1266019 (1) 玖、發明說明 【發明所屬之技術領域】 本發明是關於將滅火用的灑水龍頭安裝於配管用之接 頭與灑水龍頭的構造。 【先前技術】1266019 (1) Technical Field of the Invention The present invention relates to a structure in which a sprinkler for fire extinguishing is attached to a joint for a pipe and a sprinkler. [Prior Art]
一般，灑水龍頭是經由接頭安裝於落管，該落管是連 接在敷設於天花板內的橫配管，且被放下到天花板面附近 者。 在此，以往，爲了將該灑水龍頭連結於接頭，而藉由 將設在灑水龍頭的安裝部之外周的公螺紋螺合於設在接頭 的內周之母螺紋來進行，此時，在將水導入至配管內時不 會漏水地，預先在此螺合部捲繞密封帶，或塗佈密封劑。Typically, the sprinkler is attached to the drop tube via a joint that is attached to a transverse tube that is placed in the ceiling and that is lowered to the vicinity of the ceiling. Here, conventionally, in order to connect the sprinkler to the joint, the male screw provided on the outer circumference of the attachment portion of the sprinkler is screwed to the female screw provided on the inner circumference of the joint, and at this time, When water is introduced into the pipe, water is not leaked, and the sealing tape is wound around the screwing portion in advance or a sealant is applied.
又，作爲不藉由如此螺合之以往者，具有下述者：將 在內周面設置具有卡止片的卡止環之袋型螺帽預先安裝於 接頭的下端，以將在外周面設有可與前述卡止片相互卡止 的卡止槽之灑水龍頭插入於前述袋型螺帽，藉由上述卡止 片與上述卡止槽的相互卡止，來將灑水龍頭不會脫落地安 裝於接頭。（例如，參照專利文獻1 )。 且，作爲其他的以往者，具有下述者：在接頭的周 壁，朝其內側出沒地設置球體，並且在該接頭的外側設置 以彈簧彈推驅動前述球體用的滑動筒，藉由在灑水龍頭， 於前外周面設置可與前述球體嵌合之環狀槽，來在將灑水 龍頭插入於前述接頭內之狀態下使滑動筒移動，將球體壓 -4- (2) 1266019 出’藉將該球體嵌合於環狀槽，將灑水龍頭連結於接頭者 (例如，參照專利文獻2 )。 再者，不使用螺絲，而藉由卡合來安裝灑水龍頭者， 爲了防止漏水，而在灑水龍頭與接頭之間另外設置圓形環 等之密封構件。 〔專利文獻1〕 日本發明專利第2907950號公報（第2-3頁、第1 圖） 〔專利文獻2〕 日本新型專利第2559280號公報（第2_3頁、第1 圖） 【發明內容】 〔發明所欲解決之課題〕 在上述以往的灑水龍頭之安裝中，藉由公螺紋與母螺 紋之螺合者是爲了防止漏水，而必須預先在該螺合部分捲 繞密封帶、或塗佈密封劑，使得作業繁雜，形成施行作業 效率降低之原因。 又，在使用上述密封帶的情況，當對於螺紋面的捲繞 遲緩時，則在旋入之際，密封帶不會與公螺紋一同迴旋， 使得對於母螺紋之咬合不完全，會有產生漏水之虞，又， 當爲了防止此問題，而強力地捲繞時，則會有薄型且具有 柔軟性的密封帶斷裂，必須重新進行作業之問題點發生。 -5- (3) 1266019 又，在使用密封劑的情況，一般，因該密封劑是具有 稍許黏度之液體狀者，且具有接著性，隨著時間變化而固 態化者，所以當過量地塗佈於螺旋面時，在安裝灑水龍頭 之際，會有其一部分流入至配管內之虞，當密封劑進入到 配管內時，灑水龍頭的止水閥受到具有接著性的密封劑所 固定，在發生火災之際，會產有生妨礙其作動之重大問題 點之虞。又，與此相反地，當密封劑的塗佈量少時，則無 法獲得充分的密封性，會有產生漏水之虞。 且，將灑水龍頭安裝於配管之安裝作業也必須在梯凳 或立足處以朝上的姿勢來進行，使得作業者的負擔大，且 效率也差。又，在該作業，爲了防止漏水而必須將灑水龍 頭確實地旋入於配管，但當以所需以上的強大力量旋緊時 時，則會有密封帶斷裂，或螺紋磨損，產生漏水之虞，相 反地，當繫緊力量弱時，則會無法獲得密封帶的充分之密 封性，在此情況也會有產生漏水之虞，對於該作業需要熟 練度。 又，因此螺紋部分是形成錐形狀，所以在灑水龍頭與 配管側之間，沒有軸方向之抵接部分，因此安裝時之出入 尺寸測量困難，並且在安裝之際，會有上述的繫緊轉矩之 限制，因不會參差不齊地將多數個灑水龍頭安裝於天花 板，即使爲熟練者也不易進行該作業，且需要長時間來進 行之問題點產生。 又’不藉由如此的螺合，而僅以插入來安裝者，雖安 裝容易且可提升施行作業性，但需要在內周面設置具有卡 -6 - (4) 1266019 止片的卡止環之特殊形狀的袋型螺帽，或將接頭加工成球 體朝其內側出沒’並且在其外側需要設置以彈簧彈推推動 該球體的滑動筒，會有使得其構造變得複雜，製造成本變 高之問題產生。又，因此卡止片或球體僅有防止灑水龍頭 脫落之功能，不具有密封性，所以爲了防止漏水，必須另 外設置圓形環等的密封構件，並且爲了確實地防止漏水， 而必須提局其組裝精度，這會引起使得灑水龍透的插設作 業變得困難，在插設時使得圓形環受到損傷之虞等的新問 題產生。 又’以卡止片與卡止槽之相互卡止進行安裝之灑水龍 頭是因一旦被安裝於接頭時，則不易取下，即使可取下， 也會造成卡止片損傷，無法再利用，所以其結果，會有必 須更換整個接頭，不僅維修性差，並且增加修補時間或費 用之問題點產生。 本發明是以解決上述以往的灑水龍頭之安裝構造所具 有的問題點爲課題。 〔用以解決課題之手段〕 爲了解決上述課題，本發明之申請專利範圍第1項的 發明是針對藉由將設在灑水龍頭的安裝部之外周的公螺紋 螺合於設在接頭的內周之母螺紋，經由該接頭將灑水龍頭 連結於落管之灑水龍頭的安裝構造，其特徵爲：在上述接 頭與灑水龍頭的安裝部之間設有接觸兩者來保持水密用之 密封構件，並且在接頭的內周設置可擴大直徑之鎖定環’ (5) 1266019 且在灑水龍頭的安裝部之外周設置供該鎖定環嵌合之階差 部’在灑水龍頭之旋入終端位置，藉由將上述鎖定環嵌入 於階差部，使得灑水龍頭不會鬆弛地連結於接頭。 申請專利範圍第2項的發明是就申請專利範圍第1項 之發明，其中在灑水龍頭的安裝部的階差部之上方設置傾 斜導引面，在將灑水龍頭旋入接頭之際，傾斜導引面與設 在接頭的鎖定環滑接，將該鎖定環擴大直徑而導引至階差 部。 申請專利範圍第3項的發明是針對藉由將設在灑水龍 頭的安裝部之外周的公螺紋螺合於設在接頭的內周之母螺 紋，經由該接頭將灑水龍頭連結於落管之灑水龍頭的安裝 構造，其特徵爲：在上述接頭與灑水龍頭的安裝部之間設 有接觸兩者來保持水密用之密封構件，並且在灑水龍頭的 安裝部之外周設置可縮小直徑之鎖定環，且在接頭的內周 設置供該鎖定環嵌合之階差部，在灑水龍頭之旋入終端位 置，藉由將上述鎖定環嵌入於階差部，使得灑水龍頭不會 鬆弛地連結於接頭。 申請專利範圍第4項的發明是就申請專利範圍第3項 之發明，其中在接頭的階差部之下方設置傾斜導引面，在 將灑水龍頭旋入接頭之際’傾斜導引面與設在灑水龍頭的 鎖定環滑接，將該鎖定環縮小直徑而導引至階差部。 【實施方式】 以下，根據圖示之實施形態詳細地說明本發明。 -8- (6) 1266019 第1圖是顯示本發明的灑水龍頭的安裝構造之局部剖 面側面圖，第2圖是該部分擴大圖。在圖中，符號10爲 在內周設有母螺紋1 1之大致呈筒狀的接頭，該接頭1 0是 與以往者同樣地，連接於連結在敷設於天花板內的橫配管 (未圖示）而放下至天花版面附近之落管（未圖示）。 又，灑水龍頭S也是與以往者同樣地，在設於中程之 六角螺栓狀之板手的卡合部2之上側，設有在外周形成有 公螺紋5之安裝部1，在卡合部2下側的本體3內，內裝 有受到火災時的熱而分解且開放滅火用水的噴出口（未圖 示）之感熱破壞機構（未圖示）。 再者，在第1圖，符號4爲設在該本體3的下側，用 於本體3吸收火災熱等進行熱感應分解所須之集熱板。 