JP7312027B2

JP7312027B2 - Container and method of joining the container

Info

Publication number: JP7312027B2
Application number: JP2019109636A
Authority: JP
Inventors: 敏兼子
Original assignee: KANEKODENKI CO., LTD.
Current assignee: KANEKODENKI CO., LTD.
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2023-07-20
Anticipated expiration: 2039-06-12
Also published as: JP2020200092A

Description

本発明は、物品の運搬などに使用する容器（トレー容器）およびその容器の接合方法に関する。 TECHNICAL FIELD The present invention relates to a container (tray container) used for transporting articles and a method of joining the container.

従来、この種の容器として、ＩＣなどの電子部品を収容するトレーが知られている（特許文献１）。 Conventionally, trays for accommodating electronic components such as ICs are known as this type of container (Patent Document 1).

再表２００６－００４１１７号公報Retable 2006-004117

前述した従来の容器は、合成樹脂材料を射出成形することにより製造するため、製造コストが高く、重いという問題があった。
そこで、真空成形または圧空成形により容器を製造すると、製造コストが低く、軽いので、従来の問題点を解消することができた。
しかし、真空成形または圧空成形により製造された容器は、肉厚が薄く剛性が低いため、部品を収容した状態で容器を運搬したり、容器を段積みしたりすると、容器が変形し易いという問題が生じた。
そこで、部品を収容する容器の底壁下面と、その容器に重ねる容器の底壁上面とを、両面接着テープや接着剤によって接合することにより、剛性を高める手法が採用されている。 The conventional container described above is manufactured by injection molding a synthetic resin material, and thus has problems of high manufacturing cost and heavy weight.
Therefore, when the container is manufactured by vacuum forming or pressure forming, the manufacturing cost is low and the container is light, so that the conventional problems can be solved.
However, since containers manufactured by vacuum forming or pressure forming are thin and have low rigidity, the containers tend to be deformed when they are transported or stacked while containing parts. occurred.
Therefore, a method of increasing the rigidity is adopted by bonding the lower bottom surface of the container containing the components and the upper surface of the bottom wall of the container to be placed on top of the container with a double-sided adhesive tape or an adhesive.

しかし、容器が不要になったときに容器を合成樹脂製品の再生用原料にしようとしても、両面接着テープや接着剤が接着されているため、再生用原料にすることができず、産業廃棄物として廃棄せざるを得なかった。
また、容器に両面接着テープや接着剤を接着する工程が必要なため（手作業で接着しているのが現状である。）、容器の製造効率が低いという問題もある。 However, even if you try to use the container as a raw material for recycling synthetic resin products when it is no longer needed, it cannot be used as a raw material for recycling because it is attached with double-sided adhesive tape or adhesive. had to be discarded as
In addition, since a step of adhering a double-faced adhesive tape or an adhesive to the container is required (at present, the adhesion is done manually), there is also the problem of low production efficiency of the container.

そこで、本願発明は、上記の諸問題を解決するために創出されたものであって、合成樹脂製品の再生用の原料にすることができ、かつ、製造効率を高めることができる容器およびその容器の接合方法を提供することを目的とする。 Therefore, the present invention was created to solve the above-mentioned problems, and a container that can be used as a raw material for recycling synthetic resin products and that can improve manufacturing efficiency, and a container thereof. It aims at providing the joining method of.

（第１発明）
前述した目的を達成するため、本願の第１発明に係る容器の接合方法は、
底壁（２１）と、底壁の周縁（２１ａ）から立ち上がり形成された側壁（２２）と、側壁（２２）から外方に張り出した鍔部（２４，２５）とを有し、上面が開口した下容器（２０）が真空成形または圧空成形により連続成形されて成る合成樹脂製の下容器群と、
物品を収容するための物品収容部（１６）が形成された底壁（１１）と、底壁（１１）の周縁（１１ａ）から立ち上がり形成された側壁（１２）と、側壁（１２）から外方に張り出した鍔部（１４，１５）とを有し、上面が開口した上容器（１０）が真空成形または圧空成形により連続成形されて成る合成樹脂製の上容器群と、
を相互に対向させ、相互に対向する各下容器および各上容器をそれぞれ重ねる第１工程と、
第１工程により相互に重なった下容器（２０）および上容器（１０）を、相互に重なった容器単位で切断し、かつ、相互に重なった上容器および下容器のうち、相互に重なっている所定部位同士を接合することにより、相互に重なった容器単位で接合する第２工程と、を行い、
第２工程は、
第１工程により相互に重なった各下容器（２０）および各上容器（１０）を、相互に重なった容器単位で切断するための切断刃（８１）と、相互に重なった容器同士を容器単位で接合するための第１部材（５０）とがそれぞれ容器単位に配置された切断手段（８０）と、
第１工程により重ねられた上容器群および下容器群を配置可能であり、第１部材（５０）と対向する第２部材（４０）が配置された配置手段（９０）と、
切断手段（８０）および配置手段（９０）の一方を他方に向けて移動させる移動手段（１００）と、を使用し、
第１工程により重ねられた上容器群および下容器群を配置手段（９０）に配置し、移動手段（１００）により切断手段（８０）および配置手段（９０）の一方を他方に向けて移動させることにより、配置手段（９０）に配置された上容器群および下容器群を相互に重なった容器単位に切断するとともに、相互に重なった各容器の所定部位（３１，３２）を両面から第１部材（５０）および第２部材（４０）によってそれぞれ圧接することにより、相互に重なった上容器および下容器を接着テープ（両面接着テープを含む）や接着剤を用いないで容器単位で接合する工程であることを特徴とする。
( First Invention)
In order to achieve the object described above, a method for joining containers according to the first invention of the present application comprises:
It has a bottom wall (21), a side wall (22) rising from the peripheral edge (21a) of the bottom wall, and brim portions (24, 25) projecting outward from the side wall (22), and the upper surface is open. a synthetic resin lower container group formed by continuously forming the lower container (20) by vacuum forming or pressure forming;
A bottom wall (11) formed with an article storage section (16) for storing articles, a side wall (12) formed rising from a peripheral edge (11a) of the bottom wall (11), and an outer side wall (12). an upper container group made of synthetic resin, which is formed by continuously forming an upper container (10) having an open upper surface and having flanges (14, 15) protruding in the opposite direction by vacuum forming or pressure forming ;
facing each other, and overlapping each lower container and each upper container facing each other;
A lower container (20) and an upper container (10) that overlap each other in the first step are cut into units of containers that overlap each other, and the upper container and the lower container that overlap each other are overlapped with each other. a second step of joining the container units that overlap each other by joining the predetermined portions ,
The second step is
A cutting blade (81) for cutting the mutually overlapping lower containers (20) and the mutually overlapping upper containers (10) by the first step, and cutting the mutually overlapping containers into container units. A cutting means (80) in which a first member (50) for joining with is arranged in a container unit, respectively;
arranging means (90) capable of arranging the upper container group and the lower container group superimposed by the first step and having a second member (40) facing the first member (50);
a moving means (100) for moving one of the cutting means (80) and the placing means (90) towards the other;
The upper container group and the lower container group superimposed in the first step are arranged on the arranging means (90), and one of the cutting means (80) and the arranging means (90) is moved toward the other by the moving means (100). As a result, the upper container group and the lower container group arranged on the arranging means (90) are cut into mutually overlapping container units, and predetermined portions (31, 32) of the mutually overlapping containers are cut from both sides in the first direction. A step of joining the upper container and the lower container, which are mutually overlapped, without using an adhesive tape (including a double-sided adhesive tape) or an adhesive by pressing the member (50) and the second member (40), respectively. It is characterized by

（第１発明の効果）
相互に重なった各容器の所定部位を両面から第１部材および第２部材によってそれぞれ圧接することにより、相互に重なった上容器および下容器を接着テープ（両面接着テープを含む）や接着剤を用いないで容器単位で接合することができる。
つまり、上容器および下容器の接合に接着テープや接着剤を使用しないため、使用しなくなった容器を合成樹脂製品の再生用原料にすることができるので、産業廃棄物として廃棄する必要がない。
しかも、容器に両面接着テープや接着剤を接着する工程が不要なため、容器の製造効率を高めることもできる。
さらに、相互に重なった容器単位の切断（多数個取り）および接合を同時に行うことができるため、容器の製造効率を高めることができる。
さらに、切断手段に第１部材を配置し、配置手段に第２部材を配置し、切断手段および配置手段の一方を他方に向けて移動させることにより、容器単位の切断および接合を同時に行うことができるため、容器の製造効率を高めることができる。
(Effect of the first invention)
By pressing predetermined portions of the mutually overlapping containers from both sides by the first member and the second member, respectively, the mutually overlapping upper and lower containers are bonded using an adhesive tape (including a double-sided adhesive tape) or an adhesive. It is possible to join by container unit without
In other words, since no adhesive tape or adhesive is used to join the upper container and the lower container, the unused container can be used as a raw material for recycling synthetic resin products, so there is no need to dispose of it as industrial waste.
Moreover, since the process of adhering the double-sided adhesive tape or the adhesive to the container is not required, the manufacturing efficiency of the container can be improved.
Furthermore, since the cutting (manufacturing of multiple containers) and joining of mutually overlapping container units can be performed at the same time, the manufacturing efficiency of containers can be improved.
Furthermore, by arranging the first member on the cutting means, arranging the second member on the arranging means, and moving one of the cutting means and the arranging means toward the other, the cutting and joining of the container units can be performed at the same time. Therefore, the production efficiency of the container can be improved.

