JP2011173642A

JP2011173642A - Packaging case

Info

Publication number: JP2011173642A
Application number: JP2010040966A
Authority: JP
Inventors: Kiyoshi Takada; 清高田; Eiji Kodama; 栄司児玉
Original assignee: Mitsubishi Materials Trading Corp
Current assignee: Mitsubishi Materials Trading Corp
Priority date: 2010-02-25
Filing date: 2010-02-25
Publication date: 2011-09-08
Anticipated expiration: 2030-02-25
Also published as: JP5497477B2

Abstract

<P>PROBLEM TO BE SOLVED: To enable the corners of a packaging case assembled into a polyhedral box shape by folding a sheet to be curved and assembled into a good appearance and neat state without damaging its clear appearance. <P>SOLUTION: At parts of a sheet corresponding to the corner portions of a circumferential surface of a case when the sheet is folded and assembled into the case, curved chamfered corners having a curved cross-section is formed, when hot-forming the sheet. The sheet chamfered and curved surface is punched out into a predetermined shape, and at the same time some folding lines are formed in its surface and the sheet is folded along the folding lines and assembled into a box shape. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、化粧品や食品、日用品、タバコその他の物品を収納して販売や展示に供するのに好適なプラスチックシート製の包装用ケースに関する。 The present invention relates to a packaging case made of a plastic sheet suitable for storing cosmetics, foods, daily necessities, cigarettes and other articles for sale and display.

化粧品などの小間物を包装する容器として、透明度の高いプラスチックにより成形されたシートを所定形状に打ち抜き、これをその表面に形成された折り曲げ罫線に沿って折り曲げて六面体に組み立てられるケースが利用されている。
このような包装用ケースは、紙製の容器と比べて剛性が高いため潰れ難く、また、透明なため内容物を外側から確認できるとともに装飾性にも優れており、内容物の保護及び情報の提供の機能の点で紙製の容器よりも利便性が高いといえる。
しかし、紙製の容器が様々な外形状の箱形に成形し易いのに対し、シートをその表面に形成した折り曲げ罫線に沿って略直角に折り曲げて箱形に組み立てられる包装用ケースはデザインの多様性に乏しく、また、周面の直角に折れ曲がった角部が外側へ突出していてケースを持ったとき手触り感も必ずしも良いとは言えない。 As a container for packaging cosmetics and other haberdashery, a case is used in which a sheet formed of a highly transparent plastic is punched into a predetermined shape and then folded along a folding ruled line formed on the surface thereof to be assembled into a hexahedron. .
Such a packaging case is hard to be crushed because it is more rigid than a paper container, and since it is transparent, the contents can be confirmed from the outside, and it has excellent decorative properties. It can be said that it is more convenient than the paper container in terms of the functions provided.
However, while a paper container is easy to be formed into various outer shape box shapes, the packaging case that is assembled into a box shape by folding the sheet substantially at right angles along the folding ruled lines formed on the surface is designed. It is not very diverse, and the corners that are bent at right angles to the peripheral surface protrude outward and the touch is not necessarily good.

そこで、デザインの多様化を図るべく、紙製の箱の成形技術を応用して、周面の角部を所定の曲率半径の円弧曲面に設けて構成した包装用ケースが知られている。
この包装用ケースは、図１４に示されるように、シート表面の湾曲させる角部の部分に罫線刃を圧入して複数（５〜１２本）の折り曲げ罫線を折り曲げる方向に密集配置し、当該角部のシート部分が各折り曲げ罫線に沿って微細な幅で折れ曲がることで、角部が湾曲断面形状をなすように構成したものである（例えば特許文献１参照）。 Therefore, in order to diversify the design, there is known a packaging case in which a corner portion of a peripheral surface is provided on an arc curved surface having a predetermined curvature radius by applying a paper box molding technique.
As shown in FIG. 14, the packaging case is densely arranged in a direction in which a plurality of (5 to 12) folding ruled lines are bent by press-fitting a ruled line blade into a corner part to be curved on the sheet surface. The sheet portion of the portion is bent with a fine width along each folding ruled line so that the corner portion has a curved cross-sectional shape (see, for example, Patent Document 1).

特開２００４−９８５８６号公報JP 2004-98586 A

図１４に示された包装用ケースは、湾曲した角部に複数本の折り曲げ罫線を密集配置してあるためケースのクリア性が損なわれ、見栄えが悪くなるという問題がある。
また、複数の罫線刃をシート表面に同時に押圧して密集した折り曲げ罫線を形成する際、シートの弾性によって折り曲げ罫線の深さにばらつきが生じ、そのため、罫線毎で折れ曲がり易かったり折れ曲がり難かったりし、或いは局部的な折れ曲がりが生じて角部がいびつに変形してしまうこともある。
さらに、一つの角部で５〜１２本も折り曲げ罫線を並設するためシート全体でその表面に形成する折り曲げ罫線は多数に及び、罫線刃を押圧するプレス機もプレス能力が高いものを用いる必要があった。 The packaging case shown in FIG. 14 has a problem that the clearness of the case is impaired and the appearance is deteriorated because a plurality of bent ruled lines are densely arranged at the curved corners.
In addition, when forming a dense folded ruled line by simultaneously pressing a plurality of ruled line blades on the sheet surface, the depth of the folded ruled line varies due to the elasticity of the sheet, so it may be easy to bend or bend easily for each ruled line, Or a local bending may arise and a corner | angular part may deform | transform into an irregular shape.
Furthermore, since 5 to 12 folding ruled lines are arranged in parallel at one corner, there are a large number of folding ruled lines formed on the surface of the entire sheet, and it is necessary to use a press that presses the ruled line blades with high pressing ability. was there.