在此，在本發明的安裝構造，在接頭10之設有母螺 紋1 1的下側的內側設有凹槽1 3，將鎖定環20嵌入該凹 槽。 該鎖定環20是如第4圖所示，在一部分切削後之平 面視角大致呈C字形者，可某種程度擴大直徑地，以彈簧 鋼形成。再者，該鎖定環2 0的內徑是設定成較灑水龍頭 S的安裝部1之外徑稍小。因此，在嵌入於凹槽1 3之狀 態下，如第3圖所示，其內端側保持於由接頭1 〇的內周 面朝稍微內側突出之狀態。 又，在該接頭1 〇的母螺紋1 1之上側內周，設有卡合 槽1 2，將成爲密封構件之圓形環3 0嵌合於該卡合槽。 一方面，灑水龍頭S是設有公螺紋5之安裝部1的下 -9 - (7) 1266019 端側擴大直徑’在此處設有供鎖定環2 0嵌入之階差部 7。因此’該階差部7是在將灑水龍頭S旋入安裝於接頭 之際’在該旋入終端位置，形成與設在接頭10之凹槽 1 3相對向。 其次’說明關於具有上述結構之接頭1 〇與灑水龍頭 S之安裝方法。首先，由安裝於未圖示的落管而設於天花 版面的接頭1 0之下方朝其內側插入灑水龍頭S的安裝部 1 ’藉由使灑水龍頭S旋轉，使設在安裝部丨的外周之公 螺紋5螺合於設在接頭1 〇的內周之母螺紋n，旋入灑水 龍頭S。此時，在螺紋的部分，因不存在有妨礙其旋轉的 密封帶或密封劑，且螺紋本身也未形成錐形狀，所以該作 業，即使不使用板手等的工具，也能夠容易地進行。 然後，當如此將灑水龍頭S逐漸旋入至接頭1 0時， 最終設在公螺紋5的下側之傾斜導引面6會與保持於接頭 10的凹槽1 3之鎖定環2 0接觸，伴隨至著灑水龍頭S的 旋入，具有彈性的鎖定環20會與傾斜導引面6滑接而擴 大直徑，被壓入至凹槽13內。 當由此狀態進一步旋入灑水龍頭S時，則最終設在安 裝部1的下端外周之階差部7形成與凹槽13相對之位 置，在此被按壓擴大成位於凹槽13內之鎖定環20是藉由 本身的彈性復原力，返回至原來的狀態，其內端嵌入至該 階差部7內。因此’被旋入的灑水龍頭S伴隨著按壓感在 此位置停止，阻止進一步的旋入。此時，安裝部1的上側 是插入於保持在接頭10的卡合槽12之圓形環30的內 -10- 1266019 (8) 側’以該圓形環3 0將接頭1 〇與灑水龍頭S之間堵塞成水 密狀態。 如上所述，在本發明的灑水龍頭的安裝構造，僅藉由 將灑水龍頭s旋入於接頭1 0，能夠容易地安裝成在該接 頭1 0不會產生漏水。因此，在進行作業之際，不須要捲 繞密封帶或塗佈密封劑等的防水手段，又作業本身即使不 使用板手等的工具亦可容易地進行，並且旋入終端位置伴 隨著按壓感而可得知，所以不會有過度旋入之虞，也不會 產生因作業者的不同所引起之安裝位置偏移等的參差不齊 之虞。 又，在本發明的安裝構造，鎖定環20是如第2圖所 示，因其內側彎曲之弧狀部分20a卡合於階差部7，所以 使灑水龍頭S朝將螺絲鬆弛的方向旋轉的話，會作用成： 階差部7的上側之角部7a將壓接於該彎曲的處所，將鎖 定環20朝外側按壓擴大。因此，在較安裝之際多少需要 較大的力量，但能夠由接頭1 〇將灑水龍頭S取下，並且 在此時，因不會有使鎖定環20破損之虞，所以取下後， 同樣地能夠再次將灑水龍頭S安裝。 第5圖是顯示鎖定環之其他實施形態者。如圖所示， 在此情況時，將鎖定環2 1形成：其內徑不作成一定的圓 弧狀者，藉由在預定位置加以屈曲，使三處所的卡止部 2 1 a朝內側突出。此鎖定環2〗也與上述者同樣地，發揮 下述功能：在已將灑水龍頭S旋入至接頭1 0之際’與該 傾斜導引面6接觸而朝外側被按壓擴大，在設有階差部7 -11 - 1266019 Ο) 的位置返回成原狀，藉由卡止部21a嵌入於階差部7，使 得在將灑水龍頭S定位保持於連接在接頭1 0之狀態。 第6圖是顯示上述鎖定環21之卡合狀態的斷面圖。 如圖所示，該鎖定環2 1並非以剖面呈圓形之線材所構成 者，而是以內周側（在第6圖爲右側）成山型之剖面大致 呈5角形的構件所形成。因此，在此情況時，當使灑水龍 頭S由接頭1 0取下地旋轉時，則將作用成階差部7的上 側之角部7a接觸於鎖定環2 1的內周上側之傾斜面，而將 該鎖定環21朝外側（在第6圖爲左側）按壓擴大，藉 此，鎖定環21與階差部7之卡合脫離，使得可將灑水龍 頭S由接頭1 0取下。 第7圖是顯示本發明之灑水龍頭的其他安裝構造之斷 面圖。如圖所示，在此情況時，將保持鎖定環22之凹槽 9設置於灑水龍頭S的安裝部1之外周，而將供該鎖定環 22卡合之階差部14設置於接頭10的內周。因此，該鎖 定環22是在進行灑水龍頭S的安裝之際，與設在接頭10 的內周之傾斜導引面1 5接觸，而縮小直徑地朝內側被按 壓，在設有階差部1 4的位置朝外側開放而嵌入至該階差 部1 4。此時，保持於形成在凹槽9的上側之卡合槽8的 圓形環30是與接頭1〇的內周面接觸，將兩者之間堵塞成 水密是與上述者完全相同。因此，其所發揮之功能也與上 述實施形態相同。 再者，在此實施形態者，當使灑水龍頭S朝取下的方 向旋轉時，因形成在接頭1 〇的階差部1 4之下側的角部 •12- 22 (10) 1266019 1 4a壓接於鎖定環22的外側之彎曲的面，所以鎖定環 承受縮小直徑的方向之力，解除了與階差部14之卡合< 如上所述，在本發明之灑水龍頭的安裝構造’灑水 頭S可取下且容易地安裝於接頭1 0，且不論是誰進行 業，亦可不會發生漏水地確實安裝於正確的位置。 再者，在圖示的實施形態，作爲灑水龍頭S，以將 熱分解機構內裝於本體3者爲例作了說明，但本發明的 裝構造，若藉由螺紋的螺合可將灑水龍頭安裝者的話’ 論何種灑水龍頭均可，例如，亦可爲框架成爲馬蹄型之 軛型者。 又，在圖示的實施形態，作爲鎖定環2 0、21，以 削了周圍之一部分者爲例，但使用於本發明的安裝構造 鎖定環，若爲卡合的部分在縮小直徑或擴大直徑的方向 有彈性而可壓動者的話即可，例如亦可爲使複數個卡止 連續成多角形狀之環狀者。 且，在圖示的實施形態，顯示鎖定環20、21、22 在直徑方向可動作，但在上下方向幾乎不可動作地嵌入 凹槽9、1 3的狀態者，但將該凹槽9、1 3之槽寬度（上 方向的尺寸）作成較鎖定環 20、21、22的外徑（或 度）稍大即可，藉此，在將灑水龍頭S連結於接頭1 〇 狀態下，可進行灑水龍頭S的安裝位置之微調整。再者 即使如此設計，因鎖定環20、21、22亦可發揮本來的 止脫落功能，密封構件之圓形環是保持於灑水龍頭S與 頭1 0之間，所以不會有發生漏水之虞。 龍 作 感 安 不 框 切 之 具 部 是 於 下 厚 之 防 接 -13- (11) 1266019 〔發明效果〕 如上所述，在本發明中，於申請專利範圍第1項或第 3項所記載的灑水龍頭的安裝構造，因在灑水龍頭的旋入 終端位置，將鎖定環嵌入於階差部，灑水龍頭在使密封構 件之圓形環介裝的狀態下連結保持於接頭，所以在作業之 際，不須要施行捲繞密封帶或塗佈密封劑等之防水手段’ 又作業本身也不需要使用板手等的工具，可容易地進行。 因此，可謀求提昇作業困難的灑水龍頭之安裝作業性，減 輕作業員的負擔，並且即使在安裝後，也不會有密封帶的 破裂片或密封劑的一部分混入到灑水龍頭的內部而妨礙作 動之虞，消除了在這種裝置引起作動不良之虞。 又，灑水龍頭的旋入終端位置可伴隨按壓感而得知， 所以具有下述效果：不會有過度旋入之虞，防止因過大的 力量作用所引起的損傷事故，並且，即使複數位作業者進 行作業，也不會在安裝方式上產生參差不齊，可使灑水龍 頭不會產生漏水地，加以確實地安裝於正確位置。 且，在申請專利範圍第2項或第4項之發明，因將導 引鎖定環用之傾斜導引面設置於安裝部的外周或接頭之內 周，所以可獲得可圓滑且確實地進行鎖定環對於階差部之 送入作業，可進一步提昇作業性之效果。 【圖式簡單說明】 第1圖是顯示本發明的灑水龍頭的安裝構造的實施形 -14- (12) 1266019 態之局部剖面側面圖。 第2圖是第1圖之局部擴大圖。 第3圖是第1圖所示的接頭之局部橫斷面圖。 第4圖是使用於第1圖的安裝構造之鎖定環的平面 圖。 第5圖是顯示鎖定環之其他例的接頭安裝狀態之橫斷 面圖。 第6圖是顯示根據其他鎖定環之卡合狀態的局部斷面 圖。 第7圖是顯示本發明的其他實施形態之局部剖面側面 圖。 