（第２発明）
本願の第２発明に係る容器の製造方法は、前述した第１発明に係る容器の製造方法において、
第１部材（５０）および第２部材（４０）は、それぞれ先端に圧接面（５２，４２）を有し、
第２工程は、
第１部材（５０）および第２部材（４０）の圧接面（５２，４２）同士によって所定部位（３１，３２）の両面を圧接することにより、相互に重なっている所定部位（３１，３２）同士を同じ方向に陥没させるとともに、その陥没部（３０）を相互に重なっている所定部位の陥没方向の外面（２５ａ）から突出させ、かつ、その突出した陥没部（３０）を、その陥没部の基部（３３，３４）から外方に広がった形状にする工程であることを特徴とする。
( Second Invention)
A method for manufacturing a container according to the second invention of the present application is the method for manufacturing a container according to the first invention described above,
The first member (50) and the second member (40) each have pressure contact surfaces (52, 42) at their ends,
The second step is
By pressing both surfaces of the predetermined parts (31, 32) with the pressure contact surfaces (52, 42) of the first member (50) and the second member (40), the predetermined parts (31, 32) overlapping each other are recessed in the same direction, and the recessed portions (30) are protruded from the outer surfaces (25a) of the mutually overlapping predetermined portions in the recessed direction, and the protruding recessed portions (30) are formed into the recessed portions. It is characterized by a step of forming a shape that spreads outward from the base (33, 34) of the.

（第２発明の効果）
相互に重ねられた上容器および下容器において相互に重ねられている部分の所定部位同士が同じ方向に陥没しており、かつ、その陥没部が、相互に重ねられている部分の陥没方向の外面から突出しており、さらに、その突出した陥没部が、その陥没部の基部から外方に広がっているため、その陥没部を形成する所定部位の一方が他方から外れないので、上容器および下容器を接合することができる。
(Effect of the second invention)
Predetermined portions of mutually overlapping portions of the upper container and the lower container that are mutually overlapped are depressed in the same direction, and the depressed portions are the outer surfaces of the overlapping portions in the depression direction. Further, the protruding recess extends outward from the base of the recess, so that one of the predetermined portions forming the recess does not come off from the other. can be spliced .

（第３発明）
本願の第３発明に係る容器の製造方法は、前述した第１発明または第２発明に係る容器の製造方法において、
第１部材（５０）および第２部材（４０）の一方の圧接面（５２）が凹んだ形状に形成されていることを特徴とする。
( Third Invention)
A method for manufacturing a container according to a third invention of the present application is the method for manufacturing a container according to the first or second invention described above,
The pressure contact surface (52) of one of the first member (50) and the second member (40) is formed in a concave shape.

（第３発明の効果）
第１部材および第２部材の一方の圧接面が凹んだ形状に形成されているため、圧接面によって圧縮されて塑性変形した合成樹脂を凹んだ部分に沿って外側に逃がし易い。
つまり、陥没により突出した部分を、その基部から外方に広がらせ易い。
(Effect of the third invention)
Since the pressure contact surface of one of the first member and the second member is formed in a concave shape, the synthetic resin that has been compressed and plastically deformed by the pressure contact surface can easily escape to the outside along the concave portion.
In other words, it is easy to cause the portion that protrudes due to the depression to expand outward from the base.

（第４発明）
本願の第４発明に係る容器の製造方法は、前述した第１発明ないし第３発明のいずれかに係る容器の製造方法において、
下容器（２０）の鍔部（２３）は、下容器（２０）の側壁（２２）の上縁から外方に張り出しており、かつ、上容器（１０）の鍔部（１３）は、上容器（１０）の側壁（１２）の上縁から外方に張り出しており、
所定部位（３１，３２）は、相互に重なった上容器（１０）および下容器（２０）のうち、相互に重なった鍔部（１３，２３）に設定されており、
切断刃（８１）は、相互に重なった鍔部（１３，２３）の外周縁に沿った形状に形成されていることを特徴とする。
( Fourth invention)
A method for manufacturing a container according to a fourth invention of the present application is the method for manufacturing a container according to any one of the first to third inventions described above,
The flange (23) of the lower container (20) protrudes outward from the upper edge of the side wall (22) of the lower container (20), and the flange (13) of the upper container (10) projecting outward from the upper edge of the side wall (12) of the container (10),
The predetermined parts (31, 32) are set in the mutually overlapping flanges (13, 23) of the mutually overlapping upper container (10) and the lower container (20),
The cutting blade (81) is characterized in that it is formed in a shape along the outer peripheral edges of the mutually overlapping flanges (13, 23).

（第４発明の効果）
切断方向および接合方向を合わせることができるため、切断および接合を同時に行い易い。しかも、切断箇所と接合箇所とが近いため、切断および接合のタイミングを調整し易い。 (Effect of the fourth invention)
Since the cutting direction and the joining direction can be matched, cutting and joining can be easily performed at the same time. Moreover, since the cut portion and the joint portion are close to each other, it is easy to adjust the timing of cutting and joining.

本発明の容器および容器の接合方法を実施すれば、合成樹脂製品の再生用の原料にすることができ、かつ、製造効率を高めることができる容器および容器の接合方法を提供することができる。 By carrying out the container and the method for joining containers according to the present invention, it is possible to provide a container and a method for joining a container that can be used as a raw material for recycling synthetic resin products and that can improve the production efficiency.

本発明の第１実施形態に係る容器を構成する上容器の平面図である。3 is a plan view of an upper container that constitutes the container according to the first embodiment of the present invention; FIG. 図１に示す上容器の右側面図である。Fig. 2 is a right side view of the upper container shown in Fig. 1; 本発明の実施形態に係る容器を構成する下容器の平面図である。4 is a plan view of a lower container that constitutes the container according to the embodiment of the present invention; FIG. 図３に示す下容器の右側面図である。4 is a right side view of the lower container shown in FIG. 3; FIG. 上容器および下容器を重ね合わせる方法を示す説明図である。FIG. 10 is an explanatory diagram showing a method of stacking the upper container and the lower container; 上容器および下容器の接合部位を示す説明図であり、（Ａ）は接合部位の拡大平面図、（Ｂ）は（Ａ）の右側面図である。It is explanatory drawing which shows the joint part of an upper container and a lower container, (A) is an enlarged plan view of a joint part, (B) is a right side view of (A). 接合部位を圧接することにより陥没して突出した部分の縦断面拡大図である。It is a longitudinal cross-sectional enlarged view of the part which depressed and protruded by press-contacting a joint site|part. 重ね合わされた上容器および下容器を接合する方法を示す説明図である。FIG. 10 is an explanatory view showing a method of joining the superimposed upper container and lower container; 図８に示す容器の前方右角部の拡大図である。Figure 9 is an enlarged view of the front right corner of the container shown in Figure 8; 図９において接合部位が陥没した状態を示す説明図である。FIG. 10 is an explanatory view showing a state in which the joining portion is depressed in FIG. 9; 連続成形された上容器群の平面図である。FIG. 4 is a plan view of a continuously molded upper container group; 連続成形された下容器群の平面図である。FIG. 4 is a plan view of a continuously molded lower container group; 相互に重ねられた上容器群および下容器群を容器単位に切断および接合する方法を示す説明図である。FIG. 10 is an explanatory view showing a method of cutting and joining an upper container group and a lower container group that are stacked on top of each other into container units; 本発明の第２実施形態において陥没部を形成する過程を示す説明図である。It is explanatory drawing which shows the process which forms a recessed part in 2nd Embodiment of this invention. 本発明の第３実施形態において陥没部を形成する過程を示す説明図である。It is explanatory drawing which shows the process of forming a recessed part in 3rd Embodiment of this invention.

〈第１実施形態〉
本発明の第１実施形態に係る容器およびその容器の接合方法について図を参照しつつ説明する。
［容器の構造］
本発明の実施形態に係る容器の構造について説明する。
図５に示すように、本実施形態に係る容器１は、下容器２０の上に上容器１０を重ねて構成されている。図３に示すように、下容器２０は、平面視略矩形に形成されている。下容器２０は、平面視略矩形の底壁２１と、底壁２１の周縁２１ａから立ち上がり形成された側壁２２（図４）と、側壁２２から外方に張り出した鍔部（フランジ）２３とを有し、上面が開口している。
図３に示すように、底壁２１には、上方に突出した複数のリブ２６が、所定間隔置きに前後方向に形成されている。図４に示すように、鍔部２３は、側壁２２の上縁から外方に張り出すように形成されている。鍔部２３は、前方に形成された帯状の前鍔部２３ａと、後方に形成された帯状の後鍔部２３ｂと、左方に形成された帯状の左鍔部２３ｃと、右方に形成された帯状の右鍔部２３ｄと、前鍔部２３ａおよび左鍔部２３ｃ間に形成された左前角鍔部２３ｅと、前鍔部２３ａおよび右鍔部２３ｄ間に形成された右前角鍔部２３ｆと、後鍔部２３ｂおよび左鍔部２３ｃ間に形成された後左角鍔部２３ｇと、後鍔部２３ｂおよび右鍔部２３ｄ間に形成された後右角鍔部２３ｈとを有する。左前角鍔部２３ｅと、右前角鍔部２３ｆと、後右角鍔部２３ｈとは、それぞれＲ面に形成されており、後左角鍔部２３ｇはＣ面に形成されている。Ｃ面に形成された後左角鍔部２３ｇは、下容器２０の向きの認識に使用される。 <First Embodiment>
A container and a method for joining the container according to the first embodiment of the present invention will be described with reference to the drawings.
[Container structure]
A structure of a container according to an embodiment of the present invention will be described.
As shown in FIG. 5, the container 1 according to the present embodiment is constructed by stacking the upper container 10 on the lower container 20 . As shown in FIG. 3, the lower container 20 is generally rectangular in plan view. The lower container 20 includes a bottom wall 21 which is substantially rectangular in plan view, a side wall 22 (FIG. 4) rising from the peripheral edge 21a of the bottom wall 21, and a flange 23 projecting outward from the side wall 22. It has an open top.
As shown in FIG. 3, a plurality of ribs 26 projecting upward are formed on the bottom wall 21 at predetermined intervals in the front-rear direction. As shown in FIG. 4 , the flange portion 23 is formed to protrude outward from the upper edge of the side wall 22 . The collar 23 includes a belt-shaped front collar 23a formed in front, a belt-shaped rear collar 23b formed in the rear, a belt-shaped left collar 23c formed in the left, and a belt-shaped left collar 23c formed in the right. a strip-shaped right collar portion 23d, a left front corner collar portion 23e formed between the front collar portion 23a and the left collar portion 23c, and a right front corner collar portion 23f formed between the front collar portion 23a and the right collar portion 23d. , a rear left corner brim portion 23g formed between the rear brim portion 23b and the left brim portion 23c, and a rear right corner brim portion 23h formed between the rear brim portion 23b and the right brim portion 23d. The left front corner brim portion 23e, the right front corner brim portion 23f, and the rear right corner brim portion 23h are each formed on the R plane, and the rear left corner brim portion 23g is formed on the C plane. A rear left corner brim portion 23g formed on the C surface is used for recognizing the orientation of the lower container 20. As shown in FIG.