本発明は従来技術の有するこのような問題点に鑑み、所定形状のシートを折り曲げて多面箱形に組み立てられる包装用ケースの角部を、クリア性を損なわずに見栄え良く綺麗に湾曲させて組み立てることができるようにし、この種の包装用ケースのデザインの多様化に対応できるようにすることを課題とする。 In view of the above-described problems of the prior art, the present invention assembles a corner of a packaging case, which is assembled into a multi-faceted box by folding a sheet of a predetermined shape, nicely and beautifully without losing clearness. It is an object to be able to cope with the diversification of the design of this type of packaging case.

前記課題を解決するため本発明は、所定形状のプラスチックシートをその表面に形成された折り曲げ罫線に沿って折り曲げて多角箱形に組み立てられる包装用ケースにおいて、周側面の各面間の角部のうちの少なくとも一つがプラスチックシートの加熱成形時に設けた湾曲断面の曲面角部であることを特徴とするものである。 In order to solve the above problems, the present invention provides a packaging case in which a plastic sheet having a predetermined shape is folded along a folding ruled line formed on the surface thereof and assembled into a polygonal box shape. At least one of them is a curved corner portion of a curved cross section provided at the time of heat molding of a plastic sheet.

前記の通り、紙箱の成形技術をプラスチックシートの加工に応用し、シート表面に折り曲げ罫線を密集配置してシートを折り曲げたのでは、クリア性が良好であるというプラスチックシートの特性が損なわれ、各罫線で曲がり具合がばらついて綺麗な湾曲面とはなり難く、包装用ケースは実用性に欠けたものとなってしまう。
そこで本発明は、プラスチックシートを加熱成形する際に、ケースに組み立てたときに周側面の角部に対応するシートの部分を湾曲させて成形し、折り曲げ罫線を密集配置しなくとも、角部が湾曲した曲面形状に保形されて折れ曲がるように構成した。これにより、組み立てた包装用ケースは、クリア性を損なうことなく、角部が綺麗な曲面形状に折れ曲がった見栄えの良い特徴的な外観のものとなり、また、角部が湾曲しているのでケースを把持したときの手触り感も良好なものとなる。 As mentioned above, applying the paper box molding technology to the processing of plastic sheets, folding the sheet with the folding ruled lines densely arranged on the surface of the sheet, the characteristics of the plastic sheet with good clearness are impaired, Since the bending of the ruled lines varies, it is difficult to obtain a beautiful curved surface, and the packaging case lacks practicality.
Therefore, in the present invention, when the plastic sheet is heat-molded, the sheet portion corresponding to the corner portion on the peripheral side surface is curved when the plastic sheet is assembled, and the corner portion does not have to be arranged densely. It was configured to be bent and held in a curved shape. As a result, the assembled packaging case has a distinctive appearance with its corners bent into a beautiful curved shape without sacrificing clarity, and the corners are curved. The feel when gripped is also good.

前記構成の包装用ケースにおいて、周側断面がｎ角形の箱形に組み立てられる構成のものである場合、曲面角部はその断面が中心角θ＝（３６０×１／ｎ）の扇形の円弧に略沿うように設けることができる。
例えば、ケースの周側断面が四角形の場合は中心角θ＝９０°の扇形の円弧に、八角形の場合には中心角θ＝４５°の扇形の円弧に沿ってそれぞれ曲面角部を成形することができる。このように曲面角部の湾曲度合い或いは曲率半径をケースの断面形状に対応させれば、曲面角部とこれに連なる側面との境界部分が凹凸のない連続した曲面形状となり、ケースの見栄え及び手触り感がより向上する。 In the packaging case having the above-described configuration, when the circumferential cross-section is configured to be assembled into a box shape having an n-side shape, the curved corner is a fan-shaped arc whose cross-section has a central angle θ = (360 × 1 / n). It can provide so that it may follow along.
For example, a curved corner is formed along a fan-shaped arc having a central angle θ = 90 ° when the circumferential cross section of the case is a square, and along a fan-shaped arc having a central angle θ = 45 ° when the case is an octagon. be able to. If the degree of curvature or the radius of curvature of the curved corner is made to correspond to the cross-sectional shape of the case, the boundary between the curved corner and the side surface connected to the curved corner becomes a continuous curved shape with no irregularities, and the case looks and feels. A feeling improves more.

