JPH0754153Y2

JPH0754153Y2 - Liquid supply and discharge device for tank truck

Info

Publication number: JPH0754153Y2
Application number: JP1992007769U
Authority: JP
Inventors: 昌弘池田
Original assignee: Tokyu Car Corp
Current assignee: Tokyu Car Corp
Priority date: 1992-01-27
Filing date: 1992-01-27
Publication date: 1995-12-13
Anticipated expiration: 2005-12-13
Also published as: JPH0610192U

Description

[Detailed description of the device]

【０００１】[0001]

【産業上の利用分野】本考案は、タンクローリ車のタン
ク本体に設けられ、タンク本体内に液体を給排するのに
好適に用いられるタンクローリ車用液体給排装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry liquid supply / drainage device which is provided in a tank body of a tank lorry vehicle and is preferably used for supplying / discharging liquid to / from the tank body.

【０００２】[0002]

【従来の技術】図７および図８に従来技術によるタンク
ローリ車用液体給排装置を示す。2. Description of the Related Art FIGS. 7 and 8 show a liquid supply / drainage device for a tank truck according to the prior art.

【０００３】図中、１はタンクローリ車に搭載されたタ
ンク本体を示し、該タンク本体１は、内部が隔壁２によ
って複数の油室３，３（２個のみ図示）に画成され、各
油室３には液体としてのガソリン等の油液が収容される
ようになっている。In the figure, reference numeral 1 denotes a tank main body mounted on a tank truck, and the inside of the tank main body 1 is defined by a partition wall 2 into a plurality of oil chambers 3 and 3 (only two of which are shown). The chamber 3 is adapted to accommodate an oil liquid such as gasoline as a liquid.

【０００４】そして、各油室３には、タンク本体１の下
部側となる底部１Ａにそれぞれ給排弁４，４が取付けら
れている。Further, in each oil chamber 3, supply / discharge valves 4 and 4 are attached to a bottom portion 1A on the lower side of the tank body 1.

【０００５】ここで、各給排弁４は、図７に示す如く、
給排ポ−ト５と、後述する弁体７、弁軸８等から構成さ
れている。Here, each supply / discharge valve 4 is, as shown in FIG.
It is composed of a supply / discharge port 5, a valve body 7 and a valve shaft 8 which will be described later.

【０００６】図中、５は略Ｌ字状の管体からなる給排ポ
ートを示し、該給排ポート５の一側外周には厚肉環状の
取付部５Ａが形成され、他側には該取付部５Ａから下向
きに伸び、ほぼ直角に屈曲した屈曲部５Ｂおよび該屈曲
部５Ｂから後方に伸びる接続部５Ｃが形成されている。
また、取付部５Ａの内周側には、給排ポート５上にカバ
ー６を固定するため、外周に雄ねじ部５Ｄが形成された
筒状突起５Ｅと、該筒状突起５Ｅの内周側に位置する環
状の弁座部５Ｆとが上向きに同軸状に突設されている。
そして、屈曲部５Ｂと接続部５Ｃとの間には、環状の他
の弁座部５Ｇが屈曲部５Ｂ側に向けて突設されている。In the figure, reference numeral 5 designates a supply / discharge port formed of a substantially L-shaped pipe body. A thick-walled annular mounting portion 5A is formed on the outer periphery of one side of the supply / discharge port 5, and the other side thereof is provided with the attachment part 5A. A bent portion 5B extending downward from the mounting portion 5A and bent substantially at a right angle and a connecting portion 5C extending rearward from the bent portion 5B are formed.
Further, on the inner peripheral side of the mounting portion 5A, in order to fix the cover 6 on the supply / discharge port 5, the cylindrical protrusion 5E having the male screw portion 5D formed on the outer periphery and the inner peripheral side of the cylindrical protrusion 5E are formed. The located annular valve seat portion 5F is provided so as to project upward and coaxially.
Another annular valve seat portion 5G is provided between the bent portion 5B and the connection portion 5C so as to protrude toward the bent portion 5B.

【０００７】６はカバーを示し、該カバー６は逆椀状に
形成され、該カバー６には内側と外側を連通する流通穴
６Ａ，６Ａ，…が複数個形成されている。また、該カバ
ー６の上側中央にはねじ穴６Ｂが形成され、下端側の開
口部６Ｃは前記給排ポート５の筒状突起５Ｅに雄ねじ部
５Ｄを介して螺着されている。Reference numeral 6 denotes a cover, which is formed in an inverted bowl shape, and the cover 6 is formed with a plurality of flow holes 6A, 6A, ... A screw hole 6B is formed in the center of the upper side of the cover 6, and an opening 6C on the lower end side is screwed to the cylindrical projection 5E of the supply / discharge port 5 via a male screw portion 5D.

【０００８】７は前記カバー６内に位置して給排ポート
５の弁座部５Ｆに離着座する円板状の弁体を示し、該弁
体７は上カバー６のねじ穴６Ｂ内に螺合して挿通される
弁軸８の先端にベアリング９を介して回転自在に支持さ
れている。ここで、弁軸８は中間部外周にねじ穴６Ｂに
螺合する雄ねじ部８Ａが形成され、該弁軸８は後述のハ
ンドル１３で回転されることにより、カバー６のねじ穴
６Ｂに対して上，下方向に移動し、弁体７を弁座部５Ｆ
に離着座させるようになっている。Reference numeral 7 denotes a disc-shaped valve body which is located inside the cover 6 and which is seated on the valve seat portion 5F of the supply / discharge port 5, and the valve body 7 is screwed into the screw hole 6B of the upper cover 6. It is rotatably supported via a bearing 9 at the tip of the valve shaft 8 inserted together. Here, the valve shaft 8 is formed with a male screw portion 8A that is screwed into the screw hole 6B on the outer periphery of the intermediate portion, and the valve shaft 8 is rotated by a handle 13 described later, so that the valve shaft 8 is screwed into the screw hole 6B of the cover 6. Moves up and down to move the valve body 7 to the valve seat portion 5F.
It is designed to be seated on and off.

【０００９】１０は給排ポ−ト５の弁座部５Ｇに離着座
する補助弁を示し、該補助弁１０はレバー１１を回動す
ることにより、弁軸１２を介して開，閉され、給排弁４
の開弁時に接続部５Ｃ側をタンク本体１内に対して開閉
する。そして、該補助弁１０は緊急時に地上からレバー
１１を操作することにより、油液の給排を中断させるよ
うになっている。Reference numeral 10 denotes an auxiliary valve which is seated on and off the valve seat portion 5G of the supply / discharge port 5, and the auxiliary valve 10 is opened and closed via a valve shaft 12 by rotating a lever 11. Supply / Discharge valve 4
When the valve is opened, the connecting portion 5C side is opened and closed with respect to the inside of the tank body 1. The auxiliary valve 10 interrupts the supply and discharge of the oil liquid by operating the lever 11 from the ground in an emergency.

【００１０】１３はタンク本体１の上部１Ｂに回動可能
に設けられたハンドルを示し、該ハンドル１３の下端側
は、自在継手１４を介して弁軸８に接続され、給排弁４
の弁体７を開，閉するようになっている。ここで、タン
ク本体１の上部１Ｂには各油室３毎に、各給排弁４の弁
体７と同時に開，閉弁する空気導入弁（図示せず）が設
けられ、各給排弁４が開いたときに空気導入弁が同時に
開弁して油室３内に空気の流入を許し、タンク本体１内
が負圧状態となるのを防止して各油室３内の油液をスム
ーズに排出できるようにしている。Reference numeral 13 denotes a handle rotatably provided on the upper portion 1B of the tank body 1. The lower end side of the handle 13 is connected to the valve shaft 8 via a universal joint 14, and the supply / discharge valve 4 is provided.
The valve body 7 is opened and closed. Here, an air introduction valve (not shown) that opens and closes simultaneously with the valve body 7 of each supply / discharge valve 4 is provided in the upper portion 1B of the tank body 1 for each oil chamber 3, and each supply / discharge valve is provided. When 4 is opened, the air introduction valve is simultaneously opened to allow the inflow of air into the oil chamber 3 and prevent the tank main body 1 from being in a negative pressure state, so that the oil liquid in each oil chamber 3 is prevented. It is designed so that it can be discharged smoothly.

【００１１】従来技術によるタンクローリ車用液体給排
装置は以上の如く構成され、タンク本体１内から油液を
排出して給油所の地下タンク１５内に供給するときに
は、給排出パイプ１６を給排ポ−ト５の接続部５Ｃに接
続し、作業者がタンク本体１の上部１Ｂ上に登り、ハン
ドル１３を回転操作することにより、自在継手１４を介
して給排弁４の弁軸８を回転させる。このとき、弁軸８
は雄ねじ部８Ａがカバー６のねじ穴６Ｂに螺合している
ので、カバー６に対して上向きに移動し、該弁軸８の移
動により弁体７を弁座部５Ｆから離座させる。そして、
給排ポ−ト５から下方に突出するレバー１１を回動操作
すれば、補助弁１０が弁座部５Ｇから離座するので、油
室３内は接続部５Ｃ、給排出パイプ１６等を介して地下
タンク１５内と連通するようになる。このとき、タンク
本体１の上部では、ハンドル１３によって空気導入弁も
開弁し、タンク本体１内の液面高さが変化してもタンク
本体１の内圧が変化することはなく、油室３内の油液は
地下タンク１５内に向けてスムーズに流入する。The liquid supply / drainage device for a tank truck according to the prior art is constructed as described above, and when the oil liquid is discharged from the tank body 1 and supplied to the underground tank 15 of the gas filling station, the supply / discharge pipe 16 is supplied / discharged. The valve shaft 8 of the supply / discharge valve 4 is rotated via the universal joint 14 by connecting to the connecting portion 5C of the port 5, the operator climbing on the upper portion 1B of the tank body 1 and rotating the handle 13. Let At this time, the valve shaft 8
Since the male screw portion 8A is screwed into the screw hole 6B of the cover 6, the male screw portion 8A moves upward with respect to the cover 6, and the valve body 7 is separated from the valve seat portion 5F by the movement of the valve shaft 8. And
When the lever 11 protruding downward from the supply / discharge port 5 is rotated, the auxiliary valve 10 is separated from the valve seat portion 5G, so that the inside of the oil chamber 3 is connected via the connection portion 5C, the supply / discharge pipe 16 and the like. Will communicate with the inside of the underground tank 15. At this time, in the upper part of the tank body 1, the air introduction valve is also opened by the handle 13, and even if the liquid level in the tank body 1 changes, the internal pressure of the tank body 1 does not change, and the oil chamber 3 The oil liquid inside smoothly flows into the underground tank 15.