以下、前鍔部２３ａと、後鍔部２３ｂと、左鍔部２３ｃと、右鍔部２３ｄとに共通の事項を説明する場合は、下容器２０の帯状鍔部と称し、左前角鍔部２３ｅと、右前角鍔部２３ｆと、後左角鍔部２３ｇと、後右角鍔部２３ｈとに共通の事項を説明する場合は、下容器２０の角鍔部と称する。
左鍔部２３ｃおよび右鍔部２３ｄには、上方に突出形成された突出部２４が、それぞれ複数箇所に形成されており、各角鍔部には、上方に突出形成された突出部２５がそれぞれ形成されている。 Hereinafter, when describing items common to the front collar portion 23a, the rear collar portion 23b, the left collar portion 23c, and the right collar portion 23d, the band-shaped collar portion of the lower container 20 is referred to as the left front corner collar portion 23e. When describing items common to the front right corner brim portion 23f, the rear left corner brim portion 23g, and the rear right corner brim portion 23h, the corner brim portion of the lower container 20 will be referred to.
The left flange 23c and the right flange 23d are each formed with a plurality of protrusions 24 that protrude upward, and each square flange has a protrusion 25 that protrudes upward. formed.

図１に示すように、上容器１０は、平面視略矩形に形成されている。上容器１０は、物品を収容するための複数の物品収容部１６が形成された平面視略矩形の底壁１１と、底壁１１の周縁１１ａから立ち上がり形成された側壁１２（図２）と、側壁１２から外方に張り出した鍔部（フランジ）１３とを有し、上面が開口している。
図２に示すように、鍔部１３は、側壁１２の上縁から外方に張り出すように形成されている。鍔部１３は、前方に形成された帯状の前鍔部１３ａと、後方に形成された帯状の後鍔部１３ｂと、左方に形成された帯状の左鍔部１３ｃと、右方に形成された帯状の右鍔部１３ｄと、前鍔部１３ａおよび左鍔部１３ｃ間に形成された左前角鍔部１３ｅと、前鍔部１３ａおよび右鍔部１３ｄ間に形成された右前角鍔部１３ｆと、後鍔部１３ｂおよび左鍔部１３ｃ間に形成された後左角鍔部１３ｇと、後鍔部１３ｂおよび右鍔部１３ｄ間に形成された後右角鍔部１３ｈとを有する。左前角鍔部１３ｅと、右前角鍔部１３ｆと、後右角鍔部１３ｈとは、それぞれＲ面に形成されており、後左角鍔部１３ｇはＣ面に形成されている。Ｃ面に形成された後左角鍔部１３ｇは、上容器１０の向きの認識に使用される。 As shown in FIG. 1, the upper container 10 is generally rectangular in plan view. The upper container 10 has a substantially rectangular bottom wall 11 formed with a plurality of article accommodating portions 16 for accommodating articles, a side wall 12 (FIG. 2) rising from a peripheral edge 11a of the bottom wall 11, It has a collar portion (flange) 13 projecting outward from the side wall 12 and has an open upper surface.
As shown in FIG. 2 , the collar portion 13 is formed to protrude outward from the upper edge of the side wall 12 . The collar portion 13 includes a belt-shaped front collar portion 13a formed forward, a belt-shaped rear collar portion 13b formed rearward, a belt-shaped left collar portion 13c formed on the left, and a belt-shaped left collar portion 13c formed on the right side. a strip-shaped right collar portion 13d, a left front corner collar portion 13e formed between the front collar portion 13a and the left collar portion 13c, and a right front corner collar portion 13f formed between the front collar portion 13a and the right collar portion 13d. , a rear left corner brim portion 13g formed between the rear brim portion 13b and the left brim portion 13c, and a rear right corner brim portion 13h formed between the rear brim portion 13b and the right brim portion 13d. The left front corner brim portion 13e, the right front corner brim portion 13f, and the rear right corner brim portion 13h are each formed on the R plane, and the rear left corner brim portion 13g is formed on the C plane. A rear left corner brim portion 13g formed on the C surface is used for recognizing the orientation of the upper container 10. As shown in FIG.

以下、前鍔部１３ａと、後鍔部１３ｂと、左鍔部１３ｃと、右鍔部１３ｄとに共通の事項を説明する場合は、上容器１０の帯状鍔部と称し、左前角鍔部１３ｅと、右前角鍔部１３ｆと、後左角鍔部１３ｇと、後右角鍔部１３ｈとに共通の事項を説明する場合は上容器１０の角鍔部と称する。
上容器１０の各帯状鍔部には、上方に突出形成された突出部１４が、それぞれ複数箇所に形成されており、各角鍔部には、上方に突出形成された突出部１５がそれぞれ形成されている。各突出部１４，１５は、下容器２０の各突出部２４，２５に対応する位置にそれぞれ形成されている。また、上容器１０の鍔部１３は、上容器１０を下容器２０の上に重ねたときに、下容器２０の鍔部２３と重なって接触し、かつ、鍔部１３の先端が下容器２０の鍔部２３の先端よりも外方に突出しない形状および大きさに形成されている。また、各突出部１４，１５は、上容器１０を下容器２０の上に重ねたときに、下容器２０の各突出部２４，２５がそれぞれ嵌合される形状および大きさに形成されている。さらに、上容器１０は、下容器２０の上に重ねたときに、底壁１１の下面が下容器２０の底壁２１の上面と接触する形状および大きさに形成されている。このように、上容器１０および下容器２０を相互に重ねたときに、鍔部同士が接触し、かつ、底壁同士が接触するため、上容器１０および下容器２０同士の密着度が高まり、容器１の剛性を高めることができるので、変形し難いようにすることができる。
上容器１０および下容器２０は、それぞれ真空成形または圧空成形により成形された合成樹脂製である。合成樹脂として、ＰＣ（ポリカーボネート）、ＰＰ（ポリプロピレン）、ＰＥ（ポリエチレン）、ＰＥＴ（ポリエチレンテレフタラート）などを用いることができる。 Hereinafter, when describing items common to the front collar portion 13a, the rear collar portion 13b, the left collar portion 13c, and the right collar portion 13d, the band-shaped collar portion of the upper container 10 will be referred to as the left front corner collar portion 13e. , and the right front corner brim portion 13f, the rear left corner brim portion 13g, and the rear right corner brim portion 13h are referred to as the corner brim portion of the upper container 10 when describing common matters.
Each belt-shaped brim of the upper container 10 has a plurality of protrusions 14 that protrude upward, and each square brim has a protrusion 15 that protrudes upward. It is The projecting portions 14 and 15 are formed at positions corresponding to the projecting portions 24 and 25 of the lower container 20, respectively. Further, when the upper container 10 is stacked on the lower container 20, the flange portion 13 of the upper container 10 overlaps and contacts the flange portion 23 of the lower container 20, and the tip of the flange portion 13 contacts the lower container 20. It is formed in a shape and size that does not protrude outward beyond the tip of the collar portion 23 of the. The protruding portions 14 and 15 are formed in such a shape and size that the protruding portions 24 and 25 of the lower container 20 are fitted when the upper container 10 is placed on the lower container 20. . Further, the upper container 10 is shaped and sized so that the lower surface of the bottom wall 11 contacts the upper surface of the bottom wall 21 of the lower container 20 when placed on the lower container 20 . In this way, when the upper container 10 and the lower container 20 are placed on top of each other, the flanges come into contact with each other and the bottom walls come into contact with each other. Since the rigidity of the container 1 can be increased, it can be made difficult to deform.
The upper container 10 and the lower container 20 are each made of synthetic resin formed by vacuum forming or pressure forming. As the synthetic resin, PC (polycarbonate), PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate), etc. can be used.

［容器の接合方法］
本発明の実施形態に係る容器の接合方法について説明する。
図５に示すように、底壁２１を下向きにした下容器２０の上に、底壁１１を下向きにした上容器１０を重ねて容器１を形成する。また、底壁１１を上向きにした上容器１０の上に、底壁２１を上向きにした下容器２０を重ねて容器１を形成することもできる。このように、上容器１０および下容器２０を相互に重ねる工程は、本発明の第１工程の一例である。 [Container joining method]
A method for joining containers according to an embodiment of the present invention will be described.
As shown in FIG. 5, the container 1 is formed by stacking the upper container 10 with the bottom wall 11 facing downward on the lower container 20 with the bottom wall 21 facing downward. Alternatively, the container 1 can be formed by stacking the lower container 20 with the bottom wall 21 facing upward on the upper container 10 with the bottom wall 11 facing upward. Thus, the step of overlapping the upper container 10 and the lower container 20 is an example of the first step of the present invention.

