JPH08318935A - Wrapping film housing box - Google Patents

Abstract

PURPOSE: To suppress the generation of cracks at the end of a cut film while keeping the cutting capability possessed by a conventional article by a method wherein the dimensions of respective parts of the ridge parts and the shape of valley parts for a saw blade to cut a wrapping film being pulled out from a box body, and the length of a thin film state which exists between a surface of the box body and the surface of the saw blade are respectively specified. CONSTITUTION: A wrapping film is pulled out from a rolled film which is housed in a housing chamber, and a required quantity of the wrapping film is cut by a metal blade which is fixed by caulking claws at the leading end of a covering lid piece. In this case, for the saw blade, the height of the ridge part is set at 0.60-0.40mm, the tilting angle of the ridge part is set at 55-65 degrees, and a pitch between the ridge parts is set at 1.46-0.72mm respectively, and at the same time, the shape of a valley of the saw blade is formed into a flat shape with a length of 0.30-0.70mm. Then, the shape of the tip of the ridge part is formed into arc shapes which are different at both ends and at the center. At the same time, the arcs are set at 0.02-0.05mm at both ends and at 0.05-0.08mm at the center, respectively. In the meantime, a thin film state which has the same width with the saw blade and is made to exist between the surface of a box body and the surface of the saw blade under a state wherein its end protrudes from the end of the saw blade is arranged only in an area which extends to 3-8% of the length of the saw blade from the side end of the saw blade.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】一般家庭や食品販売業等で、主と
して食品の直接包装用に汎用されているラップフイルム
収納箱の改良技術に関する。[Industrial field of application] The present invention relates to an improved technique for a wrap film storage box that is generally used for direct packaging of foods in general households and food sales businesses.

【０００２】[0002]

【従来の技術】従来、図５に示す様な柱状形の箱と箱の
収納室に収納した巻回フイルムからなり、その巻回フイ
ルムからラップフイルムの必要量を引き出し、引き出し
たフイルムを箱に配備した長尺の金属製鋸刃の歯で鋸刃
に沿って切断して用いるラップフイルム収納箱であっ
て、上記金属製鋸刃は、該鋸刃と同じ幅の薄膜状体を、
薄膜状体の端が該鋸刃端からはみ出す状態で該鋸刃面と
箱体面との間に介在させてカシメ爪で箱に固定されてい
るラップフィルム収納箱は公知であり（例えば特開平６
ー５６１４９号公報）、且つ広く市販されている。2. Description of the Related Art Conventionally, a columnar box as shown in FIG. 5 and a winding film housed in a box storage chamber are used. A required amount of wrap film is drawn from the winding film and the drawn film is put in a box. A wrap film storage box to be used by cutting along the saw blade with the teeth of a long metal saw blade that has been deployed, wherein the metal saw blade has a thin film body having the same width as the saw blade,
A wrap film storage box is known in which the edge of the thin film-like body is interposed between the saw blade surface and the box surface and is fixed to the box with a crimping claw in a state of protruding from the saw blade end (for example, Japanese Patent Laid-Open Publication No. Hei 10 (1999) -242242). 6
No. 56149), and is widely marketed.

【０００３】この柱状形の箱には、例えば円柱状、三角
から八角の多角柱状形の種々のものが知られている。図
５（Ａ）（Ｂ）のラップフィルム収納箱は、その中で広
く市販されて汎用の四角柱状形のラップフィルム収納箱
である場合を例示したもので、前板１、底板２、後板
３、及び脇板８とで形成された上部が開口した長方形の
収納室１３と、収納室１３の後板３側縁から収納室開口
部を覆う方向に連接した蓋板４と、その蓋板４の側縁か
ら前板１を覆う方向に延した掩蓋片５とを有した長方形
の箱体であって、収納室１３に収納した巻回フイルムＲ
からラップフイルムＦの必要量を引き出し、掩蓋片５の
先端に箱体長手に沿ってカシメ具１２によって固定し配
備してある長尺の金属製の鋸刃Ｋの歯で、鋸刃に沿って
切断して用いる形態のラップフィルム収納箱である。Various columnar boxes are known, for example, a columnar shape and a polygonal columnar shape having a triangular shape to an octagonal shape. The wrap film storage box of FIGS. 5 (A) and 5 (B) exemplifies a case where the wrap film storage box is widely sold and is a general-purpose quadratic prism-shaped wrap film storage box. The front plate 1, the bottom plate 2, and the rear plate are illustrated. 3, and a rectangular storage chamber 13 formed by the side plate 8 and having an upper opening, a lid plate 4 connected from the side edge of the rear plate 3 of the storage chamber 13 in a direction to cover the storage chamber opening, and the lid plate thereof. 4 is a rectangular box body having a cover lid piece 5 extending from the side edge of 4 in a direction to cover the front plate 1, and is a winding film R stored in a storage chamber 13.
The required amount of the wrap film F is pulled out from the wrapping film F, and the teeth of the long metal saw blade K fixed and deployed by the crimping tool 12 along the longitudinal direction of the box body at the tip of the covering lid piece 5 along the saw blade. It is a wrap film storage box that is used after being cut.

【０００４】この種の箱体の多くは板紙製で、各々の折
り線部で各部位板面をほぼ直角に折り曲げて形成したも
のであり、蓋板４から脇板８を覆う方向に延した脇掩蓋
片１１を有したもの、或いは上記脇掩蓋片１１を有して
いない場合のものである。また、鋸刃の全体形状（刃先
を結ぶ仮想線の形状）では、直状のもの、凹形弧状のも
の、凸形弧状のもの、Ｖ形突形状のもの、台形突形状の
もの等が知られている。Most of the boxes of this type are made of paperboard and are formed by bending the plate surfaces of the respective parts at substantially right angles at the respective folding line portions, and extend from the cover plate 4 to the side plate 8. It is a case where the side cover lid piece 11 is provided or a case where the side cover lid piece 11 is not provided. In addition, the overall shape of the saw blade (the shape of the virtual line connecting the cutting edges) is known to be straight, concave, convex, V-shaped, trapezoidal, etc. Has been.

【０００５】図５（Ａ）は、収納箱から開封片６を、局
部接合部９の部分の剥離を進めながら切取り線１０で切
断除去して開封しようとする段階を、図５（Ｂ）は開封
してラップフイルムＦを引き出した段階を示す図であ
る。薄膜状体は、空箱として廃棄する際鋸刃を箱から安
全で容易に引き剥がすための補助が役割である。図５
（Ｂ）の鋸刃Ｋの端に描かれている薄膜状体のはみ出し
部Ｐは、鋸刃と箱体（板紙）との間に介在している薄膜
状体が鋸刃端部から突出している部分を示すもので、鋸
刃の引き剥がしの開始場所を消費者に教える標識を兼ね
た引き剥がし時の取っ手部となる。この薄膜状体は、鋸
刃となる金属薄板と一緒に金型で切断されるため、鋸刃
と同じ幅で同じ歯山形状となりラップフィルム切断の障
害にならないし、鋸刃のカシメ強度を調節できる利点が
ある。従って、切断性能を維持しつつ鋸刃を容易に且つ
安全に箱体から引き剥がせると言う高い市場評価を得て
いる。FIG. 5 (A) shows a stage in which the unsealing piece 6 is cut and removed by the cutting line 10 while the peeling of the part of the local joint portion 9 is being proceeded from the storage box to open the unsealing piece. It is a figure which shows the step which opened and pulled out the wrap film F. The thin film body plays a role in safely and easily peeling the saw blade from the box when discarding it as an empty box. Figure 5
In the protruding portion P of the thin film-shaped body drawn at the end of the saw blade K in (B), the thin film-shaped body interposed between the saw blade and the box body (paperboard) projects from the saw blade end portion. It shows the part where the saw blade is peeled off, and also serves as a handle when peeling off, which also serves as a sign that tells the consumer where to start peeling off the saw blade. Since this thin film is cut with a die together with a metal thin plate that serves as a saw blade, it has the same width as the saw blade and has the same tooth profile, which does not hinder the cutting of the wrap film and adjusts the caulking strength of the saw blade. There are advantages. Therefore, it has been highly evaluated in the market that the saw blade can be easily and safely removed from the box while maintaining the cutting performance.

【０００６】この種の市販収納箱での切断方法は、俗称
『持ち上げ切り』『水平開き切り』『中央回転切り』の
３種類に大別される。即ちこの切断方法のそのいずれも
は、引き出されたラップフイルムＦの経路が、先ず蓋を
した状態で前板１の表面と掩蓋片５の裏面との間を通
り、フイルムが掩蓋片５の先の切断具の歯山でほぼ直角
に屈折させ、そのフイルム端は掩蓋片に垂直な水平方向
に向かうように誘導し、そして掩蓋片５の表面の長手中
央を親指で抑えた制動力と、誘導したフイルム端を保持
した手との間で更にフイルムに間に張力を与え、その張
力で歯先をフイルムに食い込ませて切断するものである
ことは共通している。只この場合の張力の与え方が相違
していて、（Ｉ）前板１と掩蓋片５との間のフイルムと
フイルム端側との間でなす角度を４５度以下の鋭角にな
る方向にフイルム端を持ち上げ、且つ箱を保持した手と
フイルム端を保持した手との相対的な捻り動作で、歯先
に当接するフイルムが鋸刃の一端から他端に向けて順次
に当接する方向にフイルムに張力を加えて、フイルム幅
の一端から他端に向け順次切断する『持ち上げ切り』、
（ＩＩ）上記の箱と誘導したフイルムとの水平関係は維
持したまま、箱の長手一端側を軸に箱体の長手の先端が
水平方向に孤を描く様に、箱を保持している手首を水平
横に振り広げることで張力を加え、フイルムを幅の一端
から他端に向けて順次切断する『水平開き切り』、（Ｉ
ＩＩ）上記の箱と誘導したフイルムとの水平関係は維持
したまま、保持している箱を手首で下方側に回転させ、
歯先でフイルムに張力を加え、フイルム幅の中央部から
その両側端に向けて順次切断する『中央回転切り』の３
種に分類できる。この３種の切断方法は、いずれも箱部
位の長手方向のほぼ全域に配置された長尺の金属製鋸刃
の、その鋸刃の歯先でフイルムが切り裂かれ、フイルム
は鋸刃の形状に沿って正確に切断されると言う利点を活
用しようとするものである。従って採用した鋸刃の全体
的な形状による適性、即ち、例えば全体の形状がＶ字状
をした鋸刃のものは『中央回転切り』には極めて優れる
が、他の２法は幾分不得手であり、全体の形状が平坦な
直状の切断具のものは『持ち上げ切り』『水平開き切
り』には優れているが『中央回転切り』は若干不得手と
なる等の形状適用性が多少は存在するものの、３種の切
断方法について金属製の鋸刃には、紙製やプラスチック
製の鋸刃では到達し得ない高水準の切断性能（材質の特
性に起因する性能）が具備されているので、消費者の好
みに合った切断方法が提供できる優位性がある。[0006] The cutting method using this type of commercially available storage box is roughly classified into three types, commonly known as "lifting cut", "horizontal opening cut", and "center rotation cut". That is, in any of these cutting methods, the path of the drawn wrap film F passes between the front surface of the front plate 1 and the back surface of the covering lid piece 5 in the state where the lid is first covered, and the film is the tip of the covering lid piece 5. The cutting edge of the cutting tool is bent almost at a right angle, its film end is guided toward the horizontal direction perpendicular to the cover piece, and the braking force by holding the longitudinal center of the surface of the cover piece 5 with the thumb is used. It is common that tension is applied to the film between the hand holding the edge of the film and the film, and the tooth tip is cut into the film by the tension. In this case, the method of applying the tension is different, and (I) the angle between the film between the front plate 1 and the covering lid piece 5 and the film end side becomes an acute angle of 45 degrees or less. By the relative twisting motion of the hand holding the box and holding the box and the hand holding the film end, the film contacting the tooth tips sequentially contacts from the one end of the saw blade to the other end. Applying tension to the film, and sequentially cutting from one end of the film width to the other end
(II) A wrist holding the box so that the horizontal relationship between the box and the guided film is maintained, and the longitudinal end of the box draws an arc in the horizontal direction around the longitudinal one end side of the box. Is applied horizontally to spread the film horizontally to cut the film sequentially from one end of the width to the other end.
II) While maintaining the horizontal relationship between the above box and the guided film, rotate the box being held downward with the wrist,
3) "Center rotation cutting" in which tension is applied to the film at the tip of the tooth and the film is cut sequentially from the center of the film width toward both ends
It can be classified into species. All of these three cutting methods are long metal saw blades that are arranged almost all over the longitudinal direction of the box part, and the film is cut at the tips of the saw blades, and the film is cut into the shape of the saw blade. It seeks to take advantage of the fact that it is cut exactly along. Therefore, the suitability according to the overall shape of the saw blade adopted, that is, the saw blade with a V-shaped overall shape, is extremely excellent for "central rotary cutting", but the other two methods are somewhat unsuitable. Therefore, a straight cutting tool with a flat overall shape is excellent for "lifting cut" and "horizontal opening cut", but "center rotation cut" is a little weak, and the shape applicability is somewhat. Although there are three types of cutting methods, metal saw blades have a high level of cutting performance (performance due to the characteristics of the material) that cannot be reached with paper or plastic saw blades. Therefore, there is an advantage that a cutting method suitable for consumers' taste can be provided.

