137.6443 九、發明說明： 【發明所屬之技術領域】 【0001】 本發明係有關排水箱涵。更詳細而言’係有關可用來將屋內等所產生 之排水支流，與流經屋外等之排水主流匯集之排水箱涵。 【先前技術】 [0002】 截至目前，爲了將屋內等所產生之排水支流，與管線接在屋外等之排 水主流匯集，向來使用排水箱涵。在此排水箱涵內配備了一對主管連接管， 以連接前述排水主流流經之排水主管；以及支管連接管，以連接前述排水 支流流經之排水支管。 截至目前，在配備了前述支管連接管之排水箱涵內，支管連接管之結 構使其可自由轉動，因此提供了可大幅提升與排水支管連接位置自由度之 連接管(專利特許文獻1、2)。 此外，在配備了前述支管連接管之排水箱涵內，支管連接管之結構並 非與排水主流之流動方向呈直角突出，而是斜向突出，因此即使連接空隙 狹小，仍可連接排水支管傳利特許文獻3)。 【專利特許文獻1】實開平3 — 9 3 8 9 0號公報 【專利特許文獻2】實開平6 — 1 8 7 9 1號公報 【專利特許文獻3】實開平6 — 1 2 9 0 0 1號公報 【發明内容】 【發明解決之問題】 【0003】 1376443 然而，採用上述特許文獻1、2之排水箱涵時，出現了一個問題’即 因與水主流之流動方向呈直角突出之支管連接管之突出長度(特許文獻1 之支管15或特許文獻2之連接管(socket)部1 3之突出長度)變長’導致將排 水支流接至排水箱涵之所需連接空隙變大’進而產生無法在狹小空隙內進 ’ 行精簡連接。 此外，採用上述特許文獻1、2之排水箱涵時’還出現了另外兩個問 題，其一是特許文獻1之肘管16或特許文獻2之彎管15之彎曲大，且管徑 φ 固定，導致從排水支流流入排水主流之水流，在急曲直彎之情況下突然變 .得惴急，以致於難以確保平穩流入排水箱涵內；其二是從排水支管流入排 水箱涵之排水，容易逆流到排水主流上流段。 另一方面，採用上述特許文獻3之排水箱涵時’也出現了一個問題’ 即雖然優點在於將排水支流接至排水箱涵之所需連接空隙很小，但因有斜 向構成之支管連接管，雖然可將排水箱涵分成左向或右向使用，排水箱涵 卻無法左右兼用。其中也包括了另一個問題，即如準備之排水箱涵只適用 • 左向或右向，便無法進行配管接線施工，或者須製作並庫存左向和右向兩 種排水箱涵。 【000 4】 有鑑於此，本發明之目的在於提供可提高排水支流與排水箱涵連接位 置自由度，且讓從排水支流流入排水箱涵之水流流動平穩，或可在供排水 支管與排水箱涵連接之狹小空隙進行連接之排水箱涵。 【解決問題的手段】 【0005】 137.6443 爲了達到上述目的，本發明之排水箱涵，係爲在構成仰拱(invert)部之箱 涵主體兩側，設有往外突出之一對主管連接管，用來將上流段與下流段之 排水主管，接至前述仰拱部兩端，且在前述箱涵主體一側，設有用來將排 •水支管接至前述仰拱部中間之支管連接管，此外在前述箱涵主體上方，設 有朝上之檢查管收納用檢查管套管之一種排水箱涵；前述支管連接管，係 由在前述箱涵主體一側所構成之嵌合用環形法蘭，以及在基部開口處外緣 所形成之嵌合用環形接頭，即以可自由轉動方式直接嵌入該嵌合用環形法 • 蘭之肘管所構成，且該肘管之構成，係從頂端開口處經由彎曲部逐漸擴管， 以擴大其曲率半徑，並持續擴管到前述基部開口處爲止，以此爲第1特徵。 此外，本發明之排水箱涵，除了上述第1特徵外，支管連接管之嵌合 用環形法蘭之構成，係利用檢查管套管，將該檢查管套管之下側往內凹， 將向內凹段作爲該嵌合用環形法蘭之環形壁上緣部份，同時嵌合用環形法 蘭之剩餘環形壁從箱涵主體向外突出，且突出長度不超過前述檢查管套管 之口徑，以此構成爲第2特徵。 • 此外，本發明之排水箱涵，除了上述第2特徵外，其構成係一對主管 連接管共用中心軸，同時在檢查管套管之中心軸處於垂直狀態時，前述主 管連接管之中心軸與支管連接管嵌合用環形法蘭之中心軸，將分別處於水 平狀態，且包括主管連接管中心軸與檢查管套管中心軸之平面，以及包括 嵌合用環形法蘭中心軸與檢查管套管中心軸之平面會呈直角狀態，且箱涵 主體上設有一對主管連接管、檢查管套管、支管連接管，以此爲第3特徵。 【發明之效果】 7 [0006] 137.6443 以申請專利第一項所述之排水箱涵來看，因以可自由轉動之方式，將 肘管嵌入在箱涵主體側面所構成之嵌合用環形法蘭，所以排水箱涵之支管 ，連接管，可在肘管轉動之各個位置，與排水支管連接，藉此可大幅提高排 管支管與排水箱涵連接位置自由度。 此外，因所採用之構成，係將肘管直接嵌入在箱涵主體側面所構成之 .嵌合用環形法蘭，所以完全不需要多餘之中間連接件，藉此可減少從箱涵 • 主體往外突之支管連接管之突出長度。 尤其以申請專利範圍第一項所述之排水箱涵來看，構成支管連接管之 时管，因從頂端開口處經由彎曲部逐漸擴管，以擴大其曲率半徑，並持續 擴管到前述基部開口處爲止，所以從排水支管進入肘管之排水，即使水流 往箱涵主體之流動路線彎曲，其其彎曲程度會逐漸降低，藉此可預防流動 方向急驟改變所造成之亂流。此外，因肘管往基部開口處逐步擴管，所以 排水之水流不會積在彎曲部，並可沿著肘管內壁平穩流動，並流入箱涵主 φ 體內之仰拱部。 . 【00 7】 以申請專利範圍第二項所述之排水箱涵來看，除了上述申請專利範圍 第一項所述構成之效果外’構成排水箱涵支管連接管之嵌合用環形法蘭之 構成，係以利用檢查管套管之向內凹段’構成其環形壁之上緣部份’且環 形壁之剩餘部份，不會從前述檢查管套管往週邊突出，因此包括时管’往 支管連接管週邊突出之程度可控制在最低。因此’將排水支管接至排水箱 涵所需之連接空隙，可維持在狹小空間。 [0008] 1376443 以申請專利範圍第三項所述之排水箱涵來看，除了上述申請專利範圍 第一項或第二項所述構成之效果外’設於箱涵主體之一對主管連接管共用 中心軸，同時包括該主管連接管中心軸與檢查管套管中心軸之平面，以及 包括嵌合用環形法蘭中心軸與檢查管套管中心軸之平面會呈直角狀態’因 此，以檢查管套管之中心軸爲中心’使之轉動180度時，可讓前述嵌合用 環形法蘭之位置，達到與主管連接管中心軸左右對稱之狀態。因此，如使 . 用這類排水箱涵，不論排水箱涵左右任一側’皆可適用，並可連接排水支 • 管。 【實施方式】 【發明之最佳實施例】 【0009 】 參照以下圖面，針對本發明實施形態相關之排水箱涵進行說明。 圖一係顯示本發明實施形態相關排水箱涵使用狀態之斜視圖；圖二係 本發明實施形態相關排水箱涵之斜視圖；圖三係本發明實施形態相關排水 φ 箱涵之正面圖；圖四係本發明實施形態相關排水箱涵之左側圖；圖五係本 發明實施形態相關排水箱涵之平面圖；圖六係肘管朝水平方向轉動狀態下 排水箱涵之平面圖；圖七係圖三之A-A斷面圖；圖八係圖三之B—B斷 面圖；圖九係顯示變化例;ξ:排水箱涵正面圖 【0010】 如圖一所示，在排水箱涵1上面，安裝了檢查管2 〇此外，在排水箱涵 1也分別接上了上流段排水主管3、下流段排水主管4。並在排水箱涵1接 上了排水支管5。 (S ) 9 137.6443 上流段排水主管3、下流段排水主管4內爲排水主流。排水支管5內爲 . 屋內等所產生之排水支流，該排水支流在設於屋外等之排水箱涵1內，與 排水主流匯集。 【0011】 如圖二〜圖八所示，排水箱涵1由箱涵主體10、設於該箱涵主體1〇兩 . 側之一對主管連接管20、20同樣設於箱涵主體10 —側之支管連接管30、 . 以及設於箱涵主體10上方之檢查管套管40。 Φ 在排水箱涵1之裝配方式’使檢查管套管40可與地面呈垂直直立之情 況下，前述主管連接管20、20會與地面平行，且前述支管連接管30之基部 會位於箱涵主體10側面，開口與地面呈水平。 【0012】 前述箱涵主體10內設有仰拱部11，從上流段排水主管3接入之排水， 會透過仰拱部11，接著流入下流段排水主管4。 前述一對主管連接管20、20 ,其裝設係用來分別連接排水主管3、4。 • 此對主管連接管20、20之構成，係以180度相對位置設於箱涵主體10兩側， 並分別從兩側向外突出。即此對主管連接管20、20設於同一中心軸X上， 並朝彼此相反方向從前述箱涵主體1〇兩側向外突出。- 一對主管連接管20、20，分別接在前述箱涵主體10之仰拱部11。藉此， 排水主流可從上流段排水主管3，經由主管連接管20、箱涵主體10之仰拱 部11、另一側之主管連接管20，流入下流段排水主管4。 【0013】 137.6443 前述支管連接管30，設於箱涵主體10 —側，位於前述一對主管連接管 20、20間之正中央位置。並以支管連接管30之基部，從一側接至箱涵主體 . 10之仰拱部11中間，且以頂端連接排水支管5。藉此，排水支流可從排水 支管5，經由支管連接管30，在箱涵主體10之仰拱部11內匯集，進而經由 •下淀^段之主管連接管20，流入下流段排水主管4。 【0014】 前述檢查管套管40，以一體化往上突出之形態設於前述箱涵主體10上 φ 方。此檢查管套管4〇從上面接至箱涵主體10之仰拱部11，已安裝檢查管2 時，可透過檢查管3，從上方看到仰拱部11。