JP7345609B2 - food packaging - Google Patents

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JP7345609B2
JP7345609B2 JP2022126172A JP2022126172A JP7345609B2 JP 7345609 B2 JP7345609 B2 JP 7345609B2 JP 2022126172 A JP2022126172 A JP 2022126172A JP 2022126172 A JP2022126172 A JP 2022126172A JP 7345609 B2 JP7345609 B2 JP 7345609B2
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sheet
food
opening
packaging material
food packaging
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JP2022145799A (en
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知毅 神谷
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Howa Sangyo Co Ltd
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Description

本発明は、食品用包装材により包装された食品包装体に関する。 The present invention relates to a food package packaged with a food packaging material.

正面形状が三角形状(主として正三角形状)あるいはこれに類似する形状で、所定の厚みを有する立体形状に仕上げられた三角おにぎり等の米飯加工食品等の食品を包装するための食品用包装材は、幅方向の中央部に長手方向に沿ってカットテープが設けられる矩形状の外シートと、カットテープに沿って内端部同士が重ね合わせられ、シート状食品を挟んで外シートに重ね合わせられる一対の内シートとを備え、シート状食品を囲むように外シートと内シートとが接合される形態が一般的である。 Food packaging materials for packaging foods such as processed rice foods such as triangular rice balls that have a triangular (mainly equilateral triangular) or similar shape from the front and are finished in a three-dimensional shape with a predetermined thickness. , a rectangular outer sheet in which a cut tape is provided along the longitudinal direction in the center of the width direction, and the inner edges are overlapped along the cut tape, and the sheet food is sandwiched between the rectangular outer sheets and the outer sheet. A typical configuration includes a pair of inner sheets, and the outer sheet and the inner sheet are joined so as to surround the sheet-shaped food product.

かかる食品用包装材は、食品を挟んで長手方向に二つ折りにし、両側の余分なシート片を中心側に折って三角形状ないし略三角形状にし、折った部分をポイントシールしたり、ラベルを貼付する工程を経て、食品を包装するものである。 Such food packaging materials are made by folding the food in half in the longitudinal direction, folding the excess sheet pieces on both sides toward the center to form a triangular or nearly triangular shape, and attaching point stickers or labels to the folded portions. Foods are packaged after going through a process of

開封に際しては、食品包装体の頂部に設けられた摘み部を摘んでカットテープを縦回りに引き回し、外シートを長手方向に開裂した後、分断された一対の包装体片をそれぞれ側方へ引っ張ることにより、食品をシート状食品と一体化させた状態で取り出し、食品を食する。 To open the package, pick the tab provided at the top of the food package, pull the cut tape vertically, tear the outer sheet in the longitudinal direction, and then pull the separated pair of package pieces to the sides. As a result, the food is taken out in a state where it is integrated with the sheet-like food, and the food is eaten.

ここで、外シートの開裂手段として、一対のカットテープを用いることにより、カットテープによる開裂開口を幅広に形成して、外シートとシート状食品との接触面積を少なくし、分断された一対の包装体片を円滑に食品から引き抜き、取り除くことができるようにした食品用包装材が知られている(特許文献1及び2)。 Here, by using a pair of cut tapes as a means for tearing the outer sheet, the tear opening made by the cut tape is formed wide, reducing the contact area between the outer sheet and the sheet-shaped food, and the separated pair of cut tapes are made wide. BACKGROUND ART A food packaging material is known that allows a package piece to be smoothly pulled out and removed from a food product (Patent Documents 1 and 2).

また、食品包装体の背面の上半分は、食品用包装材の両側の余分なシート片が折り重ねられていることもあって、肉厚になっていることに対し、当該箇所における開封性を得るために、一端側の両端側部に鋸歯状の易破断部を設けた食品用包装材も知られている(特許文献2)。 In addition, the upper half of the back of the food package is thick due to the extra sheet pieces on both sides of the food packaging material being folded over, so it is difficult to open the seal at that part. There is also known a food packaging material in which sawtooth-like breakable portions are provided on both end sides of one end in order to obtain the desired results (Patent Document 2).

特許3398355号公報Patent No. 3398355 特許3377969号公報Patent No. 3377969

しかし、食品包装体の背面の上半分は、シートが幾重にも重なって相当に肉厚である。しかも、当該箇所にはラベルも貼着されるため、さらに厚みが増す。また、折り重ねられた両側のシート片の縁部(食品用包装材の一端側の両端側部)と交わる一対のカットテープの部分は、ある程度離間しているため、カットテープを引っ張ってシート片の縁部を破断しようとする際に、大きな抵抗がかかる。したがって、易破断部を設けているといえども、カットテープがシート片の縁部を破断できず、開封が困難となることが起こり得る。 However, the upper half of the back surface of the food package is made up of multiple sheets and is quite thick. Moreover, since a label is also attached to the area, the thickness increases further. In addition, since the parts of the pair of cut tapes that intersect with the edges of the folded sheet pieces on both sides (both end sides of one end of the food packaging material) are separated by a certain distance, the cut tapes can be pulled to separate the sheet pieces. When trying to break the edges of Therefore, even though the easy-to-break portion is provided, the cut tape may not be able to break the edge of the sheet piece, making opening difficult.

また、易破断部を介してシート片の縁部を破断できたとしても、カットテープには大きな引っ張り力がかかっており、この力が外方に作用した場合、破断ラインがカットテープから脱線して左右に膨らんでいくといういわゆる開封ずれが生じ、適切でない開封状態となってしまうことが起こり得る。 Furthermore, even if the edge of the sheet piece can be broken through the easy-to-break part, a large tensile force is applied to the cut tape, and if this force is applied outward, the break line may derail from the cut tape. A so-called unsealing deviation occurs in which the packaging bulges from side to side, resulting in an inappropriate unsealing condition.

そこで、本発明は、かかる事情に鑑みてなされたもので、外シートの開裂手段として一対の開封用条体を用いて幅広開封(ワイド開封)を実現する上で、背面の上半分のシートが重なって厚みのある部分を好適に開封することができる食品包装体を提供することを課題とする。 Therefore, the present invention has been made in view of the above circumstances, and in realizing wide opening (wide opening) using a pair of opening strips as means for tearing the outer sheet, the upper half of the back sheet is It is an object of the present invention to provide a food package whose overlapping and thick parts can be opened suitably.

発明者は、鋭意研究を重ねた結果、易破断部の形状を好適なものにすれば、上記課題を解決することを突き止めた。それは以下のとおりである。 As a result of extensive research, the inventor found that the above problem can be solved by making the shape of the easily breakable part suitable. It is as follows.