【００１２】一方、タンク本体１内に油液を供給するに
は、給排ポート５の接続部５Ｃに供給パイプ（図示せ
ず）を接続し、排出時と同様にして給排弁４および空気
導入弁を開弁させ、接続部５Ｃ側から図示しないポンプ
等によりタンク本体１内に油液を圧送するようにして行
っている。On the other hand, in order to supply the oil liquid into the tank body 1, a supply pipe (not shown) is connected to the connecting portion 5C of the supply / discharge port 5, and the supply / discharge valve 4 and the air are supplied in the same manner as the discharge. The introduction valve is opened, and the oil liquid is pressure-fed from the connecting portion 5C side into the tank body 1 by a pump or the like (not shown).

【００１３】[0013]

【考案が解決しようとする課題】ところで、上述した従
来技術によるタンクローリ車用液体給排装置では、タン
ク本体１内に油液を給排する場合に、作業者がタンク本
体１の上部１Ｂ上に登り、ハンドル１３を回動操作して
給排弁４等を開弁させる必要があるため、油液の給排作
業が危険で煩雑となり、作業性が非常に悪いという問題
がある。In the liquid supply / drainage device for a tank truck according to the above-mentioned conventional technique, when the oil liquid is supplied / drained into / from the tank main body 1, the operator places it on the upper portion 1B of the tank main body 1. Since it is necessary to climb and rotate the handle 13 to open the supply / discharge valve 4 and the like, there is a problem that the oil supply / discharge work is dangerous and complicated, and the workability is very poor.

【００１４】そして、給排弁４は緊急時にタンク本体１
の下側から操作できないので、タンク本体１の下側に補
助弁１０を設ける必要があり、この補助弁１０によって
部品点数が増加し、製造時の作業性が悪いという問題が
ある。The supply / discharge valve 4 is used for the tank body 1 in an emergency.
Since it cannot be operated from the lower side, it is necessary to provide the auxiliary valve 10 on the lower side of the tank main body 1. This auxiliary valve 10 increases the number of parts, and there is a problem that workability during manufacturing is poor.

【００１５】また、タンク本体１には各油室３毎にタン
ク本体１の上部にハンドル１３を取付け、底部１Ａ側の
給排弁４と自在継手１４等を介して接続する作業が必要
となり、製造時の作業性も悪いという問題がある。Further, in the tank main body 1, it is necessary to attach a handle 13 to the upper part of the tank main body 1 for each oil chamber 3 and connect it to the supply / discharge valve 4 on the bottom 1A side through a universal joint 14 or the like. There is also a problem that workability during manufacturing is poor.

【００１６】本考案は上述した従来技術の問題に鑑みな
されたもので、本考案は、タンク本体に液体を給排する
ときに、給排弁の開弁操作をタンク本体の下側から簡単
かつ迅速に行うことができ、タンク本体に対する給排弁
等の組み付け作業を簡略化できるようにしたタンクロー
リ車用液体給排装置を提供することを目的としている。The present invention has been made in view of the above-mentioned problems of the prior art. The present invention makes it possible to easily open and close the supply / discharge valve from the lower side of the tank body when the liquid is supplied to or discharged from the tank body. An object of the present invention is to provide a liquid supply / drainage device for a tank truck, which can be quickly performed and can simplify the work of assembling the supply / drain valve and the like to the tank body.

【００１７】[0017]

【課題を解決するための手段】上述した課題を解決する
ために本考案は、タンクローリ車に設けられ、液体を収
容するタンク本体と、該タンク本体の下部側に設けら
れ、該タンク本体内の液体を給排すべく、給排ポートを
開，閉する給排弁とからなるタンクローリ車用液体給排
装置に適用される。そして、請求項１に記載の考案が採
用する構成の特徴は、前記給排弁を、基端側が前記給排
ポートから外部に突出し、先端側が前記タンク本体内に
向けて伸長した中空の弁軸と、内周側が該弁軸に摺動可
能に挿嵌され、外周側が前記給排ポートに設けた弁座に
離着座する弁体と、前記弁軸の先端側を覆うように有蓋
筒状に形成され、開口端側が該弁体に一体化されたシリ
ンダケースと、該シリンダケース内にエア室とばね室を
画成すべく、外周側が該シリンダケース内に摺動可能に
挿嵌され、内周側が前記弁軸の先端側に固定されたピス
トンと、該ピストンと弁体との間に配設され、該弁体を
常時閉弁方向に付勢すべく前記ばね室内に収容された弁
ばねとから構成し、前記シリンダケースの周囲には該シ
リンダケースを覆うように有蓋筒状に形成されたフィル
タを設け、かつ前記弁軸の基端側には、前記弁体をシリ
ンダケースと共に前記弁ばねに抗して開弁方向に駆動す
べく、前記給排ポートの外部から弁軸内を介して前記エ
ア室内にエアを供給するエア供給手段を接続する構成と
したことにある。また、請求項２に記載の考案のよう
に、前記タンク本体の上部側には、外部からエアを給排
することにより前記給排弁と共に開，閉弁し、前記タン
ク本体内を大気圧状態に保持する空気導入弁を設ける構
成とするのが好ましい。 This devise to solve the problems above mentioned SUMMARY OF THE INVENTION are provided in tank lorry vehicles, yield a liquid
The tank body that holds the
In order to supply and discharge the liquid in the tank body,
Liquid supply / drainage for tank trucks consisting of a supply / drain valve that opens and closes
Applies to equipment. Then, the configuration employing the devise of claim 1, wherein the said supply and discharge valves, base end protruding outward from the sheet discharge port, the tip end side of a hollow which extends toward the tank body A valve shaft, a valve body whose inner peripheral side is slidably inserted in the valve shaft, and whose outer peripheral side is seated on and away from a valve seat provided in the supply / discharge port, and a cylinder with a lid so as to cover the tip side of the valve shaft. A cylinder case formed in a circular shape and having an open end side integrated with the valve body, and an outer peripheral side slidably inserted into the cylinder case so as to define an air chamber and a spring chamber in the cylinder case, A piston whose inner peripheral side is fixed to the tip side of the valve shaft, and a valve which is disposed between the piston and the valve body and is housed in the spring chamber so as to always urge the valve body in the valve closing direction. It is composed of a spring and the cylinder case is surrounded by the seal.
A film-filled cylinder that covers the binder case
Provided data, and the base end of the valve shaft, Siri said valve body
Drives in the valve opening direction against the valve spring together with the rear case.
Order, lies in the <br/> configured to connect the air supply means that teapot subjecting air to said air chamber through the supply from outside the valve in the axis of the exhaust port. Also, as in the invention according to claim 2.
In addition, air is supplied to and discharged from the outside on the upper side of the tank body.
By opening and closing together with the supply / discharge valve,
A structure for installing an air introduction valve that keeps the inside of the main body at atmospheric pressure
Preferably.

【００１８】[0018]

【作用】上記構成により、請求項１に記載した考案によ
る給排弁は、エア供給手段を操作して弁軸の基端側から
シリンダケースのエア室内にエア圧を導入したときに、
該エア室内の圧力が上昇するから、このエア圧によりシ
リンダケースがピストンに対して相対移動するように押
圧され、シリンダケースはピストンの外周側に摺接しつ
つ、弁体を弁ばねに抗して開弁方向に駆動し弁座から離
座させる。一方、エア室内からエア圧を排出したときに
は、前記弁体がシリンダケースと共に弁ばねによって閉
弁方向に押動されるようになり、前記弁体が弁座に着座
することによって給排弁は閉弁状態となる。また、請求
項２に記載した考案のように、タンク本体の上部側に空
気導入弁を設けることにより、例えばタンク本体の下部
側で給排弁を開弁させ、タンク本体内の液体を外部に排
出するときに、前記空気導入弁を給排弁と共に開弁させ
ることができ、該空気導入弁を介してタンク本体内に空
気（外気）を導入することにより、該タンク本体内が負
圧状態となるのを確実に防止できる。そして、タンク本
体内を大気圧状態に保持することにより、前記給排弁を
介した液体の給排作業をスムーズに行うことができる。 With the above construction, the device according to claim 1
The supply / discharge valve that operates when air is introduced into the air chamber of the cylinder case from the base end side of the valve shaft by operating the air supply means ,
Press as from the pressure of the air chamber rises, more shea <br/> cylinder case d A pressure of this is relatively moved against the piston
When pressed, the cylinder case slides against the outer circumference of the piston.
One, against the valve body of the valve spring is unseated from the driven valve seat in the valve opening direction. On the other hand, when the out exhaust the air pressure from the air chamber
, Said valve body is in the closed I by the valve spring with the cylinder case
Being pushed in the valve direction, the valve element is seated on the valve seat.
Sheet discharge valve is ing a closed state by. Also bill
As in the invention described in Item 2, there is an empty space on the upper side of the tank body.
By providing an air introduction valve, for example, the bottom of the tank body
Side, open the supply / drain valve to drain the liquid in the tank body to the outside.
At the time of discharge, open the air introduction valve together with the supply / discharge valve.
Through the air inlet valve and empty in the tank body.
By introducing air (outside air), the inside of the tank main body becomes negative.
It is possible to reliably prevent a pressure state. And the tank book
By keeping the inside of the body at atmospheric pressure,
It is possible to smoothly perform the liquid supply / drainage work via the liquid.

