JP4794198B2

JP4794198B2 - Water discharge nozzle for fire fighting

Info

Publication number: JP4794198B2
Application number: JP2005115714A
Authority: JP
Inventors: 繁治宮村
Original assignee: 株式会社立売堀製作所
Priority date: 2005-04-13
Filing date: 2005-04-13
Publication date: 2011-10-19
Anticipated expiration: 2025-04-13
Also published as: JP2006288871A

Description

本発明は放水状態を直状放水から拡散放水へと連続的に変化させることができる消火用放水ノズルに関するものである。 The present invention relates to a fire-fighting water discharge nozzle capable of continuously changing a water discharge state from straight water discharge to diffusion water discharge.

従来からこの種の消火用ノズルとしては、図７に示すように、放水筒本体20の前部外周面に前端部を放水口22に形成し且つ該放水口22の内周面に環状の弁座部23を設けてなる操作筒体21を前後方向に進退自在に螺合させていると共に、この操作筒体21内の中心部に後端部が上記放水筒本体20の前端中心部内に固定され且つ前端にデフレクタ24を一体に取り付けてなる固定軸体25を配設し、上記操作筒体21を螺進させて上記弁座部23を上記デフレクタ24の後面に圧着させることにより放水を閉止状態にし、操作筒体21を螺退させて上記弁座部23を上記デフレクタ24から後方に離間させることによって放水筒本体20内からの圧力水を固定軸体20の外周面と弁座部23との間の隙間を介してデフレクタ24の外周面と放水口22の内周面間の隙間から放水させるように構成した放水ノズルが広く知られている。 Conventionally, as this type of fire-extinguishing nozzle, as shown in FIG. 7, a front end portion is formed in the water discharge port 22 on the front outer peripheral surface of the water discharge tube main body 20, and an annular valve is formed on the inner peripheral surface of the water discharge port 22. The operating cylinder 21 provided with the seat 23 is screwed so as to be able to advance and retreat in the front-rear direction, and the rear end is fixed in the center of the front end of the water discharge cylinder main body 20 at the center of the operating cylinder 21 The fixed shaft body 25, which is integrally mounted with the deflector 24 at the front end, is disposed, and the operation cylinder 21 is screwed so that the valve seat 23 is crimped to the rear surface of the deflector 24 to close the water discharge. In this state, the operation cylinder 21 is screwed back to separate the valve seat 23 rearward from the deflector 24, so that the pressure water from the water discharge cylinder main body 20 can be removed from the outer peripheral surface of the fixed shaft body 20 and the valve seat 23. The water is discharged from the gap between the outer peripheral surface of the deflector 24 and the inner peripheral surface of the water outlet 22 through the gap between the The resulting water discharge nozzle is widely known.

しかしながら、このような消火用ノズルによれば、デフレクタ24の外周面と操作筒体21の開口端内周面との間の環状の放水口22を通じてのみ、前方に向かって噴射されるだけであるから、デフレクタの前方側には噴射水が存在しない空間部が形成され、放水断面の噴流水密度が不均一となって消火状況に適応した有効な放水ができないといった問題点があった。 However, according to such a fire-extinguishing nozzle, it is only sprayed forward only through the annular water discharge port 22 between the outer peripheral surface of the deflector 24 and the inner peripheral surface of the opening end of the operation cylinder 21. Therefore, there is a problem that a space where no jet water is present is formed on the front side of the deflector, and the jet water density in the discharge section is not uniform, so that effective water discharge adapted to the fire extinguishing situation cannot be performed.

このため、上記のように構成している消火用ノズルにおいて、特許文献１に記載されているように、固定軸体内に前端がデフレクタの中心部から前方に向かって開口し且つ後端が操作筒体における弁座部から後方側の内周面と固定軸体との間の周側放水通路に開口している中央側放水通路を設けていると共に、操作筒体の内周面に連結片を介して固定軸体の前部外周面に摺動自在に外嵌したリング状弁体を一体に設けて操作筒体の弁座部をデフレクタの後面に密接させて前端放水口を閉止している状態においては、上記中央側放水通路の後端流入口を周側放水通路に全面的に連通させ、この状態から操作筒体を後退させることによって、中央側放水通路と周側放水通路との両通路を通じてデフレクタの中心部とデフレクタの外周側の前端放水口とから放水を行うように構成した消火用ノズルが開発されている。
登録実用新案第２５２３７７８号公報 For this reason, in the fire-extinguishing nozzle configured as described above, as described in Patent Document 1, the front end of the fixed shaft body opens forward from the center of the deflector, and the rear end is the operation cylinder. A central side water discharge passage that opens to a peripheral water discharge passage between the inner peripheral surface on the rear side from the valve seat portion in the body and the fixed shaft body, and a connecting piece on the inner peripheral surface of the operation cylinder A ring-shaped valve body slidably fitted on the outer peripheral surface of the front portion of the fixed shaft body is integrally provided, and the valve seat portion of the operation cylinder is brought into close contact with the rear surface of the deflector to close the front end water discharge port. In the state, the rear end inlet of the central side water discharge passage is fully communicated with the peripheral water discharge passage, and the operation cylinder is moved backward from this state to thereby provide both the central side water discharge passage and the peripheral water discharge passage. Front end water discharge at the center of the deflector and the outer periphery of the deflector through the passage Extinguishing nozzle which is configured to perform water discharge have been developed and a.
Registered Utility Model No. 2523778