本発明に係る食品包装体は、
長手方向の一端から他端にかけて一対の開封用条体を有して幅方向に分離可能な長方形状ないし略長方形状の外シートと、シート状食品を挟んで外シートに重ね合わせられ、外シートと同方向に分離可能な内シートとを備え、シート状食品を囲むように外シートと内シートとが接合され、一端側の両側端部のそれぞれに、開封用条体のそれぞれに対応して鋸歯状の易破断部を備える食品用包装材を用い、食品を挟んで長手方向に二つ折りにすること及び両側の余分なシート片を中心側に折ることによって、食品が三角形状ないし略三角形状に包装された食品包装体において、
易破断部の各谷部の幅方向外方の斜辺と、易破断部と交わる部分における開封用条体の接線との交差角は、10度以上25度以下であり、
易破断部の各谷部の幅方向内方の斜辺と接線との交差角は、易破断部の各谷部の角度から易破断部の各谷部の幅方向外方の斜辺と接線との交差角を引いた角度であって、易破断部の各谷部の幅方向外方の斜辺と接線との交差角よりも大きく、65度以上である。
The food package according to the present invention includes:
A rectangular or substantially rectangular outer sheet having a pair of strips for opening from one longitudinal end to the other end and separable in the width direction; and an inner sheet that can be separated in the same direction, the outer sheet and the inner sheet are joined so as to surround the sheet food, and the outer sheet and the inner sheet are joined to each other so as to surround the sheet food, and each of the two ends of one end is provided with a strip corresponding to each opening strip. By using a food packaging material with serrated easy-to-break parts and folding the food in half in the longitudinal direction and folding the extra sheet pieces on both sides towards the center, the food can be shaped into a triangular or nearly triangular shape. In a food package packaged in
The intersection angle between the outer oblique side in the width direction of each valley of the easily breakable part and the tangent to the opening strip at the part where it intersects with the easily breakable part is 10 degrees or more and 25 degrees or less,
The intersection angle between the widthwise inner hypotenuse of each valley of the easy-to-break part and the tangent line is calculated from the angle of each valley in the easy-to-break part to the intersection between the widthwise outer hypotenuse and the tangent of each valley of the easy-to-break part. This is the angle obtained by subtracting the intersection angle, which is greater than the intersection angle between the outer oblique side in the width direction of each valley of the easily breakable portion and the tangent, and is 65 degrees or more.

ここで、本発明に係る食品包装体の一態様として、
一対の開封用条体は、長手方向の一端から他端にかけて波形でかつ互いに交差するように配置される
構成を採用することができる。
Here, as one aspect of the food package according to the present invention,
The pair of unsealing strips may be arranged in a waveform from one end to the other end in the longitudinal direction and intersect with each other.

また、本発明に係る食品包装体の別の態様として、
一対の開封用条体は、所定幅を有して長手方向に沿って平行に配置される
構成を採用することができる。
Moreover, as another aspect of the food package according to the present invention,
The pair of opening strips may have a predetermined width and be arranged in parallel along the longitudinal direction.

さらに、本発明に係る食品包装体の他の態様として、
一端側の両角部のそれぞれに、切欠部を備え、
易破断部は、切欠部と隣接して設けられる
構成を採用することができる。
Furthermore, as another aspect of the food package according to the present invention,
A notch is provided on each of both corners of one end,
The easily breakable portion may be provided adjacent to the cutout portion.

以上の如く、本発明に係る食品包装体によれば、外シートの開裂手段として一対の開封用条体を用いて幅広開封(ワイド開封)を実現する上で、背面の上半分のシートが重なって厚みのある部分を好適に開封することができる。 As described above, according to the food packaging body of the present invention, in realizing wide opening (wide opening) using a pair of opening strips as means for tearing the outer sheet, the upper half of the sheets on the back surface overlap. The thick part can be opened conveniently.

図1は、本発明の第一の実施形態に係る食品用包装材の分解斜視図である。FIG. 1 is an exploded perspective view of a food packaging material according to a first embodiment of the present invention. 図2は、同食品用包装材の正面図である。FIG. 2 is a front view of the food packaging material. 図3は、同食品用包装材の背面図である。FIG. 3 is a rear view of the food packaging material. 図4は、同食品用包装材の製造過程において複数の食品用包装材が個別に分離される前の繋がった状態の原反の一部の正面図である。FIG. 4 is a front view of a part of the raw fabric in a connected state before a plurality of food packaging materials are separated into individual food packaging materials in the manufacturing process of the same food packaging material. 図5(a)は、個別に分離された食品用包装材の一端側の正面図であり、図5(b)は、その角部を切り落として切欠部及び易破断部を形成した状態の正面図である。FIG. 5(a) is a front view of one end side of the individually separated food packaging material, and FIG. 5(b) is a front view of the food packaging material with its corner cut off to form a notch and an easily broken part. It is a diagram. 図6(a)ないし(c)は、同食品用包装材を用いて食品を包装する過程の説明図である。FIGS. 6(a) to 6(c) are explanatory views of the process of packaging food using the same food packaging material. 図7(a)ないし(c)は、図6の続きの説明図である。FIGS. 7A to 7C are explanatory diagrams continued from FIG. 6. 図8(a)は、同食品用包装材により包装された食品包装体を斜め前方から見た斜視図であり、図8(b)は、同食品包装体を斜め後方から見た斜視図である。FIG. 8(a) is a perspective view of a food package packaged with the same food packaging material, viewed diagonally from the front, and FIG. 8(b) is a perspective view of the same food package, viewed diagonally from the rear. be. 図9(a)は、同食品包装体の正面図であり、図9(b)は、同食品包装体の背面図である。FIG. 9(a) is a front view of the food package, and FIG. 9(b) is a rear view of the food package. 図10(a)ないし(c)は、同食品包装体を開封する過程の説明図である。FIGS. 10(a) to 10(c) are explanatory views of the process of opening the food package. 図11(a)ないし(d)は、同食品包装体の背面の易破断部あたりの拡大図であって、それぞれ易破断部の凸部の角度形状が異なるものを示す。FIGS. 11(a) to 11(d) are enlarged views of the easy-to-break part on the back side of the same food package, each showing a different angular shape of the convex part of the easy-to-break part. 図12は、本発明の第二の実施形態に係る食品用包装材の正面図である。FIG. 12 is a front view of a food packaging material according to a second embodiment of the present invention. 図13(a)ないし(c)は、同食品用包装材により包装された食品包装体の背面の易破断部あたりの拡大図であって、それぞれ易破断部の凸部の角度形状が異なるものを示す。FIGS. 13(a) to (c) are enlarged views of the easy-to-break part on the back side of a food package packaged with the same food packaging material, and the angular shapes of the convex parts of the easy-to-break part are different from each other. shows. 図14(a)は、本発明の別の実施形態に係る食品用包装材の一端側の正面図であり、図14(b)は、本発明のさらに別の実施形態に係る食品用包装材の一端側の正面図である。FIG. 14(a) is a front view of one end side of a food packaging material according to another embodiment of the present invention, and FIG. 14(b) is a front view of a food packaging material according to yet another embodiment of the present invention. It is a front view of one end side.

<第一の実施形態>
以下、本発明の第一の実施形態として、三角おにぎりの包装に用いられる食品用包装材及びこの食品用包装材により包装された食品包装体について、図1ないし図11を参酌して説明する。
<First embodiment>
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As a first embodiment of the present invention, a food packaging material used for packaging triangular rice balls and a food package packaged with this food packaging material will be described below with reference to FIGS. 1 to 11.

図1ないし図3に示す如く、本実施形態に係る食品用包装材1は、互いに直交する方向の一方が他方よりも長い形状を有する一対のシート(外シート2、内シート3)が、三角おにぎりに巻く海苔等のシート状食品4を挟んで重ね合わせられ、シート状食品4を囲むようにして、長手方向の一端10a側及び他端10b側の端部接合部11,11と両側部の側部接合部12,12により四方が封止された本体10を備える。なお、以下では、上記一方(図2及び図3では、上下方向)を「長手方向」といい、上記他方(図2及び図3では、左右方向)を「幅方向」という。 As shown in FIGS. 1 to 3, the food packaging material 1 according to the present embodiment has a pair of sheets (outer sheet 2, inner sheet 3) each having a shape that is longer than the other in a direction perpendicular to each other. They are overlapped with a sheet-like food 4 such as seaweed wrapped around a rice ball sandwiched between them, so as to surround the sheet-like food 4, and the end joints 11, 11 on one longitudinal end 10a side and the other end 10b side, and the side portions on both sides. It includes a main body 10 sealed on all sides by joints 12, 12. Note that, hereinafter, one of the directions (the vertical direction in FIGS. 2 and 3) will be referred to as the "longitudinal direction", and the other direction (the horizontal direction in FIGS. 2 and 3) will be referred to as the "width direction".

