201143851 六、發明說明： 【發明所屬之技術領域】 本發明係關於—種在塵埃較多的場所 仃作業時防止吸入塵埃的面罩、以及調整施工現場等 固繩的有效長度的緊固繩長度調整料。整該面罩上的緊 【先前技術】 作為上述的習知面罩的一個例子 心广罩上的橡膠繩(緊固繩)雙折(對折技術： 的★(緊固繩長度詞整器具），並調 迷插通至空 υ，置’藉此調整橡膠繩的有效長度(例如，:::::: 度來 適，- 形的切槽_部和兩個彈性板夾住緊_，並調整由切ς 壁部和彈性板所夾住的緊固繩的位置，藉此調整緊固繩的 有效長度（例如，參照專利文獻2)〇 +該面罩上的繫緊用具在對具有彈性的板進行成形時， 藉由設置兩個υ字形的切槽而成為能夠同時形成兩個彈性 板的結構（形狀），因此能夠抑制零件費用。 另外’ 知面罩的另一個例子而言，曾提出如下技 術 」從設置於失具（緊固繩長度調 形狀的連接狹縫向設置在該連接狹縫之兩端 :使帶狀物（緊固繩）從設置於失具（緊固繩長度調整器具） 上的Σ形狀的連接狹縫向設置在該連狹縫之兩端的佩戴 4 323070 201143851 狹縫移動並由佩戴狹缝爽住帶狀物，藉由調整由佩戴狹缝 所失住的帶狀物的位置，而調整帶狀物的有效長度（例如， 參照專利文獻3)。 由於該面罩上的夾具是在對板進行成形時，藉由設置 連接狹縫和兩個佩戴狹縫而能夠形成的構造（形狀），從而 能夠抑制零件費用。 並且’由於使帶狀物從連接狹縫向兩個佩戴狹縫移動 而成為由兩個佩戴狹縫所夾住（卡止）帶狀物的構成（構 4)，因此容易進行帶狀物向夾具的插通（安裝）。 [先前技術文獻] 專利文獻1:日本特開平7_185〇27號公報 專利文獻2:日本特開2005-218號公報 專利文獻3 :日本特開2005-152229號公報 【發明内容】 (發明所欲解決之課題） 上述的專利文獻1所記載的面罩的管（緊固繩長度調 整器具）係難以將雙折（對折）的橡膠繩插通到空心狀的管， 而且非常麻煩，因此製造成本上升。 上述的專利文獻2所記載的面罩的繫緊用具（緊固繩 八調整器具）並未設置連接兩個切槽的連接槽。 因此’在藉由熔接等將緊固繩安裝在面罩主體之後’ 不能將繋緊用具安裝在緊固繩。 上述的專利文獻3所記載的面罩的夾具（緊固繩長度 調整器具）係設有連接兩個佩戴狹縫的連接狹縫。 5 323070 201143851 因此，在藉由熔接等將帶狀物安裝在面罩主體上之後， 也能將夾具安裝在帶狀物。 然而，由於專利文獻3中的夾具之佩戴狹縫和連接狹 縫朝安裝的帶狀物的寬度方向以直線狀連接，因此若為了 調整帶狀物的有效長度而拉伸帶狀物，則由於拉伸帶狀物 的方向而導致帶狀物從佩戴狹縫往連接狹縫脫離。 另外，專利文獻3中的夾具由於兩個連接狹縫從連結 狹縫的兩端向彼此分離的方向延伸，因此若為了調整帶狀 物的有效長度而拉伸帶狀物，則帶狀物向間隔變窄的方向 靠近，由此會有帶狀物從佩戴狹縫向連接狹縫脫離的可能 性。 因此，在使用面罩的過程中調整帶狀物的有效長度的 情況下，會有面罩從臉部脫落的可能性。 本發明是為了解決上述缺失而研創者，提供一種即使 在將緊固繩安裝在面罩主體之後也能夠安裝在緊固繩，且 在調整緊固繩的有效長度時緊固繩不會從卡止狹縫脫離之 面罩的緊固繩長度調整器具，以及使用該緊固繩長度調整 器具的面罩。 (解決課題之手段） 本發明之面罩的緊固繩長度調整器具的特徵在於：具 備板狀的主體部，且在該主體部上設有：具有規定的寬度、 規定的厚度且導入可彈性變形之緊固繩的導入孔；右端與 該導入孔連通，且將上述導入孔内的上述緊固繩向第一卡 止狹縫引導之往橫方向延伸的第一引導狹縫；左端與上述 6 323070 201143851 導入孔連通，且將上述導入孔内的上述緊固繩向第二卡止 狹縫引導之往橫方向延伸的第二引導狹縫；縱方向的中間 部分與上述第一引導狹縫的左端連通，且卡止來自上述第 一引導狹縫之上述緊固繩之往縱方向延伸的上述第一卡止 狹縫；以及縱方向的中間部分與上述第二引導狹缝的右端 連通，且卡止來自上述第二引導狹縫之上述緊固繩之往縱 方向延伸的上述第二卡止狹縫。 而且，本發明之面罩的特徵在於，使用上述之面罩的 緊固繩長度調整器具。 (發明之效果） 根據本發明之面罩的緊固繩長度調整器具，由於導入 孔和第一、第二卡止狹縫由第一、第二引導狹縫所連通， 因此即使在將緊固繩安裝在面罩主體之後，也能夠將面罩 的緊固繩長度調整器具安裝在緊固繩。 另外，第一卡止狹縫與第一引導狹縫交叉，並且第一 引導狹縫與第一卡止狹縫之縱方向的中間部分連通，第二 卡止狹縫與第二引導狹縫交叉，並且第二引導狹縫與第二 卡止狹縫的縱向的中間部分連通。 因此，在調整緊固繩的有效長度時，即使拉伸緊固繩， 形成第一卡止狹縫及第二卡止狹縫的壁部也會阻止緊固繩 往間隔變窄的方向靠近，因此緊固繩不會從第一、第二卡 止狹縫脫離。 【實施方式】 以下參照附圖對本發明的實施例進行說明。 7 323070 201143851 第1圖是表示本發明之面罩的緊固繩長度調整器具（以 下簡稱為“緊固繩長度調整器具”）之第—實施例的圖。 緊固繩長度5周整器具31是調整佩戴者佩戴面罩時所 使用的緊固繩之有效長度的器具，利用具有規定強度的塑 料（樹脂）、例如聚丙烯形成為俯視時呈橫長之長方形的板 狀’且由其四角的角為圓角的主體部32構成。 而且’緊固繩長度調整器具31不僅可以是長方形，而 且也可以是長圓狀或圓形形狀。 在該主體部32上設有導入孔33、第一引導狹縫34、 第一引導狹縫36、第一卡止狹縫38、第二卡止狹縫44等。 上述導入孔33係按照在橫長（第1圖（a)中的左右方向） 的主體部32的中央部分往縱方向（第1圖（a)中的上下方 向’以下亦同）能夠插入雙折（對折）的緊固繩的長度、寬度 的大小設置。 上述的第一引導狹縫34係以右端與導入孔33之縱方 向的左側中間部分、例如左側中央部分連通的方式，朝橫 方向（第1圖（a)中的左右方向，以下亦同）設置在主體部 32的左侧。 上述的第二引導狹縫36係以左端與導入孔33的縱方 向的右側中間部分、例如右侧中央部分連通的方式，朝橫 方向設置在主體部32的右側。 因此，第一引導狹縫34和第二引導狹縫36係位於朝 橫方向延伸的同一直線上。 並且，在第一引導狹縫34的右端部、亦即與導入孔 8 323070 201143851 33的連接部分，為了容易導入緊固繩而設有圓弧狀的第一 導引部35。 同樣地，藉由在第二引導狹縫36的左端部、亦即與導 入孔33的連接部分，為了容易導入緊固繩而設有圓弧狀的 第二導引部37。 上述的第一引導狹縫34及第二引導狹縫36的寬度（第 1圖（a)中的上下方向）係做成以下間隔··若拉伸可彈性變 形的緊固繩而處於使厚度變薄的狀態，則能夠使緊固繩移 動（通過）’若解除拉伸緊固繩而處於變厚的狀態，則不能 使緊固繩移動（通過）。 並且’由於緊固繩長度調整器具31本身也具有彈性， 因此緊固繩長度調整器具31的少許變形會發揮容易使緊 固繩移動的作用。 上述的第一卡止狹縫38係以第一引導狹縫34的左端 與縱方向的右侧中間部分、例如右側中央部分連通的方式， 朝縱方向設置在主體部32的左側。 上述的第二卡止狹縫44係以第二引導狹縫36的右端 與縱方向的左侧中間部分、例如左側中央部分連通的方式， 朝縱方向設置在主體部32的右侧。 因此，第一卡止狹縫38和第二卡止狹縫44平行地朝 縱方向延伸。 如此，藉由在主體部32設置第一卡止狹縫38，形成 第一卡止狹縫38的壁部之厚度方向（在第1圖（(：）中的上下 方向）的端部係構成卡止邊緣39。 9 323070 201143851 同樣地’藉由在主體部32設置第二卡止狹縫44，形 成第二卡止狹縫44的壁部之厚度方向的端部係構成卡止 邊緣45。 並且’在第一卡止狹縫38的兩端、亦即第一卡止狹縫 38的上下端設有收容緊固繩的寬度方向之端部的端部收 容孔40、42。 該端部收容孔40、42係做成比第一卡止狹縫38的寬 度（第1圖（a)中的左右方向）大的直徑，例如第—卡止狹縫 38的寬度的大約1倍至3倍之直徑的孔。 同樣地，在第二卡止狹縫44的兩端、亦即第二卡止狹 縫44的上下端設有收容緊固繩的寬度方向之端部的端部 收容孔46、48。 該端部收容孔46、48係做成比第二卡止狹縫44的寬 度（第1圖（a)中的左右方向）大的直徑，例如第二卡止狹縫 44的寬度的大約1倍至3倍之直徑的孔。 如此，藉由在第一卡止狹縫38的兩端設置端部收容孔 4〇、42，形成第一卡止狹縫38的壁部和形成端部收容孔 40、42的壁部之交叉部分係構成阻力邊緣41、43。 同樣地’藉由在第二卡止狹縫44的兩端設置端部收容 孔46、48，形成第二卡止狹縫44的壁部和形成端部收容 孔46、48的壁部之交叉部分係構成阻力邊緣47、49。 上述的第止狹縫38及第二卡止狹縫44的寬度（在 第1圖（a)中的左右方向）係做成以下間隔：若拉伸可彈性 變形的緊固繩而處於使厚度變薄的狀態，則能夠使緊固繩 323070 10 201143851 移動’若解除拉伸緊固繩而處於變厚的狀態，則不能使緊 固繩移動。 ’' 另外，從-方（上方）的端部收容孔4〇 _部通過第一 卡止狹縫38直到另-方（下方）的端部收容孔仏之端部的 長度L、以及從—方（上方）的端料容孔46之端部通過第 二卡止狹，縫44直到另一方（下方）的端部收容孔48之端部 的長度L係與緊固繩的寬度相同或 此外，主㈣32為了減少成形時的收縮、ΓΓ於補強 並且減少成形材料’藉由在兩主表面設置環繞的（環狀的） 薄壁部，在兩主表面的周邊設置環狀的外周補強肋50,並 且設有包圍兩主表面的導入孔33、第一、第二引導狹縫 34 36、第一、第二卡止狹縫38、44以及端部收容孔、 ^、46、48的環狀的内周補強肋51。 。參照附圖對應用（利用、使用）上述的緊固繩長度調整 器具31的本發明之面罩的實施例進行說明。 β第2圖是表示本發明的面罩之第一實施例的圖，第3 圖是表示第2圖所示的面罩之使用例的說明圖，第4圖是 表示緊_絲到緊_長度調整H具之安裝例的說明 圖’對於與第丨圖相同或相當的部分附註同—符號並省略 其說明。 此外’以下的面罩說明中的上下、左右是從面罩的佩 戴者來看的上下、左右。 第2圖以及第3圖所示的面罩i包括：形成為杯狀的 面罩主體部11 ;安裝在該面罩主體部n的上、下侧緊固 323070 11 201143851 繩21U、21D;以及安裝在該上、下側緊固繩則、_上 之用以調整上、下側緊固繩21U、21D的有效長度的緊固織 長度調整器具31。 上述的面罩主體部11係由例如以覆蓋人的鼻、口的方 式形成的過濾部所構成。 該過濾部係由覆蓋前面側的前面覆蓋部分、以及設置 在該前面覆蓋部分的外周且與人的鼻、口的外周抿接:觸 臉布所構成。 並且，前面覆蓋部分係例如做成多層構造，並構 能夠熔接或黏接緊固繩。 … *上述的上、下側緊固繩2iu、21D係由具有彈性的橡膠 帶等所構成，且具有規定的長度、規定的厚度、規定的寬 度。 並且，上側緊固繩21U的一端（左端）係藉由熔接等安 裝在面罩主體部11❾左端上側外表面，另-端（右端）則藉 由熔接等安裝在面罩主體部u的右端上侧外表面。 另外，下側緊固繩21D的一端（左端）係藉由熔接等安 裝在面罩主體部11的左端下侧外表面，另一端（右端）則藉 由熔接等安装在面罩主體部u的右端下侧外表面。 接著’參照第4圖對緊固繩長度調整器具31安裝到 上、下侧緊固繩21U、21D的一個例子進行說明。 首先’如第4圖（a)所示，將雙折（對折）的上侧緊固繩 21U插入到導入孔内。 然後’拉伸對折的上側緊固繩21U的一方使厚度變 12 323070 201143851 薄，並使其從第一引導狹縫34向第一卡止狹縫38移動， 如第4圖（b)所示，在使上側緊固繩21U之寬度方向的兩端 位於端部收容孔40、42内的狀態下解除拉伸上侧緊固繩 21U的力。 如此，若在使上側緊固繩21U之寬度方向的兩端位於 端部收容孔40、42内的狀態下解除拉伸上側緊固繩21U 的力，則藉由使上側緊固繩21U回到原來狀態的厚度，上 側緊固繩21U係被卡止在第一卡止狹縫38内，而成為兩端 部位於端部收容孔40、42内的狀態。 同樣地，拉伸對折的上側緊固繩21U之另一方而使厚 度變薄，並卡止在第二卡止狹縫44内，藉由使兩端部位於 端部收容孔46、48内，從而如第4圖（c)所示，能夠在上 側緊固繩21U安裝緊固繩長度調整器具31。 然後，同樣地藉由在下側緊固繩21D也安裝緊固繩長 度調整器具31，從而能夠成為第2圖所示的面罩1。 如上所述，根據本發明的緊固繩長度調整器具31，由 於導入孔33和第一、第二卡止狹縫38、44藉由第一、第 二引導狹縫34、36而連通，因此即使在將上下、側緊固繩 21U、21D安裝在面罩主體11之後，也能夠將緊固繩長度 調整器具31安裝在上、下侧緊固繩21U、21D。 另外，就緊固繩長度調整器具31而言，第一卡止狹縫 38和第一引導狹縫34交叉，並且第一引導狹縫34與第一 卡止狹縫38之縱方向的中間部分連通，第二卡止狹縫44 和第二引導狹縫36交叉，並且第二引導狹縫36與第二卡 13 323070 201143851 止狹縫44之縱方向的中間部分連通。 因此，在調整上、下側緊固繩21U、21D的有效長度時， 即使拉伸上、下侧緊固繩21U、21D的對折部分，形成第一 卡止狹縫38及第二卡止狹縫44的壁部也會阻止上、下侧 緊固繩21U、21D向間隔變窄的方向靠近，因此上、下側緊 固繩21U、21D不會從第一、第二卡止狹縫38、44往第一、 第二引導狹縫34、36脫離。 另外，由於在第一卡止狹縫38的兩端設有端部收容孔 40、42而形成阻力邊緣41、43，並且在第二卡止狹縫44 的兩端設有端部收容孔46、48而形成阻力邊緣47、49， 因此可藉由阻力邊緣41、43、47、49阻止上、下侧緊固繩 21U、21D之寬度方向的端部往中央移動，從而上、下側緊 固繩21U、21D更難以從第一、第二卡止狹縫38、44往第 一、第二引導狹縫34、36脫離。 另外，由於在第一引導狹縫34設有第一導引部35， 在第二引導狹縫36設有第二導引部37，因此能夠容易地 進行上、下侧緊固繩21U、21D從導入孔33往第一、第二 卡止狹縫38、44的移動。 另外’由於在第一卡止狹縫38的端部形成卡止邊緣 39，並且在第二卡止狹縫44的端部形成卡止邊緣45，因 此可藉由卡止邊緣39、45阻止上、下侧緊固繩21U、21D 在長度方向被拉伸而造成有效長度變長，從而上、下侧緊 固繩21U、21D的有效長度難以變化。 以下對佩戴面罩1的一個例子進行說明。 14 323070 201143851 二先以=入位於面罩主體部11下側的下側緊固 II鼻及π的方式佩戴面罩主體部u 下侧緊固繩21D沿著頭部的後方下部。 便 ^後’藉由使位於面罩主體部u上側的上側緊固繩 頭部的後方上部，從而如第3圖所示，能夠將面 卓1作為兩根繩綁在頭上形式來佩戴。 在如上方式佩戴面罩1的狀態下，當上、下側緊固繩 21U、21D的緊固力強或弱時，藉由拉伸上下側緊固繩則、 21D的對折的部分使其變薄，並操作緊_長度調整器具 31使其相對於上、下側緊固繩21U、21])移動，將上、下 側緊固繩21U、21D的環狀部分的長度、亦即有效長度調整 成所希望的長度，從而調整成所希望的緊固力。 