201127712 六、發明說明： 【發明所屬之技術領域】 本發明係關於包裝膜或㈣等包裝物之切斷中所使用之 切斷刀，尤其係關於為將自收納有包裝物之卷狀體之紙盒 抽出的包裝物切斷而使用之安裝於紙盒之切斷刀、具備該 切斷刃之紙盒及包裝物供給體。 【先前技術】 如專利文獻1中所#載，包括收納包裝膜等包裝物之卷 狀體之紙盒、及安裝於紙盒之切斷刀的包裝物供給體為人 所周知°包裝物供㈣之紙盒通常包括：有底箱狀之紙盒 本體其於上表面具有開口；及蓋體，其可旋動地連結於 紙盒本體之後壁來對紙盒本體之開σ進行開閉。蓋體之前 壁上安裝有與紙盒本體内之卷狀體之中心軸平行的方向上 之沿著該前壁之大致全體而延伸之鋸齒狀的切斷刀，該切 斷刃係用於將自紙盒本體通過開σ抽出之包裝物切斷。 作為適用於該包裝物供給體之切斷刀而提出有如下之切 斷刀，即為提尚切斷刃對包裝物之切斷性，代替沿著與包 裝物之卷狀體之中^軸平行的方向延伸之直線形狀的切斷 刃，而使用在與該中心軸平行之方向上之切斷刀的中央部 具有頂點之V字狀的切斷刀。具備V字狀的切斷刀之包裝 物供給體通常按以下順序對包裝物進行切斷。_，首先： 面用隻手旱住紙盒本體一面用另一隻手自紙盒本體抽出 包裝物。然I，用拿住紙盒本體之手之大拇指將安裝有切 斷刃之蓋體之前壁中央部按壓於紙盒本體。由此，使之前 I5I405.doc 201127712 抽出之包裝物夾持於蓋體之前壁與紙盒本體之前壁之間。 其後，藉由使拿住紙盒本體之手之手腕弯曲’而使蓋體之 切斷刃之齒尖刺入所抽出之包裝物而將包裝物切斷。如此 使之剛抽出之包袭物自紙盒内之包裝物之卷狀體分離。此 時，由於係自具有v字狀的頂點之切斷刃之中央部開始用 切斷刃切斷包裝物’因而可確實且容易地將包裝物切斷。 [先前技術文獻] [專利文獻1]曰本專利特開平09-202324號公報 【發明内容】 [發明所欲解決之問題] 就包裝物之切斷中所使用之切斷刃而言，對包裝物同時 刺入之齒之個數越少，則利用切斷刃切斷包裝物之尤並門 始切斷時所需的力會變得越小。由此，為減小開始切斷: 所需之力，V字狀的切斷刃通常構成為如了 ：位於與包裝 物之卷狀體之中心轴平行之方向上的切斷刀之中央部之中' 心齒的齒尖比其他齒之齒尖突出，即設置於切斷刀之” 狀頂點之齒之齒尖最為突出。 热而，於中心齒之齒尘屮1 茴大比其他齒之齒尖突出之情形時， 中心齒之齒尖接觸於正自紙盒抽出之包裝物， 時會於包裝物上沿著包裝物相對於中心齒而移動之方向 亦即沿著與包裝物之卷狀體之中心向， 所期望之裂紋，即所謂之縱裂。 …而產生非 由此’本發明之目的在於提供一種 縱裂之包裝物用i77 ^ „ P制包裝物中產生 用切斷刀、具備該切斷刃之紙盒及包裝物供 151405.doc 201127712 [解決問題之技術手段] 為實現上述目的，本發明之第丨型態提供—種用於沿著 包裝物之卷狀體之中心軸將包裝物切斷之切斷刀。切二刃 包括具有排列成v字狀的複數個齒之中央部。上述v字在 切斷刃之與上述巾4平行的方向±的巾央處具有頂點， 上述複數個齒包括：中心齒，其設置於切斷刀之與上述中 心軸平行的方向上的中央處；複數個大齒，其自上述中心 齒向上述複數個齒之排列之兩末端隔開間隔而設置；及複 數個連結齒’其分別設置於彼此相鄰之上述大齒之間。連 結位於上述複數個齒之排列之兩末端中之—末端與上述中 心齒之間的連結齒之齒尖之線亦即連結齒之齒尖線，比連 結位於上述複數個齒之排列之同一末端與上述中心齒之間 的大齒之齒尖之線亦即大齒之齒尖線，更靠近該等連結齒 及大齒之齒底4述中心齒之齒尖位於上述連結齒之齒尖 線與上述大齒之齒尖線之間。 較佳為，上述中心齒之齒尖位於中央大齒之齒尖線上 該中央大齒之齒线係連結位於上述中心齒兩側且分別七 於最靠近上述中心齒之位置之2個大齒的齒尖之線。 本發明之第2型態提供—種紙盒，其包括··紙盒本體， 其收納包裝物之卷狀體，且具有用以抽出包裝物之開口; 及蓋體’其連結於上述紙盒本體，且安裝有可用以將自上 述紙盒本體之開口㈣之包裝物切斷之上述第1型態之切 斷刀。 I51405.doc 201127712 本發明之第3型雄楹徂 A〜、徒供一種包裝物供給體其包括：包 裝物之卷狀體’·收納上述卷狀體之紙盒；及可用以將上述 包裝物切斷之安裝於上述紙盒之上述第！型態之切斷刃。 [發明之效果] 根據本么明’當切斷刀接觸於正自卷狀體抽出之包裝物 位於中。齒之兩側且分別位於最靠近中心齒之位置之 2個大齒之齒尖將先於中心齒之齒尖或者同時地接觸於包 物由此即便因切斷刃接觸於正抽出之包裝物而導致 於兩者之間產生動摩擦’包裝物由此而受到之力亦會在2 個大齒之齒尖所接觸之2個部位，或者在中心齒之齒尖所 接觸之部位亦包含於其中之3個部位分散開。因此，與僅 有中心齒之齒尖接觸於包裝物之情形相比，作用於包裝物 之局部性之力得以降低，由此可抑制包裝物產生縱裂。 【實施方式】 以下’參照圖1〜圖4對本發明之一實施形態進行說明。 如圖1所示’本實施形態之包裝物供給體丨〇包括於上部 具有開口之細長的有底箱狀的紙盒本體丨3。紙盒本體丨3之 開口可由蓋體14開閉。蓋體14連結於紙盒本體13之背面壁 (後側壁）之上緣13a。紙盒本體13係藉由將例如1張厚紙、 較佳為1張塗佈紙板紙折彎而形成。於紙盒本體i 3之内 側’換言之於包含紙盒本體13及蓋體14之紙盒之内側，收 納作為包裝物之包裝膜12。包裝膜12係藉由捲繞於紙管u 而形成為卷狀。因此’包裝膜之卷狀體，即卷狀之包裝膜 12之中心軸與紙管11之中心軸ι1Α—致。圖1中以箭頭八表 151405.doc 201127712 示與卷狀之包裝膜12之中心軸平行的方向。以下，亦將與 卷狀之包裝膜丨2之中心軸平行之方向稱作中心軸方向Α。 包裝膜12由例如聚偏二氣乙烯形成。 蓋體14之正面壁（前側壁）之下緣14a包括中心軸方向八之 下緣！4a之中央部、及位於該中央部兩側之左右兩端部。 下緣之中央部形成在中心軸方向A之下緣之中央具 有頂點之V字狀。下緣i4a之各端部形成與中心軸方向a平 行之直線形狀。 於蓋體Μ之前側壁之背面安裝有切斷刃2〇。切斷刃2〇具 有沿著下緣14a排列之複數個齒。 於使用包裝物供給體10將包裝膜12切斷之情形時，首 先，用一隻手拿住紙盒本體13來打開蓋體M，並用另一隻 手拿住包裝膜12之前端部。自紙盒本體13抽出所期望長: 之包裝膜12之後，閉合蓋體14並—面用拿住紙盒本體此 手之大拇指按壓蓋體14之前側壁的中央附近，—面以與中 心軸方向A平行之旋轉軸為中心扭動紙盒本體13。由此， 切斷刃20之齒中位於中心轴方向a之中央處之齒的齒尖首 先刺入包裝膜12。其後’進一步扭動紙盒本體13，藉此使 包裝膜12自中心軸方向A之中央處向兩端部沿著中心軸方 向A切斷。 如圖2所示，蓋體14之前側壁之背面14b與切斷刀2〇之 間’設置有密封材15及接著層16。切斷㈣係藉由接著層 16而接著於密封材15。來ι_ 莕封材15係错由例如超音波接著法 而接著於蓋體14之背面14b。穿抖衧1<:山/ °在封材15由例如以乙烯-曱基 151405.doc 201127712 丙烯酸共聚物為主成分之材料形成。接著層丨6由例如聚胺 基甲酸酯系接著劑形成。由此，切斷刃2〇以不會容易地自 蓋體14脫落之足夠之強度經由密封材。及接著層“而安裝 於蓋體14。 如圖3所不，切斷刀2〇包括中央部21、及位於中央部21 左右之兩端部2 2。中央部2丨形成在中心軸方向A之切斷刀 20之中央處具有頂點之v字狀。各端部22形成沿著中心軸 方向A之直線形狀。切斷刃2〇之齒中設置於中央部2丨下緣 之齒，排列成於中心軸方向A之切斷刃2〇之中央處具有頂 點之v字狀。切斷刃20之齒中設置於各端部22下緣之齒， 沿著申心軸方向A排列成直線狀。切斷刃2〇之中央部2丨具 有通過中心軸方向A之切斷刃2〇之中央且以與中心軸方向 A正交而延伸之直線即中心線cL為中心成線對稱之形狀。 又，切斷刃20之兩端部22形成為以中心線為中心而相互 成線對稱。 切斷刃20之中央部21包括：第一中央部21A，其包含中 心軸方向A之切斷刃20之中央；及一對第二中央部21B， 其位於第一中央部21A之左右位置。設置於第一中央部 21A之齒之大多數具有比較大之尺寸，設置於第二中央部 21B之齒之大多數具有比較小之尺寸。 切斷刃20之中央部21所描繪之V字，即設置於中央部21 下緣之齒之排列所描繪之v字的内角θ設定為例如172 5。。中 心軸方向A之切斷刃20之尺寸即刃寬W20設定為例如304 mm。 中心軸方向A之第一中央部21A之尺寸即第一中央部tWa 151405.doc 201127712 mm 設定為例如39_13 mm。中心軸方向A之各第二中央部2ib 之尺寸即第二中央部寬爲設定為例如92 76随。中心轴方 向A之各端部22之尺寸即端部寬|6設定為例如π 切斷刀20由紙、硬化紙板、樹脂含浸紙、樹脂等非金屬材 料形成1為樹脂之示例，可列舉例如pET(pQiyethyiene terephthalate，聚對苯二甲酸乙二㈤或聚苯乙稀，但於需 要尤其考慮環境之情形時亦可使用生物降解性樹脂。作為 生物降解性樹脂之代表例，可列舉聚乳酸或聚乙醇酸。其 中，較佳為使聚乳酸系之樹脂組成物雙軸延伸而形成之= 斷刀’更具體而言’較佳為對使聚乳㈣之樹脂組成物雙 軸延伸而得之片材實施壓製加工或雷射切削而形成之切斷 刃。切斷刀20可於樹脂以外包含無機填充劑，亦可更包含 熱穩定劑、光穩定劑、防水材、脫模劑、顏料、染料。 接下來，參照圖4對設置於切斷刀2〇之第一中央部2〗a之 齒進行詳細說明。 如圖4所示，第一中央部21A包括位於中心軸方向a之第 中央部21A之中心位置的中心齒3 〇。中心齒3 〇之齒尖位 於中心線（^上。此外，第一中央部21A於中心齒3〇之左右 分別包括2個大齒3 1、作為連結齒4之中齒3 2、及i個小齒 33 〇 中心齒30、大齒31、中齒32及小齒33分別具有向齒之内 側凹陷之一對圓弧狀的斜邊。該些齒之各自之齒尖的2個 圓弧狀之斜邊的切線彼此所成之角度即齒尖角0a，設定為 適於齒尖刺入包裝膜12之角度。具體而言，於包裝膜12為 151405.doc •10· 201127712 聚偏二氯乙烯製之情形時，齒尖角ea較佳為30。〜9〇。’更 佳為4CT〜70。。#尖角如物。以上之齒具有較高之耐久 性。齒尖角如為90。以下之齒的齒尖刺入包裝膜12所需之 力較小即可。 十心軸方向A之中心齒30、各大齒31、各中齒32及各小 齒33之最大尺寸即中心齒寬w〇、大齒寬们、中齒寬Μ及 小齒寬Μ’滿足中心齒寬W0>大齒寬Wl>中齒寬w2>小齒 寬W3之關係。 切斷刃20之第一中央部21A之齒尖角如、中心齒寬胸、 大齒寬Wi、中齒㈣及小齒寬犯分別以例如以下方式設 定。齒尖角0a: 45。〜60。，令心齒tw〇: 3 56 _，大齒寬 ▽ 1:3.25麵’中齒寬^:2 49嶋，小齒寬们：132咖。 大齒31及中齒32之各自之—對斜邊中靠近中心㈣的斜 邊、即内側斜邊（若為設置於第丨中央部21A之右半部分之 大齒31及中齒32之情形則為左側之斜邊）之曲率半徑^小 於位於自中心齒30離開之位置之斜彡、即外側斜邊（若為 設置於第！中央部21A之右半部分之大齒31及中齒32之情形 則為右側之斜邊）之曲率半徑。因此，大齒3ι及中齒32之 各自之齒尖，相對於位於該齒尖左右之對應之一對齒底之 間之中間的位置’而靠近中心軸方向A之中心齒3〇，即偏 向内側。 進一步詳細而言，藉由通過各大齒31之齒尖且與中心軸 方向A正交而延伸之線，將大齒寬…丨分為内側大齒寬π。 及外側大齒寬Wle之兩部分。此時，滿足内側大齒寬wic< 15I405.doc 201127712 外側大齒寬Wle之關係。又，藉由通過各中齒32之齒尖且 與中心軸方向A正交而延伸之線’將中齒寬w2分為内側中 齒寬W2c及外側中齒寬W2e之兩部分。此時，滿足内側中 齒寬W2c<外側中齒寬W2e之關係。進而，藉由通過各小齒 33之齒尖且與中心軸方向A正交而延伸之線，將小齒寬W3 分為内側小齒寬W3c及外側小齒寬W3e之兩部分。此時， 滿足内側小齒寬W3c<外側小齒寬W3e之關係。 因此’大齒31、中齒32及小齒33之各自之齒尖，於利用 切斷刃20切斷包裝膜12時成為朝向所要切斷之包裝膜12之 中央的姿勢’因此可使各齒尖良好地刺入包裝膜12。 中心齒30之兩斜邊之曲率半徑R〇c例如均設定為2 3 8 mm。 各大齒31内側之斜邊之曲率半徑ric及外側之斜邊之曲率 半徑Rle分別a史足為例如3.19 mm及3.42 mm。各中齒32内 侧之斜邊之曲率半徑R2c及外側之斜邊之曲率半徑R2e分別 設定為例如2.08 mm及2.31 mm。各小齒33内側之斜邊之曲 率半徑R3c及外側之斜邊之曲率半徑R3e例如均設定為3 2 mm。 各大齒31之内側大齒寬wic及外側大齒寬Wle分別設定為 例如1.47 mm及1.78 mm »各中齒32之内側中齒寬W2c及外 側中齒寬W2e分別設定為例如113 mm及1.36 mm。各小齒 33之内側小齒寬W3c及外側小齒寬W3e分別設定為例如 0.61 mm及 0.71 mm。 就切斷刃20之第一中央部21A而言，於大齒31及小齒33 各自之左右側配置有對應之一對中齒3 2。進一步詳細而 言’分別設置於第一中央部21A之右半部分及左半部分之2 151405.doc •12· 201127712 個大齒3丨彼此之間的間隔之大小，與該2個大齒3i中靠近 中心齒30之大齒31與中心齒30之間的間隔之大小相等。