合は温かくなり難い保温効果を発揮させることができる。また、断熱効果により熱いお茶の入った本発明の容器を手で持っても熱くなく、逆に冷たいお茶の入った本発明の容器を手で持っても冷たくない容器にできる。
また、空隙形成リブにより機械的強度の優れた二重容器を製作できる。 The present invention has the following effects.
According to the first aspect of the present invention, a heat insulating function that suppresses heat conduction through the wall of the container is exhibited. For example, it is possible to exert a heat retaining effect that is difficult to cool in the case of warm tea, and that is difficult to become warm in the case of cold tea. Further, due to the heat insulation effect, the container of the present invention containing hot tea is not hot even if it is held by hand, and conversely, the container of the present invention containing cold tea is not cold even if held by hand.
Moreover, the double container excellent in mechanical strength can be manufactured by the gap forming rib.

請求項２の発明により、肩部から胴部にかけて縦リブで空隙を形成するため、機械的強度が強く、かつ請求項１と同様に断熱効果の高い容器にできる。   According to the second aspect of the present invention, since the gap is formed by the vertical rib from the shoulder portion to the trunk portion, the mechanical strength is high, and the container having the high heat insulating effect can be obtained as in the first aspect.

請求項３の発明により、肩部から胴部にかけて周リブが形成されるため、空隙は該周リブによって上下方向が遮断される形態となっているため熱の対流現象がない。従って、請求項１と同様に断熱効果の高い二重容器となる。   According to the invention of claim 3, since the peripheral rib is formed from the shoulder portion to the trunk portion, the gap is cut off in the vertical direction by the peripheral rib, so there is no heat convection phenomenon. Therefore, it becomes a double container with a high heat insulation effect similarly to Claim 1.

請求項４記載の発明により、外容体を成形型としてプリフォームをブロー成形により、成形が容易である。また、成形後は空隙形成リブにより肩部から胴部にかけて空隙を確実に形成できる。そして、この空隙により容器は断熱効果の高い製品に成形できる。すなわち、容器の壁を通しての熱伝導を低く抑えた断熱機能を発揮せしめる。そして、例えば、暖かいお茶の場合は冷めにくく、冷たいお茶の場合は温かくなり難い保温効果を発揮させることができる。また、断熱効果により熱いお茶の入った本発明の容器を手で持っても熱くなく、逆に冷たいお茶の入った本発明の容器を手で持っても冷たくない容器にできる。   According to the fourth aspect of the present invention, the preform can be easily molded by blow molding using the outer container as a molding die. Further, after molding, the gap can be reliably formed from the shoulder portion to the trunk portion by the gap forming rib. And this container can shape | mold a container into a product with a high heat insulation effect. That is, the heat insulation function with low heat conduction through the wall of the container is exhibited. For example, it is possible to exert a heat retaining effect that is difficult to cool in the case of warm tea, and that is difficult to become warm in the case of cold tea. Further, due to the heat insulating effect, the container of the present invention containing hot tea is not hot even if it is held by hand, and conversely, the container of the present invention containing cold tea is not cold even if held by hand.

請求項５の発明により、肩部から胴部にかけて縦リブが設けてあるため、機械的強度が強く、かつ請求項４と同様に断熱効果の高い容器にできる。   According to the fifth aspect of the present invention, since the vertical ribs are provided from the shoulder portion to the trunk portion, the mechanical strength is high, and a container having a high heat insulating effect can be obtained as in the fourth aspect.

請求項６の発明により、肩部から胴部にかけて周リブが形成されるため、空気は周リブによって上下方向が遮断されるため、熱の対流現象がない。従って、請求項４と同様に断熱効果は高く、ロスが少ない。   According to the sixth aspect of the present invention, since the peripheral rib is formed from the shoulder portion to the trunk portion, air is blocked in the vertical direction by the peripheral rib, so that there is no heat convection phenomenon. Therefore, as in the fourth aspect, the heat insulation effect is high and the loss is small.

