JPH10325482A - Air valve - Google Patents
Air valveInfo
- Publication number
- JPH10325482A JPH10325482A JP13655997A JP13655997A JPH10325482A JP H10325482 A JPH10325482 A JP H10325482A JP 13655997 A JP13655997 A JP 13655997A JP 13655997 A JP13655997 A JP 13655997A JP H10325482 A JPH10325482 A JP H10325482A
- Authority
- JP
- Japan
- Prior art keywords
- rubber ring
- air valve
- cylindrical portion
- diameter
- valve box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Valve Housings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、下部に耐震性取
付構造部を有して送水管に設置され、通水の際には管内
からの排気を、送水管から排水する際には管内への給気
を、さらに管内が加圧された満水状態で水中から分離し
た空気やガスを排出する空気弁に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply pipe having a seismic mounting structure at a lower portion thereof. The present invention relates to an air valve for discharging air and gas separated from water in a full water state where the inside of a pipe is further pressurized.
【０００２】[0002]
【従来の技術】従来、空気弁については多くの技術が開
示されている。例えば、図８に示すものは日本工業規格
に制定されている JIS B 2063 水道用単口空気弁であ
る。この空気弁51は送水管52の上部に穿孔された取付孔
53に補修弁（止水栓）54を介して装着された弁箱55を有
し、該弁箱の下端開口56が送水管52内と連通し、弁箱55
内に収納された昇降自在で弁体の役割をする見かけ比重
１以下のフロート57が弁箱55内の水位の変動に連動して
昇降し、弁箱55の上端開口を閉鎖する上蓋58の中央部に
固定された弾性弁座59に設けた空気孔60を開閉するよう
になっている。前記した空気弁51の送水管52への取付に
際しては弁箱55の下端開口小径部に先端が小径になるよ
うにテーパ状に設けたおねじ61を送水管52の取付孔53に
送水管52の外周側が大径となるようにテーパ状に設けた
めねじ62に螺合させている。2. Description of the Related Art Conventionally, many techniques have been disclosed for an air valve. For example, the one shown in FIG. 8 is a JIS B 2063 single-port air valve for water supply established in Japanese Industrial Standards. This air valve 51 is a mounting hole drilled at the top of the water pipe 52.
53 has a valve box 55 attached via a repair valve (water stopcock) 54, and the lower end opening 56 of the valve box communicates with the inside of the water pipe 52, and the valve box 55
A float 57 having an apparent specific gravity of 1 or less, which can be raised and lowered and functions as a valve body, is lifted and lowered in accordance with the fluctuation of the water level in the valve box 55, and closes the upper end opening of the valve box 55. An air hole 60 provided in an elastic valve seat 59 fixed to the section is opened and closed. When the air valve 51 is attached to the water pipe 52, a male screw 61 having a tapered shape at the lower end opening small diameter portion of the valve box 55 so that the tip has a small diameter is attached to the mounting hole 53 of the water pipe 52. Is screwed to a screw 62 so as to be provided in a tapered shape so that the outer peripheral side thereof has a large diameter.
【０００３】ところで、前記のようにして取付けられた
従来の空気弁51においては、送水管52に対してテーパ状
ねじ螺合で片持ち支持による取付形態を有し、その螺合
量は限られた送水管52の管厚みに左右され、特に送水管
52の管厚みが薄いと螺合量は少なくなり取付強度に影響
する。またこのような空気弁51は重心位置が比較的高い
ため、空気弁51に衝撃などの外部的負荷を受けた際や、
地震その他の原因で送水管52の管路に振動が生ずると慣
性の作用で空気弁51の揺れを伴い、取付の緩みや取付部
に曲げの力が集中し、ねじ螺合部における漏水の原因や
該部におけるおねじ61，めねじ62の損傷で取付部が離脱
する恐れがある。Meanwhile, the conventional air valve 51 mounted as described above has a mounting configuration in which the water supply pipe 52 is mounted in a cantilever manner with a tapered screw thread, and the screwing amount is limited. Depends on the thickness of the water pipe 52.
If the pipe thickness of 52 is thin, the amount of screwing will be small and will affect the mounting strength. Also, since such an air valve 51 has a relatively high center of gravity, when the air valve 51 receives an external load such as an impact,
If vibration occurs in the pipe of the water pipe 52 due to an earthquake or other causes, the inertia causes the air valve 51 to sway, and loosening of the mounting or bending force concentrates on the mounting part, causing water leakage at the threaded part. The mounting portion may be detached due to damage of the male screw 61 and the female screw 62 in the portion.