【００１９】[0019]

【実施例】以下、本考案の実施例を図１ないし図６に基
づき詳述する。なお、実施例では前記従来技術と同一の
構成要素に同一符号を付し、その説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described in detail below with reference to FIGS. In the embodiments, the same components as those of the conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

【００２０】図１ないし図３は本考案の第１の実施例を
示している。1 to 3 show a first embodiment of the present invention.

【００２１】図中、２１は本実施例で用いる給排弁を示
し、該給排弁２１は後述の給排ポ−ト２２、弁軸２３、
弁体２４、シリンダケース２５等から大略構成されてい
る。In the figure, reference numeral 21 denotes a supply / discharge valve used in this embodiment, and the supply / discharge valve 21 includes a supply / discharge port 22, a valve shaft 23, which will be described later.
The valve body 24, the cylinder case 25, etc. are generally configured.

【００２２】２２はタンク本体１の油室３内に連通する
給排ポ−トを示し、該給排ポ−ト２２は略Ｌ字状の管体
からなり、該給排ポ−ト２２の一側には径方向外側に厚
肉環状のフランジ部２２Ａが形成され、該フランジ部２
２Ａはタンク本体１の底部１Ａにボルト等を介して固着
されている。そして、該フランジ部２２Ａの内周側には
筒状突起２２Ｂが、該筒状突起２２Ｂの内周側には弁座
となる環状の弁座部２２Ｃがそれぞれ上向きに一体形成
され、該弁座部２２Ｃの内径Ｄ1 は、後述するシリンダ
ケース２５の内径Ｄ2 よりも若干小さくなるように形成
されている。また、給排ポ−ト２２の中間部は、Ｌ字状
の屈曲部２２Ｄとなり、該屈曲部２２Ｄの後方には給排
ポ−ト２２の他側に位置して接続部２２Ｅが一体形成さ
れている。そして、給排ポ−ト２２には、屈曲部２２Ｄ
の下部側に位置して厚肉に形成されたボス部２２Ｆが設
けられ、該ボス部２２Ｆの中央には挿通穴２２Ｇが形成
されている。Reference numeral 22 denotes a supply / discharge port which communicates with the oil chamber 3 of the tank main body 1. The supply / discharge port 22 is composed of a substantially L-shaped pipe body. A thick-walled annular flange portion 22A is formed radially outward on one side.
2A is fixed to the bottom portion 1A of the tank body 1 via bolts or the like. A cylindrical protrusion 22B is integrally formed on the inner peripheral side of the flange portion 22A, and an annular valve seat portion 22C serving as a valve seat is integrally formed on the inner peripheral side of the cylindrical protrusion 22B in an upward direction. The inner diameter D1 of the portion 22C is formed to be slightly smaller than the inner diameter D2 of the cylinder case 25 described later. An intermediate portion of the supply / discharge port 22 is an L-shaped bent portion 22D, and a connection portion 22E is integrally formed behind the bent portion 22D and located on the other side of the supply / discharge port 22. ing. The supply / discharge port 22 has a bent portion 22D.
A thick boss portion 22F is provided on the lower side of the boss portion 22F, and an insertion hole 22G is formed at the center of the boss portion 22F.

【００２３】２３は中空パイプからなる弁軸２３を示
し、該弁軸２３には基端側外周と先端側外周にそれぞれ
雄ねじ部２３Ａ、２３Ｂが形成され、軸方向に軸穴２３
Ｃが穿設されている。そして、該弁軸２３は雄ねじ部２
３Ａ側が前記ボス部２２Ｆの挿通穴２２Ｇに挿通して給
排ポ−ト２２にナット等で固着され、弁軸２３の先端側
は弁座部２２Ｃの中心部を貫通してタンク本体１内を上
向きに伸長している。Reference numeral 23 denotes a valve shaft 23 made of a hollow pipe. Male screw portions 23A and 23B are formed on the outer circumference of the base end side and the outer circumference of the tip end side of the valve shaft 23, and the axial hole 23 is formed in the axial direction.
C is provided. The valve shaft 23 is attached to the male screw portion 2
The 3A side is inserted into the insertion hole 22G of the boss portion 22F and is fixed to the supply / discharge port 22 with a nut or the like, and the tip end side of the valve shaft 23 penetrates the center portion of the valve seat portion 22C and the inside of the tank body 1 It extends upward.

【００２４】２４は給排ポ−ト２２の弁座部２２Ｃに離
着座する弁体を示し、該弁体２４は略円皿状に形成さ
れ、中央部には挿通穴２４Ａを有するボス部２４Ｂが設
けられている。また、該ボス部２４Ｂの外周側には、弁
体２４の上下方向に穿設された貫通孔２４Ｃが形成され
ている。また、該弁体２４の外周側には上向きに突出
し、内周側に雌ねじ部２４Ｄが形成された筒状突起２４
Ｅが設けられている。そして、該弁体２４は挿通穴２４
Ａを前記弁軸２３に挿通することにより、給排ポ−ト２
２の弁座部２２Ｃより上側で弁軸２３に摺動可能に支持
される。Reference numeral 24 designates a valve body which is seated on and detached from a valve seat portion 22C of the supply / discharge port 22. The valve body 24 is formed in a substantially disc shape and has a boss portion 24B having an insertion hole 24A in its central portion. Is provided. Further, a through hole 24C formed in the valve body 24 in the vertical direction is formed on the outer peripheral side of the boss portion 24B. In addition, a cylindrical projection 24 that protrudes upward on the outer peripheral side of the valve body 24 and has a female screw portion 24D formed on the inner peripheral side thereof.
E is provided. The valve body 24 is inserted through the insertion hole 24.
By inserting A into the valve shaft 23, the supply / discharge port 2
The valve shaft 23 is slidably supported above the second valve seat portion 22C.

【００２５】２５は弁軸２３の先端側を上側から覆うシ
リンダケースを示し、該シリンダケース２５は有蓋筒状
に形成され、上端側が蓋部２５Ａで閉塞されている。ま
た、該シリンダケース２５の下端側は開口部２５Ｂとな
り、該開口部２５Ｂの上側には環状の鍔部２５Ｃが形成
されている。そして、該シリンダケース２５は開口部２
５Ｂ側が弁体２４の筒状突起２４Ｅに雌ねじ部２４Ｄを
介して螺着され、弁体２４と一体化されている。Reference numeral 25 denotes a cylinder case that covers the tip end side of the valve shaft 23 from the upper side. The cylinder case 25 is formed in a cylindrical shape with a lid, and the upper end side is closed by a lid portion 25A. Further, the lower end side of the cylinder case 25 becomes an opening 25B, and an annular flange 25C is formed above the opening 25B. The cylinder case 25 has the opening 2
The 5B side is screwed to the cylindrical protrusion 24E of the valve body 24 via the female screw portion 24D, and is integrated with the valve body 24.

【００２６】２６はシリンダケース２５内に摺動可能に
挿嵌されたピストンを示し、該ピストン２６は中央に挿
通穴２６Ａが形成されたボス部２６Ｂを有し、該ボス部
２６Ｂは挿通穴２６Ａを介して弁軸２３の雄ねじ部２３
Ｂ側にナット等で固着されている。また、該ピストン２
６はボス部２６Ｂの外周側が筒状の摺接部２６Ｃとなっ
ており、該摺接部２６Ｃの外周側に沿って前記シリンダ
ケース２５が上，下方向に摺動するようになっている。
そして、該ピストン２６はシリンダケース２５の蓋部２
５Ａとの間にエア室Ａを画成し、弁体２４との間にはシ
リンダケース２５内に位置して後述のコイルばね２７が
収容されるばね室Ｂを画成している。Reference numeral 26 denotes a piston slidably fitted in the cylinder case 25. The piston 26 has a boss portion 26B having an insertion hole 26A formed in the center thereof, and the boss portion 26B has an insertion hole 26A. Through the male screw portion 23 of the valve shaft 23
It is fixed to the B side with a nut or the like. Also, the piston 2
6, the outer peripheral side of the boss portion 26B is a cylindrical sliding contact portion 26C, and the cylinder case 25 slides up and down along the outer peripheral side of the sliding contact portion 26C.
Then, the piston 26 is the lid portion 2 of the cylinder case 25.
5A, an air chamber A is defined, and between the valve body 24 and a spring chamber B, which is located in the cylinder case 25 and accommodates a coil spring 27 described later, is defined.

【００２７】２７は弁体２４とピストン２６との間に配
設された弁ばねとしてのコイルばねを示し、該コイルば
ね２７は弁軸２３の外周側に挿通するようにしてばね室
Ｂに収容され、弁体２４を給排ポ−ト２２の弁座部２２
Ｃに向け常時閉弁方向に付勢している。Reference numeral 27 denotes a coil spring as a valve spring arranged between the valve body 24 and the piston 26, and the coil spring 27 is accommodated in the spring chamber B so as to be inserted into the outer peripheral side of the valve shaft 23. The valve body 24 is connected to the valve seat portion 22 of the supply / discharge port 22.
The valve is always biased toward C toward the valve closing direction.

【００２８】２８はタンク本体１の油室３内に位置し、
シリンダケース２５の周囲を取囲むフィルタを示し、該
フィルタ２８は金網等から上部を蓋部２８Ａで閉塞する
ように有蓋筒状に形成され、油室３内でシリンダケース
２５を上側から覆うように、下端側が給排ポ−ト２２の
筒状突起２２Ｂに図示しないビス等を介して取付けられ
ている。28 is located in the oil chamber 3 of the tank body 1,
A filter surrounding the cylinder case 25 is shown. The filter 28 is formed in a cylindrical shape with a lid 28A so as to close the upper part from a metal net or the like, and covers the cylinder case 25 from the upper side in the oil chamber 3. The lower end side is attached to the cylindrical projection 22B of the supply / discharge port 22 via a screw or the like not shown.

【００２９】２９はエア供給手段としてのエアコンプレ
ッサ、３０は該エアコンプレッサ２９と給排弁２１の弁
軸２３の基端側とを接続する配管３１の途中に設けられ
た三方弁を示し、該三方弁３０を回転操作することによ
って弁軸２３の軸穴２３Ｃをエアコンプレッサ２９側ま
たは大気側に切換え接続するようになっている。Reference numeral 29 denotes an air compressor as an air supply means, 30 denotes a three-way valve provided in the middle of a pipe 31 connecting the air compressor 29 and the base end side of the valve shaft 23 of the supply / discharge valve 21, By rotating the three-way valve 30, the shaft hole 23C of the valve shaft 23 is switched and connected to the air compressor 29 side or the atmosphere side.