【０００７】また、消費者にはラップフィルム切断時に
発生する切断音に対し強い興味を示す。即ち消費者は、
長年聞き慣れた金属製鋸刃による切断音に爽快感を持
ち、金属製鋸刃の切断音とは明らかに異質な紙製やプラ
スチック製の鋸刃による切断音は違和感を持ってしま
う。又、金属製鋸刃であっても長年聞き慣れた切断音で
ないと違和感を感じる傾向が、実用モニター調査等によ
り判明している。つまり切断音は、今やラップフイルム
切断具の切断性能の要求品質のひとつになっている。[0007] Further, consumers are strongly interested in the cutting sound generated when the wrap film is cut. That is, the consumer
The cutting sound of metal saw blades that I've been accustomed to for many years has a refreshing feeling, and the cutting sound of paper and plastic saw blades, which is distinctly different from the cutting noise of metal saw blades, feels strange. In addition, it has been found from practical monitor surveys that even a metal saw blade tends to feel uncomfortable unless it has a cutting sound that has been familiar for many years. In other words, the cutting sound is now one of the qualities required for the cutting performance of wrap film cutting tools.

【０００８】即ち、市販のラップフイルム収納箱の一部
の鋸刃が、紙製鋸刃やプラスチック製に変更され始めた
時流に抗して、未だあえて長尺の金属製鋸刃の採用を固
持している理由は、不特定多数の人たちが、夫々の好み
の切断方法で常に正確で確実に高い切断性能を維持して
切断できることが要求される市販のラップフイルム市場
にあっては、材質上でその硬度や剛性などの基本的特性
が満たせない紙製鋸刃やプラスチック製鋸刃では、とて
もこの高い市場要求を満足させることが出来ないと言う
市場調査結果の判断に基ずくものである。そして現状の
市販の収納箱には、歯山の高さ（山の頂の仮想線と谷の
底の仮想線間の距離）は約１．０ｍｍ、歯山の傾斜角
（山の稜線間の角度）は約６０度、歯山のピッチ（山の
中心仮想線間の距離）は約１．１６ｍｍ、歯山の先端に
形成される円弧の半径は約０．１ｍｍである長尺の金属
製鋸刃が採用されている。この鋸刃の歯山の形状デザイ
ンは、指等を傷付けない安全性と高度な切断性能の確保
及びその持続性と切断音の四面を満たす観点から厳選さ
れており、且つその加工精度には細心の注意を払った工
程管理が行なわれているので、フイルムに対する切れ味
（高度な切断性能とその性能の持続性）の面では、消費
者には『極めて優れる』と言う高い評価を得て重用され
ているのである。[0008] That is, against the tide when some saw blades of commercially available wrap film storage boxes began to be changed to paper saw blades or plastic saw blades, the long metal saw blades were still used. The reason for this is that in the commercially available wrap film market, which requires an unspecified number of people to always maintain accurate and reliable high cutting performance with their favorite cutting method, It is based on the judgment of the market research result that the above-mentioned high market demand cannot be satisfied with the paper saw blades and plastic saw blades whose basic characteristics such as hardness and rigidity cannot be satisfied above. . In the current commercial storage box, the height of the tooth crest (distance between the virtual line of the top of the mountain and the virtual line of the bottom of the valley) is about 1.0 mm, and the inclination angle of the tooth crest (between the ridge lines of the mountain). The angle) is about 60 degrees, the pitch of the tooth peaks (distance between virtual lines of the center of the mountain) is about 1.16 mm, and the radius of the arc formed at the tip of the tooth peak is about 0.1 mm. A saw blade is used. The shape design of the tooth flanks of this saw blade is carefully selected from the viewpoint of ensuring safety without damaging fingers etc. and ensuring high cutting performance, and maintaining its durability and cutting noise. Since the process control is performed with the utmost care, it is used with a high evaluation that the consumer is "extremely excellent" in terms of the sharpness of the film (high cutting performance and sustainability of the performance). -ing

【０００９】なお、この種の収納箱には、掩蓋片５で覆
われる前板１の表面にフイルムの仮留め部Ｑを配置して
ある。このフイルムの仮留め部Ｑの役割は、引き出した
フイルムの切断端部が、切断時の弾みで箱内に巻戻る
（次の引き出しが困難になってしまう）現象を防ぐため
の巻戻り防止機能である。In this type of storage box, a temporary holding portion Q of the film is arranged on the surface of the front plate 1 covered with the covering lid piece 5. The role of the temporary holding portion Q of the film is a rewinding prevention function for preventing the cut end of the pulled out film from being rewound into the box due to the bouncy at the time of cutting (the next pulling out becomes difficult). Is.

【００１０】[0010]

【発明が解決しようとする課題】しかしながら、近年こ
の種の収納箱には縦、横、斜めの方向（即ち意図しない
方向）にフイルムが裂けると言う不良現象が発生する。
この不良現象は、例えば塩化ビニリデン系樹脂製の肉厚
が８〜１５μｍのラップフイルムに多く、また不良の発
生する状況は、上記の仮留め部Ｑに係止されたフイルム
端を剥がして次のフイルムの引き出しをしようとする際
に、剥がしとろうとするフイルム端に付いている歯山の
部分（歯山の跡）から、フイルムが縦方向、横方向、斜
めの方向（即ち意図しない方向）に裂け走ってしまい、
次のフイルムの引き出しが困難になることである。この
現象を顕著にした原因は、引き出したフイルムの切断端
部が箱内に巻戻る現象を完全に防ぐ対策として、仮留め
部Ｑの係止能を高めた近来の処置が、仮留め部Ｑに係止
したフイルムの剥がし採りを困難にしたことにある。し
かし仮に、仮留め部Ｑの係止能を下げてフイルムの剥が
し採りを容易にすると、フイルム切断端部が巻戻る現象
が増加してしまうので、意図しない方向にフイルムが裂
け走る不良現象の発生場所が、仮留め部Ｑから巻回フイ
ルムＲの表面（つまり巻回フイルムの表面に密着したフ
イルム切断端部の剥がし採り）に、その発生場所を移す
だけのことであり抜本対策にはなりえない。However, in recent years, such a storage box suffers from a defective phenomenon that the film is torn in the vertical, horizontal, and diagonal directions (that is, unintended directions).
This defective phenomenon is common in, for example, a wrap film made of vinylidene chloride resin having a wall thickness of 8 to 15 μm. In the situation where a defective occurs, the film end locked to the temporary fastening portion Q is peeled off to When attempting to pull out the film, the film is moved in the longitudinal, lateral, or diagonal direction (that is, in an unintended direction) from the part of the tooth crest (the mark of the crest) that is attached to the edge of the film to be peeled off. Ripped and ran,
It is difficult to pull out the next film. The reason for making this phenomenon noticeable is that the recent measures that enhance the locking ability of the temporary fastening portion Q are as a measure to completely prevent the phenomenon that the cut end portion of the drawn film rewinds into the box. The reason is that it was difficult to peel off the film that was locked to. If, however, the locking ability of the temporary fastening portion Q is lowered to facilitate peeling off of the film, the phenomenon that the cut end of the film rewinds increases, so that a defective phenomenon of the film tearing and running in an unintended direction occurs. The place is simply to move the place of occurrence from the temporary fastening part Q to the surface of the winding film R (that is, peeling off the cut end of the film that is in close contact with the surface of the winding film). Absent.

【００１１】フイルムの斜め切れを防ぐ提案には、例え
ば特開平６−２９３３３５号公報の発明がある。この提
案では、引き裂き強度が２〜１００ｇｒで縦横の強度の
比が１．５以上のフイルムの斜め切れが防止できる記載
になっているが、しかしながらこの提案では、相対的に
縦方向に対して横（幅）方向の引き裂き強度を弱めた巻
回フイルムを、箱の長手方向の端部にのみ鋸刃を設けた
収納箱に収容し、引き出したフイルムの脇側のみに鋸刃
で切れ目を入れ、その切れ目から引き裂き伝播でフイル
ムを横（幅）方向に引き裂く（切断する）ことを内容と
していて、その際は、フイルム端に鋸刃の跡が付かない
ので斜め切れの発生が防げるし、また横方向の引き裂き
強度が弱められているものほど、切断（引き裂き）が容
易になることを効果にしているに留まる。従って、引き
裂き伝播でフイルムを横（幅）方向に引き裂く技術の不
確実さ（切断端の形状が不揃いになる問題）を避ける意
味で、長尺の鋸刃の歯に沿った切断を対象にした場合、
引き裂き伝播でフイルムを切断する内容の上記特開の提
案では、対象を異にする。更には本発明の目的の長尺の
鋸刃の歯に沿った切断に関しては何の提案もされていな
い。As a proposal for preventing the film from being obliquely cut, there is, for example, the invention disclosed in Japanese Patent Laid-Open No. 6-293335. In this proposal, the tear strength is 2 to 100 gr, and the ratio of the strength in the length and width is 1.5 or more. The winding film with weakened tear strength in the (width) direction is housed in a storage box with a saw blade only at the longitudinal end of the box, and a slit is made with the saw blade only on the side of the drawn film. The content is to tear (cut) the film in the lateral (width) direction by tear propagation from the cut, and in that case, there is no saw blade mark on the edge of the film, so the occurrence of diagonal cutting can be prevented and As the tear strength in the direction is weakened, the effect of facilitating the cutting (tearing) is effective. Therefore, for the purpose of avoiding the uncertainty of the technology of tearing the film in the lateral (width) direction by tear propagation (the problem that the shape of the cutting edge is uneven), we aimed to cut along the teeth of a long saw blade. If
In the above-mentioned proposal of the above-mentioned Japanese Patent Laid-Open, in which the film is cut by the propagation of tearing, the object is different. Furthermore, there is no suggestion of cutting along the teeth of a long saw blade for the purposes of the present invention.

【００１２】なお、歯山のデザインに係る提案の多い紙
製鋸刃やプラスチック製鋸刃の文献はあえて引用してい
ない。その理由は、本願発明の対象は、従来（現行）の
長尺の金属製の鋸刃に生じている問題点を、同じ長尺の
金属製の鋸刃の歯山のデザインの変更で解消しようとす
るものであるのに対し、紙製鋸刃やプラスチック製鋸刃
の文献は、いずれも金属に比べて材質の特性上で生じて
しまうハンデイーを歯山のデザインで多少は補ない、現
行の金属製鋸刃の切断性能に少しでも近ずけることを内
容にしたものに過ぎず、解決課題も違うし得られた歯山
のデザインの切断性能の水準は全く違う（低い）から、
本願発明とは無関係な内容のものに過ぎないからであ
る。It should be noted that references to paper saw blades and plastic saw blades, which have many proposals regarding tooth flank design, are not cited. The reason is that the object of the present invention is to solve the problem that occurs in the conventional (current) long metal saw blade by changing the design of the tooth crests of the same long metal saw blade. In contrast to the paper saw blades and plastic saw blades, the literature does not compensate for the handy that occurs due to the characteristics of the material compared to metal in some cases. It is just a matter of approaching the cutting performance of metal saw blades as much as possible, the problem to be solved is different, and the level of cutting performance of the obtained tooth crest design is completely different (low),
This is because the content has nothing to do with the present invention.

【００１３】本発明は上記状況に鑑み、その目的とする
ところは、金属製鋸刃が箱から安全で容易に引き剥がせ
且つ、現在市販の金属製鋸刃が保有する指等を傷付けな
い安全性と高度な切断性能の確保及びその持続性と切断
音の四面のバランスを満たし、切断した後のフイルム
が、その切断端部から縦、横、斜めの方向（即ち意図し
ない方向）にフイルムが裂ける現象の発生を抑制するこ
とができるラップフイルム収納箱を提供することにあ
る。In view of the above situation, an object of the present invention is to ensure that a metal saw blade can be safely and easily peeled off from a box and that a finger currently held by a commercially available metal saw blade is not damaged. Of the film and the high cutting performance are ensured and the durability and cutting sound are balanced on all four sides. After cutting, the film is cut vertically, horizontally or diagonally (that is, in an unintended direction). An object of the present invention is to provide a wrap film storage box capable of suppressing the occurrence of the phenomenon of tearing.

【００１４】[0014]

【課題を解決するための手段】上記課題を解決するため
の本発明の構成は、柱状形の箱と箱の収納室に収納した
巻回フイルムと該箱に配備した長尺の金属製鋸刃からな
り、上記金属製鋸刃は、該鋸刃と同じ幅の薄膜状体を、
薄膜状体の端が該鋸刃端からはみ出す状態で該鋸刃面と
箱体面との間に介在させてカシメ爪で箱に固定されてい
るラップフィルム収納箱において、上記金属製鋸刃は、
下記ａ〜ｅの条件を満したものであり、且つ該鋸刃面と
箱体面との間に介在している上記薄膜状体は、該鋸刃の
脇端から鋸刃の長さの３％以上８％以下の範囲の長さ部
分のみに配したものであることを特徴とする。 ［金属製鋸刃の条件］ ａ．歯山の高さ：０．６０ｍｍ以下０．４０ｍｍ以上の
範囲 ｂ．歯山の傾斜角：５５度以上６５度以下の範囲 ｃ．歯山間のピッチ：１．４６ｍｍ以下０．７２ｍｍ以
上の範囲 ｄ．相隣れる歯山間の谷部の形状：０．３０ｍｍ以上
０．７０ｍｍ以下の範囲の長さの平坦状を形成 ｅ．歯山の先端形状：鋸刃の長手方向両端部に位置する
歯山と長手方向中央部に位置する歯山とは異なる円弧状
に形成されており、その円弧状は歯山の傾斜角を二等分
する仮想線上を中心に歯山の両稜線に接して描ける円の
円弧で示すとき、長手方向の両端部に位置する歯山は
０．０２ｍｍ以上０．０５ｍｍ以下の半径の円の円弧、
長手方向の中央部に位置する歯山は０．０５ｍｍを超え
０．０８ｍｍ以下の半径の円の円弧である。The structure of the present invention for solving the above problems is a columnar box, a winding film housed in a box storage chamber, and a long metal saw blade provided in the box. The metal saw blade comprises a thin film body having the same width as the saw blade,
In a wrap film storage box in which the edge of the thin film body is interposed between the saw blade surface and the box body surface in a state of protruding from the saw blade edge and fixed to the box by caulking claws, the metal saw blade is ,
The thin film-like body that satisfies the following conditions a to e and that is interposed between the saw blade surface and the box surface is 3 from the side edge of the saw blade to the saw blade length. It is characterized in that it is arranged only in the length portion in the range of 8% to 8%. [Conditions for metal saw blade] a. Height of tooth crest: range of 0.60 mm or less and 0.40 mm or more b. Inclination angle of tooth crest: range of 55 degrees or more and 65 degrees or less c. Pitch between teeth: range of 1.46 mm or less and 0.72 mm or more d. Shape of valley portion between adjacent tooth peaks: forming a flat shape having a length in the range of 0.30 mm or more and 0.70 mm or less e. Tip shape of tooth crest: The tooth crest located at both longitudinal end portions of the saw blade and the tooth crest located at the central portion in the longitudinal direction are formed in different arc shapes, and the arc shape defines the inclination angle of the tooth crests. When it is shown by a circular arc of a circle that can be drawn in contact with both ridgelines of the tooth peak centering on an imaginary line that divides equally, the tooth peaks located at both ends in the longitudinal direction are circular arcs with a radius of 0.02 mm to 0.05 mm,
The tooth crest located at the central portion in the longitudinal direction is an arc of a circle having a radius of more than 0.05 mm and 0.08 mm or less.

