JP3961611B2 - Lap film cutting blade and wrap film carton with cutting blade - Google Patents

Lap film cutting blade and wrap film carton with cutting blade Download PDF

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Publication number
JP3961611B2
JP3961611B2 JP09854697A JP9854697A JP3961611B2 JP 3961611 B2 JP3961611 B2 JP 3961611B2 JP 09854697 A JP09854697 A JP 09854697A JP 9854697 A JP9854697 A JP 9854697A JP 3961611 B2 JP3961611 B2 JP 3961611B2
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Japan
Prior art keywords
blade
cutting blade
wrap film
cutting
film cutting
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JP09854697A
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JPH10291526A (en
Inventor
洋 片山
誠 海野
保 合羽
孝 中村
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Kureha Corp
Kyodo Printing Co Ltd
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Kureha Corp
Kyodo Printing Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/08—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession
    • B65D83/0847—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture at the junction of two walls
    • B65D83/0852—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture at the junction of two walls with means for assisting dispensing
    • B65D83/0882—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession through an aperture at the junction of two walls with means for assisting dispensing and for cutting interconnected articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/175—Plastic
    • B65H2701/1752—Polymer film

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、主に食品包装用に用いられているラップフィルムを切断するための切断刃及びこの切断刃を有するラップフィルムカートンに関する。更に詳しくは、刃山と刃谷を交互に連ねた鋸刃状をなし、各刃山の頂点を結ぶ仮想ラインが略左右対称の山形に形成された切断刃及びこの切断刃を有するラップフィルムカートンに関する。
【０００２】
【従来の技術】
ラップフィルム用切断刃としては、上記仮想ラインが山形をなすものと、上記仮想ラインがフラットな直線となるものとが使用されている。いずれも金属製のものが主流で、紙製のラップフィルムカートンに一体に取り付けられて使用されている。
【０００３】
ところで、上記金属製の切断刃の場合、紙製のラップフィルムカートンから分離して廃棄しなければならず、廃棄に手間がかかることから、切断刃を紙で構成することが提案されている（特開平６−１３３８号公報）。また、切断刃をバルカナイズドファイバーで構成すると共に、中央の１つの刃山又は両側各１つの刃山を高くしておき、この箇所を切断開始点とすることで切れ味を向上させることも提案されている（実公平７−３８１３０号公報）。
【０００４】
【発明が解決しようとする課題】
しかしながら、紙で従来の金属製の切断刃と同様の鋸刃状の切断刃を構成しただけでは、十分な切断力が得られない問題がある。また、高い刃山の箇所を切断開始点とすると、ある程度の切れ味は得られるものの、切断開始時に力が集中するため、切断開始点となる高い刃山のヘタリを生じやすく、良好な切れ味を維持しにくい問題がある。このことは、上記仮想ラインが山形をなす切断刃を、ラップフィルムカートンの本体上面の開口部を覆う蓋体前面の掩蓋片の先端に下向きに取り付けた形態のものにあっては、仮想ラインが直線をなす切断刃の場合と比べて、山形の頂点により強い力が集中するため、問題はより深刻である。このような問題を解決するための手段として、紙製の切断刃に樹脂を含浸硬化させる方法も提案されているが、必ずしも満足する結果が得られていない。
