JP2011047467A - Sprinkler unwinding piping - Google Patents

Sprinkler unwinding piping Download PDF

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Publication number
JP2011047467A
JP2011047467A JP2009196188A JP2009196188A JP2011047467A JP 2011047467 A JP2011047467 A JP 2011047467A JP 2009196188 A JP2009196188 A JP 2009196188A JP 2009196188 A JP2009196188 A JP 2009196188A JP 2011047467 A JP2011047467 A JP 2011047467A
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Japan
Prior art keywords
nipple
inner diameter
pipe
rotating
flexible tube
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JP2009196188A
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JP4906896B2 (en
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Ichiro Kawabata
市郎 川端
Yoshiaki Minamide
善昭 南出
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NIKKO METAL KK
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NIKKO METAL KK
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Priority to JP2009196188A priority Critical patent/JP4906896B2/en
Priority to KR1020100027076A priority patent/KR101702662B1/en
Priority to CN201010143172.6A priority patent/CN102003580B/en
Publication of JP2011047467A publication Critical patent/JP2011047467A/en
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
    • F16L33/26—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses specially adapted for hoses of metal

Abstract

<P>PROBLEM TO BE SOLVED: To provide sprinkler unwinding piping which reduces the number of components while dispensing with a sleeve member and a pulling-off preventing ring. <P>SOLUTION: A first and a second expanded diameter thread parts 2a, 2b of which outer diameters are larger than the inner diameter of a rotation nipple 5 and are smaller than the tip root diameter of a tapered external thread 7 of the rotation nipple 5 are formed by crushing a first thread part 2a and a second thread part 2b of a most tip of a flexible pipe 4. A rear surface side of the second expanded diameter thread part 2b is made to abut on the tip surface 5a of the rotation nipple 5. Rubber seal rings 10, 11 are fitted in a first root 3a and a second root 3b of the flexible pipe 4, respectively. Moreover, aligning rings 12, 13 are fitted in a third root 3c arranged on the flexible pipe tip side of the first root 2a and a fourth root 3d arranged on the flexible pipe rear side of the second root 2b, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は給水管とスプリンクラーヘッドとの間を接続するスプリンクラー巻き出し配管に関する。   The present invention relates to a sprinkler unwinding pipe that connects between a water supply pipe and a sprinkler head.

この種のスプリンクラー巻き出し配管としては、例えば、所要長さの可撓性の巻き出し管の先端部（上流側端）に給水管側の分岐継手に接続するためのユニオン式の袋ナットを装着し（例えば、特許文献１，２参照。）、後端部（下流側端）にスプリンクラーヘッド取付管を接続したもの（例えば、前出の特許文献２参照。）があるが、これでは袋ナットに螺合させる特別なニップルが必要とされる。   As this type of sprinkler unwinding pipe, for example, a union-type cap nut for connecting to a branch joint on the water supply pipe side is attached to the distal end (upstream end) of a flexible unwinding pipe of the required length. (For example, refer to Patent Documents 1 and 2), but there is a sprinkler head mounting pipe connected to the rear end (downstream end) (for example, refer to the above-mentioned Patent Document 2). A special nipple that is screwed onto is required.

近年、かかる特殊ニップルを不要にすべく回転型ニップルを可撓性の巻き出し管（フレキシブル管）の給水管接続側端に装着したものが多く見られるようになった（例えば、特許文献３，４参照。）。   In recent years, in order to eliminate the need for such special nipples, a lot of rotating nipples are attached to the end of the flexible unwinding pipe (flexible pipe) on the water supply pipe connection side (for example, Patent Document 3, 4).

特開平６−２３５４８４号公報JP-A-6-235484 特開平７−２１３６４０号公報JP-A-7-213640 特開２００５−２７９２００号公報JP 2005-279200 A 特開平９−２９４８２２号公報JP-A-9-294822

しかしながら、回転型ニップルを装着した上記スプリンクラー巻き出し配管では、巻き出し管の給水管接続側端に金属製スリーブ部材（特許文献３）又は樹脂製のスリーブ部材（特許文献４）を溶接又は樹脂一体成形により一体的に結合し、このスリーブ部材の外周にシールリング及び抜止めリングを介して回転型ニップルを外嵌するという構造を採用するため、スリーブ部材及び抜止めリングを必要とし、これ又部材点数並びに組立工数の増大を招くという問題があった。   However, in the above-described sprinkler unwinding pipe equipped with a rotary nipple, a metal sleeve member (Patent Document 3) or a resin sleeve member (Patent Document 4) is welded or resin-integrated to the feed pipe connection side end of the unwinding pipe. In order to employ a structure in which the rotary nipple is externally fitted to the outer periphery of the sleeve member via a seal ring and a retaining ring, the sleeve member and the retaining ring are required. There was a problem that the number of points and assembly man-hours were increased.