檢查管套管40之中心軸Z， 與前述一對主管連接管20、20之中心軸X，位於同一平面上，並垂直相交° 換言之，檢查管套管40設於箱涵主體10之正中央正上方位置。當然’此檢 查管套管40亦可設於從箱涵主體10正上方位置稍微偏離之位置(從主管連 接管20之中心軸X稍微偏離之位置）。 檢查管套管40之套管外徑D，大於前述箱涵主體1〇之寬度W(即與箱 # 涵主體10前述主管連接管20之中心軸X垂直之寬度X參照圖四)。藉此’箱 涵主體10之一側連接前述支管連接管3〇之局部12 a (參照圖四)，相對於位 於其上方之檢查管套管40，光以（D _W) / 2之大小，即可深入內部。 【0015】 支管連接管30係由嵌合用環形法蘭31 ’以及以可自由轉動方式直接嵌 入嵌合用環形法蘭31之肘管所構成。 1376443 包括前述嵌合用環形法蘭31之中心軸Y(參照圖四、圖五、圖七），以 及前述檢查管套管40之中心軸Z之平面’與包括前述一對主管連接管20、 20之中心軸X，以及檢查管套管40之中心軸Z之平面呈直角。藉此，以裝 配成垂直狀態之檢查管套管40中心軸Z爲中心’進行180度回轉，嵌合用 環形法蘭31之位置，即可位於以主管連接管20、20中心軸X爲基準之左右 對稱位置。因此，此排水箱涵1與主管連接管20、20連接之左右任一側， 皆可接上排水支管5。 前述嵌合用環形法蘭31，係利用前述檢查管套管40之下側，作爲構成 該嵌合用環形法蘭31之環形壁上緣31 a。即將檢查管套管40之下側往內 凹，構成向內凹段41，以此作爲嵌合用環形法蘭31之一部份。 前述嵌合用環形法蘭31之前述環形壁上緣部份31 a以外之環形壁剩餘 部份，其構成係從箱涵主體10之側面局部12 a向外突出。在此情況下，從 箱涵主體10之側面局部12 a向外突出之長度，不會超過檢查管套管40之 管徑，即不會超出檢查管套管40週邊。 【0016】 此外，肘管32之構成，係從其頂端開口處32 a通過彎曲部32b逐步擴 管，並延伸至基都開口處32 c，以擴大其曲率半徑。更具體而言，肘管32 基部開口處32 c之口徑，與排水主管3、4之口徑相同，例如假設爲1 0 0 mm，則可將頂端開口處32a之口徑設爲直徑7 5 mm。頂端開口處32a 此端之一半管長爲相同口徑，剩下一半管長(彎曲部32b之中間以下)，逐漸 擴大管徑直到32基部開口處32 c爲止。 1376443 之所以將肘管32基部開口處32 c之口徑上限，設定爲排水主管3、4 之口徑，係因不讓支管連接管30之位置過高。如支管連接管30之位置過高， 便無法連接位置較低之排水支管5，因而侷限了排水支管5前端之配管。 前述頂端開口處32 a，與嵌合用環形法蘭31之中心軸Y呈直角開口。 此外，前述彎曲部32 b之彎曲外側，藉由將容易遭受管內排水水流衝 擊之外側，逐漸增大其曲率半徑，不但可防止彎曲部內之排水水流變成亂 流，同時可藉由擴大流動通路，確保彎曲部之實質流動通路面積，以達到 # 確保排水水流平穩之功能。 【0017】 前述肘管32係由其基部開口部外緣32 a之嵌合用環形接頭32 d所構 成。該嵌合用環形接頭32 d，以可自由轉動之方式，直接嵌入嵌合用環形 法蘭31。前述嵌合係利用0形環33等進行緊密嵌合，並採取防脫落等措施， 以防止輕易脫落。 时管32在比前述檢查管套管40外徑更深入內部之位置，直接嵌入嵌合 • 用環形法蘭31，藉此可將從支管連接管週邊向外突出之長度控制在最低， 並可在狹小連接空隙內連接排水支管5。 如上所述，利用檢查管套管40之下側，構成嵌合用環形法蘭31，藉此 可掌控支管連接管30之裝設空間，即使不從主管連接管20之中心軸X之往 旁邊偏移，仍可確保支管連接管30之裝設空間。因此，可讓檢查管套管40 之位置(檢查管2之位置），位於中心軸X正上方，確保排水箱涵1之左右對 稱性，同時確保安裝排水支管5時，提供左右兼用之排水箱涵1〇137.6443 IX. Description of the invention: [Technical field to which the invention pertains] [0001] The present invention relates to a drain tank culvert. More specifically, it is a drainage tank culvert that can be used to collect the drainage tributaries generated in the house and the drainage mains flowing through the house. [Prior Art] [0002] Up to now, in order to collect the drainage tributaries generated in the house and the like, and the mains of the drainage pipes connected to the outside of the pipeline, the drainage tank culvert has been used. A pair of main pipe connecting pipes are arranged in the drain tank culvert to connect the drain main pipe through which the drain main flow flows; and a branch pipe connecting pipe to connect the drain branch pipe through which the drain branch flow flows. Up to now, in the drain culvert equipped with the above-mentioned branch pipe connecting pipe, the structure of the branch pipe connecting pipe is freely rotatable, thereby providing a connecting pipe which can greatly improve the degree of freedom of connection with the drain pipe branch (patent documents 1, 2) ). In addition, in the drainage box culvert equipped with the foregoing branch pipe connecting pipe, the structure of the branch pipe connecting pipe does not protrude at a right angle to the flow direction of the drainage main flow, but protrudes obliquely, so that even if the connection gap is narrow, the drainage branch pipe can be connected to pass the profit. Licensed Document 3). [Patent Proprietary Document 1] Shikaiping 3 - 9 3 8 9 0 [Patent License Document 2] Shikaiping 6 - 1 8 7 9 1 [Public License Document 3] Shikaiping 6 - 1 2 9 0 0 1 No. [Invention] [Problem to Solve the Problem] [0003] 1376443 However, when the drain box culverts of the above-mentioned patent documents 1 and 2 are used, there is a problem that the branch pipe is protruded at right angles to the flow direction of the water main flow. The protruding length of the tube (the protruding length of the branch pipe 15 of the patent document 1 or the socket portion 13 of the patent document 2) becomes longer, resulting in a larger connecting space required