【０００５】
本発明は、このような問題点に鑑みてなされたもので、特に、刃山と刃谷を交互に連ねた鋸刃状をなし、各刃山の頂点を結ぶ仮想ラインが略左右対称の山形をなす切断刃を紙で構成し、しかも多数枚切断後も良好な切れ味を保持できるようにすることを目的とする。
【０００６】
【課題を解決するための手段】
このために本発明は、刃山と刃谷を交互に連ねた鋸刃状をなし、各刃山の頂点を結ぶ仮想ラインが左右対称の山形に形成された紙製のラップフィルム用切断刃において、前記山形の中心位置が刃谷に位置し、前記山形の切断刃の中央領域に設けられた各刃山の頂点の間隔が、それ以外の側部領域に設けられた各刃山の頂点間の間隔よりも広く形成されており、しかも中心位置から左右夫々１番目及び２番目の刃山が他の刃山より０．１〜０．５ｍｍ低く形成されていることを特徴とするラップフィルム用切断刃としているものである。
【０００８】
尚、本発明の更に他の好ましい態様については、以下の説明で明らかにする。
【０００９】
【発明の実施の形態】
先ず、図１〜図３に基づいて、本発明に係る切断刃１の一例を説明する。
【００１０】
図１及び図２に示されるように、本切断刃１は、刃山２と刃谷３を交互に連ねた鋸刃状をなし、各刃山２の頂点を結ぶ仮想ラインが略左右対称の山形をなしている。
【００１１】
上記山形の中心位置４（長さ方向の中央）は、刃谷３に位置している。つまり、中心位置４には刃山２は存在せず、中心位置４から左右に一定間隔だけ離れた位置に刃山２が存在している。
【００１２】
ところで、各刃山２の頂点を結ぶ仮想ラインが山形をなす切断刃１によるラップフィルムの切断は、中心位置４付近の刃山２が最初にラップフィルムに突き刺さって、ラップフィルムの中央部から左右に切れ目を伝播させる切断形態をとる。中心位置４に刃山２が存在すると、切断開始時に、この中心位置４の刃山２がラップフィルムに突き刺さることになり、切断開始時の力を主に１つの刃山で受けることになる。つまり、切断開始時に加わる力が中心位置４の１つの刃山２に集中しやすいことから、当該刃山２がヘタリやすく、多数回に亙って良好な切れ味を維持できなくなる。
【００１３】
これに対して本切断刃１のように、中心位置４には刃山２は存在せず、中心位置４から左右に一定間隔だけ離れた位置に刃山２が存在していると、切断開始時に、中心位置４の左右に隣接する２つの刃山２がラップフィルムに突き刺さるようになる。つまり、切断開始時に加わる力を、中心位置４の左右に隣接する２つの刃山２で分散して受けることができ、刃山２のヘタリを防止することができる。
【００１４】
しかしながら、反面、上記のように切断開始時に加わる力を複数の刃山２で分散して受けるようにすると、各刃山２の頂部がラップフィルムに突き刺さりにくくなって、切れ味が低下するという問題を生じる。そこでこの問題を解決するために、本発明者は、中心位置４から左右に一定幅内の中央領域５に位置する刃山２の頂点間の間隔を、それ以外の側部領域６の刃山２の頂点間の間隔よりも広く形成することでこの問題を解消できることを見出した。中央領域５に位置する各刃山２の頂点間の間隔が、それ以外の側部領域６に位置する各刃山２の間隔よりも広くなっているのは、ラップフィルムの切断開始時に、一度に多数の刃山２の頂部がラップフィルムに接し、各刃山２の頂部がラップフィルムに突き刺さりにくくなって切れ味が低下するのを防止するためのものである。また、ラップフィルムは、一端切れ始めると、切れ目が次々と伝播して切れて行くので、この切れ目の伝播を所定の方向に導きやすくするため、側部領域６に位置する刃山２の頂点間の間隔は比較的狭く形成することが好ましい。
【００１５】
中央領域５における刃山２の頂点間の間隔は、４．０〜５．０ｍｍであることが好ましい。この間隔が広過ぎても狭過ぎても切れ味が低下しやすくなる。中央領域５における刃山２の頂点間の間隔は、通常は総て同じであるが、上記範囲において間隔を異ならせることもできる。この間隔が５．０ｍｍより広いと、ラップフィルムに対する突き刺し性は良いものの、ラップフィルムに形成された切れ目が伝播する際に不特定な方向にずれて行くおそれがあったり、刃山２のヘタリが早くなるといったおそれがあり、逆に４．０ｍｍより狭いと、ラップフィルムに対する突き刺し性が低下する。
【００１６】
側部領域６における刃山２の頂点間の間隔は、刃山２の高さとも関係し、２．５〜３．８ｍｍであることが好ましい。この間隔が広過ぎると、切れ目の伝播方向がそれやすく、逆に狭過ぎると、刃山２の高さが低くなり過ぎたり、刃山２が急峻な角度で突出したものとなって、刃山２の強度が維持しにくくなる。刃山２の高さは１．５〜２．０ｍｍであることが好ましく、高過ぎると刃山２の強度維持がしにくく、低過ぎると良好な切れ味が得にくくなる。また、側部領域６における刃山２の頂点間の間隔は総て同じであってもよいが、側部領域６において最も中央領域５側に位置する刃山２の頂点間の間隔は、側部領域６における他の刃山２の頂点間の間隔より大きくすることが好ましい。このようにすると、中央領域５から側部領域６への切れ目の伝播を滑らかなものとすることができる。
【００１７】
