200540355 (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】 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。 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 - 200540355 (2) 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〕200540355 (1) 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a structure in which a sprinkler for fire extinguishing is mounted on a joint for a pipe and a sprinkler. [Prior art] Generally, a sprinkler is mounted on a drop pipe through a joint, and the drop pipe is connected to a horizontal pipe laid in the ceiling and is lowered near the ceiling surface. Here, conventionally, in order to connect the sprinkler to the joint, a male thread provided on the outer periphery of the mounting portion of the sprinkler is screwed to a female thread provided on the inner periphery of the joint. When water is introduced into the piping, water does not leak, and a sealing tape is wound around this threaded portion or a sealant is applied. In addition, as a conventional one that does not require such screwing, a bag-type nut provided with a locking ring having a locking piece on the inner peripheral surface is previously attached to the lower end of the joint so that the A sprinkler having a locking groove capable of interlocking with the locking piece is inserted into the bag-type nut, and the sprinkler is installed without falling off by the mutual locking of the locking piece and the locking groove.于 连接。 In the connector. (For example, refer to Patent Document 1). Furthermore, as another conventional one, a ball is provided on the peripheral wall of the joint toward the inside thereof, and a slide cylinder for driving the ball by a spring is provided on the outer side of the joint, and a sprinkler An annular groove can be fitted on the front outer peripheral surface that can be fitted with the sphere to move the slide tube under the condition that the sprinkler is inserted in the joint, and the sphere is pressed -4-200540355 (2). A sphere is fitted in an annular groove, and a sprinkler is connected to a joint (for example, refer to patent document 2). In addition, a person who installs a sprinkler by engaging it without using a screw is provided with a sealing member such as a circular ring between the sprinkler and the joint in order to prevent water leakage. [Patent Document 1]
曰本發明專利第290795 0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〕The present invention patent No. 290795 0 (page 2-3, figure 1) [Patent Document 2] Japanese new patent publication No. 2559280 (page 2-3, figure 1) [Summary of the Invention] [Invention Office Problems to be solved]
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· 200540355 (3) 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"時間變彳七而固 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λ到 配管內時，灑水龍頭的止水閥受到具有接著性的密封齊彳所 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 - 200540355 (4) 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， 而必須提高其組裝精度，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’ 200540355 (5) 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。In the installation of the conventional sprinkler mentioned above, in order to prevent water leakage, the screwing of the male thread and the female thread must be wound with a sealing tape or a sealant on the screwed portion in advance, so that the operation is complicated and formed. The reasons for the decrease in operational efficiency. In the case where the above-mentioned sealing tape is used, when the winding of the thread surface is slow, the sealing tape will not rotate with the male thread during screwing, so that the bite of the female thread is incomplete, and water leakage may occur. In order to prevent this problem, if the tape is wound strongly, a thin and flexible sealing tape may be broken, and a problem that the operation must be performed again may occur. -5 · 200540355 (3) In the case of using a sealant, it is' generally 'because the sealant is a liquid with a slight viscosity and has adhesiveness', which solidifies as "time changes", so When it is excessively applied to the spiral surface, "a part of the sprinkler may flow into the pipe when the sprinkler is installed." When the sealant enters the pipe, the water stop valve of the sprinkler is sealed with an adhesive seal. Qi Zheng fixed that in the event of a fire, there would be a serious problem that would hinder his operation. On the other hand, "when the coating amount of the sealant is small", sufficient sealing properties cannot be obtained ", and there is a possibility of causing water leakage. In addition, the installation work of installing the sprinkler faucet on the piping must also be performed in an upward posture on a step stool or footing, which causes a large burden on the operator's efficiency. In addition, in order to prevent water leakage during this operation, the sprinkler must be screwed into the pipe surely. However, when tightened with a strong force more than necessary, the sealing band may be broken or the thread may be worn, causing water leakage. On the contrary, when