上記消火用ノズルによれば、周側放水通路と連通した前端放水口からコーン状に噴射させながら、この噴射水の内部の空間にデフレクタの中心開口部から放水を行って放水断面の噴流水密度を略均等にすることができるが、放水開始時においては、操作筒体の弁座部をデフレクタの後面に密着させて放水口を閉止しているもかかわらず、リング状弁体が固定軸体の中央側放水通路の後端流入口を全面的に開放した位置に設けられているために、消火開始時には該中央側放水通路を通じてデフレクタの中心開口部から消火に必要な水量の噴射が瞬時に行われて大きな反動力が発生し、ノズルを操作する作業員の手元が狂うばかりでなく消火用ノズルを手放してしまう虞れがあった。 According to the above-mentioned fire-extinguishing nozzle, water is discharged from the central opening of the deflector into the space inside the jet water while jetting in a cone shape from the front-end water discharge port communicating with the peripheral water discharge passage, and the jet water density in the discharge cross section However, at the start of water discharge, the ring-shaped valve body is fixed to the fixed shaft body even though the valve seat portion of the operation cylinder is in close contact with the rear surface of the deflector and the water discharge port is closed. Since the rear end inlet of the central side water discharge passage is fully open, at the start of fire extinguishing, water injection necessary for fire extinguishing is instantaneously made from the central opening of the deflector through the central water discharge passage. As a result, a large reaction force was generated, and not only the operator operating the nozzle was out of order but also the fire-extinguishing nozzle could be released.

その上、この消火用ノズルは操作筒体内の周側放水通路に連通した上記前端放水口と固定軸体内の中央側放水通路に連通した上記中心開口部との少なくともいずれか一方を、常に開放した状態となるように構成されているから、消火活動中においては、この消火用ノズルからの放水を手元操作によって停止させることができず、別な作業員がホースの後端側に設けている開閉弁を閉じる操作を行わなければならないといった問題点があった。 In addition, the fire-extinguishing nozzle always opens at least one of the front end water discharge port communicating with the peripheral water discharge passage in the operation cylinder and the center opening communicating with the central water discharge passage in the fixed shaft. Since it is configured so that the water discharge from the fire-extinguishing nozzle cannot be stopped by hand operation during fire-fighting activities, another worker is provided on the rear end side of the hose. There was a problem that an operation to close the valve had to be performed.

さらに、放水開始時には上述したように、全面的に開放している中央側放水通路を通じて中心開口部から直状に放水し、この状態から操作筒体を後退させてその弁座部をデフレクタの後面から離間させることにより、放水口から上記直状噴射水を囲むようにコーン状の拡散放水を行うと共に、さらに、操作筒体の後退によってリング状弁体により中央側放水通路の上記流入口を徐々に閉止して直状の放水を停止し、コーン状の拡散放水のみを行うように構成しているので、このコーン状拡散放水内で直状放水が行われているのかどうかを手元操作では判断することが困難となり、放水断面において均一な噴流水密度でもって有効な放水が行えなくなる事態が発生するといった問題点があった。 Further, as described above, at the start of water discharge, water is discharged straight from the central opening through the central water discharge passage that is fully open, and from this state, the operating cylinder is retracted so that the valve seat is moved to the rear surface of the deflector. The cone-shaped diffusion water discharge is performed so as to surround the straight jet water from the water discharge port, and the inlet port of the central water discharge passage is gradually moved by the ring-shaped valve body by the retraction of the operation cylinder. It is configured to stop the straight water discharge and perform only the cone-shaped diffusion water discharge, so it is judged by hand operation whether the straight water discharge is performed in this cone-shaped diffusion water discharge. This makes it difficult to perform effective water discharge with a uniform jet water density in the water discharge section.

本発明は上記のような問題点に鑑みてなされたもので、その目的とするところは、放水開始時においては大きな反動力を生じさせることなく円滑な放水操作を可能にすると共に全面的に均一な噴流水密度でもって放水を行うことができ、その上、手元操作によって消火作業中に一旦放水を停止して次の火災場所にノズルを向けたのち、再び、正確な放水を行えるようにし、且つ、消火作業後には直ちに放水を停止させることができる消火用ノズルを提供するにある。 The present invention has been made in view of the above-described problems, and the object of the present invention is to enable a smooth water discharge operation without causing a large reaction force at the start of water discharge and to be uniform over the entire surface. In addition, the water can be discharged with a high jet water density, and after stopping the water discharge during the fire extinguishing operation by hand operation and directing the nozzle to the next fire place, the water can be discharged accurately again. And it is providing the fire extinguishing nozzle which can stop water discharge immediately after fire extinguishing work.