各刃山２の頂点を結ぶ仮想ラインに沿った本切断刃１の全体長さと中央領域５の長さと一方の側部領域６の長さを夫々Ｌ0 とＬ1 とＬ2 とした時に、Ｌ1 ／Ｌ0 ＝２／１５〜１／６、２Ｌ2 ／Ｌ0 ＝１３／１５〜５／６（但し、Ｌ1 ／Ｌ0 ＋２Ｌ2 ／Ｌ0 ＝１）であることが好ましい。全体長さＬ0 に対する中央領域５の長さＬ1 や側部領域６の長さＬ2 が長過ぎても短過ぎても切れ味が低下しやすくなる。すなわち、中央領域５の長さＬ1 が長過ぎると、中央領域５から側部領域６へのラップフィルムの切れ目の伝播が滑らかにいかず、逆に側部領域６の長さＬ2 が長過ぎると、ラップフィルムに対する初期の切断性が低下し、切れ味が低下する。
【００１８】
各刃山２の形状は、基本的には二等辺三角形状である。その頂角は７５〜８５度であることが好ましい。頂角が小さ過ぎると刃山２の強度を維持しにくく、逆に頂角が大き過ぎると切れ味が低下しやすくなる。また、本切断刃１全体に亙って切れ味を均一にしておくため、各刃山２の頂角は同じにしておくことが好ましい。
【００１９】
各刃山２は総て同じ二等辺三角形状でもよいが、中央領域５に位置する刃山２であって、中心位置４寄りの刃山２は、図３に明示されるように、等脚台形状の基部２ａと、基部２ａの斜辺と等しい傾斜角の斜辺を有しかつ基部２ａの上底より短い下辺の二等辺三角形状（頂角は７５〜８５度であることが好ましい）の頂部２ｂとから２段に形成されていることが好ましい。このような刃山２の形状とすると、頂部２ｂをラップフィルムに刺さりやすい形状としたまま、頂部２ｂが受ける、ラップフィルム切断に伴ってはたらく外方向への力を幅広の基部２ａで支えることができ、ラップフィルムの切断時にラップフィルムを外方向（ラップフィルムの引出方向）へ引っ張る力により刃山２が湾曲することを防ぐことで、切れ味を維持しつつ刃山２の強度を向上させることができる。特に中央位置４から左右夫々１番目及び２番目の刃山２は切断開始時に力が加わりやすいことから、上記２段に形成された刃山２とすることが好ましく、更にこれらを他の刃山２より０．１〜０．５ｍｍ程度低く形成しておくことが好ましい。
【００２０】
本切断刃１は、紙を基材として構成されているものである。この紙としては、通常の板紙が使用できる。また、刃山２の強度維持と良好な切れ味を得るためには、刃山２部分（少なくとも頂部）は樹脂が含浸硬化されていることが好ましく、特に切断刃１を構成する紙全体に樹脂が含浸硬化されていることが好ましい。
【００２１】
上記紙への樹脂の含浸硬化は、樹脂の溶液中に紙を浸漬し、取り出して乾燥硬化させる方法や、紫外線硬化型樹脂液中に紙を浸漬し、取り出して紫外線を照射して硬化させる方法等で行うことができる。樹脂としては、メラミン樹脂、ポリエステル系樹脂、アクリル系樹脂等の硬質樹脂が好ましく、これらの中でもアクリル系樹脂が好ましい。
【００２２】
次に、本切断刃１を有するラップフィルムカートンについて、図４に基づいて説明する。
【００２３】
本ラップフィルムカートンは、周知のように紙製のもので、ラップフィルム７のロールを収納する本体８と、この本体８上面の開口を覆う蓋体９とから構成されている。蓋体９は、本体８の背面と連なっており、この蓋体９前面の掩蓋片１０の内側には本切断刃１が下向きに取り付けられ、掩蓋片１０の先端縁から刃山２をのぞかせている。
【００２４】
ラップフィルム７の切断は、必要量だけラップフィルム７を引き出した後、掩蓋片１０の中央部を指で押さえ、掩蓋片１０上からラップフィルム７を押さえ付けた状態で、本ラップフィルムカートンを引き出したラップフィルム７側に傾けるようにして、ラップフィルム７に本切断刃１を押し付けることで行われる。
【００２５】
このようにすると、本切断刃１の中央位置４（図１及び図２参照）の両側に位置する２本の刃山２が主にラップフィルム７に突き刺さり、これによって生じた切れ目が、押し当てられた本切断刃１に沿って左右に広がることで切断されることになる。
【００２６】
【発明の効果】
本発明の切断刃１は紙を基材としているにも拘らず、良好な切れ味と多数枚の切断に耐える耐久性が得られ、しかもこの切断刃１を備えたラップフィルムカートンは、いちいち切断刃１を取り外すことなく廃棄することができる。
【図面の簡単な説明】
【図１】本発明に係る切断刃の一例を示す図である。
【図２】図１におけるＡ部の拡大図である。
【図３】図２におけるＢ部の拡大図である。
【図４】本発明に係るラップフィルムカートンの一例を示す斜視図である。
【符号の説明】
１ 切断刃
２ 刃山
２ａ 基部
２ｂ 頂部
３ 刃谷
４ 中心位置
５ 中央領域
６ 側部領域
７ ラップフィルム
８ 本体
９ 蓋体
１０ 掩蓋片[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cutting blade for cutting a wrap film mainly used for food packaging and a wrap film carton having the cutting blade. More specifically, a cutting blade having a saw blade shape in which blade ridges and blade valleys are alternately connected, and a virtual line connecting the vertices of each blade ridge is formed in a substantially symmetrical mountain shape, and a wrap film carton having this cutting blade. About.