而 且，分別設置於第一中央部21A之右半部分及左半部分之2 個大齒3 1彼此之間、及該2個大齒3丨中靠近中心齒3〇之大 齒31與中心齒30之間分別配置有對應之中齒32。而且，分 別設置於第—中央部21A之右半部分及纟半部分之4個中齒 32中其餘之2個中齒32、即自中心齒3〇離開最遠之位置之 中齒32與離開第2遠之位置之中齒32之間配置有小齒33。 大齒31、中齒32及小齒33各自之齒底，位於呈與切斷刃 2 0之中央部2 1所描繪之形狀相似的v字狀延伸之基準線l 〇 上。自基準線L0至大齒31之齒尖之距離即大齒高H1、自 基準線L0至中齒32之齒尖之距離即中齒高112、及自基準 線L0至小齒33之齒尖之距離即小齒高H3，係與齒尖角“相 同地設定為適於齒尖刺入包裝膜12之尺寸。其中，滿足大 齒高Hl>中齒高H2>小齒高H3之關係。換言之，連結分別 設置於第一中央部21A之右半部分及左半部分之2個大齒Μ 之齒尖的線即大齒的齒尖線L1與基準線L〇之間之距離，大 於連接設置於第一中央部21A之同一半部分之4個中齒32之 齒尖的線即連結齒的齒尖線L2與基準線“之間之距離。 又，分別設置於第一中央部21A之右半部分及左半部分之i 個小齒33之齒尖，比設置於第一中央部21A之同一半部分 之4個中齒32所相關之連結齒的齒尖線L2更靠近基準線 L0 〇 切斷刀20之第一中央部21A具有上述構成，藉此於利用 151405.doc •13· 201127712 第一中央部21A切斷包裝膜12時，於大齒31之齒尖刺入包 裝膜12之後，位於大齒31之間之中齒32之齒尖刺入包裝 膜’進而’位於中齒32之間之小齒33之齒尖隨後刺入包裝 膜12。即’設置於第一中央部21 a之齒既非同時刺入包裝 膜12 ’亦非以自位於中心軸方向a之第一中央部21A之中 央處的齒向位於第一中央部21A之兩端之齒的順序刺入包 裝膜12 ’而是於中心軸方向a上間斷性地反覆刺入包裝膜 12 ° 在此，若假設第一中央部21A之各齒之齒尖同時刺入包 裝膜12 ’則此時將會需要較大之力。於該方面而言，根據 本實施形態之切斷刀20 ’在利用切斷刃2〇開始切斷包裝膜 1 2時同時刺入包裝膜12之齒尖數較少，從而可相應地用較 小的力開始切斷包裝膜12。又，若假設第一中央部2丨八之 各齒之齒尖係以自位於中心軸方向A之第一中央部21A之 中央處的齒向位於第一中央部2丨八之兩端之齒的順序刺入 包裝膜12，則在利用第一中央部21A切斷包裝膜12時因作 用於包裝膜1 2之張力之影響，難以按照切斷刃2〇之形狀來 較佳地切斷包裝膜12〇於該方面而言，根據本實施形態之 切斷刃20 ,第一中央部21A之齒於中心軸方向A上間斷性 地刺入包裝膜12，藉此作用於包裝膜丨2之上述張力較小， 其結果可穩定地進行利用第—中央部2丨A切斷包裝膜丨2。 從而，可使切斷刃20之齒尖向包裝膜12之刺入及其後之包 裝膜12之切斷順利地自第一中央部21 a轉移至切斷刃之第 二中央部21B。 151405.doc 14 201127712 另一方面，第一中央部21八之中心齒3〇之齒尖位於大齒 之齒炎線L1與連結齒之齒尖線L2之間。而且中心齒3〇之齒 大位於中央大齒之齒尖線L3上，該齒尖線L3係連結第一中 央部2 1A之大齒3 1中位於中心齒3〇之兩側且分別位於最靠 近中心齒30的位置之一對大齒31之齒尖的線。即，中央大 齒之齒尖線L3與中心軸方向a(圖4中之直線LA)平行，因 此位於中心齒30之兩側且分別位於最靠近中心齒3〇的位置 之2個大齒3 1之齒尖與中心齒3〇之齒尖，均位於與中心軸 方向A平行之同一平面上。 正自紙盒本體13抽出之包裝膜12構成與中心軸方向八大 致平行之平面。因此，即便切斷刀2〇接觸於正自紙盒本體 1 3抽出之包裝膜〖2，此亦係由位於中心齒3 〇之兩側且分別 位於最靠近中心齒30之位置的2個大齒3丨之齒尖與中心齒 3〇之齒尖大致同時地接觸於包裝膜12所引起。由此，即便 因切斷刃20接觸於正抽出之包裝膜12而導致於兩者之間產 生動摩擦，包裝膜12由此而受到之力亦會在除中心齒3〇之 齒尖所接觸之部位以外還有2個大齒3丨之齒尖所接觸之部 位的3個部位分散開。因此，與僅中心齒3〇之齒尖接觸於 包裝膜12之情形相比，作用於包裝膜12之局部性之力得以 降低，藉此可抑制包裝膜12產生縱裂。 於包裝膜12之抽出結束而開始利用切斷刃2〇切斷包裝膜 12時，用拿住紙盒本體13之手之大拇指按壓蓋體“之前側 壁之中央附近，藉此使張力集中作用於中心軸方向A上之 包裝膜12之中央部。因此，包裝膜12不構成與中心轴方向 151405.doc •15· 201127712 A大致平行之平面，而以中 τ。和万向A上之包裝膜12之中 央被按塵於中心齒3〇、, 且中〜軸方向Α上之包裝膜12之兩 端部自切斷刀20離開之方彳姑# 雕開之方式撓曲。因此，並非如包裝膜12 之抽出時般位於中心齒30之兩側且分別位於最靠近中心齒 3〇之位置的2個大齒31之齒尖與中心齒3()之齒尖同時接觸 於包裝膜12，而是中心齒3〇之齒尖先於2個大齒3ι之齒尖 接觸並刺入包裝膜12。因此，可用較小的力而開始利用第 一中央部21A切斷包裝膜12。 自基準線L0與中心机之交點p至中心齒3〇之齒尖之距 離即中心齒高H〇,可藉由下式（1)而求得。其中’式⑴ 中，D為位於最靠近中心齒3〇之位置的大齒31之齒尖盥中 心線CL之間之距離，H1M分別為之前所說明之大齒高及 v字之内角。 HO=Hl/CQS((18〇D/2)_Dxtan((18()G0)/2)⑴ 切斷刃20之第-中央部21A之中心齒高h〇、大齒高出、 中齒高H2及小齒高H3分別以例如以下方式設定。即中心 齒高HO :⑶麵，大齒高H1 : ! 7 _，中齒高犯：i 2職， 小齒 if?H3 : 0.8 mm。 如以上所說明，根據本實施形態可獲得以下效果。 ⑴於本實施形態之切斷刃2G之情形時，即便切斷刃2〇 接於正自觸紙盒本體13抽出之包裝膜12,此亦係由位於中 心齒30之兩側且分別位於最靠近中心齒％之位置的2個大 齒31之啬尖與中心齒3G之齒央大致同時接觸於包裝膜朗 引起。因由匕’即便因切斷刃2〇接觸於正抽出之包裝膜咖 151405.doc • 16 · 201127712 導致於兩者之間產生動摩擦，包裝膜12由此而受到之力亦 不會集中於i個部位而是分散開。因此，作用於包裝膜口 之局部性之力得以降低，藉此可抑制包裝膜12產生縱裂。 ⑺於開始利用第一中央部21A切斷包裝膜12時與包 裝膜12之抽出時不同’中心齒3〇之齒尖先於位於中心齒邛 之兩側且分別位於最靠近中心齒3〇之位置的2個大齒^之 齒尖而接觸並刺入包裝膜12。因此，可用較小的力而開始 包裝膜12之切斷。 再者，上述貫施形態可進行以下變更。 中心齒30之齒尖亦可位於大齒之齒尖線以與+央大齒之 齒尖線L3之間。此時，中心齒3〇之齒尖位於較大齒之齒尖 線!^而更靠基準線L〇之位置，因此與使中心齒批齒高與 大齒31之齒高相同之情形不同，於包裝膜12之抽出時中心 齒3〇難以接觸於包裝膜12。因此，即可抑制包裝膜12產生 縱裂’又可於開始利用切斷刀2〇切斷包裝膜12時使中心齒 3 0確實地刺入包裝膜1 2。 中心㈣之齒尖亦可位於中央大齒之齒尖線㈣連結齒 之齒尖線L2之間。此情形下，當切斷刀叫妾觸於正抽出之 包裝膜12時’位於中心齒3〇之兩側且分別位於最靠近中心 齒30之位置的2個大齒31接觸於包裝膜12，藉此可獲得與 上述（1)中所記载者類似之效果。 切斷刀2〇之兩端部22並不限定為沿著中心轴方向A延伸201127712 VI. OBJECTS OF THE INVENTION: TECHNICAL FIELD The present invention relates to a cutting blade used for cutting a packaging film or a package of (4), and the like, and more particularly to a roll for self-contained packaging. A cutting blade attached to a paper cassette, a paper box having the cutting blade, and a package supply body, which are used for cutting the package taken out of the paper cassette. [Prior Art] As described in Patent Document 1, a paper cassette including a roll for storing a package such as a packaging film, and a package supply body for a cutting blade attached to the paper cassette are well known. (4) The carton generally comprises: a bottomed box-shaped carton body having an opening on the upper surface thereof; and a cover body rotatably coupled to the rear wall of the carton body to open and close the opening σ of the carton body. a zigzag cutting blade extending along substantially the entire front wall in a direction parallel to the central axis of the roll body in the carton body is attached to the front wall of the cover body, and the cutting blade is used for The body of the carton is cut by the package that is extracted by opening σ. As a cutting blade applied to the package supply body, there is proposed a cutting blade that improves the cutting property of the cutting blade with respect to the package, instead of being along the roll of the package. A cutting blade having a linear shape extending in a parallel direction is a V-shaped cutting blade having a vertex at a central portion of the cutting blade in a direction parallel to the central axis. The package supply body having the V-shaped cutting blade is usually cut in the following order. _, First of all: Use one hand to dry the paper tray body and use the other hand to pull out the package from the paper tray body. However, the center of the front wall of the cover body to which the cutting blade is attached is pressed against the carton body by the thumb of the hand holding the paper body. Thus, the package drawn from the previous I5I405.doc 201127712 is clamped between the front wall of the cover and the front wall of the carton body. Thereafter, by bending the wrist of the hand holding the carton body, the tip of the cutting edge of the lid is inserted into the drawn package to cut the package. In this way, the ascending material that has just been withdrawn is separated from the roll of the package in the carton. In