本発明は、このような問題点を解消するためになされたものであり、その目的とするところは、フレキシブル管からなる巻き出し管の山・谷部を利用するという簡単な構成で回転ニップルとの間でのシールリングによるシール性と回転ニップルの抜止めを確保し得るうえに、前出の特許文献３，４のごときスリーブ部材や抜止めリングを不要とし、部材点数の減少、コストの低減を図れるスプリンクラー巻き出し配管を提供することにある。   The present invention has been made in order to solve such problems, and the object of the present invention is to provide a rotating nipple with a simple configuration that uses a peak / valley portion of an unwinding pipe made of a flexible pipe. As well as ensuring sealing performance and sealing of the rotating nipple between the sleeves, the sleeve member and retaining ring as in Patent Documents 3 and 4 are not required, reducing the number of members and cost. It is providing the sprinkler unwinding piping which can aim at.

本発明は、請求項１に記載のように、その発明の内容を理解しやすくするために図１〜図２に付した符号を参照して説明すると、フレキシブル管４と、このフレキシブル管４の先端部に外嵌される回転ニップル５とを備え、回転ニップル５はこれの先端部の外周に先窄まり状のテーパ雄ねじ７を設けており、フレキシブル管４の最先端部の第１山部２ａ及びこれに隣接する第２山部２ｂを押しつぶして回転ニップル５の内径よりも大きくかつ回転ニップル５のテーパ雄ねじ７の先端谷径（最小外径）よりも小さい外径の第１，２拡径山部２ａ，２ｂを形成し、この第２拡径山部２ｂの後面側を回転ニップル５の先端面５ａに、直接またはワッシャーあるいは第３山部も押しつぶして形成した第３拡径山部等何らかの介在物を介在させて当接させるものである。そして、フレキシブル管４の回転ニップル５で覆われる領域における一つの第１の谷部３ａと、この第１の谷部３ａよりフレキシブル管後方側に配置するもう一つの第２の谷部３ｂにそれぞれそれら第１，２谷部３ａ，３ｂと回転ニップル５の内周との間をシールするゴム製のシールリング１０，１１を嵌め込んでおり、さらに第１の谷部３ａよりフレキシブル管先端側に配置する第３の谷部３ｃと第２の谷部３ｂよりフレキシブル管後方側に配置する第４の谷部３ｄにそれぞれ調心リング１２，１３を嵌め込んでいることに特徴を有するものである。   As described in claim 1, the present invention will be described with reference to the reference numerals attached to FIGS. 1 to 2 for easy understanding of the contents of the invention. The rotary nipple 5 is fitted on the distal end portion, and the rotary nipple 5 is provided with a tapered male screw 7 tapered on the outer periphery of the distal end portion thereof. 2a and the second crest portion 2b adjacent thereto are crushed so that the first and second expansions have an outer diameter larger than the inner diameter of the rotating nipple 5 and smaller than the tip trough diameter (minimum outer diameter) of the tapered male screw 7 of the rotating nipple 5. The third enlarged diameter crest formed by forming the diameter crests 2a and 2b and crushing the rear surface side of the second enlarged diameter crest 2b directly or the washer or the third crest on the front end surface 5a of the rotary nipple 5. Etc. Is shall. And in the 1st trough part 3a in the field covered with rotation nipple 5 of flexible pipe 4, and another 2nd trough part 3b arranged on the back side of a flexible pipe from this 1st trough part 3a, respectively The rubber seal rings 10 and 11 for sealing between the first and second troughs 3a and 3b and the inner periphery of the rotary nipple 5 are fitted, and further on the distal end side of the flexible tube from the first trough 3a. It is characterized in that alignment rings 12 and 13 are fitted in the third valley portion 3c and the fourth valley portion 3d arranged on the rear side of the flexible tube from the second valley portion 3b. .