次に、上容器１０および下容器２０の相互に重なっている所定部位同士を接合する。本実施形態では、図６（Ａ）に示すように、上容器１０の右前角鍔部１３ｆから突出形成された突出部１５と、下容器２０の右前角鍔部２３ｆから突出形成された突出部２５とが相互に重なっており、その重なっている部分の一部が所定部位３１，３２に設定されている。所定部位３１は、上容器１０の右前角鍔部１３ｆに設定されており、所定部位３２は、下容器２０の右前角鍔部２３ｆに設定されており、所定部位３１，３２は、相互に重なっている。図示しないが、右前角鍔部１３ｆ、２３ｆにそれぞれ突出形成された突出部１５，２５の他に、上容器１０の各角鍔部から突出形成された各突出部１５および下容器２０の各角鍔部から突出形成された各突出部２５も相互に重なっており、その重なっている部分にも同様の所定部位３１，３２が設定されている。つまり、本実施形態では、上容器１０および下容器２０の相互に重なっている部分のうち、対角上に配置された各突出部１５および各突出部２５同士を接合する。 Next, predetermined portions of the upper container 10 and the lower container 20 that overlap each other are joined together. In this embodiment, as shown in FIG. 6A, a projecting portion 15 projecting from the right front corner brim portion 13f of the upper container 10 and a projecting portion projecting from the right front corner brim portion 23f of the lower container 20 are formed. 25 are overlapped with each other, and a part of the overlapped portion is set as predetermined portions 31 and 32 . The predetermined portion 31 is set at the right front corner brim portion 13f of the upper container 10, the predetermined portion 32 is set at the right front corner brim portion 23f of the lower container 20, and the predetermined portions 31 and 32 overlap each other. ing. Although not shown, in addition to protrusions 15 and 25 protruding from the right front corner flanges 13f and 23f, protrusions 15 protruding from the corner flanges of the upper container 10 and corners of the lower container 20 are also provided. Each projecting portion 25 projecting from the collar portion is also overlapped with each other, and similar predetermined portions 31 and 32 are set in the overlapped portions. That is, in the present embodiment, of the mutually overlapping portions of the upper container 10 and the lower container 20, the protrusions 15 and the protrusions 25 arranged diagonally are joined together.

図８および図９に示すように、本実施形態では、第１部材５０および第２部材４０を用いて、上容器１０および下容器２０の所定部位３１，３２同士を接合する。第１部材５０は、棒状の軸部材５１を有し、縦断面が円弧状で平面視球面状に凹んだ圧接面５２を軸部材５１の先端に有する。第２部材４０は、棒状の軸部材４１を有し、圧接面４２を軸部材４１の先端に有する。本実施形態では、圧接面４２は、縦断面が円弧状で平面視球面状に膨らんだ形状に形成されている。第２部材４０の圧接面４２が所定部位３１に当接し、圧接面５２が圧接面４２と対向するように第１部材５０を配置し、第１部材５０を第２部材４０に向けて移動させ、相互に重なった所定部位３１，３２を両面から圧接する。すると、図１０に示すように、第２部材４０の圧接面４２が圧接した部分は、下方に向けて陥没し、下容器２０の突出部２５の下面から突出する。 As shown in FIGS. 8 and 9, in this embodiment, the first member 50 and the second member 40 are used to join the predetermined portions 31 and 32 of the upper container 10 and the lower container 20 together. The first member 50 has a rod-shaped shaft member 51 , and has, at the tip of the shaft member 51 , a pressure contact surface 52 which has an arcuate longitudinal section and is recessed in a spherical shape in a plan view. The second member 40 has a rod-shaped shaft member 41 and a pressure contact surface 42 at the tip of the shaft member 41 . In the present embodiment, the pressure contact surface 42 has an arcuate vertical cross section and is formed in a bulging spherical shape in a plan view. The first member 50 is arranged so that the pressure contact surface 42 of the second member 40 contacts the predetermined portion 31 and the pressure contact surface 52 faces the pressure contact surface 42 , and the first member 50 is moved toward the second member 40 . , the predetermined portions 31 and 32 overlapping each other are pressed from both sides. Then, as shown in FIG. 10 , the portion of the second member 40 with which the pressure contact surface 42 is pressed collapses downward and protrudes from the lower surface of the projecting portion 25 of the lower container 20 .

ここで、所定部位３１，３２同士が接合された部分の構造について図７を参照しつつ説明する。
図７に示すように、相互に重ねられている突出部１５，２５の所定部位３１，３２同士が同じ方向（図では下方）に陥没しており、かつ、その陥没部３０が、相互に重ねられている突出部１５，２５の陥没方向の外面、つまり突出部２５の外面２５ａから突出しており、さらに、その突出した陥没部３０が、陥没部３０の基部３３，３４から外方に広がっている。陥没部を形成している突出部１５の所定部位３１および突出部２５の所定部位３２は、それぞれ陥没方向に位置する突出部２５の外面２５ａよりも下方（陥没方向）に位置している。また、陥没部３０を形成している所定部位３１の径は、その基部３３の径よりも大きく、かつ、陥没部３０を形成している所定部位３２の径は、その基部３４の径よりも大きい。また、陥没部３０の先端部３５は、第１部材５０の圧接面５２に対応した形状、つまり、陥没方向に膨出した球面に形成されている。換言すると、陥没部３０は、茸（キノコ）形状に形成されている。 Here, the structure of the portion where the predetermined parts 31 and 32 are joined will be described with reference to FIG.
As shown in FIG. 7, predetermined portions 31 and 32 of mutually overlapping protrusions 15 and 25 are depressed in the same direction (downward in the drawing), and the depressed portions 30 are overlapped with each other. The recessed portion 30 protrudes from the outer surface of the projecting portions 15 and 25 in the depression direction, that is, the outer surface 25a of the projecting portion 25, and the projecting depressed portion 30 spreads outward from the base portions 33 and 34 of the depressed portion 30. there is A predetermined portion 31 of the projecting portion 15 and a predetermined portion 32 of the projecting portion 25 forming the recessed portion are positioned below (recessing direction) the outer surface 25a of the projecting portion 25 positioned in the recessing direction. Further, the diameter of the predetermined portion 31 forming the depressed portion 30 is larger than the diameter of the base portion 33 thereof, and the diameter of the predetermined portion 32 forming the depressed portion 30 is larger than the diameter of the base portion 34 thereof. big. Further, the tip portion 35 of the depressed portion 30 is formed in a shape corresponding to the pressure contact surface 52 of the first member 50, that is, formed in a spherical surface that bulges in the depression direction. In other words, the depressed portion 30 is formed in a mushroom shape.

ここで、陥没部３０が上記の形状に形成される原理について説明する。
所定部位３１，３２は、第１部材５０の圧接面５２および第２部材４０の圧接面４２によって圧接されると、陥没するとともに塑性変形し、陥没部３０が形成される。ここで、圧接面５２および圧接面４２によって圧縮された陥没部３０は、圧接面５２および圧接面４２の各形状に対応した形状に形成される。つまり、下方に膨出した形状に形成される。そして、陥没部３０の圧縮が進行すると、陥没部３０は圧接面５２の球面に沿って外方に広がろうとする（逃げようとする）。そして、陥没部３０は、圧縮が進行するに従って圧接面５２に沿って外方へ広がる。詳細には、陥没部３０を形成している所定部位３１の径は、所定部位３１の基部３３の径よりも大きく、所定部位３１は基部３３よりも外方に広がっている。さらに、陥没部３０を形成している所定部位３２の径は、所定部位３２の基部３４の径よりも大きく、所定部位３２は基部３４よりも外方に広がっている。 Here, the principle of forming the depressed portion 30 in the above shape will be described.
When the predetermined portions 31 and 32 are pressed by the pressure contact surface 52 of the first member 50 and the pressure contact surface 42 of the second member 40, they are depressed and plastically deformed to form the depressed portion 30. As shown in FIG. Here, the depressed portion 30 compressed by the pressure contact surface 52 and the pressure contact surface 42 is formed in a shape corresponding to each shape of the pressure contact surface 52 and the pressure contact surface 42 . That is, it is formed in a shape that bulges downward. Then, as the compression of the recessed portion 30 progresses, the recessed portion 30 tries to spread outward (try to escape) along the spherical surface of the pressure contact surface 52 . The depressed portion 30 expands outward along the pressure contact surface 52 as the compression progresses. Specifically, the diameter of the predetermined portion 31 forming the depressed portion 30 is larger than the diameter of the base portion 33 of the predetermined portion 31 , and the predetermined portion 31 spreads outward from the base portion 33 . Further, the diameter of the predetermined portion 32 forming the depressed portion 30 is larger than the diameter of the base portion 34 of the predetermined portion 32 , and the predetermined portion 32 spreads outward from the base portion 34 .

