200803768 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種嵌合具以及附嵌合具之袋體。 本申請案係對於2006年1月23日所提出申請之曰本 專利第2006 — 013732號主張優先權，在此援用其内容。 【先前技術】 已知有一種附嵌合具之袋體（拉鍊袋），藉由在袋體本 體之開口部附近内面安裝帶狀之嵌合具（拉鍊帶），而可開 閉自如（例如專利文獻1)。該嵌合具具備第1帶體（形成 有突條嵌合公部）、第2帶體（形成有凹條嵌合母部），嵌 合公部與嵌合母部以裝卸自如的方式嵌合著。 此附嵌合具之袋體，係以開口部側較嵌合具來得容易 開封之方式壓低嵌合強度。是以，當内侧之袋體本體内壓 高於嵌合具之情況，嵌合公部會受到該内壓之作用而自嵌 合母部脱離，附嵌合具之袋體會被開封，此為問題所在。 用以解決此問題之附嵌合具之袋體，已有人提出一種 附嵌合具之袋體，其具備：第1帶體（形成有嵌合公部以 及於嵌合公部兩侧平行設置之2條突起部），以及第2帶體 (形成有嵌合母部以及於嵌合母部兩侧平行設置之2條突 起部）（例如專利文獻2)。 此附嵌合具之袋體，當袋體本體之内壓變高，袋體本 體内側之第1帶體與第2帶體之間隔相較於嵌合公部以及 嵌合母部擴大之際，較嵌合公部位於袋體本體開口部側之 5 200803768 第1帶體的突起部，以及相對應之第2帶體的突起部會相 互衝突，藉以抑制嵌合公部自嵌合母部脱離。 但是，此附嵌合具之袋體，由於突起部係於嵌合公部 與嵌合母部之兩侧各設置2條，當相較於嵌合具自開口部 侧開封時，袋體本體内侧之第1帶體的突起部與相對應之 第2帶體的突起部會發生衝突。是以，開口部侧較嵌合具 不易開封，此為問題所在。 (專利文獻1)日本特開2005 — 131185號公報。 (專利文獻2)美國專利第5368394號說明書。 【發明内容】 發明所欲解決之課題 是以，本發明之目的在於提供一種嵌合具，其對於袋 體本體之内壓有高嵌合強度，且可自袋體本體之開口部侧 輕易地進行開封；另提供一種附嵌合具之袋體，其對於袋 體本體之内壓有高嵌合強度，且可自袋體本體之開口部側 輕易地進行開封。 用以解決課題之手段 本發明之嵌合具，具備：第1帶體，其具有突條嵌合 公部以及於該嵌合公部一侧平行設置之突起部；以及第2 帶體，其具有嵌合母部，該嵌合母部能以裝卸自如的方式 嵌合於嵌合公部；其特徵在於：突起部係以當無突起部側 200803768 的第1帶體與第2帶體之間隔擴大之時會和嵌合母部之侧 面產生抵接的方式所設置者。 突起部亦可在無突起部侧的第1帶體與第2帶體之間 隔擴大之前自嵌合母部隔開。 本發明之附嵌合具之袋體，其特徵在於，具備：具有 開口部之袋體本體，以及申請專利範圍第1或2項之嵌合 具；嵌合具係以突起部相較於嵌合公部位於開口部側的方 式安裝於袋體本體開口部附近之内面。 發明效果 依據本發明之嵌合具，可得到一種附嵌合具之袋體， 其對於袋體本體之内壓有高嵌合強度，且可自袋體本體開 口部侧輕易開封。 本發明之附嵌合具之袋體，其對於袋體本體之内壓有 高嵌合強度，且可自袋體本體開口部侧輕易開封。 【實施方式】 第一圖係表示本發明之嵌合具一例之剖面圖。嵌合具 10具備··第1帶體40，其具有突條嵌合公部20以及於該 嵌合公部20 —側平行設置之突條之突起部30 ;以及第2 帶體60，其具有可裝卸自如地嵌合於嵌合公部20之凹條 嵌合母部50。 嵌合公部20係由：幹部21 (自第1帶體本體41呈近 似直角立起而於第1帶體本體41之長邊方向延伸），以及 7 200803768 於該幹部21前端處形成之剖面半圓形頭部22所構成。 於頭部22形成有朝側方突出之第1公卡止爪部23與 第2公卡止爪部24。 嵌合母部50係由：第1臂部51 (自第2帶體本體61 呈剖面近似圓弧狀立起，於第2帶體本體61之長邊方向延 伸），以及第2臂部52所構成。 於第1臂部51之前端形成有朝嵌合公部20側突出之 第1母卡止爪部53。又，於第2臂部52之前端形成有朝 嵌合公部20側突出之第2母卡止爪部54。 由第1臂部51與第2臂部52所形成之剖面半圓形凹 部55内，嵌合住嵌合公部20之頭部22。於母卡止爪部53 與母卡止爪部54之間形成有與嵌合公部20之幹部21同等 程度之寬度的間隙。 第1母卡止爪部53所抵接之第1公卡止爪部23之面 係朝第2帶體60侧傾斜。藉此，第1公卡止爪部23與第 1母卡止爪部53之卡合力變弱，第1母卡止爪部53變得 容易自第1公卡止爪部23脫離。 又，第2母卡止爪部54所抵接之第2公卡止爪部24 之面係朝第1帶體本體41側傾斜。藉此，第2公卡止爪部 24與第2母卡止爪部54之卡合力被維持，第2母卡止爪 部54變得不易自第2公卡止爪部24脫離。 突起部30於無突起部30侧之第1帶體40與第2帶體 60之間隔擴大之時，以能與嵌合母部50侧面抵接的方式 來設置即可。是以，在無突起部30侧之第1帶體40與第 200803768 2帶體60之間隔擴大之前，可如第一圖般，突起部30抵 接於嵌合母部50之侧面（臂部51之侧面），亦可如第二圖 所示，突起部30自嵌合母部50 (臂部51)隔開。 又，突起部30之高度係以無突起部30侧之第1帶體 40與第2帶體60之間隔擴大之時，能抵接於嵌合母部50 侧面的方式來適宜設定。 嵌合具10之材料可舉出各種樹脂，以結晶性聚烯烴樹 脂為佳。結晶性聚烯烴樹脂可舉出聚乙烯、聚丙烯、乙烯 一乙酸乙稀共聚物、乙稀一 α —烯烴共聚物等聚烯烴系共聚 物。 結晶性聚烯烴樹脂之熔流速率（JIS Κ 7210)以 0.5〜20g/10分鐘為佳。若熔流速率未滿0.5g/10分鐘，擠壓 成形性差。若熔流速率超過20g/10分鐘，形狀安定性差。 嵌合具10之材料可視情況添加安定劑、抗氧化劑、潤 滑劑、抗靜電劑、著色劑等眾知之添加劑。 第1帶體本體41與第2帶體本體61可為單層亦可為 具有其他層之多層。其他層可舉出熱封層、耐熱層、阻隔 層等。 嵌合具10之製造方式為例如使用擠壓機將材料進行 熔融混練，並自具有與第1帶體40剖面以及第2帶體60 剖面相同開口形狀之特殊形狀模具中，將熔融完成之材料 擠壓而出，再藉由冷卻固化來製造。 第三圖係表示本發明之附嵌合具之袋體一例之前視 圖，第四圖係開口部附近之剖面圖。附嵌合具之袋體70具 9 200803768 備袋體本體80，以及嵌合具10。 袋體本體80係例如將2片薄膜81重疊，將周圍3邊 熔合為密封部82，而周圍1邊具有開口部83者。 薄膜81可為單層亦可為多層。圖示例之薄膜81係具 有基材層84與熱封層85之2層薄膜。基材層84可舉出結 晶性聚稀烴樹脂、聚酯系樹脂、聚醯胺系樹脂、金屬箔等。 基材層84可為單層亦可為多層。熱封層85可舉出聚烯烴 樹脂、聚酯系樹脂等。 嵌合具10係以突起部30相較於喪合公部20位於開口 部83侧的方式，安裝於袋體本體80之開口部83附近内面。 附嵌合具之袋體70之製造方式係例如於2片薄膜81 之間夾入嵌合具10，將薄膜81周圍3邊以熱封熔合為密 封部82,同時將嵌合具10藉由熱封來熔合於薄膜81内面。 為了充分發揮本發明之作用効果，於形成嵌合公部20 之面的相反側面（第1帶體本體41表面與薄膜81表面） 上，至少在與嵌合公部20以及突起部30相對應之位置熔 合著為佳。