JPS6119073Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a vent pipe support structure for a fuel tank.

BACKGROUND TECHNOLOGY In general, a fuel tank for a vehicle such as an automobile is connected with a vent pipe for controlling the tank to be full to remove air from the tank when filling fuel, or a vent pipe for recovering fuel vapor. ing. Conventionally, as the ventilation pipe support structure of the fuel tank mentioned above, there is a structure in which a ventilation pipe is vertically inserted into the upper wall of the tank, as in Japanese Utility Model Application No. 51-45524, and a structure in which a ventilation pipe is vertically inserted into the upper wall of the tank.
As shown in Japanese Patent No. 3290, a tank is known in which a ventilation pipe is inserted into the upper part of the tank and opened in a substantially horizontal position.

Problems that the invention aims to solve: With the above-mentioned conventional vent pipe support structure in a fuel tank, the energy injected during fuel injection causes the liquid level in the tank to wave, causing the fuel to rise above the level even though the tank is not yet full. There is a problem in that the opening of the vent pipe for regulating the tank is closed and opened, making it impossible to fill the tank with fuel. Moreover, among the above-mentioned conventional techniques, in the one disclosed in Japanese Utility Model Publication No. 51-3290, the vent pipe was only supported in a cantilever manner with the open end as the free end, so not only was the opening position undefined; There was an inconvenience in that the vehicle swung up and down due to vibrations during running, and fuel entered the vent pipe for recovering fuel vapor and was forced out through the vent pipe.

Means for Solving the Problems The present invention has been proposed in view of the above-mentioned points, and it is designed to attach the tip of the ventilation pipe, which is inserted into the upper part of the tank in an approximately horizontal position, to a bracket attached to the upper wall of the tank. At the same time, an anti-waving piece that surrounds the opening of the vent pipe supported by the bracket is bent downwardly from the bracket.

Function: In this invention, the opening end of the ventilation pipe is supported by a bracket attached to the upper wall inside the tank, so the opening position can be set accurately, and the ventilation pipe can be moved up and down inside the tank against vibrations during driving. The opening of the vent pipe is prevented from swinging from side to side, and even if the liquid level fluctuates or undulates during fuel injection, etc., the anti-undulation piece bent downward from the bracket can protect the opening of the vent pipe. Since the periphery is surrounded, it is possible to prevent the opening of the ventilation pipe from being blocked before the tank is filled.

Embodiment In FIGS. 1 to 3, 1 is a fuel tank that is attached to a vehicle such as an automobile, and 2 is a bracket that is attached and fixed to the upper wall of the fuel tank 1. This bracket is made by bending and forming a plate material of a predetermined shape. and top 3
At least three anti-waving pieces 4a, 4b, 4
c is made to hang downward, and an opening portion 5 is formed on one side thereof. Each anti-waving piece 4a, 4b, 4c of this bracket 2 has a hole 6 with a predetermined diameter.
a and 6b are formed. Reference numeral 7 indicates a vent pipe for controlling the tank to be full to remove air from the fuel tank 1 when fuel is supplied to the fuel tank 1 via a fuel injection pipe (not shown); 8 indicates a vent pipe for recovering fuel vapor; Each of the vent pipes 7 and 8 is connected to the fuel tank 1.
is inserted into the tank 1 in a substantially horizontal position, and its opening tips 7' and 8' are inserted into the holes 6a and 6b provided in the anti-waving pieces 4a and 4b of the bracket 2, respectively. It is inserted and supported and fixed, and its opening is surrounded by anti-waving pieces 4a, 4b, and 4c. Therefore, the opening tips 7' and 8' of the ventilation pipes 7 and 8 can be reliably positioned and fixed.
The opening height can be set accurately.

In this way, if the liquid level 9 of the fuel in the fuel tank 1 now ripples as shown in Fig. 3 due to vibrations, etc.,
The liquid level 9' in the bracket 2 is
Due to the actions of a, 4b, and 4c, it is isolated from the liquid surface 9, keeping it calm and preventing it from undulating.

Effects of the invention As explained above, the present invention supports the tip of the ventilation pipe inserted into the upper part of the tank in a substantially horizontal position with a bracket attached to the upper wall of the tank, and Since the anti-waving piece surrounding the opening of the ventilation pipe is bent and suspended downward from the bracket, the height of the opening of the ventilation pipe can be set accurately. This prevents undulations around the opening of the vent pipe, and for example, in the case of a vent pipe for regulating full tank, the air in the tank is discharged until the vent pipe opening is completely submerged, and the tank is kept at the full tank position. Dispersion is prevented. Further, if the vent pipe is for fuel vapor recovery, it is possible to prevent fuel from entering the vent pipe, and the problem can be solved. Further, since it is only necessary to attach the bracket with the anti-waving piece bent downward to the upper wall of the tank, the manufacturing process is simple and easy, and the manufacturing cost is low.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the device of the present invention, FIG. 2 is a perspective view of the main part thereof, and FIG. 3 is a sectional view of the main part showing the state during waving. 1...Fuel tank, 2...Bracket,
7, 8... Ventilation pipe.

Claims (1)

[Scope of utility model registration request] The tip of the ventilation pipe inserted into the upper part of the tank in a substantially horizontal position is supported by a bracket attached to the upper wall of the tank, and an anti-waving piece is installed to surround the opening of the ventilation pipe supported by the bracket. A vent pipe support structure for a fuel tank, characterized in that it is bent and hangs downward from the bracket.