上記目的を達成するために本発明の消火用ノズルは、請求項１に記載したように、放水筒本体の前部外周面に前端部を放水口に形成し且つ該放水口の内周面に環状の弁座部を設けてなる操作筒体を前後方向に進退自在に螺合させていると共に、この操作筒体内の中心部に後端部が上記放水筒本体の前端中心部内に固定され且つ前端にデフレクタを一体に設けてなる固定軸体を配設し、さらに、放水筒本体内の圧力水通路を操作筒体の上記弁座部から後方の内周面と固定軸体の外周面間によって形成された周側放水通路を通じて上記弁座部と固定軸体間の隙間に連通させてあり、上記操作筒体を螺進させて上記弁座部を上記デフレクタの後面に圧着させることにより放水を閉止状態にし、操作筒体を螺退させて上記弁座部を上記デフレクタから後方に離間させることによって放水筒本体内からの圧力水を上記周側放水通路から上記隙間を通じてデフレクタの外周面と放水口の内周面間の外側噴射口から放水させるように構成した消火用放水ノズルにおいて、上記固定軸体内に、前端にデフレクタの中心部から前方に向かって開口した中央噴射口を有し且つ後端に上記周側放水通路に開口している流入口を有する中央側放水通路を設けていると共にこの中央側放水通路内に前後方向に貫通した螺旋状の放水路を設けてあり、さらに、上記操作筒体の内周面に上記固定軸体の後部外周面に摺動自在に外嵌して上記流入口を開閉する筒状弁体を連結片を介して一体に設け、上記外側噴射口からの放水開始後における操作筒体のさらなる螺退によって操作筒体と一体に後退する上記筒状弁体により上記中央側放水通路の流入口を開放させて上記外側噴射口からの放水とともに中央噴射口からの放水を行うように構成している。 In order to achieve the above object, a fire-extinguishing nozzle according to the present invention has a front end portion formed in a water discharge port on a front outer peripheral surface of a water discharge tube main body and an inner peripheral surface of the water discharge port. An operation cylinder having an annular valve seat is screwed in such a manner as to be able to advance and retreat in the front-rear direction, and a rear end is fixed to a center of the operation cylinder within the front end of the water discharge cylinder main body. A fixed shaft body integrally formed with a deflector is disposed at the front end, and further, a pressure water passage in the water discharge cylinder body is provided between the inner peripheral surface behind the valve seat portion of the operation cylinder body and the outer peripheral surface of the fixed shaft body. Is connected to the gap between the valve seat portion and the fixed shaft body through a circumferential water discharge passage formed by the above-mentioned structure, and the operation cylinder is screwed to press the valve seat portion against the rear surface of the deflector to discharge water. Is closed, the operating cylinder is screwed out, and the valve seat is removed from the deflector. Pressure water drainage extinguishing configured so as to discharge water from the outer injection port between the inner peripheral surface of the outer peripheral surface and the water discharge port of the deflector through the gap from the peripheral side water discharge passage from the water discharge cylinder body by spaced towards In the nozzle, in the fixed shaft body, a central side water discharge passage having a central injection port opened forward from the central portion of the deflector at the front end and an inflow opening opened in the circumferential water discharge passage at the rear end. the is provided with a helical tailrace penetrating in the longitudinal direction on the center side water discharge passage with are provided, further, slidably in the rear outer circumferential surface of the fixed shaft body to the inner peripheral surface of the operating cylinder A cylindrical valve body that is externally fitted to open and close the inlet is integrally provided via a connecting piece, and the operating cylinder is retracted integrally by further retraction of the operating cylinder after the start of water discharge from the outer injection port. in the cylindrical valve body Ri and thereby opens the inlet of the central-side water discharge passage configured to perform water discharge from a central injection opening with water discharge from the outer injection port.

このように構成した消火用ノズルにおいて、請求項２に係る発明は、上記外側噴射口を形成しているデフレクタの外周面と操作筒体の放水口との対向周面を全長に亘って互いに軸心方向に平行な周面に形成していると共に、操作筒体の弁座部がデフレクタの後端面に密接して放水口を閉止している状態においては、筒状弁体の前端部が中央側放水通路の流入口の前端から一定長さだけ前方部に位置しており、操作筒体が停止位置まで後退した状態においては筒状弁体が上記流入口を開放状態に保持した位置に達するように構成している。 In the fire-extinguishing nozzle configured as described above, the invention according to claim 2 is characterized in that the opposing peripheral surfaces of the outer peripheral surface of the deflector forming the outer injection port and the water discharge port of the operation cylinder are axially connected to each other over the entire length. In the state where the valve seat part of the operating cylinder is in close contact with the rear end face of the deflector and closes the water outlet, the front end part of the cylindrical valve body is in the center. It is located in the front part by a certain length from the front end of the inlet of the side water discharge passage, and when the operation cylinder is retracted to the stop position, the cylindrical valve body reaches the position where the inlet is held open. It is configured as follows.

請求項１に係る発明によれば、消火作業を行う際に、放水筒本体に進退自在に螺合している操作筒体の内周面に設けている弁座部をデフレクタの後面に圧着させて外側噴射口を閉止していると共に、前端に上記デフレクタを一体に設けている固定軸体内の放水通路の後端流入口を上記操作筒体の内周面に連結片を介して一体に設けている筒状弁体によって閉止しているので、放水口が全面的に閉止された状態となっているから、消火作業の準備が迅速に行えるのは勿論、放水筒本体を把持した状態で操作筒体を手元で正確に操作することができる。この状態から、まず、操作筒体を螺退させることにより該操作筒体の弁座部をデフレクタの後端から離間させて外側噴射口を開放させるように構成しているので、放水開始時の反動力が小さくて手元操作を狂わしたり、ノズルを手放すこともなく火災場所に正確に向けた状態で消火作業を行うことができる。 According to the first aspect of the present invention, when performing a fire extinguishing operation, the valve seat portion provided on the inner peripheral surface of the operation cylinder that is threadably engaged with the water discharge cylinder main body is pressed against the rear surface of the deflector. The rear injection port of the water discharge passage in the fixed shaft body which is integrally provided with the deflector at the front end is integrally provided on the inner peripheral surface of the operation cylinder via a connecting piece. Since the water outlet is completely closed because it is closed by the cylindrical valve body that is closed, it is possible to quickly prepare for the fire extinguishing work, as well as to operate while holding the water discharge cylinder body The cylinder can be accurately operated at hand. From this state, first, the operation cylinder is screwed back so that the valve seat portion of the operation cylinder is separated from the rear end of the deflector and the outer injection port is opened. The reaction force is so small that it is possible to carry out the fire extinguishing operation in a state where it is accurately directed to the fire place without going out of hand and without letting go of the nozzle.

さらに、放水筒本体に対して操作筒体を螺退させれば、操作筒体の開口端がデフレクタの後端側まで後退して外側噴射口から圧力水をコーン状に拡散噴射させることができると共に操作筒体と一体に移動する筒状弁体が固定軸体内の放水通路の流入口を徐々に開放して放水筒本体内を通じて圧送されてくる圧力水をこの流入口に分流させてデフレクタの前端中央部に開口している中央噴射口から上記コーン状噴射放水内に噴出させることができ、これらの放水によって消火に必要な所定量の放水が可能になると共に空洞部が生じることなく全面的に均一な噴流水密度でもって放水することができて効率よく消火作業を行うことができる。 Furthermore, if the operation cylinder is screwed out with respect to the water discharge cylinder main body, the opening end of the operation cylinder is retracted to the rear end side of the deflector, and the pressure water can be diffused and injected from the outer injection port in a cone shape. At the same time, a cylindrical valve body that moves integrally with the operation cylinder gradually opens the inlet of the water discharge passage in the fixed shaft body and diverts the pressure water pumped through the main body of the water discharge cylinder to the inlet of the deflector. It can be sprayed into the cone-shaped spray water discharge from the central injection port that is open at the center of the front end. These water discharges enable a predetermined amount of water discharge necessary for fire extinguishing and the entire surface without generating a cavity. The water can be discharged with a uniform jet water density and fire extinguishing can be performed efficiently.