これにより、基部３３，３４は、それぞれ外面２５ａに対して鋭角に屈曲した形状となり、陥没方向に位置する基部３４が、陥没方向とは逆方向に位置する基部３３に食い込んだ状態になる。換言すると、基部３４および基部３３が相互に係合された状態になる。また、陥没部３０を形成している所定部位３１の外縁部３６および所定部位３２の外縁部３７は、それぞれ外面２５ａに対して鋭角に屈曲した形状になっており、内側、つまり圧接面４２に近い方に位置する外縁部３６が、外側、つまり圧接面５２に近い方に位置する外縁部３７に食い込んだ状態になっている。換言すると、外縁部３６，３７が相互に係合された状態になっている。
このように、陥没部３０が、その基部３３，３４よりも外方に広がることにより、基部３３，３４が相互に係合され、かつ、外縁部３６，３７が相互に係合された状態になるため、所定部位３１が設定されている突出部１５と所定部位３２が設定されている突出部２５とが接合された状態になる。 As a result, the base portions 33 and 34 are bent at an acute angle with respect to the outer surface 25a, and the base portion 34 positioned in the depression direction bites into the base portion 33 positioned in the opposite direction to the depression direction. In other words, base 34 and base 33 are engaged with each other. Further, an outer edge portion 36 of the predetermined portion 31 and an outer edge portion 37 of the predetermined portion 32 forming the depressed portion 30 are bent at an acute angle with respect to the outer surface 25a. The outer edge portion 36 positioned closer is biting into the outer edge portion 37 positioned closer to the outer side, that is, the pressure contact surface 52 . In other words, the outer edges 36, 37 are engaged with each other.
In this manner, recessed portion 30 expands outward beyond its bases 33, 34 so that bases 33, 34 are engaged with each other and outer edges 36, 37 are engaged with each other. Therefore, the projecting portion 15 having the predetermined portion 31 and the projecting portion 25 having the predetermined portion 32 are joined together.

上述したように、本実施形態の容器１は、底壁２１と、底壁２１の周縁２１ａから立ち上がり形成された側壁２２と、側壁２２から外方に張り出した鍔部２３とを有し、上面が開口しており、真空成形または圧空成形により成形された合成樹脂製の下容器２０と、物品を収容するための物品収容部１６が形成された底壁１１と、底壁１１の周縁１１ａから立ち上がり形成された側壁１２と、側壁１２から外方に張り出した鍔部１３とを有し、上面が開口しており、真空成形または圧空成形により成形された合成樹脂製の上容器１０と、が相互に重ねられており、相互に重ねられた上容器１０および下容器２０において相互に重ねられている部分の所定部位３１，３２同士が同じ方向に陥没しており、かつ、その陥没部３０が、相互に重ねられている部分の陥没方向の外面２５ａから突出しており、さらに、その突出した陥没部３０が、陥没部３０の基部３３，３４から外方に広がっていることを特徴としている。 As described above, the container 1 of this embodiment has the bottom wall 21, the side walls 22 rising from the peripheral edge 21a of the bottom wall 21, and the flange 23 projecting outward from the side walls 22. is open, a synthetic resin lower container 20 formed by vacuum forming or pressure forming, a bottom wall 11 formed with an article accommodating portion 16 for accommodating articles, and a peripheral edge 11a of the bottom wall 11 The upper container 10 is made of synthetic resin and is formed by vacuum forming or pressure forming, and has a side wall 12 that is formed to stand up, a flange portion 13 that protrudes outward from the side wall 12, and an upper surface that is open. In the upper container 10 and the lower container 20 which are stacked on each other, the predetermined portions 31 and 32 of the mutually stacked portions are depressed in the same direction, and the depressed portions 30 are recessed in the same direction. , projecting from the outer surfaces 25a of the overlapping portions in the depression direction, and the projecting depressions 30 extend outward from the bases 33, 34 of the depressions 30. As shown in FIG.

［容器の接合方法の実施例］
本発明の実施形態に係る容器の接合方法の実施例について図１１ないし図１３を参照しつつ説明する。
本実施例では、トムソン刃を用いたトムソン加工を適用する場合を説明する。最初に、接合に準備するものについて説明する。
真空成形または圧空成形により、合成樹脂製シート７１（図１１）に複数の上容器１０が連続形成された上容器群と、合成樹脂製シート７２に複数の下容器２０が連続形成された下容器群とを製造する。次に、各下容器２０の上に各上容器１０が重なるようにして下容器群の上に上容器群を重ね、複数の容器１が連続形成された容器群７０（図１１）を作成する。この作成を行う工程は、本発明の第１工程の一例である。図１１に示す例では、真空成形に用いた合成樹脂製シート７１，７２に４個の容器１から成る容器群７０が形成されている。図１１は、容器群７０を平面視したものであるため、上容器１０が図示されており、下容器２０および合成樹脂製シート７２は図示されていない。各上容器１０の周縁には、容器群７０を容器１単位で切断するための切断予定線７３が設定されている。 [Example of method for joining containers]
An example of a method for joining containers according to an embodiment of the present invention will be described with reference to FIGS. 11 to 13. FIG.
In this embodiment, a case of applying Thomson machining using a Thomson blade will be described. First, what is prepared for joining will be described.
An upper container group in which a plurality of upper containers 10 are continuously formed on a synthetic resin sheet 71 (FIG. 11) and a lower container in which a plurality of lower containers 20 are continuously formed on a synthetic resin sheet 72 by vacuum forming or pressure forming. to manufacture a group. Next, the upper container group is stacked on the lower container group so that each upper container 10 is stacked on each lower container 20 to form a container group 70 (FIG. 11) in which a plurality of containers 1 are continuously formed. . This creation step is an example of the first step of the present invention. In the example shown in FIG. 11, a container group 70 consisting of four containers 1 is formed on synthetic resin sheets 71 and 72 used for vacuum forming. Since FIG. 11 is a plan view of the container group 70, the upper container 10 is illustrated, and the lower container 20 and the synthetic resin sheet 72 are not illustrated. A planned cutting line 73 for cutting the container group 70 for each container is set on the periphery of each upper container 10 .

また、図１２に示す切断用部材８０を用意する。切断用部材８０は、容器群７０を容器１単位に切断するものであり、ベニヤ板などの木製板８１と、トムソン刃８１と、第１部材５０とを備えている。各トムソン刃８１は、木製板８１の板面から起立した姿勢となるように、木製板８１に打ち込まれ、固定されている。トムソン刃８１を平面視した形状は、容器群７０に設定された切断予定線７３に対応した形状に形成されている。また、各トムソン刃８１は、容器群７０に配置された各容器１の切断予定線７３に対応した位置に配置されている。さらに、各トムソン刃８１の内側であって、各容器１の接合部位に対応する位置には、第１部材５０がそれぞれ配置されている。各第１部材５０は、各トムソン刃８１と同様に木製板８１の板面からそれぞれ起立した姿勢で木製板８１に固定されており、先端の圧接面５２（図９）が起立方向を向くようにそれぞれ固定されている。トムソン刃８１は本発明の切断手段の一例である。 Also, a cutting member 80 shown in FIG. 12 is prepared. The cutting member 80 cuts the container group 70 into individual containers, and includes a wooden board 81 such as a plywood board, a Thomson blade 81 and a first member 50 . Each Thomson blade 81 is driven into and fixed to the wooden board 81 so as to stand up from the board surface of the wooden board 81 . The shape of the Thomson blade 81 in a plan view is formed in a shape corresponding to the intended cutting line 73 set on the container group 70 . Further, each Thomson blade 81 is arranged at a position corresponding to the planned cutting line 73 of each container 1 arranged in the container group 70 . Furthermore, the first member 50 is arranged inside each Thomson blade 81 at a position corresponding to the joining portion of each container 1 . Each first member 50 is fixed to the wooden board 81 in an upright posture from the board surface of the wooden board 81 in the same manner as the Thomson blades 81. are fixed respectively. The Thomson blade 81 is an example of the cutting means of the present invention.

また、図１３に示す配置用部材９０を用意する。配置用部材９０は、容器群７０を配置するものであり、基台９１と、緩衝シート９２と、第２部材４０とを備えている。基台９１の上面は、容器群７０を水平姿勢で配置したときに、容器１の外周縁がはみ出ることのない大きさに形成されている。基台９１の上面には、緩衝シート９２が配置されている。緩衝シート９２は、容器群７０を切断したときに、切断による衝撃を緩衝し、トムソン刃８２の刃先を保護するためのものである。各第２部材４０は、切断用部材８０に配置された各第１部材５０とそれぞれ対向する位置に配置されている。各第２部材４０は、基台９１の上面からそれぞれ起立した姿勢で基台９１に固定されており、各先端は、緩衝シート９２を貫通しており、先端の圧接面４２（図９）が起立方向を向いている。つまり、各第２部材４０の各圧接面４２は、各第１部材５０の各圧接面５２とそれぞれ対向している。
また、図１３に示すプレス機１００を用意する。プレス機１００は、切断用部材８０を固定するための固定部材１０１と、固定部材１０１を昇降させるための昇降装置（図示省略）とを備えている。配置用部材９０は本発明の配置手段の一例であり、プレス機１００は本発明の移動手段の一例である。 Also, an arrangement member 90 shown in FIG. 13 is prepared. The arranging member 90 is for arranging the container group 70 , and includes a base 91 , a cushioning sheet 92 and a second member 40 . The upper surface of the base 91 is sized so that the outer periphery of the container 1 does not protrude when the container group 70 is arranged in a horizontal posture. A buffer sheet 92 is arranged on the upper surface of the base 91 . The cushioning sheet 92 is for cushioning the cutting impact and protecting the cutting edge of the Thomson blade 82 when the container group 70 is cut. Each second member 40 is arranged at a position facing each first member 50 arranged on the cutting member 80 . Each second member 40 is fixed to the base 91 in an upright posture from the upper surface of the base 91, and each tip penetrates the buffer sheet 92, and the pressure contact surface 42 (FIG. 9) of the tip is It faces the standing direction. That is, each pressure contact surface 42 of each second member 40 faces each pressure contact surface 52 of each first member 50 .
Also, a press machine 100 shown in FIG. 13 is prepared. The press machine 100 includes a fixing member 101 for fixing the cutting member 80 and an elevating device (not shown) for elevating the fixing member 101 . The arranging member 90 is an example of the arranging means of the present invention, and the pressing machine 100 is an example of the moving means of the present invention.