第5圖是表示本發明的面罩之第二實施例的前視圖， 第6圖是表示第2圖所示的面罩之使用例的說明圆，對於 與第1圖至第4圖相同或相當的部分附註同一符號並省略 其說明。 第5圖以及第6圖所示的面罩1A包括：形成為杯狀的 面罩主體部丨1;安裝在該面罩主體部11的左、右側緊固 繩21L、21R ;以及安裝在該左、右側緊固繩21L ' 21R上 之用以調整左、右侧緊固繩21L、21R之有效長度的緊固繩 長度調整器具31。 上述的左、右侧緊固繩21L、21R係由具有彈性的橡膠 帶等所構成，且具有規定的長度、規定的厚度、規定的寬 度。 15 323070 201143851 並且，左侧緊固繩21L的一端（上端）係藉由熔接等安 裝在面罩主體部11的左端上侧外表面，另—端（下端）則藉 由溶接等安裝在面罩主體部11的左端下侧外表面。 另外，右侧緊固繩21R的一端（上端）係藉由熔接等安 裝在面罩主體部11的右端上側外表面，另一端（下端）則藉 由熔接等安裝在面罩主體部11的右端下側外表面。 其次，對佩戴面罩1A的一個例子進行說明。 首先，以覆蓋鼻以及口的方式佩戴面罩主體部11之 後，將位於面罩主體部丨丨左侧的左侧緊固繩21L掛在左侧 耳朵上，將右側緊固繩211^掛在右側耳朵上，從而如第6 圖所示’能夠將面罩1A作為耳掛形式來佩戴。 在如上方式佩戴面罩1A的狀態下，當左、右侧緊固繩 21L、21R的緊固力強或弱時，藉由拉伸左、右側緊固繩 21L、21R的對折部分使其變薄，並操作緊固繩長度調整器 具31使其相對於左、右侧緊固繩21L、21R移動，將左、 右側緊固繩21L、21R的環狀部分的長度、亦即有效長度調 整成所希望的長度，從而調整成所希望的緊固力。 第7圖是表示本發明的面罩之第三實施例的前視圖， 第8圖是表示第7圖所示的面罩之使用例的說明圖，對於 與第1圖至第6圖相同或相當的部分附註同一符號並省略 其說明。 第7圖及第8圖所示的面罩1B包括：形成為杯狀的面 罩主體部11 ;安裝在該面罩主體部U的緊固繩21 ;以及 安裝在該緊固繩21之用以調整緊固繩21的有效長度的緊 323070 16 201143851 固繩長度調整器具31。 上述的緊固繩21係由具有彈性的橡膠帶等所構成 具有規定的長度、規定的厚度、規定的寬度。 ，且 並且’緊gj繩21係以可上下移動之方式收容並安裝在 形成於面罩主體部11的左右端部的孔内，該孔係藉由沿著 上下^面罩主體部u的左右端部對折並熔接*形成者。 並且’在緊固繩21的兩端安裝有緊固繩長度調整器具 此外在第7圖中雖將緊固繩長度調整器具31配置在 面罩主體。P 11的下侧’但也可以將緊固繩長度調整器具 31配置在面罩主體部11的上侧。 ^ 以下對配帶面罩1B的一個例子進行說明。 =先^將頭部插入位於面罩主體部11下侧的緊固繩 21/的。卩刀，在以覆蓋鼻以及口的方式佩戴面罩主體部Η 之後使位於面罩主體部i (下側的緊固繩21的部分 頭部的後方下部。 然後’藉由將位於面罩主體部n上側的緊固繩2ι的 部分拉起並使其沿著頭部的後方上部，從而如第8圖所 不’能夠將面罩1B作為一根綁在頭上形式來佩戴。 在如上方式佩戴面罩⑺的狀態下，當緊固繩21的緊 固=強或弱時’藉由拉伸緊固繩21的端部使其變薄，並操 作，、固繩長度調整器具31使其相對於緊固繩Μ移動，將 緊=21的環狀部分的長度、亦即有效長度膽成所希望 的長又，從而調整成所希望的緊固力。 323070 17 201143851 第9圖是表示本發明的緊固繩長度調整器具之其他實 施例的圖，第9圖（a)是表示本發明的緊固繩長度調整器具 之第二實施例的俯視圖，第9圖（b)是表示本發明的緊固繩 長度調整器具之第三實施例的俯視圖，第9圖（c)是表示本 發明的緊固繩長度調整器具之第四實施例的俯視圖，對於 與第1圖至第8圖相同或相當的部分附註同一符號並省略 其說明。 第9圖（a)所示的緊固繩長度調整器具31A與第1圖所 示的緊固繩長度調整器具31不同之處在於，第一卡止狹縫 3 8 A和第二卡止狹縫4 4 A彼此往外側以凸狀（圓弧狀）突出 並朝縱方向延伸而相對向。 第9圖（b)所示的緊固繩長度調整器具31B與第1圖所 示的緊固繩長度調整器具31不同之處在於，第一卡止狹縫 38B和第二卡止狹縫44B彼此往内側以凹狀（圓弧狀）凹陷 並朝縱方向延伸而相對向。 第9圖（c)所示的緊固繩長度調整器具31C與第1圖所 示的緊固繩長度調整器具31不同之處在於，第一卡止狹縫 38C和第二卡止狹縫44C彼此以波形朝縱方向延伸而相對 向。 第9圖（a)至（c)所示之形狀的緊固繩長度調整器具 31A至31C也與第1圖所示的緊固繩長度調整器具31同樣 地，能夠調整緊固繩的長度，且能夠得到同樣的效果。 此外，第9圖（a)所示的緊固繩長度調整器具31A係在 拉伸緊固繩的情況下，緊固繩之寬度方向的端部會欲朝彼 18 323070 201143851 此分離的方向移動。 因此’緊固繩更加難以從第一、第二卡止狹縫38A、 44A脫離。 第圓是表示本發明的緊固繩長度調整器具之另一 實施例的圖，第1〇圖（a)是表示本發明的緊固繩長度調整 器具之第五實施例的俯視圖，第1〇圖化）是表示本發明的 緊固繩長度調整器具之第六實施例的俯視圖，第丨〇圖（c) 是表示本發明的緊固繩長度調整器具之第七實施例的俯視 圖’對於與第1圖至第9圖相同或相當的部分附註同一符 號並省略其說明。 第10圖（a)所示的緊固繩長度調整器具31D與第9圖 (a) 所示的緊固繩長度調整器具31A不同之處在於，外形為 圓形。 第10圖（b)所示的緊固繩長度調整器具31E與第9圖 (b) 所示的緊固繩長度調整器具31B不同之處在於，外形為 圓形。 第10圖（c)所示的緊固繩長度調整器具31F與第9圖 (c) 所示的緊固繩長度調整器具31C不同之處在於，外形為 圓形。 第10圖（a)至（c)所示之形狀的緊固繩長度調整器具 310至31F也與第1圖所示的緊固繩長度調整器具31同樣 地’能夠調整緊固繩的長度，且能夠得到同樣的效果。 此外，第10圖（a)所示的緊固繩長度調整器具311)係 在拉伸緊固繩的情況下，緊固繩之寬度方向的端部會欲朝 19 323070 201143851 彼此分離的方向移動。 因此，緊固繩更加難以從第一、第二卡止狹縫38A、 44A脫離。 第11圖是表示本發明的緊固繩長度調整器具之第八 實施例的俯視圖，且對於與第1圖至第10圖相同或相當的 部分附註同一符號並省略其說明。 第11圖所示的緊固繩長度調整器具31G係由主體部 32、與該主體部32 —體成形的鉤部53所構成。 上述的緊固繩長度調整器具31D係用以調整佩戴者佩 戴面罩時所使用之緊固繩的有效長度者，且由具有規定的 強度的塑料（樹脂）、例如聚丙烯形成為板狀。 並且，鉤部53係與導入孔33、第一、第二卡止狹縫 38、44同樣地朝縱方向延伸，並與第一、第二引導狹縫34、 36交叉。 該緊固繩長度調整器具31D係與緊固繩長度調整器具 31、31A至31C同樣地，能夠調整緊固繩的長度。 第12圖是表示本發明的面罩之第四實施例的前視圖， 第13圖是表示第12圖所示的面罩之使用例的說明圖，對 於與第1圖至第11圖相同或相當的部分附註同一符號並省 略其說明。 第12圖以及第13圖所示的面罩1C包括：形成為杯狀 的面罩主體部11 ;安裝在該面罩主體部11的左、右側緊 固繩21L、21R ;以及安裝在右側緊固繩21R之用以調整右 側緊固繩21R之有效長度的緊固繩長度調整器具31G。 20 323070 201143851 此外，緊固繩長度調整器具31G雖安裝在右側緊固纖 21R’但是也可以將緊固繩長度調整器具31G安裝在左侧緊 固繩21L，或者將緊固繩長度調整器具31(^安裝在左、右 侧緊固繩21L、21R。 接著’對佩戴面罩1C的一個例子進行說明。 首先’以覆蓋鼻及口的方式佩戴面罩主體部11之後， 藉由使左、右侧緊固繩21L、21R經由耳朵的上下並將鉤邹 53掛在左側緊固繩21L上，從而如第13圖所示，能夠將 面罩1C作為侧鉤形式來佩戴。 在如上方式佩戴面罩1C的狀態下，當左、右側緊固繩 21L、21R的緊固力強或弱時，藉由拉伸右侧緊固繩21 r的 對折部分使其變薄，並操作緊固繩長度調整器具3ig使其 相對於右側緊固繩21R移動，將右侧緊固繩21R的環狀部 分的長度、亦即有效長度調整成所希望的長度，從而調整 成所希望的緊固力。 第14圖是表示緊固繩長度調整器具之參考例的俯視 圖，對於與第1圖至第13圖相同或相當的部分附註同一符 號並省略其說明。 第14圖所示的緊固繩長度調整器具31H係用以調整佩 戴者佩戴面罩時所使用之緊固繩的有欵長产者 1 規定的強度的塑料（樹脂）、例如聚丙缔所^成且由具有 俯視時呈長方形（正方形）的板狀，且由甘 並形成為201143851 VI. TECHNOLOGICAL FIELD OF THE INVENTION [Technical Field] The present invention relates to a mask for preventing dust from being inhaled during operation in a place with a lot of dust, and for adjusting the length of the fastening rope for adjusting the effective length of a fixed rope such as a construction site. material. Tightening on the mask [Prior Art] As an example of the above-mentioned conventional mask, the rubber cord (fastening cord) on the hood is double-folded (folding technique: ★ (fastening the length of the rope), and Adjust the plug-in to the open, set 'to adjust the effective length of the rubber rope (for example, :::::: degree to fit, - the shape of the slot _ section and the two elastic plates clamp tight _, and adjust The position of the fastening cord sandwiched between the cut wall portion and the elastic plate, thereby adjusting the effective length of the fastening cord (for example, refer to Patent Document 2) 〇 + the fastening device on the mask is in the pair of elastic panels At the time of molding, by providing two U-shaped slits, it is possible to form a structure (shape) in which two elastic plates can be simultaneously formed. Therefore, it is possible to suppress the cost of parts. In addition, another example of the mask is proposed as follows. From the attachment slit provided at the length of the fastening rope (the length of the fastening rope to the connection slit): the belt (fastening rope) is placed from the dislocation (fastening rope length adjusting device) a Σ-shaped connecting slit on the upper side of the slit 4 323070 201143851 The slit is moved and the strip is cooled by the slit, and the effective length of the strip is adjusted by adjusting the position of the strip which is lost by the wearing slit (for example, refer to Patent Document 3) Since the jig on the mask is a structure (shape) that can be formed by providing the connection slit and the two wearing slits when forming the plate, it is possible to suppress the cost of the parts. Since the connection slit moves to the two wearing slits and is configured to sandwich (lock) the belt by the two wearing slits, it is easy to insert (mount) the belt to the jig. [PRIOR ART DOCUMENT] Patent Document 1: Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. 2005-218229. In the tube (fastening cord length adjusting device) of the mask described in Patent Document 1, it is difficult to insert a double-folded (folded) rubber cord into a hollow tube, which is very troublesome, and thus the manufacturing cost is increased. The fastening device for the mask described in Patent Document 2 (the fastening cord adjusting device) is not provided with a coupling groove for connecting the two slits. Therefore, 'after fastening the fastening cord to the mask body by welding or the like' The fastening tool cannot be attached to the fastening cord. The jig (fastening cord length adjustment tool) of the mask described in the above-mentioned Patent Document 3 is provided with a connection slit that connects the two wearing slits. 