【００１５】以下、さらに本発明の内容を図面に基づい
て具体的に説明する。図１は、本発明の実施例に於ける
鋸刃の歯山を拡大して示す部分摸式図である。図２は、
図１に示す鋸刃で切断したフイルム端の拡大写真の部分
写生図である。図３は、従来（現行市販）品の箱に用い
ている鋸刃の歯山を拡大して示す部分摸式図で、図４
（Ａ）（Ｂ）は、夫々図３に示す鋸刃（従来品）で切断
したフイルム端の拡大写真の部分写生図で、図４（Ａ）
は『水平開き切り』をした場合のものを、図４（Ｂ）は
『持ち上げ切り』をした場合のものである。The contents of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a partial schematic view showing an enlarged tooth peak of a saw blade according to an embodiment of the present invention. Figure 2
FIG. 2 is a partial image drawing of an enlarged photograph of a film edge cut by the saw blade shown in FIG. 1. FIG. 3 is a partial schematic diagram showing an enlarged tooth peak of a saw blade used in a conventional (currently commercially available) box, and FIG.
(A) and (B) are partial sketches of enlarged photographs of the film edge cut by the saw blade (conventional product) shown in FIG. 3, respectively, and FIG.
Shows the case where "horizontal opening cut" is performed, and FIG. 4B shows the case where "lifting cut" is performed.

【００１６】この図１〜４では共通して、ジグザグ状に
描かれている実線（図に向かって右端）部分は鋸刃の歯
山、或いはフイルムの切断端であり、図２、４に描かれ
ている矢印はフイルムを切断した際の切断方向を示して
いる。図４に示す［従来品の鋸刃でのフイルム切断端］
において、先ず留意すべき事柄は、ジグザグ状切断端の
近傍に破線で示されている部分は、切断時にフイルムに
当接していた鋸刃の歯山の跡を、またジグザグ状切断端
の山裾や谷部の一部に髭状に示されている部分（Ｔ）
は、フイルムに入った亀裂部Ｔを、夫々示していること
である。尚、この図４（Ａ）（Ｂ）は、当該不良現象の
原因究明の一環として本発明者等が工夫を重ねてようや
く撮影に成功した図でもある。Commonly shown in FIGS. 1 to 4, a solid line (the right end in the figure) drawn in a zigzag shape is a tooth edge of a saw blade or a cut end of a film, and is shown in FIGS. The arrow shown indicates the cutting direction when the film is cut. Fig. 4 [Film cutting edge with conventional saw blade]
In the above, the first thing to note is that the portion shown by the broken line in the vicinity of the zigzag cut edge shows the traces of the tooth flanks of the saw blade that was in contact with the film at the time of cutting, and the hem of the zigzag cut edge and The beard-like part in a part of the valley (T)
Shows the cracks T entering the film, respectively. Note that FIGS. 4A and 4B are also diagrams in which the inventors finally succeeded in photographing as a part of investigating the cause of the defective phenomenon.

【００１７】鋸刃の比較を容易にするために、鋸刃の歯
山のデザインとその結果（亀裂部Ｔの発生率）とを一覧
にすると次の表１のようになる。傾斜角は一定にしピッ
チでデザインを調整してある。In order to facilitate the comparison of the saw blades, the following table 1 shows a list of the tooth flanks of the saw blades and the results (rate of occurrence of the crack portion T). The inclination angle is fixed and the design is adjusted by the pitch.

【００１８】[0018]

【表１】 [Table 1]

【００１９】補足すると、例えば図１と図３との鋸刃形
状の比較は、表１に示す通りで本発明品と従来品の鋸刃
形状の比較に当たる。歯山の山の高さ（山の頂の仮想線
と谷の底の仮想線間の距離）は、現実寸法での比較で、
従来品（図３）の高さ（１．０ｍｍ）に対して本発明品
（図１）の高さ（０．５０ｍｍ）は、約１／２と低くな
っていることが分かる。尚、この図１と図３の例では、
歯山の傾斜角（山の稜線間の角度）を一定（６０度）に
揃えてあるので、ピッチ（山の中心仮想線間の距離）
を、各々１．１６ｍｍと１．０８ｍｍにすることで山の
高さの差を調整している。Supplementally, for example, the comparison of the saw blade shapes of FIG. 1 and FIG. 3 corresponds to the saw blade shapes of the present invention product and the conventional product as shown in Table 1. The height of the crest of the tooth (the distance between the imaginary line at the top of the mountain and the imaginary line at the bottom of the valley) is a comparison with actual dimensions
It can be seen that the height (0.50 mm) of the product of the present invention (FIG. 1) is about 1/2 that of the conventional product (FIG. 3) (1.0 mm). Incidentally, in the example of FIGS. 1 and 3,
Pitch (distance between virtual imaginary lines of the center of the mountain) because the inclination angle of the tooth crests (angle between the ridges of the mountains) is kept constant (60 degrees).
Are adjusted to 1.16 mm and 1.08 mm, respectively, to adjust the height difference of the peaks.

【００２０】本発明者等が、上記図４（Ａ）（Ｂ）を用
いて、当該不良現象の原因を考察した結果（即ち発明の
背景）をまとめると下記のようになる。即ち、 ａ）フイルムに当接していた鋸刃の歯山の跡（破線部）
の形状と、実際に切断されたフイルム端の形状とがずれ
ていることから考察すると、この場合のフイルムの切断
は、必ずしも当接した歯山の山の稜線に沿って切断され
ているのではなく、歯山の先で穿たれた切断開始点から
引き裂き伝播によって生じるフイルムの破断現象が伴な
っている。 ｂ）ジグザグ状切断端の山裾部や谷部の一部に生じた亀
裂部Ｔは、上述した引き裂き伝播の破断が過剰に進行し
た部分であり、この過剰の進行は、相隣れる双方の歯山
から進行する破断の時間的（或いは方向的）な違いによ
ってその双方の破断が合流する機会（位置）がずれたこ
とにより生じたものである。 ｃ）意図しない方向にフイルムが裂ける現象は、剥ぎ採
る時に摘んだフイルムの切断端部に存在していた亀裂部
Ｔに基ずくものである。即ち、係止力による抵抗と剥ぎ
採る張力との間に生じた力が亀裂部Ｔに集中し、その亀
裂部Ｔから引き裂き伝播による破断が進行するのであ
る。従ってその進行方向は、亀裂部Ｔの存在位置や亀裂
部Ｔの先端形状により、或いはフィルムの配向方向や樹
脂の結晶構造に沿って、縦、横、斜めの方向（即ち意図
しない方向）に破断することになる。 ｄ）よって『意図しない方向へのフイルムの破断』は、
係止力による抵抗と剥ぎ採る張力との間で生じた力が大
きい時に、そこに存在していた亀裂部Ｔで生じるもので
あるが、素材自体の引き裂き強度が大きいフイルムの場
合は、仮に亀裂部Ｔが存在していてもフイルムが破断す
ることはまずない。The following is a summary of the results (that is, the background of the invention) of the present inventors considering the cause of the defective phenomenon using FIGS. 4 (A) and 4 (B). That is, a) Traces of tooth flanks of the saw blade that were in contact with the film (broken line portion)
Considering from the fact that the shape of the film and the shape of the actually cut film edge are deviated, the cutting of the film in this case is not always cut along the ridge line of the crest of the tooth crest that abuts. However, there is a rupture phenomenon of the film caused by the tear propagation from the cutting start point made at the tip of the tooth crest. b) The crack portion T generated in a part of the crests and valleys of the zigzag cut end is a portion where the above-mentioned tear propagation rupture is excessively advanced, and this excessive progression is caused by the two adjacent teeth. This is caused by the difference in the time (or direction) of the breaks progressing from the mountain and the opportunity (position) at which both breaks merged. c) The phenomenon that the film is torn in an unintended direction is based on the crack T existing at the cut end of the film picked up at the time of peeling. That is, the force generated between the resistance due to the locking force and the peeling tension concentrates on the crack portion T, and the fracture due to the tear propagation progresses from the crack portion T. Therefore, the traveling direction is broken in the longitudinal, lateral, or diagonal directions (that is, unintended directions) depending on the existence position of the crack portion T, the tip shape of the crack portion T, or along the orientation direction of the film or the crystal structure of the resin. Will be done. d) Therefore, "breaking the film in an unintended direction"
When the force generated between the resistance due to the locking force and the peeling tension is large, it is generated at the crack portion T existing there, but in the case of a film having a large tear strength of the material itself, it is assumed that the film is cracked. Even if the section T exists, the film is unlikely to break.

【００２１】一方、本発明は、下記イ）ロ）の点で従来
技術とその構成を相違する。尚、このイ）ロ）の分説
は、説明の理解を深めるためのものである。 イ）採用する金属製鋸刃は、その歯山の高さが０．８０
ｍｍ以下０．４０ｍｍ以上、相隣れる歯山間の谷部は、
０．３０ｍｍ以上０．７０ｍｍ以下の範囲の平坦状に形
成された谷底部を有した形状であり、歯山の傾斜角が５
５度以上６５度以下、歯山間のピッチが１．４６ｍｍ以
下０．７２ｍｍ以上の範囲とすること。 ロ）歯山の先端形状は、鋸刃の長手方向両端部に位置す
る歯山と長手方向中央部に位置する歯山とは異なる円弧
状に形成されており、その円弧状は歯山の傾斜角を二等
分する仮想線上を中心に歯山の両稜線に接して描ける円
の円弧で示すとき、長手方向の両端部に位置する歯山
は、０．０２ｍｍ以上０．０５ｍｍ以下の半径の円の円
弧、長手方向の中央部に位置する歯山は０．０５ｍｍを
超え０．０８ｍｍ以下の半径の円の円弧であり、薄膜状
体が金属製鋸刃と箱との間に介在している部分の長さ
は、該鋸刃の脇端から該鋸刃の長さの３％以上８％以下
の範囲のものとすること。On the other hand, the present invention differs from the prior art in the following points a) and b). Incidentally, the reasoning of (a) and b) is to deepen the understanding of the explanation. B) The metal saw blade used has a tooth height of 0.80.
mm or less 0.40 mm or more, the valley between adjacent tooth peaks is
The shape has a valley bottom formed in a flat shape in the range of 0.30 mm or more and 0.70 mm or less, and the inclination angle of the tooth crest is 5
It should be in the range of 5 degrees or more and 65 degrees or less and the pitch between the tooth peaks of 1.46 mm or less and 0.72 mm or more. (B) The tip shape of the tooth crest is formed in an arc shape different from the tooth crest located at both ends in the longitudinal direction of the saw blade and the tooth crest located at the center in the longitudinal direction, and the arc shape is the inclination of the tooth crest. When indicated by a circular arc of a circle that can be drawn by contacting both ridge lines of a tooth center on an imaginary line that bisects a corner, tooth teeth located at both ends in the longitudinal direction have a radius of 0.02 mm or more and 0.05 mm or less. The circular arc, the tooth crest located in the central portion in the longitudinal direction is a circular arc having a radius of more than 0.05 mm and 0.08 mm or less, and the thin film body is interposed between the metal saw blade and the box. The length of the existing portion should be within the range of 3% to 8% of the length of the saw blade from the side edge of the saw blade.

【００２２】以下、ａ）〜ｄ）の考察に添って、前述の
従来技術と相違する構成要件の技術的意義を説明する。
先ず上記要件イ）の内の［鋸刃の歯山の高さを０．８０
ｍｍ以下に低め、且つ平坦状に形成された谷底部を有す
る］ことの技術的意義について述べる。まず鋸刃の歯山
の高さを０．８０ｍｍ以下に低めたことの技術的意義
は、フイルム切断の進行をできるだけ鋸刃を構成する歯
山の形状縁に沿った切断に近づけるためのものである。
そのことにより、上記考察ａ）で言う『切断開始点から
の引き裂き伝播によりフイルムの破断』が伴う場合で
も、考察ｂ）で言う『破断の合流のずれ』が小さくなる
ので亀裂部Ｔの発生を少なくすることができ、結果的に
剥ぎ採る際の『意図しない方向へのフイルムの破断』の
発生を抑制する効果が得られる。The technical significance of the constituents different from the above-mentioned prior art will be described below based on the consideration of a) to d).
First, in [Requirement a), [The height of the tooth flank of the saw blade is 0.80.
It has a valley bottom portion formed to have a flatness and a height of less than mm]. First of all, the technical significance of reducing the height of the tooth edge of the saw blade to 0.80 mm or less is to make the progress of film cutting as close as possible to the cutting along the shape edge of the tooth edge forming the saw blade. is there.
As a result, even when "the film breaks due to the tear propagation from the cutting start point" in the above consideration a), the "deviation of the merging of the breaks" in the consideration b) becomes small, so that the occurrence of the crack T is prevented. The amount can be reduced, and as a result, an effect of suppressing "breakage of the film in an unintended direction" during stripping can be obtained.