前記構成の包装用ケースにおいて、曲面角部は、ケース周側面の各面間の一つ又は複数の角部に設け、或いは全ての角部に設けることができる。
また、曲面角部に連なる両面を折れ曲がり易くするため、曲面角部に沿ってその一側に、又は両側に折り曲げ罫線を設けてもよい。 In the packaging case having the above-described configuration, the curved corners can be provided at one or a plurality of corners between the surfaces of the case peripheral side surface, or at all corners.
Moreover, in order to make it easy to bend both surfaces which continue to a curved-surface corner | angular part, you may provide a crease ruled line on the one side or both sides along a curved-surface corner | angular part.

前記構成の包装用ケースは、プラスチックシートの加熱成形時に湾曲断面の曲面角部を形成し、次いでプラスチックシートを所定形状に打ち抜くと同時にその表面に罫線刃を押し当てて折り曲げ罫線を形成し、この所定形状のプラスチックシートを各折り曲げ罫線に沿って折り曲げて多角箱形に組み立てることができる。 The packaging case having the above structure forms a curved corner portion of a curved cross section at the time of heat molding of a plastic sheet, and then punches the plastic sheet into a predetermined shape and simultaneously presses a ruled line blade on the surface to form a bent ruled line. A plastic sheet of a predetermined shape can be folded along each folding ruled line and assembled into a polygonal box shape.

前記構成において、ケースを構成するシートの材質としては、耐折性が良好なポリエチレンテレフタレート、ポリプロピレン、ポリエチレン、ポリカーボネート、或いはポリ乳酸などの生物由来性樹脂、その他の樹脂単体又はこれらの複合体からなる熱可塑性樹脂を用いることができる。特にポリエチレンテレフタレート製のシートは、透明性が良好で剛性が高い点で好ましく、中でもアモルファスＰＥＴ（Ａ−ＰＥＴ）は、より透明性が良好で且つ未延伸であるためシートの方向に関係なく強度が高い点で好ましい。シートの肉厚は、０．１〜０．８ｍｍに設定することができる。０．１ｍｍより薄いと面部の折れ曲がりや破損を来しやすくなり、０．８ｍｍよりも厚いと折り曲げ加工に要する圧力は大となる。耐折性や剛性などを考慮すると、０．２〜０．６ｍｍに設定することが好ましい。 In the above-described configuration, the material of the sheet constituting the case is composed of a bio-derived resin such as polyethylene terephthalate, polypropylene, polyethylene, polycarbonate, or polylactic acid having good folding resistance, other resin alone or a composite thereof. A thermoplastic resin can be used. In particular, a sheet made of polyethylene terephthalate is preferable in terms of good transparency and high rigidity. Among them, amorphous PET (A-PET) is more transparent and unstretched, and therefore has a strength regardless of the direction of the sheet. It is preferable at a high point. The thickness of the sheet can be set to 0.1 to 0.8 mm. If it is thinner than 0.1 mm, the surface portion is likely to bend or break, and if it is thicker than 0.8 mm, the pressure required for bending increases. Considering folding resistance and rigidity, it is preferable to set the thickness to 0.2 to 0.6 mm.

また、ケースは、真空成形や圧空成形、真空・圧空の複合成形、凹凸かしめ成形など適宜な方法を用いて製造することができる。加熱成形時にシートに形成する曲面角部の幅や、その湾曲度合い或いは曲率半径も、ケースの大きさやデザインなどに応じて適宜に設定可能である。また、シートに形成する折り曲げ罫線は、その種類は問わず、ミシン目などのスリットを断続させた罫線や凹穴状の押し罫線、Ｖ字やＵ字状、台形状の溝を断続又は連続させた罫線、溝内を二段溝状とした二段罫線、筋状の溝を平行に近接配置した罫線など、シートを罫線に沿って折り曲げることが可能な適宜な種類の罫線をケースの寸法やシートの材質、剛性、厚みなどに応じて設定することができる。 The case can be manufactured using an appropriate method such as vacuum forming, pressure forming, vacuum / pressure forming, or caulking. The width of the curved corner formed on the sheet at the time of heat forming, the degree of curvature, or the radius of curvature can also be appropriately set according to the size and design of the case. In addition, the folding ruled lines formed on the sheet are not limited to any kind, and the slits such as perforations and the like, the depressed ruled lines, the V-shaped, U-shaped and trapezoidal grooves are intermittently or continuously formed. Appropriate types of ruled lines that can bend sheets along the ruled line, such as ruled lines, two-level ruled lines with a two-step groove inside the groove, and ruled lines in which streak-like grooves are arranged in parallel and close together, It can be set according to the material, rigidity, thickness, etc. of the sheet.