5 323070 201143851 Therefore, The jig can also be mounted on the belt after the belt is attached to the mask main body by welding or the like. However, since the wearing slit of the jig in Patent Document 3 and the width of the connecting slit toward the mounted strip are attached. Since the directions are connected in a straight line, if the belt is stretched in order to adjust the effective length of the belt, the belt is detached from the wearing slit to the joint slit due to the direction in which the belt is stretched. Further, in the jig of Patent Document 3, since the two connection slits extend from the both ends of the connection slit to each other, if the tape is stretched in order to adjust the effective length of the tape, the tape is oriented. The direction in which the interval is narrowed is close, whereby there is a possibility that the ribbon is detached from the wearing slit to the connecting slit. Therefore, in the case where the effective length of the strip is adjusted during the use of the mask, there is a possibility that the mask falls off from the face. The present invention has been made in order to solve the above-mentioned deficiencies, and provides a fastening cord that can be attached even after the fastening cord is attached to the mask body, and the fastening cord does not lock when the effective length of the fastening cord is adjusted. A fastening cord length adjusting device for the mask from which the slit is detached, and a mask using the fastening cord length adjusting device. (Means for Solving the Problem) The fastening cord length adjusting device of the face mask of the present invention includes a plate-shaped main body portion, and the main body portion is provided with a predetermined width, a predetermined thickness, and an elastically deformable introduction. An introduction hole of the fastening cord; a first guiding slit that communicates with the introduction hole in the right end, and guides the fastening cord in the introduction hole toward the first locking slit in a lateral direction; the left end and the above 6 323070 201143851 a second guide slit extending in a lateral direction in which the lead-in hole in the lead-in hole is guided to the second locking slit; the intermediate portion in the longitudinal direction and the first guide slit The left end is continuous, and the first locking slit extending in the longitudinal direction of the fastening cord from the first guiding slit is locked; and the intermediate portion in the longitudinal direction is in communication with the right end of the second guiding slit, and The second locking slit extending in the longitudinal direction of the fastening cord from the second guiding slit is locked. Further, the face mask of the present invention is characterized in that the fastening cord length adjusting device of the above-described mask is used. (Effect of the Invention) According to the fastening cord length adjusting device of the face mask of the present invention, since the introduction hole and the first and second locking slits are communicated by the first and second guiding slits, even if the fastening rope is to be fastened After the mask body is attached, the fastening cord length adjusting device of the mask can also be attached to the fastening cord. Further, the first locking slit intersects the first guiding slit, and the first guiding slit communicates with the intermediate portion of the longitudinal direction of the first locking slit, and the second locking slit intersects with the second guiding slit And the second guiding slit communicates with the longitudinal intermediate portion of the second locking slit. Therefore, when the effective length of the fastening cord is adjusted, even if the fastening cord is stretched, the wall portions forming the first locking slit and the second locking slit prevent the fastening cord from approaching in the direction in which the interval is narrowed. Therefore, the fastening cord is not detached from the first and second locking slits. [Embodiment] Hereinafter, embodiments of the invention will be described with reference to the drawings. 7 323070 201143851 Fig. 1 is a view showing a first embodiment of a fastening cord length adjusting device (hereinafter simply referred to as "fastening cord length adjusting device") of the face mask of the present invention. The length 5 of the fastening cord is an appliance that adjusts the effective length of the fastening cord used when the wearer wears the mask, and is formed into a horizontally long rectangular shape in plan view by using a plastic (resin) having a predetermined strength, for example, polypropylene. The plate shape is composed of a body portion 32 whose corners are rounded. Further, the fastening cord length adjusting device 31 may be not only a rectangular shape but also an oblong shape or a circular shape. The main body portion 32 is provided with an introduction hole 33, a first guiding slit 34, a first guiding slit 36, a first locking slit 38, a second locking slit 44, and the like. The introduction hole 33 can be inserted in the vertical direction (the same as the vertical direction in the first drawing (a)) in the vertical direction (the horizontal direction in the left-right direction in Fig. 1(a)). Set the length and width of the fastening rope (folded). The first guide slit 34 described above is oriented in the lateral direction so as to communicate with the left middle portion of the introduction hole 33 in the longitudinal direction, for example, the left central portion (the left and right directions in Fig. 1(a), the same applies hereinafter) It is provided on the left side of the main body portion 32. The second guide slit 36 is provided on the right side of the main body portion 32 in the lateral direction so that the left end communicates with the right middle portion of the introduction hole 33 in the longitudinal direction, for example, the right central portion. Therefore, the first guiding slit 34 and the second guiding slit 36 are located on the same straight line extending in