【００２３】次に『平坦状谷底部』の役割について述べ
る。役割の第１は、個々の歯山について、歯先の切断開
始点から歯山の形状に沿う引き裂き伝播によるフイルム
の破断のその進行が、『平坦状谷底部』で押え留められ
上記考察ｂ）で言う『双方の破断が合流する機会（位
置）のずれ』を防ぐことにある。そして役割の第２は、
平坦状谷底部の寸法を規定幅に置くことで歯山の先にか
かる張力 （フイルムの押圧）の集中性が高まり、歯山
の切断開始点の『位置ずれ』を小さくして、結果的に歯
山の形状に沿う切断を促がすことである。この二つの役
割は共に、亀裂部Ｔの発生を抑制する効果に繋がるもの
である。付随的な効果では、歯山のピッチが広がりが観
測されている。Next, the role of the "flat valley bottom" will be described. The first of the roles is that for each tooth crest, the progress of the rupture of the film due to the tear propagation along the shape of the tooth crest from the cutting start point of the tooth tip is restrained at the "flat valley bottom" and the above consideration b). The purpose is to prevent the "opportunity (position) of both breaks joining". And the second role is
Placing the dimension of the flat valley bottom to the specified width increases the concentration of the tension (film pressing) applied to the tip of the tooth crest, reducing the “positional deviation” at the cutting start point of the tooth crest, and as a result It is to promote cutting along the shape of the tooth crest. Both of these two roles lead to the effect of suppressing the generation of the crack portion T. As an ancillary effect, a widening of the tooth pitch is observed.

【００２４】この両者での切断端を比較すると、図４
（Ａ）［従来の山のもの］に比べて図２［山を低くし、
平坦状谷底部を有したもの］は、フイルムに当接してい
た鋸刃の歯山の跡（破線部）と実際に切断されたフイル
ムの切断端との間の、位置及び形状の双方での『ずれが
小さくなる』改善がなされていて、亀裂部Ｔの発生率も
約９０％分は少なく且つ若干発生している亀裂部Ｔも小
さくなっている。Comparing the cut ends of the two, FIG.
(A) Compared to the [conventional mountain], Fig. 2 [Lower the mountain,
With a flat valley bottom], both the position and the shape between the trace of the tooth flanks of the saw blade (broken line part) that was in contact with the film and the cut end of the actually cut film are The "deviation is small" has been improved, the occurrence rate of the crack portion T is small by about 90%, and the crack portion T which is slightly generated is also small.

【００２５】ここで言う『平坦状谷底部』の意味は、通
常の鋸刃での歯山間は、その山裾の谷底部はＶ字状に形
成されているのが一般的であるのに対し、本発明の鋸刃
では平らな谷部であることを象徴的に表現している。従
って、必ずしも「真っ平らなもの」である必要はなく、
例えば、見た目で平らな谷部であることが明らかである
ような、要するに『歯先から引き裂き伝播による破断の
進行が抑止される平らかさ』があれば充分なものであ
る。しかし一方、鋸刃の加工は、雄型・雌型の一対の型
で挟み切る所謂剪断力によるのが一般的であるので、対
の型の噛み合わせを確実に且つ円滑にするために、例え
ば歯山の裾と谷底部との交点に小さな曲率半径のアール
を採ったりすることがあり、その立ち上がりの部分は必
ずしも平坦とは言えない場合もある。そこで本発明で
は、『平坦状谷底部』を、その実寸法である『平坦状谷
底部の（幅）寸法』を規定し、構成として表示してい
る。The term "flat valley bottom" as used herein means that, between the tooth peaks of a normal saw blade, the valley bottom of the crest is generally V-shaped. The saw blade of the present invention symbolically represents a flat valley. Therefore, it does not necessarily have to be "flat".
For example, it is sufficient to have "a flatness in which the progress of fracture due to tear propagation from the tooth tip is suppressed", which is apparently a flat valley. On the other hand, on the other hand, the processing of the saw blade is generally performed by so-called shearing force that is sandwiched between a pair of male and female dies, so in order to surely and smoothly engage the pair of dies, for example, The radius of curvature may be rounded at the intersection between the bottom of the tooth crest and the bottom of the valley, and the rising portion may not always be flat. Therefore, in the present invention, the "flat valley bottom portion" is defined as the actual dimension "the (width) dimension of the flat valley bottom portion" and is displayed as a configuration.

【００２６】また、本発明者等の研究結果によると、上
述の効果の発現には次の点に留意すべきことが確認され
る。即ち、先ず歯山の高さは０．６０〜０．４０ｍｍの
範囲から選択することが必要である。それは０．６０ｍ
ｍを超えて高いものでは、亀裂部Ｔの発生率を１０％程
度以下に抑制する効果が期待できないし、逆に歯山の高
さが０．４０ｍｍ未満の低いものでは、フイルムへの切
断性能の低下する問題と、更には加工精度が保ち難くな
る問題が生じるからである。一方、切断性能を確保しよ
うと歯山の傾斜角を５５度未満に小さくする方向は、亀
裂部Ｔの発生を抑制する効果がない。逆に歯山の傾斜角
を６５度を超えて大きくする方向は、フイルムへの歯の
食込みが悪くなり切断性能を低下させる傾向にあり、切
断音の爽快感も悪化する。平坦状谷底部分の寸法は、
０．７０〜０．３０ｍｍの範囲のものにすることが必要
である。理由は、０．７０ｍｍを超えて大きい場合は上
記考察ｂ）で言う『破断が合流する機会のずれ』が大き
すぎて、亀裂部Ｔが平坦状谷底部の延長線の方向に発生
する傾向があり、亀裂部Ｔの発生率を１０％程度以下に
抑制する効果が期待できない、逆にその寸法が０．３０
ｍｍ未満と小さいものでは、破断の進行を押し留める効
果が期待できない傾向にある。鋸刃の長手の全長に亘っ
てほぼ一定ピッチの歯山が配されたものを対象物として
表現している関係で、その対象物での歯山のピッチは、
歯山の高さが決まり且つ歯山の傾斜角が決まり且つ平坦
状谷底部の寸法が決まると、おのずから定まってしまう
性格のものである。従って本発明で示す歯山のピッチ
１．４６〜０．７２の範囲規定は、歯山の高さや歯山の
傾斜角や平坦状谷底部の寸法を上述した規定の範囲に定
めた時に採用される寸法の範囲を具体的に開示したもの
である。しかしながら、ここで規定した歯山の高さや歯
山の傾斜角、平坦状谷底部の寸法および歯山のピッチの
数値規定は、いずれも亀裂部Ｔの発生の抑制と切断性能
の維持との双方の調和を図る観点から選択されたもので
あるので、これ等の規定範囲を満たすものであれば、鋸
刃の長手に歯山の高さ、歯山の傾斜角、平坦状谷底部の
寸法および歯山のピッチを不均一に配置したものや、長
手の局部に選択的に違えた配置をしたもの等でも、亀裂
部Ｔの発生の抑制と切断性能の維持との双方に、充分な
効果を発揮するものであることは当然に予測されること
である。Further, according to the research results of the present inventors, it is confirmed that the following points should be noted in the manifestation of the above effects. That is, first, it is necessary to select the height of the tooth crest from the range of 0.60 to 0.40 mm. It is 0.60m
If it is higher than m, the effect of suppressing the occurrence rate of the crack portion T to about 10% or less cannot be expected, and conversely, if the height of the tooth crest is lower than 0.40 mm, the cutting performance to the film is high. This is because there is a problem that the machining accuracy is lowered, and further, it becomes difficult to maintain the processing accuracy. On the other hand, the direction in which the inclination angle of the tooth crest is reduced to less than 55 degrees in order to secure the cutting performance has no effect of suppressing the generation of the crack T. On the contrary, in the direction in which the inclination angle of the tooth crest is increased to more than 65 degrees, the biting of the teeth into the film is deteriorated, the cutting performance tends to be deteriorated, and the refreshing feeling of the cutting sound is also deteriorated. The size of the flat valley bottom is
It is necessary to set it in the range of 0.70 to 0.30 mm. The reason is that when it is larger than 0.70 mm, the “difference in opportunity of merging fractures” mentioned in the above consideration b) is too large, and the crack T tends to occur in the direction of the extension line of the flat valley bottom. Yes, the effect of suppressing the occurrence rate of the crack portion T to about 10% or less cannot be expected, and conversely the size is 0.30.
If it is as small as less than mm, there is a tendency that the effect of restraining the progress of fracture cannot be expected. The pitch of tooth flanks on the object is represented by a relationship in which tooth flanks having a substantially constant pitch are arranged over the entire length of the saw blade as an object.
When the height of the tooth crests is determined, the inclination angle of the tooth crests is determined, and the size of the flat valley bottom is determined, it is naturally determined. Therefore, the definition of the range of the tooth crest pitch 1.46 to 0.72 shown in the present invention is adopted when the height of the tooth crest, the inclination angle of the tooth crest, and the dimension of the flat valley bottom portion are set within the above-described prescribed ranges. It specifically discloses the range of dimensions. However, the numerical specifications of the height of the tooth crest, the inclination angle of the tooth crest, the dimension of the flat valley bottom, and the pitch of the tooth crest specified here are both for suppressing the occurrence of the crack T and maintaining the cutting performance. Since it was selected from the viewpoint of harmonizing the above, the height of the tooth crest, the inclination angle of the tooth crest, the size of the flat valley bottom and Even if the pitch of the tooth crests is non-uniformly arranged, or even if it is arranged differently in the longitudinal part, a sufficient effect can be obtained both in suppressing the occurrence of cracks T and maintaining cutting performance. Of course, it is expected that it will work.

【００２７】次に、要件ロ）の［歯山の先端形状は、鋸
刃の長手方向両端部に位置する歯山と長手方向中央部に
位置する歯山とは異なる円弧状に形成されており、その
円弧状は歯山の傾斜角を二等分する仮想線上を中心に歯
山の両稜線に接して描ける円の円弧で示すとき、長手方
向の両端部に位置する歯山は０．０２ｍｍ以上０．０５
ｍｍ以下の半径の円の円弧、長手方向の中央部に位置す
る歯山は０．０５ｍｍを超え０．０８ｍｍ以下の半径の
円の円弧であり、薄膜状体が金属製鋸刃と箱との間に介
在している部分の長さは該鋸刃の脇端から該鋸刃の長さ
の３％以上８％以下の範囲のものとすること。］の技術
的意義について述べる。Next, the tip shape of the tooth crest of requirement b) is formed in an arc shape different from the tooth crest located at both longitudinal ends of the saw blade and the tooth crest located at the longitudinal center thereof. , The arc shape is a circle that can be drawn in contact with both ridge lines of the tooth center around a virtual line that bisects the inclination angle of the tooth crest, and the tooth peaks located at both ends in the longitudinal direction are 0.02 mm. 0.05 or more
An arc of a circle with a radius of less than or equal to mm, a tooth crest located at the center in the longitudinal direction is an arc of a circle with a radius of greater than 0.05 mm and less than or equal to 0.08 mm, and the thin film-shaped body is composed of a metal saw blade and a box. The length of the intervening portion should be in the range from 3% to 8% of the length of the saw blade from the side edge of the saw blade. ] The technical significance of

【００２８】本発明者等は、上述の要件イ）を満たす形
状の鋸刃を、図５に示した収納箱に採用した際、即ち箱
体と鋸刃の間の鋸刃長手方向全域に薄膜状体を介在させ
てカシメ固定した際、亀裂の抑制効果が充分に発揮され
ないと言う問題に遭遇した。この問題の原因は次の現象
による。即ち、薄膜状体は、鋸刃となる金属薄板と一緒
に金型で切断されるため鋸刃と同じ幅で同じ歯山形状を
呈し、実用上フィルム切断の障害にならないはずであ
る。しかし微視的に観察すれば、鋸刃の歯山先端部分は
薄膜状体が若干覆い被さっている。この覆い被さりが歯
山先端のフィルムへの穿孔を不安定なものにしてしま
う。そして結果的にフィルムの切断が当接した歯山の山
の稜線に沿って進行せず引き裂き伝播となり、歯山から
進行する引き裂き伝播切断の合流位置がずれたことによ
り亀裂が発生する現象である。又、この歯山の先端を覆
う薄膜状体が亀裂の発生に大きく作用するようになった
のは、歯山を従来より低めたことで生じた現象でもあ
る。The inventors of the present invention have adopted a saw blade having a shape satisfying the above requirement (a) in the storage box shown in FIG. 5, that is, a thin film over the entire area of the saw blade in the longitudinal direction between the box body and the saw blade. We encountered a problem that the effect of suppressing cracks was not fully exerted when caulking and fixing by interposing a sheet. The cause of this problem is due to the following phenomenon. That is, since the thin film body is cut with a metal mold together with a metal thin plate serving as a saw blade, the thin film body has the same width and the same tooth profile as the saw blade, and should not be an obstacle to film cutting in practical use. However, when viewed microscopically, the tip of the tooth crest of the saw blade is slightly covered with a thin film. This covering cover makes the perforations in the film at the tip of the tooth crests unstable. As a result, the cutting of the film does not proceed along the ridgeline of the crest of the abutting tooth and propagates as a tear, and the cracking occurs because the confluence position of the tear propagation cutting progressing from the tooth crest is displaced. . Further, the fact that the thin film-like body covering the tip of the tooth crests has a great influence on the occurrence of cracks is also a phenomenon caused by making the tooth crests lower than before.