外シート2は、ポリエチレンやポリプロピレン等の熱溶着性を有するプラスチックシートからなり、長手方向に二つ折りにした状態で食品を包み込める大きさの矩形状ないし略矩形状(長方形状ないし略長方形状)を有する。 The outer sheet 2 is made of a heat-fusible plastic sheet such as polyethylene or polypropylene, and has a rectangular or substantially rectangular shape (rectangular or substantially rectangular) large enough to wrap food when folded in half in the longitudinal direction. have

内シート3も、ポリエチレンやポリプロピレン等の熱溶着性を有するプラスチックシートからなり、長手方向に二つ折りにした状態で食品を包み込める大きさの矩形状ないし略矩形状(長方形状ないし略長方形状)を有する。また、内シート3は、長手方向に沿って内端部同士が重ね合わせられた一対の内シート3,3からなり、内端部同士が重ね合わせられた状態の大きさが外シート2と同じ大きさである。本実施形態においては、内シート3,3の内端部同士の重ね合わせ部30は、内シート3の幅方向の中央部に設けられる。 The inner sheet 3 is also made of a heat-fusible plastic sheet such as polyethylene or polypropylene, and has a rectangular or substantially rectangular shape (rectangular or substantially rectangular) large enough to wrap food when folded in half in the longitudinal direction. have In addition, the inner sheet 3 consists of a pair of inner sheets 3, 3 whose inner ends are overlapped along the longitudinal direction, and the size when the inner ends are overlapped is the same as the outer sheet 2. It's the size. In this embodiment, the overlapping portion 30 between the inner ends of the inner sheets 3 is provided at the center of the inner sheet 3 in the width direction.

端部接合部11は、内シート3,3の内端部同士の重ね合わせ部30を除き、外シート2及び内シート3の一端10a及び他端10bに沿って外シート2及び内シート3をヒートシールすることにより形成される。側部接合部12は、外シート2及び内シート3の側縁に沿って外シート2及び内シート3をヒートシールすることにより形成される。なお、本実施形態においては、側部接合部12には、幅方向に通気可能なように連通部12aが長手方向に適宜間隔で設けられ、側部接合部12は、連通部12aによって複数に分割された形態となる。 The end joint part 11 connects the outer sheet 2 and the inner sheet 3 along one end 10a and the other end 10b of the outer sheet 2 and the inner sheet 3, except for the overlapping part 30 between the inner ends of the inner sheets 3 and 3. Formed by heat sealing. The side joint portion 12 is formed by heat-sealing the outer sheet 2 and the inner sheet 3 along the side edges of the outer sheet 2 and the inner sheet 3. In addition, in this embodiment, the side joint part 12 is provided with communication parts 12a at appropriate intervals in the longitudinal direction so as to allow ventilation in the width direction, and the side joint part 12 is provided with a plurality of communication parts 12a by the communication parts 12a. It becomes a divided form.

このようにして構成された本体10の内部がシート状食品4の収容部となるが、外シート2の一端10aには、幅方向に所定間隔を有して離間する一対の切込線20,20が形成される。切込線20は、全切線、半切線(ハーフカット)、ミシン目等によって形成され、切込線20の形成によって開封起点としての摘み部21が形成される。そして、摘み部21から外シート2の他端10bにかけて、帯状又は線状の開封用条体5が設けられる。開封用条体5は、例えば、外シート2の内面に貼着されるカットテープや糸等である。これにより、摘み部21を引き下ろすことにより、開封用条体5が所定の幅で外シート2を破断し、外シート2が幅方向(左右)に分離(分割)可能となる。本実施形態においては、開封用条体5は、外シート2の幅方向の中央部に設けられ、内シート3,3の内端部の重ね合わせ部30と重なる。 The interior of the main body 10 configured in this manner serves as a housing portion for the sheet food 4, and one end 10a of the outer sheet 2 has a pair of cut lines 20 spaced apart at a predetermined interval in the width direction. 20 is formed. The cut line 20 is formed by a full cut line, a half cut line, a perforation, etc., and the formation of the cut line 20 forms a knob 21 as an opening point. A band-shaped or linear opening strip 5 is provided from the knob 21 to the other end 10b of the outer sheet 2. The opening strip 5 is, for example, a cut tape or thread that is attached to the inner surface of the outer sheet 2. Thereby, by pulling down the knob 21, the opening strip 5 breaks the outer sheet 2 at a predetermined width, and the outer sheet 2 can be separated (divided) in the width direction (left and right). In this embodiment, the unsealing strip 5 is provided at the center of the outer sheet 2 in the width direction, and overlaps with the overlapping portion 30 of the inner ends of the inner sheets 3 .

また、開封用条体5は、一対設けられ、外シート2の一端10aから他端10bにかけて、二つの波が形成されるよう、長手方向(本実施形態においては、外シート2の幅方向の中心線)に対して蛇行した形で、外シート2に全長に亘って貼着される。そして、一対の開封用条体5,5が長手方向(本実施形態においては、外シート2の幅方向の中心線)に対して線対称に設けられることで、外シート2の一端10aから他端10bにかけて、二箇所で交差して第一交点及び第二交点が設けられるとともに、一端10aと第一交点との間に、第一幅広部が形成され、第一交点と第二交点との間に、第二幅広部が形成される。本実施形態においては、開封用条体5,5は、外シート2の一端10aから他端10bにかけて、小さい波と大きい波の二つの波が形成されるように外シート2に貼着され、これにより、第一幅広部よりも第二幅広部の方が、幅が広く、長手方向における長さが長くなっている。 Further, a pair of opening strips 5 are provided so that two waves are formed from one end 10a of the outer sheet 2 to the other end 10b in the longitudinal direction (in the present embodiment, in the width direction of the outer sheet 2). It is attached to the outer sheet 2 over its entire length in a meandering shape with respect to the center line). The pair of unsealing strips 5, 5 are provided line-symmetrically with respect to the longitudinal direction (in the present embodiment, the center line in the width direction of the outer sheet 2), so that from one end 10a of the outer sheet 2 to the other A first intersection point and a second intersection point are provided by intersecting at two points toward the end 10b, and a first wide portion is formed between the one end 10a and the first intersection point, and a first wide portion is formed between the first intersection point and the second intersection point. A second wide portion is formed in between. In this embodiment, the opening strips 5, 5 are attached to the outer sheet 2 so that two waves, a small wave and a large wave, are formed from one end 10a of the outer sheet 2 to the other end 10b, As a result, the second wide portion is wider and longer in the longitudinal direction than the first wide portion.