the tightening force is weak, sufficient sealing properties of the sealing tape cannot be obtained, and in this case, there is a possibility of water leakage, and proficiency is required for the operation. In addition, because the threaded portion is formed in a tapered shape, there is no abutment portion in the axial direction between the sprinkler and the piping side. Therefore, it is difficult to measure the size of the entry and exit during installation, and during the installation, the above-mentioned tightening rotation Due to the limitation of the moment, a large number of sprinklers will not be installed on the ceiling unevenly. Even a skilled person is not easy to perform this operation, and a problem that requires a long time to occur. It's also possible to install only by inserting without screwing. Although it is easy to install and can improve workability, it is necessary to install a retaining ring with a card-6-200540355 (4) stopper on the inner peripheral surface. The special shape of the bag-shaped nut, or the joint is processed into a sphere to invade it, and a slide tube that pushes the sphere with a spring push is required on the outside, which will complicate its structure and increase the manufacturing cost. Problems arise. In addition, the locking piece or the ball only has the function of preventing the sprinkler from falling off, and has no sealing performance. Therefore, in order to prevent water leakage, a sealing member such as a circular ring must be additionally provided. In order to prevent water leakage, the assembly must be improved. Accuracy will cause new installation problems that make the installation of sprinklers difficult, and may cause damage to the circular ring during installation. In addition, the sprinkler faucet installed by the mutual locking between the locking piece and the locking groove is difficult to remove once it is installed in the joint, and even if it can be removed, the locking piece will be damaged and cannot be reused, so As a result, there is a problem that the entire joint must be replaced, which not only has poor maintainability but also increases repair time or cost. The present invention has as its object to solve the problems with the conventional mounting structure of a sprinkler as described above. [Means to Solve the Problems] In order to solve the above-mentioned problems, the first invention of the scope of patent application of the present invention is directed to screwing a male screw provided on the outer periphery of a mounting portion of a sprinkler to an inner periphery of a joint. The installation structure of the sprinkler faucet that connects the sprinkler faucet to the down pipe through the joint is characterized in that a sealing member for maintaining watertightness is provided between the joint and the mounting part of the sprinkler faucet, In addition, a locking ring with an enlarged diameter is provided on the inner periphery of the joint '200540355 (5), and a stepped portion for fitting the locking ring is provided on the outer periphery of the installation part of the sprinkler, and the end position of the sprinkler is screwed in by The locking ring is embedded in the stepped portion so that the sprinkler is not loosely connected to the joint.
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。The invention in the second scope of the patent application is the invention in the first scope of the patent application, wherein an inclined guide surface is provided above the stepped portion of the installation part of the sprinkler faucet, and the guide is inclined when the sprinkler is screwed into the joint. The lead surface is in sliding contact with a lock ring provided at the joint, and the lock ring is enlarged in diameter to be guided to the step portion.
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- 200540355 (6) 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，符號丨〇爲 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 不）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1 0之設有母螺 紋1 1的下側的內側設有凹槽1 3，將鎖定環2 0嵌入該凹 槽。 該鎖定環2 0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 0的內周 面朝稍微內側突出之狀態。 又，在該接頭1 0的母螺紋1 1之上側內周，設有卡合 槽12，將成爲密封構件之圓形環30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 - 200540355 (7) 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 1 〇之際，在該旋入終端位置，形成與設在接頭1 0之凹槽 1 3相對向。 其次，說明關於具有上述結構之接頭1 0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1的外周之公 螺紋5螺合於設在接頭1 0的內周之母螺紋1 1，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 1 〇的凹槽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1 3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- 200540355 (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7 a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 1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 - 200540355 (9) 的位置返回成原狀，藉由卡止部2 1 a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 〇之狀態。 