the lateral direction. Further, at the right end portion of the first guide slit 34, that is, the connection portion with the introduction hole 8 323070 201143851 33, an arc-shaped first guide portion 35 is provided for easy introduction of the fastening cord. Similarly, the second guide portion 37 having an arc shape is provided in the left end portion of the second guide slit 36, that is, the connection portion with the guide hole 33, in order to facilitate the introduction of the fastening cord. The widths of the first guiding slits 34 and the second guiding slits 36 (the vertical direction in the first drawing (a)) are the following intervals: When the elastically deformable fastening cord is stretched, the thickness is made In the thinned state, the fastening cord can be moved (passed). If the fastening cord is released and the thickness is thickened, the fastening cord cannot be moved (passed). Further, since the fastening cord length adjusting tool 31 itself has elasticity, a slight deformation of the fastening cord length adjusting device 31 serves to easily move the fastening cord. The first locking slit 38 is provided on the left side of the main body portion 32 in the longitudinal direction so that the left end of the first guiding slit 34 communicates with the right middle portion in the longitudinal direction, for example, the right central portion. The second locking slit 44 is provided on the right side of the main body portion 32 in the longitudinal direction so that the right end of the second guiding slit 36 communicates with the left intermediate portion in the longitudinal direction, for example, the left central portion. Therefore, the first locking slit 38 and the second locking slit 44 extend in the longitudinal direction in parallel. In the main body portion 32, the first locking slit 38 is provided, and the thickness direction of the wall portion of the first locking slit 38 (the vertical direction in the first drawing ((:)) is formed. The locking edge 39. 9 323070 201143851 Similarly, by providing the second locking slit 44 in the main body portion 32, the end portion in the thickness direction of the wall portion forming the second locking slit 44 constitutes the locking edge 45. Further, at the both ends of the first locking slit 38, that is, the upper and lower ends of the first locking slit 38, end receiving holes 40, 42 for accommodating the end portions of the fastening cord in the width direction are provided. The receiving holes 40 and 42 are formed to have a larger diameter than the width of the first locking slit 38 (the horizontal direction in FIG. 1( a )), for example, about 1 to 3 of the width of the first locking slit 38 . Similarly, the end of the second locking slit 44, that is, the upper end of the second locking slit 44, is provided with an end receiving hole for accommodating the end portion of the fastening cord in the width direction. 46, 48. The end receiving holes 46, 48 are formed to have a larger diameter than the width of the second locking slit 44 (the horizontal direction in Fig. 1(a)), for example, the second A hole having a diameter of about 1 to 3 times the width of the slit 44. Thus, by providing the end receiving holes 4, 42 at both ends of the first locking slit 38, the first locking narrow is formed. The intersecting portions of the wall portion of the slit 38 and the wall portion forming the end receiving holes 40, 42 constitute the resistance edges 41, 43. Similarly, the end receiving holes 46 are provided at both ends of the second locking slit 44. 48, the wall portion forming the second locking slit 44 and the intersection portion of the wall portion forming the end receiving holes 46, 48 constitute the resistance edges 47, 49. The above-mentioned third slit 38 and the second locking slit The width of the slit 44 (the horizontal direction in the first drawing (a)) is such that the elastic cord can be elastically deformed and the thickness is reduced. 201143851 Moving 'If the tensioning rope is released and the thickness is thickened, the fastening rope cannot be moved. '' In addition, the end-side receiving hole 4〇_ portion from the - square (upper side) passes the first locking narrow The slit 38 is up to the length L of the end of the other end (lower) end receiving hole, and the end material hole 46 from the side (upper side) The end portion is narrowed by the second locking, and the length L of the end portion of the slit receiving portion 44 until the other (lower) end receiving hole 48 is the same as the width of the fastening cord or, in addition, the main (four) 32 is used to reduce shrinkage during molding. Reinforcing and reducing the forming material 'by providing a circumferential (annular) thin wall portion on both main surfaces, an annular outer peripheral reinforcing rib 50 is provided at the periphery of the two main surfaces, and an introduction hole surrounding the two main surfaces is provided 33. The first and second guiding slits 34 36, the first and second locking slits 38 and 44, and the annular inner circumferential reinforcing ribs 51 of the end receiving holes, ^, 46, 48. An embodiment of the face mask of the present invention to which the above-described fastening cord length adjusting device 31 is applied (utilized and used) will be described. FIG. 2 is a view showing a first embodiment of the mask of the present invention, FIG. 3 is an explanatory view showing a use example of the mask shown in FIG. 2, and FIG. 4 is a view showing a tight-to-wire-to-tightness adjustment. In the description of the mounting example of the H-type, the same or equivalent parts as in the drawings are denoted by the same reference numerals, and the description thereof is omitted. Further, in the following description of the mask, the upper and lower sides and the left and right sides are up and down and left and right as seen from the wearer of the mask. The mask i shown in Fig. 2 and Fig. 3 includes a mask main body portion 11 formed in a cup shape, and 323070 11 201143851 cords 21U, 21D attached to the upper and lower sides of the mask main body portion n; The upper and lower side fastening cords are provided with a fastening length adjusting tool 31 for adjusting the effective lengths of the upper and lower fastening cords 21U and 21D. The mask main body portion 11 described above is constituted by, for example, a filter portion formed to cover