なお、図4に示す如く、この種の食品用包装材1は、量産性の観点から、外シート2及び内シート3の長尺原反を包装材製造装置に供給し、搬送しながら、搬送過程で種々の工程(開封用条体5,5の貼着工程、内シート3,3の重ね合わせ工程、外シート2及び内シート3,3の重ね合わせ工程、接合部11,12の形成工程等)が加えられて、連続的に製造される。そこで、開封用条体5,5も、外シート2の長尺原反に応じて長尺なものが用いられ、外シート2の長尺原反の搬送に伴い、外シート2の幅方向の中心線を中心として、左右交互に蛇行しつつ波形に貼着される。より詳しくは、開封用条体5,5は、互いに交差しながら小さい波と大きい波を1ピッチとして繰り返すようにして、外シート2の長尺原反の幅方向の中心線に沿って貼着される。そして、切断予定線CLに沿って食品用包装材1,1間を幅方向に切断することで、複数の食品用包装材1,…が個別に分離され、これに伴い、開封用条体5,5も切断予定線に沿って切断される。 As shown in FIG. 4, from the viewpoint of mass production, this type of food packaging material 1 is manufactured by supplying the long original sheets of the outer sheet 2 and the inner sheet 3 to a packaging material manufacturing device and transporting them. Various steps are carried out during the process (attachment of opening strips 5, 5, stacking of inner sheets 3, 3, stacking of outer sheet 2 and inner sheets 3, 3, formation of joints 11, 12) etc.) are added and manufactured continuously. Therefore, the strips 5, 5 for opening are also long in accordance with the long raw material of the outer sheet 2, and as the long raw material of the outer sheet 2 is conveyed, the length of the strips 5, 5 in the width direction of the outer sheet 2 is It is pasted in a wavy pattern, meandering alternately left and right around the center line. More specifically, the opening strips 5, 5 are pasted along the center line in the width direction of the long original fabric of the outer sheet 2, crossing each other and repeating small waves and large waves as one pitch. be done. Then, by cutting the food packaging materials 1, 1 in the width direction along the cutting line CL, the plurality of food packaging materials 1, ... are individually separated, and along with this, the opening strip 5 , 5 are also cut along the planned cutting line.

したがって、図1ないし図3に戻り、開封用条体5,5の一端の間隔及び接線と、他端の間隔及び接線とは、一致し、食品用包装材1の一端10aと他端10bとを一致させると、開封用条体5,5の一端と他端とは連続した状態となる。 Therefore, returning to FIGS. 1 to 3, the distance and tangent between one end of the opening strips 5, 5 and the distance and tangent between the other end are the same, and the one end 10a and the other end 10b of the food packaging material 1 are the same. When they match, one end and the other end of the opening strips 5, 5 become continuous.

食品用包装材1(本体10)の四隅の角部には、切欠部13が形成される。切欠部13は、食品用包装材1を用いて食品を包装する際の、両側の余分なシート片の一部を切欠部13により無くすことにより、両側の余分なシート片を中心側に折って三角形状ないし略三角形状にするにあたり、シート片の重なりを少なくするためのものである。 Notches 13 are formed at the four corners of the food packaging material 1 (main body 10). The cutout portion 13 is formed by eliminating some of the excess sheet pieces on both sides when packaging food using the food packaging material 1, thereby folding the excess sheet pieces on both sides toward the center. This is to reduce overlapping of the sheet pieces when forming the sheet into a triangular or substantially triangular shape.

図5に示す如く、切欠部13は、食品用包装材1の一端10a又は他端10bから長手方向に沿って所定長さ延びる第一の外形線13aと、第一の外形線13aの終端を始端として食品用包装材1の側縁に延びる第二の外形線13bとで構成される。本実施形態においては、第一の外形線13aは、長手方向と平行な直線であり、第二の外形線13bは、食品用包装材1の側縁に対して鋭角(例えば30ないし60度)に交わる直線の斜線である。 As shown in FIG. 5, the notch 13 includes a first outline 13a extending a predetermined length from one end 10a or the other end 10b of the food packaging material 1 along the longitudinal direction, and a terminal end of the first outline 13a. It is constituted by a second outline line 13b extending to the side edge of the food packaging material 1 as a starting end. In this embodiment, the first outline line 13a is a straight line parallel to the longitudinal direction, and the second outline line 13b is at an acute angle (for example, 30 to 60 degrees) with respect to the side edge of the food packaging material 1. It is a straight diagonal line that intersects with .

切欠部13と食品用包装材1の側縁とが交わる部分(第二の外形線13bの終端)から食品用包装材1の側縁の所定範囲にかけては、食品用包装材1の側縁に沿って鋸歯状の易破断部14が形成される。すなわち、食品用包装材1の一端10a側の両側端部には、切欠部13と隣接して易破断部14が形成される。易破断部14は、各開封用条体5に対応して設けられ、易破断部14から幅方向に食品用包装材1を破断しやすくするためのものである。 From the intersection of the notch 13 and the side edge of the food packaging material 1 (the end of the second outline 13b) to a predetermined range of the side edge of the food packaging material 1, the side edge of the food packaging material 1 is A serrated easily breakable portion 14 is formed along the line. That is, easy-to-break portions 14 are formed adjacent to the cutout portions 13 at both end portions of the food packaging material 1 on the one end 10a side. The easy-to-break part 14 is provided corresponding to each strip 5 for opening, and is for making it easy to break the food packaging material 1 from the easy-to-break part 14 in the width direction.

易破断部14は、同一形状の三角形状の凸部が横並びとなることで同一形状の山及び谷が連続する鋸歯状に形成される。また、易破断部14は、各凸部の先端(三角形の頂点)を通る線が食品用包装材1の側縁よりも幅方向内方にオフセットするように形成される。そこで、切欠部13及び易破断部14は、上述した食品用包装材1の分離工程後、あるいは分離工程と同時に、図5(a)に示すハッチング領域を打ち抜くことで、同時に形成される。もちろん、切欠部13と易破断部14とを別々に形成するようにしてもよい。 The easily breakable portion 14 is formed into a sawtooth shape in which triangular convex portions having the same shape are arranged side by side, so that peaks and valleys having the same shape are continuous. Furthermore, the easily breakable portion 14 is formed such that a line passing through the tip of each convex portion (vertex of the triangle) is offset inward in the width direction from the side edge of the food packaging material 1. Therefore, the cutout portion 13 and the easy-to-break portion 14 are simultaneously formed by punching out the hatched area shown in FIG. 5(a) after or simultaneously with the separation step of the food packaging material 1 described above. Of course, the cutout portion 13 and the easily breakable portion 14 may be formed separately.

本実施形態に係る食品用包装材1は、以上の構成からなり、次に、この食品用包装材1を用いた食品の包装方法について説明する。 The food packaging material 1 according to the present embodiment has the above configuration. Next, a method of packaging food using this food packaging material 1 will be described.

まず、図6(a)に示す如く、食品用包装材1の内シート3の上に三角おにぎり6を載せる。このとき、三角おにぎり6が内フィルム3,3の重ね合わせ部30の上に左右均等に載り、かつ、三角おにぎり6の一つの角部が食品用包装材1の一端10a側の摘み部21に向くように三角おにぎり6を配置する。 First, as shown in FIG. 6(a), a triangular rice ball 6 is placed on the inner sheet 3 of the food packaging material 1. At this time, the triangular rice ball 6 is placed evenly on the left and right sides on the overlapping portion 30 of the inner films 3, 3, and one corner of the triangular rice ball 6 is placed on the knob 21 on the one end 10a side of the food packaging material 1. Arrange the triangular rice balls 6 so that they face each other.