【００３０】給排弁２１は以上に述べた構成を有するも
ので、該給排弁２１は三方弁３０を操作して弁軸２３の
基端側からシリンダケース２５のエア室Ａ内に圧縮空気
としてのエアを供給すると、エア室Ａ内のエア圧により
シリンダケース２５を上向きに押圧する。この場合、ピ
ストン２６は弁軸２３によって給排ポート２２に固定さ
れているから、シリンダケース２５はピストン２６の摺
接部２６Ｃに摺接しつつ蓋部２５Ａが図１中に二点鎖線
で示す位置まで上昇する。そして、シリンダケース２５
の開口部２５Ｂ側に締着された弁体２４はシリンダケー
ス２５と共に上昇して弁座部２２Ｃから離座して開弁
し、タンク本体１内の油液は、フィルタ２８を介して給
排ポ−ト２２の接続部２２Ｅ側から排出される。The supply / discharge valve 21 has the structure described above. The supply / discharge valve 21 operates the three-way valve 30 to supply compressed air from the base end side of the valve shaft 23 into the air chamber A of the cylinder case 25. The air pressure in the air chamber A pushes the cylinder case 25 upward. In this case, since the piston 26 is fixed to the supply / discharge port 22 by the valve shaft 23, the cylinder case 25 is in sliding contact with the sliding contact portion 26C of the piston 26 while the lid portion 25A is at the position shown by the chain double-dashed line in FIG. Rise to. And the cylinder case 25
The valve body 24 fastened to the opening 25B side of the tank rises together with the cylinder case 25 and separates from the valve seat portion 22C to open the valve, and the oil liquid in the tank body 1 is supplied and discharged via the filter 28. It is discharged from the connection portion 22E side of the port 22.

【００３１】一方、タンク本体１内に油液を供給するに
は、給排ポ−ト２２の接続部２２Ｅ側に供給パイプ等を
接続し、弁軸２３にエア圧を導入して給排弁２１を開弁
させた状態で給排ポート２２の接続部２２Ｅ側から図示
しないポンプ等で油液を圧送する。On the other hand, in order to supply the oil liquid into the tank main body 1, a supply pipe or the like is connected to the connecting portion 22E side of the supply / discharge port 22, and air pressure is introduced into the valve shaft 23 to supply / discharge the valve. With the valve 21 opened, the oil liquid is pressure-fed from the connection portion 22E side of the supply / discharge port 22 by a pump or the like not shown.

【００３２】このとき、給排ポ−ト２２の弁座部２２Ｃ
は内径Ｄ1 がシリンダケース２５の内径Ｄ2 よりも小さ
く形成されていることから、単に接続部２２Ｅ側に供給
パイプ等を接続して接続部２２Ｅ側から油液を圧送して
も、弁体２４の貫通穴２４Ｃを介して油液がばね室Ｂ内
に充填され、弁体２４は上，下の受圧面積の差により、
弁座部２２Ｃ上に押付けられて開弁することはなく、弁
軸２３の基端側からエア圧を導入したときにのみ弁体２
４は開弁するようになる。このため、例えば、異なる種
類の油液を同一の油室３内に積載してしまうような過失
を防ぎ、作業の慎重を期すことに役立つと共に、緊急に
タンク本体１への積載を打ち切る場合等には三方弁３０
の切換え操作だけで油液の給排を簡単に中止できる。At this time, the valve seat portion 22C of the supply / discharge port 22
Since the inner diameter D1 is smaller than the inner diameter D2 of the cylinder case 25, even if a supply pipe or the like is simply connected to the connecting portion 22E side and the oil liquid is pumped from the connecting portion 22E side, The oil liquid is filled in the spring chamber B through the through hole 24C, and the valve body 24 has a difference in pressure receiving area between the upper and lower portions.
The valve body 2 is not pressed against the valve seat portion 22C to open, and only when the air pressure is introduced from the base end side of the valve shaft 23
4 will open the valve. For this reason, for example, it is possible to prevent accidents such as loading different types of oil liquids in the same oil chamber 3 and to be careful of the work, and to terminate the loading on the tank body 1 urgently. There is a three-way valve 30
It is possible to easily stop the supply and discharge of oil liquid simply by switching the operation.

【００３３】次に、３２はタンク本体１の上部１Ｂに各
油室３毎に配設された空気導入弁を示し、該空気導入弁
３２は図３に示す如く、後述のバルブ本体３３および該
バルブ本体３３内に配設される後述の主弁体３５等から
大略構成されている。Next, reference numeral 32 denotes an air introducing valve provided for each oil chamber 3 in the upper portion 1B of the tank main body 1. The air introducing valve 32 is, as shown in FIG. The valve main body 33 is generally composed of a main valve body 35 and the like which will be described later.

【００３４】３３はタンク本体１の上部１Ｂに取付けら
れたバルブ本体を示し、該バルブ本体３３は段付筒状の
筒部３３Ａと、該筒部３３Ａの下側で筒部３３Ａの内部
を上，下に画成する厚肉の底部３３Ｂとから略有底筒状
に形成され、該底部３３Ｂの中央には軸方向に弁軸挿通
穴３３Ｃが、該弁軸挿通穴３３Ｃの径方向外側には通気
穴３３Ｄが穿設されている。また、該バルブ本体３３に
は、底部３３Ｂの径方向外側から底部３３Ｂの中心に向
けてエア導入孔３３Ｅが穿設され、該エア導入孔３３Ｅ
の先端側は前記弁軸挿通穴３３Ｃを介して後述の弁軸３
４内へと連通し、基端側にはエアコンプレッサ２９から
の配管３１Ａに接続される接続部３３Ｅ1 が形成されて
いる。また、筒部３３Ａの内周側には底部３３Ｂから所
定寸法上側に位置して環状の弁座部３３Ｆが形成され、
該弁座部３３Ｆには主弁体３５が離着座するようになっ
ている。筒部３３Ａの上部側は薄肉に形成され、その径
方向には通気窓３３Ｇが穿設されている。Reference numeral 33 denotes a valve body mounted on the upper portion 1B of the tank body 1. The valve body 33 has a cylindrical portion 33A having a stepped shape, and the inside of the cylindrical portion 33A is located below the cylindrical portion 33A. , A bottom portion 33B having a thick wall, which is defined below, is formed into a substantially bottomed tubular shape, and a valve shaft insertion hole 33C is axially formed in the center of the bottom portion 33B, and is located radially outward of the valve shaft insertion hole 33C. Has a ventilation hole 33D. Further, the valve body 33 is provided with an air introduction hole 33E from the outside of the bottom portion 33B in the radial direction toward the center of the bottom portion 33B.
The tip end side of the valve shaft 3 is described later through the valve shaft insertion hole 33C.
4, a connecting portion 33E1 is formed on the base end side thereof and is connected to the pipe 31A from the air compressor 29. An annular valve seat portion 33F is formed on the inner peripheral side of the cylindrical portion 33A so as to be located above the bottom portion 33B by a predetermined dimension.
The main valve element 35 is seated on and off the valve seat portion 33F. The upper side of the cylindrical portion 33A is formed thin, and a ventilation window 33G is bored in the radial direction thereof.

【００３５】３４は前記バルブ本体３３の底部３３Ｂ
に、弁軸挿通穴３３Ｃに嵌着して固着された弁軸を示
し、該弁軸３４には、上端側から下向きに途中部位まで
伸び、軸中心に形成された軸穴３４Ａと、該弁軸３４の
下端側で前記バルブ本体３３のエア導入孔３３Ｅを軸穴
３４Ａと連通するように径方向に伸びる横穴３４Ｂとが
穿設されている。Reference numeral 34 is a bottom portion 33B of the valve body 33.
Shows the valve shaft fitted and fixed in the valve shaft insertion hole 33C. The valve shaft 34 has a shaft hole 34A extending from the upper end side downward to an intermediate part and formed at the shaft center, and the valve shaft 34A. A lateral hole 34B extending in the radial direction is formed on the lower end side of the shaft 34 so that the air introduction hole 33E of the valve body 33 communicates with the shaft hole 34A.

【００３６】３５は弁軸３４に摺動可能に取付けられた
主弁体を示し、該主弁体３５は、有蓋筒状に形成され、
前記弁軸３４の外周に摺動可能に挿嵌された筒状弁軸３
５Ａと、該筒状弁軸３５Ａの長さ方向中間部から径方向
外向きに延設され、円板状に形成された弁板３５Ｂとか
ら構成され、該弁板３５Ｂには上下方向に通気孔３５Ｃ
が穿設されている。そして、該主弁体３５の筒状弁軸３
５Ａ内と弁軸３４上端との間にはエア室Ｃが画成されて
いる。Reference numeral 35 denotes a main valve body slidably attached to the valve shaft 34, and the main valve body 35 is formed in a cylindrical shape with a cover,
Cylindrical valve shaft 3 slidably fitted around the outer circumference of the valve shaft 34
5A and a disc-shaped valve plate 35B that extends radially outward from the longitudinal middle portion of the tubular valve shaft 35A, and passes vertically through the valve plate 35B. Pore 35C
Has been drilled. Then, the cylindrical valve shaft 3 of the main valve body 35
An air chamber C is defined between the inside of 5A and the upper end of the valve shaft 34.