同樣地，於形成嵌合母部50之面的相反側（第 2帶體本體61表面與薄膜81表面）上，至少在與嵌合母 部50相對應之位置熔合著為佳。第1帶體本體41與薄膜 81，以及第2帶體本體61與薄膜81，為了避免在第1帶 體本體41與薄膜81之間或是在第2帶體本體61與薄膜 81之間形成間隙而造成内容物等侵入該間隙，以全面熔合 者為特佳。 以上所説明之嵌合具10，突起部30係以當無突起部 200803768 30侧之第1帶體40與第2帶體60之間隔擴大之時，以能 抵接於嵌合母部50侧面的方式來設置。是以，此嵌合具 10以突起部30相較於嵌合公部20位於開口部83侧的方 式，設置於袋體本體80之開口部83附近内面而形成之附 嵌合具之袋體70，其對於袋體本體80之内壓有高嵌合強 度，且可自袋體本體80開口部83侧輕易開封。 亦即，如第五圖所不’ 一旦袋體本體8 0内侧之内壓變 高，使得袋體本體80膨脹而造成第1帶體40與第2帶體 60之間隔擴大，袋體本體80之開口部83侧的第1帶體40 與第2帶體60之間隔會變窄。此時，由於第2公卡止爪部 24與第2母卡止爪部54維持著卡合狀態，嵌合公部20之 幹部21朝開口部83侧傾斜，嵌合母部50之臂部51朝開 口部83侧被施壓變形，造成母卡止爪部53與母卡止爪部 54之間隙有擴大之趨勢。但是，開口部83侧之第1帶體 40與第2帶體60之間隔一旦變窄，由於突起部30朝袋體 本體80内侧傾斜，故受到此傾斜突起部30之作用，與該 突起部30抵接之臂部51會被壓回袋體本體80之内侧，從 而抑制母卡止爪部53與母卡止爪部54之間隙的擴大，抑 制了嵌合公部20自嵌合母部50脱離。 另一方面，當自袋體本體80之開口部83侧進行開封 之際，由於突起部30未與嵌合母部50之側面抵接，故可 輕易開封。 若未設置突起部30，則如第六圖所示，一旦第1帶體 40與第2帶體60之間隔擴大，由於第2公卡止爪部24與 11 200803768 第2母卡止爪部54之卡人垮 2〇之幹部21朝開口部83 維：狀態下，故喪合公部 朝開口部83側被施壓變形，μ’敗合母部50之臂部51 54之間隙擴大，第2公卡、止爪部53與母卡止爪部 之卡合鬆脱，巍合公部2。止易 又，本發明之喪合具並易;^；合母部5〇脱離。山 公部亦可具有自第1帶體本體呈疋、圖不例。例如”欠合 部，而於各幹部之前端形成^U肖立敎2條幹 1。i，ΙΤϋ a f t朝耿5母部側突出之公卡止爪 祕的嵌:具:/、⑬由*合公部與喪合母部所構成之 實施例 以下表示實施例。 〔實施例1〕 準備由密度916kg/m3、溶流速率8 5g/1〇分鐘之乙稀 α浠扭共聚物（二井化學公司製造，ULTZEX (直 鏈狀低密度聚乙烯）201000J)60質量％與密度921kg/m3、 熔流速率5.0g/10分鐘之低密度聚乙烯（住友化學公司製 造，sumikathene (低密度聚乙烯）F412 — 1) 40質量％所 構成之樹脂組成物。 使用口徑4(hnm、L/D = 25之擠壓機將樹脂組成物於 160°C做熔融混練。 自具有與第一圖所示之第1帶體40之剖面以及第2帶 體60之剖面為相同開口形狀之特殊形狀模具中，將熔融完 12 200803768 成之樹脂組成物擠壓而出，導入冷卻水槽使其冷卻固化之 後’以捲繞機進行捲繞，得到具有突起部30之嵌合具1〇。 〔比較例1〕 除了變更為具有與第六圖所示之第1帶體40之剖面以 及第2帶體60之剖面為相同開口形狀之特殊形狀模具以 外，其餘與實施例1同樣來得到不具突起部30之嵌合具。 〔評估〕 使用東洋精機製作所製造之拉伸試驗機^ 「STROGRAPH」，以試驗速度50mm/分鐘來測定嵌合具每 50mm長度之後合強度。結果示於表1。 【表1】 嵌合強度（N/50mm) 安裝於袋體本體之際 成為開口部側之侧 安裝於袋體本體之際 成為内侧之側 實施例1 15 70 比較例1 15 50 〔實施例2〕 袋體本體用之薄膜係準備了由聚酿胺樹月旨層與直鏈狀 低密度聚乙烯（LLDPE)層所構成之2層積層薄膜（聚醯 層之層厚度一 15μπι、LLDPE層之厚度=50μιη)。於以 13 200803768 LLDPE層為内侧之2片積層薄膜之間夾入實施例1之嵌合 具10，使用附嵌合具之三方製袋機（商品名「SBM — 600 一 SSG」，西部機械股份有限公司製造）將薄膜周圍之3邊 加以熱封，同時將嵌合具10以突起部30相較於嵌合公部 20位於開口部83侧的方式，熱封於積層薄膜之内面得到 附嵌合具之袋體。即使對袋體本體内侧施加壓力，亦不易 自内侧開封，另一方面，自袋體本體之開口部侧可輕易開 封。 產業上可利用性 本發明之附嵌合具之袋體做為在食品、藥品、工業製 品等包裝上，尤其是可能自内侧施加高壓之包裝或是重量 物之包裝上所使用之包裝材為有用者。 【圖式簡單說明】 第一圖係表示本發明之嵌合具一例之剖面圖。 第二圖係表示本發明之嵌合具其他例之剖面圖。 第三圖係表示本發明之附嵌合具之袋體一例之前視 圖。 第四圖係第三圖中之IV —IV剖面圖。 第五圖係表示意欲自本發明之附嵌合具之袋體内侧進 行開封時樣子之剖面圖。 第六圖係表示意欲自習知附嵌合具之袋體内側進行開 封時樣子之剖面圖。 14 200803768 【主要元件符號說明】 10 嵌合具 20 嵌合公部 21 幹部 22 頭部 23 第1公卡止爪部 24 第2公卡止爪部 30 突起部 40 第1帶體 41 第1帶體本體 50 嵌合母部 51 第1臂部 52 第2臂部 53 第1母卡止爪部 54 第2母卡止爪部 55 凹部 60 第2帶體 61 第2帶體本體 70 附嵌合具之袋體 80 袋體本體 81 薄膜 82 密封部 83 開口部 84 基材層 15 200803768 熱封層 85 16200803768 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a fitting and a bag with a fitting. The present application claims priority to Japanese Patent Application No. 2006-013732, filed on Jan. 23, 2006, the disclosure of which is incorporated herein. [Prior Art] A bag body (zipper bag) with a fitting is known, and a band-shaped fitting (zipper tape) is attached to the inner surface of the opening of the bag body to be opened and closed (for example, a patent) Document 1). The fitting has a first belt body (with a protruding fitting male portion) and a second belt body (with a concave strip fitting female