〔主要元件符號說明〕 1安裝部 2板手的卡合部 3本體 4集熱板 5公螺紋 6、 15傾斜導引面 7、 14階差部 7 a、1 4 a 角部 8、 12卡合槽 9、 1 3 凹槽 10接頭 •15- (13) 1266019 1 1母螺紋 20、21、22 鎖定環 20a弧狀部分 2 1 a 卡止部 S灑水龍頭Further, as a conventional one that is not screwed in such a manner, a bag nut having a locking ring having a locking piece on the inner circumferential surface is attached to the lower end of the joint in advance so as to be provided on the outer peripheral surface. A sprinkler having a locking groove that can be engaged with the locking piece is inserted into the bag nut, and the faucet is not detached by the locking of the locking piece and the locking groove For the joint. (For example, refer to Patent Document 1). Further, as another conventional one, a spherical body is provided on the peripheral wall of the joint, and a sliding cylinder for driving the spherical body by a spring force is provided on the outer side of the joint, by the sprinkler An annular groove engageable with the spherical body is disposed on the front outer peripheral surface to move the sliding cylinder in a state where the sprinkling faucet is inserted into the joint, and the ball is pressed -4- (2) 1266019 The ball is fitted to the annular groove, and the sprinkler is connected to the joint (for example, refer to Patent Document 2). Further, a person who installs the sprinkler by engagement without using a screw, and a sealing member such as a circular ring is additionally provided between the sprinkler and the joint in order to prevent water leakage. [Patent Document 1] Japanese Patent No. 2907950 (page 2-3, first drawing) [Patent Document 2] Japanese Patent No. 2559280 (page 2, page 3, first drawing) [Summary of Invention] [Invention Problem to be Solved] In the above-described conventional sprinkler installation, the male screw and the female screw are screwed together to prevent water leakage, and the sealing tape must be wound in the screw portion or the sealant must be applied in advance. This makes the work complicated and causes the efficiency of the operation to be reduced. Further, in the case of using the above-mentioned sealing tape, when the winding of the threaded surface is sluggish, the sealing tape does not rotate together with the male thread at the time of screwing in, so that the biting of the female thread is incomplete, and water leakage may occur. Then, when the coil is strongly wound in order to prevent this problem, the thin and flexible sealing tape is broken, and the problem of having to perform the work again occurs. -5- (3) 1266019 In addition, when a sealant is used, generally, since the sealant is a liquid having a slight viscosity and has an adhesive property and is solidified with time, it is excessively coated. When it is placed on the spiral surface, when a sprinkler is installed, a part of it flows into the piping. When the sealant enters the piping, the water stop valve of the sprinkler is fixed by an adhesive agent having an adhesive property. In the event of a fire, there will be a major problem that will hinder its movement. On the other hand, when the amount of application of the sealant is small, sufficient sealing property cannot be obtained, and water leakage may occur. Further, the installation work of attaching the sprinkler to the pipe must be performed in an upward posture on the step stool or the footrest, so that the burden on the operator is large and the efficiency is also poor. Further, in this operation, in order to prevent water leakage, the sprinkler must be surely screwed into the pipe. However, when it is tightened with a strong force of more than necessary, the seal band may be broken or the thread may be worn to cause water leakage. Conversely, when the tightening force is weak, sufficient sealing of the sealing tape cannot be obtained, and in this case, there is also a possibility of water leakage, and proficiency is required for the operation. Further, since the threaded