JPS6349375Y2

JPS6349375Y2 -

Info

Publication number: JPS6349375Y2
Application number: JP1982013037U
Authority: JP
Priority date: 1982-02-03
Filing date: 1982-02-03
Publication date: 1988-12-19
Also published as: JPS58116414U

Description

【考案の詳細な説明】（産業上の利用分野）この考案は自動車の横転時や一定以上の傾斜時
に燃料タンク内の燃料が外部に流出するのを防止
するようにしたバルブの改良に関する。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an improvement in a valve that prevents the fuel in the fuel tank from flowing out when the vehicle rolls over or tilts over a certain level.

（従来の技術）自動車における燃料流出防止用のバルブいわゆ
るロールオーババルブは、燃料タンクとこのタン
ク内および気化器内に生じる燃料蒸気を吸着保持
して随時吸気管に供給するためのカーボンキヤニ
スタとを結ぶ流路すなわちエバポラインの途中に
配設されるか、または燃料タンクの蒸気室内に取
付けられるかして、車体が横転したり一定以上に
傾いたりした際に流路を閉鎖し、燃料が外部に流
出するのを防止する役割を果たすものであるが、
その一つとして、実公昭37−5452号公報にみられ
るように、燃料タンク内に上壁から接続筒を垂設
し、接続筒の取付け面板を貫通させて空気供給管
に連通する空気弁室を設ける一方、その下端部に
底面を円錐状部とした球受け板を螺合し、この球
受け筒の内部にボールを収容し、ボールの上には
下端に円錐状板を備えた柱状弁体を載置し、その
先端を接続筒の下筒に内装したガイド部に嵌挿す
ると共に柱状弁体にスプリングを巻回したものが
知られており、また、最近では、第１図イ，ロに
示すようにスプリングを用いずに構造を簡単化し
たバルブが用いられている。すなわち、第１図イ
はバルブケースを入口パイプa₁を備えた筒本体ａ
と出口パイプb₁を備えた蓋体ｂで構成しエバポラ
インの途中に配設するようにしてあり、また、同
図ロは上記の筒本体ａに入口パイプに代えて燃料
蒸気の流入通孔a₂を設けると共に側壁上部に空気
抜き孔a₃を設けて、蓋体ｂを直接燃料タンクの蒸
気室内に取付けるようにしてあるが、いずれにし
ても、筒本体ａの内部に十字状の脚片c₁に重量ボ
ールｄを回転自在に抱持した棒状弁体ｃを収容
し、そのボールｄを中心に向つて下方に傾斜した
底壁a₄の中心部におくと共に弁体ｃの先端を蓋体
ｂ中心部の弁座b₂中に挿入し、車体が横転したり
傾斜したりした際にはボールｄが底壁a₄上を転動
し、棒状弁体ｃの先端により出口パイプb₁の通路
を遮断するようになつている。(Prior Art) A so-called rollover valve, which is a valve for preventing fuel leakage in automobiles, consists of a fuel tank, a carbon canister that adsorbs and holds fuel vapor generated in the tank and a carburetor, and supplies it to the intake pipe at any time. It is either placed in the middle of the evaporation line, or installed in the vapor chamber of the fuel tank, and closes the flow path when the vehicle rolls over or leans beyond a certain level, allowing fuel to flow outside. The role is to prevent the leakage of
As one example, as seen in Japanese Utility Model Publication No. 37-5452, a connecting tube is installed vertically from the upper wall inside the fuel tank, and an air valve chamber is communicated with the air supply pipe by penetrating the mounting face plate of the connecting tube. At the same time, a ball receiving plate with a conical bottom is screwed to its lower end, a ball is accommodated inside this ball receiving cylinder, and a columnar valve with a conical plate at its lower end is mounted above the ball. A valve body is placed on the valve body, the tip of which is inserted into a guide part built into the lower cylinder of the connecting cylinder, and a spring is wound around the columnar valve body. As shown in FIG. 2, a valve with a simplified structure without using a spring is used. That is, Fig. 1A shows the valve case as a cylinder body a equipped with an inlet pipe _a1 .
It consists of a cover body b equipped with an outlet pipe _b1 and a cover body b, and is arranged in the middle of the evaporation line.Furthermore, in the figure b, a fuel vapor inflow hole a is installed in the cylinder body a instead of the inlet pipe. ₂ and an air vent hole a ₃ is provided in the upper part of the side wall so that the lid b can be directly attached to the steam chamber of the fuel tank. A rod-shaped valve body c that rotatably holds a heavy ball d is housed in ₁ , and the ball d is placed in the center of a bottom wall a ₄ that slopes downward toward the center, and the tip of the valve body c is attached to the lid body. The ball d is inserted into the valve seat b ₂ in the center of the valve body b, and when the vehicle rolls over or tilts, the ball d rolls on the bottom wall a ₄ and the tip of the rod-shaped valve body c closes the outlet pipe b ₁ . It is designed to block the passage.