to connect the drain branch to the drain tank culvert, thereby generating It is not possible to make a thin connection in a small gap. In addition, there are two other problems in the case of using the drainage box culverts of the above-mentioned Patent Documents 1 and 2, one of which is that the elbow 16 of the Patent Document 1 or the elbow 15 of the Patent Document 2 has a large curvature and the diameter φ is fixed. The flow of water flowing from the drainage tributary into the mainstream of the drainage is suddenly changed in the case of a sharp bend, so that it is difficult to ensure a smooth flow into the drainage tank culvert; the second is that the drainage from the drainage branch into the drainage tank culvert is easy. Countercurrent to the mainstream upper section of the drainage. On the other hand, when the drainage box culvert of the above-mentioned Patent Document 3 is used, 'there is also a problem', that is, although the advantage is that the required connection gap for connecting the drainage branch to the drainage tank culvert is small, but the branch connection is formed by the oblique direction. Although the drainage box culvert can be divided into left or right direction, the drainage box culvert cannot be used both right and left. It also includes another problem, that is, if the prepared drainage box culvert is only applicable to the left or right direction, the piping connection construction cannot be carried out, or the left and right drainage tank culverts must be made and stocked. [000 4] In view of the above, the object of the present invention is to provide a degree of freedom in the connection between the drainage tributary and the drainage box culvert, and to make the flow of water flowing from the drainage tributary into the drainage tank culvert smooth, or in the water supply and drainage branch pipe and the drainage tank A drain box culvert that connects the narrow gaps of the culverts. [Means for Solving the Problem] [0005] 137.6443 In order to achieve the above object, the drain box culvert of the present invention is provided with a pair of main pipe connecting the main pipe on both sides of the main body of the box culvert forming the invert portion. The drainage main pipe for connecting the upper flow section and the lower flow section is connected to the two ends of the inverting arch portion, and the branch pipe connecting pipe for connecting the drainage water branch pipe to the middle of the inverting arch portion is provided on the main body side of the box culvert, Further, above the main body of the box culvert, there is provided a drain box culvert for the inspection tube casing for the inspection tube storage upward; the branch pipe connection pipe is a fitting annular flange formed on the side of the box culvert main body. And a fitting annular joint formed at an outer edge of the base opening, that is, directly rotatably embedded in the elbow of the fitting annular method, and the elbow is formed by bending from the top opening The portion is gradually expanded to enlarge the radius of curvature and continues to expand to the base opening, thereby being the first feature. Further, in addition to the first feature described above, the drain culvert of the present invention comprises the annular flange for fitting the branch pipe connecting pipe, and the lower side of the inspection pipe casing is recessed by the inspection pipe casing. The inner concave portion serves as an upper edge portion of the annular wall of the fitting annular flange, and the remaining annular wall of the fitting annular flange protrudes outward from the box culvert body, and the protruding length does not exceed the diameter of the inspection tube sleeve, This configuration is the second feature. In addition, in addition to