portion), and the fitting male portion and the fitting female portion are detachably attached. Co-authored. In the bag body with the fitting, the fitting strength is lowered so that the opening side is easier to open than the fitting. Therefore, when the inner body of the bag body has a higher internal pressure than the fitting, the fitting male part is detached from the fitting female body by the internal pressure, and the bag body with the fitting is opened. For the problem. A bag body with a fitting for solving the problem has been proposed, and a bag body with a fitting has been proposed, which is provided with: a first belt body (formed with a fitting male portion and arranged in parallel on both sides of the fitting male portion) The two protrusions) and the second belt body (the fitting mother portion and the two protrusion portions which are provided in parallel on both sides of the fitting mother portion) are formed (for example, Patent Document 2). In the bag body with the fitting, when the internal pressure of the bag body becomes high, the interval between the first tape body and the second tape body on the inner side of the bag body is larger than that of the fitting male portion and the fitting mother portion 5, the protrusion of the first belt body and the protrusion of the corresponding second belt body collide with each other, thereby suppressing the fitting of the male part from the fitting mother part. Get rid of. However, in the bag body with the fitting, the projection body is provided on each of the two sides of the fitting male portion and the fitting female portion, and the bag body is opened when the fitting is opened from the opening portion side. The protrusion of the first belt body on the inner side collides with the protrusion of the corresponding second belt body. Therefore, the side of the opening is more difficult to open than the fitting, which is a problem. (Patent Document 1) Japanese Laid-Open Patent Publication No. 2005-131185. (Patent Document 2) U.S. Patent No. 5,368,394. SUMMARY OF THE INVENTION The object of the present invention is to provide a fitting having high fitting strength to the inner pressure of the bag body and easily from the opening side of the bag body. The opening is provided; and a bag body with a fitting is provided, which has high fitting strength to the inner pressure of the bag body, and can be easily opened from the opening side of the bag body. Means for Solving the Problem A fitting according to the present invention includes: a first belt body having a protruding fitting male portion and a protruding portion provided in parallel on the fitting male portion side; and a second belt body The fitting mother portion is detachably attachable to the fitting male portion, and the protruding portion is formed by the first belt body and the second belt body having no protrusion side 200803768 When the interval is enlarged, it is set in such a manner as to abut against the side surface of the fitting female portion. The protruding portion may be separated from