【０００４】[0004]
【発明が解決しようとする課題】そこでこの発明は、前
記のような従来の問題点を解決し、空気弁の送水管に対
する取付部におけるねじ螺合部を無くして該部の緩みや
漏水および離脱の恐れがない耐震性取付構造部を有する
空気弁を提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and eliminates the screwing portion in the mounting portion of the air valve to the water supply pipe, thereby loosening, leaking and separating the portion. It is an object of the present invention to provide an air valve having a quake-resistant mounting structure that is free from fear of occurrence.
【０００５】[0005]
【課題を解決するための手段】前記目的を達成するた
め、請求項１の発明は、弁箱本体と、該本体の底部に連
設される小径筒部とからなる上下端開口の弁箱を具え、
この弁箱の小径筒部の下端開口を送水管に穿孔された取
付孔に送水管内と連通して装着した空気弁において、弁
箱の少なくとも小径筒部を薄肉中空筒状金具で形成し、
この筒状金具からなる小径筒部の外周にゴム輪及びゴム
輪押えを嵌合して装着し、このゴム輪は上端部に外向き
環状フランジ部を有するとともに、下端部に内向きに突
出した環状突部を有し、ゴム輪及びゴム輪押えを装着し
た小径筒部をゴム輪のフランジ部が送水管の外周面に圧
接し、ゴム輪押えがフランジ部を上方から押さえるよう
に送水管の取付孔に圧入嵌合して装着し、小径筒部の下
端部の内面をゴム輪の環状突部が反転されて外向きとな
り送水管の内面に圧接するようにその外径が取付孔より
大きい凸状湾曲面の拡径部に形成したことを特徴とす
る。In order to achieve the above object, an invention according to claim 1 is to provide a valve box having upper and lower openings formed by a valve box main body and a small-diameter cylindrical portion connected to the bottom of the main body. Yes,
In the air valve mounted at the lower end opening of the small-diameter cylindrical portion of the valve box in communication with the inside of the water pipe to the mounting hole perforated in the water pipe, at least the small-diameter cylindrical portion of the valve box is formed of a thin hollow cylindrical metal fitting,
A rubber ring and a rubber ring retainer are fitted and mounted on the outer periphery of the small-diameter cylindrical portion made of this cylindrical metal fitting, and this rubber ring has an outwardly directed annular flange portion at an upper end portion and protrudes inward at a lower end portion. The water pipe has an annular protruding part, and the rubber ring and the small-diameter cylindrical part equipped with the rubber ring retainer are pressed against the outer peripheral surface of the water pipe by the flange part of the rubber ring, and the rubber ring retainer presses the flange part from above. The fitting is press-fitted into the mounting hole, and the inner surface of the lower end of the small-diameter cylindrical portion is turned outward with the annular projection of the rubber ring inverted so that its outer diameter is larger than the mounting hole so as to press against the inner surface of the water pipe. It is characterized in that it is formed on the enlarged diameter portion of the convex curved surface.
【０００６】請求項２の発明は、請求項１において、弁
箱本体の底部が、ゴム輪押えを上方から押さえるように
なっている。請求項３の発明は、請求項１又は２におい
て、ゴム輪押えが、その外周側にゴム輪のフランジ部の
外周面に係合する下向きフランジを有している。請求項
４の発明は、請求項１ないし３のいずれかに記載のゴム
輪押えに代え、小径筒部の外周にゴム輪押えが一体に設
けられている。請求項５の発明は、請求項１ないし４の
いずれかにおいて、小径筒部が弁箱本体と別体となって
おり、該筒部と弁箱本体の間に止水栓を収納したケーシ
ングが、その上端が弁箱本体の下端と接続され、かつ下
端が小径筒部の上端と一体に接続されて配設されてい
る。According to a second aspect of the present invention, in the first aspect, the bottom of the valve box main body presses the rubber ring presser from above. According to a third aspect of the present invention, in the first or second aspect, the rubber ring retainer has a downward flange on an outer peripheral side thereof for engaging with an outer peripheral surface of a flange portion of the rubber ring. According to a fourth aspect of the present invention, instead of the rubber ring presser according to any one of the first to third aspects, a rubber ring presser is integrally provided on the outer periphery of the small-diameter cylindrical portion. According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the small-diameter cylindrical portion is separate from the valve box main body, and the casing housing the water stopcock between the cylindrical portion and the valve box main body is provided. The upper end is connected to the lower end of the valve box main body, and the lower end is integrally connected to the upper end of the small-diameter tubular portion.