[0002]
[Prior art]
As the cutting blade for a wrap film, there are used one in which the virtual line forms a mountain shape and one in which the virtual line becomes a flat straight line. All of them are mainly made of metal, and are used by being integrally attached to a paper wrap film carton.
[0003]
By the way, in the case of the above-mentioned metal cutting blade, it must be separated from the paper wrap film carton and discarded, and it takes time and effort to dispose of the cutting blade. JP-A-6-1338). In addition, it is also proposed that the cutting blade is made of vulcanized fiber, and that the center blade height or one blade height on each side is made higher and the sharpness is improved by setting this point as the cutting start point. (No. 7-38130).
[0004]
[Problems to be solved by the invention]
However, there is a problem that a sufficient cutting force cannot be obtained only by forming a saw blade-like cutting blade similar to a conventional metal cutting blade with paper. In addition, if a high cutting edge is used as the cutting start point, a certain degree of sharpness can be obtained, but since the force concentrates at the start of cutting, it tends to cause a high cutting edge to become a cutting start point and maintains a good sharpness. There is a problem that is difficult to do. This is because the virtual line has a cutting edge in which the virtual line forms a chevron and is attached downward to the tip of the lid piece on the front surface of the lid that covers the opening on the top surface of the wrap film carton body. The problem is more serious as the force concentrates more on the apex of the chevron than in the case of a straight cutting blade. As a means for solving such a problem, a method of impregnating and curing a resin on a paper cutting blade has been proposed, but a satisfactory result has not always been obtained.
[0005]
The present invention has been made in view of such problems, and in particular, has a saw-tooth shape in which blade ridges and blade valleys are alternately connected, and a virtual line connecting vertices of each blade ridge is substantially symmetrical. An object of the present invention is to make the cutting blade made of paper and to maintain a good sharpness even after cutting a large number of sheets.
[0006]
[Means for Solving the Problems]
The present invention To this end, without a saw blade shape had been alternately blade peaks and blade troughs, cutting paper wrap film formed Yamagata virtual line left right symmetrical connecting the vertices of each blade Yamaha The center position of the chevron is located in the blade valley, and the interval between the apexes of the tooth crests provided in the central region of the chevron-shaped cutting blade is the apex of the blade crests provided in the other side regions. The wrap film is characterized in that it is formed wider than the interval between them, and the first and second blade crests on the left and right sides from the center position are formed 0.1 to 0.5 mm lower than the other blade crests. Cutting blade.
[0008]
Still another preferred embodiment of the present invention will be clarified in the following description.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
First, based on FIGS. 1-3, an example of the cutting blade 1 which concerns on this invention is demonstrated.
[0010]
As shown in FIG. 1 and FIG. 2, the main cutting blade 1 has a saw blade shape in which the blade peaks 2 and the valleys 3 are alternately connected, and the virtual line connecting the vertices of the blade peaks 2 is substantially bilaterally symmetric. Yamagata.
[0011]
The central position 4 (the center in the length direction) of the chevron is located in the blade valley 3. That is, the tooth crest 2 does not exist at the center position 4, and the tooth crest 2 exists at a position apart from the center position 4 by a certain distance from side to side.