その上、この放水状態から操作筒体をさらに螺退させたとしても、筒状弁体が流入口から後方に移動するだけで流入口を開口させた状態を保持することができるから、消火作業時には、デフレクタの中央部に開口している噴射口から圧力水が噴射しているかどうかを確認する必要もなく、圧力水をデフレクタの外周面側の外側噴射口と中央部に開口している中央噴射口とに分流させてこれらの両噴射口からフルコーン状態に噴射させながら消火作業を行うことができる。また、消火作業中に火災場所を移動する際には、操作筒体を螺進させることによって簡単且つ素早く放水を停止させることができ、次の消火作業が円滑に行うことができると共に消火作業後にも直ちに放水を停止させてこのノズルを装着している消火ホースの収納作業等が容易に行うことができる。 In addition, even if the operating cylinder is further screwed out from this water discharge state, the cylindrical valve body can be kept in the open state only by moving backward from the inflow port. Sometimes, it is not necessary to check whether pressure water is being injected from the injection port that is open to the center of the deflector, and the pressure water is opened to the outer injection port on the outer peripheral surface side of the deflector and the center that is open to the center. The fire can be extinguished while being diverted to the injection ports and being injected into the full cone state from both of these injection ports. In addition, when moving the fire place during fire extinguishing work, it is possible to stop water discharge easily and quickly by screwing the operating cylinder, and the next fire extinguishing work can be performed smoothly and after the fire extinguishing work. In addition, the water discharge is immediately stopped, and a fire hose equipped with this nozzle can be easily stored.

また、前端に上記デフレクタを設け、後端に上記流入口を設けている上記固定軸体内の放水通路内に、前後方向に貫通した螺旋状の放水路を設けているので、圧力水がこの螺旋状放水路を通過中に、噴射速度を増大させ且つ乱流を生じさせてデフレクタの中央部に設けている上記噴射口から勢いよく且つ遠くにまで噴射させることができ、放水効果を充分に発揮させることができる。 Furthermore, the deflector is provided at the front end, in the water discharge passage of the fixed shaft body is provided with the above-mentioned inlet to the rear end, since there is provided a spiral spillways penetrating in the front-pressure water this helix During passage through the water discharge channel, the injection speed can be increased and turbulent flow can be generated to inject vigorously and far away from the injection port provided in the central part of the deflector. Can be made.

請求項２に係る発明によれば、外側噴射口を形成している上記デフレクタの外周面と操作筒体の放水口との対向周面を全長に亘って互いに軸心方向に平行な周面に形成しているので、放水開始時には手元操作によって操作筒体を後退させることによって放水口から真っ直ぐな円筒形状ないしは棒状の放水形態でもって噴射させることができ、そのため、ノズルからの放水を消火すべき火災場所に向かって正確に行うことができるものであり、この状態を保持しながら操作筒体をさらに後退させることによって上述したように放水筒本体内から供給される圧力水を外側噴射口側と中央噴射口側とに分流させてフルコーン状態で所定の水量の放水を行うことができる。 According to the invention which concerns on Claim 2, the opposing peripheral surface of the outer peripheral surface of the said deflector which forms the outer side injection port, and the water discharge port of an operation cylinder body is a peripheral surface parallel to an axial direction mutually over a full length. Since it is formed, it can be sprayed in a straight cylindrical shape or rod-like water discharge form from the water discharge port by retreating the operation cylinder by hand operation at the start of water discharge, so the water discharge from the nozzle should be extinguished The pressure water supplied from the inside of the water discharge cylinder main body as described above can be supplied to the outer injection port side by further retracting the operation cylinder while maintaining this state. A predetermined amount of water can be discharged in a full cone state by diverting to the central injection port side.

次に、本発明の具体的な実施の形態を図面について説明すると、図１において、一定長さを有する円筒形状の放水筒本体１の前部外周面に形成した雄螺子部1aに、同じく円筒形状の操作筒体２の後部内周面に形成した雌螺子部2aを進退自在に螺合させていると共に、この放水筒本体１の後部内周面には消防ホースＨの前端部を連結させるための雌螺子部1bを形成している。さらに、放水筒本体１の後端から雄螺子部1aに至るまでの外周面を消火作業を行う作業員の握り面1cに形成していると共にこの握り面1cの前端部を雄螺子部1aよりも大径に形成してその大径部の前端面から後方に向かって操作筒体２の後端部を挿入させた一定深さの円環状溝３を形成してあり、この円環状溝３の溝底面に操作筒体２の後端面を当接させて該操作筒体２が所定の後退位置で停止させるように構成している。なお、操作筒体２の後端面が円環状溝３に達する前に放水筒本体１に対する操作筒体２の螺退を不能にしてその状態で停止させるように構成しておいてもよい。 Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a male screw portion 1a formed on the outer peripheral surface of the front portion of a cylindrical water discharge cylinder body 1 having a certain length is similarly cylindrical. A female screw portion 2a formed on the inner peripheral surface of the rear portion of the shaped operation cylinder 2 is screwed so as to be able to advance and retreat, and the front end portion of the fire hose H is connected to the inner peripheral surface of the rear portion of the water discharge cylinder main body 1. A female screw portion 1b is formed. Further, the outer peripheral surface from the rear end of the water discharge tube body 1 to the male screw portion 1a is formed on the grip surface 1c of the worker performing fire extinguishing work, and the front end portion of the grip surface 1c is formed from the male screw portion 1a. Is formed in a large diameter, and an annular groove 3 having a constant depth is formed by inserting the rear end portion of the operation cylinder 2 from the front end surface of the large diameter portion toward the rear. The rear end surface of the operation cylinder 2 is brought into contact with the bottom surface of the groove so that the operation cylinder 2 is stopped at a predetermined retracted position. In addition, before the rear end surface of the operation cylinder 2 reaches the annular groove 3, the operation cylinder 2 with respect to the water discharge cylinder main body 1 may be made unscrewable and stopped in that state.