【０００７】[0007]
【発明の実施の形態】この発明の実施の形態を図面を参
照して説明する。図１は第１の実施形態を示す耐震性取
付構造部を有する空気弁が送水管の取付孔に装着された
状態の縦断正面図である。１は空気弁で、上下端開口の
薄肉状筒状金具からなる弁箱２を具えている。筒状金具
からなる弁箱２はステンレスのプレス加工からなる一体
成形ものとなっていて、弁箱本体３と、該本体の底部に
一体に連設されている小径中空筒部４とからなってい
る。中空筒部４の外周にはゴム輪５及びゴム輪押え６が
嵌合して装着され、これらゴム輪５及びゴム輪押え６が
装着された状態で送水管７に穿孔された取付孔８に圧入
嵌合して装着され、かつ中空筒部４の下端部の内面が凸
状湾曲面の拡径部９に形成されている。中空筒部４の拡
径部９の内面はその外径が取付孔８の径より大きくなっ
ており、かつその外縁は送水管７の内面近くに位置して
いる。ゴム輪５は上端部に外向き環状フランジ部11が設
けられ、下端部に内向きに突出した環状突部12が設けら
れている。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional front view showing a state in which an air valve having an earthquake-resistant mounting structure according to a first embodiment is mounted in a mounting hole of a water pipe. Reference numeral 1 denotes an air valve, which has a valve box 2 made of a thin cylindrical metal fitting with upper and lower openings. The valve box 2 made of a cylindrical metal fitting is integrally formed by pressing stainless steel, and comprises a valve box main body 3 and a small-diameter hollow cylindrical portion 4 integrally connected to the bottom of the main body. I have. A rubber ring 5 and a rubber ring retainer 6 are fitted and mounted on the outer periphery of the hollow cylindrical portion 4, and the rubber ring 5 and the rubber ring retainer 6 are attached to the mounting hole 8 formed in the water pipe 7 in a state where the rubber ring 5 and the rubber ring retainer 6 are mounted. The inner surface of the lower end portion of the hollow cylindrical portion 4 is press-fitted and mounted, and an inner diameter portion 9 having a convex curved surface is formed. The outer diameter of the inner surface of the enlarged diameter portion 9 of the hollow cylindrical portion 4 is larger than the diameter of the mounting hole 8, and the outer edge thereof is located near the inner surface of the water pipe 7. The rubber ring 5 is provided with an outwardly-facing annular flange portion 11 at an upper end portion, and an inwardly projecting annular projection portion 12 at a lower end portion.
【０００８】取付孔８への装着に際して、ゴム輪５の環
状フランジ部11は取付孔８の周辺の送水管７の外周面に
圧接し、環状突部12は拡径部９の形成により外向きにさ
れる。ゴム輪押え６は外周縁に下向きフランジ13を有
し、このフランジ13が取付孔８への装着に際してゴム輪
５のフランジ部11の上端外周面に係合してこれを保持
し、フランジ部11を上方から押えるようになっている。
この実施形態ではゴム輪押え６はその上面が中央部から
周縁部に向けて上向き傾斜に形成され、弁箱本体３の底
部において同様に上向き傾斜に形成された底面と面接触
可能になっている。At the time of mounting in the mounting hole 8, the annular flange portion 11 of the rubber ring 5 presses against the outer peripheral surface of the water pipe 7 around the mounting hole 8, and the annular projection 12 faces outward by forming the enlarged diameter portion 9. To be. The rubber ring presser 6 has a downward flange 13 on the outer peripheral edge. The flange 13 engages with and holds the upper peripheral surface of the upper end of the flange portion 11 of the rubber ring 5 when the rubber ring 5 is attached to the mounting hole 8. From above.
In this embodiment, the upper surface of the rubber ring presser 6 is formed so as to be inclined upward from the central portion to the peripheral portion, and the bottom surface of the valve box main body 3 can be brought into surface contact with a similarly formed inclined bottom surface. .
【０００９】前記においては、その取付前の状態を示す
図２(イ)から明らかのように弁箱２の中空筒部４の外径
ｄはゴム輪５の上端開口部に形成したゴム輪５の内径ａ
よりやや大径の案内部14の内径ｅよりもわずかに大きく
なっており、また取付孔８の口径ｃはゴム輪５の胴部の
外径ｂよりわずかに大きくなっている。In the above, the outer diameter d of the hollow cylindrical portion 4 of the valve box 2 is set at the upper end opening of the rubber ring 5 as is apparent from FIG. Inner diameter a
The inner diameter e of the slightly larger guide portion 14 is slightly larger than the inner diameter e, and the diameter c of the mounting hole 8 is slightly larger than the outer diameter b of the body of the rubber ring 5.