次に、同図(b)に示す如く、食品用包装材1を、一端10a側とこれに対向する他端10b側を合わせるように長手方向に二つ折りにし、折った側の部分は、三角おにぎり6の側面(三角形状の斜面)にも沿うように折る。これにより、食品用包装材1の長手方向の一端10a側半分が三角おにぎり6の正面を覆い、他端10b側半分が三角おにぎり6の背面を覆うとともに、食品用包装材1の両側(左右)のシート片16,16が食品用包装材1の一端10aと他端10bの位置がずれた状態となって余る。 Next, as shown in FIG. 2(b), the food packaging material 1 is folded in half in the longitudinal direction so that the one end 10a side and the opposite end 10b side are aligned, and the folded side is shaped like a triangle. Fold it along the side of rice ball 6 (triangular slope). As a result, one half of the food packaging material 1 in the longitudinal direction on the one end 10a side covers the front side of the triangular rice ball 6, and the other end 10b side half covers the back side of the triangular rice ball 6, and both sides (left and right) of the food packaging material 1 The sheet pieces 16, 16 of the food packaging material 1 remain in a state where the positions of one end 10a and the other end 10b are shifted.

そこで、同図(c)に示す如く、両側のいずれか一方の余分なシート片16を折って、食品用包装材1の、三角おにぎり6の背面を覆っている部分の上に重ね、その上に、図7(a)に示す如く、他方の余分なシート片16を折って、食品用包装材1の、三角おにぎり6の背面を覆っている部分の上に重ねて、三角形状ないし略三角形状にする。 Therefore, as shown in the same figure (c), fold the extra sheet piece 16 on either side and overlap it on the part of the food packaging material 1 that covers the back of the triangular rice ball 6. Next, as shown in FIG. 7(a), fold the other excess sheet piece 16 and place it over the part of the food packaging material 1 that covers the back of the triangular rice ball 6 to form a triangular or approximately triangular shape. Make it into shape.

このとき、食品用包装材1の両側端部の易破断部14,14のそれぞれ最も一端10a側の端部同士、より詳しくは、それぞれ最も一端10a側に位置する三角形状の凸部14a,14a同士が重なるように、食品用包装材1の両側のシート片16,16を折る。なお、食品用包装材1で包装すると、両側端部の易破断部14,14のそれぞれ最も一端10a側の端部同士が自然に重なるようになるのが、三角おにぎり6の標準的な厚み(奥行方向の幅)である。 At this time, the ends of the easy-to-break portions 14, 14 at both ends of the food packaging material 1 that are closest to the one end 10a, more specifically, the triangular convex portions 14a, 14a that are located closest to the one end 10a, respectively. Fold the sheet pieces 16, 16 on both sides of the food packaging material 1 so that they overlap. Note that when the food packaging material 1 is used to package the triangular rice ball 6, the standard thickness of the triangular rice ball 6 ( width in the depth direction).

そして、同図(b)に示す如く、両側の余分なシート片16,16の、切欠部13によって互いに重なっていないそれぞれの部分を、食品用包装材1の、三角おにぎり6の背面を覆っている部分にポイントシール等により接合し(接合部18)、食品用包装材1を、三角おにぎり6を包み込んだ状態に固定する。そして、同図(c)に示す如く、その上に、ラベル8を貼付する。なお、接合部の形状は図示のような円形状に限らず、長円形状、楕円形状、多角形状、線状等の種々の形状とすることができ、接合部の数も、二箇所に限らず、三箇所以上としたり、幅方向に長い大きな接合部を一箇所施すようにしてもよい。 Then, as shown in FIG. 2B, the portions of the extra sheet pieces 16 on both sides that do not overlap each other due to the notch 13 are covered with the back surface of the triangular rice ball 6 of the food packaging material 1. The food packaging material 1 is fixed in a state where the triangular rice ball 6 is wrapped around the food packaging material 1 by joining with a point seal or the like (joint part 18). Then, as shown in FIG. 2C, a label 8 is attached thereon. Note that the shape of the joint is not limited to the circular shape as shown in the figure, but can be various shapes such as an ellipse, an ellipse, a polygon, a line, and the number of joints is limited to two. First, there may be three or more joints, or there may be one large joint that is long in the width direction.

これにより、食品包装体は一応完成する。しかし、略三角形状のそれぞれ角部には、複数枚のシート(本実施形態においては、外シート2のシートが四枚、内シート3のシートが四枚、合計八枚のシート)が重なって扁平状となった耳片17が形成され、各耳片17は、耳片17の突出方向の軸回りに余分なシート片が折り畳まれただけである。折り畳まれているので、基本的には開口は生じていないが、折り畳みが不十分であったり、折り畳まれたシートの弾発力により、開口が生じる可能性は否定できない。そして、これにより、食品包装体の内外が連通した状態となり、ここから異物等が混入する余地が残る。そこで、さらなる工程として、耳片17に封止部17aが形成される。 As a result, the food package is temporarily completed. However, a plurality of sheets (in this embodiment, four sheets of outer sheet 2 and four sheets of inner sheet 3, for a total of eight sheets) overlap each corner of the approximately triangular shape. A flattened lug 17 is formed, and each lug 17 is simply an extra sheet piece folded around an axis in the protruding direction of the lug 17. Since the sheets are folded, basically no openings occur, but the possibility of openings occurring due to insufficient folding or the elastic force of the folded sheet cannot be denied. As a result, the inside and outside of the food package are in communication with each other, leaving room for foreign matter to enter. Therefore, as a further step, a sealing portion 17a is formed on the ear piece 17.

最後に、図8(a)及び図9(a)に示す如く、食品包装体の正面に、ラベル7を貼付する。このラベル7は、商品名、おにぎりの中味(具材)、価格、商品のイメージ画像等を表示する印刷がラベル基材の表面に施され、食品包装体が店頭に陳列される際に正面側となる部分に貼着される商品表示ラベルである。これに対し、食品包装体の背面に貼付されるラベル8は、商品名、原材料名、消費期限、製造者等の商品情報を表示する印刷がラベル基材の表面に施された品質表示ラベルである。 Finally, as shown in FIGS. 8(a) and 9(a), a label 7 is attached to the front of the food package. This label 7 is printed on the surface of the label base material to display the product name, contents (ingredients) of the rice ball, price, image of the product, etc., and is placed on the front side when the food package is displayed in a store. This is a product display label that is affixed to the area. On the other hand, the label 8 affixed to the back of the food package is a quality display label with printing on the surface of the label base material that displays product information such as the product name, raw material name, expiration date, and manufacturer. be.

なお、ラベル7の上縁(すなわち、ラベル7の縁部のうち、開封用条体5,5による開封起点側に位置する縁部、本実施形態においては、ラベル7は、矩形状ないし略矩形状なので、上辺)及びラベル8の下縁(すなわち、ラベル8の縁部のうち、開封用条体5,5による開封起点側に位置する縁部、本実施形態においては、ラベル8は、矩形状ないし略矩形状なので、下辺)には、開封方向(長手方向)と交差する幅方向に所定間隔を有して並列する複数の切込線からなる易破断部70,80が形成される。これは、ラベル7及び8が開封用条体5,5の一部の上に貼着され、開封用条体5,5による開封の抵抗となるところ、開封用条体5,5がラベル7及び8を破断できるようにしてできるだけ開封の抵抗を少なくするためのものである。 Note that the upper edge of the label 7 (that is, the edge of the label 7 located on the opening starting point side by the opening strips 5, 5; in this embodiment, the label 7 is rectangular or approximately rectangular). In this embodiment, the label 8 has a rectangular shape. Since the shape is substantially rectangular, easily breakable parts 70 and 80 are formed on the lower side, which are made up of a plurality of score lines arranged in parallel at predetermined intervals in the width direction intersecting the opening direction (longitudinal direction). This is because the labels 7 and 8 are pasted on a part of the opening strips 5 and 5, and the opening strips 5 and 5 provide resistance to opening, and the opening strips 5 and 5 are attached to the label 7. and 8 can be broken to reduce opening resistance as much as possible.