請求項７の発明により、肩部から胴部にかけて縦リブが設けてあるため、機械的強度が強く、かつ請求項４と同様に断熱効果の高い容器にできる。
また、外容体２に対し、内容体４のプリフォームは肉薄の成形でもよいものである。 According to the seventh aspect of the present invention, since the vertical ribs are provided from the shoulder portion to the trunk portion, the mechanical strength is high and the container having a high heat insulating effect can be obtained as in the fourth aspect.
Further, the preform of the content body 4 may be thinly molded with respect to the outer body 2.

請求項８の発明により、肩部から胴部にかけて周リブが形成されるため、空気は周リブによって上下方向が遮断されるため、熱の対流現象がない。従って、請求項４と同様に断熱効果は高く、ロスが少ない。
また、外容体２に対し、内容体４のプリフォームは肉薄の成形でもよいものである。 According to the eighth aspect of the present invention, since the peripheral rib is formed from the shoulder portion to the trunk portion, the air is blocked in the vertical direction by the peripheral rib, so that there is no heat convection phenomenon. Therefore, as in the fourth aspect, the heat insulation effect is high and the loss is small.
Further, the preform of the content body 4 may be thinly molded with respect to the outer body 2.

以下、本発明の実施の形態を図面を参照して説明する。本発明の二重容器の構造は図１，３，５，７にそれぞれ示し、ブロー成形前の状態は図２，４，６，８にそれぞれ図示ししている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The structure of the double container of the present invention is shown in FIGS. 1, 3, 5 and 7, and the state before blow molding is shown in FIGS.

図１、図２は本発明の二重容器１の第一実施例を示すものであり、本発明の二重容器１は、瓶体状にブロー成形された、口筒部同志３，５を係止した外容体２と内容体４とから構成される二重容器に関するものある。 1 and 2 show a first embodiment of a double container 1 according to the present invention. The double container 1 according to the present invention includes mouthpieces 3 and 5 which are blow-molded into a bottle shape. The present invention relates to a double container composed of a locked outer container 2 and a content body 4.

また、前記外容体２と内容体４のいずれか一方に設けた空隙形成リブ６１により、肩部７から胴部８にかけて空隙９を有する二重壁構造としている。   Further, a double wall structure having a gap 9 from the shoulder portion 7 to the trunk portion 8 is formed by a gap forming rib 61 provided on either the outer body 2 or the content body 4.

前記空隙形成リブ６１は、図１、５に図示したように、外容体２と内容体４間に縦リブ６，１２が周方向に複数設けられている。   As shown in FIGS. 1 and 5, the gap forming rib 61 is provided with a plurality of longitudinal ribs 6, 12 between the outer body 2 and the content body 4 in the circumferential direction.

また、空隙形成リブ９は、図３、７に図示したように、外容体２と内容体４間に周リブ１１、１３が軸線方向に複数設けられている。   As shown in FIGS. 3 and 7, the gap forming rib 9 is provided with a plurality of circumferential ribs 11 and 13 in the axial direction between the outer body 2 and the content body 4.

次に、請求項４の二重容器の成形方法は、図１〜図８に図示したように、外容体２と内容体４とから構成される二重壁構造の二重容器の成形方法であって、口筒部３，５同志を係止して内容体４を形成する該プリフォーム１０を外容体２に挿着組み付けし、瓶体状に成形された外容体２を成形型としてプリフォーム１０をブロー成形すると共に、外容体２とプリフォーム１０のいずれか一方の空隙形成リブ６１により肩部７から胴部８にかけて空隙が形成されている。
また、ブロー成形の際、内容体４と外容体２の口筒部３，５同志の組付き部分に形成される、図２に図示したような、エアが逃げる僅かな隙間を通してリークしているので、問題なく成形できる。 Next, as shown in FIGS. 1 to 8, the method for forming a double container according to claim 4 is a method for forming a double container having a double wall structure composed of an outer container 2 and a content body 4. Then, the preform 10 that forms the contents body 4 by locking the mouth tube portions 3 and 5 is inserted and assembled to the outer body 2, and the outer body 2 formed in a bottle shape is used as a molding die. While the reform 10 is blow-molded, a gap is formed from the shoulder 7 to the body 8 by the gap forming rib 61 of either the outer body 2 or the preform 10.
Further, during blow molding, the air is leaking through a slight gap through which air escapes as shown in FIG. So it can be molded without problems.