【００１０】図３は弁箱２の中空筒部４の下端部を拡径
部９に形成するための拡径治具を示す。この拡径治具15
は上端が開口し、かつ底部が下向き傾斜のテーパ面16に
形成された軸孔17を有し、該軸孔のテーパ面16と対向す
る前周壁にフック部材突出用窓18が切欠形成された主軸
20と、この主軸20の軸孔17に上下動可能に嵌合された可
動軸22と、この可動軸22の下端二又部にピン23で軸線に
対し所定角度傾動可能に枢支され、可動軸22の下動によ
り主軸20のテーパ面16を摺動して傾動し成形面25を窓18
から外方に突出するフック部材26とからなっている。軸
孔17は主軸20の中心に対して若干後方に偏心した位置に
穿けられ、窓18のある周壁が窓18と反対側の周壁よりも
厚肉になっていて強い曲げ力に耐えられるようになって
いる。窓18と反対側の後ろ周壁には別の窓27が切欠形成
されている。FIG. 3 shows a diameter increasing jig for forming the lower end of the hollow cylindrical portion 4 of the valve box 2 into the enlarged diameter portion 9. This expanding jig 15
The upper end has an opening, and the bottom has a shaft hole 17 formed in a tapered surface 16 inclined downward, and a hook member projecting window 18 is cut out in a front peripheral wall facing the tapered surface 16 of the shaft hole. Spindle
20, a movable shaft 22 fitted in the shaft hole 17 of the main shaft 20 so as to be movable up and down, and a lower end bifurcated portion of the movable shaft 22 pivotally supported by a pin 23 so as to be tiltable at a predetermined angle with respect to the axis by a movable When the shaft 22 moves downward, the tapered surface 16 of the main shaft 20 slides and tilts to form the forming surface 25 into the window 18.
And a hook member 26 protruding outward from the hook member 26. The shaft hole 17 is drilled at a position slightly eccentric with respect to the center of the main shaft 20 so that the peripheral wall with the window 18 is thicker than the peripheral wall on the opposite side of the window 18 and can withstand a strong bending force. Has become. Another window 27 is cut out on the rear peripheral wall opposite to the window 18.
【００１１】主軸20の上端部外周面には別途ハンドルを
取付けるためのスプライン41が形成され、その上端には
可動軸22の上端おねじに螺合した調整ナット42を固定す
る袋ナット43用のねじ44が可動軸22の軸孔17と同心に形
成されている。調整ナット42は前記のように可動軸22の
上端おねじに螺合して緩めたり締め付けたりすることに
より可動22の上下動位置を調整する。袋ナット43は可動
軸22を上下動するときは取り外されており、フック部材
26が位置決められた傾動状態で取り付けられ、可動軸22
と主軸20をロックする役目をする。同時にフック部材26
の上端も可動軸22の下端の膨大部28に押圧され固定され
る。また、スプライン41より下方の主軸20の外周面には
図示しない昇降部材とねじ嵌合する昇降用ねじ45が形成
されている。可動軸22の外径は窓18の周方向の幅よりも
大きくなっている。A spline 41 for separately attaching a handle is formed on an outer peripheral surface of an upper end portion of the main shaft 20. An upper end of the spline 41 is used for a cap nut 43 for fixing an adjusting nut 42 screwed to an upper male screw of the movable shaft 22. A screw 44 is formed concentrically with the shaft hole 17 of the movable shaft 22. The adjustment nut 42 adjusts the vertical movement position of the movable 22 by screwing and loosening or tightening the upper end male screw of the movable shaft 22 as described above. The cap nut 43 is removed when moving the movable shaft 22 up and down, and the hook member
26 is installed in a tilted position with the movable shaft 22
And serves to lock the spindle 20. At the same time hook member 26
Of the movable shaft 22 is also pressed and fixed by the enlarged portion 28 at the lower end of the movable shaft 22. An elevating screw 45 is formed on the outer peripheral surface of the main shaft 20 below the spline 41 to be screw-fitted to an elevating member (not shown). The outer diameter of the movable shaft 22 is larger than the width of the window 18 in the circumferential direction.