the second feature described above, the drain culvert of the present invention is configured such that a pair of main pipe joints share a central axis, and at the same time, when the center axis of the pipe bushing is in a vertical state, the center axis of the main pipe is connected The central axis of the annular flange fitted with the branch pipe connecting pipe will be horizontal, and include the plane of the central pipe of the main pipe and the central axis of the inspection pipe casing, and the central shaft of the annular flange and the casing of the inspection pipe The plane of the central axis is in a right angle state, and the main body of the box culvert is provided with a pair of main pipe, inspection pipe bushing and branch pipe connecting pipe, which is the third feature. [Effects of the Invention] 7 [0006] 137.6443 According to the drainage box culvert described in the first application of the patent application, the fitting annular flange formed by embedding the elbow tube on the side of the main body of the box culvert in a freely rotatable manner Therefore, the branch pipe of the drain tank culvert and the connecting pipe can be connected with the drain branch pipe at various positions where the elbow pipe is rotated, thereby greatly increasing the degree of freedom of connection between the pipe branch pipe and the drain tank culvert. In addition, because of the adopted structure, the elbow tube is directly embedded in the side of the main body of the box culvert. The fitting annular flange is used, so that no unnecessary intermediate connecting member is needed, thereby reducing the protruding from the box culvert and the main body. The branch pipe is connected to the protruding length of the pipe. In particular, in the case of the drain box culvert described in the first paragraph of the patent application, the tube forming the branch pipe is gradually expanded from the top opening through the curved portion to enlarge the radius of curvature and continuously expand to the base portion. Since the opening is closed, the drainage from the drainage branch pipe into the elbow pipe, even if the flow path of the water flowing to the main body of the box culvert is bent, the degree of bending thereof is gradually lowered, thereby preventing the turbulence caused by the sudden change of the flow direction. In addition, since the elbow pipe is gradually expanded toward the opening of the base, the water flow of the drainage does not accumulate in the curved portion, and can smoothly flow along the inner wall of the elbow and flow into the inverting portion of the main body of the box culvert. [00 7] In view of the drainage box culvert described in the second paragraph of the patent application scope, in addition to the effect of the configuration described in the first item of the above-mentioned patent application scope, the fitting annular flange of the connection pipe of the drainage tank culvert is formed. The structure is formed by using the inward concave portion ' of the inspection tube sleeve to constitute the upper edge portion of the annular wall and the remaining portion of the annular wall does not protrude from the inspection tube sleeve to the periphery, thus including the time tube' The degree of protrusion to the periphery of the branch pipe can be controlled to a minimum. Therefore, the connection gap required to connect the drain branch to the drain tank can be maintained in a small space. [0008] 1376443 In view of the drainage box culvert described in the third paragraph of the patent application scope, in addition to the effect of the composition described in the first or second aspect of the above-mentioned patent application, the one of the main body of the box culvert is connected to the main pipe. Sharing the