三角おにぎり6を食する際には、図10(a)及び(b)に示す如く、摘み部21を摘んで開封用条体5,5を縦回りに引き回し、外シート2を長手方向に開裂する。この際、開封用条体5,5は、互いに間隔を有する二本のカットテープからなるので、幅広の開裂開口を形成することができる。これにより、外シート2を分断後、外シート2とシート状食品4との接触面積が少なくなる。そして、同図(c)に示す如く、分断された一対の包装体片をそれぞれ側方へ引っ張ることにより、三角おにぎり6をシート状食品4と一体化させた状態で取り出すことができる。 When eating the triangular rice ball 6, as shown in FIGS. 10(a) and 10(b), pinch the knob 21, pull the opening strips 5, 5 vertically, and tear the outer sheet 2 in the longitudinal direction. do. At this time, since the strips 5, 5 for opening are made up of two cut tapes having an interval from each other, a wide tearing opening can be formed. Thereby, after dividing the outer sheet 2, the contact area between the outer sheet 2 and the sheet-shaped food product 4 is reduced. Then, as shown in FIG. 4(c), by pulling the pair of separated packaging pieces to the sides, the triangular rice ball 6 can be taken out in a state where it is integrated with the sheet-shaped food product 4.

ここで、本実施形態の特徴について説明する。 Here, the features of this embodiment will be explained.

本発明者は、易破断部14の谷部の角度を開封用条体5の外方と内方とでどのように振り分ければ、易破断部14が効果的に作用するかを検証した。その結果、本発明者は、易破断部14の各谷部の幅方向外方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ1を小さくし(45度以下、あるいは35度以下、あるいは30度以下)、他方の斜辺、すなわち、易破断部14の各谷部の幅方向内方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ2を交差角θ1よりも大きくすると、易破断部14が効果的に作用することがわかった。その上で、本発明者は、図11に示す如く、易破断部14の各谷部の幅方向外方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ1は、10度以上、あるいは15度以上であって、25度以下、あるいは20度以下の範囲となるように、設定する(以下、「構成1」という。)のが好ましく、また、他方の斜辺、すなわち、易破断部14の各谷部の幅方向内方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ2は、65度以上、あるいは70度以上であって、80度以下、あるいは75度以下の範囲となるように、設定する(以下、「構成2」という。)のが好ましいことを知得するに至った。 The present inventor examined how to distribute the angles of the troughs of the easy-to-break portion 14 between the outside and the inside of the unsealing strip 5 so that the easy-to-break portion 14 would work effectively. As a result, the present inventor found that the intersection angle θ1 between the widthwise outer oblique side (side edge) of each valley of the easily breakable portion 14 and the tangent T of the opening strip 5 at the intersection with the easily breakable portion 14 (45 degrees or less, or 35 degrees or less, or 30 degrees or less), and the other oblique side, that is, the inner oblique side (side edge) in the width direction of each valley of the easy-to-break part 14, and the easy-to-break part 14 It has been found that the easy-to-break portion 14 works effectively when the intersection angle θ2 between the tangent T and the opening strip 5 is made larger than the intersection angle θ1. In addition, as shown in FIG. 11, the present inventor discovered that the widthwise outer oblique side (side edge) of each valley of the easily breakable portion 14 and the opening strip 5 at the portion that intersects with the easily breakable portion 14. The intersection angle θ1 with the tangent T is set to be in the range of 10 degrees or more, or 15 degrees or more, and 25 degrees or less, or 20 degrees or less (hereinafter referred to as "configuration 1"). Preferably, the other oblique side, that is, the widthwise inner oblique side (side edge) of each valley of the easily breakable portion 14 intersects with the tangent T of the opening strip 5 at the portion where it intersects with the easily breakable portion 14. Learn that it is preferable to set the angle θ2 to be in the range of 65 degrees or more, or 70 degrees or more, and 80 degrees or less, or 75 degrees or less (hereinafter referred to as "Configuration 2"). reached.

構成1、すなわち、易破断部14の幅方向外方の斜辺と開封用条体5の接線Tとの交差角θ1を小さくすることで、開封用条体5の引っ張り力が作用する方向と易破断部14の幅方向外方の斜辺との角度差が小さくなるため、易破断部14の谷底からのシート片の破断が円滑に行われ、また、構成2の角度よりも構成1の角度を小さくすることで、開封用条体5の引っ張り力は、外方に作用しにくく、内方に作用する傾向となるため、破断ラインが開封用条体5から外れて外方に膨らんでいく開封ずれは起こりにくい。 Configuration 1, that is, by reducing the intersection angle θ1 between the outer oblique side in the width direction of the easy-to-break part 14 and the tangent T of the opening strip 5, the direction in which the tensile force of the opening strip 5 acts can be easily adjusted. Since the difference in angle with the outer oblique side of the breakable portion 14 in the width direction is smaller, the sheet piece can be broken from the bottom of the easily breakable portion 14 more smoothly, and the angle of configuration 1 is smaller than the angle of configuration 2. By making the opening strip 5 smaller, the tensile force of the opening strip 5 is less likely to act outwards and tends to act inward, which causes the tear line to deviate from the opening strip 5 and bulge outward. Misalignment is unlikely.

かかる構成の食品包装体により、外シート2の開裂手段として一対の開封用条体5,5を用いて幅広開封(ワイド開封)を実現する上で、背面の上半分のシートが重なって厚みのある部分を好適に開封することができるようになる。 With the food packaging body having such a structure, when wide opening is achieved by using the pair of opening strips 5, 5 as tearing means for the outer sheet 2, the upper half of the sheets on the back overlap and the thickness is reduced. It becomes possible to open a certain part suitably.

<第二の実施形態>
次に、本発明の第二の実施形態において、図12及び図13を参酌して説明する。なお、第一の実施形態との違いは、一対の開封用条体5,5の形態と易破断部14,14の形態のみであり、その他の構成は同じなので、同じ構成についての説明は省略する。
<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. 12 and 13. Note that the only difference from the first embodiment is the form of the pair of opening strips 5, 5 and the form of the easily breakable parts 14, 14, and the other configurations are the same, so a description of the same configuration will be omitted. do.

一対の開封用条体5,5は、図12に示す如く、所定幅を有して長手方向に沿って平行に配置される。その間隔は、第一の実施形態における一対の開封用条体5,5の最大幅と同程度とされる。 As shown in FIG. 12, the pair of opening strips 5, 5 have a predetermined width and are arranged in parallel along the longitudinal direction. The interval is approximately the same as the maximum width of the pair of opening strips 5, 5 in the first embodiment.