a person's nose or mouth. The filter portion is composed of a front cover portion covering the front side, and an outer circumference provided on the front cover portion and being connected to the outer circumference of the person's nose and mouth: a tactile cloth. Further, the front cover portion is, for example, formed in a multi-layered configuration and configured to be welded or bonded to the fastening cord. * The upper and lower fastening cords 2iu and 21D are made of a flexible rubber band or the like, and have a predetermined length, a predetermined thickness, and a predetermined width. Further, one end (left end) of the upper fastening cord 21U is attached to the upper outer surface of the left end of the mask main body portion 11 by welding or the like, and the other end (right end) is attached to the upper end of the right end of the mask main body portion u by welding or the like. surface. Further, one end (left end) of the lower fastening cord 21D is attached to the lower left outer surface of the mask main body portion 11 by welding or the like, and the other end (right end) is attached to the right end of the mask main body portion u by welding or the like. Side outer surface. Next, an example in which the fastening cord length adjusting tool 31 is attached to the upper and lower fastening cords 21U and 21D will be described with reference to Fig. 4 . First, as shown in Fig. 4(a), the double-folded (folded) upper fastening cord 21U is inserted into the introduction hole. Then, the one side of the upper side fastening cord 21U that is folded in half is made thinner than the thickness of 12 323070 201143851, and is moved from the first guiding slit 34 to the first locking slit 38 as shown in Fig. 4(b). When the both ends of the upper fastening cord 21U in the width direction are located in the end receiving holes 40 and 42, the force for stretching the upper fastening cord 21U is released. When the both ends of the upper fastening cord 21U in the width direction are located in the end receiving holes 40 and 42 and the force of stretching the upper fastening cord 21U is released, the upper fastening cord 21U is returned. In the original state, the upper fastening cord 21U is locked in the first locking slit 38, and the both end portions are in the end receiving holes 40, 42. Similarly, the other of the upper fastening cords 21U that are folded in half is stretched to make the thickness thin, and is locked in the second locking slits 44, and the both end portions are located in the end receiving holes 46, 48. Therefore, as shown in Fig. 4(c), the fastening cord length adjusting tool 31 can be attached to the upper fastening cord 21U. Then, the fastening cord length adjusting tool 31 is also attached to the lower fastening cord 21D in the same manner, so that the mask 1 shown in Fig. 2 can be obtained. As described above, according to the fastening cord length adjusting device 31 of the present invention, since the introduction hole 33 and the first and second locking slits 38, 44 are communicated by the first and second guiding slits 34, 36, Even after the upper and lower side fastening cords 21U and 21D are attached to the mask body 11, the fastening cord length adjusting tool 31 can be attached to the upper and lower fastening cords 21U and 21D. Further, in the case of the fastening cord length adjusting device 31, the first locking slit 38 and the first guiding slit 34 intersect, and the intermediate portion of the first guiding slit 34 and the longitudinal direction of the first locking slit 38 In communication, the second locking slit 44 and the second guiding slit 36 intersect, and the second guiding slit 36 communicates with the intermediate portion of the second card 13 323070 201143851 in the longitudinal direction of the slit 44. Therefore, when the effective lengths of the upper and lower fastening cords 21U, 21D are adjusted, even if the folded portions of the upper and lower fastening cords 21U, 21D are stretched, the first locking slit 38 and the second locking slit are formed. The wall portion of the slit 44 also prevents the upper and lower fastening cords 21U, 21D from approaching in a direction in which the interval is narrowed, so that the upper and lower fastening cords 21U, 21D do not pass from the first and second locking slits 38. 44 is detached from the first and second guiding slits 34, 36. Further, since the end receiving holes 40, 42 are provided at both ends of the first locking slit 38 to form the resistance edges 41, 43, and the end receiving holes 46 are provided at both ends of the second locking slit 44. 48, the resistance edges 47, 49 are formed, so that the ends of the upper and lower fastening cords 21U, 21D in the width direction can be prevented from moving toward the center by the resistance edges 41, 43, 47, 49, so that the upper and lower sides are tight. It is more difficult for the fixing cords 21U and 21D to be detached from the first and second locking slits 38 and 44 to the first and second guiding slits 34 and 36. Further, since the first guiding portion 35 is provided in the first guiding slit 34 and the second guiding portion 37 is provided in the second guiding slit 36, the upper and lower fastening ropes 21U, 21D can be easily performed. The movement from the introduction hole 33 to the first and second locking slits 38, 44. In addition, since the locking edge 39 is formed at the end of the first locking slit 38, and the locking edge 45 is formed at the end of the second locking slit 44, it can be blocked by the locking edges 39, 45. The lower fastening cords 21U and 21D are stretched in the longitudinal direction to increase the effective length, so that the effective lengths of the upper and lower fastening cords 21U and 21D are hard to change. An example of wearing the mask 1 will be described below. 