this case, since the package is cut by the cutting blade from the center portion of the cutting edge having the v-shaped apex, the package can be reliably and easily cut. [Prior Art Document] [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei 09-202324 [Draft of the Invention] [Problems to be Solved by the Invention] For the cutting blade used in the cutting of the package, the package is The smaller the number of teeth that are pierced at the same time, the smaller the force required to cut the package when the cutting door is cut by the cutting blade. Therefore, in order to reduce the force required to start the cutting: the V-shaped cutting blade is usually configured such that it is located at the center of the cutting blade in a direction parallel to the central axis of the roll of the package. Among the teeth of the heart, the tip of the tooth protrudes more than the tip of the other tooth, that is, the tip of the tooth that is placed at the apex of the cutting blade is the most prominent. The heat of the tooth of the center tooth is larger than that of the other tooth. When the tip of the tooth protrudes, the tip of the center tooth contacts the package that is being drawn from the carton, and then moves along the package along the direction of the package relative to the center tooth, that is, along with the package. The center of the roll, the desired crack, the so-called longitudinal crack. The purpose of the present invention is to provide a slit for the longitudinal cracking of the wrapper for use in the package of i77^ „P. Knife, paper box and package having the same, 151405.doc 201127712 [Technical means for solving the problem] To achieve the above object, the third aspect of the present invention provides a roll for use along a package The cutting shaft that cuts the package by the center shaft. The second cutting edge includes a central portion having a plurality of teeth arranged in a v shape. The v-shape has an apex at a center of the cutting edge of the cutting blade in a direction parallel to the towel 4, and the plurality of teeth includes a center tooth disposed at a center in a direction parallel to the central axis of the cutting blade And a plurality of large teeth disposed at intervals from the center tooth to the ends of the plurality of teeth; and a plurality of connecting teeth 'separably disposed between the large teeth adjacent to each other. a line connecting the tip of the connecting tooth between the end of the plurality of teeth and the center tooth, that is, the line of the connecting tooth, which is at the same end of the arrangement of the plurality of teeth The line of the tooth tip of the large tooth with the center tooth, that is, the tooth tip line of the large tooth, closer to the tooth of the connecting tooth and the tooth of the large tooth, the tooth tip of the center tooth is located at the tooth tip line of the connecting tooth Between the tooth tip line of the above large teeth. Preferably, the tooth tip of the center tooth is located on the tooth tip line of the central large tooth. The tooth line of the central large tooth is connected to two large teeth on both sides of the center tooth and respectively at the position closest to the center tooth. The line of the tip of the tooth. A second aspect of the present invention provides a carton including a carton body that accommodates a roll of a package and has an opening for withdrawing the package; and a cover that is coupled to the carton The first type of cutting blade that can be used to cut the package from the opening (4) of the carton body is attached to the main body. I51405.doc 201127712 The type 3 male 楹徂A of the present invention provides a package supply body comprising: a roll body of a package; a paper box for accommodating the roll body; and a package for arranging the package Cut off the above mentioned above in the carton! The cutting edge of the type. [Effects of the Invention] According to the present invention, when the cutting blade comes into contact with the package which is taken out from the roll, it is located in the middle. The tips of the two large teeth on both sides of the tooth and located at the position closest to the center tooth will contact the tip of the center tooth or the package at the same time, even if the cutting edge is in contact with the package being withdrawn As a result, dynamic friction is generated between the two. The force that the package is subjected to will also be contacted at the two points where the teeth of the two large teeth are in contact, or the parts of the tooth tip of the center tooth are also included. The three parts are scattered. Therefore, the force acting on the locality of the package can be reduced as compared with the case where the tooth tip of only the center tooth is in contact with the package, whereby the longitudinal crack of the package can be suppressed. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to Figs. 1 to 4 . As shown in Fig. 1, the package supply body 本 of the present embodiment includes an elongated bottomed box-shaped carton body 3 having an opening at the upper portion. The opening of the carton body 丨3 can be opened and closed by the lid 14. The lid body 14 is coupled to the upper edge 13a of the back wall (rear side wall) of the carton body 13. The carton body 13 is formed by bending, for example, one sheet of thick paper, preferably one sheet of coated cardboard. On the inner side of the carton main body i 3, in other words, on the inner side of the carton including the carton body 13 and the lid body 14, a packaging film 12 as a package is received. The packaging film 12 is formed into a roll shape by being wound around a paper tube u. Therefore, the roll of the packaging film, that is, the central axis of the roll-shaped packaging film 12 is aligned with the central axis of the paper tube 11. In Fig. 1, the direction parallel to the central axis of the roll-shaped packaging film 12 is shown by the arrow eight table 151405.doc 201127712. Hereinafter, a direction parallel to the central axis of the roll-shaped packaging film 丨2 is also referred to as a central axis direction Α. The packaging film 12 is formed of, for example, polyvinylidene gas. The lower edge 14a of the front wall (front side wall) of the cover 14 includes the lower edge of the center axis direction eight! The central portion of 4a and the left and right ends on both sides of the central portion. The central portion of the lower edge is formed in a V shape having a vertex at the center of the lower edge of the central axis direction A. Each end portion of the lower edge i4a forms a linear shape parallel to the central axis direction a. A cutting edge 2 is attached to the back side of the front side wall of the lid body. The cutting blade 2 has a plurality of teeth arranged along the lower edge 14a. In the case where the packaging film 12 is cut by the package supply body 10, first, the carton body 13 is held by one hand to open the lid M, and the other end of the packaging film 12 is held by the other hand. After the tray body 13 is drawn out of the desired length of the packaging film 12, the lid body 14 is closed and the surface of the front side wall of the lid body 14 is pressed by the thumb of the hand holding the tray body, and the surface is aligned with the center axis. The rotation axis of the direction A is parallel to twist the carton body 13 at the center. Thereby, the tooth tips of the teeth at the center of the central axis direction a among the teeth of the cutting blade 20 are first pierced into the packaging film 12. Thereafter, the carton body 13 is further twisted, whereby the packaging film 12 is cut from the center of the central axis direction A toward both end portions in the central axis direction A. As shown in Fig. 2, a seal member 15 and an adhesive layer 16 are provided between the back surface 14b of the front side wall of the lid body 14 and the cutting blade 2'. The cutting (4) is followed by the sealing member 15 by the bonding layer 16. The ι_ 荇 sealing material 15 is followed by the back surface 14b of the cover 14 by, for example, ultrasonic follow-up. The wearer 1 <: mountain / ° is formed of a material containing, for example, an acrylic acid copolymer based on an ethylene-sulfonyl group 151405.doc 201127712. Next, the layer 6 is formed of, for example, a polyurethane-based adhesive. Thereby, the cutting blade 2 经由 passes through the sealing material with sufficient strength that it does not easily fall off from the lid body 14. And the second layer is attached to the lid body 14. As shown in Fig. 3, the cutting blade 2 includes a central portion 21 and two end portions 2 2 located at the center portion 21. The central portion 2 is formed in the central axis direction A. The center of the cutting blade 20 has a v-shape at the center. Each end portion 22 has a linear shape along the central axis direction A. The teeth of the cutting blade 2 are arranged in the teeth of the lower edge of the central portion 2, arranged The center of the cutting edge 2A in the central axis direction A has a v-shape at the center of the apex. The teeth of the cutting edge 20 are disposed at the lower edge of each end portion 22, and are arranged in a straight line along the center axis A of the center. The central portion 2 of the cutting blade 2 has a shape that is line-symmetric with respect to the center of the cutting edge 2〇 in the central axis direction A and which is a line extending perpendicularly to the central axis direction A, that is, the center line cL. Further, both end portions 22 of the cutting blade 20 are formed to be line-symmetric with respect to the center line. The central portion 21 of the cutting blade 20 includes a first central portion 21A including a cutting in the central axis direction A. a center of the blade 20; and a pair of second central portions 21B located at a right and left position of the first central portion 21A. Most of the teeth of 1A have a relatively large size, and most of the teeth provided in the second central portion 21B have a relatively small size. The V-shape depicted by the central portion 21 of the cutting blade 20 is disposed at the central portion 21 The inner angle θ of the v-shape drawn by the arrangement of the teeth of the lower edge is set to, for example, 172 5. The size of the cutting edge 20 in the central axis direction A, that is, the blade width W20 is set to, for example, 304 mm. The first center of the central axis direction A The size of the portion 21A, that is, the first central portion tWa 151405.doc 201127712 mm is set to, for example, 39_13 mm. The size of the second central portion 2ib of the central axis direction A, that is, the width of the second central portion is set to, for example, 92 76. The width of each end portion 22 of the direction A, that is, the end width|6 is set to, for example, π. The cutting blade 20 is exemplified by a non-metallic material such as paper, hardened paperboard, resin impregnated paper, or resin, and is exemplified by pET (for example, pET) pQiyethyiene terephthalate, polyethylene terephthalate (B) or polystyrene, but a biodegradable resin may be used in consideration of the environment. As a representative example