（考案が解決しようとする問題点）ところで、前者のバルブ装置では、弁部材が下
端を円錐状にした柱状弁体とボールとスプリング
の三部分からなつていて、構造が複雑かつ部品管
理が面倒で、そして、空気弁室の弁座を閉じるに
当たつては、スプリングのばね力とガイド部にお
ける摩擦に打ち勝つて相当の距離、柱状弁体を押
し上げねばならず、弁部材の動作が重く円滑性に
欠ける問題点がある。(Problem that the invention aims to solve) By the way, in the former valve device, the valve member consists of three parts: a columnar valve body with a conical lower end, a ball, and a spring, making the structure complicated and parts management difficult. In order to close the valve seat of the air valve chamber, the columnar valve body must be pushed up a considerable distance by overcoming the spring force of the spring and the friction in the guide part, which makes the valve member's movement heavy and smooth. There is a problem with lack of sex.

これに対し後者は（第１図イ，ロ）は構造が簡
単で動作が確実な利点を有しているが、重量ボー
ルｄを脚片c₁で落ちないように抱持する必要か
ら、その先端をボール中心より下側にしなければ
ならず、そこで、車体すなわちバルブケースが傾
いたときに脚片c₁の先端が底面に当たり易いの
で、筒本体ａの底壁a₄の傾斜角度を余り大きくす
ることができず大体20゜前後に制限されている。
そのため、車体の比較的小さな傾き（例えばカー
ブするときなど）によつても流路が閉じられてし
まいエバポラインが機能しなくなる恐れがあり、
また、底壁a₄の上記のような傾斜によつて弁体ｃ
に所要のリフト量（約２mm程度）を得るには弁体
ｃが長くなりまた、底壁a₄を広くしなければなら
ず、したがつてバルブケースが大きくなり、車体
の小型軽量化のために燃料タンクを薄くしようと
する要求に合わないという難点がある。 On the other hand, the latter (Fig. 1 A and B) has the advantage of a simple structure and reliable operation, but it is difficult to do so because it is necessary to hold the heavy ball d with the leg c ₁ to prevent it from falling. The tip of the leg c1 must be below the center of the ball, and the tip of the leg _c1 tends to hit the bottom when the car body, that is, the valve case is tilted, so the angle of inclination of the bottom wall _a4 of the cylinder body a should not be too large. The angle is generally limited to around 20°.
Therefore, even a relatively small inclination of the vehicle body (for example, when making a curve) may close the flow path and cause the evaporation line to malfunction.
Also, due to the above-mentioned inclination of the bottom wall _a4 , the valve body c
In order to obtain the required lift amount (approximately 2 mm), the valve body c has to be long, and the bottom wall _a4 has to be widened, so the valve case has to be large, and it is necessary to make the car body smaller and lighter. The disadvantage is that it does not meet the demand for thinner fuel tanks.

そこで、この考案は弁体の動作が円滑かつ迅速
で、余分な部品を必要とせず、管理がやり易く、
しかも、ケース底壁の傾きを大きくできてケース
自体を小型化できる燃料流出防止用のバルブを提
供するものである。 Therefore, this idea allows the valve body to operate smoothly and quickly, does not require extra parts, and is easy to manage.
Moreover, the present invention provides a valve for preventing fuel outflow, which allows the bottom wall of the case to be made large inclination and the case itself to be miniaturized.