portion is formed in a tapered shape, there is no abutting portion in the axial direction between the sprinkling faucet and the piping side, so that the dimension measurement at the time of mounting is difficult, and at the time of installation, the above-described tightening is possible. Because of the limitation of the moment, most of the sprinklers are installed on the ceiling without unevenness, and even if it is a skilled person, it is difficult to perform the work, and it takes a long time to carry out the problem. In addition, it is easy to install and install workability without the use of such a screwing, but it is necessary to provide a locking ring having a card -6 - (4) 1266019 stopper on the inner peripheral surface. The special shape of the bag nut, or the joint is processed into a ball which is infiltrated toward the inner side thereof, and a sliding cylinder which is required to be pushed by a spring to push the ball on the outer side thereof may complicate the structure and increase the manufacturing cost. The problem arises. Further, since the locking piece or the ball has only a function of preventing the faucet from coming off, and does not have a sealing property, in order to prevent water leakage, it is necessary to separately provide a sealing member such as a circular ring, and in order to surely prevent water leakage, it is necessary to raise it. Assembly accuracy, which causes difficulty in inserting the sprinkler, and causes a new problem such as damage to the circular ring during insertion. Further, the sprinkler that is attached by the engagement of the locking piece and the locking groove is difficult to remove once it is attached to the joint, and even if it can be removed, the locking piece is damaged and cannot be reused. As a result, it is necessary to replace the entire joint, which is not only poor in maintainability, but also causes problems of increasing repair time or cost. The present invention has been made in solving the problems of the above-described conventional sprinkling faucet mounting structure. [Means for Solving the Problems] In order to solve the above problems, the invention of claim 1 of the present invention is directed to screwing a male screw provided on the outer periphery of a mounting portion of a sprinkling faucet to an inner circumference of a joint. a female thread, a mounting structure for connecting the sprinkler to the sprinkler of the drop tube via the joint, wherein a sealing member for contacting the joint between the joint and the sprinkler is provided to maintain watertightness, and A locking ring of enlarged diameter '(5) 1266019 is provided on the inner circumference of the joint and a step portion for fitting the locking ring is disposed on the outer periphery of the mounting portion of the sprinkler rim at the screw-in end position of the sprinkler, by The lock ring is embedded in the step portion so that the sprinkler is not loosely coupled to the joint. The invention of claim 2 is the invention of claim 1, wherein the inclined guide surface is provided above the step portion of the mounting portion of the sprinkler, and the tilt guide is inserted when the sprinkler is screwed into the joint The lead surface is slidably coupled to the locking ring provided on the joint, and the locking ring is enlarged in diameter to be guided to the step portion. The invention of claim 3 is directed to screwing a male screw provided on the outer periphery of the mounting portion of the sprinkling faucet to a female screw provided on the inner circumference of the joint, and connecting the sprinkler to the drop pipe via the joint. a mounting structure of a faucet, characterized