of the biodegradable resin, polylactic acid or polyethanol may be mentioned. Acid Preferably, the polylactic acid-based resin composition is biaxially stretched and formed = the cutter "more specifically" is preferably a sheet which is obtained by biaxially stretching the resin composition of the polylactic acid (4). The cutting blade formed by cutting the cutting blade. The cutting blade 20 may contain an inorganic filler other than the resin, and may further contain a heat stabilizer, a light stabilizer, a water repellent material, a mold release agent, a pigment, and a dye. 4. The teeth of the first central portion 2A provided in the cutting blade 2A will be described in detail. As shown in Fig. 4, the first central portion 21A includes the center of the central portion 21A of the central axis direction a. Teeth 3 〇. The tooth tip of the center tooth 3 is located on the center line (^. Further, the first central portion 21A includes two large teeth 3 1 on the left and right sides of the center tooth 3 、, and the teeth 3 2 and i in the joint teeth 4 The small teeth 33, the center tooth 30, the large teeth 31, the middle teeth 32, and the small teeth 33 respectively have a pair of arcuate oblique sides that are recessed toward the inner side of the teeth. Two arcs of the respective tooth tips of the teeth The angle between the tangential lines of the oblique sides, that is, the tip angle 0a, is set to an angle suitable for the tip of the tooth to penetrate the packaging film 12. Specifically, the packaging film 12 is 151405.doc •10·201127712 Polyvinylidene chloride In the case of ethylene, the tip angle ea is preferably 30. 〜9 〇. More preferably 4CT~70. #尖角如物. The above teeth have higher durability. The tip angle is 90 The force required for the teeth of the following teeth to penetrate the packaging film 12 is small. The center of the ten-axis direction A, the large teeth 31, the middle teeth 32, and the small teeth 33 are the largest centers. The tooth width w〇, the large tooth width, the middle tooth width and the small tooth width Μ 'satisfy the center tooth width W0> the large tooth width Wl > the middle tooth width w2 > the small tooth width W3. The first of the cutting edge 20 in The tip angle of the central portion 21A, for example, the center tooth width chest, the large tooth width Wi, the middle tooth (four), and the small tooth width are respectively set as follows. The tip angle 0a: 45. ~ 60., the heart tooth tw〇 : 3 56 _, large tooth width ▽ 1:3.25 face 'medium tooth width ^: 2 49 嶋, small tooth width: 132 coffee. Each of the large tooth 31 and the middle tooth 32 - close to the center (four) in the oblique side The oblique side, that is, the inner oblique side (the left side oblique side if the large tooth 31 and the middle tooth 32 are disposed in the right half of the second central portion 21A) has a radius of curvature smaller than that from the center tooth 30. The slanting position of the position, that is, the outer oblique side (the slanted side of the right side if the large tooth 31 and the middle tooth 32 are disposed in the right half of the center portion 21A), therefore, the large tooth 3 ι The respective tooth tips of the middle teeth 32 are located near the center tooth direction 3 of the central axis direction A with respect to the position "between the one of the right and left sides of the tooth tip and the center of the tooth tip", that is, the inner side. The large tooth width 丨 is divided into the inner large tooth width π by a line extending through the tooth tips of the large teeth 31 and orthogonal to the central axis direction A. The outer large tooth width Wle is two parts. At this time, the relationship of the inner large tooth width wic < 15I405.doc 201127712 outer large tooth width Wle is satisfied. Further, by the tooth tip of each middle tooth 32 and the central axis direction A positive The line extending and intersecting 'divides the middle tooth width w2 into two parts of the inner middle tooth width W2c and the outer middle tooth width W2e. At this time, the inner middle tooth width W2c < outer outer middle tooth width W2e is satisfied. The small tooth width W3 is divided into two parts of the inner small tooth width W3c and the outer small tooth width W3e by a line extending from the tip of each small tooth 33 and orthogonal to the central axis direction A. At this time, the relationship between the inner small tooth width W3c < outer small tooth width W3e is satisfied. Therefore, the tip of each of the large teeth 31, the middle teeth 32, and the small teeth 33 becomes a posture toward the center of the packaging film 12 to be cut when the packaging film 12 is cut by the cutting blade 20, so that each tooth can be made The tip is pierced into the packaging film 12 well. The radius of curvature R 〇 c of the two oblique sides of the center tooth 30 is, for example, set to 2 3 8 mm. The radius of curvature ric of the oblique side of the inner side of each of the large teeth 31 and the curvature radius of the outer side of the oblique side Rle are respectively, for example, 3.19 mm and 3.42 mm. The radius of curvature R2c of the oblique side of the inner side of each of the middle teeth 32 and the radius of curvature R2e of the outer side of the oblique side are set to, for example, 2.08 mm and 2.31 mm, respectively. The curvature radius R3c of the oblique side inside the small teeth 33 and the curvature radius R3e of the outer oblique side are both set to, for example, 32 mm. The inner large tooth width wic and the outer large tooth width Wle of each of the large teeth 31 are set to, for example, 1.47 mm