【００３７】３６は補助弁体を示し、該補助弁体３６は
短尺な筒状のボス部３６Ａと、該ボス部３６Ａの上端部
から径方向外向きに延設され、円板状をなす弁板部３６
Ｂとから構成され、該補助弁体３６はボス部３６Ａを前
記主弁体３５の筒状弁軸３５Ａに下端側から装着するこ
とにより、該筒状弁軸３５Ａの外周側に摺動可能に挿嵌
されている。そして、該補助弁体３６は、バルブ本体３
３の底部３３Ｂと弁板部３６Ｂとの間で、ボス部３６Ａ
の外周側に設けられた弁ばね３７によって前記主弁体３
５に向けて常時付勢され、該主弁体３５の通気孔３５Ｃ
を弁板部３６Ｂによって閉じるようになっている。Reference numeral 36 denotes an auxiliary valve body. The auxiliary valve body 36 is a short cylindrical boss portion 36A, and a disk-shaped valve extending radially outward from the upper end of the boss portion 36A. Board 36
The auxiliary valve body 36 is slidable on the outer peripheral side of the tubular valve shaft 35A by mounting the boss portion 36A on the tubular valve shaft 35A of the main valve body 35 from the lower end side. It is inserted. The auxiliary valve body 36 is the valve body 3
The boss portion 36A between the bottom portion 33B of 3 and the valve plate portion 36B.
The main valve body 3 by means of a valve spring 37 provided on the outer peripheral side of
5 is always urged toward the air vent hole 35C of the main valve body 35.
Is closed by the valve plate portion 36B.

【００３８】３８は主弁体３５の弁ばねを示し、該弁ば
ね３８は前記主弁体３５の弁板３５Ｂの上側で筒状弁軸
３５Ａの外側に位置し、バルブ本体３３の筒部３３Ａ上
端内側に螺着された円板状のばね受け３９と弁板３５Ｂ
の周縁部との間に配設され、前記主弁体３５を常時下向
きに付勢して、弁板部３５Ｂをバルブ本体３３の弁座部
３３Ｆに着座させるようになっている。Reference numeral 38 denotes a valve spring of the main valve body 35. The valve spring 38 is located on the upper side of the valve plate 35B of the main valve body 35 and outside the cylindrical valve shaft 35A, and the cylindrical portion 33A of the valve body 33. A disk-shaped spring receiver 39 and a valve plate 35B screwed to the inside of the upper end.
The main valve body 35 is always biased downward so that the valve plate portion 35B is seated on the valve seat portion 33F of the valve body 33.

【００３９】４０はバルブ本体３３の底部３３Ｂとエア
導入孔３３Ｅとの間に配設された逆止弁を示し、該逆止
弁４０はエア導入孔３３Ｅ側からのエアがバルブ本体３
３の筒部３３Ａ内に流入するを阻止し、逆向きの流れを
許すようになっている。Reference numeral 40 denotes a check valve disposed between the bottom portion 33B of the valve body 33 and the air introducing hole 33E. The check valve 40 has a structure in which the air from the air introducing hole 33E side is the valve body 3
It is designed to block the flow into the cylindrical portion 33A of No. 3 and allow the flow in the opposite direction.

【００４０】４１はバルブ本体３３の上端部を覆うよう
に設けられたカバーを示し、該カバー４１は有蓋筒状に
形成され、筒部３３Ａの通気窓３３Ｇとの間に一定の隙
間が形成されるように、開口端側に中ぐり部４１Ａが形
成されている。Reference numeral 41 denotes a cover provided so as to cover the upper end portion of the valve body 33. The cover 41 is formed in a cylindrical shape with a lid, and a constant gap is formed between the cylindrical portion 33A and the ventilation window 33G. Thus, the boring portion 41A is formed on the opening end side.

【００４１】空気導入弁３２は以上に述べた構成を有す
るもので、該空気導入弁３２には図２，３に示す如く、
前記給排弁２１の弁軸２３に接続される配管３１から分
岐し、タンク本体１の外壁に沿って配設された配管３１
Ａが接続部３３Ｅ1 に接続されるようになっている。The air introducing valve 32 has the above-mentioned structure. As shown in FIGS.
A pipe 31 branched from a pipe 31 connected to the valve shaft 23 of the supply / discharge valve 21 and arranged along the outer wall of the tank body 1.
A is connected to the connecting portion 33E1.

【００４２】そして、エアが配管３１Ａよりエア導入孔
３３Ｅを介してエア室Ｃ内に導入されると、そのエア圧
によって弁軸３４の上方に支持された主弁体３５の筒状
弁軸３５Ａが補助弁体３６と共に上側に押し上げられ、
主弁体３５は弁座部３３Ｆから離座して通気窓３３Ｇと
通気穴３３Ｄとを連通させる。これにより、タンク本体
１の油室３内に大気を導入でき、油室３内が油液の排出
時に負圧となるのを防止できる。When air is introduced into the air chamber C from the pipe 31A through the air introduction hole 33E, the air pressure thereof causes the cylindrical valve shaft 35A of the main valve body 35 supported above the valve shaft 34. Is pushed upward together with the auxiliary valve body 36,
The main valve body 35 separates from the valve seat portion 33F and connects the ventilation window 33G and the ventilation hole 33D. As a result, the atmosphere can be introduced into the oil chamber 3 of the tank body 1, and the inside of the oil chamber 3 can be prevented from becoming a negative pressure when the oil liquid is discharged.

【００４３】一方、三方弁３０を大気側に切換え、空気
導入弁３２のエア室Ｃおよびエア導入孔３３Ｅ内の圧力
を大気圧まで低下させると、主弁体３５は弁ばね３８に
付勢されて弁座部３３Ｆに着座し、空気導入弁３２を閉
弁させる。かくして、前記給排弁２１と空気導入弁３２
は単一の操作によってを同時に開，閉弁することができ
る。On the other hand, when the three-way valve 30 is switched to the atmosphere side and the pressure in the air chamber C of the air introducing valve 32 and the air introducing hole 33E is reduced to atmospheric pressure, the main valve body 35 is urged by the valve spring 38. And seats on the valve seat portion 33F to close the air introduction valve 32. Thus, the supply / discharge valve 21 and the air introduction valve 32
Can be opened and closed simultaneously with a single operation.

【００４４】また、空気導入弁３２は、例えば液体運搬
時にタンク本体１が日射等によって高温となり、油室３
内の圧力が上昇したときには、逆止弁４０が図３に示す
如く開弁し、タンク本体１内から通気穴３３Ｄを介して
エア導入孔３３Ｅ側に油室３内のエア等を逃がし、配管
３１Ａから三方弁３０より大気に放出するように動作す
る。そして、逆にタンク本体１内が低温となって圧力が
下がると、補助弁体３６が弁ばね３７に抗して下側に移
動し、通気窓３３Ｇ，通気孔３５Ｃを介して大気圧側と
タンク本体１内とを連通し、外気をタンク本体１内に導
入させる。In addition, the air introduction valve 32 is heated to a high temperature due to the solar radiation of the tank body 1 when, for example, liquid is conveyed, and the oil chamber 3
When the internal pressure rises, the check valve 40 opens as shown in FIG. 3, and the air in the oil chamber 3 escapes from the inside of the tank body 1 to the air introduction hole 33E side through the ventilation hole 33D, and the piping It operates so as to release from 31A to the atmosphere through the three-way valve 30. On the contrary, when the temperature in the tank main body 1 becomes low and the pressure drops, the auxiliary valve body 36 moves downward against the valve spring 37, and becomes the atmospheric pressure side through the ventilation window 33G and the ventilation hole 35C. The inside of the tank body 1 is communicated with and the outside air is introduced into the tank body 1.

【００４５】以上説明した通り、本実施例では、タンク
本体１の底部１Ａに油室３内と連通するように略Ｌ字管
状の給排ポ−ト２２を設け、該給排ポ−ト２２には屈曲
部２２Ｄの下部側に位置して厚肉のボス部２２Ｆを形成
し、該ボス部２２Ｆ内には弁座部２２Ｃの中心部を上向
きに伸長するように中空の弁軸２３を挿通して固定し、
該弁軸２３の先端側には弁座部２２Ｃの上方に位置して
外周側が筒状の摺接部２６Ｃとなったピストン２６を設
け、該ピストン２６には該ピストン２６の摺接部２６Ｃ
の外周側で摺動する有蓋筒状のシリンダケース２５を挿
嵌して、該シリンダケース２５内にエア室Ａとばね室Ｂ
を画成し、該シリンダケース２５の開口部２５Ｂ側には
該シリンダケース２５と共に弁座部２２Ｃに離着座して
開，閉弁を行い、ボス部２４Ｂが弁軸２３の外周に摺動
可能に挿嵌された弁体２４を固定し、シリンダケース２
５のばね室Ｂ内には該弁体２４とピストン２６との間に
コイルばね２７を配設して給排弁２１を構成するように
したから、下記のような作用効果を得ることができる。As described above, in the present embodiment, a substantially L-shaped tubular supply / discharge port 22 is provided at the bottom portion 1A of the tank body 1 so as to communicate with the inside of the oil chamber 3, and the supply / discharge port 22 is provided. Is formed on the lower side of the bent portion 22D to form a thick boss portion 22F, and a hollow valve shaft 23 is inserted into the boss portion 22F so as to extend the central portion of the valve seat portion 22C upward. And fix it,
A piston 26, which is located above the valve seat portion 22C and has a cylindrical sliding contact portion 26C on the outer peripheral side, is provided on the tip end side of the valve shaft 23, and the piston 26 has a sliding contact portion 26C of the piston 26.
A cylindrical cylinder case 25 with a lid, which slides on the outer peripheral side, is inserted and fitted into the cylinder case 25.
The opening 25B of the cylinder case 25 is seated on and off the valve seat 22C together with the cylinder case 25 to open and close the valve, and the boss 24B can slide on the outer periphery of the valve shaft 23. The valve body 24 inserted in the
Since the coil spring 27 is arranged in the spring chamber B of No. 5 between the valve body 24 and the piston 26 to configure the supply / discharge valve 21, the following operational effects can be obtained. .