次に、容器の接合方法について図１３を参照しつつ説明する。
固定部材１０１には、切断用部材８０が固定されている。各トムソン刃８１の各刃先は、それぞれ下方を向いている。容器群７０を各上容器１０が下方を向くようにして基台９１の上面に配置された緩衝シート９２の表面に載置する。つまり、各下容器２０の上に各上容器１０を重ねた状態から上下を逆にして載置する。また、各第２部材４０の各圧接面４２（図９）が、それぞれ接合予定である所定部位３１（図６（Ａ））に当接するように載置する。次に、プレス機１００の昇降装置（図示省略）を作動させ、固定部材１０１を加工させ、各トムソン刃８２により、容器群７０を容器１単位に切断するとともに、第１部材５０および第２部材４０によって所定部位３１，３２を両面から圧接する。これにより、容器群７０は容器１単位に切断され、かつ、各上容器１０および各下容器２０は、各所定部位３１，３２において接合される。このように、本実施形態の接合方法は、容器群７０の容器１単位の切断と、各上容器１０および各下容器２０の接合とを同時に行うことができる。上記の切断および接合を行う工程は、本発明の第２工程の一例である。 Next, a method for joining containers will be described with reference to FIG.
A cutting member 80 is fixed to the fixing member 101 . Each cutting edge of each Thomson blade 81 faces downward. The container group 70 is placed on the surface of the buffer sheet 92 arranged on the upper surface of the base 91 so that each upper container 10 faces downward. That is, each upper container 10 is placed on top of each lower container 20 upside down. Also, each second member 40 is placed so that each pressure contact surface 42 (FIG. 9) is in contact with the predetermined portion 31 (FIG. 6A) to be joined. Next, the lifting device (not shown) of the press machine 100 is operated to process the fixing member 101, and the Thomson blades 82 cut the container group 70 into individual containers, and the first member 50 and the second member 40 presses the predetermined portions 31 and 32 from both sides. As a result, the container group 70 is cut into individual containers, and each upper container 10 and each lower container 20 are joined together at the predetermined portions 31 and 32 . In this manner, the joining method of the present embodiment can simultaneously perform cutting of the container group 70 in units of one container and joining of each upper container 10 and each lower container 20 . The step of cutting and joining is an example of the second step of the present invention.

上述したように、本実施形態の容器の接合方法は、下容器２０が真空成形または圧空成形により連続成形されて成る合成樹脂製の下容器群と、真空成形または圧空成形により連続成形されて成る合成樹脂製の上容器群とを相互に対向させ、相互に対向する各下容器２０および各上容器１０をそれぞれ重ねる第１工程と、第１工程により相互に重なった下容器２０および上容器１０を、相互に重なった容器１単位で切断し、かつ、相互に重なった上容器１０および下容器２０を、相互に重なった容器１単位で接合する第２工程と、を行うことを特徴としている。 As described above, the container joining method of the present embodiment includes a group of synthetic resin lower containers continuously formed by vacuum forming or pressure forming, and a lower container 20 continuously formed by vacuum forming or pressure forming. A first step in which the upper containers made of synthetic resin are made to face each other, and the lower containers 20 and the upper containers 10 facing each other are stacked, and the lower containers 20 and the upper containers 10 are overlapped with each other in the first step. and a second step of cutting the overlapping container unit by unit, and joining the mutually overlapping upper container 10 and lower container 20 by mutually overlapping container unit. .

また、第２工程は、第１工程により相互に重なった各下容器２０および各上容器１０を、相互に重なった容器１単位で切断するためのトムソン刃８２と、相互に重なった容器同士を容器１単位で接合するための第１部材５０とがそれぞれ容器１単位に配置された切断用部材８０と、第１工程により重ねられた上容器群および下容器群を配置可能であり、第１部材５０と対向する第２部材４０が配置された配置用部材９０と、切断用部材８０を配置用部材９０に向けて下降させるプレス機１００と、を使用し、第１工程により重ねられた上容器群および下容器群を配置用部材９０に配置し、プレス機１００により切断用部材８０を配置用部材９０に向けて下降させることにより、配置用部材９０に配置された上容器群および下容器群を相互に重なった容器１単位に切断するとともに、相互に重なった各容器１の所定部位３１，３２を両面から第１部材５０および第２部材４０によってそれぞれ圧接することにより、相互に重なった上容器１０および下容器２０を容器１単位で接合する工程であることを特徴としている。 In the second step, a Thomson blade 82 for cutting each of the mutually overlapping lower containers 20 and each of the upper containers 10 by the first step, and the mutually overlapping containers are separated. A cutting member 80 in which a first member 50 for joining one container is arranged for each container, and an upper container group and a lower container group stacked in the first step can be arranged. Using the arranging member 90 in which the second member 40 facing the member 50 is arranged, and the pressing machine 100 that lowers the cutting member 80 toward the arranging member 90, By arranging the container group and the lower container group on the arranging member 90 and lowering the cutting member 80 toward the arranging member 90 by the pressing machine 100, the upper container group and the lower container group arranged on the arranging member 90 are separated. The group is cut into units of containers 1 that overlap each other, and the predetermined portions 31 and 32 of each container 1 that overlap each other are pressed from both sides by the first member 50 and the second member 40, respectively, so that the containers overlap each other. The process is characterized by joining the upper container 10 and the lower container 20 in units of one container.

さらに、第２工程は、第１部材５０および第２部材４０の先端同士によって所定部位３１，３２の両面を圧接することにより、相互に重なっている所定部位３１，３２同士を同じ方向に陥没させるとともに、その陥没部３０を相互に重なっている所定部位３１，３２の陥没方向の外面２５ａから突出させ、かつ、その突出した陥没部３０を、その陥没部３０の基部３３，３４から外方に広がった形状にする工程であることを特徴としている。 Further, in the second step, both surfaces of the predetermined portions 31 and 32 are pressed against each other by the tips of the first member 50 and the second member 40, thereby causing the mutually overlapping predetermined portions 31 and 32 to collapse in the same direction. At the same time, the depressed portion 30 is caused to protrude from the outer surface 25a of the predetermined portions 31 and 32 overlapping with each other in the depression direction, and the projected depressed portion 30 extends outward from the base portions 33 and 34 of the depressed portion 30. It is characterized in that it is a process of forming a widened shape.

［実施形態の効果］
（１）上述した実施形態の容器および容器の接合方法を実施すれば、相互に重ねられた上容器１０および下容器２０において相互に重ねられている部分の所定部位３１，３２同士が同じ方向に陥没しており、かつ、その陥没部３０が、相互に重ねられている部分の陥没方向の外面２５ａから突出しており、さらに、その突出した陥没部３０が、その陥没部３０の基部３３，３４から外方に広がっているため、その陥没部３０を形成する所定部位３１，３２の一方が他方から外れないので、上容器１０および下容器２０を接合することができる。
つまり、上容器１０および下容器２０の接合に接着テープや接着剤を使用しないため、使用しなくなった容器１を合成樹脂製品の再生用原料にすることができるので、産業廃棄物として廃棄する必要がない。
しかも、容器１に両面接着テープや接着剤を接着する工程が不要なため、容器１の製造効率を高めることもできる。 [Effects of Embodiment]
(1) By carrying out the container and the container bonding method of the above-described embodiment, the predetermined portions 31 and 32 of the overlapping portions of the upper container 10 and the lower container 20 that are mutually overlapped are oriented in the same direction. The depressed portion 30 protrudes from the outer surface 25a of the overlapping portions in the depressed direction, and the protruding depressed portion 30 extends from the base portions 33, 34 of the depressed portion 30. Since one of the predetermined portions 31 and 32 forming the recessed portion 30 does not come off from the other, the upper container 10 and the lower container 20 can be joined.
In other words, since no adhesive tape or adhesive is used to join the upper container 10 and the lower container 20, the unused container 1 can be used as a raw material for recycling synthetic resin products, so it is not necessary to dispose of it as industrial waste. There is no
Moreover, since the step of adhering the double-sided adhesive tape or the adhesive to the container 1 is unnecessary, the manufacturing efficiency of the container 1 can be improved.

（２）さらに、鍔部１３，２３は、それぞれ側壁１２，２２から外方に張り出しているため、その鍔部１３，２３の所定部位３１，３２を上下方向に圧接するなどの手法により接合し易い。 (2) Further, since the flanges 13, 23 protrude outward from the side walls 12, 22, respectively, the predetermined portions 31, 32 of the flanges 13, 23 are joined by a method such as pressing them vertically. easy.