in that: a sealing member for contacting both of the joints and the mounting portion of the water faucet to maintain watertightness is provided, and a locking ring of a reduced diameter is disposed outside the mounting portion of the water faucet, A step portion for fitting the lock ring is provided on the inner circumference of the joint, and the lock ring is inserted into the step portion at the screw-in end position of the sprinkler so that the sprinkler is not loosely coupled to the joint. The invention of claim 4 is the invention of claim 3, wherein an inclined guide surface is provided below the step portion of the joint, and the inclined guide surface is provided when the sprinkling faucet is screwed into the joint The locking ring of the sprinkler is slid, and the locking ring is reduced in diameter to be guided to the step portion. [Embodiment] Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings. -8- (6) 1266019 Fig. 1 is a partial cross-sectional side view showing the mounting structure of the sprinkler of the present invention, and Fig. 2 is an enlarged view of the portion. In the figure, reference numeral 10 denotes a substantially cylindrical joint having a female thread 11 on the inner circumference, and the joint 10 is connected to a horizontal pipe (not shown) that is attached to the ceiling as in the related art. ) and drop down to the down tube near the ceiling (not shown). In addition, the sprinkling faucet S is provided on the upper side of the engaging portion 2 of the hexagonal bolt-shaped wrench provided in the middle of the middle, and the mounting portion 1 having the male screw 5 formed on the outer circumference is provided in the engaging portion. In the main body 3 on the lower side, a heat-damage mechanism (not shown) that is decomposed by heat during a fire and opens a discharge port (not shown) for extinguishing water is incorporated. Further, in Fig. 1, reference numeral 4 denotes a heat collecting plate which is provided on the lower side of the main body 3 and which is used for the body 3 to absorb thermal heat and the like to perform thermal induction decomposition. Here, in the mounting structure of the present invention, the groove 13 is provided on the inner side of the joint 10 on the lower side where the female thread 11 is provided, and the lock ring 20 is fitted into the groove. The lock ring 20 is formed of a spring steel as shown in Fig. 4, and has a substantially C-shaped viewing angle after a part of the cutting. Further, the inner diameter of the lock ring 20 is set to be slightly smaller than the outer diameter of the mounting portion 1 of the sprinkler s. Therefore, in the state of being embedded in the groove 13, as shown in Fig. 3, the inner end side thereof is maintained in a state of being slightly protruded from the inner peripheral surface of the joint 1 〇. Further, an engagement groove 1 2 is provided on the inner circumference of the upper side of the female screw 1 1 of the joint 1 ,, and a circular ring 30 which is a sealing member is fitted to the engagement groove. On the one hand, the sprinkler S is a lower -9 - (7) 1266019 end side enlarged diameter ' of the mounting portion 1 provided with the male thread 5, and a step portion 7 in which the lock ring 20 is fitted is provided. Therefore, the step portion 7 is formed at a position where the sprinkling faucet S is screwed into the joint, and is formed at a position opposite to the groove 13 provided in the joint 10. Next, the mounting method of the joint 1 〇 and the sprinkler S having the above structure will be described. First, the mounting portion 1' in which the sprinkling faucet S is inserted