【００１２】拡径治具15は図示しない拡径装置に装着さ
れ、拡径治具15の上下動、可動軸22の上下動及び拡径治
具15の回転、かつ微小上下動などは該装置により作動す
る。The diameter increasing jig 15 is mounted on a diameter expanding device (not shown), and the vertical movement of the diameter expanding jig 15, the vertical movement of the movable shaft 22, the rotation of the diameter expanding jig 15, and the minute vertical movement are performed by the device. Operated by
【００１３】空気弁１を送水管７に取り付ける手順を以
下に説明する。図２(イ)のように配備した送水管７、ゴ
ム輪５、ゴム輪押え６、空気弁１の弁箱２において、拡
径治具15を挿入した弁箱２の中空筒部４に下方からゴム
輪押え６を嵌め込むとともに、ゴム輪５を預ける（同図
(ロ)）。次に、前記した拡径装置を操作して弁箱２及び
拡径治具15を同時下降し、ゴム輪５の下端部から取付孔
８に徐々に挿入すると、送水管７の外周面にそのフラン
ジ部11が当接する（同図(ハ)）。なおも弁箱２と拡径治
具15を降ろすと、ゴム輪５の案内部14に中空筒部４が押
し込まれてゴム輪５の下端面より突出し、送水管７の外
周面とゴム輪押え６を介して弁箱本体３の底部との間で
ゴム輪５のフランジ部11が強く押圧される（同図
(ニ)）。The procedure for attaching the air valve 1 to the water pipe 7 will be described below. In the water pipe 7, rubber ring 5, rubber ring retainer 6, and valve box 2 of the air valve 1 arranged as shown in FIG. The rubber ring retainer 6 is inserted from the
(B)). Next, by operating the above-described diameter expanding device, the valve box 2 and the diameter expanding jig 15 are simultaneously lowered and gradually inserted from the lower end of the rubber ring 5 into the mounting hole 8. The flange portion 11 comes into contact (FIG. 3C). Further, when the valve box 2 and the diameter increasing jig 15 are lowered, the hollow cylindrical portion 4 is pushed into the guide portion 14 of the rubber ring 5 and protrudes from the lower end surface of the rubber ring 5, and the outer peripheral surface of the water supply pipe 7 and the rubber ring retainer are pressed. 6, the flange 11 of the rubber ring 5 is strongly pressed between the bottom of the valve body 3 and the bottom thereof.
(D)).
【００１４】これによりゴム輪５の環状突部12がそれま
での内向きから外向きに反転し、また、ゴム輪５の圧入
によりゴム輪５と取付孔８の口縁間および取付孔８の内
周面間、ゴム輪５と中空筒部４の外周面間のシールが保
たれる。このとき、拡径治具15の主軸20の下端部は中空
筒部４の下端面より少し出ている。As a result, the annular projection 12 of the rubber ring 5 is turned from the inside toward the outside to the outside, and the press-fitting of the rubber ring 5 causes the gap between the rubber ring 5 and the edge of the mounting hole 8 and the gap between the mounting hole 8. The seal between the inner peripheral surfaces and between the outer peripheral surfaces of the rubber ring 5 and the hollow cylindrical portion 4 is maintained. At this time, the lower end of the main shaft 20 of the diameter increasing jig 15 is slightly protruded from the lower end surface of the hollow cylindrical portion 4.
【００１５】次に、主軸20を回転させながら降ろし、フ
ック部材26のピン23が中空筒部４の下端面よりも下にな
るようにする。しかる後、調整ナット42を緩めて可動軸
22を下動し始めると、フック部材26はテーパ面16を滑り
ながら降下し、図３(イ)のように窓18から突出した状態
で停止する。その後、可動軸22の上部の調整ナット42を
袋ナット43で固定する。これによりフック部材26が窓18
から突出して固定かつ傾動状態が保たれる。Next, the main shaft 20 is lowered while rotating, so that the pin 23 of the hook member 26 is lower than the lower end surface of the hollow cylindrical portion 4. Then, loosen the adjustment nut 42 and move the movable shaft
When the hook member 26 starts to move downward, the hook member 26 descends while sliding on the tapered surface 16 and stops while projecting from the window 18 as shown in FIG. After that, the adjustment nut 42 on the upper part of the movable shaft 22 is fixed with the cap nut 43. As a result, the hook member 26 is
, And the fixed and tilted state is maintained.
【００１６】次に、主軸20を反対方向に回転させながら
上げ、フック部材26の成形面25が中空筒部４の下端面に
接するようにする。しかる後、拡径装置でフック部材26
が窓18から突出した拡径治具15は小さい上下動を繰り返
しながら上動かつ回転することにより、中空筒部４の下
端面は徐々に拡径され、ラッパ状の拡径部９になる（図
４(イ)，（ロ））。このラッパ状の拡径部９に成形され
た中空筒部４の下端部の外径は送水管７の取付孔８の口
径よりも大きくなっている。この拡径に際し、小刻みに
上下動（かつ回動・上動）する主軸20に配置されたフッ
ク部材26の成形面25からのプレスを受ける中空筒部４の
下端部の内面は、ゴム輪５の下端部の環状突部12を内
包、かつ管内面へ押圧するように拡径部９に、その上部
が座屈することなく容易に形成される。Next, the main shaft 20 is raised while being rotated in the opposite direction, so that the molding surface 25 of the hook member 26 is in contact with the lower end surface of the hollow cylindrical portion 4. After a while, the hook member 26 is
The jig 15 projecting from the window 18 moves upward and rotates while repeating small up and down movements, so that the lower end surface of the hollow cylindrical portion 4 is gradually enlarged to become a trumpet-shaped enlarged portion 9 ( (Fig. 4 (a), (b)). The outer diameter of the lower end of the hollow cylindrical portion 4 formed in the trumpet-shaped enlarged diameter portion 9 is larger than the diameter of the mounting hole 8 of the water pipe 7. When the diameter is increased, the inner surface of the lower end of the hollow cylindrical portion 4 that is pressed from the molding surface 25 of the hook member 26 disposed on the main shaft 20 that moves up and down in small increments (and rotates and moves up and down) is a rubber ring 5. The upper portion of the enlarged diameter portion 9 is easily formed without buckling so as to include the annular projection 12 at the lower end of the tube and press against the inner surface of the tube.