【００４６】即ち、該給排弁２１は弁軸２３の基端側か
らシリンダケース２５のエア室Ａ内にエアを供給するこ
とにより、弁体２４を弁座部２２Ｃから簡単に離座させ
て開弁でき、タンク本体１内に油液を給排させることが
できるので、従来技術のように作業員がタンク本体１に
登ることなく、タンク本体１の下側から給排弁２１の開
閉作業を行うことができる上に、従来技術のように緊急
用の補助弁１０を設ける必要がなくなり、構造を単純化
できる。That is, the supply / discharge valve 21 supplies air from the base end side of the valve shaft 23 into the air chamber A of the cylinder case 25 to easily separate the valve body 24 from the valve seat portion 22C. Since the valve can be opened and the oil liquid can be supplied to and discharged from the tank body 1, the operator can open and close the supply / discharge valve 21 from the lower side of the tank body 1 without climbing the tank body 1 as in the prior art. In addition to the above, it is not necessary to provide the auxiliary valve 10 for emergency as in the prior art, and the structure can be simplified.

【００４７】また、弁体２４を弁軸２３に摺動可能に取
付け、該弁軸２３の先端に固着したピストン２６の摺接
部２６Ｃに対してシリンダケース２５を摺動可能に挿嵌
し、該シリンダケース２５の開口部２５Ｂに弁体２４を
固着しているので、弁体２４およびシリンダケース２５
を弁軸２３およびピストン２６により安定して支持で
き、弁体２４を弁座部２２Ｃに対して正対させるように
配設でき、弁体２４の開弁時にタンク本体１内の油液が
漏洩するのを確実に防止できる。そして、フィルタ２８
の蓋部２８Ａ側等にシリンダケース２５用のガイド等を
設ける必要がなくなり、フィルタ２８の構造を簡略化で
きる。Further, the valve body 24 is slidably attached to the valve shaft 23, and the cylinder case 25 is slidably inserted into the sliding contact portion 26C of the piston 26 fixed to the tip of the valve shaft 23. Since the valve body 24 is fixed to the opening 25B of the cylinder case 25, the valve body 24 and the cylinder case 25
Can be stably supported by the valve shaft 23 and the piston 26, and the valve body 24 can be arranged so as to face the valve seat portion 22C. When the valve body 24 opens, the oil liquid in the tank body 1 leaks. It can be surely prevented. Then, the filter 28
It is not necessary to provide a guide or the like for the cylinder case 25 on the lid portion 28A side or the like, and the structure of the filter 28 can be simplified.

【００４８】一方、シリンダケース２５の外部に位置し
て、例えばフィルタ２８の蓋部２８Ａとの間に弁ばねを
設けるようにした場合には、該弁ばねをシリンダケース
２５との間で保持すべく、例えば従来技術で述べたカバ
ー６のようにフィルタ２８を頑丈な構造とする必要が生
じ、フィルタ２８を含めた給排弁２１全体が大型化して
しまう。しかし、本実施例による給排弁２１は、弁ばね
としてのコイルばね２７を弁体２４とピストン２６との
間でシリンダケース２５内に設けているので、コイルば
ね２７をシリンダケース２５内にコンパクトに収容で
き、フィルタ２８を金網等で簡素な構造に形成できる上
に、給排弁２１全体を小型に構成でき、タンク本体１に
対する組み付けの自由度を高めることができる。また、
フィルタ２８に替えて頑丈な構造のカバー（図８中のカ
バー６参照）を用いた場合には、このカバーにより流路
面積が小さく制限されてしまう。これに対して、本実施
例では、金網等で簡素な構造に形成したフィルタ２８を
使用できるから、該フィルタ２８の前，後を流れる油液
の流路面積を大きく広げることができ、給排弁２１を開
弁したときに油液の給排量を増大できると共に、油液の
給排作業を短時間で迅速に行うことが可能となる。 Meanwhile, it located outside the cylinder case 25, when the so that provided <br/> a valve spring between the lid portion 28A of the example filter 28, cylinder case the valve spring
In order to maintain the temperature between the cover and the
Necessary raw to the filter 28 and the sturdy structure as over 6
Flip entire Kyuhaiben 21 including the filter 28 becomes large. However, Kyuhaiben 2 1 according to the present embodiment, since the provided in the cylinder casing 25 between the valve body 24 and the piston 26 a coil spring 27 as a valve spring, a coil spring 27 in the cylinder case 25 can accommodate compactly, the filter 28 on it can be formed into a simple structure with a wire mesh or the like, can compact to the configuration of the entire Kyuhaiben 21, it is possible to increase the freedom of assembly for the tank body 1. Also,
Instead of the filter 28, a sturdy cover (see the cover in FIG. 8).
(See bar 6)
The area is limited to a small area. In contrast, this implementation
In the example, the filter 28 having a simple structure such as a wire mesh is used.
Since it can be used, the oil liquid flowing in front of and behind the filter 28
The flow passage area of can be greatly expanded, and the supply / discharge valve 21 can be opened.
When the valve is opened, the amount of oil supply and discharge can be increased, and the oil
It is possible to quickly perform the supply / discharge work in a short time.

【００４９】さらに、本実施例では、タンク本体１の上
部１Ｂに、給排弁２１側と同系統の配管３１Ａからエア
が導入され、給排弁２１と同時に開，閉弁する空気導入
弁３２を設けたから、タンク本体１に油液の給排を行う
ときには、タンク本体１の底部１Ａ側で三方弁３０を操
作するだけで、給排弁２１と空気導入弁３２を同時に開
弁でき、油液の給排をスムーズに行うことができる。ま
た、タンク本体１内が過剰な高圧または負圧になったと
きには空気導入弁３２の逆止弁４０、補助弁体３６が開
弁してタンク本体１内を大気圧状態に保持でき、安全を
確保できる等、種々の効果を奏する。Further, in the present embodiment, air is introduced into the upper portion 1B of the tank body 1 from the pipe 31A of the same system as the supply / discharge valve 21 side, and the air introduction valve 32 is opened / closed simultaneously with the supply / discharge valve 21. Therefore, when the oil liquid is supplied to or discharged from the tank body 1, the supply / discharge valve 21 and the air introduction valve 32 can be simultaneously opened by operating the three-way valve 30 on the bottom 1A side of the tank body 1. It is possible to smoothly supply and drain the liquid. Further, when the inside of the tank body 1 becomes excessively high pressure or negative pressure, the check valve 40 of the air introduction valve 32 and the auxiliary valve body 36 are opened to keep the inside of the tank body 1 at the atmospheric pressure state. Various effects such as securing can be achieved.

【００５０】次に、図４ないし図６は本考案の第２の実
施例を示し、本実施例では前記第１の実施例と同一の構
成要素に同一符号を付しその説明を省略するものとする
に、本実施例の特徴は、タンク本体の底部に設けた給排
弁とタンク本体の上部に設けた空気導入弁とを自在継手
で接続し、各弁の開閉動作を同時に行うようにしたこと
にある。Next, FIGS. 4 to 6 show a second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals and their description is omitted. However, the feature of this embodiment is that a supply / discharge valve provided at the bottom of the tank body and an air introduction valve provided at the top of the tank body are connected by a universal joint so that the opening and closing operations of each valve are performed simultaneously. There is something I did.

【００５１】図中、５１はタンク本体１の底部１Ａに設
けた給排弁を示し、該給排弁５１は前記第１の実施例で
述べた給排弁２１とほぼ同様に、給排ポ−ト２２，弁軸
２３，弁体２４およびピストン２６等から大略構成され
るものの、該給排弁５１は、シリンダケース５２の蓋部
５２Ａの中央部分が厚肉に形成され、該蓋部５２Ａには
プッシュロッド５３の下端が固定され、該プッシュロッ
ド５３はフィルタ２８の蓋部２８Ａを貫通してタンク本
体１内を上向きに伸長している。In the figure, reference numeral 51 denotes a supply / discharge valve provided at the bottom portion 1A of the tank main body 1, and the supply / discharge valve 51 is similar to the supply / discharge valve 21 described in the first embodiment. The intake / discharge valve 51 has a central portion of a lid portion 52A of a cylinder case 52 formed to be thick, and the lid portion 52A is formed of a valve 22, a valve shaft 23, a valve body 24, a piston 26, and the like. The lower end of a push rod 53 is fixed to the push rod 53, and the push rod 53 penetrates the lid portion 28A of the filter 28 and extends upward in the tank body 1.

【００５２】５４はタンク本体１の上部１Ｂに設けた空
気導入弁を示し、該空気導入弁５４は、後述のバルブ本
体５５と、筒状弁体５６、補助弁体５７等から大略構成
されている。Reference numeral 54 denotes an air introduction valve provided in the upper portion 1B of the tank main body 1. The air introduction valve 54 is roughly composed of a valve main body 55 described later, a cylindrical valve body 56, an auxiliary valve body 57 and the like. There is.

【００５３】５５はバルブ本体を示し、該バルブ本体５
５は図６に示す如く、略Ｌ字管状に形成され、上下方向
に伸びる一側筒部５５Ａと、該一側筒部５５Ａの上端側
から該一側筒部５５Ａと直交するように延設された他側
筒部５５Ｂとから構成されている。ここで、一側筒部５
５Ａの下端側はタンク本体１の上部１Ｂに油室３内と連
通して固着され、その内周側には上向きに突出した環状
の弁座部５５Ｃが形成されている。また、一側筒部５５
Ａと弁座部５５Ｃの中間には、軸方向に伸長する筒状の
バルブガイド５５Ｄが上向きに伸長して設けられ、該バ
ルブガイド５５Ｄには、複数の通気溝５５Ｄ1 （１本の
み図示）が周方向に隔設されている。また、一側筒部５
５Ａの下端側には、中央部に位置して筒状の軸受部５５
Ｅが一体形成され、該軸受部５５Ｅは板状の連結部５５
Ｆ，５５Ｆによって支持されている。Reference numeral 55 indicates a valve body, and the valve body 5
As shown in FIG. 6, 5 is formed in a substantially L-shaped tubular shape, and has one side tubular portion 55A extending in the vertical direction and extending from the upper end side of the one side tubular portion 55A so as to be orthogonal to the one side tubular portion 55A. The other side tubular portion 55B is formed. Here, the one side tube portion 5
The lower end side of 5A is fixed to the upper portion 1B of the tank body 1 so as to communicate with the inside of the oil chamber 3, and an annular valve seat portion 55C protruding upward is formed on the inner peripheral side thereof. In addition, the one side tubular portion 55
A tubular valve guide 55D extending in the axial direction is provided in the middle between A and the valve seat portion 55C so as to extend upward, and a plurality of ventilation grooves 55D1 (only one is shown) are provided in the valve guide 55D. It is separated in the circumferential direction. In addition, the one side tubular portion 5
On the lower end side of 5A, a cylindrical bearing portion 55 located in the center is provided.
E is integrally formed, and the bearing portion 55E is a plate-like connecting portion 55.
It is supported by F and 55F.