【００２９】ここで本発明者等は、この現象対策を検討
した結果、以下の様な知見を得た。即ち、 歯山先端の円弧は小さくすると薄膜状体の覆い被さり
が小さくなり、亀裂の抑制に繋がる。しかしこの様な鋸
刃は、フィルム切断時の切断音が従来の音とは異質な
（例えれば音もなく切れる）ものとなる。逆に、歯山先
端の円弧が大きい鋸刃は、薄膜状体の覆い被さりが大き
く亀裂の発生も多く、しかもフィルムの切断音が従来品
の音とは異質な（例えればバリバリという切断音）もの
となる。つまり、箱体面と鋸刃面の間の全長に薄膜状体
を介在させた状態のままでは亀裂発生の抑制と適切な切
断音との調和がとれた鋸刃は得られない。 他方、箱体面と鋸刃面の間に介在させる薄膜状体は、
鋸刃の引き剥がしを容易に確実にする上では必要なもの
である。しかもこの薄膜状体は、鋸刃の引き剥がし時に
おいて、途中でちぎれたり抜けたり等の不都合が生じな
いようにするには、ある程度の長さが必要である。As a result of studying measures against this phenomenon, the present inventors have obtained the following findings. That is, if the circular arc at the tip of the tooth crest is made small, the covering of the thin film body becomes small, which leads to suppression of cracks. However, with such a saw blade, the cutting sound at the time of cutting the film is different from the conventional sound (for example, it cuts without sound). On the other hand, a saw blade with a large arc at the tip of the tooth crest has a large amount of thin film covering and many cracks, and the cutting sound of the film is different from the sound of the conventional product (for example, the cutting sound of burrs). Will be things. In other words, a saw blade in which crack generation is suppressed and an appropriate cutting sound is tuned cannot be obtained in a state where the thin film body is interposed in the entire length between the box surface and the saw blade surface. On the other hand, the thin film-like body interposed between the box surface and the saw blade surface is
It is necessary to easily and reliably remove the saw blade. Moreover, this thin film body needs to have a certain length in order to prevent inconveniences such as tearing and falling off during the peeling of the saw blade.

【００３０】要件ロ）は、上記知見を基にした研究によ
り、ようやく見いだされたものである。即ち、要件ロ）
の意味するところは要するに、介在させる薄膜状体は、
鋸刃の引き剥がしの容易性を満たす長さの必要最小限に
留め、その状態下で採用する鋸刃の歯山を、亀裂発生の
抑制と切断音の適性化との双方を満たせるものにしたこ
との意味である。又、一般に歯山の先端に配する円弧
は、その大きさでともすれば歯山の高さを低めることに
なるし、歯山のピッチや傾斜角を小さくすることが円弧
を小さくした様に錯誤する。しかし本発明では、この様
な円弧の調整は本意でない。従って本発明では、歯山の
基本寸法は一定にして、その下で歯山の円弧のみを調整
することにし、前者と混同しない様にしている。そし
て、円弧は歯山の傾斜角を二等分する仮想線上を中心に
歯山の両稜線に接して描ける円の円弧で示し、その円弧
の大きさは円の半径で示す。The requirement (b) is finally found by the research based on the above findings. That is, requirement b)
In short, what is meant by the
The length of the saw blade that can be easily peeled off is kept to the minimum necessary, and the teeth of the saw blade used under that condition are made to satisfy both the suppression of crack generation and the optimization of cutting noise. It means that. Further, generally, the arc arranged at the tip of the tooth crest lowers the height of the tooth crest if its size is large, and reducing the pitch and inclination angle of the tooth crest is similar to making the arc smaller. Make a mistake. However, in the present invention, such adjustment of the circular arc is not intended. Therefore, in the present invention, the basic dimension of the tooth crest is made constant, and only the arc of the tooth crest is adjusted below the tooth crest so as not to be confused with the former. The circular arc is shown by a circular arc that can be drawn in contact with both ridgelines of the tooth center around an imaginary line that bisects the inclination angle of the tooth crest, and the size of the circular arc is shown by the radius of the circle.

【００３１】要件ロ）の薄膜状体が該鋸刃面と箱体面と
の間に介在している部分の長さの役割は、鋸刃の引き剥
がしの容易性の確保である。そしてその長さは該鋸刃の
脇端から該鋸刃の長さの３％以上８％以下の範囲が必要
である。３％未満の場合は、薄膜状体が途中でちぎれた
りはずれたりし、鋸刃の引き剥がしに不都合が生じ、鋸
刃の引き剥がしの容易性が確保できない。又、８％を超
えて長い場合は、従来品と同質の切断音の発現が歯山の
先端の円弧の半径の調節では不可能な領域である。The role of the length of the portion of the requirement (b) in which the thin film body is interposed between the saw blade surface and the box surface is to ensure the ease of peeling the saw blade. Further, the length thereof needs to be in the range of 3% to 8% of the length of the saw blade from the side edge of the saw blade. When it is less than 3%, the thin film body may be torn or peeled off in the middle of the film, which causes a trouble in peeling off the saw blade, and the ease of peeling off the saw blade cannot be ensured. On the other hand, when the length is more than 8%, the cutting noise of the same quality as that of the conventional product cannot be expressed by adjusting the radius of the arc of the tip of the tooth crest.

【００３２】上記要件ロ）で言う歯山の先端形状は、鋸
刃の長手方向両端部に位置する歯山と長手方向中央部に
位置する歯山とは異なる円弧状に形成することで、フィ
ルム切断開始より終了までに連続的に発生する切断音
を、全体として従来品と同質の切断音に発現させる役割
をもつ。鋸刃の長手方向の両端部に位置する歯山（薄膜
状体を介在させたい部分）の先端の円弧はその半径を、
０．０２ｍｍ以上０．０５ｍｍ以下の範囲にする必要が
ある。この円弧の半径が０．０２ｍｍ未満の場合は、従
来品と同質の切断音の発現が歯山（薄膜状体を介在させ
ない部分）の先端の円弧の半径の調節だけでは不可能な
範囲であり、０．０５ｍｍを超える場合は、亀裂の抑制
効果が期待できない。The tip shape of the tooth crest referred to in the above requirement (b) is formed by forming an arc shape different from the tooth crest located at both longitudinal end portions of the saw blade and the tooth crest located at the central portion in the longitudinal direction of the saw blade. It has the role of expressing the cutting sound that continuously occurs from the start to the end of cutting to the cutting sound of the same quality as the conventional product as a whole. The radius of the arc of the tip of the tooth crest (the part where the thin film material is to be interposed) located at both ends in the longitudinal direction of the saw blade is
It must be in the range of 0.02 mm or more and 0.05 mm or less. If the radius of this arc is less than 0.02 mm, the same cutting noise as that of the conventional product cannot be produced by adjusting the radius of the arc of the tip of the tooth crest (the portion where no thin film material is interposed). , 0.05 mm, the effect of suppressing cracks cannot be expected.

【００３３】鋸刃の長手方向の中央部に位置する歯山
（薄膜状体を介在させない部分）の先端の円弧はその半
径を、０．０５ｍｍを超え０．０８ｍｍ以下の範囲にす
る必要がある。この円弧の半径が０．０５ｍｍ以下の場
合は従来品と同質の切断音の発現が不可能なものとな
り、０．０８ｍｍを超える場合は、要件イ）により歯山
を低くしたことによる切断性の低下が補えない。The radius of the arc of the tip of the tooth crest (the portion in which the thin film-like body is not interposed) located in the central portion of the saw blade in the longitudinal direction must have a radius of more than 0.05 mm and 0.08 mm or less. . When the radius of this arc is 0.05 mm or less, it is impossible to produce cutting sound of the same quality as the conventional product, and when it exceeds 0.08 mm, the cutting property due to the lowering of the tooth peak due to requirement a) The decrease cannot be compensated.

【００３４】鋸刃面と箱体面との間に介在している薄膜
状体の脇端からの長さの位置と、上記半径が０．０２ｍ
ｍ以上０．０５ｍｍ以下の円弧で示される歯山の位置と
は同じ位置であること、即ち該鋸刃の脇端から該鋸刃の
長さの３％以上８％以下の範囲であることが望ましい。
その理由は、鋸刃の引き剥がしの容易性と亀裂の抑制効
果が最高水準で確保されているからである。しかし、薄
膜状体の位置と半径が０．０２ｍｍ以上０．０５ｍｍ以
下の円弧で示される歯山の位置とが数ピッチ程度ズレて
いても実用上に支障はない。それは亀裂の抑制効果、切
断音の調和に若干の影響を及ぼす程度だからである。薄
膜状体の配する位置をあえて％で表示した意図は、ラッ
プフィルム収納箱に用いる鋸刃には、例えば、約１５ｃ
ｍ、２２ｃｍ、３０ｃｍ、４５ｃｍ長の各種のものがあ
り、寸法の絶対値ではこれら全てについて的確な表現と
ならないためである。The position of the length from the side edge of the thin film body interposed between the saw blade surface and the box surface and the above radius are 0.02 m.
The position of the tooth crest represented by an arc of m or more and 0.05 mm or less is the same position, that is, the range from the side edge of the saw blade to 3% or more and 8% or less of the length of the saw blade. desirable.
The reason is that the ease of peeling the saw blade and the effect of suppressing cracks are secured at the highest level. However, there is no practical problem even if the position of the thin film and the position of the tooth crest represented by the arc having a radius of 0.02 mm or more and 0.05 mm or less are deviated by several pitches. This is because the crack suppression effect and the harmony of the cutting sound are slightly affected. The intention of displaying the position where the thin film body is arranged in% is that the saw blade used for the wrap film storage box has, for example, about 15c.
This is because there are various types of m, 22 cm, 30 cm, and 45 cm in length, and the absolute values of the dimensions do not give accurate representations of all of them.

【００３５】本発明が対象とするフイルムは、ＪＩＳ−
Ｐ８１１６に準拠した引裂き強度が２ｇ以上６ｇ以下の
ものが望ましい。つまり、『その引裂き強度の絶対値が
小さい』ものが望ましい。「意図しない方向にフイルム
が裂ける現象」は、上述の考察ｄ）で説明しているよう
に、亀裂部Ｔで弱められたフイルムの引裂強度が、仮留
め部が持つ係止力を下回る時に生じる現象である。よっ
て元の引裂強度の絶対値が６ｇを超えて大きいフイルム
では前記の係止力を下回ることがないので、本発明の対
象とはしないと言う意味である。換言すれば、フイルム
が持つ引裂強度の絶対値が小さいものほど、亀裂部の存
在で生じる強度低下の悪影響は、仮留め部の持つ係止力
との問題のみに留まらず、例えば、引き出し操作上のわ
ずかな過剰張力を受けた場合でも『直ちに伝播破断の発
生』につながってしまう。従って包装用のフイルムでは
一般に引裂強度は少なくとも約２ｇは備えていることに
なる。この様な裂け易い性質のフイルムが本発明の対象
品であることを意味している。具体的には例えば、塩化
ビニリデン系樹脂の肉厚が６〜１８μｍ２軸延伸フイル
ム等は、そのものの引裂強度（縦横の平均値）が、通常
の市販品で約２〜６ｇ、肉厚を９〜１６μｍの範囲から
厳選したものでも約３〜４ｇの範囲の低い値を示すの
で、本発明での最適な対象品となる。The film to which the present invention is directed is JIS-
It is desirable that the tear strength according to P8116 is 2 g or more and 6 g or less. In other words, "the absolute value of the tear strength is small" is desirable. The "phenomenon in which the film tears in an unintended direction" occurs when the tear strength of the film weakened at the crack portion T is less than the locking force of the temporary fastening portion, as described in consideration d) above. It is a phenomenon. Therefore, a film having an original tear strength of more than 6 g and having a large absolute value does not fall below the locking force, which means that the film is not an object of the present invention. In other words, the smaller the absolute value of the tear strength of the film is, the adverse effect of the strength decrease caused by the presence of the crack is not limited to the problem of the locking force of the temporary fastening part. Even if it receives a slight excess tension, it will lead to "immediate propagation fracture". Thus, packaging films will generally have a tear strength of at least about 2 grams. This means that a film having such a tearable property is the object of the present invention. Specifically, for example, a vinylidene chloride resin having a wall thickness of 6 to 18 μm and a biaxially stretched film or the like has a tear strength (average length and width) of about 2 to 6 g for a normal commercial product and a wall thickness of 9 to Even if carefully selected from the range of 16 μm, it shows a low value in the range of about 3 to 4 g, so that it is an optimum target product in the present invention.