また、易破断部14の形態としては、易破断部14の各谷部の幅方向外方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ1を小さくし(45度以下、あるいは35度以下、あるいは30度以下)、他方の斜辺、すなわち、易破断部14の各谷部の幅方向内方の斜辺(側縁)を、易破断部14と交わる部分における開封用条体5の接線Tと平行ないし略平行とする。その上で、図13に示す如く、易破断部14の各谷部の幅方向外方の斜辺(側縁)と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角θ1は、25度以上であって、35度以下の範囲となるように、設定する(以下、「構成3」という。)のが好ましく、また、他方の斜辺、すなわち、易破断部の各谷部の幅方向内方の斜辺(側縁)は、易破断部14と交わる部分における開封用条体5の接線Tと平行ないし略平行とする(以下、「構成4」という。)のが好ましい。なお、交差角θ1は、小さくなり過ぎると、易破断部14の鋸歯のピッチが小さくなって凸部の数が増えて、易破断部14の機能が損なわれかねないので、一定の角度以上は必要である。この点は、第一の実施形態の交差角θ1も同様である。 Furthermore, the shape of the easily breakable portion 14 is such that the widthwise outer oblique side (side edge) of each valley of the easily breakable portion 14 and the tangent T of the opening strip 5 at the intersection with the easily breakable portion 14 are defined. The intersection angle θ1 is made small (45 degrees or less, or 35 degrees or less, or 30 degrees or less), and the other oblique side, that is, the inner oblique side (side edge) in the width direction of each valley of the easily breakable portion 14 is easily It is parallel or substantially parallel to the tangent line T of the opening strip 5 at the part where it intersects with the breaking part 14 . Then, as shown in FIG. 13, the intersection of the oblique side (side edge) on the outer side in the width direction of each valley of the easily breakable part 14 and the tangent T of the opening strip 5 at the part where it intersects with the easily breakable part 14. The angle θ1 is preferably set in a range of 25 degrees or more and 35 degrees or less (hereinafter referred to as "configuration 3"). The inner oblique side (side edge) in the width direction of the trough is parallel or substantially parallel to the tangent T of the opening strip 5 at the part where it intersects with the easily breakable part 14 (hereinafter referred to as "Configuration 4"). preferable. Note that if the intersection angle θ1 becomes too small, the pitch of the sawtooth of the easily breakable portion 14 will become small and the number of convex portions will increase, which may impair the function of the easily breakable portion 14. is necessary. This point also applies to the intersection angle θ1 of the first embodiment.

かかる構成によっても、第一の実施形態と同様、構成3により、開封用条体5の引っ張り力が作用する方向と易破断部14の幅方向外方の斜辺との角度差が小さくなるため、易破断部14の谷底からのシート片の破断が円滑に行われ、また、構成3及び構成4により、開封用条体5の引っ張り力は、外方に作用しにくく、内方に作用する傾向となるため、破断ラインが開封用条体5から外れて外方に膨らんでいく開封ずれは起こりにくくなり、よって、外シート2の開裂手段として一対の開封用条体5,5を用いて幅広開封(ワイド開封)を実現する上で、背面の上半分のシートが重なって厚みのある部分を好適に開封することができるようになる。 With such a configuration, as in the first embodiment, the angular difference between the direction in which the tensile force of the unsealing strip 5 acts and the outer oblique side in the width direction of the easy-to-break portion 14 becomes small. The breakage of the sheet piece from the bottom of the easy-to-break part 14 is performed smoothly, and due to configurations 3 and 4, the tensile force of the opening strip 5 does not tend to act outwardly, but tends to act inwardly. As a result, opening deviation in which the tearing line deviates from the opening strip 5 and bulges outward becomes less likely to occur. In order to achieve opening (wide opening), it becomes possible to suitably open the thick part of the upper half of the back where the sheets overlap.

なお、本発明に係る食品用包装材及び食品包装体は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変更が可能である。 Note that the food packaging material and food packaging body according to the present invention are not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

例えば、上記第一の実施形態においては、図11において、交差角θ1と交差角θ2の組み合わせとして、四つの形態を挙げた。しかし、交差角θ1と交差角θ2は、それぞれの角度範囲において独立して任意の値に設定することができる。 For example, in the first embodiment described above, four forms are listed as combinations of the intersection angle θ1 and the intersection angle θ2 in FIG. 11. However, the crossing angle θ1 and the crossing angle θ2 can be independently set to arbitrary values in each angle range.

また、上記第一の実施形態においては、易破断部14の谷の角度(すなわち、交差角θ1と交差角θ2の和)は90度に設定した。しかし、易破断部14の谷の角度は適宜の値に設定することができる。 Further, in the first embodiment, the angle of the valley of the easily breakable portion 14 (that is, the sum of the crossing angle θ1 and the crossing angle θ2) is set to 90 degrees. However, the angle of the valley of the easily breakable portion 14 can be set to an appropriate value.

また、上記第一の実施形態の易破断部14の形態は、上記第二の実施形態の開封用条体5,5の形態との組み合わせで用いることができるし、逆に、上記第二の実施形態の易破断部14の形態は、上記第一の実施形態の開封用条体5,5の形態との組み合わせで用いることができる。 Further, the form of the easy-to-break part 14 of the first embodiment can be used in combination with the form of the opening strips 5, 5 of the second embodiment, or conversely, The form of the easy-to-break part 14 of the embodiment can be used in combination with the form of the opening strips 5, 5 of the first embodiment.

また、上記実施形態においては、易破断部14は、各凸部の先端を通る線が食品用包装材1の側縁よりも幅方向内方にオフセットするように形成された。これは、易破断部14を打ち抜き加工して形成する際に、抜きクズがばらばらにならないようにするためである。しかし、易破断部14の形態は種々のものを採用することができる。例えば、図14に示す如く、易破断部14は、各凸部の先端を通る線が食品用包装材1の側縁と一致した、幅方向内方にオフセットされないものであってもよい。 Further, in the embodiment described above, the easily breakable portion 14 is formed such that a line passing through the tip of each convex portion is offset inward in the width direction from the side edge of the food packaging material 1. This is to prevent the punched pieces from falling apart when forming the easily breakable portion 14 by punching. However, various forms of the easily breakable portion 14 can be adopted. For example, as shown in FIG. 14, the easily breakable portion 14 may be such that a line passing through the tip of each convex portion coincides with the side edge of the food packaging material 1 and is not offset inward in the width direction.

また、上記実施形態においては、内シート3は、内端部同士が重ね合わせられた一対のシートからなるものであった。しかし、内シートは、一枚のシートからなり、ミシン目やハーフカット等を設けることによって、幅方向に分離可能なものや、一対のシートを内端部同士を重ね合わせることなく配置するとともに、両内端部を覆うように帯状のシートを設けたものや、内シート3の一方のシートの内端部に帯状シートを設けて二股状に形成し、この二股部に他方のシートの内端部を挿入して内シート3の内外の気密性を高めたものや、さらには他方のシートの内端部にも帯状シートを設けて二股状に形成し、一方のシートの二股部と他方のシートの二股部の合計4枚のシートが交互に重なり合うようにして内シート3の内外の気密性をさらに高めたもの等、種々の形態のものを採用することができる。 Further, in the embodiment described above, the inner sheet 3 is composed of a pair of sheets whose inner ends are overlapped with each other. However, the inner sheet may be made of a single sheet and can be separated in the width direction by providing perforations or half cuts, or a pair of sheets may be arranged without overlapping their inner edges. A belt-shaped sheet is provided to cover both inner ends, or a belt-shaped sheet is provided to the inner end of one of the inner sheets 3 to form a bifurcated shape, and the inner end of the other sheet is attached to this bifurcated part. In some cases, the inner sheet 3 is made to have a bifurcated shape by inserting a strip to improve the airtightness inside and outside of the inner sheet 3. Furthermore, a belt-like sheet is also provided at the inner end of the other sheet to form a bifurcated shape, and the bifurcated portion of one sheet is connected to the other sheet. Various forms can be adopted, such as one in which a total of four sheets at the bifurcated portions of the sheets are alternately overlapped to further improve the airtightness inside and outside of the inner sheet 3.