【００１７】拡径が終わると拡径治具15を下げ、袋ナッ
ト43を緩め、可動軸22を引き上げフック部材26を軸孔17
内に収納し、調整ナット42を締め、拡径治具15を引き上
げる。そして弁箱２内に図１に示すようにフロートなど
をセットし上蓋を取り付け空気弁１を通常構成のものに
する。When the diameter expansion is completed, the diameter expansion jig 15 is lowered, the cap nut 43 is loosened, the movable shaft 22 is raised, and the hook member 26 is inserted into the shaft hole 17.
Then, the adjusting nut 42 is tightened, and the expanding jig 15 is pulled up. Then, a float or the like is set in the valve box 2 as shown in FIG. 1, an upper cover is attached, and the air valve 1 has a normal configuration.
【００１８】前記のように送水管７の取付孔８に装着さ
れた空気弁１は、その取付形態が螺合によるものではな
くなり、弁箱２の中空筒部４の下端部の内面をその外径
が取付孔８より大きくなるように凸状湾曲面にした拡径
部９に形成しているため、緩みや漏水の恐れがなく、拡
径部９により取付孔８からの抜け出し力に対しても強い
ものとなり、まさに下部に耐震性取付構造部を有したも
のとなる。As described above, the air valve 1 mounted in the mounting hole 8 of the water pipe 7 is not mounted by screwing, and the inner surface of the lower end portion of the hollow cylindrical portion 4 of the valve box 2 is moved to the outside. Since it is formed in the enlarged diameter portion 9 having a convex curved surface so that the diameter is larger than the mounting hole 8, there is no possibility of loosening or water leakage. , Which has an earthquake-resistant mounting structure at the bottom.
【００１９】図５は第２の実施形態を示し、この実施形
態においては中空筒部４の上端部外周にゴム輪押え６ａ
を一体に固設しており、これ以外の構成は第１の実施形
態と同じである。このような実施形態においても前記し
た第１の実施形態と同様な作用効果が期待できる。FIG. 5 shows a second embodiment. In this embodiment, a rubber ring presser 6a is provided on the outer periphery of the upper end of the hollow cylindrical portion 4.
Are integrally fixed, and the other configuration is the same as that of the first embodiment. In such an embodiment, the same operation and effect as in the first embodiment can be expected.
【００２０】図６は第３の実施形態を示し、この実施形
態においては従来技術と同様に補修弁（止水栓）47を介
在させたものであり、止水栓47のボール状弁体48を内蔵
する外殻（ケーシング）49とその下部において縮径して
一体的に延伸した中空筒部４をステンレス製の加工品と
し、外殻49の縮径部より下方において送水管７への取付
孔８に対しては第１の実施形態と同様の取り付けを行な
う。図７(イ)，(ロ)は第１の実施の形態における図４
(イ)，(ロ)に相当する作用図である。FIG. 6 shows a third embodiment. In this embodiment, a repair valve (water stopcock) 47 is interposed similarly to the prior art, and a ball-shaped valve element 48 of the water stopcock 47 is provided. The outer shell (casing) 49 containing the inside and the hollow cylindrical portion 4 which is reduced in diameter and integrally extended at the lower portion thereof are made of stainless steel, and are attached to the water supply pipe 7 below the reduced diameter portion of the outer shell 49. The same mounting as in the first embodiment is performed on the hole 8. FIGS. 7A and 7B show FIGS. 4A and 4B in the first embodiment.
It is an action figure corresponding to (a) and (b).