【００３６】つまり本発明では、縦横の引裂強度の比で
生じる伝播破断の切断を利用するものではなく、伝播破
断の切断が生じ易い引裂強度の絶対値の小さいフイルム
の切断をどう長尺鋸刃の歯山に沿わせるかを課題にした
発明である。上述した本発明の利点の説明は、図５で代
表されるような板紙でできた四角柱状で、しかも箱体の
掩蓋片の先に全体の形状が直状の金属製鋸刃を配した実
用性に優れていて望ましい収納箱に重点を置いて行なっ
ているが、発明の効果の発現は鋸刃の歯山の形状・デザ
インに基ずくものであることは明白である。従って例え
ば箱の材質はプラスチック、木、金属等の薄板であって
もよく、また箱断面の柱状形が、円形状、楕円形状、或
いは３角形以上の多角形状等のもであっても利用でき
る。更に鋸刃の全体形状や鋸刃の取り付け位置も、図５
の例示に留まらず従来公知の全てのものに応用すること
は可能である。In other words, the present invention does not utilize the cutting of the propagation rupture that occurs in the ratio of the vertical and horizontal tear strengths, but how to cut a film having a small absolute value of the tear strength which easily causes the propagation rupture. It is an invention to solve the problem of whether to follow the tooth crests of. The above description of the advantages of the present invention is made by arranging a metal saw blade having a rectangular columnar shape made of paperboard as shown in FIG. Although the present invention focuses on a storage box which is excellent in performance and is desirable, it is clear that the effect of the invention is manifested based on the shape and design of the teeth of the saw blade. Therefore, for example, the material of the box may be a thin plate of plastic, wood, metal, or the like, and the column shape of the box cross section may be circular, elliptical, or polygonal such as triangular or more. . Furthermore, the overall shape of the saw blade and the attachment position of the saw blade are also shown in FIG.
It is possible to apply not only to the above example but also to all conventionally known ones.

【００３７】本発明で言う金属製鋸刃は、例えば鉄、
銅、真鍮、アルミニウム、ステンレス等の、厚み０．２
５〜０．１５ｍｍ程度の薄板を切断加工して作られる。
この場合、防錆、加工精度の維持、切断具と堅牢性、経
済性などから厳選したときの鋸刃の材質は、ＪＩＳーＧ
３３０３に定めるブリキを用いる場合が最も理想的であ
る。鋸刃の長手全体形状（刃先を結ぶ仮想線の形状）
は、直状のもの、凹形弧状のもの、凸形弧状のもの、Ｖ
形突形状のもの、台形突形状のもの等でもかまわない。
又、本発明の金属製鋸刃は、金型で鋸刃状に切断された
ままの状態で使用でき、あえて歯山の目立てや歯山を錐
状に鋭利にする必要ない。The metal saw blade referred to in the present invention is, for example, iron,
Thickness 0.2 of copper, brass, aluminum, stainless steel, etc.
It is made by cutting a thin plate of about 5 to 0.15 mm.
In this case, the material of the saw blade when carefully selected from rust prevention, maintenance of processing accuracy, cutting tool and robustness, economy, etc. is JIS-G
It is most ideal to use the tin plate defined in 3303. Overall length of saw blade (shape of virtual line connecting blade edges)
Is straight, concave arc, convex arc, V
It may be a projecting shape or a trapezoidal shape.
Further, the metal saw blade of the present invention can be used in a state where the metal saw blade is cut in a saw-tooth shape with a mold, and it is not necessary to dare to sharpen the tooth crest or to sharpen the tooth crest into a conical shape.

【００３８】本発明で言う薄膜状体は、金属製鋸刃の材
料となる金属薄板と一緒に金型で鋸刃状に容易に切断が
でき、その鋸刃状切口でラップフィルム切断の妨げにな
らない状態に切れ揃い、引き剥がしの力に耐える強靭さ
があるものであれば特に制限はない。具体的には例え
ば、一般の加工紙、バルカナイズド硬化紙、プラスチッ
クフィルム・シート、繊維の編・織物、繊維の不織布等
である。中でも縦横の配向に方向性を持たないプラスチ
ックフィルム・シートは、強靭で且つ取り扱いが容易で
あるので望ましい。厚みは、薄膜状体に採用する材質特
性と対象にする鋸刃のカシメ爪のの長さに応じて選択す
ることになるが、一般的には約０．０５〜１．５ｍｍの
範囲、望ましくは約０．１〜０．８ｍｍの範囲から選ば
れる。The thin film-like material referred to in the present invention can be easily cut into a saw-tooth shape with a metal mold together with a metal thin plate which is a material for a metal saw blade, and the saw-tooth-shaped cuts prevent the wrap film from being cut. There is no particular limitation as long as it has a toughness that can withstand the force of peeling and can be cut into a state in which it does not become rough. Specifically, for example, general processed paper, vulcanized hardened paper, plastic film / sheet, fiber knitting / woven fabric, fiber nonwoven fabric, and the like. Above all, a plastic film or sheet having no orientation in the vertical and horizontal orientations is preferable because it is tough and easy to handle. The thickness will be selected according to the material characteristics adopted for the thin film body and the length of the crimping nail of the saw blade to be targeted, but in general, it is in the range of about 0.05 to 1.5 mm, preferably Is selected from the range of about 0.1 to 0.8 mm.

【００３９】また本発明で言う仮留め部Ｑは、その材質
および配置場所ともに従来公知のものであり、切断具の
ある手前の部位の適所に、例えば粘着性の接着剤や表面
が平滑な樹脂層を配したもの等である。中でも紫外線架
橋性硬化ニスを表面が平滑な樹脂層として用いたもの
は、全体としてのフイルム係止能が高いので、本発明の
効果の活用には有利となる。The temporary fastening portion Q referred to in the present invention is conventionally known both in terms of its material and location. For example, a tacky adhesive or a resin having a smooth surface may be placed in a proper position in front of the cutting tool. For example, the layers are arranged. Among them, the one using the UV-crosslinkable cured varnish as the resin layer having a smooth surface has a high film locking ability as a whole, and thus is advantageous for utilizing the effects of the present invention.

【００４０】本発明で言う引裂強度は、ＪＩＳ Ｐ８１
１６に準拠して測定した値の、縦、横の平均値である。
尚、測定機には軽荷重引裂強度測定機（（株）東洋精機
製作所製）を用い、サンプルサイズは、幅５０ｍｍ長さ
６３．５ｍｍに一枚づつ切り取り、縦、横各５枚ずつの
サンプル数とした。測定は、サンプルの幅方向のほぼ中
央に１２．７ｍｍの切れ目を入れて行なった。即ち、本
発明が対象とする引裂強度は低い値のものであり、通常
用いるエレメンドルフ測定機では誤差が大きい。ところ
が軽荷重の測定方法を基準化したものが他にないので止
むを得ず紙の基準であるＪＩＳ Ｐ８１１６を準拠した
訳である。The tear strength referred to in the present invention is JIS P81.
16 is an average value in the vertical and horizontal directions of the values measured according to 16.
A light load tear strength measuring machine (manufactured by Toyo Seiki Seisakusho Co., Ltd.) was used as the measuring machine, and the sample size was cut into pieces of 50 mm in width and 63.5 mm in length, 5 pieces each in length and width. The number. The measurement was performed by making a cut of 12.7 mm at approximately the center in the width direction of the sample. That is, the tear strength targeted by the present invention has a low value, and the error is large in the normally used Elemenddorf measuring machine. However, since there is no other standardized light load measuring method, it is unavoidable that it complies with JIS P8116, which is the standard for paper.

【００４１】本発明に用いた評価方法および評価尺度は
次の通りである。 （１）鋸刃の形状寸法および角度の測定 歯山の高さ、ピッチ、平坦状谷底部、歯山の先端の円弧
の半径等の寸法、および歯山の傾斜角の測定は、鋸刃の
長手方向にほぼ均等に１０分割し、その１分割部分当た
り１０個の歯（合計１００個の歯）について、光学顕微
鏡（倍率約１００倍）で拡大して測定したものである。
尚、寸法関係の測定値は、小数点以下３桁まで測定した
値を平均し、小数点以下３桁定のところで五捨六入して
小数点以下２桁に丸めた。また角度は、小数点以下１桁
まで測定した値を平均し、小数点以下１桁定のところで
五捨六入して小数点以上に丸めた。 （２）亀裂（Ｔ）の発生率 この測定は、事前に行なった調査で、１０回の切断につ
いて観測した値の平均値で示す結果と、１回の切断につ
いて観測した値との間で、多くても約２％の値のずれし
かなく、１回の切断について観測した値を用いてもその
鋸刃が示す亀裂（Ｔ）の発生率の水準は示せるとする知
見を得たので、１回の切断について観測した値を用い
た。即ち、切断したフイルム端の全幅にある歯山の跡の
について光学顕微鏡（倍率約１７倍）で観測し、谷の数
の全部と亀裂のある谷の数とを数え、次の式で計算して
求めた。The evaluation method and evaluation scale used in the present invention are as follows. (1) Measurement of shape and angle of saw blade The height, pitch, flat valley bottom, radius of the arc of the tip of the tooth, and the angle of inclination of the tooth are measured with the saw blade. The measurement was made by dividing the tooth into 10 substantially evenly in the longitudinal direction, and enlarging and measuring 10 teeth (100 teeth in total) per divided portion with an optical microscope (magnification about 100 times).
As for the measurement values related to the dimensions, the values measured up to 3 digits after the decimal point were averaged, rounded off to the nearest 3 digits after the decimal point, and rounded to 2 digits after the decimal point. For the angle, the values measured up to one digit after the decimal point were averaged, and the values were rounded off to the first decimal place and rounded off. (2) Occurrence rate of cracks (T) This measurement was carried out in advance by a survey conducted between the result shown by the average value of the values observed for 10 cuttings and the value observed for 1 cutting, It was found that there was only a deviation of about 2% at most, and even if the value observed for one cutting was used, the level of incidence of cracks (T) indicated by the saw blade could be shown. The value observed for the cutting was used. That is, the traces of tooth crests on the entire width of the cut film edge are observed with an optical microscope (magnification about 17 times), the total number of valleys and the number of cracked valleys are counted, and calculated by the following formula. I asked.

【００４２】亀裂の発生率（％）＝（亀裂のある谷の数
÷谷の数の全部）×１００ （３）切断性能 （３）−１ 切断性（切れ味） 熟練した（感性の高い）モニター１人を厳選し、常に従
来（市販）品との対比で判断させるモニターによる官能
テストを実施した。即ち、収納箱から約１５ｃｍ長のフ
イルムを引き出し、これを切断する操作を従来（市販）
品と比較しながら繰り返し、切れ味の感触、切断端の揃
い方で評価する。切断方法は『持ち上げ切り』と『水平
開き切り』の２種類を採用し、夫々評価した。尚、ここ
で約１５ｃｍ長の引き出し−切断を採用している理由
は、比較的困難な切断で鋸刃の性能の良否が顕著に現わ
れることによる。Occurrence rate of cracks (%) = (number of valleys with cracks / total number of valleys) × 100 (3) Cutting performance (3) -1 Cutting performance (sharpness) Skilled (highly sensitive) monitor A sensory test was conducted by carefully selecting one person and always making a judgment in comparison with a conventional (commercially available) product. That is, the conventional operation (commercially available) is to pull out a film about 15 cm long from the storage box and cut it.
Repeatedly comparing with the product, and evaluate the sharpness and the alignment of the cut edges. Two types of cutting methods, "lifting cut" and "horizontal opening cut" were adopted and evaluated respectively. The reason why the pull-cut of about 15 cm length is adopted here is that the quality of the saw blade's performance remarkably appears due to relatively difficult cutting.

【００４３】[0043]

【表２】 [Table 2]

【００４４】（３）−２ 切断性能の持続性 上記の「約１５ｃｍ長のフイルムを引き出しこれを切断
する操作」を、巻層フイルム（２０ｍ巻）の３本分（２
本目からは補充）につき実施し、試験前後での収納箱
（掩蓋片）の変形量の大きさで評価した。この切断は、
収納箱に掛かる負担が相対的に大きく、従って切れ味が
低下したものは、この変形量が大きくなることになる。
変形量は、前板と掩蓋片との間の長手中央での隙間寸法
の増加量（反り変形量）を求めた。(3) -2 Persistence of cutting performance The above-mentioned "operation of pulling out a film having a length of about 15 cm and cutting it" is applied to three rolls (20 m rolls) (2
Replenishing from the first), and evaluated by the amount of deformation of the storage box (cover piece) before and after the test. This disconnection
When the load on the storage box is relatively large and the sharpness is reduced, the amount of deformation is large.
As the amount of deformation, the amount of increase in the size of the gap (warp deformation amount) at the longitudinal center between the front plate and the covering lid piece was determined.

【００４５】また評価には、『水平開き切り』を採用し
た。理由はこの切断法が最も掩蓋片の反り変形を生じ易
いことによる。For evaluation, "horizontal open cut" was adopted. The reason is that this cutting method is most likely to cause warp deformation of the lid piece.

【００４６】[0046]

【表３】 [Table 3]

【００４７】（３）−３ 切断音 熟練した（感性の高い）モニター１人を厳選し、常に従
来（市販）品との対比で判断させるモニターによる官能
テストを実施した。即ち、収納箱から約１５ｃｍ長のフ
イルムを引き出し、これを切断する操作を従来（市販）
品と比較しながら繰り返し切断音を評価する。切断方法
は『持ち上げ切り』を採用した。理由はこの切断法が最
も普及していることによる。(3) -3 Cutting sound One skilled (highly sensitive) monitor was carefully selected, and a sensory test was carried out by a monitor that always judges in comparison with a conventional (commercial) product. That is, the conventional operation (commercially available) is to pull out a film about 15 cm long from the storage box and cut it.
The repeated cutting noise is evaluated while comparing with the product. The cutting method is "lifting cut". The reason is that this cutting method is most popular.

【００４８】[0048]

【表４】 [Table 4]

【００４９】（４）鋸刃の引き剥がし性 収納箱の薄膜状体のはみ出し部Ｐを摘んで鋸刃の引き剥
がしを行なった。(4) Peelability of saw blade The saw blade was peeled off by picking up the protruding portion P of the thin film-like body of the storage box.