また、上記実施形態においては、食品は三角おにぎり(米飯加工食品)であり、シート状食品は海苔であった。しかし、食品は、食品用包装材で包装できる形であれば、三角以外の形状のおにぎり、寿司、サンドイッチ等であってもよく、食品の種類及び形状は限定されない。シート状食品も、食品用包装材の平面状の収容部に収容できる形であれば、シート状の昆布、畳鰯等であってもよく、シート状食品の種類及び形状は限定されない。 Further, in the above embodiment, the food was a triangular rice ball (processed cooked rice food), and the sheet-like food was seaweed. However, the food may be a rice ball, sushi, sandwich, etc. in a shape other than a triangle as long as it can be packaged with a food packaging material, and the type and shape of the food are not limited. The sheet-shaped food may also be a sheet-shaped kelp, tatami sardine, etc., as long as it can be accommodated in the planar storage part of the food packaging material, and the type and shape of the sheet-shaped food are not limited.

1…食品用包装材、10…本体、10a…一端、10b…他端、11…端部接合部、12…側部接合部、12a…連通部、13…切欠部、13a…第一の外形線、13b…第二の外形線、14…易破断部、14a…最も一端10a側に位置する凸部、16…余分なシート片、17…耳片、17a…封止部、18…接合部、2…外シート、20…切込線、21…摘み部、3…内シート、30…重ね合わせ部、4…シート状食品、5…開封用条体、6…三角おにぎり、7…ラベル、70…易破断部、8…ラベル、80…易破断部、CL…切断予定線、T…易破断部14と交わる部分の開封用条体5の接線、θ1…易破断部14の各谷部の幅方向外方の斜辺と、易破断部14と交わる部分における開封用条体5の接線Tとの交差角、θ2…易破断部14の各谷部の幅方向内方の斜辺と開封用条体5の接線Tとの交差角 DESCRIPTION OF SYMBOLS 1... Food packaging material, 10... Main body, 10a... One end, 10b... Other end, 11... End joint part, 12... Side joint part, 12a... Communication part, 13... Notch part, 13a... First external shape Line, 13b...Second outline, 14...Easy breakage part, 14a...Convex part located closest to one end 10a, 16...Excess sheet piece, 17...Lug piece, 17a...Sealing part, 18...Joint part , 2... Outer sheet, 20... Cut line, 21... Picking part, 3... Inner sheet, 30... Overlapping part, 4... Sheet food, 5... Strip for opening, 6... Triangular rice ball, 7... Label, 70...Easy breakage part, 8...Label, 80...Easy breakage part, CL...Scheduled cutting line, T...Tangential line of opening strip 5 at the part that intersects with easy breakage part 14, θ1...Each valley of easy breakage part 14 An angle of intersection between the outer oblique side in the width direction of Intersection angle of strip 5 with tangent T

Claims (4)

長手方向の一端から他端にかけて一対の開封用条体を有して幅方向に分離可能な長方形状ないし略長方形状の外シートと、シート状食品を挟んで前記外シートに重ね合わせられ、前記外シートと同方向に分離可能な内シートとを備え、前記シート状食品を囲むように前記外シートと前記内シートとが接合され、前記一端側の両側端部のそれぞれに、前記開封用条体のそれぞれに対応して鋸歯状の易破断部を備える食品用包装材を用い、食品を挟んで前記長手方向に二つ折りにすること及び両側の余分なシート片を中心側に折ることによって、食品が三角形状ないし略三角形状に包装された食品包装体において、
前記易破断部の各谷部の幅方向外方の斜辺と、前記易破断部と交わる部分における前記開封用条体の接線との交差角は、10度以上25度以下であり、
前記易破断部の各谷部の幅方向内方の斜辺と前記接線との交差角は、前記易破断部の各谷部の角度から前記易破断部の各谷部の幅方向外方の斜辺と前記接線との交差角を引いた角度であって、前記易破断部の各谷部の幅方向外方の斜辺と前記接線との交差角よりも大きく、65度以上である
食品包装体。
a rectangular or substantially rectangular outer sheet having a pair of strips for opening from one longitudinal end to the other end and separable in the width direction; The outer sheet and the inner sheet are separable in the same direction, the outer sheet and the inner sheet are joined so as to surround the sheet food, and the opening strip is provided on each of both ends of the one end. By using a food packaging material having serrated easy-to-break parts corresponding to each body, folding the food in half in the longitudinal direction, and folding the excess sheet pieces on both sides toward the center, In a food package in which food is packaged in a triangular or approximately triangular shape,
The angle of intersection between the outer oblique side in the width direction of each trough of the easily breakable part and the tangent to the opening strip at the part that intersects with the easily breakable part is 10 degrees or more and 25 degrees or less,
The intersection angle between the widthwise inner oblique side of each trough of the easy-to-break part and the tangent line is determined from the angle of each trough of the easily-breakable part to the widthwise outer oblique side of each trough of the easily-breakable part. The angle obtained by subtracting the intersection angle between the tangent line and the tangent line is larger than the intersection angle between the tangent line and the widthwise outer oblique side of each valley of the easily breakable portion, and is 65 degrees or more.
前記一対の開封用条体は、前記長手方向の前記一端から前記他端にかけて波形でかつ互いに交差するように配置される
請求項1に記載の食品包装体。
The food package according to claim 1, wherein the pair of opening strips are arranged in a waveform from the one end to the other end in the longitudinal direction and intersect with each other.
前記一対の開封用条体は、所定幅を有して前記長手方向に沿って平行に配置される
請求項1に記載の食品包装体。
The food package according to claim 1, wherein the pair of opening strips have a predetermined width and are arranged in parallel along the longitudinal direction.
前記一端側の両角部のそれぞれに、切欠部を備え、
前記易破断部は、前記切欠部と隣接して設けられる
請求項1ないし請求項のいずれか1項に記載の食品包装体。
A notch is provided at each of both corners of the one end,
The food package according to any one of claims 1 to 3 , wherein the easily breakable part is provided adjacent to the cutout part.
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JP3377969B2 (en) 1999-10-25 2003-02-17 朋和産業株式会社 Package of cooked rice food and packaged food product of cooked rice using the package
JP2018058631A (en) 2016-10-07 2018-04-12 朋和産業株式会社 Packaging body for cooked rice processed food and packaged cooked rice processed food

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JPH09185A (en) * 1995-04-17 1997-01-07 Chugoku Pearl Hanbai Kk Packing film and packed rice ball
KR20100102898A (en) * 2009-03-12 2010-09-27 호와산교가부시키가이샤 Wrapping material for processed food of cooked rice
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JP3377969B2 (en) 1999-10-25 2003-02-17 朋和産業株式会社 Package of cooked rice food and packaged food product of cooked rice using the package
JP2018058631A (en) 2016-10-07 2018-04-12 朋和産業株式会社 Packaging body for cooked rice processed food and packaged cooked rice processed food

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