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2 1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1 0 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10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 0的階差部1 4之下側的角部 -12 - 22 200540355 (10) 1 4 a壓接於鎖定環2 2的外側之彎曲的面’所以鎖定環 承受縮小直徑的方向之力，解除了與階差部丨4之卡合 如上所述，在本發明之灑水龍頭的安裝構造，灑7」 頭S可取下且容易地安裝於接頭1 〇 ’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、2 1，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2 0、2 1、2 2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· 200540355 (11) 〔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- 200540355 (12) 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 、 13 凹槽 10接頭 •15- 200540355 (13) 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The invention in item 3 of the scope of patent application is directed to a male thread provided on the inner periphery of a joint by screwing a male screw provided on the outer periphery of a mounting part of a sprinkler faucet to a spigot connected to a downspout through the joint. The installation structure of the faucet is characterized in that a sealing member for maintaining watertightness is provided between the joint and the installation part of the sprinkler, and a lock ring capable of reducing the diameter is provided on the outer periphery of the installation part of the sprinkler, Furthermore, a stepped portion for fitting the locking ring is provided on the inner periphery of the joint, and the locking ring is embedded in the stepped portion at the screw-in terminal position of the sprinkler, so that the sprinkler is not loosely connected to the joint. The invention in item 4 of the scope of patent application is the invention in item 3 of the scope of patent application, in which an inclined guide surface is provided below the step portion of the joint, and the inclined guide surface and the device are installed when the sprinkler is screwed into the joint. Sliding contact with the lock ring of the sprinkler faucet, and reducing the diameter of the lock ring to the step portion. [Embodiment] Hereinafter, the present invention will be described in detail based on the embodiment shown in the drawings. -8- 200540355 (6) Fig. 1 is a partial cross-sectional side view showing the mounting structure of the sprinkler faucet of the present invention. Fig. 2 is an enlarged view of the portion. In the figure, reference numeral 〇 is a substantially cylindrical joint provided with a female thread 11 on the inner periphery, and the joint 10 is connected to a horizontal pipe (not shown in the figure) connected to the ceiling in the same manner as the conventional one. (Shown) and drop down tube (not shown) near the ceiling. Further, the sprinkler S is also provided with a mounting portion 1 having a male thread 5 formed on the outer periphery of the engaging portion 2 provided on the hexagonal bolt-shaped wrench in the middle range in the same manner as in the prior art. 2 The lower body 3 is provided with a thermal destruction mechanism (not shown) which is decomposed by the heat of a fire and opens a spout (not shown) for extinguishing water. In addition, in FIG. 1, reference numeral 4 is a heat collecting plate provided on the lower side of the main body 3 and used for the main body 3 to absorb fire heat and perform thermal induction decomposition. Here, in the mounting structure of the present invention, a groove 13 is provided on the inner side of the lower side of the joint 10 where the female screw 11 is provided, and the lock ring 20 is fitted into the groove. This locking ring 20 is a C-shaped plane view after cutting, as shown in Fig. 4, and can be formed by spring steel with a certain diameter. 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, as shown in Fig. 3, in the state of being fitted in the grooves 13, the inner end side is maintained in a state where it protrudes slightly inward from the inner peripheral surface of the joint 10. An engagement groove 12 is provided on the inner periphery of the upper side of the female screw 11 of the joint 10, and a circular ring 30 serving as a sealing member is fitted into the engagement groove. On the one hand, the sprinkler S is the lower part of the mounting part 1 provided with a male thread 5 (2005) (7) The end side is enlarged in diameter, and there is a stepped part 7 for the locking ring 20 to be inserted therein. Therefore, the step 7 is formed so as to face the groove 13 provided in the joint 10 at the end of the turning when the sprinkler S is screwed into the joint 10. Next, a description will be given of an installation method of the joint 10 and the sprinkler S having the above-mentioned structure. First of all, the mounting part 1 of the sprinkler s is inserted into the inside of the ceiling 10 below the joint 10 installed on the ceiling panel, which is mounted on a not-shown pipe, and the sprinkler S is rotated to set the mounting part 1 on the outer periphery of the mounting part 1. The male thread 5 is screwed to the female thread 11 provided on the inner periphery of the joint 10, and is screwed into the sprinkler S. At this time, since there is no sealing tape or sealant that prevents the rotation of the threaded portion, and the thread itself does not have a tapered