空隙形成リブ６１は、ブロー成形前の図２に図示したように、プリフォーム１０の外周面に、縦リブ６を周方向に複数設けられ、ブロー成形後は図１に図示した二重容器に成形されている。   As shown in FIG. 2 before blow molding, the gap forming rib 61 is provided with a plurality of longitudinal ribs 6 in the circumferential direction on the outer peripheral surface of the preform 10, and after blow molding, the double container shown in FIG. Molded.

また、空隙形成リブ６１は、ブロー成形前の図４に図示したように、プリフォーム１０の外周面に、周リブ１１を軸線方向に複数設けられ、ブロー成形後は図３に図示した二重容器に成形されている。   Further, as shown in FIG. 4 before blow molding, the gap forming rib 61 is provided with a plurality of peripheral ribs 11 in the axial direction on the outer peripheral surface of the preform 10, and after the blow molding, the double ribs shown in FIG. Molded into a container.

また、前記空隙形成リブ６１は、ブロー成形前の図６に図示したように、外容体２の内壁面に、縦リブ１２を周方向に複数設けられ、ブロー成形後は図５に図示した二重容器に成形されている。   Further, as shown in FIG. 6 before blow molding, the gap forming rib 61 is provided with a plurality of longitudinal ribs 12 in the circumferential direction on the inner wall surface of the outer container 2, and after blow molding, the two gap ribs 61 shown in FIG. It is molded into a heavy container.

さらに、前記空隙形成リブ６１は、ブロー成形前の図８に図示したように、外容体２の内璧面に、周リブ１３を軸線方向に複数設けられ、ブロー成形後は図７に図示した二重容器に成形されている。   Further, as shown in FIG. 8 before blow molding, the gap forming rib 61 is provided with a plurality of peripheral ribs 13 in the axial direction on the inner wall surface of the outer container 2, and after blow molding, it is shown in FIG. Molded into a double container.

なお、ブロー成形は、２軸延伸ブロー成形、その他のブロー成形でもよい。   The blow molding may be biaxial stretch blow molding or other blow molding.

本発明の二重容器の一実施例を示し、（ａ）は半縦断正面図、（ｂ）はＡ―Ａ断面図である。One Example of the double container of this invention is shown, (a) is a half vertical front view, (b) is AA sectional drawing. 本発明の図１の実施例におけるブロー成形前の状態図であり、（ａ）は半縦断正面図、（ｂ）はＢ―Ｂ断面図である。It is a state figure before blow molding in the example of Drawing 1 of the present invention, (a) is a half longitudinal front view, and (b) is a BB sectional view. 本発明の二重容器の別実施例を示し、（ａ）は半縦断正面図、（ｂ）はＣ―Ｃ断面図である。The another Example of the double container of this invention is shown, (a) is a half vertical front view, (b) is CC sectional drawing. 本発明の図３の実施例におけるブロー成形前の状態図であり、ａ）は半縦断正面図、（ｂ）はＥ―Ｅ断面図である。It is a state figure before blow molding in the example of Drawing 3 of the present invention, a) is a half vertical front view, and (b) is an EE sectional view. 本発明の二重容器の別実施例を示し、（ａ）は半縦断正面図、（ｂ）はＦ―Ｆ断面図である。The another Example of the double container of this invention is shown, (a) is a half vertical front view, (b) is FF sectional drawing. 本発明の図５の実施例におけるブロー成形前の状態図であり、ａ）は半縦断正面図、（ｂ）はＧ―Ｇ断面図である。It is a state figure before blow molding in the example of Drawing 5 of the present invention, a) is a half longitudinal front view, and (b) is a GG sectional view. 本発明の二重容器の別実施例を示し、（ａ）は半縦断正面図、（ｂ）はＨ―Ｈ断面図である。The another Example of the double container of this invention is shown, (a) is a half vertical front view, (b) is HH sectional drawing. 本発明の図７の実施例におけるブロー成形前の状態図である。FIG. 8 is a state diagram before blow molding in the embodiment of FIG. 7 of the present invention.