上記構成によると、回転ニップル５の内径よりも大きい外径をもつ第２拡径山部２ｂの後面側は回転ニップル５の先端面５ａに当接させているので、抜止めリング等を用いることなく、回転ニップル５がフレキシブル管４の管軸方向前方へ移動して抜け出るのを防止できる。その際、第１，２拡径山部２ａ，２ｂは回転ニップル５のテーパ雄ねじ７の先端谷径（最小外径）よりも小さい外径に形成してあるので、回転ニップル５のテーパ雄ねじ７を給水管側の分岐継手にねじ込み接続するのに障害となるようなことがない。また、回転ニップル５の先端面５ａに当接させる第１，２拡径山部２ａ，２ｂは二重構造にしているので強度アップでき、それだけ抜止めの確実性を高めることができる。   According to the above configuration, the rear surface side of the second enlarged diameter crest 2b having an outer diameter larger than the inner diameter of the rotating nipple 5 is in contact with the tip surface 5a of the rotating nipple 5, so that a retaining ring or the like is used. Therefore, the rotating nipple 5 can be prevented from moving forward in the tube axis direction of the flexible tube 4 and coming out. At this time, the first and second enlarged diameter crests 2a and 2b are formed to have an outer diameter smaller than the tip root diameter (minimum outer diameter) of the taper male screw 7 of the rotary nipple 5, and therefore the taper male screw 7 of the rotary nipple 5 is formed. Is not obstructed when screwed into the branch joint on the water supply pipe side. Further, since the first and second diameter-expanded crests 2a and 2b brought into contact with the front end surface 5a of the rotary nipple 5 have a double structure, the strength can be increased, and the certainty of retaining can be increased accordingly.

また、第１の谷部３ａ及び第２の谷部３ｂにそれぞれそれら第１，２谷部３ａ，３ｂと回転ニップル５の内周との間をシールするゴム製のシールリング１０，１１を嵌め込むとともに、これらシールリング１０，１１の前後に調心リング１２，１３を配置することにより、調心リング１２，１３による自動調心作用によりフレキシブル管４のがたつきを有効に防止できるため、回転ニップル５の内部でフレキシブル管４が内封水圧で斜めになる等して径方向にがたついてシールリング１０，１１が第１，２谷部３ａ、３ｂからはみ出して内封水が漏れ出るのを有効確実に防止できる。   Further, rubber seal rings 10 and 11 for sealing between the first and second valley portions 3a and 3b and the inner periphery of the rotating nipple 5 are fitted into the first valley portion 3a and the second valley portion 3b, respectively. In addition, by arranging the aligning rings 12 and 13 before and after these seal rings 10 and 11, it is possible to effectively prevent rattling of the flexible tube 4 due to the self-aligning action by the aligning rings 12 and 13, Inside the rotary nipple 5, the flexible tube 4 is slanted in the radial direction by the inner sealing water pressure, etc., and the seal rings 10 and 11 protrude from the first and second valley portions 3 a and 3 b, and the inner sealing water leaks out. Can be prevented effectively.

請求項１記載のスプリンクラー巻き出し配管は、請求項２に記載のように、回転ニップル５の内径部８の後端口は内径部８よりもさらに大きくくり広げて拡大後端口８ａに形成し、これら内径部８と拡大後端口８ａとの間に段部９を形成しており、回転ニップル５の拡大後端口８ａの内部に対応する位置にあるフレキシブル管４の第３山部２ｃを押しつぶして回転ニップル５の内径部８の内径よりも大きい外径の第３拡径山部２ｃを形成し、この第３拡径山部２ｃを拡大後端口８ａ内に突出させるという構成を採用することができる。   In the sprinkler unwinding pipe according to claim 1, as described in claim 2, the rear end port of the inner diameter portion 8 of the rotary nipple 5 is further widened than the inner diameter portion 8 to form an enlarged rear end port 8 a. A step portion 9 is formed between the portion 8 and the enlarged rear end port 8a, and the third ridge 2c of the flexible tube 4 at a position corresponding to the inside of the enlarged rear end port 8a of the rotating nipple 5 is crushed to rotate the nipple. It is possible to adopt a configuration in which a third enlarged ridge portion 2c having an outer diameter larger than the inner diameter of the inner diameter portion 8 is formed, and the third enlarged ridge portion 2c protrudes into the enlarged rear end port 8a.