この操作筒体２の前半部は放水筒本体１の雄螺子部1aの前端から前方に突出していると共にその前端部に正面円形状の放水口４を形成している。この放水口４は、操作筒体２の前端面中央部に前方に向かって開口していると共にその内周面4aは操作筒体２の軸心に平行な一定長さを有する周面に形成されてあり、さらに、この放水口４の後端における操作筒体２の内周面に該操作筒体２の中心に向かって一定の突出高さを有する環状の弁座部５を突設している。 The front half of the operation cylinder 2 protrudes forward from the front end of the male screw part 1a of the water discharge cylinder body 1 and a front circular water discharge port 4 is formed at the front end. The water discharge port 4 opens forward in the center of the front end surface of the operation cylinder 2 and has an inner peripheral surface 4 a formed on a peripheral surface having a certain length parallel to the axis of the operation cylinder 2. Furthermore, an annular valve seat portion 5 having a constant protruding height toward the center of the operation cylinder 2 is provided on the inner peripheral surface of the operation cylinder 2 at the rear end of the water discharge port 4. ing.

このように形成している操作筒体２内の中心部には、前端にデフレクタ７を一体に設けてなる固定軸体６を配設してこの固定軸体６の後端部を上記放水筒本体１の前端中心部内に固定している。この固定手段としては、固定軸体６の後端部を螺合させている支持筒８の外周面から数片の連結リブ8a、8a、8aを放射状に突設し、これらの連結リブ8aの外端を放水筒本体１の前端部内周面に固着、支持させてなるもので、上記デフレクタ７は固定軸体６の軸部前端から放水口４の内周面4aに向かって突設した円板形状に形成されていると共にその外径を放水口４よりも小径で弁座部５の内径よりも大径に形成してあり、弁座部５から前方における放水口４内に配設されている。 A fixed shaft body 6 having a deflector 7 integrally provided at the front end is disposed at the center of the operation tube body 2 formed in this way, and the rear end portion of the fixed shaft body 6 is connected to the water discharge tube. It is fixed in the center of the front end of the main body 1. As this fixing means, several pieces of connecting ribs 8a, 8a, 8a are projected radially from the outer peripheral surface of the support tube 8 to which the rear end portion of the fixed shaft body 6 is screwed. The outer end is fixed to and supported by the inner peripheral surface of the front end portion of the water discharge cylinder body 1, and the deflector 7 is a circle protruding from the front end of the shaft portion of the fixed shaft body 6 toward the inner peripheral surface 4 a of the water discharge port 4. It is formed in a plate shape and its outer diameter is smaller than the water outlet 4 and larger than the inner diameter of the valve seat portion 5, and is disposed in the water outlet 4 in front of the valve seat portion 5. ing.

さらに、このデフレクタ７の外周面は上記放水口４の内周面4aに平行で且つその長さは放水口４の内周面4aよりも短く形成されていて、この外周面と放水口４の内周面4a間で円環形状の外側噴射口９を形成していると共に固定軸体６のデフレクタ７よりも小径の軸体部の外径を上記弁座部５の内径よりも小径に形成してこの軸体部の前端部外周面と弁座部５の内周面との間に外側噴射口９に連通する隙間10を設けてあり、上記放水筒本体１に対して操作筒体２を螺進、即ち、回動操作して前進させることにより、弁座部５の前端面をデフレクタ７の後端面に圧着させて隙間10と外側噴射口９間の連通を遮断して放水口４を閉止状態にする一方、操作筒体２を螺退、即ち、上記と反対方向に回動操作して後退させることにより、弁座部５の前端面をデフレクタ７の後端面から後方に離間させて上記隙間10を外側噴射口９に連通させるように構成している。 Further, the outer peripheral surface of the deflector 7 is parallel to the inner peripheral surface 4 a of the water outlet 4 and the length thereof is shorter than the inner peripheral surface 4 a of the water outlet 4. An annular outer injection port 9 is formed between the inner peripheral surfaces 4a, and the outer diameter of the shaft body portion smaller in diameter than the deflector 7 of the fixed shaft body 6 is made smaller than the inner diameter of the valve seat portion 5. A gap 10 communicating with the outer injection port 9 is provided between the outer peripheral surface of the front end portion of the shaft body portion and the inner peripheral surface of the valve seat portion 5, and the operation cylinder body 2 with respect to the water discharge cylinder main body 1. The front end surface of the valve seat portion 5 is pressed against the rear end surface of the deflector 7 by screwing, i.e., rotating, so that the communication between the gap 10 and the outer injection port 9 is blocked. Is closed, while the operating cylinder 2 is retracted, that is, rotated in the direction opposite to the above to retract, the front end surface of the valve seat portion 5 is moved. The gap 10 is configured to communicate with the outer injection port 9 while being spaced rearward from the rear end surface of the deflector 7.

放水筒本体１内の空間部は消防ホースＨと連通した圧力水通路11に形成されていると共にこの通路11は操作筒体２の弁座部５から後方の内周面と固定軸体６の外周面間によって形成された周側放水通路12を通じて上記弁座部５と固定軸体６間の上記隙間10に連通させている。 A space in the water discharge tube main body 1 is formed in a pressure water passage 11 communicating with the fire hose H, and this passage 11 is formed from the valve seat portion 5 of the operation tube body 2 to the rear inner peripheral surface and the fixed shaft body 6. The valve 10 is communicated with the gap 10 between the valve seat portion 5 and the fixed shaft body 6 through a peripheral water discharge passage 12 formed between the outer peripheral surfaces.