符号の説明Explanation of symbols

１ 二重容器
２ 外容体
４ 内容体
３、５ 口筒部
６ 縦リブ
６１ 空隙形成リブ
７ 肩部
８ 胴部
９ 空隙
１０ プリフォーム
１１ 周リブ
１２ 縦リブ
１３ 周リブ DESCRIPTION OF SYMBOLS 1 Double container 2 External body 4 Contents body 3, 5 Portion part 6 Vertical rib 61 Space | gap formation rib 7 Shoulder part 8 Body part 9 Space | gap 10 Preform 11 Peripheral rib 12 Vertical rib 13 Peripheral rib

Claims (8)

瓶体状にブロー成形された、口筒部同志を係止した外容体と内容体とから構成される二重容器において、
前記外容体と内容体のいずれか一方に設けた空隙形成リブにより、肩部から胴部にかけて空隙を有する二重壁構造としたことを特徴とする二重容器。 Is blown into a bottle-shaped, in the double container composed of an outer container body and the contents body locking the mouth tube portion each other,
Double container, characterized in that said by void formation rib provided on one of outer container body and the contents thereof were double wall structure having an air gap toward the body portion from the shoulder. 空隙形成リブは、縦リブを周方向に複数設けて成る請求項１記載の二重容器。   The double container according to claim 1, wherein the gap forming rib is provided with a plurality of longitudinal ribs in the circumferential direction. 空隙形成リブは、周リブを軸線方向に複数設けて成る請求項１記載の二重容器。   The double container according to claim 1, wherein the gap forming rib is provided with a plurality of circumferential ribs in the axial direction. 外容体と内容体とから構成される二重壁構造の二重容器の成形方法であって、口筒部同志を係止して内容体を形成するプリフォームを外容体に挿着組み付けし、瓶体状に成形された外容体を成形型としてプリフォームをブロー成形すると共に、外容体とプリフォームのいずれか一方の空隙形成リブにより肩部から胴部にかけて空隙を形成して成る二重容器の成形方法。   It is a method for forming a double container having a double wall structure composed of an outer body and a content body, and a preform that forms a content body by locking the mouth tube portions is inserted and assembled to the outer body body, A double container in which a preform is blow-molded using a bottle-shaped outer container as a molding die, and a gap is formed from the shoulder to the body by a gap forming rib of either the outer container or the preform. Molding method. 空隙形成リブは、プリフォームの外周面に、縦リブを周方向に複数設けて成る請求項４記載の二重容器の成形方法。   The method for forming a double container according to claim 4, wherein the gap-forming rib is formed by providing a plurality of vertical ribs in the circumferential direction on the outer peripheral surface of the preform. 空隙形成リブは、プリフォームの外周面に、周リブを軸線方向に複数設けて成る請求項４記載の二重容器の成形方法。   5. The method for forming a double container according to claim 4, wherein the gap forming rib is formed by providing a plurality of peripheral ribs in the axial direction on the outer peripheral surface of the preform. 空隙形成リブは、外容体の内壁面に、縦リブを周方向に複数設けて成る請求項４記載の二重容器の成形方法。   The method for forming a double container according to claim 4, wherein the gap forming rib is formed by providing a plurality of longitudinal ribs in the circumferential direction on the inner wall surface of the outer container. 空隙成形リブは、外容体の内璧面に、周リブを軸線方向に複数設けて成る請求項４記載の二重容器の成形方法。   The method for forming a double container according to claim 4, wherein the gap forming rib is formed by providing a plurality of peripheral ribs in the axial direction on the inner wall surface of the outer container.
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