また、包装用ケースは、包装する物品の大きさや形状などに応じて、三角形や四角形、五角形など適宜な外形又は断面形状の多角箱形に形成することができる。ケースは、所定形状に打ち抜かれたシートを折り曲げ、シートの接合端部を固定して組み立てられるが、シートの接合端部を固定するには、シート端部に糊代面を設けておき、これをシートの他端部内面に接合しホットメルト接着剤などで接着したり、シートの接合端部同士を粘着テープやステープラーなどの固定部材で固定したり、或いはシートの端部同士が凹凸係合して固定するように設けたりするなど適宜な固定手段を用いることができる。 Further, the packaging case can be formed in a polygonal box shape having an appropriate outer shape or cross-sectional shape such as a triangle, a quadrangle, or a pentagon according to the size or shape of the article to be packaged. The case is assembled by bending a sheet punched into a predetermined shape and fixing the joining end of the sheet. To fix the joining end of the sheet, a sheeting surface is provided at the end of the sheet. Is bonded to the inner surface of the other end of the sheet and bonded with a hot melt adhesive, or the bonded ends of the sheet are fixed with a fixing member such as an adhesive tape or a stapler, or the ends of the sheet are engaged with each other. For example, an appropriate fixing means can be used, such as providing to fix.

本発明の第１実施形態の包装用ケースの外観図である。It is an external view of the packaging case of the first embodiment of the present invention. 図１のケースを構成するシートの展開図である。It is an expanded view of the sheet | seat which comprises the case of FIG. 図２のＩＩ−ＩＩ線に沿った断面図である。It is sectional drawing along the II-II line of FIG. 図１のケースの横断端面図である。It is a cross-sectional end view of the case of FIG. 本発明の第２実施形態の包装用ケースの（Ａ）閉蓋状態と（Ｂ）開蓋状態の外観図である。It is an external view of (A) closed state and (B) opened state of the packaging case of 2nd Embodiment of this invention. 図５のケースを構成するシートの展開図である。FIG. 6 is a development view of sheets constituting the case of FIG. 5. 図６のＶＩ−ＶＩ線に沿った断面図である。It is sectional drawing along the VI-VI line of FIG. 図５のケースの横断端面図である。FIG. 6 is a transverse end view of the case of FIG. 5. 図６に示したシートの曲面角部の端部及びその周辺部を拡大して示した図である。It is the figure which expanded and showed the edge part and its peripheral part of the curved-surface corner | angular part of the sheet | seat shown in FIG. 曲面角部の端部の周辺部を折り曲げた状態を示した図である。It is the figure which showed the state which bent the peripheral part of the edge part of a curved-surface corner | angular part. 本発明の第３実施形態の包装用ケースの開蓋状態の外観図である。It is an external view of the open state of the packaging case of 3rd Embodiment of this invention. 図１１のケースを構成するシートの展開図である。It is an expanded view of the sheet | seat which comprises the case of FIG. 図１２のＸＩＩ−ＸＩＩ線に沿った切断端面図である。FIG. 13 is a cut end view taken along line XII-XII in FIG. 12. 従来の角部を湾曲させた包装用ケースの外観図である。It is an external view of the case for packaging which curved the conventional corner | angular part.

本発明の好適な実施形態を図面に基づいて説明する。
図１は本発明の第１実施形態の包装用ケースの外観を示しており、このケース１は、所定形状の透明なプラスチックシートを折り曲げて六面箱形に組み立てられており、ケース１の周側面を構成する背面１１、正面１２、左右側面１３、１４の各面間の角部が湾曲した曲面形状を呈するように、各角部に所定の曲率で湾曲した曲面角部１５を各々配置して構成してある。 Preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the appearance of a packaging case according to a first embodiment of the present invention. The case 1 is assembled into a six-sided box by bending a transparent plastic sheet having a predetermined shape. The curved corners 15 that are curved with a predetermined curvature are arranged at the respective corners so that the corners between the rear surface 11, the front surface 12, and the left and right side surfaces 13, 14 constituting the side surface are curved. Configured.

詳しくは、図２は図１のケース１を構成するシートＳ１の展開図であり、このシートＳ１は、各々矩形の板面からなる背面１１、正面１２及び左右側面１３、１４を、当該シートＳ１を加熱成形する際に成形した湾曲した断面形状の曲面角部１５を挟んで連設し、正面１２の上下端部に先端に差し込み片１６ａ、１７ａを有する蓋面１６と底面１７を設け、左右側面１３、１４の上下端部にフラップ１８を各々設け、右側面１４の側端部に曲面角部１５を挟んで糊代面１９を連設するとともに、これら蓋面１６、底面１７の背面１２と差し込み片１６ａ、１７ａとの境界、左右側面１３、１４とフラップ１８との境界、及び右側面１４と糊代面１９との境界に各々折り曲げ罫線Ｌを設け、各罫線Ｌと曲面角部１５に沿って各部が内折れするように形成してある。 Specifically, FIG. 2 is a development view of the sheet S1 constituting the case 1 of FIG. 1. The sheet S1 includes a back surface 11, a front surface 12, and left and right side surfaces 13, 14 each formed of a rectangular plate surface. Are provided with a lid surface 16 and a bottom surface 17 having insertion pieces 16a and 17a at the top and bottom ends of the front surface 12 at the upper and lower ends of the front surface 12, respectively. The flaps 18 are respectively provided on the upper and lower end portions of the side surfaces 13 and 14, and the adhesive margin surface 19 is continuously provided on the side end portion of the right side surface 14 with the curved corner portion 15 interposed therebetween, and the back surface 12 of the lid surface 16 and the bottom surface 17. Bending ruled lines L are provided at the boundaries between the right and left side surfaces 13 and 14 and the flap 18 and at the boundary between the right side surface 14 and the glue margin surface 19, respectively. Each part will fold along It is formed on.