また、固定軸体６の前部内には中央側放水通路13が設けられてあり、この中央側放水通路13の前端をデフレクタ７の中心部から前方に向かって開口した中央噴射口14に形成していると共に該中央側放水通路13の後端から固定軸体６の周壁数箇所を軸心に対して直角に貫通して上記周側放水通路12に連通した流入口15を形成し、この流入口15の開口端を固定軸体６の後部外周面に摺動自在に外嵌した筒状弁体16によって開閉するように構成している。 Further, a central side water discharge passage 13 is provided in the front portion of the fixed shaft body 6, and the front end of the center side water discharge passage 13 is formed in a central injection port 14 that opens forward from the center portion of the deflector 7. In addition, an inlet 15 is formed from the rear end of the central side water discharge passage 13 through several peripheral walls of the fixed shaft body 6 at right angles to the shaft center and communicating with the peripheral water discharge passage 12. The opening end of the inlet 15 is configured to be opened and closed by a cylindrical valve body 16 slidably fitted on the outer peripheral surface of the rear portion of the fixed shaft body 6.

上記筒状弁体16はその外周面から数片の連結片17、17、17を放射状に突設してこれらの連結片17の外端を操作筒体２の内周面に固着することによって操作筒体２に一体に設けられてあり、さらに、操作筒体２の上記弁座部５がデフレクタ７の後端面に密接して外側噴射口９を閉止している状態においては、この筒状弁体16の前部によって上記流入口15が全面的に閉止されていると共に筒状弁体16の前端部が流入口15の前端から上記放水口４の内周面4aの長さよりも短い長さだけ前方に位置しており、操作筒体２が後退してその後端面が上記放水筒本体１に形成している円環状溝３の溝底面に当接する間に、筒状弁体16の前部が流入口15から全面的に後退して流入口15を開放させるように構成している。
The cylindrical valve body 16 has a plurality of connecting pieces 17, 17, 17 projecting radially from the outer peripheral surface thereof, and the outer ends of these connecting pieces 17 are fixed to the inner peripheral surface of the operating cylinder body 2. When the valve seat portion 5 of the operation cylinder 2 is in close contact with the rear end surface of the deflector 7 and closes the outer injection port 9, the cylindrical shape is provided. The inlet 15 is entirely closed by the front part of the valve body 16 and the front end of the tubular valve body 16 is shorter than the length of the inner peripheral surface 4a of the water outlet 4 from the front end of the inlet 15. The front end of the tubular valve body 16 is positioned in front of the tubular valve body 16 while the operation cylinder 2 is retracted and the rear end surface thereof is in contact with the groove bottom surface of the annular groove 3 formed in the water discharge cylinder body 1. The part is configured to retreat completely from the inlet 15 to open the inlet 15.

さらに、上記中央側放水通路13の後部内には前後方向に貫通した螺旋状の放水路18を設けている。この放水路18は図１、図２に示すように、中心の小径短軸18a の外周面に一巻き状の螺旋羽根18b を一体に設けてなり、この螺旋羽根18b の外周端を中央側放水通路13の後部内周面に固着することによって形成されている。 Further, a spiral water discharge passage 18 penetrating in the front-rear direction is provided in the rear portion of the center side water discharge passage 13. As shown in FIGS. 1 and 2, the water discharge channel 18 is formed by integrally forming a spiral spiral blade 18b on the outer peripheral surface of the central small-diameter short shaft 18a. It is formed by adhering to the rear inner peripheral surface of the passage 13.

また、放水筒本体１の上記握り面1cの前端部外周面の所定箇所には図４、図６に示すように、指示点19が設けられている一方、操作筒体２の後端部外周面において、該操作筒体２の弁座部５がデフレクタ７の後端面に密接して放水口４を全面的に閉止している状態においては、指示点19と対向する部分に「閉止」の文字を記載してあり、操作筒体２を螺退させて上記放水口４を開口させたのち操作筒体２と一体に後退する筒状弁体16が中央側放水通路13の流入口15を開放する直前に達した状態においては、指示点19と対向する部分に「円筒状」若しくは「棒状」の文字を記載してあり、操作筒体２がその後端面を放水筒本体１の前端部の円環状溝３の溝底に当接等してそれ以上後退しない位置に達した状態においては、指示点19と対向する部分に「噴霧」の文字を記載している。なお、放水筒本体１に対して操作筒体２が相対的に一回転する間に「閉止」から「噴霧」状態になるように構成している。 Further, as shown in FIGS. 4 and 6, an indication point 19 is provided at a predetermined position on the outer peripheral surface of the front end portion of the grip surface 1 c of the water discharge tube main body 1, while the outer periphery of the rear end portion of the operation tube body 2. In the state where the valve seat portion 5 of the operation cylinder 2 is in close contact with the rear end surface of the deflector 7 and the water outlet 4 is completely closed, the portion facing the indicating point 19 is “closed”. The cylindrical valve body 16 that is retracted integrally with the operation cylinder 2 after the operation cylinder 2 is screwed back to open the water discharge port 4 is connected to the inlet 15 of the central side water discharge passage 13. In the state reached just before opening, the characters “cylindrical” or “bar” are written on the part facing the indicating point 19, and the operation cylinder 2 has the rear end face of the front end of the water discharge cylinder main body 1. In a state in which the annular groove 3 is in contact with the groove bottom and reaches a position where it does not retreat further, a portion facing the indicating point 19 The characters “spray” are described. In addition, it is comprised so that it may be in a "spray" state from "closed" while the operation cylinder 2 makes one rotation relatively with respect to the water discharge cylinder main body 1. FIG.