このような構成によると、抜止めリング等を用いることなく、回転ニップル５がフレキシブル管４の管軸方向後方へ移動してフレキシブル管４の先端側領域から後方へ外れ出ることのないように移動規制できる。   According to such a configuration, without using a retaining ring or the like, the rotating nipple 5 moves rearward in the tube axis direction of the flexible tube 4 so that it does not come out rearward from the distal end side region of the flexible tube 4. Can be regulated.

本発明によれば、フレキシブル管と回転ニップルとの間でのシールリングによるシール性と回転ニップルの抜止めを確保し得るうえに、前出の特許文献３，４のごときスリーブ部材や抜止めリングを不要とするため、部材点数の減少、コストの低減を図れ、また特許文献３のごときスリーブ部材の溶接作業を省くこともできるという利点がある。   According to the present invention, it is possible to ensure sealing performance between the flexible pipe and the rotating nipple and to prevent the rotating nipple from being removed, as well as the sleeve member and the retaining ring as described in Patent Documents 3 and 4 above. Therefore, there is an advantage that the number of members can be reduced and the cost can be reduced, and the welding work of the sleeve member as in Patent Document 3 can be omitted.

本発明の一実施例を示すスプリンクラー巻き出し配管の半欠截断面図である。It is a half notched sectional view of a sprinkler unwinding pipe showing an embodiment of the present invention. 図１におけるＡ部の拡大図である。It is an enlarged view of the A section in FIG.

以下、本発明の好適な実施形態を図面に基づき説明する。   Preferred embodiments of the present invention will be described below with reference to the drawings.

図１に示すように、本発明に係るスプリンクラー巻き出し配管１は、円周方向全周に延びる山部２と谷部３とを管軸方向へ交互に並設したステンレス等金属製のフレキシブル管４と、このフレキシブル管４の先端部（上流側端）に外嵌され図外の給水管側の分岐継手の雌ねじ部にねじ込み接続されるステンレス等金属製の回転ニップル５と、フレキシブル管４の後端部（下流側端）に溶接ｗにより一体結合され図外のスプリンクラーヘッドの雄ねじ部にねじ込み接続されるステンレス等金属製の直線形あるいはベンド形状のレジューサー管６とを備えている。   As shown in FIG. 1, a sprinkler unwinding pipe 1 according to the present invention is a flexible pipe made of metal such as stainless steel, in which crests 2 and troughs 3 extending in the circumferential direction are alternately arranged in parallel in the pipe axis direction. 4, a rotating nipple 5 made of a metal such as stainless steel that is externally fitted to the distal end (upstream end) of the flexible pipe 4 and screwed into a female thread portion of a branch joint on the water supply pipe side (not shown), A straight or bend-shaped reducer pipe 6 made of metal such as stainless steel is integrally connected to the rear end portion (downstream end) by welding w and screwed to a male screw portion of a sprinkler head (not shown).

図１、図２に示すように、回転ニップル５は先端部の外周に先窄まり状のテーパ雄ねじ７を設けており、回転ニップル５の内径部８の後端口は内径部８よりもさらに大きくくり広げて拡大後端口８ａに形成し、内径部８と拡大後端口８ａとの間に段部９を形成している。   As shown in FIGS. 1 and 2, the rotary nipple 5 is provided with a tapered male screw 7 that is tapered at the outer periphery of the front end portion, and the rear end port of the inner diameter portion 8 of the rotary nipple 5 is larger than the inner diameter portion 8. A step 9 is formed between the inner diameter portion 8 and the enlarged rear end port 8a.