各曲面角部１５は、前記の通りシートＳ１の加熱成形時にケース１を組み立てたときに周側面の角部となるシートの対応位置に予め成形されるものであり、図３に示されるように、中心角θ＝９０°の扇形の円弧に略沿って湾曲した断面形状となるように形成してある。また、ケース１を組み立てる際に曲面角部１５の両側の面が折れ曲がり易くなるように、各曲面角部１５の両側の隣接面との境界に沿って折り曲げ罫線Ｌを形成してある。 As described above, each curved corner 15 is formed in advance at a corresponding position of the sheet that becomes the corner of the peripheral side surface when the case 1 is assembled during the heat forming of the sheet S1, as shown in FIG. The cross section is curved substantially along a fan-shaped arc having a central angle θ = 90 °. Further, when the case 1 is assembled, the folding ruled lines L are formed along the boundary with the adjacent surfaces on both sides of each curved corner 15 so that the surfaces on both sides of the curved corner 15 are easily bent.

このように形成されたシートＳ１は、各曲面角部１５の両側の折り曲げ罫線Ｌに沿って周側各面１１、１２、１３、１４と糊代面１９を折り曲げるとともに、糊代面１９を背面１１の側端部に接着剤などで一体に固着して筒体となし、この筒体の上下の開口に、折り曲げ罫線Ｌに沿って内折れさせたフラップ１８と蓋面１６及び底面１７を折り重ね、両面の差し込み片１６ａ、１７ａを背面１１の上下端部の内側に差し込んで係入させることにより箱形に組み立てられる。
組み立てられたケース１は、周側面の角部が四側面と連続して湾曲した見栄えの良い綺麗な外観のものとなり、また、全ての角部が湾曲しているので周側面に出っ張りがなく、ケース１を持ったときの手触り感も良好なものとなる。 The sheet S1 formed in this way bends the peripheral side surfaces 11, 12, 13, 14 and the glue margin surface 19 along the folding ruled lines L on both sides of each curved corner 15 and the glue margin surface 19 on the back surface. 11 is fixed to the side end of the cylinder 11 with an adhesive or the like to form a cylinder, and the flap 18, the lid surface 16 and the bottom surface 17 are folded inward along the folding ruled line L in the upper and lower openings of the cylinder. By overlapping and inserting the insertion pieces 16a, 17a on both sides inside the upper and lower ends of the back surface 11, the box is assembled.
The assembled case 1 has a beautiful and beautiful appearance with the corners of the peripheral side curved continuously with the four sides, and since all the corners are curved, there is no protrusion on the peripheral side, The touch feeling when holding the case 1 is also good.

図５は本発明の第２実施形態の包装用ケースの外観を示しており、このケース２は、所定形状の透明なプラスチックシートを折り曲げて本体部２１に蓋部２２が開閉自在にヒンジ連結した六面箱形に組み立てられており、前記形態と同様に、ケース２の周側面を構成する各面間の角部が湾曲した曲面形状を呈するように、各角部に所定の曲率で湾曲した曲面角部２３を各々配置して構成してある。 FIG. 5 shows the appearance of a packaging case according to a second embodiment of the present invention. In this case 2, a transparent plastic sheet having a predetermined shape is bent, and a lid 22 is hingedly connected to the main body 21 so as to be opened and closed. It is assembled in a six-sided box shape, and in the same manner as in the above embodiment, each corner is curved with a predetermined curvature so that the corner between the surfaces constituting the peripheral side surface of the case 2 is curved. Each of the curved corner portions 23 is arranged.

詳しくは、図６は図５のケース２を構成するシートＳ２の展開図であり、このシートＳ２は、本体部２１を構成する本体正面２１１、底面２１２、本体背面２１３と蓋部２２を構成する蓋正面２２１、蓋面２２２、蓋背面２２３の各面が折り曲げ罫線Ｌを挟んで連設し、ケース２を組み立てたときに周側面の角部となる前記本体正面２１１、本体背面２１３、蓋正面２２１及び蓋背面２２３の両側に当該シートＳ２を加熱成形する際に成形した湾曲した断面形状の曲面角部２３をそれぞれ設けるとともに、各曲面角部２３の側端部にはケース２の左右側面を構成する内側面２１４、２２４と外側面２１５、２２５をそれぞれ連設し、内側面２１４、２２４の端部に折り曲げ罫線Ｌを挟んでフラップ２１６、２２６をそれぞれ連設し、各罫線Ｌと曲面角部２３に沿って各部が内折れするように形成してある。本体背面２１３と蓋背面２２３の間の折り曲げ罫線Ｌの中央には適宜な幅で切込みを設け、ケース２を組み立てたときに当該罫線Ｌを軸にした蓋部２２の回動操作をさせ易くしてある。 6 is a development view of the sheet S2 constituting the case 2 of FIG. 5, and this sheet S2 constitutes the main body front surface 211, the bottom surface 212, the main body back surface 213, and the lid portion 22 that constitute the main body portion 21. The main body front surface 211, the main body rear surface 213, and the front surface of the cover are formed by connecting the front surface 221, the cover surface 222, and the rear surface 223 of the cover back surface with the folding ruled line L between them. The curved corner portions 23 having a curved cross-sectional shape formed when the sheet S2 is thermoformed are provided on both sides of the cover 221 and the lid rear surface 223, respectively, and the left and right side surfaces of the case 2 are provided at the side ends of the curved corner portions 23. Constructing inner side surfaces 214 and 224 and outer side surfaces 215 and 225 are connected to each other, and flaps 216 and 226 are connected to end portions of the inner side surfaces 214 and 224 with a bent ruled line L interposed therebetween. Each portion along the curved surface angle portion 23 is formed so as to break the inner. A notch with an appropriate width is provided in the center of the folding ruled line L between the main body back surface 213 and the lid back surface 223 so that when the case 2 is assembled, the lid 22 can be easily rotated around the ruled line L. It is.