and 1.78 mm, respectively. The inner middle tooth width W2c and the outer middle tooth width W2e of the middle teeth 32 are set to, for example, 113 mm and 1.36, respectively. Mm. The inner small tooth width W3c and the outer small tooth width W3e of each of the small teeth 33 are set to, for example, 0.61 mm and 0.71 mm, respectively. In the first central portion 21A of the cutting blade 20, a pair of centering teeth 3 2 are disposed on the left and right sides of each of the large teeth 31 and the small teeth 33. More specifically, the size of the interval between the right half and the left half of the first central portion 21A is respectively 151405.doc •12·201127712 large teeth 3丨, and the two large teeth 3i The spacing between the large teeth 31 near the center tooth 30 and the center tooth 30 is equal. Further, the large teeth 31 and the center teeth of the right half and the left half of the first central portion 21A and the large teeth 31 and the central teeth 3 are respectively disposed between the two large teeth 3 Corresponding middle teeth 32 are respectively arranged between 30. Further, the remaining two middle teeth 32 of the right middle half of the first central portion 21A and the four middle teeth 32 of the first half portion, that is, the teeth 32 are separated from the farthest position from the center tooth 3, respectively. Small teeth 33 are disposed between the teeth 32 in the second distal position. The respective tooth bottoms of the large teeth 31, the middle teeth 32, and the small teeth 33 are located on a reference line l 延伸 extending in a v-shape similar to the shape depicted by the central portion 21 of the cutting edge 20 . The distance from the reference line L0 to the tip of the large tooth 31, that is, the large tooth height H1, the distance from the reference line L0 to the tooth tip of the middle tooth 32, that is, the middle tooth height 112, and the tip of the tooth line from the reference line L0 to the small tooth 33 The distance, that is, the small tooth height H3, is set to be the same as the tip angle. The size of the tooth tip piercing into the packaging film 12 is set. Among them, the relationship between the large tooth height H1 > the middle tooth height H2 > the small tooth height H3 is satisfied. In other words, the distance between the tooth edge line L1 of the large tooth and the reference line L〇, which is a line connecting the tips of the two large ridges of the right half and the left half of the first central portion 21A, is greater than the connection. The line of the tooth tips of the four middle teeth 32 provided in the same half of the first central portion 21A, that is, the distance between the tooth edge line L2 of the connecting teeth and the reference line. Further, the tooth tips of the i small teeth 33 provided in the right half and the left half of the first central portion 21A are respectively connected to the four middle teeth 32 of the same half of the first central portion 21A. The tooth tip line L2 of the tooth is closer to the reference line L0. The first central portion 21A of the cutting blade 20 has the above configuration, whereby when the packaging film 12 is cut by the first central portion 21A of 151405.doc •13·201127712, After the tooth tips of the large teeth 31 are pierced into the packaging film 12, the tooth tips of the teeth 32 between the large teeth 31 penetrate the packaging film 'and the tip of the small teeth 33 located between the middle teeth 32 and then pierce the package. Membrane 12. That is, the teeth disposed in the first central portion 21a are neither pierced into the packaging film 12' nor in the center of the first central portion 21A from the tooth direction at the center of the first central portion 21A in the central axis direction a. The order of the teeth of the end pierce the packaging film 12' but intermittently penetrates the packaging film 12° intermittently in the central axis direction a. Here, it is assumed that the tooth tips of the teeth of the first central portion 21A simultaneously penetrate the packaging film. 12 'This will require a lot of power. In this respect, according to the cutting blade 20' of the present embodiment, when the packaging film 12 is cut by the cutting blade 2, the number of the teeth of the packaging film 12 is small, and the number of the teeth can be relatively small. A small force begins to cut the packaging film 12. Further, it is assumed that the tooth tips of the teeth of the first central portion 2 are located at the ends of the first central portion 2 and 8 from the tooth direction at the center of the first central portion 21A located in the central axis direction A. When the packaging film 12 is pierced in the order of the cutting film 12, it is difficult to cut the packaging in accordance with the shape of the cutting blade 2 by the influence of the tension acting on the packaging film 12 when the packaging film 12 is cut by the first central portion 21A. In this respect, according to the cutting blade 20 of the present embodiment, the teeth of the first central portion 21A are intermittently penetrated into the packaging film 12 in the central axis direction A, thereby acting on the packaging film 丨2. The above tension is small, and as a result, the packaging film 丨2 can be stably cut by the first center portion 2A. Therefore, the cutting of the tip of the cutting blade 20 into the packaging film 12 and the subsequent cutting of the wrapping film 12 can be smoothly transferred from the first central portion 21a to the second central portion 21B of the cutting blade. 