【００２１】[0021]
【発明の効果】この発明は前記のように構成からなり、
送水管の取付孔に対する空気弁の下部の取付部形態が、
従来のようなねじ螺合による取付部でなく、ゴム輪を介
して取付孔に圧入した中空筒部の下端を拡径部に形成す
る耐震性取付構造部であるため、次のような優れた効果
が期待できる。すなわち、 （１）空気弁に衝撃などの外部的負荷を受けた際や、送
水管の揺れに伴い慣性の作用で空気弁に傾動の力が働い
ても、ゴム輪の弾性力で許容することができ、取付部に
おける緩みや取付部を破壊する応力は発生せず、漏水の
原因を防止することができる。 （２）空気弁に抜出し力が働いた場合、拡径部の外径が
取付孔の内径よりも大きいので、拡径部が変形または破
断するまで抜出し力に耐える。 （３）中空筒部が取付孔に挿入されたゴム輪を押し広げ
て圧入され、拡径部でゴム輪下端部の環状突部を内包か
つ管内面へ押圧しているので、該環状突部の押圧部によ
り及び取付孔の口縁の高さ（管外周の円弧による）の差
に関係なく、ゴム輪と取付孔の内周面及びゴム輪と中空
筒部の外周面との間の面圧が均等でシール機構に不安が
ない。 （４）第１，２の実施形態は、弁箱本体と小径筒部がス
テンレスの成形品であり、弁箱（外装）を軽量にするこ
とができるので、地震等による弁に及ぼす慣性力を小さ
くできる。The present invention has the above-described configuration,
The mounting part form of the lower part of the air valve with respect to the mounting hole of the water pipe is
It is an earthquake-resistant mounting structure that forms the lower end of the hollow cylindrical part press-fitted into the mounting hole through a rubber ring, instead of the conventional screw-in mounting part, so that it has the following excellent features. The effect can be expected. That is, (1) Even if an external load such as impact is applied to the air valve, or if the tilting force acts on the air valve due to the inertia due to the sway of the water pipe, the elastic force of the rubber ring should allow it. Therefore, looseness in the mounting portion and stress that breaks the mounting portion are not generated, and the cause of water leakage can be prevented. (2) When a pulling force acts on the air valve, the outer diameter of the enlarged diameter portion is larger than the inner diameter of the mounting hole. (3) Since the hollow cylindrical portion pushes and expands the rubber ring inserted into the mounting hole and presses the annular projection at the lower end portion of the rubber ring into the pipe inner surface by the enlarged diameter portion, the annular projection is pressed. Surface between the rubber ring and the inner peripheral surface of the mounting hole and between the rubber ring and the outer peripheral surface of the hollow cylindrical portion irrespective of the difference in the height of the rim of the mounting hole (due to the arc of the outer circumference of the pipe) due to the pressing portion of the The pressure is even and there is no worry about the sealing mechanism. (4) In the first and second embodiments, the valve box main body and the small-diameter cylindrical portion are formed of stainless steel, and the valve box (exterior) can be reduced in weight. Can be smaller.
【図１】この発明の第１の実施形態を示す空気弁が送水
管の取付孔に装着された状態の縦断正面図である。FIG. 1 is a vertical sectional front view showing a state in which an air valve according to a first embodiment of the present invention is mounted in a mounting hole of a water pipe.
【図２】(イ)〜(ニ)は同上の取付手順を示す作用図であ
る。FIGS. 2 (a) to 2 (d) are action diagrams showing a mounting procedure of the above.
【図３】拡径治具を示し、(イ)はその縦断正面図、(ロ)
は側面図、(ハ)は底面図である。FIG. 3 shows a diameter expansion jig, (a) is a longitudinal front view thereof, (b)
Is a side view, and (c) is a bottom view.
【図４】(イ)，(ロ)は作用説明用の要部断面図である。FIGS. 4A and 4B are main-portion cross-sectional views for explaining the operation.
【図５】第２の実施形態を示す空気弁が送水管の取付孔
に装着された状態の縦断正面図である。FIG. 5 is a longitudinal sectional front view showing a state in which an air valve according to a second embodiment is attached to a mounting hole of a water pipe.
【図６】第３の実施形態を示す空気弁が送水管の取付孔
に装着された状態の縦断正面図である。FIG. 6 is a longitudinal sectional front view showing a state in which an air valve according to a third embodiment is attached to a mounting hole of a water pipe.
【図７】(イ)，(ロ)は第３の実施形態の作用説明用の要
部断面図である。FIGS. 7 (a) and 7 (b) are cross-sectional views of a principal part for describing an operation of the third embodiment.
【図８】従来の空気弁が送水管の取付孔に装着された状
態の縦断正面図である。FIG. 8 is a vertical sectional front view showing a state in which a conventional air valve is mounted in a mounting hole of a water pipe.