shape, this operation can be easily performed without using a tool such as a wrench. Then, when the sprinkler S is gradually screwed into the joint 10 in this way, the inclined guide surface 6 finally provided on the lower side of the male thread 5 will contact the locking ring 2 0 of the groove 13 held in the joint 10. As the sprinkler S is screwed in, the elastic locking ring 20 will slide into contact with the inclined guide surface 6 to increase its diameter and be pressed into the groove 13. When the sprinkler S is further screwed in this state, the step portion 7 which is finally provided on the outer periphery of the lower end of the mounting portion 1 forms a position opposite to the groove 13, and is pressed to expand into a lock located in the groove 13. The ring 20 returns to its original state by its elastic restoring force, and its inner end is embedded in the step portion 7. Therefore, the screwed-in sprinkler S stops at this position with a feeling of pressure, preventing further screwing. At this time, the upper side of the mounting portion 1 is inserted into the inner ring 30 of the circular ring 30 held in the engaging groove 12 of the joint 10-200540355 (8) side, and the joint 10 and the sprinkler are connected with the circular ring 30 S is blocked into a watertight state. As described above, in the installation structure of the sprinkler faucet of the present invention, the sprinkler faucet S can be easily installed only by screwing the sprinkler faucet S into the joint 10 so that no water leakage occurs at the joint 10. Therefore, it is not necessary to use a waterproofing means such as a sealing tape or a sealant to perform the work, and the work itself can be easily performed without using tools such as a wrench, and the screwing into the terminal position is accompanied by a pressing feeling. It can be seen that, therefore, there is no risk of excessive screwing, and there is no risk of unevenness in the installation position due to different operators. Further, in the mounting structure of the present invention, as shown in FIG. 2, the curved portion 20 a of the inner curved portion is engaged with the step portion 7. Therefore, if the sprinkler S is rotated in a direction to loosen the screw, 'It will work: The upper corner portion 7a of the stepped portion 7 will be crimped to the curved space' and the lock ring 20 will be pressed outward to expand. Therefore, it takes a little more force than when it is installed, but the spigot S can be removed by the joint 10, and at this time, there is no risk of damaging the locking ring 20, so after removal, the same The ground can be reinstalled with the sprinkler S. Fig. 5 shows another embodiment of the locking ring. As shown in the figure, in this case, the locking ring 21 is formed: if its inner diameter is not made into a certain arc shape, the locking portions 2 1 a of the three places protrude inward by buckling at a predetermined position. . This locking ring 21 also functions as described above. When the sprinkler S is screwed into the joint 10, the locking ring 21 contacts the inclined guide surface 6 and is pressed and expanded outward. The step portion 7 -11-200540355 (9) returns to its original position, and the locking portion 2 1 a is embedded in the step portion 7 so that the sprinkler S is positioned and maintained in a state of being connected to the joint 10. FIG. 6 is a sectional view showing the engagement state of the lock ring 21. As shown in the figure, the locking ring 21 is not formed by a wire having a circular cross section, but is formed by a member having a substantially pentagonal cross section in a mountain shape on the inner peripheral side (right side in FIG. 6). Therefore, in this case, when the sprinkler S is rotated by being removed from the joint 10, the upper corner portion 7a acting as the stepped portion 7 contacts the inclined surface on the upper side of the inner periphery of the lock ring 21, and The locking ring 21 is pushed outwards (left side in FIG. 6) to be enlarged, whereby the engagement of the locking ring 21 and the step portion 7 is disengaged, so that the sprinkler S can be removed from the joint 10. Fig. 7 is a sectional view showing another installation 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 provided on the outer periphery of the mounting portion 1 of the sprinkler S, and the step portion 14 for engaging the lock ring 22 is provided on the joint 10. Within the week. Therefore, when the sprinkler S is installed, the locking ring 22 contacts the inclined guide surface 15 provided on the inner periphery of the joint 10, and is pressed toward the inside with a reduced diameter, and a stepped portion is provided. The position of 1 4 is opened to the outside and fits into the step portion 14. At this time, the circular ring 30 held in the engaging groove 8 formed on the upper side of the groove 9 is in contact with the inner peripheral surface of the joint 10, and the two are blocked in a watertight manner as described above. Therefore, its function is the same as that of the above