（３）さらに、圧接する所定部位３１，３２が、容器の各角を形成する角鍔部に設定されており、対角上の角部がそれぞれ接合されるため、最小限の接合により接合強度を高めることができる。 (3) Further, the predetermined parts 31 and 32 to be pressed are set on the corner flanges forming each corner of the container, and the corners on the diagonal are joined, so that the joint strength is minimized. can increase

（４）さらに、容器１は、真空成形または圧空成形により成形されているが、上容器１０および下容器２０を重ねて所定部位３１，３２を接合することにより、剛性を高めることができる。
従って、容器１の運搬時に容器１が変形することにより、物品収容部１６に収容されている物品の収容位置がずれるという事態が発生し難い。
しかも、容器１は、真空成形または圧空成形により成形されているため、軽量化を図ることができる。
さらに、接合により形成された陥没部３０は、下容器２０の鍔部の外面（下面）から突出しているため、ロボットアームが、物品収容部に収容されている物品を探す際に照射する光などが陥没部３０によって遮られるおそれがないので、ロボットアームが部品を探す際の支障が生じるおそれがない。例えば、鍔部１３に平行な光を突出部１４，１４間の空間に照射し、物品収容部１６に物品が照射されているか否かを検索する際に、突出部１４，１４間の鍔部１３から陥没部３０が突出していると、その陥没部３０によって光が遮られるおそれがあるが、陥没部３０は下容器２０の鍔部の下面から突出しているため、そのようなおそれもない。 (4) Furthermore, although the container 1 is formed by vacuum forming or pressure forming, the rigidity can be increased by stacking the upper container 10 and the lower container 20 and joining the predetermined portions 31 and 32 .
Therefore, it is difficult for the container 1 to be deformed during transportation to shift the storage position of the articles stored in the article storage section 16 .
Moreover, since the container 1 is formed by vacuum forming or pressure forming, it is possible to reduce the weight.
Furthermore, since the depressed portion 30 formed by joining protrudes from the outer surface (lower surface) of the brim portion of the lower container 20, the robot arm emits light when searching for an article stored in the article storage section. is not blocked by the recessed part 30, there is no possibility that trouble will occur when the robot arm searches for the part. For example, when irradiating the space between the projecting portions 14 and 14 with light parallel to the flange portion 13 and searching whether or not an article is irradiated to the article storage portion 16, the flange portion between the projecting portions 14 and 14 If the recessed part 30 protrudes from the container 13, the light may be blocked by the recessed part 30, but since the recessed part 30 protrudes from the lower surface of the brim of the lower container 20, there is no such fear.

（５）さらに、相互に重なった容器１単位の切断（多数個取り）および接合を同時に行うことができるため、容器１の製造効率を高めることができる。 (5) Furthermore, since cutting (manufacturing a large number of containers) and jointing of containers 1 that overlap each other can be performed at the same time, the manufacturing efficiency of the containers 1 can be improved.

（６）さらに、第１部材５０は、縦断面が円弧状に凹んだ平面視球面状の圧接面５２を先端に有し、第２部材４０は、縦断面が円弧状に膨らんだ平面視球面状の圧接面４２を先端に有するため、圧接面５２および圧接面４２によって圧縮されて塑性変形した合成樹脂を圧接面５２および圧接面４２の境界よりも外側に逃がすことができる。
つまり、圧縮により陥没した陥没部３０を、その基部３３，３４から外方に広がらせることができるため、上容器１０および下容器２０を接合することができる。 (6) Further, the first member 50 has, at its tip, a pressure contact surface 52 which is spherical in plan view and whose longitudinal cross section is concave in an arc shape, and the second member 40 is a spherical surface in plan view whose longitudinal cross section is convex in an arc shape. Since the pressure contact surface 42 has a shape at the tip, the synthetic resin that has been compressed and plastically deformed by the pressure contact surface 52 and the pressure contact surface 42 can escape to the outside of the boundary between the pressure contact surface 52 and the pressure contact surface 42 .
That is, since the recessed portion 30 which is recessed by compression can be spread outward from the base portions 33 and 34, the upper container 10 and the lower container 20 can be joined.

（７）さらに、下容器２０の鍔部２３は、下容器２０の側壁２２の上縁から外方に張り出しており、かつ、上容器１０の鍔部１３は、上容器１０の側壁１２の上縁から外方に張り出している。さらに、接合部位である所定部位３１，３２は、相互に重なった上容器１０および下容器２０のうち、相互に重なった鍔部１３，２３に設定されており、トムソン刃８２は、相互に重なった鍔部１３，２３の外周縁に沿った形状に形成されている。
従って、切断方向および接合方向を合わせることができるため、切断および接合を同時に行い易い。しかも、切断箇所と接合箇所とが近いため、切断および接合のタイミングを調整し易い。 (7) Further, the flange portion 23 of the lower container 20 protrudes outward from the upper edge of the side wall 22 of the lower container 20, and the flange portion 13 of the upper container 10 is positioned above the side wall 12 of the upper container 10. It protrudes outward from the edge. Further, the predetermined portions 31 and 32 which are joint portions are set at the mutually overlapping flange portions 13 and 23 of the mutually overlapping upper container 10 and lower container 20, and the Thomson blades 82 are mutually overlapped. It is formed in a shape along the outer peripheral edges of the flanges 13 and 23 .
Therefore, since the cutting direction and the joining direction can be matched, cutting and joining can be easily performed at the same time. Moreover, since the cut portion and the joint portion are close to each other, it is easy to adjust the timing of cutting and joining.

（８）上述したように、本発明の容器および容器の接合方法を実施すれば、合成樹脂製品の再生用の原料にすることができ、かつ、製造効率を高めることができる容器および容器の接合方法を提供することができる。 (8) As described above, by carrying out the container and container bonding method of the present invention, the container and container bonding can be used as a raw material for recycling synthetic resin products and can improve the production efficiency. can provide a method.

〈第２実施形態〉
前述した実施形態における第１部材５０および第２部材４０に代えて、図１４（Ａ）に示す第１部材５０および第２部材４０を使用することもできる。第２部材４０の先端には、縦断面がＶ字状で平面視円錐形状に凹んだ圧接面４２が形成されている。第１部材５０には、縦断面がＶ字状で平面視円錐形状に突出しており、圧接面４２と嵌合可能な圧接面５２が形成されている。また、第１部材５０の圧接面４２は、平面視円環状の包囲部５３によって囲まれている。また、包囲部５３の上端の周縁からは、平面視円環状の突出部５４が突出形成されている。
図１４（Ｂ）に示すように、第１部材５０の圧接面５２および第２部材４０の圧接面４２により、圧接対象部位である所定部位３１，３２を両側から圧接すると、同図（Ｃ）に示すように、所定部位３１，３２は塑性変形し、下方に陥没した陥没部３０を形成する。このとき、所定部位３１，３２の圧縮により体積が減少した部分は、外方に逃げ、包囲部５３の内壁面に圧接され、包囲部５３の内部に充填された形状となる。つまり、陥没部３０は、陥没部３０の基部３３，３４から外方に広がった形状となる。換言すると、陥没部３０は、突出部５４および包囲部５３によって形成される内部空間に対応した形状となる。陥没部３０を成形した後は、第２部材４０を上昇させ、容器１を引き上げると、陥没部３０が塑性変形して包囲部５３から離脱する。 <Second embodiment>
The first member 50 and the second member 40 shown in FIG. 14(A) can also be used instead of the first member 50 and the second member 40 in the above-described embodiment. At the tip of the second member 40, there is formed a pressure contact surface 42 which has a V-shaped longitudinal section and is recessed into a conical shape in plan view. The first member 50 has a pressure contact surface 52 that has a V-shaped vertical cross section and protrudes in a conical shape in plan view, and that can be fitted to the pressure contact surface 42 . In addition, the pressure contact surface 42 of the first member 50 is surrounded by an annular surrounding portion 53 in plan view. A projecting portion 54 having an annular shape in a plan view is formed so as to protrude from the peripheral edge of the upper end of the surrounding portion 53 .
As shown in FIG. 14(B), when the pressure contact surface 52 of the first member 50 and the pressure contact surface 42 of the second member 40 press the predetermined portions 31 and 32, which are the pressure contact target portions, from both sides, , the predetermined portions 31 and 32 are plastically deformed to form a depressed portion 30 depressed downward. At this time, the portion whose volume has been reduced due to the compression of the predetermined portions 31 and 32 escapes outward and is pressed against the inner wall surface of the enclosing portion 53 so that the inside of the enclosing portion 53 is filled. That is, the recessed portion 30 has a shape that spreads outward from the bases 33 and 34 of the recessed portion 30 . In other words, the recessed portion 30 has a shape corresponding to the internal space formed by the projecting portion 54 and the surrounding portion 53 . After forming the depressed portion 30 , the second member 40 is lifted to pull up the container 1 , so that the depressed portion 30 is plastically deformed and separated from the surrounding portion 53 .

本実施形態の第１部材５０および第２部材４０を使用すれば、第１部材５０の圧接面５２は、圧接方向（図では下方向）とは逆方向に突出しており、第２部材４０の圧接面４２は、圧接方向（図では下方向）とは逆方向に凹んでいるため、圧接時の応力が、所定部位３１，３２が相互に剥離する方向に集中せず、所定部位３１，３２同士を接合する方向に集中させることができるので、所定部位３１，３２間の接合強度を高めることができる。
なお、圧接面５２を中心として第１部材５０を縦に２分割可能な構造とし、２分割された部分をそれぞれ外方へ移動可能に構成することもできる。この構成を実施すれば、陥没部３０を包囲部５３から容易に離脱させることができるため、容器１を引き上げ易い。 When the first member 50 and the second member 40 of this embodiment are used, the pressure contact surface 52 of the first member 50 protrudes in a direction opposite to the pressure contact direction (downward in the figure), and the second member 40 Since the pressure contact surface 42 is recessed in a direction opposite to the pressure contact direction (downward direction in the drawing), the stress during pressure contact does not concentrate in the direction in which the predetermined portions 31 and 32 separate from each other. Since they can be concentrated in the direction of joining them together, the joining strength between the predetermined parts 31 and 32 can be increased.
In addition, the first member 50 may be vertically divided into two parts centering on the pressure contact surface 52, and the two divided parts may be configured to be movable outward. With this configuration, the depressed portion 30 can be easily separated from the surrounding portion 53, so that the container 1 can be easily pulled up.

