JPH09305U - Fuel tank - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately determine the height position of the breather tube opening in the fuel tank. [Structure] 1 is a resin tank integrally molded, and 2
Is a bracket, 3 is a stopper, 4 is a tube, 6 is a breather tube, and 11 is a flange portion. A hole 10 for inserting a bracket is provided in the upper part (ceiling part) of the resin tank 1. The upper end of the bracket 2 forms a flange portion having a diameter larger than the diameter of the hole 10, the main body of the bracket 2 has an outer diameter that allows insertion into the hole 10, and the bracket 2 fits in the hole 10 of the resin tank 1. The topper 3 is inserted and firmly fixed and supported by the welding surface 8, and the tip is bent inward.
Therefore, the breather tube 6 can be securely held, the breather tube 6 can be extended into the air chamber 5, and the opening 9 thereof can face the fuel upper limit 7 at a constant height. Therefore, the position of the fuel upper limit 7 becomes constant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel tank, and more particularly to a fuel tank in which an opening of a breather tube arranged in the fuel tank is accurately held at the upper limit of the fuel level.

[0002]

[Prior art]

 An example is known in which a general tube or breather tube is previously fixed to the inner surface of the tank upper, and then the tank upper and the lower are joined to form a closed space of the fuel tank (Japanese Utility Model Publication No. 55-110433). Since the breather tube arranged in such a fuel tank is fixed to the inner surface of the tank upper, the positioning with respect to the fuel tank can be accurately performed.

[0003]

[Problems to be solved by the device]

 However, in the case of, for example, a resin fuel tank in which the tank upper and the lower are integrally formed and the sealed space is formed first, the breather tube can be fixed in advance to the inner surface of the resin fuel tank as described above. If the breather tube cannot be fixed, the opening of the breather tube that controls the upper limit of the fuel liquid level cannot be accurately positioned with respect to the fuel tank, and the upper limit of the fuel liquid level cannot be accurately regulated. The object of the present invention is to accurately determine the position of the opening of the breather tube provided in the fuel tank, for example, even in the case of a resin fuel tank in which the tank upper and the lower are integrally formed and the sealed space is formed first. It is to provide a fuel tank that can regulate the upper limit of the fuel level accurately.

[0004]

[Means for Solving the Problems]

 For the above purpose, in a fuel tank having a substantially closed space, a hole formed in a part of the fuel tank, a breather tube whose one end opens into a substantially closed space of the fuel tank, and a hole inside the fuel tank through the hole. Insert the insertion part, the flange part on the base end side of the insertion part, which is formed with a diameter larger than the diameter of the hole, and the opening of the breather tube on the tip end side of the insertion part. It is achieved by including a tube bracket including a sandwiching portion that sandwiches the inside at a predetermined height position.

[0005]

[Action]

 According to the above configuration, a part of the breather tube disposed in the almost enclosed space of the fuel tank is not enclosed in the enclosed space by the pinching portion of the tube bracket inserted through the hole of the fuel tank without a special jig. Therefore, even when the step of disposing the breather tube in the closed space is performed after the closed space is formed, the opening of the breather tube can be accurately positioned with respect to the fuel tank. Therefore, the distance between the opening of the breather tube and the fuel tank ceiling is accurately determined, and the upper limit of the fuel level is correctly controlled.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Embodiment 1 FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention. This figure shows the bracket according to the present embodiment and shows the case of holding a general tube. In the figure, 1 is a resin tank integrally molded, 2 is a bracket, 3 is a stopper, and 4 is a tube. A hole 10 for inserting the bracket 2 is provided in the upper part (ceiling part) of the resin tank 1. The bracket 2 has a flange portion 11 having a diameter larger than the diameter of the hole 10 on the base end side, that is, the upper end. The flange portion 11 supports the bracket 2 on the resin tank 1 when the insertion portion 12 of the bracket 2 is inserted into the hole 10. It should be noted that the insertion portion 12 of the bracket 2 need only have an outer diameter that allows it to be inserted into the hole 10. However, in this embodiment, only the hole contact portion below the flange portion 11 is slightly smaller than the inner diameter of the hole 10. The outer diameter is used, and the area below it is made smaller.

On the other hand, the tip (lower end) of the insertion portion 12 of the bracket 2 is formed with a stopper 3 which forms a holding portion for holding the tube 4 by bending the end portion inward. In order to attach the tube 4, first, the tube 4 is inserted into a hole (not shown) in the wall surface of the resin tank 1, and the insertion portion 12 of the bracket 2 is inserted into the hole 10. Then, in FIG. 1, a part of the tube 4 is opposed to a part of the tube 4 so that a part of the tube 4 is located under the stopper 3 in a direction substantially perpendicular to the outer surface a of the resin tank 1. Next, if the tube 4 is pushed into the stopper 3, the stopper 3 holds and supports the tube 4 as it is. Since the tip of the bent portion of the stopper 3 is formed to be equal to or substantially equal to the curvature of the outer surface of the tube 4, the tube 4 is securely held without a gap and has good stability.

In the bracket 2 having such a structure, the flange portion 11 is welded to the upper outer surface a 1 of the resin tank 1. That is, the flange portion 11 of the bracket 2 and the peripheral portion of the hole 10 of the resin tank 1 are welded by appropriate means, and therefore the bracket 2 is firmly fixed to the resin tank 1 by this welding surface 8. Is.

Embodiment 2 FIG. 2 is an explanatory diagram showing the configuration of another embodiment of the present invention. This figure shows the case where the bracket is applied to hold the breather tube. In this case, since the bracket 2 has the same structure as that of the first embodiment, is firmly fixed to the upper portion of the resin tank 1 by the welding surface 8, and has the stopper 3 at the tip, the breather tube 6 is provided. Is securely held by the bracket 2 and extends into the air chamber 5 so that its opening 9 can face the fuel upper limit 7 at a constant height. Therefore, the position of the fuel upper limit 7 becomes constant. In each of the above embodiments, one bracket 2 is attached to the upper portion of the resin tank 1, but a plurality of brackets may be attached.

[0010]

[Effect of the invention]

 As described above, according to the present invention, the breather tube disposed in the almost enclosed space of the fuel tank can be fixed in the enclosed space by the sandwiching portion of the tube bracket inserted through the hole of the fuel tank. Since the opening of the breather tube can be accurately positioned with respect to the fuel tank, the upper limit of the fuel level can be accurately regulated.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the configuration of another embodiment of the present invention.

[Explanation of symbols]

 1 Resin Tank 2 Bracket 3 Stopper 4 Tube 5 Air Chamber 6 Breather Tube 7 Fuel Upper Limit 8 Welding Surface 9 Breather Tube Opening 10 Hole 11 Flange 12 Insertion

Claims (1)

[Utility model registration claims] 1. A fuel tank having a substantially closed space, a hole formed in a part of the fuel tank, a breather tube having one end opening in the substantially closed space of the fuel tank, and the fuel through the hole. An insertion portion to be inserted inside the tank, a flange portion provided on the base end side of the insertion portion and having a diameter larger than the diameter of the hole, and an opening of the breather tube provided on the tip end side of the insertion portion. And a tube bracket configured to hold the fuel tank at a predetermined height in a closed space of the fuel tank.