the fitting female portion before the first belt body and the second belt body on the side of the projectionless portion are enlarged. A bag body with a fitting according to the present invention includes: a bag body having an opening; and a fitting according to claim 1 or 2; the fitting is formed by a projection The commissure is attached to the inner surface of the vicinity of the opening of the bag body so as to be located on the side of the opening. EFFECTS OF THE INVENTION According to the fitting of the present invention, a bag body with a fitting can be obtained which has high fitting strength to the inner pressure of the bag body and can be easily opened from the opening side of the bag body. The bag body with the fitting of the present invention has high fitting strength to the inner pressure of the bag body, and can be easily opened from the opening side of the bag body. [Embodiment] Fig. 1 is a cross-sectional view showing an example of a fitting of the present invention. The fitting 10 includes a first tape body 40 having a protruding fitting portion 20 and a protruding portion 30 of a protruding portion provided in parallel with the fitting male portion 20 side, and a second tape body 60. The recessed fitting female part 50 which is detachably fitted to the fitting male part 20 is provided. The fitting portion 20 is composed of a trunk portion 21 (standing from the first belt body 41 at a substantially right angle and extending in the longitudinal direction of the first belt body 41), and a section formed at the front end of the trunk portion 21 by 200803768 The semicircular head 22 is constructed. The head portion 22 is formed with a first male snap claw portion 23 and a second male snap claw portion 24 that protrude laterally. The fitting arm portion 50 is composed of a first arm portion 51 (standing from the second belt main body 61 in a substantially arc-shaped cross section, extending in the longitudinal direction of the second belt main body 61), and the second arm portion 52. Composition. A first female locking claw portion 53 projecting toward the fitting male portion 20 is formed at the front end of the first arm portion 51. Further, a second female locking claw portion 54 projecting toward the fitting male portion 20 is formed at the front end of the second arm portion 52. The head portion 22 of the fitting male portion 20 is fitted into the cross-sectional semicircular concave portion 55 formed by the first arm portion 51 and the second arm portion 52. A gap having a width equal to the width of the trunk portion 21 of the fitting male portion 20 is formed between the female locking claw portion 53 and the female locking claw portion 54. The surface of the first male snap claw portion 23 to which the first female snap claw portion 53 abuts is inclined toward the second tape body 60 side. As a result, the engagement force between the first male locking claw portion 23 and the first female locking claw portion 53 is weakened, and the first female locking claw portion 53 is easily detached