【００５０】[0050]

【表５】 [Table 5]

【００５１】[0051]

【実施例】紙管に巻層された幅寸法約３００ｍｍの塩化
ビニリデン系樹脂フィルム［商品名：サランラップ（旭
化成社製）、引裂強度３〜４ｇ、巻き量２０ｍ］を収納
した箱体を作成するに当たり、市販に供している収納箱
を用意した。この箱体の基本構造は、図５に示す通りの
ものである。即ち、前板１、底板２、後板３、及び脇板
８とで形成された上部が開口した長方形の収納室１３
と、その収納室１３の後板３の側縁から収納室開口部を
覆う方向に連接した蓋板４と、その蓋板４の側縁から前
板１を覆う方向に延した掩蓋片５と、掩蓋片５で覆われ
る前板１の表面に切断後のフイルムを係止する仮留め部
Ｑを有した長方形の箱体で、収納室１３に収納した巻回
フイルムＲからラップフイルムＦの必要量を引き出し、
掩蓋片５の先端に配備した全体としての形状が直状であ
る金属（ブリキ）製の鋸刃Ｋで切断して用いるラップフ
イルムの収納箱である。この箱の前板１の部分仕様は、
全体寸法は高さ４４ｍｍ、長さ３１０ｍｍであり、蓋を
した時はその高さの上から約３０ｍｍの部分は掩蓋片５
（先端に付いた切断具を含む）で覆われる。その覆われ
る前板の上端縁から４ｍｍを残した前板上方から下方側
に幅１６ｍｍの仮留め部Ｑを長手全域に設けてある。こ
の仮留め部Ｑは、紫外線架橋性硬化ニス ［商品名：フ
ラッシュドライ、東洋インキ製造（株）社製］を塗布、
乾燥して作成したものであるこれに取り付ける上記長尺
の鋸刃Ｋはブリキ板［粗面仕上げ、調質度ＤＲ−８、厚
み０．１７ｍｍ（ＪＩＳ Ｇ３３０３）］を用いた。EXAMPLE A box body containing a vinylidene chloride resin film having a width dimension of about 300 mm wound around a paper tube [trade name: Saran Wrap (manufactured by Asahi Kasei Corp.), tear strength of 3 to 4 g, and winding amount of 20 m] is prepared. At that time, a storage box that is commercially available was prepared. The basic structure of this box is as shown in FIG. That is, a rectangular storage chamber 13 formed by the front plate 1, the bottom plate 2, the rear plate 3, and the side plate 8 and having an open upper portion
A lid plate 4 connected from the side edge of the rear plate 3 of the storage chamber 13 in the direction of covering the storage chamber opening, and a cover lid piece 5 extending from the side edge of the lid plate 4 in the direction of covering the front plate 1. , A rectangular box having a temporary fastening portion Q for locking the cut film on the surface of the front plate 1 covered with the cover piece 5, and the need for the wrapping film F from the winding film R stored in the storage chamber 13. Withdraw the amount,
It is a wrap film storage box used by cutting with a saw blade K made of metal (tin) having a straight shape as a whole arranged at the tip of the cover piece 5. Partial specifications of the front plate 1 of this box are
The overall dimensions are 44 mm in height and 310 mm in length, and when the lid is closed, the portion about 30 mm above the height is the cover piece 5.
Covered with a cutting tool attached to the tip. A temporary fastening portion Q having a width of 16 mm is provided over the entire length from the upper side to the lower side of the front plate leaving 4 mm from the upper edge of the front plate to be covered. This temporary fastening portion Q is coated with a UV-curable curable varnish [trade name: flash dry, manufactured by Toyo Ink Mfg. Co., Ltd.],
A tin plate [rough surface finish, tempering degree DR-8, thickness 0.17 mm (JIS G3303)] was used as the long saw blade K attached to the dried saw blade.

【００５２】［実験例１、比較例１、および参考例１］
実験例１、比較例１の目的は、鋸刃の歯山の形状を評価
するためのものである。従って薄膜状体は介在させず、
鋸刃については、歯山先端の円弧の半径を統一し、歯山
の高さ、歯山の傾斜角、平坦状谷底部の寸法、歯山間ピ
ッチを変更したものについて亀裂の発生率、切断性能を
評価したものである。。変更した長尺鋸刃の歯山の高
さ、歯山の傾斜角、平坦状谷底部の寸法は、表６の実験
Ｎｏ．１〜９、表７の実験Ｎｏ．１０〜２１に示した内
容の通りである。つまり、表６、７の値は、長尺鋸刃の
長手全長（約３０５ｍｍ）に同形の歯山が均等な分布で
配列することを目標に作成して得た鋸刃を、本文に記載
測定方法で評価した数値を示したものである。実験Ｎ
ｏ．１〜９は実験例１で、実験Ｎｏ．１０〜２１は比較
例１である。[Experimental Example 1, Comparative Example 1, and Reference Example 1]
The purpose of Experimental Example 1 and Comparative Example 1 is to evaluate the shape of tooth flanks of the saw blade. Therefore, without interposing a thin film,
For saw blades, the radius of the arc at the tip of the tooth crest was unified, and the height of the tooth crest, the inclination angle of the tooth crest, the dimension of the flat valley bottom, and the pitch between the tooth crests were changed. Is evaluated. . The height of the tooth crests, the inclination angle of the tooth crests, and the dimensions of the flat valley bottom of the changed long saw blade are shown in Experiment No. 6 of Table 6. Experiment Nos. 1 to 9 and Table 7 The contents are as shown in 10 to 21. In other words, the values shown in Tables 6 and 7 are the values measured in the text of the saw blade, which was created with the goal of arranging the tooth flakes of the same shape in a uniform distribution over the entire length of the long saw blade (about 305 mm). The numerical values evaluated by the method are shown. Experiment N
o. Experiment Nos. 1 to 9 are Experiment Nos. 1. 10 to 21 are Comparative Example 1.

【００５３】従来（現状）の技術水準との違い、即ち顧
客の要望を満たすように設計された長尺鋸刃の付いた市
販品の水準との違い（対比）を明らかにするために、３
種類の現行市販品を用意し、夫々の鋸刃を本文に記載測
定方法で評価し、得た数値を表７の参考例１に示した。
ひとつは［商品名：サランラップ（旭化成社製）入りの
収納箱］の市販品そのもの（実験Ｎｏ．２２）、もう一
つは［商品名：ポリラップ＝ポリエチレン系樹脂製のも
の（中国レジン社製）入りの収納箱］（実験Ｎｏ．２
３）であり、さらにもう一つはＧＬＡＤ ＷＲＡＰ［商
品名：ＧＬＡＤＰＲＯＤＵＣＴＳ社（オーストラリア
国）製、ポリエチレン系樹脂フイルム入り］収納箱（実
験Ｎｏ．２４）である。実験Ｎｏ．２２を実験に供した
理由は、従来鋸刃の代表的形状であることである。実験
Ｎｏ．２３をこの実験に供した理由は、採用されている
長尺鋸刃の材質が板紙製（バルカナイズド硬質変性の処
理をした板紙：長さ約３０５ｍｍ、厚み０．２８ｍｍ）
であることである。従って、他の実験品との諸条件を均
しくする為に、鋸刃を丁寧に取り外し、その鋸刃を他の
実験品と同じ収納箱の掩蓋片の裏面に、金属針（マック
ス針 Ｎｏ．１０−１Ｍ）により強固にカシメ固定をす
ることにし、巻層フイルムも巻幅寸法約３００ｍｍの塩
化ビニリデン系樹脂フイルム［商品名：サランラップ
（旭化成社製）、引裂強度３〜４ｇ、巻き量２０ｍ］に
詰め換えた。もう一つの収納箱（実験Ｎｏ．２４）は、
具備されている長尺の金属製鋸刃（長さ約３３８ｍｍ、
厚み０．２５ｍｍ）の形態が本発明のものに外見上が似
ているので、あえてここに採用することにした。従って
他の実験品との諸条件を均しくする為に、鋸刃のカシメ
爪を丁寧に起こして鋸刃を取り外し、３０５ｍｍに切断
し、その鋸刃を他の実験品と同じ収納箱の掩蓋片の裏面
にカシメ爪により強固にカシメ固定をすることにし、巻
層フイルムも巻幅寸法約３００ｍｍの塩化ビニリデン系
樹脂フイルム［商品名：サランラップ（旭化成社製）、
引裂強度３〜４ｇ、巻き量２０ｍ］に詰め換えた。鋸刃
の歯山の高さ、歯山の傾斜角、平坦状谷底部の寸法、歯
山間ピッチは、表７の実験Ｎｏ．２３〜２４に示した内
容の通りである。In order to clarify the difference (contrast) from the conventional (current) technical level, that is, the level (comparative) of the commercial product with a long saw blade designed to meet the customer's request,
Various types of current commercial products were prepared, each saw blade was evaluated by the measuring method described in the text, and the obtained numerical values are shown in Reference Example 1 of Table 7.
One is the commercial product itself of [Product name: Storage box containing Saran Wrap (manufactured by Asahi Kasei)] (Experiment No. 22), and the other is [Product name: Polywrap = Polyethylene resin (made by China Resin Co.). Storage box] (Experiment No. 2
3), and the other is a GLAD WRAP [trade name: manufactured by GLADPRODUCTS (Australia), containing polyethylene resin film] storage box (Experiment No. 24). Experiment No. The reason why 22 was subjected to the experiment is that it is a typical shape of a conventional saw blade. Experiment No. The reason why 23 was used in this experiment was that the material of the long saw blade used was made of paperboard (Valkanized hard modified paperboard: length about 305 mm, thickness 0.28 mm)
It is to be. Therefore, in order to equalize the conditions with the other experimental products, the saw blade was carefully removed, and the saw blade was attached to the back of the cover piece of the same storage box as the other experimental products with a metal needle (Max Needle No. 10-1M) to firmly fix by caulking, and the winding layer film also has a winding width dimension of about 300 mm, a vinylidene chloride resin film [trade name: Saran Wrap (manufactured by Asahi Kasei Corporation), tear strength 3 to 4 g, winding amount 20 m]. I refilled it. Another storage box (Experiment No. 24) is
Equipped with a long metal saw blade (length about 338 mm,
Since the form of (thickness 0.25 mm) is similar in appearance to that of the present invention, it was decided to adopt it here. Therefore, in order to equalize the conditions with other experimental products, carefully raise the caulking claws of the saw blade, remove the saw blade, cut it to 305 mm, and put the saw blade on the cover of the same storage box as other experimental products. The caulking nails are used to firmly fix the caulking to the back side of one piece, and the winding layer film is a vinylidene chloride resin film with a winding width of about 300 mm [Product name: Saran Wrap (Asahi Kasei Co., Ltd.),
The tear strength was 3 to 4 g, and the winding amount was 20 m]. The height of the tooth flank of the saw blade, the inclination angle of the tooth lobe, the dimension of the flat valley bottom, and the pitch between the tooth flanks are shown in Table 7. The contents are shown in 23 to 24.

【００５４】上記実験Ｎｏ．１〜２１および実験Ｎｏ．
２２〜２４の収納箱について、本文記載の方法で切断性
能、亀裂部の発生率を評価し、その結果を表８、９にま
とめて示した。また、実験Ｎｏ．１の鋸刃自体と、それ
で切断したフイルム端との拡大写生図（光学顕微鏡の１
７倍の写真を模写スケッチし、部分省略したもの）を、
夫々、図１と図２に示した。実験Ｎｏ．２２の鋸刃自体
と、それで切断したフイルム端との拡大写生図を、夫
々、図３と図４（Ａ）（Ｂ）に示した。尚、図４（Ａ）
は『水平開き切り』によるもの、図４（Ｂ）は『持ち上
げ切り』によるものである。The above experiment No. 1-21 and Experiment No.
With respect to the storage boxes 22 to 24, the cutting performance and the incidence of cracks were evaluated by the methods described in the text, and the results are summarized in Tables 8 and 9. Experiment No. Enlarged drawing of the saw blade itself and the edge of the film cut with it (1
(A sketch of a 7x photo, with some parts omitted)
They are shown in FIGS. 1 and 2, respectively. Experiment No. Enlarged drawings of the saw blade of No. 22 itself and the edge of the film cut by the saw blade are shown in FIGS. 3 and 4 (A) and (B), respectively. Note that FIG. 4 (A)
Is due to "horizontal opening cut", and FIG. 4 (B) is due to "lifting cut".

【００５５】表８、９の結果は、次のことをしめしてい
る。即ち、 （１）板紙製（実験Ｎｏ．２３）の鋸刃の切断性能は、
本発明が目的とする切断性能の水準には遠く及ばない。
これは材質に起因するもので、バルカナイズド硬質変性
の処理をした板紙でも金属板の特性には至らない。又亀
裂部の発生率も多い。これは歯山の形状の相違によるも
のである。The results in Tables 8 and 9 indicate the following. That is, (1) The cutting performance of the saw blade made of paperboard (Experiment No. 23) is
The level of cutting performance targeted by the present invention is far below.
This is due to the quality of the material, and even paperboard that has undergone vulcanized hard modification does not reach the characteristics of metal plates. The rate of occurrence of cracks is also high. This is due to the difference in the shape of the tooth crests.

【００５６】（２）参考例（実験Ｎｏ．２４）の金属製
鋸刃の切断性能は、本発明が目的とする切断性能の水準
には遠く及ばない。また『亀裂部の発生率』も高い。こ
れはこの鋸刃の設計が、引裂強度が（縦／横＝３７／１
４４ｇ）と大きく、且つ極めて伸び易いポリエチレン系
樹脂フイルムの切断専用に考えられた鋸刃であることに
よる。(2) The cutting performance of the metal saw blade of the reference example (Experiment No. 24) is far below the level of the cutting performance targeted by the present invention. Also, the "incidence rate of cracks" is high. This saw blade has a tear strength of (length / width = 37/1
This is because it is a saw blade specially designed for cutting polyethylene-based resin film that is as large as 44 g) and is extremely stretchable.