各曲面角部２３は、前記形態と同様に、シートＳ２の加熱成形時にシートの角部対応位置に予め成形されるものであり、図７に示されるように、中心角θ＝９０°の扇形の円弧に略沿って湾曲した断面形状となるように形成し、その両側の隣接面との境界に沿って折り曲げ罫線Ｌを形成してある。 Each curved corner 23 is formed in advance in a position corresponding to the corner of the sheet S2 when the sheet S2 is heat-formed, as shown in FIG. 7, and as shown in FIG. 7, a sector having a central angle θ = 90 °. The bent ruled line L is formed along the boundary with the adjacent surfaces on both sides thereof.

なお、図９に示されるように、各曲面角部２３の端部を、湾曲面を横断する堤部２３ａを設けて当該帯状に延びた湾曲面を塞いだ形状とし、図１０に示されるように、ケース２を組み立てる際に底面２１２又は蓋面２２２の湾曲した角部が堤部２３ａの内側に進入して収まり、底面２１２と蓋面２２２の四隅角部がケース２の外側に露出しないように設けてもよい。 As shown in FIG. 9, the end of each curved corner 23 is shaped to provide a bank 23a that crosses the curved surface and closes the curved surface extending in the band shape, as shown in FIG. In addition, when the case 2 is assembled, the curved corners of the bottom surface 212 or the cover surface 222 enter the inside of the bank portion 23a so that the four corners of the bottom surface 212 and the cover surface 222 are not exposed to the outside of the case 2. May be provided.

このように形成されたシートＳ２は、各折り曲げ罫線Ｌに沿って各部を内折れし、本体部２１の内側面２１４の外側に外側面２１５を、蓋部２２の内側面２２４の外側に外側面２２５をそれぞれ接合し、接合面同士を接着剤などで一体に固着することにより箱形に組み立てられる。
組み立てられたケース２は、本体部２１の上端に連結した蓋部２２を開閉してケース２に包装した物品を出し入れすることができ、また、閉蓋状態でケース２は周側面の角部が湾曲した見栄えの良い六面箱形となり、ケース２を持ったときの手触り感も良好なものとなる。 The sheet S2 formed in this manner is internally folded along each folding ruled line L, the outer surface 215 is outside the inner surface 214 of the main body 21, and the outer surface is outside the inner surface 224 of the lid 22. Each of the 225 is joined, and the joining surfaces are integrally fixed with an adhesive or the like to be assembled into a box shape.
The assembled case 2 can open and close the lid portion 22 connected to the upper end of the main body portion 21 to allow the article packaged in the case 2 to be taken in and out. It has a curved six-sided box shape, and the touch feeling when holding the case 2 is also good.

図１１は本発明の第３実施形態の包装用ケースの外観を示しており、このケース３は、前記第２実施形態のケース２に後述するカラー部２４を一体に設けてタバコを包装する容器として利用できるように構成したものである。 FIG. 11 shows the appearance of a packaging case according to a third embodiment of the present invention. This case 3 is a container for packaging cigarettes by integrally providing a collar portion 24, which will be described later, on the case 2 of the second embodiment. It can be used as

詳しくは、図１２は図１１のケース３を構成するシートＳ３の展開図であり、このシートＳ３は、前記シートＳ２と同様に、ケース３の本体部２を構成する本体正面２１１、底面２１２、本体背面２１３、蓋部２２を構成する蓋正面２２１、蓋面２２２、蓋背面２２３、ケース３の周側面の角部対応位置に設けたシートＳ３を加熱成形する際に成形した湾曲した断面形状の曲面角部２３、及びケース３の左右側面を構成する内外側面２１４、２１５、２２４、２２５の各面を折り曲げ罫線Ｌを挟んで内折れ可能に連設し、さらに本体部２の端部にカラー部２４を一体に連設して形成してある。 Specifically, FIG. 12 is a development view of the sheet S3 constituting the case 3 of FIG. 11, and the sheet S3, like the sheet S2, is a main body front surface 211, a bottom surface 212, and a main body portion 2 of the case 3. The main body rear surface 213, the lid front surface 221, the lid surface 222, the lid rear surface 223 constituting the lid portion 22, and the curved cross-sectional shape formed when the sheet S3 provided at the corner corresponding position on the peripheral side surface of the case 3 is thermoformed. The curved corner portion 23 and the inner and outer surfaces 214, 215, 224, and 225 constituting the left and right side surfaces of the case 3 are continuously connected so as to be able to be folded inward with the folding ruled line L in between. The portion 24 is formed integrally and continuously.