（問題点を解決するための手段）上記目的のためにこの考案は、燃料流出防止用
のバルブとして、底壁が中心に向つて下方に傾斜
した筒本体と、中心部に出口パイプと円錐状の弁
座を備えた蓋体とからなるバルブケースの内部
に、棒部と下側胴部とからなり下側胴部に重量体
を固定的に一体に取付けて下方表面を球状に形成
した棒状弁体を収容し、その先端部を弁座の内部
に挿入したことを特徴としている。(Means for Solving the Problems) For the above purpose, this invention is a valve for preventing fuel outflow, with a cylindrical body whose bottom wall slopes downward toward the center, an outlet pipe in the center, and a conical shape. Inside the valve case, which consists of a lid body with a valve seat, is made up of a rod part and a lower body part. It is characterized by housing the valve body and inserting its tip into the inside of the valve seat.

（実施例）第２図、第３図はこの考案の一実施例を示すも
のであり、１はバルブケースの筒本体であつて、
その底壁１ａは中心に向つて下方に傾斜している
が、その傾斜角度は後述のように従来のものより
大きく（大体15゜程度）なされており、その底壁
１ａには複数の燃料蒸気流入用の通孔１ｂが設け
られると共に側壁上部には空気抜き孔１ｃが設け
られ、上端開口部には中心部に出口パイプ２ａと
円錐状の弁座２ｂを備えた蓋体２が被着されてお
り、そして上記バルブケースの内部には、下方が
球状をなし、その中に重量体４が包み込むように
一体成形した棒状弁体３が底壁中心部に着座させ
て収容され、その先端部は蓋体２の弁座２ｂ中に
挿入され、出口パイプ２ａの開口端との間には従
来と同じリフト量が存在するようになされてい
る。(Embodiment) Figures 2 and 3 show an embodiment of this invention, in which 1 is the cylinder body of the valve case;
The bottom wall 1a is inclined downward toward the center, but the angle of inclination is larger (approximately 15 degrees) than the conventional one as described later, and the bottom wall 1a has a plurality of fuel vapors. A through hole 1b for inflow is provided, and an air vent hole 1c is provided in the upper part of the side wall, and a lid body 2 having an outlet pipe 2a and a conical valve seat 2b in the center is attached to the upper end opening. Inside the valve case, there is housed a rod-shaped valve element 3, which has a spherical lower part and is integrally molded with a weight body 4 wrapped therein, and is seated at the center of the bottom wall. It is inserted into the valve seat 2b of the lid body 2, and the same amount of lift as before exists between it and the open end of the outlet pipe 2a.

このように、弁体３には球状の下側胴部３ａか
ら横に出ばるものがないので、同じリフト量を取
りつつ底壁１ａの傾斜角度を大きくすることがで
きる。そして、このバルブは蓋体２を燃料タンク
の蒸気室の上壁内面に図示点線のように装着し、
出口パイプ２ａをエバポラインに接続して使用さ
れる。 In this way, since the valve body 3 has nothing protruding laterally from the spherical lower body 3a, the inclination angle of the bottom wall 1a can be increased while maintaining the same amount of lift. Then, this valve has a lid 2 attached to the inner surface of the upper wall of the vapor chamber of the fuel tank as shown by the dotted line in the figure.
It is used by connecting the outlet pipe 2a to the evaporation line.

そこで、使用中に車体が筒本体１の底壁１ａの
傾斜角度以上に傾いたりまたは横転したりした際
には、第３図のように弁体３の球状の下側胴部３
ｂが筒本体１の底面上を側方に摺動して棒部３ａ
の先端部により出口パイプ２ａの開口端を直ちに
閉鎖する。また、車体が元の水平状態に復帰すれ
ば、弁体３も下側胴部３ｂが底壁１ａの中心部に
向つて摺動し、第２図の始めの状態に復帰する。 Therefore, when the vehicle body is tilted at an angle greater than the inclination angle of the bottom wall 1a of the cylinder body 1 or rolled over during use, the spherical lower body 3 of the valve body 3 should
b slides laterally on the bottom surface of the cylinder body 1 to form the rod portion 3a.
immediately closes the open end of the outlet pipe 2a. Further, when the vehicle body returns to its original horizontal state, the lower body portion 3b of the valve body 3 also slides toward the center of the bottom wall 1a, returning to the initial state shown in FIG.