【００５４】５６は前記バルブガイド５５Ｄ内に摺動可
能に設けられた筒状弁体を示し、該筒状弁体５６は有底
筒状に形成され、内側に複数の通気路５６Ａ，５６Ａ，
…を有する環状底部５６Ｂと、該環状底部５６Ｂの外周
側から上向きに伸長する筒状の摺接部５６Ｃと、該摺接
部５６Ｃの径方向内側に位置し、摺接部５６Ｃと同軸上
に設けられた筒状の軸受部５６Ｄと、該軸受部５６Ｄの
外周側から径方向外側に向けて放射状に伸長し、環状底
部５６Ｂの内周側と軸受部５６Ｄとを連結する連結部５
６Ｅ，５６Ｅ，…とから構成され、該各連結部５６Ｅ間
は通気路５６Ａとなっている。Reference numeral 56 denotes a tubular valve body slidably provided in the valve guide 55D. The tubular valve body 56 is formed in a bottomed tubular shape and has a plurality of ventilation passages 56A, 56A inside.
Has an annular bottom portion 56B, a cylindrical slidable contact portion 56C extending upward from the outer peripheral side of the annular bottom portion 56B, and a radial inner side of the slidable contact portion 56C, coaxial with the slidable contact portion 56C. The cylindrical bearing portion 56D provided and the connecting portion 5 that radially extends from the outer peripheral side of the bearing portion 56D toward the outer side in the radial direction and connects the inner peripheral side of the annular bottom portion 56B and the bearing portion 56D.
6E, 56E, ..., And a ventilation path 56A is provided between the respective connecting portions 56E.

【００５５】５７は前記筒状弁体５６の中央に設けられ
た補助弁体を示し、該補助弁体５７は、円板状の弁板５
７Ａと、該弁板５７Ａの中央から上向きに突設された弁
軸５７Ｂとによって大略構成され、該補助弁体５７の弁
軸５７Ｂは前記筒状弁体５６の軸受部５６Ｄに挿通され
ている。そして、弁軸５７Ｂは上端側に形成した雄ねじ
部５７Ｂ1 に円板状のばね受け５７Ｃを挿通し、該ばね
受け５７Ｃをナット５７Ｄで固定することによって抜止
されている。Reference numeral 57 denotes an auxiliary valve body provided in the center of the cylindrical valve body 56, and the auxiliary valve body 57 is a disc-shaped valve plate 5
7A and a valve shaft 57B that projects upward from the center of the valve plate 57A, and the valve shaft 57B of the auxiliary valve body 57 is inserted into the bearing portion 56D of the tubular valve body 56. . The valve shaft 57B is prevented from coming off by inserting a disc-shaped spring bearing 57C into a male screw portion 57B1 formed on the upper end side and fixing the spring bearing 57C with a nut 57D.

【００５６】５８は前記補助弁体５７の弁軸５７Ｂの外
周側に位置し、ばね受け５７Ｃと筒状弁体５６の軸受部
５６Ｄとの間に配設された弁ばねを示し、該弁ばね５８
はばね受け５７Ｃを上向きに付勢することにより、弁軸
５７Ｂを介して弁板５７Ａを常時筒状弁体５６の環状底
部５６Ｂ側に当接させ、該弁板５７Ａによって通気路５
６Ａを閉じるようになっている。Reference numeral 58 denotes a valve spring located on the outer peripheral side of the valve shaft 57B of the auxiliary valve body 57 and arranged between the spring receiver 57C and the bearing portion 56D of the tubular valve body 56. 58
Urges the spring receiver 57C upward so that the valve plate 57A is always brought into contact with the annular bottom portion 56B side of the tubular valve body 56 via the valve shaft 57B, and the valve plate 57A allows the ventilation passage 5
It is designed to close 6A.

【００５７】５９はバルブ本体５５の一側筒部５５Ａ上
端側に螺着された円板状のばね受けを示し、該ばね受け
５９の下側には、前記筒状弁体５６の環状底部５６Ｂ上
面との間に弁ばね６０が配設され、該弁ばね６０によっ
て筒状弁体５６はバルブ本体５５の弁座部５５Ｃに向け
て常時閉弁方向に付勢されている。そして、蓋体６１に
より、一側筒部５５Ａの上端側が前記ばね受け５９の上
側から施蓋されている。Reference numeral 59 denotes a disc-shaped spring bearing screwed to the upper end side of the one side tubular portion 55A of the valve body 55, and below the spring bearing 59 is the annular bottom portion 56B of the tubular valve body 56. A valve spring 60 is arranged between the upper surface and the upper surface, and the valve spring 60 normally urges the tubular valve element 56 toward the valve seat 55C of the valve body 55 in the valve closing direction. The lid 61 covers the upper end of the one-side tubular portion 55A from above the spring receiver 59.

【００５８】６２はバルブ本体５５の下端側で軸受部５
５Ｅに挿通されたプッシュロッドを示し、該プッシュロ
ッド６２の上端には平坦な円板状の当接板６２Ａが設け
られ、該当接板６２Ａは補助弁体５７を介して筒状弁体
５６を上向きに押動するようになっている。また、該プ
ッシュロッド６２の下端側はタンク本体１の油室３内へ
と下向きに伸長し、前記給排弁５１のプッシュロッド５
３との間に図示しない自在継手を介して接続されてい
る。そして、該プッシュロッド６２はプッシュロッド５
３を介して上向きに押動されるようになっている。Reference numeral 62 denotes the lower end of the valve body 55, which is the bearing portion 5.
5E shows a push rod inserted through 5E, and a flat disc-shaped contact plate 62A is provided at the upper end of the push rod 62, and the contact plate 62A connects the cylindrical valve body 56 via the auxiliary valve body 57. It is designed to push upward. Further, the lower end side of the push rod 62 extends downward into the oil chamber 3 of the tank main body 1, and the push rod 5 of the supply / discharge valve 51.
3 is connected via a universal joint (not shown). The push rod 62 is the push rod 5
It is designed to be pushed upwards via 3.

【００５９】本実施例は以上に述べた構成を有するもの
で、タンク本体１に油液の給排を行うときには、前記第
１の実施例で説明したのと同様に、給排弁５１の弁軸２
３の基端側にエア圧を導入することにより給排弁５１の
開弁操作を行う。そして、このとき、シリンダケース５
２が図５中に二点鎖線で示す如く上昇すると、該シリン
ダケース５２に固定されたプッシュロッド５３は自在継
手を介して空気導入弁５４側のプッシュロッド６２を上
側に押動するようになる。そして、該プッシュロッド６
２は、図６中に二点鎖線で示す如く当接板６２Ａによっ
て補助弁体５７の弁板５７Ａを上側に押圧し、弁ばね６
０に抗して筒状弁体を弁座部５５Ｃから離座させ、他側
筒部５５Ｂとタンク本体１内を各通気溝５５Ｄ1 を介し
て連通させるようになっている。This embodiment has the structure described above. When the oil liquid is supplied to or discharged from the tank body 1, the valve of the supply / discharge valve 51 is the same as that described in the first embodiment. Axis 2
The supply / discharge valve 51 is opened by introducing air pressure to the base end side of 3. At this time, the cylinder case 5
When 2 moves up as shown by the chain double-dashed line in FIG. 5, the push rod 53 fixed to the cylinder case 52 pushes the push rod 62 on the air introducing valve 54 side upward through the universal joint. . And the push rod 6
2 presses the valve plate 57A of the auxiliary valve body 57 upward by the contact plate 62A as shown by the chain double-dashed line in FIG.
The tubular valve element is separated from the valve seat portion 55C against 0, and the other-side tubular portion 55B is communicated with the inside of the tank body 1 through each ventilation groove 55D1.

【００６０】一方、空気導入弁５４は、タンク本体１の
油室３が高温となる等の理由で内部の圧力が上昇したと
きには、プッシュロッド６２の当接板６２Ａに押圧され
なくても、タンク本体１内の圧力により筒状弁体５６が
弁ばね６０に抗して弁座部５５Ｃから離座して開弁し、
タンク本体１内から各通気溝５５Ｄ1 を介して他側筒部
５５Ｂ側に余剰のエア等を逃がす。また、逆にタンク本
体１の油室３内が低温となる等の理由で圧力が下がる
と、補助弁体５７が弁ばね５８に抗して開弁し、筒状弁
体５６の通気路５６Ａを介して外気を油室３内に導入す
ることによりタンク本体１内が負圧状態になるのを防止
する。On the other hand, the air introduction valve 54 does not need to be pressed by the contact plate 62A of the push rod 62 when the internal pressure rises due to the temperature of the oil chamber 3 of the tank body 1 becoming high, etc. Due to the pressure in the main body 1, the tubular valve body 56 separates from the valve seat portion 55C against the valve spring 60 and opens the valve,
Excess air or the like is released from the inside of the tank body 1 to the other-side tubular portion 55B side through the ventilation grooves 55D1. On the contrary, when the pressure in the oil chamber 3 of the tank body 1 becomes low due to a low temperature, the auxiliary valve body 57 opens against the valve spring 58, and the ventilation passage 56A of the tubular valve body 56 is opened. By introducing the outside air into the oil chamber 3 via the, the inside of the tank body 1 is prevented from becoming a negative pressure state.