14 323070 201143851 2 First, the mask main body portion u is worn with the lower side fastening the nose and the π on the lower side of the mask main body portion 11, and the lower fastening cord 21D is along the lower rear portion of the head. Then, by attaching the upper portion of the upper portion of the upper portion of the mask main body portion u to the rear upper portion of the cord, as shown in Fig. 3, the spectacles 1 can be worn as a pair of two cords attached to the head. When the fastening force of the upper and lower fastening cords 21U, 21D is strong or weak in the state in which the mask 1 is worn as described above, the upper and lower fastening cords are stretched, and the half-folded portion of the 21D is thinned. And operating the tightness length adjusting tool 31 to move relative to the upper and lower side fastening cords 21U, 21]), and adjusting the length of the annular portion of the upper and lower fastening cords 21U, 21D, that is, the effective length The desired length is adjusted to the desired fastening force. Fig. 5 is a front view showing a second embodiment of the mask of the present invention, and Fig. 6 is a view showing an example of use of the mask shown in Fig. 2, which is the same as or equivalent to the first to fourth figures. Some parts are denoted by the same reference numerals and their descriptions are omitted. The mask 1A shown in Fig. 5 and Fig. 6 includes a mask main body portion 1 formed in a cup shape, left and right fastening cords 21L, 21R attached to the mask main body portion 11, and mounted on the left and right sides. A fastening cord length adjusting tool 31 for adjusting the effective lengths of the left and right fastening cords 21L, 21R on the fastening cord 21L' 21R. The left and right fastening cords 21L and 21R described above are composed of a flexible rubber band or the like and have a predetermined length, a predetermined thickness, and a predetermined width. 15 323070 201143851 Further, one end (upper end) of the left fastening cord 21L is attached to the upper outer surface of the left end of the mask main body portion 11 by welding or the like, and the other end (lower end) is attached to the mask main body portion by welding or the like. The lower outer surface of the left end of the 11th. Further, one end (upper end) of the right fastening cord 21R is attached to the upper outer surface of the right end of the mask main body portion 11 by welding or the like, and the other end (lower end) is attached to the lower end of the right end of the mask main body portion 11 by welding or the like. The outer surface. Next, an example of wearing the mask 1A will be described. First, after the mask main body portion 11 is worn covering the nose and the mouth, the left fastening cord 21L located on the left side of the mask main body portion 挂 is hung on the left ear, and the right fastening cord 211 is hung on the right ear. Then, as shown in Fig. 6, the mask 1A can be worn as an ear hook. In a state where the mask 1A is worn as described above, when the fastening force of the left and right fastening cords 21L, 21R is strong or weak, the folded portions of the left and right fastening cords 21L, 21R are stretched to be thinned. And the fastening cord length adjusting tool 31 is moved to move relative to the left and right fastening cords 21L, 21R, and the length of the annular portion of the left and right fastening cords 21L, 21R, that is, the effective length is adjusted to The desired length is adjusted to the desired fastening force. Fig. 7 is a front view showing a third embodiment of the mask of the present invention, and Fig. 8 is an explanatory view showing an example of use of the mask shown in Fig. 7, which is the same as or equivalent to the first to sixth figures. Some parts are denoted by the same reference numerals and their descriptions are omitted. The mask 1B shown in Figs. 7 and 8 includes a mask main body portion 11 formed in a cup shape, a fastening cord 21 attached to the mask main body portion U, and a fastening cord 21 attached thereto for adjusting the tightness. The effective length of the reinforcing cord 21 is tight 323070 16 201143851 The cord length adjusting device 31. The fastening cord 21 described above is formed of a flexible rubber band or the like and has a predetermined length, a predetermined thickness, and a predetermined width. And the 'tight gj rope 21 is accommodated and attached to the hole formed in the left and right end portions of the mask main body portion 11 so as to be movable up and down by the left and right end portions of the upper and lower mask main body portions u Fold and weld *formers. Further, the fastening cord length adjusting device is attached to both ends of the fastening cord 21. Further, in Fig. 7, the fastening cord length adjusting tool 31 is disposed in the mask main body. The lower side of the P 11 'but the fastening cord length adjusting tool 31 may be disposed on the upper side of the mask main body portion 11. ^ An example of the wearing mask 1B will be described below. = First, the head is inserted into the fastening cord 21/ located on the lower side of the mask body portion 11. The scalpel is placed on the mask main body portion i (the lower portion of the head portion of the lower fastening cord 21 after the mask main body portion is covered with the nose and the mouth. Then, by being placed on the upper side of the mask main body portion n The portion of the fastening cord 2ι is pulled up and brought along the upper rear portion of the head so as to be able to wear the mask 1B as a piece on the head as shown in Fig. 8. The state of wearing the mask (7) in the above manner Next, when the fastening of the fastening cord 21 is strong or weak, 'by thinning the end of the fastening cord 21 and operating it, the cord length adjusting device 31 is made relative to the fastening cord. Moving, the length of the annular portion of tight = 21, that is, the effective length, is bisected to a desired length, thereby adjusting to the desired fastening force. 