このように構成した消火用放水ノズルは、消火作業時において、放水筒本体１に対して操作筒体２を相対的に螺退させると、弁座部５の前端面がデフレクタ７の後端面に密着している「閉止」状態から図３に示すように、弁座部５がデフレクタ７から後方に離間し、操作筒体２内の周側放水通路12がデフレクタ７と放水口４との対向周面間の外側噴射口９に連通して放水筒本体１内の圧力水が操作筒体２の周側放水通路12を通じて外側噴射口９から噴射する。この際、放水口４とデフレクタ７との対向周面、即ち、外側噴射口９の内外周面は軸心方向に互いに平行に形成されていて「噴霧」状態になるまでは内外方向で対向しているので、この外側噴射口９から噴射する圧力水が中空円筒形状となり、且つ、この状態では固定軸体６内の中央側放水通路13の流入口15は筒状弁体16によって閉止されているから放水口４は全開となっておらず、そのため、外側噴射口９からの圧力水の噴射反動力は小さくて消火用ノズルを火災場所に向かって確実に向けた状態で消火作業を開始することができる。 In the fire-extinguishing water discharge nozzle configured as described above, when the operation cylinder 2 is screwed relatively with respect to the water discharge cylinder main body 1 during the fire extinguishing operation, the front end surface of the valve seat portion 5 becomes the rear end surface of the deflector 7. As shown in FIG. 3, the valve seat portion 5 is separated rearward from the deflector 7 and the circumferential water discharge passage 12 in the operation cylinder 2 is opposed to the deflector 7 and the water discharge port 4 as shown in FIG. Pressure water in the water discharge cylinder body 1 communicates with the outer injection holes 9 between the peripheral surfaces and is injected from the outer injection holes 9 through the peripheral water discharge passage 12 of the operation cylinder 2. At this time, the opposed peripheral surfaces of the water discharge port 4 and the deflector 7, that is, the inner and outer peripheral surfaces of the outer injection port 9 are formed parallel to each other in the axial direction, and are opposed in the inner and outer directions until the “spray” state is reached. Therefore, the pressure water injected from the outer injection port 9 has a hollow cylindrical shape, and in this state, the inlet 15 of the central water discharge passage 13 in the fixed shaft body 6 is closed by the cylindrical valve body 16. Therefore, the water discharge port 4 is not fully opened, and therefore, the reaction reaction force of the pressure water from the outer injection port 9 is small, and the fire extinguishing operation is started with the fire-extinguishing nozzle directed to the fire place with certainty. be able to.

次いで、操作筒体２を放水筒本体１に対してさらに螺退させると、操作筒体２の内周面に連結片17を介して一体に設けている上記筒状弁体16が固定軸体６上を後方に摺動移行して図５に示すように、上記中央側放水通路13の流入口15を開口させ、放水筒本体１内の圧力水通路11から操作筒体２内の周側放水通路12を流通する圧力水が流入口15にも分流して固定軸体６内の中央側放水通路13に流入し、螺旋状の放水路18を旋回しながら通過して中央側放水通路13の前端の中央噴射口14から勢いよく噴霧状に噴射される一方、上記外側噴射口９においてはデフレクタ７が操作筒体２の放水口４の開口端から前方に徐々に突出して上記円筒形状の噴射状態から前方に向かって徐々に拡散噴霧角度を大きくしながらコーン状に噴射し、このコーン状の噴射水の内部に中央側放水通路13の上記前端噴射口14からの圧力水が噴射される。 Next, when the operation cylinder 2 is further screwed with respect to the water discharge cylinder main body 1, the cylindrical valve body 16 provided integrally with the inner peripheral surface of the operation cylinder 2 via the connecting piece 17 is fixed shaft body. As shown in FIG. 5, sliding on the rear side 6, the inlet 15 of the center side water discharge passage 13 is opened, and the pressure water passage 11 in the water discharge main body 1 is connected to the peripheral side in the operation tube 2. The pressure water flowing through the water discharge passage 12 is also diverted to the inflow port 15 and flows into the central water discharge passage 13 in the fixed shaft body 6, passing through the spiral water discharge passage 18 while turning, and the central side water discharge passage 13. In the outer jet port 9, the deflector 7 gradually protrudes forward from the opening end of the water outlet 4 of the operation cylinder 2 and has the cylindrical shape. The cone spray is gradually increased from the sprayed state toward the front while gradually increasing the diffusion spray angle. Pressure water from the front end injection port 14 of the central water discharge passage 13 is injected into the inside.

さらに、操作筒体２を、その後端面が放水筒本体１の前端部の円環状溝３の溝底に当接するまで後退させると、筒状弁体16の後退によって流入口15が全面的に開放されて放水口４が全開状態となり、外側噴射口９からコーン状に噴射する中空噴射水内に中央噴射口14からの噴射水が充満したフルコーン状態で放水され、効率よく消火作業が行えるものである。また、放水筒本体１に対して操作筒体２を上記回動方向とは逆方向、即ち、螺進する方向に回動操作すると、一回転以下の回動によってコーン状の噴射状態から円筒形状の噴射状態を経て放水を簡単に停止させることができる。 Further, when the operation cylinder 2 is retracted until its rear end surface comes into contact with the groove bottom of the annular groove 3 at the front end of the water discharge cylinder body 1, the inlet 15 is fully opened by the retraction of the tubular valve body 16. As a result, the water outlet 4 is fully opened, and the hollow jet water injected in a cone shape from the outer jet port 9 is discharged in a full cone state filled with the jet water from the central jet port 14 so that the fire extinguishing operation can be performed efficiently. is there. Further, when the operation tube body 2 is rotated with respect to the water discharge tube main body 1 in the direction opposite to the rotation direction, that is, the screwing direction, the cylinder shape is changed from the cone-shaped injection state by the rotation of one rotation or less. Water discharge can be easily stopped through the injection state.

なお、以上の実施の形態においては、固定軸体６内の中央側放水通路13に設けている螺旋状の放水路18として、中心の小径短軸18a の外周面に１巻き状の螺旋羽根18b を設けてなる構造としているが、前後面間に亘って螺旋状に貫通した数個の孔を有する短軸体を中央側放水通路13内に装着しておいてもよい。 In the above-described embodiment, the spiral water discharge passage 18 provided in the central side water discharge passage 13 in the fixed shaft body 6 has a single spiral blade 18b on the outer peripheral surface of the central small-diameter short shaft 18a. However, a short shaft body having several holes that spirally penetrate between the front and rear surfaces may be mounted in the central water discharge passage 13.