【００６１】かくして、このように構成される本実施例
においても、前記第１の実施例とほぼ同様の作用効果を
奏するものであるが、特に本実施例によれば、給排弁５
１のシリンダケース５２に設けたプッシュロッド５３と
空気導入弁５４側のプッシュロッド６２とを自在継手を
介して連結し、給排弁５１の開弁時に空気導入弁５４を
動的に開弁させるようにしたから、前記第１の実施例で
述べた配管３１Ａを不要にでき、タンク本体１の外部に
配管３１Ａ等の付属物をなくすることができるという効
果がある。Thus, the present embodiment constructed as described above also has substantially the same operational effects as the first embodiment, but particularly according to the present embodiment, the supply / discharge valve 5 is provided.
The push rod 53 provided in the first cylinder case 52 and the push rod 62 on the air introduction valve 54 side are connected via a universal joint, and the air introduction valve 54 is dynamically opened when the supply / discharge valve 51 is opened. Therefore, there is an effect that the pipe 31A described in the first embodiment can be eliminated, and an accessory such as the pipe 31A can be eliminated from the outside of the tank body 1.

【００６２】[0062]

【考案の効果】以上詳述した通り、本考案によれば、給
排弁を、基端側が給排ポートから外部に突出して該給排
ポートに固定され、先端側がタンク本体内に向けて伸長
した中空パイプからなる弁軸と、内周側が該弁軸に摺動
可能に挿嵌され、外周側が前記給排ポートに設けた弁座
に離着座する弁体と、前記弁軸の先端側を覆うように有
蓋筒状に形成され、開口端側が該弁体に固定されたシリ
ンダケースと、該シリンダケース内にエア室とばね室を
画成すべく、外周側が該シリンダケース内に摺動可能に
挿嵌され、内周側が前記弁軸の先端に固定されたピスト
ンと、該ピストンと弁体との間に配設され、該弁体を常
時閉弁方向に付勢すべく前記ばね室内に収容された弁ば
ねとから構成し、前記弁軸の基端側には、前記給排ポー
トの外部から弁軸内を介して前記エア室内にエアを供給
し、前記弁体をシリンダケースと共に前記弁ばねに抗し
て開弁方向に駆動するエア供給手段を接続したから、液
体の給排作業を行う際に、作業者がタンク本体に登るこ
となく中空の弁軸の基端側からシリンダケース内にエア
を給排することにより、弁体を弁座から離座させて開弁
させることができ、液体の給排作業を安全かつ迅速に行
うことができる。As described above in detail, according to the present invention, the supply / discharge valve has the base end side protruding outward from the supply / discharge port and fixed to the supply / discharge port, and the distal end extending toward the inside of the tank body. A valve shaft formed of a hollow pipe, an inner peripheral side slidably inserted in the valve shaft, and an outer peripheral side seated on and off a valve seat provided in the supply / discharge port, and a tip end side of the valve shaft. A cylinder case which is formed in a cylindrical shape with a cover so as to cover and has an opening end side fixed to the valve body, and an outer peripheral side slidable in the cylinder case so as to define an air chamber and a spring chamber in the cylinder case. A piston, which is inserted and fitted and whose inner peripheral side is fixed to the tip of the valve shaft, is arranged between the piston and the valve body, and is housed in the spring chamber so as to always urge the valve body in the valve closing direction. And a valve spring from the outside of the supply / discharge port on the base end side of the valve shaft. Air is supplied to the air chamber via the air supply means, and the valve body is connected to the cylinder case together with the air supply means for driving in the valve opening direction against the valve spring. By supplying and exhausting air into and from the cylinder case from the base end side of the hollow valve shaft without the operator climbing up to the tank body, the valve body can be separated from the valve seat and opened to open the liquid supply. The discharge work can be performed safely and quickly.

【００６３】また、本考案では、弁体を弁軸に摺動可能
に挿嵌し、該弁軸の先端に固定したピストンにシリンダ
ケースを摺動可能に挿嵌し、シリンダケースの開口端側
を弁体に固定しているので、弁体が弁座に対して傾いた
りするのを確実に防止でき、弁体の閉弁時にタンク本体
内の液体が外部に漏洩したりするのを効果的に防止でき
る。Further, in the present invention, the valve body is slidably inserted into the valve shaft, and the cylinder case is slidably inserted into the piston fixed to the tip of the valve shaft. Since it is fixed to the valve body, it is possible to reliably prevent the valve body from tilting with respect to the valve seat, and it is effective to prevent the liquid in the tank body from leaking to the outside when the valve body is closed. Can be prevented.

【００６４】さらに、弁ばねを弁体とピストンとの間に
配設しシリンダケース内に収容する構成としているか
ら、給排弁全体を小型化することができ、タンク本体に
対する組み付けの自由度を大幅に向上できる。そして、
前記シリンダケースの周囲に設ける有蓋筒状のフィルタ
を金網等で簡素な構造に形成でき、該フィルタの前，後
を流れる液体の流路面積を大きく広げることができると
共に、給排弁を開弁したときの液体の給排量を増大で
き、液体の給排作業を短時間で迅速に行うことが可能と
なる。また、請求項２に記載した考案のように、タンク
本体の上部側に空気導入弁を設けることにより、例えば
タンク本体の下部側で給排弁を開弁させ、タンク本体内
の液体を外部に排出するときに、前記空気導入弁を給排
弁と共に開弁させることができ、該空気導入弁を介して
タンク本体内に空気（外気）を導入することにより、該
タンク本体内が負圧状態となるのを確実に防止できる。
この結果、タンク本体内を大気圧状態に保持することが
でき、前記給排弁を介した液体の給排作業をスムーズに
行うことができる。 Further, a valve spring is provided between the valve body and the piston.
Whether the valve is arranged and housed in the cylinder case, the entire supply / discharge valve can be downsized, and the degree of freedom in assembling to the tank body can be greatly improved. And
A cylindrical filter with a lid provided around the cylinder case
Can be formed into a simple structure with wire mesh, etc.
The flow area of the liquid flowing through
Both increase the amount of liquid supply and discharge when the supply and discharge valve is opened.
This makes it possible to quickly perform liquid supply / drainage work in a short time.
Become. In addition, as in the invention described in claim 2, the tank
By installing an air introduction valve on the upper side of the main body, for example
Open the supply / discharge valve on the bottom side of the tank body
When the above liquid is discharged to the outside,
Can be opened together with the valve, and through the air introduction valve
By introducing air (outside air) into the tank body,
It is possible to reliably prevent the inside of the tank body from being in a negative pressure state.
As a result, it is possible to keep the inside of the tank at atmospheric pressure.
It is possible to smoothly perform the liquid supply / discharge work via the supply / discharge valve.
It can be carried out.

[Brief description of drawings]

【図１】本考案の第１の実施例によるタンクローリ車用
液体給排装置をタンクローリ車と共に示す全体図であ
る。FIG. 1 is an overall view showing a liquid supply / drainage device for a tank truck according to a first embodiment of the present invention together with a tank truck.

【図２】図１中の給排弁を拡大して示す縦断面図であ
る。FIG. 2 is an enlarged vertical sectional view showing a supply / discharge valve in FIG.

【図３】図１中の空気導入弁を拡大して示す縦断面図で
ある。FIG. 3 is an enlarged vertical sectional view showing an air introduction valve in FIG.

【図４】本考案の第２の実施例によるタンクローリ車用
液体給排装置をタンクローリ車と共に示す全体図であ
る。FIG. 4 is an overall view showing a liquid supply / drainage device for a tank truck according to a second embodiment of the present invention together with a tank truck.

【図５】図４中の給排弁を拡大して示す縦断面図であ
る。5 is an enlarged vertical sectional view showing the supply / discharge valve in FIG.

【図６】図４中の空気導入弁を拡大して示す縦断面図で
ある。FIG. 6 is an enlarged vertical sectional view showing an air introduction valve in FIG.

【図７】従来技術によるタンクローリ車用液体給排装置
をタンクローリ車と共に示す全体図である。FIG. 7 is an overall view showing a liquid supply / drainage device for a tank truck according to the related art together with a tank truck.

【図８】図７中の給排弁、ハンドル等を拡大して示す縦
断面図である。8 is an enlarged vertical cross-sectional view showing a supply / discharge valve, a handle and the like in FIG.

[Explanation of symbols]

１タンク本体２１，５１給排弁２２給排ポ−ト２３弁軸２４弁体２５，５２シリンダケース２７コイルばね（弁ばね）２９エアコンプレッサ（エア供給手段） 1 Tank Main Body 21,51 Supply / Discharge Valve 22 Supply / Discharge Port 23 Valve Shaft 24 Valve Body 25,52 Cylinder Case 27 Coil Spring (Valve Spring) 29 Air Compressor (Air Supply Means)

Claims

[Scope of utility model registration request]

1. A tank main body, which is provided in a tank truck, stores a liquid, and is provided below the tank main body.
Open the supply / drain port to supply / drain the liquid in the tank body.
In closes supply and discharge valves and the tank truck liquid supply and discharge device for a vehicle comprising a, the sheet discharge valve includes a hollow valve base end protruding outward from the sheet discharge port, the tip end side is extended toward the tank body A shaft, a valve body whose inner peripheral side is slidably inserted in the valve shaft, and whose outer peripheral side is seated on and off a valve seat provided in the supply / discharge port, and a cylindrical shape with a cover so as to cover the tip side of the valve shaft. A cylinder case having an opening end side integrated with the valve body, and an outer peripheral side slidably inserted into the cylinder case so as to define an air chamber and a spring chamber in the cylinder case. A piston whose circumferential side is fixed to the tip end side of the valve shaft, and a valve spring which is arranged between the piston and the valve body and is housed in the spring chamber so as to always urge the valve body in the valve closing direction. The cylinder case is surrounded by the cylinder.
A filter formed in a cylindrical shape with a cover to cover the da case
The valve body is provided on the base end side of the valve shaft.
Drive the valve in the opening direction against the valve spring together with the case.
Ku, the supply and discharge port outside the tank lorry vehicle liquid supplying and discharging, wherein the configuration and then that there was <br/> connecting the air supply means that teapot subjecting air to said air chamber through the valve stem of apparatus.

2. From the outside, the upper side of the tank body
Open and close together with the supply and discharge valve by supplying and discharging air
Introduces air to maintain the inside of the tank body at atmospheric pressure
The tank tank according to claim 1, wherein a valve is provided.
Liquid supply and discharge device for vehicles.