カラー部２４は、本体部２１の本体正面２１に連なるそのカラー正面２４１の中央を大きく切り欠き、このカラー正面２４１と本体部２１の外側面２１５、２１５に連なるカラー側面２４２、２４２との間に、シートＳ３を加熱成形する際に成形した曲面角部２３ａ、２３ａを配置するとともに、図１３に示されるように、本体部２１とカラー部２４との間にシートＳ３の肉厚ｔ分の段差を設けて本体部２１の端部に連設させてある。カラー部２４の段差は、シートＳ３をプレス成形する際にラウンド加工と同時に設けることができる。
曲面角部２３ａは、曲面角部２３と同様の曲率で湾曲し且つその曲率半径ｒが曲面角部２３の曲率半径ＲよりもシートＳ３の肉厚ｔ分だけ少ない大きさ（ｒ＝Ｒ−ｔ）に設定されており、その両側にはカラー正面２４１とカラー側面２４２との境界に沿って折曲げ罫線Ｌを形成してある。また、本体部２１の曲面角部２３との間には、シートＳ３を折り曲げる際に本体部２１とカラー部２４が曲面角部２３、２３ａに沿って湾曲するように長孔２４３を形成してある。長孔２４３は、カラー部２４側に設けても曲面角部２３、２３ａに沿ってシートＳ３を湾曲させることが可能であり、また、長孔２４３の代わりに細い切込みを形成してもよい。
また、カラー正面２４１の両側には、曲面角部２３ａと平行に形成された切込みによってケース３を組み立てたときに僅かな幅で側方へ突出し、本体部２１に被せた蓋部２２に内面に弾圧接して蓋部２２を閉蓋状態に保持する係止片２４４、２４４を設けてある。 The collar portion 24 is largely cut out at the center of the collar front surface 241 connected to the main body front surface 21 of the main body portion 21, and between the color front surface 241 and the color side surfaces 242 and 242 continuous to the outer side surfaces 215 and 215 of the main body portion 21. The curved corners 23a, 23a formed when the sheet S3 is heat-molded are arranged, and as shown in FIG. 13, a step corresponding to the thickness t of the sheet S3 is provided between the main body 21 and the collar part 24. Are provided continuously to the end of the main body 21. The step of the collar portion 24 can be provided simultaneously with the round processing when the sheet S3 is press-molded.
The curved corner portion 23a is curved with the same curvature as the curved corner portion 23, and the radius r of curvature is smaller than the curvature radius R of the curved corner portion 23 by the thickness t of the sheet S3 (r = R−t). ), And a crease ruled line L is formed on both sides along the boundary between the collar front surface 241 and the color side surface 242. Further, a long hole 243 is formed between the main body 21 and the curved corner 23 so that the main body 21 and the collar 24 are curved along the curved corners 23 and 23a when the sheet S3 is folded. is there. Even if the long hole 243 is provided on the collar part 24 side, the sheet S3 can be curved along the curved corners 23 and 23a, and a thin cut may be formed instead of the long hole 243.
Further, on the both sides of the collar front surface 241, when the case 3 is assembled by a notch formed in parallel with the curved corner portion 23a, the case 3 protrudes to the side with a slight width, and the lid portion 22 that covers the main body portion 21 has an inner surface. Locking pieces 244 and 244 for holding the lid portion 22 in a closed state by elastic contact are provided.

このように形成されたシートＳ３は、前記第２実施形態と同様に、各折り曲げ罫線Ｌに沿って各部を内折れし、本体部２１の内側面２１４の外側に外側面２１５を、蓋部２２の内側面２２４の外側に外側面２２５をそれぞれ接合し、接合面同士を接着剤などで一体に固着することにより箱形に組み立てられる。
組み立てられたケース３は、周側面の角部が湾曲した見栄えの良い六面箱形になるとともに、本体部２１の本体正面２１１の上端から突出したカラー部２４が前記段差によって当該本体正面２１１よりもシートＳ３の肉厚ｔ分だけケース内方へ凹んだ面に沿った配置となり、本体部２１に蓋部２２を被せるとカラー部２４の外面に蓋部２２の内面が接合して蓋部２２は本体部２１に面一に支持され、閉蓋状態でケース３を持ったときの手触り感がより向上する。また、閉蓋状態ではカラー部２４の係止片２４４、２４４が蓋部２２の内面に弾圧接して蓋部２２を閉蓋位置に保持されるため、蓋部２２が妄りに開くことはない。 Similarly to the second embodiment, the sheet S3 formed in this manner is internally folded along each folding ruled line L, and the outer surface 215 is disposed outside the inner surface 214 of the main body portion 21, and the lid portion 22. The outer side surfaces 225 are joined to the outside of the inner side surface 224, and the joint surfaces are integrally fixed with an adhesive or the like to be assembled into a box shape.
The assembled case 3 has a good-looking six-sided box shape with curved corners on the peripheral side surface, and the collar portion 24 projecting from the upper end of the main body front surface 211 of the main body portion 21 is more than the main body front surface 211 due to the step. Also, the sheet S3 is arranged along the surface recessed inward of the case by the thickness t, and when the main body 21 is covered with the lid portion 22, the inner surface of the lid portion 22 is joined to the outer surface of the collar portion 24. Is supported flush with the main body 21 and the touch feeling when holding the case 3 in the closed state is further improved. Further, in the closed state, the locking pieces 244 and 244 of the collar portion 24 are elastically brought into contact with the inner surface of the lid portion 22 to hold the lid portion 22 in the closed position, so that the lid portion 22 does not open unreasonably.