from the first male locking claw portion 23. Further, the surface of the second male snap claw portion 24 that the second female snap claw portion 54 abuts is inclined toward the first strap main body 41 side. As a result, the engagement force between the second male claw portion 24 and the second female locking claw portion 54 is maintained, and the second female locking claw portion 54 is less likely to be detached from the second male locking claw portion 24. The protrusion 30 may be provided so as to be able to abut against the side surface of the fitting female portion 50 when the distance between the first tape 40 and the second tape 60 on the side of the projection 30 is not increased. Therefore, before the interval between the first tape body 40 on the side of the non-protrusion portion 30 and the band 80803768 2 is widened, the protrusion portion 30 can abut on the side surface of the fitting mother portion 50 (arm portion) as in the first figure. As shown in the second figure, the protruding portion 30 may be spaced apart from the fitting female portion 50 (arm portion 51). Further, when the height of the projection 30 is increased by the distance between the first belt 40 and the second belt 60 on the side of the projection 30, the height of the projection 30 can be appropriately set so as to be in contact with the side surface of the fitting mother 50. The material of the fitting 10 can be exemplified by various resins, and a crystalline polyolefin resin is preferred. The crystalline polyolefin resin may, for example, be a polyolefin-based copolymer such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer or ethylene-α-olefin copolymer. The melt flow rate (JIS Κ 7210) of the crystalline polyolefin resin is preferably from 0.5 to 20 g/10 min. If the melt flow rate is less than 0.5 g/10 minutes, the extrusion formability is poor. If the melt flow rate exceeds 20 g/10 minutes, the shape stability is poor. The material of the fitting 10 may optionally contain additives such as stabilizers, antioxidants, lubricants, antistatic agents, colorants, and the like. The first tape body 41 and the second tape body 61 may be a single layer or a plurality of layers having other layers. The other layer may, for example, be a heat seal layer, a heat resistant layer, a barrier layer or the like. The manufacturing method of the fitting 10 is, for example, a material in which a material is melt-kneaded using an extruder, and a molten material is formed from a special-shaped mold having the same opening shape as that of the first belt 40 and the second belt 60. It is extruded and manufactured by cooling and solidification. Fig. 3 is a front view showing an example of a bag body with a fitting of the present invention, and Fig. 4 is a cross-sectional view showing the vicinity of the opening. A bag body 70 with a fitting 9 200803768 The bag body 80 and the fitting 10 are provided. The bag body 80 is formed by, for example, superimposing two sheets of film 81, and fuses the three sides to form a seal portion 82, and