under the joint 10 provided on the ceiling of the ceiling (not shown) is inserted into the outer periphery of the mounting portion 藉 by rotating the sprinkler S The male thread 5 is screwed into the female thread n provided on the inner circumference of the joint 1 ,, and is screwed into the sprinkler S. At this time, since there is no seal band or sealant which hinders the rotation of the screw portion, and the screw itself does not have a tapered shape, the work can be easily performed without using a tool such as a wrench. Then, when the sprinkler S is gradually screwed into the joint 10, the inclined guide surface 6 finally provided on the lower side of the male thread 5 comes into contact with the lock ring 20 held in the recess 13 of the joint 10, Along with the screwing in of the sprinkling faucet S, the elastic locking ring 20 is slidably attached to the inclined guiding surface 6 to expand the diameter and is pressed into the recess 13. When the sprinkling faucet S is further screwed into this state, the step portion 7 which is finally provided at the outer periphery of the lower end of the mounting portion 1 is formed at a position opposed to the recess 13 where it is pressed and expanded into a locking ring located in the recess 13. 20 is returned to the original state by its own elastic restoring force, and its inner end is fitted into the step portion 7. Therefore, the sprinkling sprinkler S is stopped at this position with the feeling of pressing, preventing further screwing in. At this time, the upper side of the mounting portion 1 is inserted into the inner -10- 1266019 (8) side of the circular ring 30 held in the engaging groove 12 of the joint 10, and the joint 1 and the sprinkler are attached by the circular ring 30. The S is blocked into a watertight state. As described above, in the mounting structure of the sprinkler of the present invention, only by sprinkling the sprinkler s on the joint 10, it is possible to easily mount the spout without causing water leakage at the joint 10. Therefore, when the work is performed, it is not necessary to wind the sealing tape or the waterproofing means such as the sealant, and the work itself can be easily performed without using a tool such as a wrench, and the screwing into the terminal position is accompanied by the feeling of pressing. However, it can be known that there is no excessive screwing in, and there is no unevenness in the mounting position shift due to the difference of the operator. Further, in the attachment structure of the present invention, as shown in Fig. 2, the lock ring 20 is engaged with the step portion 7 by the curved portion 20a which is bent inside, so that the sprinkler S is rotated in the direction in which the screw is loosened. It acts as follows: The upper corner portion 7a of the step portion 7 is pressed against the curved portion, and the lock ring 20 is pressed outward to expand. Therefore, it is necessary to remove a large amount of force at the time of installation, but the sprinkler S can be removed by the joint 1 ,, and at this time, since the lock ring 20 is not broken, the same is performed after the removal. The ground can again install the sprinkler S. Fig. 5 is a view showing another embodiment of the lock ring. As shown in the figure, in this case, the locking ring 2 1 is formed such that its inner diameter does not have a certain arc shape, and the locking portion 2 1 a of the three places protrudes inward by being bent at a predetermined position. . In the same manner as the above, the lock ring 2 is configured to be in contact with the inclined guide surface 6 and to be pressed outwardly when the sprinkler S is