１ 空気弁 ２ 弁箱 ３ 弁箱本体 ４ 中空筒部 ５ ゴム輪 ６，６ａ ゴム輪押え ７ 送水管 ８ 取付孔 ９ 拡径部 11 環状フランジ部 12 環状突部 13 下向きフランジ 14 案内部 15 拡径治具 47 補修弁（止水弁） 48 ボール状弁体 49 外殻（ケーシング） DESCRIPTION OF SYMBOLS 1 Air valve 2 Valve box 3 Valve box main body 4 Hollow cylinder part 5 Rubber ring 6, 6a Rubber ring retainer 7 Water pipe 8 Mounting hole 9 Large diameter section 11 Annular flange section 12 Annular projection 13 Downward flange 14 Guide section 15 Large diameter Jig 47 Repair valve (water stop valve) 48 Ball-shaped valve element 49 Outer shell (casing)
Claims (5)
小径筒部とからなる上下端開口の弁箱を具え、この弁箱
の小径筒部の下端開口を送水管に穿孔された取付孔に送
水管内と連通して装着した空気弁において、 前記弁箱の少なくとも小径筒部を薄肉中空筒状金具で形
成し、この筒状金具からなる小径筒部の外周にゴム輪及
びゴム輪押えを嵌合して装着し、このゴム輪は上端部に
外向き環状フランジ部を有するとともに、下端部に内向
きに突出した環状突部を有し、前記ゴム輪及びゴム輪押
えを装着した小径筒部をゴム輪のフランジ部が送水管の
外周面に圧接し、ゴム輪押えがフランジ部を上方から押
さえるように送水管の取付孔に圧入嵌合して装着し、小
径筒部の下端部の内面をゴム輪の環状突部が反転されて
外向きとなり送水管の内面に圧接するようにその外径が
取付孔より大きい凸状湾曲面の拡径部に形成したことを
特徴とする空気弁。1. A valve box having an upper and lower end opening comprising a valve box main body and a small-diameter cylindrical portion connected to the bottom of the main body, and a lower end opening of the small-diameter cylindrical portion of the valve box is bored in a water pipe. In the air valve mounted in communication with the inside of the water pipe through the mounting hole, at least the small-diameter cylindrical portion of the valve box is formed of a thin-walled hollow cylindrical fitting, and a rubber ring and rubber are provided around the small-diameter cylindrical portion formed of the cylindrical fitting. This rubber ring has an outwardly directed annular flange at the upper end and an inwardly projecting annular projection at the lower end, and is fitted with the rubber ring and the rubber ring retainer. The rubber ring flange is pressed against the outer peripheral surface of the water supply pipe, and the rubber ring retainer is pressed into the mounting hole of the water supply pipe so that the rubber ring retainer presses the flange from above. The inner surface of the lower end is turned outward with the annular protrusion of the rubber ring turned over, Air valve, wherein contact manner that the outer diameter was formed in the enlarged diameter portion of the large convex curved surface from the mounting hole.
ら押さえるようになっている請求項１記載の空気弁。2. The air valve according to claim 1, wherein a bottom portion of the valve box main body presses the rubber ring presser from above.
ランジ部の外周面に係合する下向きフランジを有してい
る請求項１又は２記載の空気弁。3. The air valve according to claim 1, wherein the rubber ring retainer has a downward flange on an outer peripheral side thereof, the downward flange engaging with an outer peripheral surface of a flange portion of the rubber ring.
ム輪押えに代え、小径筒部の外周にゴム輪押えが一体に
設けられている空気弁。4. An air valve comprising a rubber ring retainer integrally provided on the outer periphery of a small-diameter cylindrical portion instead of the rubber ring retainer according to claim 1.
り、該筒部と弁箱本体の間に止水栓を収納したケーシン
グが、その上端が弁箱本体の下端と接続され、かつ下端
が小径筒部の上端と一体に接続されて配設されている請
求項１ないし４のいずれかに記載の空気弁。5. A casing in which a small-diameter cylindrical portion is separate from a valve box main body, and a casing containing a water stopcock between the cylindrical portion and the valve box main body has an upper end connected to a lower end of the valve box main body. The air valve according to any one of claims 1 to 4, wherein a lower end is integrally connected to an upper end of the small-diameter cylindrical portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13655997A JPH10325482A (en) | 1997-05-27 | 1997-05-27 | Air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13655997A JPH10325482A (en) | 1997-05-27 | 1997-05-27 | Air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10325482A true JPH10325482A (en) | 1998-12-08 |
Family
ID=15178073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13655997A Pending JPH10325482A (en) | 1997-05-27 | 1997-05-27 | Air valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10325482A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015215014A (en) * | 2014-05-09 | 2015-12-03 | 株式会社ニフコ | Valve device |
-
1997
- 1997-05-27 JP JP13655997A patent/JPH10325482A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015215014A (en) * | 2014-05-09 | 2015-12-03 | 株式会社ニフコ | Valve device |
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