the periphery 1 has an opening portion 83. The film 81 may be a single layer or a plurality of layers. The film 81 of the illustrated example has a two-layer film of the substrate layer 84 and the heat seal layer 85. The base material layer 84 may, for example, be a crystalline polyolefin resin, a polyester resin, a polyamide resin, or a metal foil. The substrate layer 84 may be a single layer or a plurality of layers. The heat seal layer 85 may, for example, be a polyolefin resin or a polyester resin. The fitting 10 is attached to the inner surface of the vicinity of the opening 83 of the bag body 80 so that the protruding portion 30 is located on the side of the opening portion 83 than the funnel portion 20 is formed. The bag body 70 with the fitting is manufactured by sandwiching the fitting 10 between the two films 81, and heat-sealing the three sides of the film 81 into the sealing portion 82 while the fitting 10 is used. Heat sealing to fuse the inner surface of the film 81. In order to fully exert the effects of the present invention, at least the opposite side surface (the surface of the first belt main body 41 and the surface of the film 81) on the surface on which the fitting male portion 20 is formed corresponds to at least the fitting male portion 20 and the protruding portion 30. It is better to fuse the position. Similarly, it is preferable that the opposite side of the surface on which the fitting female portion 50 is formed (the surface of the second belt main body 61 and the surface of the film 81) is fused at least at a position corresponding to the fitting mother portion 50. The first belt body 41 and the film 81, and the second belt body 61 and the film 81 are formed between the first belt body 41 and the film 81 or between the second belt body 61 and the film 81. The gap causes the contents and the like to intrude into the gap, and is particularly excellent for the full fusion. In the fitting 10 described above, the projection 30 is capable of abutting against the side of the fitting female portion 50 when the distance between the first tape 40 and the second tape 60 on the side of the non-protrusion portion 20803768 30 is increased. The way to set it up. Therefore, the fitting 10 is formed on the inner surface of the opening 83 of the bag body 80 so that the protruding portion 30 is located on the opening 83 side of the fitting main body 20, and the fitting body is formed. 70, which has high fitting strength to the inner pressure of the bag body 80, and can be easily opened from the opening 83 side of the bag body 80. That is, as shown in the fifth figure, the internal pressure of the inside of the bag body 80 becomes high, so that the bag body 80 is inflated to cause the gap between the first tape body 40 and the second tape body 60 to be enlarged, and the bag body 80 is enlarged. The distance between the first tape body 40 on the side of the opening portion 83 and the second tape body 60 is narrowed. At this time, the second male claw portion 24 and the second female locking claw portion 