embodiment. Furthermore, in this embodiment, when the sprinkler S is rotated in the direction of removal, the corner portion formed below the step portion 14 of the joint 10 is formed. -12-22 200540355 (10) 1 4 a is crimped to the curved surface on the outside of the lock ring 22, so the lock ring receives the force in the direction of reducing the diameter, and the engagement with the stepped portion 4 is released, as described above, in the installation structure of the sprinkler of the present invention The 7 ”head S can be removed and easily installed on the connector 10 ′, and it can be installed in the correct position without leaking, no matter who is in the industry. Moreover, in the embodiment shown in the figure, the sprinkler S has been 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 turned by screwing The installer can use any type of sprinkler. For example, the frame can be a horseshoe-shaped yoke. In the embodiment shown in the figure, as the locking rings 20 and 21, one of the surrounding parts is cut, but the locking ring used in the mounting structure of the present invention is reduced in diameter or enlarged if it is engaged. It is sufficient if the diameter direction is elastic and can be pressed. For example, it may be a ring in which a plurality of latches are continuously formed into a polygonal shape. Furthermore, in the illustrated embodiment, the lock rings 20, 21, and 22 are shown to be operable in the diameter direction, but are fitted into the grooves 9 and 1 3 in an almost inoperable manner in the vertical direction. The slot width (upward dimension) of 3 can be made slightly larger than the outer diameter (or degree) of the lock rings 20, 21, and 22. With this, the sprinkler S can be connected to the joint 10, and the sprinkler can be sprinkled. Fine adjustment of the installation position of the faucet S. Furthermore, even if it is designed in this way, the locking rings 20, 21, 22 can also exert their original anti-falling function, and the circular ring of the sealing member is kept between the sprinkler S and the head 10, so it will not happen. Risk of leakage. Long Zuo's sense of security is not framed by the under-thickness protection -13 200540355 (11) [Inventive effect] As described above, in the present invention, it is described in the first or third item of the scope of patent application The installation structure of the sprinkler faucet, because the locking ring is embedded in the stepped part at the end position of the sprinkler faucet, the sprinkler faucet is connected and maintained at the joint with the circular ring of the sealing member interposed, so during the operation In this case, waterproofing means such as winding a sealing tape or applying a sealant are not required. Moreover, the operation itself does not require the use of tools such as a wrench, and can be easily performed. Therefore, it is possible to improve the installation workability of the sprinkler faucet which is difficult to work, and reduce the burden on the operator. Even after the installation, there is no rupture of the sealing tape or a part of the sealant mixed into the sprinkler faucet to hinder the operation. This eliminates the risk of malfunction in such a device. In addition, the screw-in terminal position of the sprinkler can be known with the feeling of pressing, so it has the following effects: there is no risk of excessive screw-in, prevention of injury accidents caused by excessive force, and even multi-level operation If the operator performs the operation, there will be no unevenness in the installation method, so that the sprinkler will not leak, and it can be installed in the correct position. In addition, in the inventions in the second or fourth scope of the patent application, the inclined guide surface for the guide lock ring is provided on the outer periphery of the mounting portion or the inner periphery of the joint, so that it can be smoothly and reliably locked. The loop can further improve the workability of the stepping part. [Brief Description of the Drawings] FIG. 1 is a partial cross-sectional side view showing an embodiment of a -14-200540355 (12) state of a mounting structure of a sprinkler according to the present invention. Fig. 2 is a partially enlarged view of Fig. 1. Fig. 3 is a partial cross-sectional view of the joint shown in Fig. 1. Fig. 4 is a plan view of a locking ring used in the mounting structure of Fig. 1; Fig. 5 is a cross-sectional view showing a joint mounting state of another example of the lock ring. Fig. 6 is a partial cross-sectional view showing the engagement state of other lock rings. Fig. 7 is a partial sectional side view showing another embodiment of the present invention. [Description of main component symbols] 1 Mounting part 2 Engagement part for wrench 3 Main body 4 Heat collecting plate 5 Male thread 6, 15 Inclined guide surface 7, 14 step difference part 7 a, 1 4 a Corner part 8, 12 card Slots 9, 13 Grooves 10 Connectors • 15- 200540355 (13) 1 1 Female thread 20, 21, 22 Lock ring 20a Arc portion 2 1 a Stopper S Sprinkler