151405.doc 14 201127712 On the other hand, the tooth tip of the center tooth 3 of the first central portion 21 is located between the tooth line L1 of the large tooth and the tooth edge line L2 of the coupling tooth. Moreover, the tooth of the center tooth 3〇 is located on the tooth tip line L3 of the central large tooth, and the tooth line L3 is connected to the two sides of the center tooth 3〇 of the large tooth 3 1 of the first central portion 2 1A and is located at the most A line near one of the positions of the center tooth 30 to the tip of the large tooth 31. That is, the tooth tip line L3 of the center large tooth is parallel to the central axis direction a (the straight line LA in FIG. 4), and therefore the two large teeth 3 located on both sides of the center tooth 30 and located at the position closest to the center tooth 3〇, respectively. The tip of the tooth of 1 and the tip of the center tooth 3 are located on the same plane parallel to the direction A of the central axis. The packaging film 12 that is being taken out from the carton body 13 constitutes a plane that is substantially parallel to the direction of the central axis. Therefore, even if the cutting blade 2 is in contact with the packaging film 2 which is taken out from the carton main body 13, the two are located on the both sides of the center tooth 3 且 and are located at the position closest to the center tooth 30, respectively. The tooth tip of the tooth 3 与 is caused by the tooth tip of the center tooth 3 大致 contacting the packaging film 12 substantially simultaneously. Therefore, even if the cutting blade 20 comes into contact with the packaging film 12 being withdrawn, dynamic friction occurs between the two, and the force applied to the packaging film 12 is also contacted by the tip of the center tooth 3〇. In addition to the location, there are three locations in which the teeth of the two large teeth are in contact with each other. Therefore, the local force acting on the packaging film 12 is reduced as compared with the case where only the tooth tip of the center tooth 3 is in contact with the packaging film 12, whereby the longitudinal crack of the packaging film 12 can be suppressed. When the packaging film 12 is cut and the cutting film 12 is cut by the cutting blade 2, the lid body of the front side wall is pressed against the thumb of the hand holding the carton body 13 to thereby concentrate the tension. The central portion of the packaging film 12 in the central axis direction A. Therefore, the packaging film 12 does not constitute a plane substantially parallel to the central axis direction 151405.doc •15·201127712 A, and is packaged in the middle τ and the universal A. The center of the film 12 is deflected by the center tooth 3〇, and the two ends of the packaging film 12 on the middle-axis direction of the film are deflected by the cutting edge of the cutting blade 20. Therefore, it is not like packaging. When the film 12 is drawn out, the tip of the two large teeth 31 located at the two sides of the center tooth 30 and located at the position closest to the center tooth 3〇 and the tooth tip of the center tooth 3 () simultaneously contact the packaging film 12, and The tooth tip of the center tooth 3〇 comes into contact with the tooth tip of the two large teeth 3ι and pierces the packaging film 12. Therefore, the packaging film 12 can be cut by the first central portion 21A with a small force. The distance between the intersection point of L0 and the center machine to the tooth tip of the center tooth 3〇, that is, the center tooth height H〇, can be borrowed It is obtained by the following formula (1). In the formula (1), D is the distance between the center line CL of the tooth tip 位于 of the large tooth 31 located closest to the center tooth 3〇, and H1M is respectively described above. Large tooth height and inner angle of v. HO=Hl/CQS((18〇D/2)_Dxtan((18()G0)/2)(1) Center tooth height h of the first central portion 21A of the cutting edge 20〇 The large tooth height, the middle tooth height H2, and the small tooth height H3 are respectively set, for example, in the following manner: the center tooth height HO: (3) plane, the large tooth height H1 : ! 7 _, the middle tooth high crime: i 2 position, small The tooth if?H3 is 0.8 mm. As described above, according to the present embodiment, the following effects can be obtained. (1) In the case of the cutting blade 2G of the present embodiment, even if the cutting blade 2 is attached to the main body of the contact cassette 13 the drawn packaging film 12, which is also formed by the tips of the two large teeth 31 located on both sides of the center tooth 30 and located at the position closest to the center tooth %, and the tooth center of the center tooth 3G is substantially simultaneously in contact with the packaging film. Lang caused. Because of the fact that even if the cutting blade 2 is in contact with the packaging film that is being pulled out, 151405.doc • 16 · 201127712 causes a dynamic friction between the two, and the packaging film 12 is thereby subjected to The force is not concentrated on the i-parts but is dispersed. Therefore, the force acting on the locality of the packaging film opening can be reduced, whereby the longitudinal cracking of the packaging film 12 can be suppressed. (7) The first central portion 21A is used at the beginning. When the packaging film 12 is cut, it is different from the drawing of the packaging film 12. The tooth tips of the center tooth 3 先 precede the teeth of the two large teeth located on the sides of the center gingival and respectively located closest to the center tooth 3 〇. The tip is in contact with and