【００５７】（３）金属製鋸刃付きの収納箱での『亀裂
部の発生率』の対比で、［例えば（実験Ｎｏ．１）］
は、従来品（実験Ｎｏ．２２）の約１／１３に抑制改善
する。この相違を鋸刃の歯山でみると、歯山の高さが従
来（現行市販）品が１．０ｍｍに対し、発明品は０．５
０ｍｍの（約１／２）に低めたことと、０．５０ｍｍの
平坦状谷部を設けたことの効果である。この抑制効果の
発現には、歯山の高さを０．４０〜０．６０ｍｍの範囲
のものにし、平坦状谷底部を０．３０〜０．７０ｍｍす
る必要がある。この驚くべき効果の発現は従来技術の情
報からは予測ができないものである。 ［実施例１、比較例２］実施例１、比較例２の目的は、
鋸刃の引き剥がしの容易性を確保するのに必要な薄膜状
体の介在させる長さを示すことである。鋸刃は註１に示
す鋸刃に統一し、薄膜状体の介在形態だけを変更したも
のについて本文記載の方法で鋸刃の引き剥がし性をサン
プル数５００個で評価した。変更した薄膜状体の介在さ
せる長さ及びその結果を表１０に示す。実験Ｎｏ．２５
〜２７は実施例１で、実験Ｎｏ．２８〜２９は比較例２
である。表１０の結果は、次のことを示している。即
ち、 （４）鋸刃の引き剥がしの容易性を確保するのに必要最
小限の薄膜状体の介在させる長さは、鋸刃の全長の３％
であることが判る。(3) In comparison with the "occurrence rate of cracks" in a storage box with a metal saw blade, [for example (Experiment No. 1)]
Suppresses and improves to about 1/13 of the conventional product (Experiment No. 22). Looking at this difference in the tooth flank of the saw blade, the tooth flank height is 1.0 mm for the conventional (currently commercially available) product and 0.5 for the invention product.
This is an effect of reducing the height to 0 mm (about 1/2) and providing a flat valley portion of 0.50 mm. In order to exhibit this suppressing effect, it is necessary to set the height of the tooth crests in the range of 0.40 to 0.60 mm and the flat valley bottom to 0.30 to 0.70 mm. The onset of this surprising effect is unpredictable from the information of the prior art. [Example 1 and Comparative Example 2] The purpose of Example 1 and Comparative Example 2 is to
This is to show the length of the thin film-like material that is necessary to ensure the ease of peeling off the saw blade. The saw blade shown in Note 1 was standardized, and only the intervening form of the thin film was changed, and the peelability of the saw blade was evaluated by 500 samples by the method described in the text. Table 10 shows the intervening length of the modified thin film-like material and the result thereof. Experiment No. 25
No. 27 to No. 27 are in Example 1, and Experiment No. 28 to 29 are Comparative Example 2
Is. The results in Table 10 show the following. That is, (4) The minimum length of the thin film-like material to ensure the ease of peeling off the saw blade is 3% of the total length of the saw blade.
It turns out that

【００５８】［実施例２、比較例３］実施例２、比較例
３の目的は、上記に加え薄膜状体を介在させることを条
件として、採用する鋸刃の切断音と亀裂の抑制との調和
をとる歯山先端の円弧の半径を示すことである。従って
実験Ｎｏ．３１〜３８は、歯山の高さ、歯山の傾斜角、
平坦状谷底部の寸法、歯山間ピッチを実験Ｎｏ．１と同
じにし、歯山先端の円弧の半径、薄膜状体の介在させる
長さを変更したものであり、実験Ｎｏ．３０は本発明内
の異なる寸法の鋸刃の実用性を実証するものである。実
験Ｎｏ．３０〜３８について本文記載の方法で切断性
能、亀裂の発生率を評価した。変更した寸法等及びその
結果を表１１に示す。。実験Ｎｏ．３０〜３４は実施例
２で、実験Ｎｏ．３５〜３８は比較例３である。表１１
の結果は、次のことを示している。即ち、 （５）薄膜状体の介在させる長さの上限は鋸刃の全長の
８％であることが判る。切断音と亀裂の抑制を調和させ
ることができる歯山先端の円弧の半径は、両端部に位置
する歯山は０．０２ｍｍ以上０．０５ｍｍ以下、中央部
に位置する歯山は０．０５ｍｍを超え０．０８ｍｍ以下
の範囲のものであることが判る。[Example 2 and Comparative Example 3] The purpose of Example 2 and Comparative Example 3 is to suppress cutting noise and cracks of a saw blade to be employed, provided that a thin film-like material is interposed in addition to the above. It is to show the radius of the arc of the tip of the tooth for harmony. Therefore, Experiment No. 31 to 38 are the height of the tooth peak, the inclination angle of the tooth peak,
The size of the flat valley bottom and the pitch between the crests of the teeth were determined by experiment No. In the same manner as in No. 1, the radius of the circular arc at the tip of the tooth crest and the length in which the thin film is interposed are changed. 30 demonstrates the utility of different sized saw blades within the present invention. Experiment No. For 30 to 38, the cutting performance and crack occurrence rate were evaluated by the methods described in the text. Table 11 shows the changed dimensions and the results. . Experiment No. 30 to 34 are the second embodiment, and the experiment No. 35 to 38 are Comparative Example 3. Table 11
The results show that: That is, (5) it is understood that the upper limit of the length in which the thin film-like material is interposed is 8% of the total length of the saw blade. The radius of the circular arc at the tip of the tooth crest that can harmonize cutting noise and crack suppression is 0.02 mm or more and 0.05 mm or less for the tooth crests located at both ends, and 0.05 mm for the tooth crest located at the center. It can be seen that the range is over 0.08 mm or less.

【００５９】[0059]

【表６】 [Table 6]

【００６０】[0060]

【表７】 [Table 7]

【００６１】[0061]

【表８】 [Table 8]

【００６２】[0062]

【表９】 [Table 9]

【００６３】[0063]

【表１０】 [Table 10]

【００６４】[0064]

【表１１】 [Table 11]

【００６５】[0065]

【発明の効果】表６から表１１の結果で明らかなよう
に、上述の構成を持つ本発明の収納箱は、鋸刃の引き剥
がしが安全且つ容易に実施でき、従来（現行市販）品の
持つ切断性能（切断性、切断性能の持続性、切断音）は
保持した状態で、切断したフイルム端に生じる亀裂部の
発生率を大幅に抑制する効果がある。この亀裂部は、フ
イルム端を引き出す時にフイルムが『意図しない方向に
裂ける』不良現象の元凶であるので、亀裂部の発生率を
大幅に抑制する収納箱は、産業界に有益な優れた発明で
ある。As is clear from the results of Tables 6 to 11, in the storage box of the present invention having the above-mentioned structure, the saw blade can be safely and easily peeled off, and the storage box of the conventional (currently commercially available) product can be removed. While maintaining the cutting performance (cuttability, sustainability of cutting performance, and cutting sound) that it has, it has the effect of significantly suppressing the incidence of cracks occurring at the ends of the cut film. This crack is the cause of the phenomenon that the film "rips in an unintended direction" when the film edge is pulled out, so a storage box that greatly suppresses the rate of cracks is an excellent invention that is beneficial to industry. is there.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例の図で、本発明での金属製鋸刃
の拡大（部分省略）写生図FIG. 1 is a diagram of an embodiment of the present invention, which is an enlarged (partially omitted) drawing of a metal saw blade according to the present invention.

【図２】本発明の実施例の図で、図１の鋸刃で切断した
フイルム端の拡大（部分省略）写生図FIG. 2 is an enlarged (partially omitted) sketch drawing of a film edge cut by the saw blade of FIG. 1 according to an embodiment of the present invention.

【図３】従来（現行市販）品の収納箱の鋸刃の拡大（部
分省略）写生図FIG. 3 An enlarged (partially omitted) drawing of the saw blade of a conventional (currently commercially available) storage box

【図４】図３の鋸刃で切断したフイルム端の拡大（部分
省略） 写生図4 is an enlarged (partially omitted) drawing of a film edge cut by the saw blade of FIG.

【図５】従来の収納箱の構造を示す模式図FIG. 5 is a schematic diagram showing the structure of a conventional storage box.

【符号の説明】[Explanation of symbols]

１ 前板 ２ 底板 ３ 後板 ４ 蓋板 ５ 掩蓋片 ６ 開封片 ７ 補助脇板 ８ 脇板 ９ 局部接合部 １０ 切取り線 １１ 脇掩蓋片 １２ カシメ具 １３ 収納室 Ｐ 薄膜状体のはみ出し部 Ｑ 仮留め部（フイルム係止部） Ｋ 切断具（長尺の金属製鋸刃） Ｒ 巻回フイルム Ｆ フイルム 1 Front plate 2 Bottom plate 3 Rear plate 4 Lid plate 5 Cover lid piece 6 Opening piece 7 Auxiliary side plate 8 Side plate 9 Local joint 10 Cut line 11 Side caulking lid piece 12 Caulking tool 13 Storage room P Thin film Q protruding part Fastening part (Film locking part) K Cutting tool (long metal saw blade) R Winding film F Film

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 柱状形の箱と箱の収納室に収納した巻回
フイルムと該箱に配備した長尺の金属製鋸刃からなり、
前記金属製鋸刃が、該鋸刃と同じ幅の薄膜状体を、薄膜
状体の端が該鋸刃端からはみ出す状態で該鋸刃面と箱体
面との間に介在させてカシメ爪で箱に固定されているラ
ップフィルム収納箱において、上記金属製鋸刃は、下記
ａ〜ｅの条件を満したものであり、且つ該鋸刃面と箱体
面との間に介在している上記薄膜状体は、該鋸刃の脇端
から鋸刃の長さの３％以上８％以下の範囲の長さ部分の
みに配したものであることを特徴とするラップフイルム
収納箱。 ［金属製鋸刃の条件］ ａ．歯山の高さ：０．６０ｍｍ以下０．４０ｍｍ以上の
範囲 ｂ．歯山の傾斜角：５５度以上６５度以下の範囲 ｃ．歯山間のピッチ：１．４６ｍｍ以下０．７２ｍｍ以
上の範囲 ｄ．相隣れる歯山間の谷部の形状：０．３０ｍｍ以上
０．７０ｍｍ以下の範囲の長さの平坦状を形成 ｅ．歯山の先端形状：鋸刃の長手方向両端部に位置する
歯山と長手方向中央部に位置する歯山とは異なる円弧状
に形成されており、その円弧状は歯山の傾斜角を二等分
する仮想線上を中心に歯山の両稜線に接して描ける円の
円弧で示すとき、長手方向の両端部に位置する歯山は
０．０２ｍｍ以上０．０５ｍｍ以下の半径の円の円弧、
長手方向の中央部に位置する歯山は０．０５ｍｍを超え
０．０８ｍｍ以下の半径の円の円弧である。1. A column-shaped box, a winding film stored in a box storage chamber, and a long metal saw blade arranged in the box,
The metal saw blade interposes a thin film body having the same width as that of the saw blade between the saw blade surface and the box surface with the end of the thin film body protruding from the saw blade end, and the caulking claw is provided. In the wrapping film storage box fixed to the box, the metal saw blade satisfies the following conditions a to e, and is interposed between the saw blade surface and the box body surface. A wrapping film storage box, wherein the thin film-like material is arranged only from a side edge of the saw blade to a length portion within a range of 3% to 8% of a length of the saw blade. [Conditions for metal saw blade] a. Height of tooth crest: range of 0.60 mm or less and 0.40 mm or more b. Inclination angle of tooth crest: range of 55 degrees or more and 65 degrees or less c. Pitch between teeth: range of 1.46 mm or less and 0.72 mm or more d. Shape of valley portion between adjacent tooth peaks: forming a flat shape having a length in the range of 0.30 mm or more and 0.70 mm or less e. Tip shape of tooth crest: The tooth crest located at both longitudinal end portions of the saw blade and the tooth crest located at the central portion in the longitudinal direction are formed in different arc shapes, and the arc shape defines the inclination angle of the tooth crests. When it is shown by a circular arc of a circle that can be drawn in contact with both ridgelines of the tooth peak centering on an imaginary line that divides equally, the tooth peaks located at both ends in the longitudinal direction are circular arcs with a radius of 0.02 mm to 0.05 mm,
The tooth crest located at the central portion in the longitudinal direction is an arc of a circle having a radius of more than 0.05 mm and 0.08 mm or less. 【請求項２】 上記鋸刃面と箱体面との間に介在してい
る薄膜状体の脇端からの長さの位置と、上記半径が０．
０２ｍｍ以上０．０５ｍｍ以下の円弧で示される歯山の
位置とは同じ位置である請求項１記載のラップフィルム
収納箱。2. The position of the length from the side edge of the thin film body interposed between the saw blade surface and the box body surface and the radius of 0.
The wrapping film storage box according to claim 1, wherein the position is the same as the position of the tooth crest indicated by an arc of 02 mm or more and 0.05 mm or less. 【請求項３】 上記ラップフィルムは、ＪＩＳ−Ｐ８１
１６に準拠した引裂き強度が２ｇ以上６ｇ以下のもので
ある請求項１記載のラップフィルム収納箱。3. The wrap film is JIS-P81.
The wrapping film storage box according to claim 1, which has a tear strength according to 16 of 2 g or more and 6 g or less.