フレキシブル管４の先端側には内面にシリコングリス等の潤滑材を塗付した回転ニップル５を挿入した後、最先端の第１山部２ａとこの第１山部２ａに隣接する第２山部２ｂを拡径する。第１，２山部２ａ，２ｂの拡径加工は図外の拡径装置で第１，２山部２ａ，２ｂの内径を所定量だけ拡大して押しつぶすことで行なわれる。このように拡径された第１，２拡径山部２ａ，２ｂのうち第２拡径山部２ｂの後面側は回転ニップル５の先端面５ａに当接させることで、抜止めリング等を用いることなく、回転ニップル５の抜止めを図る。この場合、第１，２拡径山部２ａ，２ｂの拡径量が小さ過ぎるとフレキシブル管４の内封水圧（例えば、最大５．６ＭＰａ＝引張力約２８０Ｋｇｆ）に対して回転ニップル５が抜け出るし、大き過ぎると回転ニップル５のテーパ雄ねじ７の先端谷径（最小外径）に達して回転ニップル５のテーパ雄ねじ７を図外の給水管側の分岐継手の雌ねじにねじ込み接続するのに障害となる。したがって、第１，２拡径山部２ａ，２ｂの最大外径は回転ニップル５の内径部８の内径よりも十分に大きくかつ回転ニップル５のテーパ雄ねじ７の先端谷径（最小外径）よりも小さく形成する。   The distal end of the flexible tube 4 is inserted with a rotating nipple 5 having a lubricant such as silicon grease applied on the inner surface thereof, and then the first ridge 2a at the forefront and the second ridge adjacent to the first ridge 2a. 2b is expanded. The diameter expansion processing of the first and second peak portions 2a and 2b is performed by expanding and crushing the inner diameters of the first and second peak portions 2a and 2b by a predetermined amount with a diameter expansion device (not shown). Of the first and second expanded ridges 2a and 2b expanded in this way, the rear surface side of the second expanded ridge 2b is brought into contact with the front end surface 5a of the rotating nipple 5 so that a retaining ring or the like is provided. The rotation nipple 5 is prevented from being removed without using it. In this case, if the amount of diameter expansion of the first and second diameter expansion crests 2a, 2b is too small, the rotating nipple 5 comes out with respect to the internal water pressure of the flexible tube 4 (for example, maximum 5.6 MPa = tensile force about 280 kgf). However, if it is too large, the tip root diameter (minimum outer diameter) of the taper male screw 7 of the rotating nipple 5 will be reached, and it will be an obstacle to screw and connect the taper male screw 7 of the rotating nipple 5 to the female thread of the branch joint on the water supply pipe side outside the figure. It becomes. Therefore, the maximum outer diameter of the first and second diameter-expanded crests 2a and 2b is sufficiently larger than the inner diameter of the inner diameter portion 8 of the rotating nipple 5 and the tip trough diameter (minimum outer diameter) of the tapered male screw 7 of the rotating nipple 5. Also make it small.

図２に示すように、回転ニップル５で覆われるフレキシブル管４の先端側領域における或る一つの谷部、すなわち第１の谷部３ａと、この第１の谷部３ａより一山又は二山以上置いてフレキシブル管後方側に配置するもう一つの第２の谷部３ｂにはそれぞれそれら第１，２谷部３ａ，３ｂと回転ニップル５内周との間で圧縮変形してその間の隙間を密封シールするためのゴム製のシールリング１０，１１を嵌め込む。さらに、第１の谷部３ａよりフレキシブル管先端側に配置する第３の谷部３ｃと第２の谷部３ｂよりフレキシブル管後方側に配置する第４の谷部３ｄにそれぞれ樹脂製又は金属製の調心リング１２，１３を嵌め込む。調心リング１２，１３は各円周一部を切断した欠円形状に形成している。なお、Ｏリングよりなるシールリング１０，１１および調心リング１２，１３が上記のようにフレキシブル管４に装着された後はそれらシールリング１０，１１および調心リング１２，１３の各外周面にはシリコングリス等の潤滑材を塗付することで、回転ニップル５を回転し易くしている。   As shown in FIG. 2, a certain valley in the distal end side region of the flexible tube 4 covered with the rotating nipple 5, that is, the first valley 3 a and one or two peaks from the first valley 3 a. Another second valley 3b placed on the rear side of the flexible tube is compressed and deformed between the first and second valleys 3a, 3b and the inner periphery of the rotary nipple 5 to form a gap therebetween. The rubber seal rings 10 and 11 for hermetically sealing are fitted. Furthermore, the third valley portion 3c arranged on the distal end side of the flexible tube from the first valley portion 3a and the fourth valley portion 3d arranged on the rear side of the flexible tube from the second valley portion 3b are made of resin or metal, respectively. The centering rings 12 and 13 are fitted. The aligning rings 12 and 13 are formed in the shape of a notch obtained by cutting a part of each circumference. After the seal rings 10 and 11 and the aligning rings 12 and 13 made of O-rings are mounted on the flexible tube 4 as described above, the seal rings 10 and 11 and the aligning rings 12 and 13 are provided on the outer peripheral surfaces of the seal rings 10 and 11 and the aligning rings 12 and 13, respectively. Applies a lubricant such as silicon grease to facilitate rotation of the rotary nipple 5.