〈第３実施形態〉
前述した実施形態における第１部材５０および第２部材４０に代えて、図１５（Ａ）に示す第１部材５０および第２部材４０を使用することもできる。第２部材４０の先端には、平面視円形の圧接面４２が形成されており、第１部材５０には、平面視円形の圧接面５２が形成されている。また、第１部材５０の圧接面４２は、平面視円環状の包囲部５３によって囲まれている。また、包囲部５３の上端の周縁からは、縦断面が円錐台形状のテーパ部５５が形成されており、そのテーパ部５５の上端の周縁には、平面視円環状の突出部５４が形成されている。
図１５（Ｂ）に示すように、第１部材５０の圧接面５２および第２部材４０の圧接面４２により、圧接対象部位である所定部位３１，３２を両側から圧接すると、同図（Ｃ）に示すように、所定部位３１，３２は塑性変形し、下方に陥没した陥没部３０を形成する。このとき、所定部位３１，３２の圧縮により体積が減少した部分は、外方に逃げ、包囲部５３およびテーパ部５５に圧接され、包囲部５３およびテーパ部５５の内部に充填された形状となる。つまり、陥没部３０は、陥没部３０の基部３３，３４から外方に広がった形状となる。換言すると、陥没部３０は、突出部５４、包囲部５３およびテーパ部５５によって形成される内部空間に対応した形状となる。陥没部３０を成形した後は、第２部材４０を上昇させ、容器１を引き上げると、陥没部３０が塑性変形して包囲部５３から離脱する。 <Third Embodiment>
The first member 50 and the second member 40 shown in FIG. 15(A) can also be used instead of the first member 50 and the second member 40 in the above-described embodiment. A pressure contact surface 42 that is circular in plan view is formed at the tip of the second member 40 , and a pressure contact surface 52 that is circular in plan view is formed on the first member 50 . In addition, the pressure contact surface 42 of the first member 50 is surrounded by an annular surrounding portion 53 in plan view. A tapered portion 55 having a truncated conical vertical cross section is formed from the upper edge of the surrounding portion 53 , and a projecting portion 54 having an annular shape in plan view is formed on the upper edge of the tapered portion 55 . ing.
As shown in FIG. 15(B), when the pressure contact surface 52 of the first member 50 and the pressure contact surface 42 of the second member 40 press the predetermined portions 31 and 32 from both sides, the , the predetermined portions 31 and 32 are plastically deformed to form a depressed portion 30 depressed downward. At this time, the portion whose volume is reduced due to the compression of the predetermined portions 31 and 32 escapes outward and is pressed against the enclosing portion 53 and the tapered portion 55 so that the inside of the enclosing portion 53 and the tapered portion 55 is filled. . That is, the recessed portion 30 has a shape that spreads outward from the bases 33 and 34 of the recessed portion 30 . In other words, the recessed portion 30 has a shape corresponding to the internal space formed by the projecting portion 54 , the surrounding portion 53 and the tapered portion 55 . After forming the depressed portion 30 , the second member 40 is lifted to pull up the container 1 , so that the depressed portion 30 is plastically deformed and separated from the surrounding portion 53 .

本実施形態の第１部材５０および第２部材４０を使用すれば、第２部材５０の包囲部５３の上端の周縁からは、縦断面が円錐台形状のテーパ部５５が形成されているため、容器１を引き上げる際に、陥没部３０の外縁部３６，３７が包囲部５３に引っ掛かり難く、テーパ部５５に沿って上方へ移動し易いので、容器１を引き上げ易い。 If the first member 50 and the second member 40 of the present embodiment are used, a tapered portion 55 having a truncated cone-shaped longitudinal section is formed from the peripheral edge of the upper end of the surrounding portion 53 of the second member 50. When the container 1 is pulled up, the outer edges 36 and 37 of the depressed portion 30 are less likely to be caught by the enclosing portion 53 and easily moved upward along the tapered portion 55, so that the container 1 can be easily pulled up.

〈他の実施形態〉
（１）上容器１０および下容器２０の接合部位は、突出部１４，１４（２４，２４）間の平坦部や底壁１１（１２）に設定することもできる。前述の実施形態では、容器の平面方向から見た接合部位の形状が円形であるが、このような形状に代えて、楕円形、長円形等を採用してもよい。
（２）第１部材５０を配置用部材９０に配置し、第２部材４０を切断用部材８０に配置することもできる。 <Other embodiments>
(1) The joining portion of the upper container 10 and the lower container 20 can also be set to the flat portion between the projecting portions 14, 14 (24, 24) or the bottom wall 11 (12). In the above-described embodiment, the shape of the joining portion when viewed from the plane direction of the container is circular.
(2) The first member 50 can be placed on the placement member 90 and the second member 40 can be placed on the cutting member 80 .

（３）第１部材５０および第２部材４０の突出長さを調節する調節構造をそれぞれ切断用部材８０および配置用部材９０に設けることもできる。例えば、第１部材５０および第２部材４０の基部をそれぞれ切断用部材８０および配置用部材９０に螺合する構造とし、第１部材５０および第２部材４０をそれぞれ回転させることにより、突出長さを調節する。
（４）配置用部材９０に載置した容器群の周縁などを配置用部材９０に保持する保持手段を設け、切断する際に接合位置がずれないようにすることもできる。
（５）上容器１０および下容器２０は超音波接合することもできる。
（６）容器群７０はレーザ加工によって容器１単位に切断することもできる。 (3) The cutting member 80 and the positioning member 90 may be provided with adjusting structures for adjusting the projection lengths of the first member 50 and the second member 40, respectively. For example, the bases of the first member 50 and the second member 40 are screwed into the cutting member 80 and the positioning member 90, respectively, and by rotating the first member 50 and the second member 40, respectively, the protrusion length adjust the
(4) It is also possible to provide holding means for holding the periphery of the group of containers placed on the placement member 90 on the placement member 90 so that the joining position does not shift during cutting.
(5) The upper container 10 and the lower container 20 can also be ultrasonically bonded.
(6) The container group 70 can also be cut into individual containers by laser processing.

１容器
１０上容器
１１底壁
１２側壁
１３鍔部
１４，１５突出部
１５ａ外面
１６物品収容部
２０下容器
２１底壁
２２側壁
２３鍔部
２４，２５突出部
２５ａ外面
３０陥没部
３１，３２所定部位
３３，３４基部
４０第２部材
４２圧接面
５０第１部材
５２圧接面
７０容器群
８０切断用部材
８２トムソン刃
９０配置用部材 1 container 10 upper container 11 bottom wall 12 side wall 13 flanges 14, 15 protruding portion 15a outer surface 16 article storage portion 20 lower container 21 bottom wall 22 side wall 23 flanges 24, 25 protruding portion 25a outer surface 30 depressed portions 31, 32 predetermined portion 33, 34 base 40 second member 42 pressure contact surface 50 first member 52 pressure contact surface 70 container group 80 cutting member 82 Thomson blade 90 placement member

Claims

A lower container having an open upper surface and having a bottom wall, a side wall rising from the peripheral edge of the bottom wall, and a brim projecting outward from the side wall is continuously formed by vacuum forming or pressure forming. A synthetic resin lower container group consisting of
It has a bottom wall formed with an article accommodating portion for accommodating an article, a side wall rising from the peripheral edge of the bottom wall, and a brim projecting outward from the side wall, and the upper surface is open. an upper container group made of synthetic resin, the upper container being continuously formed by vacuum forming or pressure forming ;
facing each other, and overlapping each lower container and each upper container facing each other;
The lower container and the upper container that overlap each other in the first step are cut in units of containers that overlap each other, and predetermined portions of the upper container and the lower container that overlap each other are joined to each other. By performing a second step of joining containers that overlap each other,
The second step is
A cutting blade for cutting each of the mutually overlapping lower containers and each of the upper containers by the first step, and a first member for joining the mutually overlapping containers on a container-by-container basis. and a cutting means arranged for each container,
arranging means capable of arranging the upper container group and the lower container group that are superimposed in the first step and having a second member facing the first member;
and a moving means for moving one of the cutting means and the placing means toward the other,
By arranging the upper container group and the lower container group superimposed in the first step on the arranging means and moving one of the cutting means and the arranging means toward the other by the moving means, the arranging means cutting the upper container group and the lower container group arranged in the container into overlapping container units, and pressing the predetermined portions of the mutually overlapping containers from both sides by the first member and the second member, respectively. A method of joining containers, characterized in that it is a step of joining upper and lower containers that are overlapped with each other without using an adhesive tape (including a double-sided adhesive tape) or an adhesive agent.

Each of the first member and the second member has a pressure contact surface at its tip,
The second step is
By pressing both surfaces of the predetermined portion with the pressure contact surfaces of the first member and the second member, the mutually overlapping predetermined portions are depressed in the same direction, and the depressed portions are overlapped with each other. 2. The container according to claim 1, characterized in that the process is a step of projecting from the outer surface of a predetermined portion in a recessed direction, and forming the projecting recessed portion into a shape that spreads outward from the base of the recessed portion. joining method .

3. The method of joining containers according to claim 1, wherein one of said first member and said second member has a recessed pressure contact surface .

The flange of the lower container protrudes outward from the upper edge of the side wall of the lower container, and the flange of the upper container protrudes outward from the upper edge of the side wall of the upper container,
The predetermined portion is set at the overlapping brim portion of the mutually overlapping upper container and lower container,
4. The method of joining containers according to any one of claims 1 to 3 , wherein the cutting blade is formed in a shape along the outer peripheral edges of the mutually overlapping flanges .