[0012]
By the way, the cutting of the wrap film by the cutting blade 1 in which the virtual line connecting the apexes of the respective blade ridges 2 forms a chevron is as follows. The blade ridges 2 near the center position 4 are first pierced into the wrap film and left and right from the center of the wrap film. It takes a cutting form that propagates the cut. If the blade ridge 2 exists at the center position 4, the blade ridge 2 at the center position 4 is pierced into the wrap film at the start of cutting, and the force at the start of cutting is mainly received by one blade ridge. That is, since the force applied at the start of cutting tends to concentrate on one blade crest 2 at the center position 4, the blade crest 2 is easy to stick and cannot maintain good sharpness over many times.
[0013]
On the other hand, as in the case of the main cutting blade 1, there is no blade crest 2 at the center position 4, and when the blade crest 2 is present at a position spaced apart from the center position 4 on the left and right sides, cutting starts. Sometimes, the two blade crests 2 adjacent to the left and right of the center position 4 are pierced into the wrap film. That is, the force applied at the start of cutting can be distributed and received by the two blade crests 2 adjacent to the left and right of the center position 4, and the settling of the blade crest 2 can be prevented.
[0014]
However, on the other hand, if the force applied at the start of cutting as described above is distributed and received by the plurality of blade ridges 2, the top of each blade ridge 2 becomes difficult to pierce the wrap film, and the sharpness is reduced. Arise. Therefore, in order to solve this problem, the present inventor determines the interval between the apexes of the blade ridges 2 located in the central region 5 within a certain width from the center position 4 to the left and right, and the blade ridges of the other side regions 6. It was found that this problem can be solved by forming the gap wider than the distance between the two vertices. The interval between the apexes of each blade crest 2 located in the central region 5 is wider than the interval between each blade crest 2 located in the other side region 6 at the start of wrap film cutting. In addition, the tops of a large number of blade ridges 2 are in contact with the wrap film, and the tops of the blade ridges 2 are less likely to pierce the wrap film and prevent sharpness from being lowered. In addition, when the wrap film starts to be cut at one end, the cuts propagate one after another, so that the propagation of the cuts can be easily guided in a predetermined direction, between the apexes of the blade ridges 2 located in the side region 6. It is preferable to form a relatively narrow interval.
[0015]
It is preferable that the space | interval between the vertexes of the blade ridge 2 in the center area | region 5 is 4.0-5.0 mm. If this interval is too wide or too narrow, the sharpness tends to be lowered. The intervals between the vertices of the blade ridges 2 in the central region 5 are usually all the same, but the intervals can also be varied in the above range. When this interval is wider than 5.0 mm, the piercing property to the wrap film is good, but there is a possibility that the cut formed in the wrap film may be shifted in an unspecified direction, or the cutting edge 2 may be damaged. If it is narrower than 4.0 mm, the piercing property to the wrap film is lowered.
[0016]
The distance between the apexes of the blade ridge 2 in the side region 6 is also related to the height of the blade ridge 2 and is preferably 2.5 to 3.8 mm. If this interval is too wide, the propagation direction of the cut is likely to be deviated, and conversely if it is too narrow, the height of the blade ridge 2 becomes too low, or the blade ridge 2 protrudes at a steep angle. The strength of 2 becomes difficult to maintain. The height of the blade ridge 2 is preferably 1.5 to 2.0 mm. If it is too high, it is difficult to maintain the strength of the blade ridge 2, and if it is too low, it becomes difficult to obtain a good sharpness. The intervals between the apexes of the blade ridges 2 in the side region 6 may all be the same, but the intervals between the vertices of the blade ridges 2 located closest to the central region 5 in the side region 6 are It is preferable to make it larger than the interval between the vertices of the other cutting edges 2 in the partial region 6. In this way, the propagation of the break from the central region 5 to the side region 6 can be made smooth.
[0017]
When the overall length of the main cutting blade 1, the length of the central region 5 and the length of one side region 6 along the virtual line connecting the vertices of the blade peaks 2 are L 0 , L 1 and L 2 , respectively. It is preferable that L 1 / L 0 = 2/15 to 1/6, 2L 2 / L 0 = 13/15 to 5/6 (where L 1 / L 0 + 2L 2 / L 0 = 1). Total length sharpness even after even short too long length L 2 of the length L 1 and the side region 6 of the central area 5 for L 0 tends to decrease. That is, if the length L 1 of the central region 5 is too long, the wrap film breaks from the central region 5 to the side region 6 do not propagate smoothly, and conversely the length L 2 of the side region 6 is long. When too much, the initial cutting property with respect to a wrap film will fall and sharpness will fall.