central shaft, including the plane of the central axis of the main pipe and the central axis of the inspection pipe casing, and the plane including the center axis of the fitting annular flange and the center axis of the inspection pipe casing are at right angles. When the central axis of the sleeve is centered to rotate 180 degrees, the position of the fitting annular flange can be made to be bilaterally symmetrical with the central axis of the main pipe. Therefore, if such a drain tank culvert is used, it can be applied regardless of the left and right sides of the drain tank culvert, and the drain branch can be connected. [Embodiment] [Best Embodiment of the Invention] [0009] A drain tank culvert according to an embodiment of the present invention will be described with reference to the following drawings. 1 is a perspective view showing a state in which a drain tank culvert according to an embodiment of the present invention is used; FIG. 2 is a perspective view of a drain tank culvert according to an embodiment of the present invention; and FIG. 3 is a front view of a drain φ box culvert according to an embodiment of the present invention; The left side view of the drainage box culvert according to the embodiment of the present invention; FIG. 5 is a plan view of the drainage box culvert according to the embodiment of the present invention; and FIG. 6 is a plan view of the drainage box culvert in the horizontal direction of the elbow tube; FIG. AA cross-sectional view; Figure 8 is a B-B cross-sectional view of Figure 3; Figure 9 shows a variation; ξ: Drainage tank culvert front view [0010] As shown in Figure 1, on the drain tank culvert 1, install In addition, the inspection pipe 2 is also connected to the drainage section culvert 1 and the upper section drainage main pipe 3 and the downstream section drainage main pipe 4. A drain branch pipe 5 is connected to the drain tank culvert 1. (S) 9 137.6443 The drainage main pipe 3 of the upper flow section and the drainage main pipe 4 of the lower flow section are the mainstream of drainage. The drainage branch pipe 5 is a drainage tributary generated in the house or the like, and is distributed in the drainage tank culvert 1 installed outside the house, and is collected in the drainage main flow. [0011] As shown in FIG. 2 to FIG. 8 , the drain tank culvert 1 is provided by the box culvert main body 10 and the main body of the box culvert body 1 . The side branch pipe connecting pipe 30, and the inspection pipe sleeve 40 disposed above the box culvert body 10. Φ In the case of the assembly mode of the drain tank culverts 'the inspection tube sleeve 40 can be vertically erected with the ground, the above-mentioned main pipe connecting pipes 20, 20 will be parallel to the ground, and the base of the branch pipe connecting pipe 30 will be located in the box culvert On the side of the main body 10, the opening is horizontal to the ground. [0012] The box culvert main body 10 is provided with an inverting arch portion 11, and the drain water connected from the upper stream drain main pipe 3 passes through the inverting arch portion 11, and then flows into the downflow portion drain main pipe 4. The pair of main pipe connecting pipes 20, 20 are connected to the drain main pipes 3, 4, respectively. • The pair of main pipe connecting pipes 20 and 20 are disposed on opposite sides of the box culvert main body 10 at a relative position of 180 degrees, and protrude outward from both sides. That is, the main pipe connecting pipes 20, 20 are provided on the same central axis X, and protrude outward from both sides of the casing culvert main body 1 in opposite directions to each other. - A pair of main pipe connecting pipes 20, 20 are respectively connected to the inverting portion 11 of the box culvert main body 