なお、図示したケースは本発明の実施形態の一例を示すものであり、本発明の包装用ケースはこれに限定されず、収納する物品の大きさや形状、包装の態様などに応じて適宜な形態で構成することが可能である。 The illustrated case shows an example of the embodiment of the present invention, and the packaging case of the present invention is not limited to this, and an appropriate form according to the size and shape of the article to be stored, the packaging mode, etc. Can be configured.

１，２，３ケース、１１背面、１２正面、１３左側面、１４右側面、１５曲面角部、１６蓋面、１７底面、１８フラップ、２１本体部、２１１本体正面、２１２底面、２１３本体背面、２１４内側面、２１５外側面、２１６フラップ、２２蓋部、２２１蓋正面面、２２２蓋面、２２３蓋背面、２２４内側面、２２５外側面、２２６フラップ、２３，２３ａ曲面角部、２４カラー部、２４１カラー正面、２４２カラー側面、２４３長孔、２４４係止片、Ｓ１，Ｓ２，Ｓ３シート、Ｌ折り曲げ罫線

1, 2, 3 Case, 11 Back, 12 Front, 13 Left Side, 14 Right Side, 15 Curved Corner, 16 Cover Surface, 17 Bottom, 18 Flap, 21 Body, 211 Body Front, 212 Bottom, 213 Body Back , 214 inner surface, 215 outer surface, 216 flap, 22 lid, 221 lid front surface, 222 lid surface, 223 lid back surface, 224 inner surface, 225 outer surface, 226 flap, 23, 23a curved corner, 24 color portion 241 color front surface, 242 color side surface, 243 long hole, 244 locking piece, S1, S2, S3 sheet, L folding ruled line

Claims

所定形状のプラスチックシートをその表面に形成された折り曲げ罫線に沿って折り曲げて多角箱形に組み立てられる包装用ケースにおいて、
周側面の各面間の角部のうちの少なくとも一つがプラスチックシートの加熱成形時に設けた湾曲断面の曲面角部であることを特徴する包装用ケース。 In a packaging case in which a plastic sheet of a predetermined shape is folded along a folding ruled line formed on its surface and assembled into a polygonal box shape,
A packaging case, wherein at least one of the corner portions between the peripheral surfaces is a curved corner portion having a curved cross section provided at the time of heat forming the plastic sheet.

周側断面がｎ角形の箱形に組み立てられる請求項１に記載の包装用ケースにおいて、曲面角部はその断面が、中心角θ＝（３６０×１／ｎ）の扇形の円弧に略沿うように設けられていることを特徴とする包装用ケース。 The packaging case according to claim 1, wherein the circumferential cross section is assembled into a box shape having an n-sided cross section, so that the cross-section of the curved corner is substantially along a fan-shaped arc having a central angle θ = (360 x 1 / n). A packaging case provided on the packaging.

周側面の各面間の角部の全てが曲面角部であるあることを特徴とする請求項２に記載の包装用ケース。 The packaging case according to claim 2, wherein all of the corners between the peripheral side surfaces are curved corners.

曲面角部の一側又は両側に罫線が設けられていることを特徴とする請求項１〜３の何れかに記載の包装用ケース。 The packaging case according to any one of claims 1 to 3, wherein a ruled line is provided on one side or both sides of the curved corner.

プラスチックシートの加熱成形時に湾曲断面の曲面角部を形成し、次いでプラスチックシートを所定形状に打ち抜くと同時にその表面に罫線刃を押し当てて折り曲げ罫線を形成し、この所定形状のプラスチックシートを各折り曲げ罫線に沿って折り曲げて多角箱形に組み立てられることを特徴とする請求項１〜４の何れかに記載の包装用ケース。 When the plastic sheet is heat-formed, a curved corner of a curved cross section is formed, and then the plastic sheet is punched into a predetermined shape, and at the same time, a ruled line blade is pressed against the surface to form a bent ruled line. The packaging case according to claim 1, wherein the packaging case is folded along a ruled line and assembled into a polygonal box shape.