screwed into the joint 10, and is provided. The position of the step portion 7 -11 - 1266019 Ο) is returned to the original state, and the locking portion 21a is fitted into the step portion 7, so that the sprinkler S is positioned and held in the state of being connected to the joint 110. Fig. 6 is a cross-sectional view showing the engagement state of the lock ring 21. As shown in the figure, the lock ring 2 1 is not formed of a wire having a circular cross section, but is formed of a member having a substantially 5-shaped cross section on the inner peripheral side (the right side in Fig. 6). Therefore, in this case, when the sprinkler S is rotated by the joint 10, the upper corner portion 7a acting as the step portion 7 is brought into contact with the inclined surface on the upper side of the inner circumference of the lock ring 2, and The lock ring 21 is press-expanded outward (on the left side in FIG. 6), whereby the lock ring 21 is disengaged from the step portion 7, so that the sprinkler S can be removed from the joint 10. Fig. 7 is a cross-sectional view showing another mounting structure of the sprinkler of the present invention. As shown in the figure, in this case, the groove 9 holding the lock ring 22 is disposed on the outer circumference of the mounting portion 1 of the sprinkling faucet S, and the step portion 14 for engaging the lock ring 22 is disposed at the joint 10 Inner week. Therefore, the lock ring 22 is in contact with the inclined guide surface 15 provided on the inner circumference of the joint 10 when the sprinkling faucet S is mounted, and is pressed toward the inner side with a reduced diameter, and the step portion 1 is provided. The position of 4 is open to the outside and is embedded in the step portion 14 . At this time, the circular ring 30 held by the engaging groove 8 formed on the upper side of the groove 9 is in contact with the inner peripheral surface of the joint 1〇, and the watertight therebetween is completely the same as the above. Therefore, the functions performed by the same are the same as those of the above embodiment. Further, in this embodiment, when the water spout S is rotated in the removal direction, the corner portion formed on the lower side of the step portion 14 of the joint 1 • 12-22 (10) 1266019 1 4a The pressure is pressed against the curved surface on the outer side of the lock ring 22, so that the lock ring receives the force in the direction of reducing the diameter, and the engagement with the step portion 14 is released. < As described above, the attachment structure of the sprinkler of the present invention' The sprinkler head S can be removed and easily attached to the joint 10, and no matter who carries it, it can be surely installed in the correct position without water leakage. Further, in the illustrated embodiment, the sprinkling faucet S is described as an example in which the thermal decomposition mechanism is incorporated in the main body 3. However, in the mounting structure of the present invention, the sprinkler can be screwed by screwing. The installer's words can be said about what kind of sprinkler can be used, for example, the frame can be a horseshoe type yoke type. Further, in the illustrated embodiment, as the locking rings 20 and 21, for example, one of the surrounding portions is cut, but the mounting structure locking ring used in the present invention is in a reduced diameter or an enlarged diameter. If the direction is flexible and the pressure is sufficient, for example, it may be a ring in which a plurality of locks are continuously formed into a polygonal shape. Further, in the illustrated embodiment, the lock rings 20, 21, and 22 