10. Thereby, the drain main flow can flow from the upstream section drain main pipe 3, through the main pipe connecting pipe 20, the inverting arch portion 11 of the box culvert main body 10, and the main pipe connecting pipe 20 on the other side to the downflow section drain main pipe 4. [0013] 137.6443 The branch pipe connecting pipe 30 is disposed on the side of the box culvert main body 10 and located at a center position between the pair of main pipe connecting pipes 20 and 20. The base portion of the pipe connecting pipe 30 is connected from one side to the middle of the box culvert body 10, and the drain branch pipe 5 is connected at the top end. Thereby, the drainage branch flow can be collected from the drainage branch pipe 5 via the branch pipe connecting pipe 30, in the inverting portion 11 of the box culvert main body 10, and further flowed into the downflow section drainage main pipe 4 via the main pipe connecting pipe 20 of the lower stage. [0014] The inspection tube sleeve 40 is provided on the φ side of the box culvert body 10 in such a manner as to protrude upward. The inspection tube sleeve 4 is connected to the inverting portion 11 of the box culvert body 10 from above, and when the inspection tube 2 is attached, the inspection tube 3 can be passed through, and the inverting portion 11 is seen from above. The central axis Z of the tube sleeve 40 is in the same plane as the central axis X of the pair of main tube connecting tubes 20, 20, and intersects perpendicularly. In other words, the tube sleeve 40 is disposed at the center of the box culvert body 10. Directly above. Of course, the inspection tube sleeve 40 may be provided at a position slightly deviated from the position directly above the box culvert main body 10 (a position slightly deviated from the central axis X of the main tube connection tube 20). The casing outer diameter D of the pipe casing 40 is inspected to be larger than the width W of the casing culvert main body 1 (i.e., the width X perpendicular to the central axis X of the main pipe connecting pipe 20 of the casing # 涵 main body 10, see Fig. 4). Thereby, one side of the box culvert body 10 is connected to the portion 12 a of the branch pipe connecting pipe 3 (refer to FIG. 4), and the light is (D _W) / 2 with respect to the inspection pipe sleeve 40 located above it. You can go deep inside. The branch pipe connecting pipe 30 is composed of a fitting annular flange 31' and an elbow pipe which is rotatably fitted directly into the fitting annular flange 31. 1376443 includes a central axis Y of the aforementioned fitting annular flange 31 (refer to FIG. 4, FIG. 5, FIG. 7), and a plane "of the central axis Z of the inspection tube sleeve 40" and the pair of main pipe connecting pipes 20, 20 The central axis X, and the plane of the central axis Z of the inspection tube sleeve 40, are at right angles. Thereby, the center axis Z of the inspection tube sleeve 40 assembled in a vertical state is rotated 180 degrees, and the position of the fitting annular flange 31 can be located based on the central axis X of the main pipe connecting pipes 20 and 20. Symmetrical position. Therefore, the drainage branch pipe 5 can be connected to either side of the drain tank culvert 1 and the main pipe connecting pipes 20 and 20. The fitting annular flange 31 is formed by the lower side of the inspection tube sleeve 40 as the annular wall upper edge 31 a constituting the fitting annular flange 31. Immediately, the underside of the tube sleeve 40 is inwardly recessed to form an inwardly concave portion 41 as part of the fitting annular flange 31. The remaining portion of the annular wall other than the annular wall upper edge portion 31a of the fitting annular flange 31 is formed to protrude outward from the side portion 12a of the box