323070 17 201143851 Figure 9 is a view showing the length of the fastening cord of the present invention. Fig. 9(a) is a plan view showing a second embodiment of the fastening cord length adjusting device of the present invention, and Fig. 9(b) is a perspective view showing the fastening cord length adjustment of the present invention. A top view of a third embodiment of the appliance, and Figure 9(c) is a view In the plan view of the fourth embodiment of the fastening cord length adjusting device of the present invention, the same or corresponding portions as those in the first to eighth embodiments are denoted by the same reference numerals, and the description thereof will be omitted. The fastening shown in Fig. 9(a) The rope length adjusting tool 31A is different from the fastening cord length adjusting tool 31 shown in Fig. 1 in that the first locking slit 38 A and the second locking slit 4 4 A are convex outwardly from each other ( The arc-shaped portion protrudes and extends in the longitudinal direction and faces each other. The fastening cord length adjusting device 31B shown in Fig. 9(b) is different from the fastening cord length adjusting device 31 shown in Fig. 1 in that The one locking slit 38B and the second locking slit 44B are recessed in a concave shape (arc shape) toward the inner side and extend in the longitudinal direction to face each other. The fastening cord length adjusting device shown in Fig. 9(c) The 31C is different from the fastening cord length adjusting tool 31 shown in Fig. 1 in that the first locking slit 38C and the second locking slit 44C are opposed to each other with a wave shape extending in the longitudinal direction. The fastening cord length adjusting instruments 31A to 31C having the shapes shown in a) to (c) are also the length of the fastening cord shown in Fig. 1 In the same manner, the length of the fastening cord can be adjusted in the same manner, and the same effect can be obtained. Further, in the case where the fastening cord length adjusting tool 31A shown in Fig. 9(a) is stretched, The end portion of the fastening cord in the width direction is intended to move in the direction in which it separates from 18 323070 201143851. Therefore, it is more difficult for the fastening cord to be detached from the first and second locking slits 38A, 44A. The fifth circle indicates the present invention. FIG. 1(a) is a plan view showing a fifth embodiment of the fastening cord length adjusting device of the present invention, and FIG. 1 is a view showing the present embodiment of the fastening cord length adjusting device. A plan view of a sixth embodiment of the fastening cord length adjusting device of the present invention, and (c) is a plan view showing a seventh embodiment of the fastening cord length adjusting device of the present invention for the first to the ninth to the ninth The same or equivalent portions of the drawings are denoted by the same reference numerals and their description is omitted. The fastening cord length adjusting tool 31D shown in Fig. 10(a) is different from the fastening cord length adjusting tool 31A shown in Fig. 9(a) in that the outer shape is circular. The fastening cord length adjusting tool 31E shown in Fig. 10(b) is different from the fastening cord length adjusting tool 31B shown in Fig. 9(b) in that the outer shape is circular. The fastening cord length adjusting tool 31F shown in Fig. 10(c) is different from the fastening cord length adjusting tool 31C shown in Fig. 9(c) in that the outer shape is circular. Similarly to the fastening cord length adjusting tool 31 shown in Fig. 1, the fastening cord length adjusting tools 310 to 31F of the shape shown in Fig. 10 (a) to (c) can adjust the length of the fastening cord. And the same effect can be obtained. Further, in the case where the fastening cord length adjusting tool 311) shown in Fig. 10(a) is a tension fastening cord, the end portions in the width direction of the fastening cord are to be moved away from each other in the direction of 19 323070 201143851. . Therefore, it is more difficult for the fastening cord to be detached from the first and second locking slits 38A, 44A. Fig. 11 is a plan view showing an eighth embodiment of the fastening cord length adjusting device of the present invention, and the same or corresponding portions as those of Figs. 1 to 10 are denoted by the same reference numerals, and the description thereof will be omitted. The fastening cord length adjusting tool 31G shown in Fig. 11 is composed of a main body portion 32 and a hook portion 53 integrally formed with the main body portion 32. The above-described fastening cord length adjusting device 31D is for adjusting the effective length of the fastening cord used when the wearer wears the mask, and is formed into a plate shape by a plastic (resin) having a predetermined strength, for example, polypropylene. Further, the hook portion 53 extends in the longitudinal direction in the same manner as the introduction hole 33 and the first and second locking slits 38 and 44, and intersects the first and second guiding slits 34 and 36. The fastening cord length adjusting device 31D can adjust the length of the fastening cord in the same manner as the fastening cord length adjusting devices 31 and 31A to 31C. Fig. 12 is a front view showing a fourth embodiment of the mask of the present invention, and Fig. 13 is an explanatory view showing an example of use of the mask shown in Fig. 12, which is the same as or equivalent to those of Figs. 1 to 11. Some parts are denoted by the same reference numerals and their descriptions are omitted. The mask 1C shown in Fig. 12 and Fig. 13 includes a mask main body portion 11 formed in a cup shape, left and right fastening cords 21L, 21R attached to the mask main body portion 11, and a right fastening cord 21R attached thereto. The fastening cord length adjusting device 31G for adjusting the effective length of the right fastening cord 21R. 20 323070 201143851 Further, although the fastening cord length adjusting tool 31G is attached to the right fastening fiber 21R', the fastening cord length adjusting tool 31G may be attached to the left fastening cord 21L, or the fastening cord length adjusting tool 31 may be attached. (^ Attached to the left and right fastening cords 21L, 21R. Next, an example of wearing the mask 1C will be described. First, after the mask main body portion 11 is worn covering the nose and the mouth, by making the left and right sides The fastening cords 21L, 21R are hung on the left fastening cord 21L via the upper and lower sides of the ear, so that the mask 1C can be worn as a side hook as shown in Fig. 13. The mask 1C is worn as described above. In the state, when the fastening force of the left and right fastening cords 21L, 21R is strong or weak, it is thinned by stretching the folded portion of the right fastening cord 21 r, and the fastening cord length adjusting device 3ig is operated. The length of the annular portion of the right fastening cord 21R, that is, the effective length is adjusted to a desired length, and is adjusted to a desired fastening force with respect to the right fastening cord 21R. Indicates the reference of the fastening rope length adjustment device In the plan view of the first embodiment, the same reference numerals will be given to the same or corresponding parts as those in the first to the third embodiment, and the description thereof will be omitted. The fastening cord length adjusting device 31H shown in Fig. 14 is used to adjust the wearer's wearing mask. The plastic cord (resin) of the fastening cord 1 having a predetermined strength, for example, a polypropylene material, and having a rectangular shape (square shape) in plan view, and formed by