are operable in the radial direction, but the grooves 9 and 13 are almost inoperable in the vertical direction, but the grooves 9 and 1 are fitted. The groove width (the size in the upper direction) of 3 is slightly larger than the outer diameter (or the degree) of the lock rings 20, 21, and 22, whereby the sprinkler S can be sprinkled while being connected to the joint 1 Fine adjustment of the installation position of the faucet S. Furthermore, even if it is designed in this way, since the lock rings 20, 21, 22 can also exert the original function of stopping the fall, the circular ring of the sealing member is held between the sprinkler S and the head 10, so that there is no leakage. . The effect of the dragon is not the same as that of the lower part. - (11) 1266019 [Effect of the invention] As described above, in the present invention, it is described in item 1 or item 3 of the patent application scope. The mounting structure of the sprinkling faucet is such that the locking ring is embedded in the stepped portion at the screwing end position of the sprinkling faucet, and the sprinkling faucet is connected and held to the joint in a state in which the circular ring of the sealing member is interposed, so that the operation is performed. In addition, it is not necessary to apply a waterproofing means such as a winding sealing tape or a coating sealant, and the work itself does not require the use of a tool such as a wrench, and can be easily performed. Therefore, it is possible to improve the installation workability of the faucet which is difficult to work, and to reduce the burden on the operator, and even after the installation, a rupture piece of the seal tape or a part of the sealant is mixed into the faucet and hinders the movement. After that, the problem of malfunction caused by such a device is eliminated. Further, the position of the sprinkling faucet of the sprinkling faucet can be known with the feeling of pressing, so that there is no effect of excessive screwing in, preventing damage accidents caused by excessive force, and even multiple operations If the work is carried out, the installation method will not be uneven, and the sprinkler can be installed in the correct position without causing water leakage. Further, in the invention of claim 2 or 4, since the inclined guide surface for guiding the lock ring is provided on the outer circumference of the mounting portion or the inner circumference of the joint, it is possible to obtain a smooth and reliable lock. The ring can further improve the workability of the step-by-step operation. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial cross-sectional side view showing the embodiment of the mounting structure of the sprinkler of the present invention in the form of -14-(12) 1266019. Fig. 2 is a partial enlarged view of Fig. 1. Figure 3 is a partial cross-sectional view of the joint shown in Figure 1. Fig. 4 is a plan view showing a lock ring used in the mounting structure of Fig. 1. Fig. 5 is a cross-sectional view showing a state in which the joint is mounted in another example of the lock ring. Fig. 6 is a partial cross-sectional view showing the engagement state according to other lock rings. Figure 7 is a partial cross-sectional side view showing another embodiment of the present invention. [Description of main component symbols] 1 mounting portion 2 engaging portion of the wrench 3 main body 4 heat collecting plate 5 male thread 6, 15 inclined guiding surface 7, 14 step portion 7 a, 1 4 a corner portion 8, 12 card Slot 9, 1 3 Groove 10 joint •15- (13) 1266019 1 1 female thread 20, 21, 22 locking ring 20a arcuate part 2 1 a locking part S sprinkler