culvert main body 10. In this case, the length protruding outward from the side portion 12a of the side of the box culvert body 10 does not exceed the diameter of the inspection tube sleeve 40, i.e., does not extend beyond the circumference of the inspection tube sleeve 40. Further, the elbow 32 is formed by gradually expanding from the top end opening 32a through the curved portion 32b and extending to the base opening 32c to enlarge the radius of curvature thereof. More specifically, the diameter of the base 32c of the elbow 32 is the same as that of the drain mains 3, 4. For example, if it is 100 mm, the diameter of the top opening 32a can be set to a diameter of 75 mm. The top opening 32a has one half pipe length of the same end, and the remaining half pipe length (below the middle of the curved portion 32b) gradually enlarges the pipe diameter until the 32 base opening 32 c. 1376443 The upper limit of the diameter of the base 32c of the elbow 32 is set to the diameter of the drain mains 3, 4 because the position of the branch connecting pipe 30 is not too high. If the position of the branch pipe 30 is too high, the drain pipe 5 having a lower position cannot be connected, and thus the pipe at the front end of the branch pipe 5 is limited. The front end opening 32a is open at right angles to the central axis Y of the fitting annular flange 31. In addition, the curved outer side of the curved portion 32b is gradually increased in radius of curvature by being easily subjected to the outer side of the drainage water flow in the tube, thereby preventing the drainage water flow in the curved portion from becoming turbulent and expanding the flow path. Ensure the effective flow path area of the bend to achieve the function of ensuring smooth drainage flow. The elbow 32 is constituted by a fitting annular joint 32d of the outer opening 32a of the base opening. The fitting annular joint 32d is directly fitted into the fitting annular flange 31 so as to be rotatable. The chimerism is closely fitted by the O-ring 33 or the like, and measures such as falling off are taken to prevent easy peeling off. The time tube 32 is directly embedded in the fitting flange ring 31 at a position deeper than the outer diameter of the inspection tube sleeve 40, thereby minimizing the length of the protrusion from the periphery of the branch tube connection, and The drain branch pipe 5 is connected in a narrow connection gap. As described above, the lower side of the inspection tube sleeve 40 is used to constitute the fitting annular flange 31, whereby the installation space of the branch pipe connection pipe 30 can be controlled, even if it is not offset from the center axis X of the main pipe connection pipe 20 The movement of the branch pipe connecting pipe 30 can still be ensured. Therefore, the position of the inspection tube sleeve 40 (the position of the inspection tube 2) can be positioned directly above the central axis X, ensuring the left-right symmetry of the drainage tank culvert 1, and at the same time ensuring that the drainage tank 5 is provided when the drainage branch pipe 5 is installed. Han 1
13 【0018】 137.6443 圖二〜圖七顯示將肘管32朝上配置並可轉動之狀態。相對於此，圖八 顯示將时管32橫向(水平)配置並可轉動之狀態。可轉動肘管32，調整成適 合與排水支管5連接之角度。 【0019】 箱涵主體10之仰拱部11內，連接之支管連接管30之仰拱部份11 a (參 照圖七)底部，加上幾道從連接管往仰拱部份11 a中央傾斜之斜坡，並順利 接至設於支管連接管30之斜坡。藉此，可確保從排水支管5經由支管連接 • 管30，往仰拱部份11 a中央之排水水流平穩，與排水主流匯集。 【0020】 圖九係顯示排水箱涵變化例之正面圖。在此變化例中，在主管連接管 20內，利用與上流段排水主管3連接之上流用主管連接管20 a，以及與下 流段排水主管4連接之下流用主管連接管20 b，形成落差。即利用上流用 主管連接管20 a與下流用主管連接管20 b，可變化高度，藉此可使從上流 流出之排水介由排水箱涵1，平穩流往下流段，同時可確實防止逆流。欲 φ 利用上流用主管連接管20 a與下流用主管連接管20 b形成落差時，可在箱 涵主體10之仰拱部11內，在中途改加上斜面代替落差。 其他構成同上述圖二〜圖八所示之排水箱涵構成。 已利用上流用主管連接管20 a與下流用主管連接管20 b形成落差時， 因排水箱涵1之對稱性消失，所以無法排水支管5之安裝無法左右位置兼 用。 【圖式簡單說明】 【0 0 2 1] 14 137.6443 圖一係本發明排水箱涵實例使用狀態的斜視圖。 圖二係本發明實施例排水箱涵的斜視圖。 圖三係本發明實施例排水箱涵的正視圖。 