JPS6216027U

JPS6216027U -

Info

Publication number: JPS6216027U
Application number: JP10796985U
Authority: JP
Priority date: 1985-07-15
Filing date: 1985-07-15
Publication date: 1987-01-30

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る燃料タンク
用キヤツプの断面図、第２図は第１図のＡ―Ａ矢
視図、第３図は負圧時に於ける燃料タンク用キヤ
ツプの作用説明図、第４図は加圧時に於ける燃料
タンク用キヤツプの作用説明図、第５図は第１の
従来に於ける燃料タンク用キヤツプの断面図であ
る。１……キヤツプ本体、２……支持板、３……ブ
ロツク体、４……中空円筒部、６……弁体、７…
…第１室、７ａ……第１室の側壁面、８……第２
室、８ａ……第２室の側壁面、９Ａ……第２連通
路、９Ｂ……大気通路、１０Ａ……第２連通路、
１０Ｂ……タンク通路、１１……第２空間部、１
２……第１空間部、１３……第１スプリング、１
４……第２スプリング。 Fig. 1 is a sectional view of a fuel tank cap according to the first embodiment of the present invention, Fig. 2 is a view taken along arrow A-A in Fig. 1, and Fig. 3 is a cross-sectional view of a fuel tank cap in a negative pressure state. FIG. 4 is an explanatory diagram of the operation of the fuel tank cap during pressurization, and FIG. 5 is a sectional view of the first conventional fuel tank cap. DESCRIPTION OF SYMBOLS 1... Cap body, 2... Support plate, 3... Block body, 4... Hollow cylindrical part, 6... Valve body, 7...
...First chamber, 7a...Side wall surface of first chamber, 8...Second
Chamber, 8a...Side wall surface of the second chamber, 9A...Second communication passage, 9B...Atmospheric passage, 10A...Second communication passage,
10B...Tank passage, 11...Second space, 1
2...First space part, 13...First spring, 1
4...Second spring.

Claims

[Scope of utility model registration request]

The interior of the cap body is divided into a first chamber that communicates with the atmosphere side and a second chamber that communicates with the tank side via a slidable valve body along the side wall surface, and the first chamber is connected to the atmosphere. A first communication passage that communicates with the side wall of the first chamber and an atmosphere passage that communicates the atmosphere with the first chamber are formed, and the second chamber communicates with the tank side and faces the side wall of the second chamber. A second communication passage and a tank passage communicating with the tank side and the second chamber are formed, and a first spring is installed between the upper wall surface of the first chamber and the valve body, and a second
The valve body is held in a balanced state by installing a second spring between the lower wall surface of the chamber and the valve body, and the valve body has a notch-shaped second space facing the first chamber on its outer sliding surface. and a notch-shaped first space facing the second chamber are separately provided, and the valve body shuts off the atmosphere in the first chamber and the pressure air in the tank in the second chamber when the pressure is balanced, and when the pressure inside the tank is negative, A cap for a fuel tank, characterized in that the space portion and the second communication passage communicate with each other, and the first space portion and the first communication passage communicate with each other when the internal and external pressures of the tank are high.