54 are engaged with each other, and the trunk portion 21 of the fitting male portion 20 is inclined toward the opening portion 83 side, and the arm portion of the female portion 50 is fitted. The 51 is pressed and deformed toward the opening 83 side, and the gap between the female locking claw portion 53 and the female locking claw portion 54 tends to increase. However, when the distance between the first belt body 40 and the second belt body 60 on the opening portion 83 side is narrowed, the projection portion 30 is inclined toward the inside of the bag body 80, and thus receives the action of the inclined protrusion portion 30 and the protrusion portion. The abutting arm portion 51 is pressed back to the inner side of the bag body 80, thereby suppressing the enlargement of the gap between the female locking claw portion 53 and the female locking claw portion 54, and suppressing the fitting male portion 20 from the fitting female portion. 50 detached. On the other hand, when the opening portion 83 of the bag body 80 is opened, the projection 30 is not in contact with the side surface of the fitting female portion 50, so that the opening can be easily opened. When the projections 30 are not provided, as shown in FIG. 6, when the distance between the first belt 40 and the second belt 60 is widened, the second male claw portions 24 and 11 200803768 the second female claw portion The cadre 21 of the 之 〇 朝 朝 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 83 The engagement between the second male card and the claw portion 53 and the female locking claw portion is released, and the male portion 2 is folded. Further, the funeral apparatus of the present invention is easy; The public part of the mountain can also be represented by the body of the first belt body. For example, "the underlying part, and the front end of each cadre is formed. ^U Xiao Li 敎 2 dry 1. i, ΙΤϋ aft 耿 耿 5 female side protruding the male card claws secret embedded: with: /, 13 by * Gong EXAMPLES EMBODIMENT AND EMBODIMENT EMBODIMENT The following examples are shown. [Example 1] Ethylene α-twist copolymer having a density of 916 kg/m 3 and a flow rate of 8 5 g/1 〇 minutes (manufactured by Mitsui Chemicals Co., Ltd.) was prepared. , ULTZEX (linear low density polyethylene) 201000J) 60% by mass and density 921kg/m3, melt flow rate 5.0g/10 minutes of low density polyethylene (Sumitomo Chemical Co., Ltd., sumikathene (low density polyethylene) F412 - 1) A resin composition composed of 40% by mass. The resin composition was melt-kneaded at 160 ° C using an extruder having a diameter of 4 (hnm, L/D = 25). In the special-shaped mold in which the cross section of the belt body 40 and the cross section of the second belt body 60 have the same opening shape, the molten resin composition of 12 200803768 is extruded, and is introduced into a cooling water tank to be cooled and solidified. The machine is wound to obtain a fitting having a projection 30. [Comparative 1] A non-projection portion 30 is obtained in the same manner as in the first embodiment