圖四係本發明實施例排水箱涵的左視圖。 圖五係本發明實施例排水箱涵的平面圖。 圖六係本發明排水箱涵之肘管水平方向回轉狀態的平面圖。 圖七係圖三的A-A斷面圖。 φ 圖八係圖三的B—B斷面圖。 圖九本發明排水箱涵變形例的正面圖。 【主要元件符號說明】 【0022】 1 .........排水箱涵 2 .........檢查管 3 .........排水主管 4 ..........排水主管 5 .........排水主管 10 ........箱涵主體 11 ........仰拱部 12a.......管連接管30之局部 2 0........主管連接管 2 0a.......上流用主管連接管 20b.......下流用主管連接管 1513 [0018] 137.6443 Figure 2 to Figure 7 show the state in which the elbow 32 is placed upward and is rotatable. In contrast, Fig. 8 shows a state in which the tube 32 is laterally (horizontal) arranged and rotatable. The elbow 32 can be rotated to adjust the angle to which the drain branch 5 is attached. [0019] In the inverting portion 11 of the box culvert body 10, the connecting branch pipe connects the bottom portion of the inverting portion 11a (refer to FIG. 7) of the pipe 30, and adds several paths from the connecting pipe to the center of the inverting portion 11a. The slope is smoothly connected to the slope provided on the branch pipe 30. Thereby, it is ensured that the pipe 30 is connected from the drain branch pipe 5 via the branch pipe, and the drainage water flowing to the center of the inverting arch portion 11 a is smooth and collected with the drain main flow. [0020] Fig. 9 is a front view showing a variation of the drain tank culvert. In this modification, in the main pipe connecting pipe 20, the upper main pipe connecting pipe 20a is connected to the upper pipe discharging main pipe 3, and the main pipe connecting pipe 20b is connected to the lower flowing water main pipe 4 to form a drop. That is, the upper main pipe connecting pipe 20a and the main pipe connecting pipe 20b for downstream flow can be changed in height, whereby the drain water flowing out from the upper flow can be smoothly flowed to the downstream portion through the drain tank culvert 1, and the backflow can be surely prevented. When it is desired to use φ with the upstream main pipe connecting pipe 20 a and the downstream main pipe connecting pipe 20 b to form a drop, a slope may be added to the inverting portion 11 of the box culvert main body 10 instead of the drop. The other configuration is the same as that of the drain box culvert shown in the above-mentioned FIG. 2 to FIG. When the upstream main pipe connecting pipe 20a and the downstream main pipe connecting pipe 20b are used to form a drop, the symmetry of the drain tank culvert 1 disappears, so that the installation of the drain pipe 5 cannot be used in a left-right position. BRIEF DESCRIPTION OF THE DRAWINGS [0 0 2 1] 14 137.6443 Fig. 1 is a perspective view showing an example of the use state of the drain tank culvert of the present invention. Figure 2 is a perspective view of a drain box culvert according to an embodiment of the present invention. Figure 3 is a front elevational view of a drain tank culvert of an embodiment of the present invention. Figure 4 is a left side view of the drain box culvert of the embodiment of the present invention. Figure 5 is a plan view of a drain box culvert of an embodiment of the present invention. Figure 6 is a plan view showing the horizontal direction of the elbow of the drain box culvert of the present invention. Figure 7 is a cross-sectional view of the A-A of Figure 3. φ Figure 8 is a B-B section view of Figure 3. Figure 9 is a front elevational view showing a modification of the drain tank culvert of the present invention. [Description of main component symbols] [0022] 1 .........Drainage tank culvert 2 .........Inspection pipe 3 .........Drainage supervisor 4 ... .......Drainage Supervisor 5 .........Drainage Supervisor 10 ........Box Culvert Body 11 ........Inverted Arch 12a.... ...the part of the pipe connecting pipe 30 2 0........the main pipe connecting pipe 2 0a.......the main pipe connecting pipe 20b....the main pipe connecting pipe 15