[0018]
The shape of each tooth crest 2 is basically an isosceles triangle. The apex angle is preferably 75 to 85 degrees. If the apex angle is too small, it is difficult to maintain the strength of the blade ridge 2. On the other hand, if the apex angle is too large, the sharpness tends to decrease. Moreover, in order to make the sharpness uniform over the entire cutting blade 1, it is preferable that the apex angle of each blade crest 2 is the same.
[0019]
Each of the blade ridges 2 may be the same isosceles triangle shape, but the blade ridge 2 located in the central region 5, and the blade ridge 2 near the center position 4, as shown in FIG. A trapezoidal base portion 2a and a top portion of an isosceles triangle having a hypotenuse having an inclination angle equal to the hypotenuse of the base portion 2a and shorter than the upper base of the base portion 2a (the apex angle is preferably 75 to 85 degrees) It is preferably formed in two stages from 2b. With such a shape of the edge 2, it is possible to support the outward force that the top portion 2 b receives along with the cutting of the wrap film with the wide base portion 2 a while keeping the top portion 2 b in a shape that can easily be stuck into the wrap film. It is possible to improve the strength of the blade crest 2 while maintaining sharpness by preventing the blade crest 2 from being bent by the force of pulling the wrap film outward (the direction of drawing the wrap film) when cutting the wrap film. it can. In particular, since the first and second blade crests 2 on the left and right sides from the center position 4 are likely to be subjected to a force at the start of cutting, it is preferable to use the blade crest 2 formed in the above-described two stages. It is preferable to form it about 0.1 to 0.5 mm lower than 2.
[0020]
The cutting blade 1 is configured with paper as a base material. As this paper, a normal paperboard can be used. In order to maintain the strength of the blade ridge 2 and obtain a good sharpness, it is preferable that the blade ridge 2 portion (at least the top portion) is impregnated and cured with resin. In particular, the resin is applied to the entire paper constituting the cutting blade 1. It is preferably impregnated and cured.
[0021]
The resin impregnation and curing of the paper is performed by immersing the paper in a resin solution and taking it out for drying and curing, or by immersing the paper in an ultraviolet curable resin solution, taking it out and irradiating it with ultraviolet rays for curing. Etc. The resin is preferably a hard resin such as a melamine resin, a polyester resin, or an acrylic resin, and among these, an acrylic resin is preferable.
[0022]
Next, a wrap film carton having the main cutting blade 1 will be described with reference to FIG.
[0023]
As is well known, the wrap film carton is made of paper, and is composed of a main body 8 that houses a roll of the wrap film 7 and a lid body 9 that covers an opening on the upper surface of the main body 8. The lid body 9 is continuous with the back surface of the main body 8, and the main cutting blade 1 is attached to the inside of the lid cover piece 10 on the front surface of the lid body 9, and the cutting edge 2 is viewed from the tip edge of the lid cover piece 10. Yes.
[0024]
To wrap the wrap film 7, after pulling out the wrap film 7 as much as necessary, the center part of the lid cover piece 10 is pressed with a finger, and the wrap film carton is pulled out while pressing the wrap film 7 on the lid cover piece 10. The cutting blade 1 is pressed against the wrap film 7 so as to be inclined toward the wrap film 7 side.
[0025]
In this way, the two blade crests 2 located on both sides of the central position 4 (see FIGS. 1 and 2) of the main cutting blade 1 mainly pierce the wrap film 7, and the cuts generated thereby are pressed against each other. It will be cut | disconnected by spreading right and left along the main cutting blade 1 which was made.
[0026]
【The invention's effect】
Although the cutting blade 1 of the present invention uses paper as a base material, it has good sharpness and durability that can withstand a large number of sheets, and the wrap film carton provided with this cutting blade 1 is a cutting blade. 1 can be discarded without removal.
[Brief description of the drawings]
FIG. 1 is a view showing an example of a cutting blade according to the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is an enlarged view of a portion B in FIG.