放水口を閉止している状態の縦断側面図。The vertical side view of the state which has closed the water outlet. そのＡ−Ａ線における縦断正面図。The longitudinal front view in the AA line. 外側噴射口から放水している状態の縦断側面図。The vertical side view of the state which is discharging water from an outer side injection port. その側面図。The side view. 全面開放状態の縦断側面図。The longitudinal side view of the whole surface open state. その斜視図。FIG. 従来例を示す一部縦断側面図。The partially vertical side view which shows a prior art example.

１放水筒本体
２操作筒体
４放水口
５弁座部
６固定軸体
７デフレクタ
９外側噴射口
12 周側放水通路
13 中央側放水通路
14 中央噴射口
15 流入口
16 筒状弁体 DESCRIPTION OF SYMBOLS 1 Water discharge cylinder main body 2 Operation cylinder 4 Water discharge opening 5 Valve seat part 6 Fixed shaft body 7 Deflector 9 Outer injection opening
12 Circumferential water discharge passage
13 Central water discharge passage
14 Central injection port
15 Inlet
16 Tubular disc

Claims

放水筒本体の前部外周面に前端部を放水口に形成し且つ該放水口の内周面に環状の弁座部を設けてなる操作筒体を前後方向に進退自在に螺合させていると共に、この操作筒体内の中心部に後端部が上記放水筒本体の前端中心部内に固定され且つ前端にデフレクタを一体に設けてなる固定軸体を配設し、さらに、放水筒本体内の圧力水通路を操作筒体の上記弁座部から後方の内周面と固定軸体の外周面間によって形成された周側放水通路を通じて上記弁座部と固定軸体間の隙間に連通させてあり、上記操作筒体を螺進させて上記弁座部を上記デフレクタの後面に圧着させることにより放水を閉止状態にし、操作筒体を螺退させて上記弁座部を上記デフレクタから後方に離間させることによって放水筒本体内からの圧力水を上記周側放水通路から上記隙間を通じてデフレクタの外周面と放水口の内周面間の外側噴射口から放水させるように構成した消火用放水ノズルにおいて、上記固定軸体内に、前端にデフレクタの中心部から前方に向かって開口した中央噴射口を有し且つ後端に上記周側放水通路に開口している流入口を有する中央側放水通路を設けていると共にこの中央側放水通路内に前後方向に貫通した螺旋状の放水路を設けてあり、さらに、上記操作筒体の内周面に上記固定軸体の後部外周面に摺動自在に外嵌して上記流入口を開閉する筒状弁体を連結片を介して一体に設け、上記外側噴射口からの放水開始後における操作筒体のさらなる螺退によって操作筒体と一体に後退する上記筒状弁体により上記中央側放水通路の流入口を開放させて上記外側噴射口からの放水とともに中央噴射口からの放水を行うように構成していることを特徴とする消火用放水ノズル。 An operation cylinder having a front end portion formed at the water discharge port on the front outer peripheral surface of the water discharge tube main body and an annular valve seat portion provided on the inner peripheral surface of the water discharge port is threadably engaged in the front-rear direction. In addition, a fixed shaft body in which the rear end portion is fixed in the front end center portion of the water discharge tube main body and the deflector is integrally provided at the front end is disposed in the center portion of the operation tube body . A pressure water passage is communicated with a gap between the valve seat portion and the fixed shaft body through a circumferential water discharge passage formed between an inner peripheral surface behind the valve seat portion of the operation cylinder and an outer peripheral surface of the fixed shaft body. Yes , the operation cylinder is screwed and the valve seat is pressed against the rear surface of the deflector to close the water discharge, and the operation cylinder is screwed back so that the valve seat is separated from the deflector backward. the pressurized water from the water discharge cylinder body from the peripheral side water discharge passage by In fire-extinguishing water discharge nozzles configured to discharge water serial peripheral surface of the deflector through the gap from the outer injection port between the inner peripheral surface of the outlets, the body said fixed shaft, from the center of the deflector to the front end toward the front opening A central water discharge passage having a central injection port and an inlet opening at the rear end of the peripheral water discharge passage and a spiral discharge extending in the front-rear direction in the central water discharge passage. is provided with a water channel, further through the connecting piece a tubular valve body and slidably fitted to the rear outer peripheral surface of the fixed shaft body to the inner peripheral surface of the operating cylinder for opening and closing said inlet provided integrally, the outside opens the inlet of the central-side water discharge passage by the cylindrical valve body retreats integrally with the operating tube body by a further screw retreat of the operating tube body after water discharge starting from the outer injection port Along with water discharge from the injection port Fire drainage nozzle, characterized in that it is configured to perform water discharge from central injection port.

外側噴射口を形成しているデフレクタの外周面と操作筒体の放水口との対向周面を全長に亘って互いに軸心方向に平行な周面に形成していると共に、操作筒体の弁座部がデフレクタの後端面に密接して放水口を閉止している状態においては、筒状弁体の前端部が中央側放水通路の流入口の前端から一定長さだけ前方部に位置しており、操作筒体が停止位置まで後退した状態においては筒状弁体が上記流入口を開放状態に保持した位置に達するように構成していることを特徴とする請求項１に記載の消火用放水ノズル。 The outer peripheral surface of the deflector forming the outer injection port and the outer peripheral surface of the operation cylinder body that are opposed to each other are formed on the peripheral surface parallel to the axial direction over the entire length, and the valve of the operation cylinder body In the state where the seat closes to the rear end face of the deflector and closes the water outlet, the front end of the tubular valve body is located at the front part by a certain length from the front end of the inlet of the central water discharge passage. The fire extinguishing unit according to claim 1, wherein the tubular valve body reaches a position where the inflow port is held open in a state where the operation cylinder is retracted to the stop position. Water discharge nozzle.