except that the mold having the same shape as the cross section of the first belt body 40 and the second belt body 60 shown in the sixth embodiment is changed. [Evaluation] The tensile strength of the fittings per 50 mm length was measured at a test speed of 50 mm/min using a tensile tester manufactured by Toyo Seiki Co., Ltd., "STROGRAPH". The results are shown in Table 1. [Table 1] 】 The fitting strength (N/50mm) is the side that is on the inside of the bag body when it is attached to the bag body when it is attached to the body of the bag. Example 1 15 70 Comparative Example 1 15 50 [Example 2] Bag body The film for the main body is prepared by a two-layer laminated film composed of a polystyrene tree layer and a linear low-density polyethylene (LLDPE) layer (the thickness of the polylayer layer is 15 μm, and the thickness of the LLDPE layer is 50 μm). The jig 10 of the first embodiment is sandwiched between two laminated films with the LLDPE layer on the inside of the 13 200803768 layer, and a three-way bag making machine with a fitting (trade name "SBM — 600 - SSG", west Machinery Co., Ltd.) will The three sides of the film are heat-sealed, and the fitting 10 is heat-sealed on the inner surface of the laminated film so that the protruding portion 30 is located on the side of the opening portion 83 so that the protruding portion 30 is attached to the inner surface of the laminated film. Even if pressure is applied to the inside of the bag body, it is not easy to open from the inside, and on the other hand, the opening side of the bag body can be easily opened. Industrial Applicability The bag with the fitting of the present invention is used as Packagings for food, pharmaceuticals, industrial products, etc., especially those that may be applied from the inside of a high-pressure package or a weighted package are useful. BRIEF DESCRIPTION OF THE DRAWINGS The first drawing shows a cross-sectional view of an example of a fitting of the present invention. The second drawing shows a cross-sectional view of another example of the fitting of the present invention. Fig. 3 is a front view showing an example of a bag body with a fitting of the present invention. The fourth figure is a sectional view of IV-IV in the third figure. Fig. 5 is a cross-sectional view showing a state intended to be unsealed from the inside of the bag body of the fitting of the present invention. The sixth figure shows a cross-sectional view of the appearance of the inside of the bag body which is intended to be self-study. 14 200803768 [Description of main component symbols] 10 fittings 20 fittings 21 cadres 22 heads 23 first male claws 24 second male claws 30 projections 40 first belt 41 first belt Body body 50 fitting female portion 51 first arm portion 52 second arm portion 53 first female locking claw portion 54 second female locking claw portion 55 concave portion 60 second belt body 61 second belt body 70 attached Bag body 80 bag body 81 film 82 sealing portion 83 opening portion 84 substrate layer 15 200803768 heat sealing layer 85 16