調心リング１２，１３の自由状態（調心リング１２，１３が拡縮径するように変形されておらず圧縮応力又は引張応力が作用していない状態）における外径は回転ニップル５の内径部８の内径よりも僅かに小さく、かつ、自由状態における内径はフレキシブル管４の第３の谷部３ｃ及び第４の谷部３ｄの谷外径より僅かに小さくして、調心リング１２，１３をフレキシブル管４の第３，４谷部３ｃ，３ｄに装着したとき調心リング１２，１３の内径部が第３，４谷部３ｃ，３ｄの谷外径部に確実に圧接するようにしている。これは、回転ニップル５をフレキシブル管４の先端側部に容易に押し込めるようにするためである。   The outer diameter in the free state of the aligning rings 12 and 13 (the state in which the aligning rings 12 and 13 are not deformed so as to expand and contract and the compressive stress or the tensile stress is not applied) is the inner diameter portion 8 of the rotary nipple 5. The aligning rings 12 and 13 are made slightly smaller than the inner diameter of the first and second inner diameters in the free state and slightly smaller than the outer diameters of the third trough 3c and the fourth trough 3d of the flexible tube 4. When attached to the third and fourth valley portions 3c and 3d of the flexible tube 4, the inner diameter portions of the aligning rings 12 and 13 are surely pressed against the outer diameter portions of the third and fourth valley portions 3c and 3d. . This is because the rotary nipple 5 can be easily pushed into the distal end side portion of the flexible tube 4.

このように調心リング１２，１３をシールリング１０，１１の前後に配置しておくと、図外の給水管側の分岐継手とスプリンクラーヘッドとの間を本スプリンクラー巻き出し配管で接続した状態下で、調心リング１２，１３による自動調心作用によりフレキシブル管４のがたつきを有効に防止できるため、回転ニップル５の内部でフレキシブル管４が内封水圧で斜めになる等して径方向にがたついてシールリング１０，１１が第１，２谷部３ａ，３ｂからはみ出して内封水が漏れるのを有効確実に防止できる。   When the aligning rings 12 and 13 are arranged before and after the seal rings 10 and 11 as described above, the sprinkler unwinding pipe connects between the branch joint on the water supply pipe side and the sprinkler head (not shown). Since the self-aligning action of the aligning rings 12 and 13 can effectively prevent the flexible pipe 4 from rattling, the flexible pipe 4 is inclined by the internal water pressure inside the rotating nipple 5 in the radial direction. It is possible to effectively and reliably prevent the seal rings 10 and 11 from protruding from the first and second valley portions 3a and 3b and leaking the inner water.

回転ニップル５がフレキシブル管４の管軸方向後方へ移動してフレキシブル管４の先端側領域から管軸方向後方へ外れ出ることのないようにその後方移動を規制するために、回転ニップル５の拡大後端口部８ａの内部に対応する位置にあるフレキシブル管４の一つもしくは二つの第３山部２ｃを押しつぶして回転ニップル５の内径部８の内径よりも大きい外径の第３拡径山部２ｃを形成したうえで、この第３拡径山部２ｃを拡大後端口部８ａ内に突出させる。その際、第２拡径山部２ｂの後面側が回転ニップル５の先端面５ａに当接した状態の下で、回転ニップル５の段部９とフレキシブル管４の第３拡径山部２ｃとの間に僅かな隙間ｓが形成されるようにして、フレキシブル管４が内封水圧により管軸方向に僅かに伸び移動するのを許容している。   In order to restrict the rearward movement of the rotating nipple 5 so that the rotating nipple 5 does not move rearward in the tube axis direction of the flexible tube 4 and escape from the distal end side region of the flexible tube 4 toward the rear in the tube axis direction. A third expanded crest portion having an outer diameter larger than the inner diameter of the inner diameter portion 8 of the rotary nipple 5 by crushing one or two third crest portions 2c of the flexible tube 4 at a position corresponding to the inside of the rear end opening portion 8a. After forming 2c, this 3rd diameter expansion peak part 2c is protruded in the expansion rear end part 8a. At that time, the step 9 of the rotating nipple 5 and the third expanded ridge 2c of the flexible tube 4 are in a state where the rear surface side of the second expanded ridge 2b is in contact with the tip surface 5a of the rotating nipple 5. A slight gap s is formed between the flexible pipes 4 to allow the flexible pipe 4 to slightly extend and move in the pipe axis direction due to the internal water pressure.