pierces the packaging film 12. Therefore, the cutting of the packaging film 12 can be started with a small force. Furthermore, the above-described embodiments can be modified as follows. The tip of the center tooth 30 may also be located between the tip line of the large tooth and the tip line L3 of the + central tooth. At this time, the tooth tip of the center tooth 3〇 is located at the tooth tip line of the larger tooth and is closer to the reference line L〇, and thus is different from the case where the tooth height of the center tooth is the same as the tooth height of the large tooth 31, The center tooth 3〇 is difficult to contact the packaging film 12 when the packaging film 12 is taken out. Therefore, the longitudinal deformation of the packaging film 12 can be suppressed, and the center tooth 30 can be surely penetrated into the packaging film 12 when the cutting film 12 is started to be cut by the cutting blade 2 . The tip of the center (4) may also be located between the tooth tip line of the central large tooth (4) and the tip line L2 of the connecting tooth. In this case, when the cutting blade is called to touch the packaging film 12 being withdrawn, the two large teeth 31 located on both sides of the center tooth 3〇 and located at the position closest to the center tooth 30 are in contact with the packaging film 12, Thereby, effects similar to those described in the above (1) can be obtained. The both end portions 22 of the cutting blade 2 are not limited to extend along the central axis direction A.
之直線狀’例如，亦可為.VL命a A 刀J马〜與中心軸方向A交又之方向延 伸之直線狀。此時，亦可獲得與上述實施形態之情形相同 J51405.doc 201127712 之效果。 切斷刀20之第二中央部21B及兩端部22之各自上所設置 之齒既可為齒高均相同者，亦可為齒高不同者。或者，亦 可使用齒尖朝向切斷刃20之中央之齒或齒尖朝向切斷刃2〇 之端部之齒。 【圖式簡單說明】 圖1係表示本發明之一實施形態之包裝物供給體之立體 圖； 圖2係表示切斷刀相對於圖〗之包裝物供给體之蓋體之安 裝部分的剖面圖； 圖3係表示^之包裝物供給體之切斷刃之前視圖；及 圖4係表示圖3之切斷刀之第一中奂邱 圖。 矛甲夬之一部分的前視 【主要元件符號說明】 10 包裝物供給體 11 紙管 11A 中心轴 12 包裝膜 13 紙盒本體 13a 紙盒本體之後側壁之上緣 14 蓋體 14a 蓋體之前側壁之下緣 14b 蓋體之前側壁之背面 15 密封材 15I405.doc 201127712The linear shape 'for example, may be a linear shape in which the .VL life a A knife J horse is extended in the direction of the central axis direction A. At this time, the same effect as in the case of the above embodiment can be obtained by J51405.doc 201127712. The teeth provided on the second central portion 21B and the both end portions 22 of the cutting blade 20 may have the same tooth height or different tooth heights. Alternatively, the teeth whose tooth tips are directed toward the center of the cutting edge 20 or the teeth whose teeth are directed toward the end of the cutting edge 2〇 may be used. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a package supply body according to an embodiment of the present invention; and Fig. 2 is a cross-sectional view showing a mounting portion of a cutting blade with respect to a cover body of a package supply body of the drawing; Fig. 3 is a front view showing a cutting edge of the package supply body of Fig. 3; and Fig. 4 is a first middle view showing the cutting blade of Fig. 3. Front view of one part of the spear armor [Main component symbol description] 10 Package supply body 11 Paper tube 11A Center shaft 12 Packaging film 13 Carton body 13a Carton body rear side wall upper edge 14 Cover body 14a Front side wall of cover body Lower edge 14b The back side of the front side of the cover 15 Sealing material 15I405.doc 201127712
16 20 21 21A 21B 22 30 31 32 33 A CL D HO HI H2 H3 LO LI L2 L3 LA P 接著層 切斷刃 切斷刃之中央部 切斷刃之第一中央部 切斷刃之第二中央部 切斷刃之端部 中心齒 大齒 中齒 小齒 中心轴方向 中心線 位於最靠近中心齒30之位置的大齒31之齒尖與 中心線CL之間之距離 中心齒高 大齒vfj 中齒高 小齒尚 基準線 大齒之齒尖線 連結齒之齒尖線 中央大齒之齒尖_線 直線 交點 151405.doc 19- 201127712 ROc 中心齒30之兩斜邊之曲率半徑 Rlc 大齒3 1内側之斜邊之曲率半徑 Rle 大齒3 1外側之斜邊之曲率半徑 R2c 中齒3 2内側之斜邊之曲率半徑 R2e 中齒3 2外側之斜邊之曲率半徑 R3c 小齒3 3内側之斜邊之曲率半徑 R3e 小齒3 3外側之斜邊之曲率半徑 Wa 第一中央部寬 Wb 第二中央部寬 We 端部寬 WO 中心齒寬 W1 大齒寬 Wlc 大齒3 1之内側大齒寬 Wle 大齒3 1之外側大齒寬 W2 中齒寬 W2c 中齒32之内側中齒寬 W2e 中齒32之外側中齒寬 W3 小齒寬 W3c 小齒3 3之内側小齒寬 W3e 小齒33之外側小齒寬 W20 刃寬 Θ V字之内角 0a 齒尖角 151405.doc -20-16 20 21 21A 21B 22 30 31 32 33 A CL D HO HI H2 H3 LO LI L2 L3 LA P Next, the second central part of the cutting edge of the first central portion of the cutting edge of the central cutting blade The center tooth of the end of the cutting edge, the center line of the small tooth in the center axis direction, the center line of the large tooth 31 located closest to the center tooth 30, the distance between the tooth tip and the center line CL, the center tooth height, the tooth height in the large tooth vfj The small tooth is still the reference line. The tooth tip line of the large tooth is connected to the tooth tip line. The tooth point of the center large tooth _ line straight line intersection 151405.doc 19- 201127712 ROc The radius of curvature of the two oblique sides of the center tooth 30 Rlc Large tooth 3 1 inside Curvature radius of the oblique side Rle Large tooth 3 1 Curvature radius of the oblique side of the outer side R1c The radius of curvature of the oblique side of the inner side of the tooth 3 2 R2e The radius of curvature of the side of the tooth 3 2 outside the edge R3c Small tooth 3 3 Radius of curvature R3e Curvature radius of the bevel of the outer side of the small tooth 3 3 Wa. First central portion width Wb Second central portion width We end width WO Center tooth width W1 Large tooth width Wlc Large tooth 3 1 inner large tooth width Wle large tooth 3 1 outside the large tooth width W2 medium tooth width W2c in the inner side of the tooth 32 Wide W2e Medium tooth 32 Outer tooth width W3 Small tooth width W3c Small tooth 3 3 Inner small tooth width W3e Small tooth 33 Outer side small tooth width W20 Edge width Θ V-shaped inner angle 0a Tooth angle 151405.doc -20 -