FIG. 4 is a perspective view showing an example of a wrap film carton according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting blade 2 Blade mountain 2a Base 2b Top part 3 Cutting valley 4 Center position 5 Central area | region 6 Side area | region 7 Lap film 8 Main body 9 Lid body 10 Claw piece

Claims (7)

刃山と刃谷を交互に連ねた鋸刃状をなし、各刃山の頂点を結ぶ仮想ラインが左右対称の山形に形成された紙製のラップフィルム用切断刃において、前記山形の中心位置が刃谷に位置し、前記山形の切断刃の中央領域に設けられた各刃山の頂点の間隔が、それ以外の側部領域に設けられた各刃山の頂点間の間隔よりも広く形成されており、しかも中心位置から左右夫々１番目及び２番目の刃山が他の刃山より０．１〜０．５ｍｍ低く形成されていることを特徴とするラップフィルム用切断刃。None blade peaks and cutting saw blade shape had been alternately valley, in wrap film cutting blade made of a virtual line is formed on the chevron of the left right symmetrical paper connecting the apexes of the blades mountains, the center position of the Yamagata Is located in the blade valley, and the interval between the apexes of each blade crest provided in the central region of the chevron-shaped cutting blade is formed wider than the interval between the apexes of each blade crest provided in the other side region. A wrapping film cutting blade, wherein the first and second blade crests on the left and right sides of the center position are formed lower by 0.1 to 0.5 mm than the other blade crests . 前記中央領域に設けられた各刃山の頂点の間隔が４．０〜５．０ｍｍ、それ以外の側部領域に設けられた各刃山の頂点の間隔が２．５〜３．８ｍｍであることを特徴とする請求項１記載のラップフィルム用切断刃。Spacing 4.0~5.0mm vertices of each blade mountain provided in front Symbol in central region, other spacing of the vertex of each blade mountains provided on the side region of 2.5~3.8mm wrap film cutting blade of claim 1 Symbol mounting, characterized in that it. 各刃山の高さが１．５〜２．０ｍｍであることを特徴とする請求項１又は２に記載のラップフィルム用切断刃。The height of each blade crest is 1.5-2.0 mm, The cutting blade for wrap films of Claim 1 or 2 characterized by the above-mentioned. 各刃山の頂点を結ぶ仮想ラインに沿った全体長さと中央領域の長さと一方の側部領域の長さをそれぞれＬ0とＬ1とＬ2とした時に、Ｌ1／Ｌ0＝２／１５〜１／６、２Ｌ2／Ｌ0＝１３／１５〜５／６であることを特徴とする請求項１〜３のいずれか１項に記載のラップフィルム用切断刃。The length and the length of one side region of the overall length and Hisashi Naka region along the imaginary line connecting the apexes of the blades mountain when the L 0 and L 1 and L 2, respectively, L 1 / L 0 = 2 / 15~1 / 6,2L 2 / L 0 = 13 / 15~5 / 6 wrap film cutting blade according to any one of claims 1 to 3, characterized in that a. 前記中央領域において、少なくとも中心位置の左右に隣接して位置する各刃山が、等脚台形状の基部と、基部の上底より短い下辺の三角形状の頂部とからなることを特徴とする請求項１〜４のいずれか１項に記載のラップフィルム用切断刃。Wherein prior SL in central region, each blade mountain located adjacent to the left and right of the at least the center position, the base of the substantially isosceles trapezoidal, triangular top Toka Rana Rukoto shorter than the upper base of the base lower wrap film cutting blade according to any one of claims 1 to 4,. 前記各刃山の少なくとも頂部に樹脂が含浸硬化されていることを特徴とする請求項１〜５のいずれか１項に記載のラップフィルム用切断刃。Wherein at least the wrap film cutting blade according to any one of claims 1 to 5, the resin in the top portion, characterized in that it is hardened impregnation of each blade mountain. 請求項１〜６のいずれか１項に記載のラップフィルム用切断刃が、蓋体前面の掩蓋片の先端に下向きに取り付けられていることを特徴とする切断刃付ラップフィルムカートン。Any wrap film cutting blade according to item 1 is the cutting blade with the wrap film carton, characterized in that attached downwardly to the tip of the lid front of Engai piece claims 1-6.
JP09854697A 1997-04-16 1997-04-16 Lap film cutting blade and wrap film carton with cutting blade Expired - Fee Related JP3961611B2 (en)

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JP09854697A JP3961611B2 (en) 1997-04-16 1997-04-16 Lap film cutting blade and wrap film carton with cutting blade

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JP5102466B2 (en) * 2006-05-31 2012-12-19 株式会社クレハ Cutting blade for packaging container and packaging container having the same

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