１ スプリンクラー巻き出し配管
２ａ 第１山部（第１拡径山部）
２ｂ 第２山部（第２拡径山部）
２ｃ 第３山部（第３拡径山部）
３ａ 第１の谷部
３ｂ 第２の谷部
３ｃ 第３の谷部
３ｄ 第４の谷部
４ フレキシブル管
５ 回転ニップル
５ａ 先端面
７ テーパ雄ねじ
８ 回転ニップルの内径部
８ａ 拡大後端口部
９ 段部
１０，１１ シールリング
１２，１３ 調心リング 1 Sprinkler unwinding piping 2a 1st peak part (1st enlarged diameter peak part)
2b Second ridge (second expanded ridge)
2c 3rd mountain part (3rd enlarged diameter mountain part)
3a 1st trough 3b 2nd trough 3c 3rd trough 3d 4th trough 4 flexible tube 5 rotating nipple 5a tip surface 7 taper male screw 8 inner diameter portion of rotating nipple 8a enlarged rear end port 9 stepped portion 10,11 Seal ring 12,13 Alignment ring

Claims (2)

フレキシブル管と、このフレキシブル管の先端部に外嵌される回転ニップルとを備え、前記回転ニップルはこれの先端部の外周に先窄まり状のテーパ雄ねじを設けており、前記フレキシブル管の最先端部の第１山部及びこれに隣接する第２山部を押しつぶして前記回転ニップルの内径よりも大きくかつ前記回転ニップルのテーパ雄ねじの先端谷径よりも小さい外径の第１，２拡径山部を形成し、この第２拡径山部の後面側を前記回転ニップルの先端面に当接させており、前記フレキシブル管の前記回転ニップルで覆われる領域における一つの第１の谷部ともう一つの第２の谷部にそれぞれそれら第１，２谷部と回転ニップル内周との間をシールするゴム製のシールリングを嵌め込んでおり、さらに前記第１の谷部よりフレキシブル管先端側に配置する第３の谷部と、前記第２の谷部よりフレキシブル管後方側に配置する第４の谷部にそれぞれ調心リングを嵌め込んでいることを特徴とする、スプリンクラー巻き出し配管。   A flexible pipe and a rotating nipple fitted on the distal end of the flexible pipe, and the rotating nipple is provided with a tapered taper male thread on the outer periphery of the distal end of the flexible pipe. The first and second expanded crests are crushed by crushing the first crest and the second crest adjacent thereto and having an outer diameter larger than the inner diameter of the rotating nipple and smaller than the tip trough diameter of the tapered male screw of the rotating nipple. And a rear surface side of the second enlarged diameter crest portion is brought into contact with the tip surface of the rotating nipple, and the first trough portion in the region covered with the rotating nipple of the flexible tube and A rubber seal ring that seals between the first and second troughs and the inner periphery of the rotary nipple is fitted in one second trough, and the flexible tube tip side further from the first trough In Characterized in that it fitted the third valley and the second fourth respectively aligning ring valley disposed in the flexible tube rearward from the valley to location, the sprinkler unwinding pipe. 前記回転ニップルの内径部の後端口は内径部よりもさらに大きくくり広げて拡大後端口に形成し、これら内径部と拡大後端口との間に段部を形成しており、前記回転ニップルの拡大後端口部の内部に対応する位置にあるフレキシブル管の第３山部を押しつぶして回転ニップルの内径部の内径よりも大きい外径の第３拡径山部を形成し、この第３拡径山部を拡大後端口部内に突出させている、請求項１記載のスプリンクラー巻き出し配管。   The rear end port of the inner diameter portion of the rotating nipple is further widened than the inner diameter portion to form an enlarged rear end port, and a step portion is formed between the inner diameter portion and the enlarged rear end port. The third crest portion of the flexible tube at a position corresponding to the inside of the end opening is crushed to form a third crest portion having an outer diameter larger than the inner diameter of the inner diameter portion of the rotary nipple. The sprinkler unwinding pipe according to claim 1, wherein the pipe protrudes into the enlarged rear end portion.
JP2009196188A 2009-08-27 2009-08-27 Sprinkler unwinding piping Expired - Fee Related JP4906896B2 (en)

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