第４図は棒状弁体３の下側胴部３ｂをつば状に
なし、その下側に球状表面を備えた重量体４を接
着などにより一体に取付けて、筒本体１中に収容
した変更例を示すものであるが、車体横転時にお
ける棒状弁体３の機能は上述のものと変りない。
また、筒本体１に通孔１ｂ，１ｃを設けることな
く入口パイプを設けて、エバポライン中に配設し
うるようにしてもよいことは勿論である。 FIG. 4 shows a modified example in which the lower body 3b of the rod-shaped valve body 3 is shaped like a brim, and a weight body 4 with a spherical surface is attached to the lower side of the body by adhesive or the like and housed in the cylinder body 1. However, the function of the rod-shaped valve body 3 when the vehicle rolls over is the same as that described above.
Furthermore, it goes without saying that an inlet pipe may be provided in the cylinder body 1 without providing the through holes 1b and 1c so that it can be disposed in the evaporation line.

（考案の効果）以上のようにこの考案は、燃料流出防止用のバ
ルブとして、バルブケースの内部に、棒部と下側
胴部からなつていて、下側胴部に重量体を固定的
に一体に取付けて下方表面を球状に形成した棒状
弁体を収容し、その先端部を円錐状弁座の内部に
挿入したので、棒状弁体を抑圧したりその動きの
向きを規制するものがなく、車体が大きく傾いた
り転倒したりした際には、弁体が軽快に動作して
出口パイプの開口端を遅滞なく直ちに閉じること
ができ、棒状弁体は全一体のもので、余分な部品
を必要とせず、作り易く管理のやり易いものであ
りまた、下側胴部から横に突き出るものがないの
で、従来と同じリフト量を取りつつ筒本体の傾き
を大きくすることができ、それだけ筒本体の高さ
を低くして小型化でき、しかも、車体が大きく傾
いて始めて弁体が動作するので、不必要にエバポ
ラインの機能を止めるような不具合を生じない。(Effects of the invention) As described above, this invention, as a valve for preventing fuel outflow, consists of a rod part and a lower body part inside the valve case, and a heavy body is fixedly attached to the lower body part. Since the rod-shaped valve element is attached integrally and has a spherical lower surface, and its tip is inserted into the conical valve seat, there is nothing to suppress the rod-shaped valve element or restrict the direction of its movement. When the vehicle body tilts significantly or falls over, the valve body moves easily and closes the opening end of the outlet pipe immediately without delay.The rod-shaped valve body is completely integrated, and unnecessary parts can be removed. It is easy to make and maintain, and since there is nothing that protrudes sideways from the lower body, the inclination of the cylinder body can be increased while maintaining the same amount of lift as before, and the cylinder body can be adjusted accordingly. The height of the valve can be lowered to make it more compact, and since the valve body operates only when the vehicle body is tilted significantly, problems such as unnecessary stoppage of the evaporative line function will not occur.

[Brief explanation of the drawing]

第１図イはエバポラインの途中に配接するよう
にした従来のバルブの断面図。同図ロは燃料蒸気
室に装着するようにした従来のバルブの断面図。
同図ハは弁体の平面図。第２図はこの考案の一実
施例の断面図。第３図は傾倒した状態の断面図。
第４図は変形例の断面図。図中、１……筒本体、１ａ……底壁、１ｂ……
通孔、１ｃ……空気抜き孔、２……蓋体、２ａ…
…出口パイプ、２ｂ……弁座、３……棒状弁体、
３ａ……棒部、３ｂ……下側胴部、４……重量
体。 FIG. 1A is a sectional view of a conventional valve arranged in the middle of an evaporation line. Figure B is a sectional view of a conventional valve installed in the fuel vapor chamber.
Figure C is a plan view of the valve body. FIG. 2 is a sectional view of one embodiment of this invention. FIG. 3 is a sectional view in a tilted state.
FIG. 4 is a sectional view of a modified example. In the figure, 1...tube body, 1a...bottom wall, 1b...
Through hole, 1c... Air vent hole, 2... Lid, 2a...
... Outlet pipe, 2b ... Valve seat, 3 ... Rod-shaped valve body,
3a...rod part, 3b...lower body part, 4...heavy body.

Claims

[Scope of utility model registration request]

A cylinder body 1 with a bottom wall 1a inclined downward toward the center, an outlet pipe 2a and a conical valve seat 2 in the center.
A weight body 4 consisting of a rod portion 3a and a lower body portion 3b is fixedly and integrally attached to the lower body portion 3b inside a valve case consisting of a lid body 2 having a cylindrical shape, so that the lower surface thereof is spherical. The formed rod-shaped valve body 3 is accommodated, and the rod portion 3
A valve for preventing fuel outflow, the tip of which is inserted into the inside of the valve seat 2b.