四角的角為圓H 的主體部32B所構成。 並且，在主體部32B上設有：第—、笛 *二弓丨導狹缝34、 323070 21 201143851 36 ’第、第二導引部35、37 ;第一、第二卡止狹縫38、 44 ’卡止邊緣39、45 ;端部收容孔40、42、46、48 ;阻力 邊緣41、43、47、49 ;以及外周、内周補強肋5〇、51。 此外’第一、第二引導狹缝34、36係彼此朝相反方向 敞開。 該緊固繩長度調整器具31G係令用來佩戴面罩的張力 作用於緊固繩上，俾從第一、第二引導狹縫34、36脫離， 因此，若欲拉伸對折的緊固繩的部分來調整緊固繩的有效 長度，則緊固繩有可能經由第一、第二引導狹縫 從第一、第二卡止狹縫38、44脫離。 在上述的實施例中，雖表示將主體部32的外形做成為 長方形、圓形的例子，但主體部也可以是其他形狀、例如 橢圓形等。 另外，亦可為在面罩主體部11設有閥的面罩。 【圖式簡單說明】 第1圖是表示本發明之面罩的緊固繩長度調整器具的 第一實施例之圖，第1圖（a)是俯視圖，第i圖化）是第i 圖（a)的B-B線的剖視圖，第丄圖化）是第1圖（&)的c_c 線的局部剖視圖。 第2圖是表示本發明之面罩的第一實施例之前視圖。 第3圖是表示第2圖所示之面罩的使用例的說明圖。 第4圖（a)至（c)是表示緊固繩安裝到緊固繩長度調整 器具之安裝例的說明圖》 第5圖是表示本發明之面罩的第二實施例的前視圖。 22 323070 201143851 第6圖是表示第5圖所示的面罩之使用例的說明圖。 第7圖是表示本發明之面罩的第三實施例的前視圖。 第8圖是表不第7圖所示的面罩之使用例的說明圖。 第9圖疋表示本發明之面罩的緊固繩長度調整器具之 其他實施例的圖，第9圖（8)是表示本發明之面罩的緊固繩 長度調整器具的第二實施例之俯視圖，第9 是表示本 發明的面罩的緊固繩長度調整器具之第三實施例的俯視 圖’第9圖（c)是表示本發明之面罩的緊固繩長度調整器具 之第四實施例的俯視圖。 第10圖疋表示本發明的面罩之緊固繩長度調整器具 的另一實施例的圖，第10圖（a)是表示本發明之面罩的緊 固繩長度調整器具之第五實施例的俯視圖，第10圖…）是 表示本發明之面罩的緊固繩長度調整器具之第六實施例的 俯視圖’帛10目⑹是表示本發明之面罩的緊固繩長度調 整器具之第七實施例的俯視圖。 第11圖疋表示本發明之面罩的緊固繩長度調整器具 之第八實施例的俯視圖。 第12圖是表示本發明之面罩的第四實施例的前視圖。 第13圖疋表不第12圖所示的面罩之使用例的說明圖。 第14圖是面罩的緊固繩長度調整器具之參考例的俯 視圖。 【主要元件符號說明】 面罩主體部 下侧緊固繩 1、1A、IB、1C 面罩 21 緊固繩 23 323070 201143851 21L 左側緊固繩 21R 右側緊固繩 21U 上侧緊固繩 3 卜 31A、31B、31C、31D、31E、31F、31G、31H 緊固繩 長度調整器具 32、32A、32B 主體部 33 導入孔 34 第一引導狹縫 35 第一導引部 36 第二引導狹縫 37 第二導引部 38、 38A、38B、38C 第一卡止狹縫 39、 45 卡止邊緣 40、42、46、48 端部收容孔 41、43、47、49 阻力邊緣 44、44A、44B、44C 第二卡止狹縫 50 外周補強肋 51 内周補強肋 53 鉤部 24 323070The corners of the four corners are constituted by the main body portion 32B of the circle H. Further, the main body portion 32B is provided with: a first, a second bow guide slit 34, a 323070 21 201143851 36 'the second guide portion 35, 37; the first and second locking slits 38, 44 'locking edges 39, 45; end receiving holes 40, 42, 46, 48; resistance edges 41, 43, 47, 49; and outer and inner circumferential reinforcing ribs 5, 51. Further, the first and second guiding slits 34, 36 are open to each other in opposite directions. The fastening cord length adjusting device 31G causes the tension for wearing the mask to act on the fastening cord, and the chin is detached from the first and second guiding slits 34, 36, so that if the folding rope is to be stretched Partially adjusting the effective length of the fastening cord, the fastening cord may be detached from the first and second locking slits 38, 44 via the first and second guiding slits. In the above-described embodiment, the outer shape of the main body portion 32 is an example of a rectangular shape or a circular shape. However, the main body portion may have another shape such as an elliptical shape. Further, a mask in which a valve is provided in the mask main body portion 11 may be used. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a first embodiment of a fastening cord length adjusting device for a mask of the present invention, and Fig. 1(a) is a plan view, i-th) is an i-th diagram (a) A cross-sectional view of the BB line, which is a cross-sectional view, is a partial cross-sectional view of the c_c line of the first figure (&). Fig. 2 is a front view showing a first embodiment of the face mask of the present invention. Fig. 3 is an explanatory view showing an example of use of the mask shown in Fig. 2. 4(a) to 4(c) are explanatory views showing an example of attachment of a fastening cord to a fastening cord length adjusting device. Fig. 5 is a front view showing a second embodiment of the mask of the present invention. 22 323070 201143851 Fig. 6 is an explanatory view showing an example of use of the mask shown in Fig. 5. Figure 7 is a front elevational view showing a third embodiment of the face mask of the present invention. Fig. 8 is an explanatory view showing an example of use of the mask shown in Fig. 7. Fig. 9 is a view showing another embodiment of the fastening cord length adjusting device of the mask of the present invention, and Fig. 9 (8) is a plan view showing a second embodiment of the fastening cord length adjusting device of the mask of the present invention. 9 is a plan view showing a third embodiment of the fastening cord length adjusting device of the mask of the present invention. FIG. 9(c) is a plan view showing a fourth embodiment of the fastening cord length adjusting device of the mask of the present invention. Fig. 10 is a view showing another embodiment of the fastening cord length adjusting device of the mask of the present invention, and Fig. 10(a) is a plan view showing a fifth embodiment of the fastening cord length adjusting device of the mask of the present invention. Fig. 10 is a plan view showing a sixth embodiment of the fastening cord length adjusting device of the mask of the present invention. Fig. 10(6) is a seventh embodiment of the fastening cord length adjusting device of the mask of the present invention. Top view. Fig. 11 is a plan view showing an eighth embodiment of the fastening cord length adjusting device of the mask of the present invention. Figure 12 is a front elevational view showing a fourth embodiment of the face mask of the present invention. Fig. 13 is an explanatory view showing an example of use of the mask shown in Fig. 12. Fig. 14 is a plan view showing a reference example of the fastening cord length adjusting device of the mask. [Description of main component symbols] Mask body lower part fastening rope 1, 1A, IB, 1C Mask 21 fastening cord 23 323070 201143851 21L Left fastening rope 21R Right fastening rope 21U Upper fastening rope 3 31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H fastening cord length adjusting device 32, 32A, 32B main body portion 33 introduction hole 34 first guiding slit 35 first guiding portion 36 second guiding slit 37 second guiding Portion 38, 38A, 38B, 38C First locking slit 39, 45 locking edge 40, 42, 46, 48 end receiving hole 41, 43, 47, 49 resistance edge 44, 44A, 44B, 44C second card Stop slit 50 outer peripheral reinforcing rib 51 inner peripheral reinforcing rib 53 hook portion 24 323070