JP2508595Y2 - Fuel tank cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a fuel tank cap for vehicles, ships, and the like.

(Prior Art) A fuel tank cap that closes an inlet of a fuel tank is required to be completely sealed except for the opening of a breather, and is designed to strongly elastically contact a sealing member.

For example, FIG. 4 shows a screw type fuel tank a
The cap main body c is screwed onto the outer surface of the injection port b by the screw d, and the seal member e is fastened between the end surface of the injection port b and the back surface of the cap main body c to obtain a reliable sealing property. .

However, in this case, since the cap body is rotated and attached and detached, the operation is troublesome, and the injection port b where the screw d is provided protrudes high, so that it is often difficult to adopt in the layout.

As shown in FIG. 5, the protrusion of the inlet f is relatively low,
It is a leaf spring type that allows the cap body g to be attached with one touch.

That is, the leaf spring h is attached to the boss portion m on the back surface of the cap body g.
Has a fixed end fixed by a screw n, and a downwardly facing locking cam i that partially bulges downward is formed on the inner surface of the injection port f, and the cap main body g is covered to rotate the predetermined angle. It can be attached by operation. The free end of the leaf spring h is
The cap main body g engaging with the leaf spring h via the boss m is pushed through the notch j to enter under the locking cam i, and then pushed downward on the bulging portion, so that the cap main body g is engaged with the seal member l. It is made to elastically contact the end face of the injection port f with the pinch sandwiched therebetween.

However, in this type, since the sealing member 1 is slid to attach and detach the cap body g, a large force is required to rotate the cap body g, and the sealing performance depends on the elastic force of the leaf spring h, and thus becomes unstable. However, if this is prevented and the elasticity is increased to increase elasticity, a larger force is required to rotate the cap body g, making it difficult to attach and detach.

Further, there is a sealing member of a cylindrical elastic body that is press-fitted into the inlet to tightly plug it (not shown).
In addition, in order to improve the sealing performance, it is necessary to press fit with a considerable amount of force, which is not easy to attach and detach.

(Problems to be solved by the invention) As described above, in the case of the fuel tank cap which has been conventionally used, in particular, one which can be attached and detached with one touch, there is a contradictory effect between the sealing performance and the operability. ,
An object of the present invention is to provide a fuel tank cap that can be easily attached and detached and has high sealing performance.

[Constitution of device]

(Means for Solving the Problems) In accordance with the above-mentioned object, the fuel tank cap of the present invention is a detachable fuel tank in which the injection port is tightly plugged by elastic contact of a seal member provided on the back surface of the cap body. In the cap, in the center of the cap body, the front and back sides are slidably passed up and down, and a pressurizing shaft that increases the elastic contact force of the seal member when ascended is axially engaged, and at the upper end of the pressurizing shaft, A rotating cam that contacts the upper surface of the cap body and moves the pressure shaft up and down is pivotally supported, and an operation lever that is set to pull up the pressure shaft when swinging to a horizontal position is fixed to this rotation cam. On the other hand, the seal member is attached to the back surface of the cap body and contacts the end surface of the inlet, and is formed on the free end of the leaf spring with the fixed end attached to the back surface of the cap body and the inner surface of the inlet. It is crimped by a downward elastic force generated by engaging with a downward locking cam, and the free end of the leaf spring is tightened by pulling up the pressure shaft.

(Operation) Since this is done, when the cap body is attached or detached, the operating lever is erected upright to loosen the pressure shaft,
By reducing the elastic force of the seal member, it becomes easier to rotate and insert, and it is possible to operate with a small force.

To put the cap body on, push down the operating lever and pull up the pressure shaft. This increases the elasticity of the seal member and enhances the sealing performance.

Although the operation of raising and lowering the operating lever is added, the fuel tank cap is easy to handle and has high reliability as it is as simple as one-touch operation.

(Embodiment) A description will be given below of a drawing which is an embodiment of the present invention.

In FIG. 1, a fuel tank 1 is provided with an injection port 2 having a cylindrical body whose upper end portion is inverted inward and downward, and a lower end edge 3 of the inverted portion is partially downward as shown in FIG. The locking cam 4 has a bulging portion 4a that bulges inward. Further, a notch 4b is arranged in a part of the locking cam 4.

On the other hand, the cap body 5 is a box type with an open lower surface, and a seal member 6 is attached to the peripheral edge of the upper surface of the inner chamber. By covering this with the injection port 2, the seal member 6 is in contact with the upper end surface thereof to close the opening.

At the center of the cap body 5, a slidable pressure shaft 7 that vertically penetrates the front and back is fitted.

At the lower end of the pressure shaft 7, a central portion of a leaf spring 8 that fits inside the cap body 5 is fixed. One end of the leaf spring 8 is locked by the detent 9 to become a fixed end 8a, and the other end is a free end.
It extends laterally as 8b.

A rotating cam 10 that is in contact with the upper surface of the cap body 5 is rotatably supported on the upper end of the pressure shaft 7. Rotating cam 10
Is set in such a shape that the pressure shaft 7 is moved up and down by turning. Also, the operation lever 11 for controlling the rotation thereof
Is fixed. The operating lever 11 is set to a position relative to the rotating cam 10 so that the pressing shaft 7 is lowered when it is upright and the pressing shaft 7 is pulled up when it is horizontal.

With this configuration, when the cap body 5 can be attached to the inlet 2, first, the operation lever 11 is made upright to lower the pressure shaft 7. Then, the leaf spring free end 8b is covered with the notch 4b, and the free end 8b is put under the locking cam 4. Then, by rotating the cap body 5, the free end 8b of the leaf spring rides on the bulging portion 4a and is bent downward, and the elastic force urges the cap body 5 as a whole downward, so that the seal member 6 fills the inlet. It is elastically contacted with the upper end surface of 2.

In the above operation, since the pressurizing shaft 7 is lowered and the leaf spring 8 does not generate so much elastic force, the operation for rotating the cap body 5 is light.

Thus, finally, the operation lever 11 is tilted horizontally to pull up the pressure shaft 7. The leaf spring 8 is lifted to increase the elasticity, and the sealing performance of the seal member 6 is enhanced.

When removing the cap body 5, first, the operation lever 11 is vertically raised to reduce the elasticity of the leaf spring 8, and then the cap body 5 is rotated to pull out the leaf spring free end 8b and the notch 4a together. The turning operation of the cap body 5 is easy as in the case of attachment.

[Effect of device]

As described above, the fuel tank cap according to the present invention is a detachable fuel tank cap in which the injection port is tightly plugged by the elastic contact of the seal member provided on the back surface of the cap body. By controlling the cam with the operation lever, the elastic contact force of the seal member is increased or decreased via the pressure shaft that penetrates the center of the cap body. The performance has the effect of making it highly reliable under high loads.

[Brief description of drawings]

1, 2, and 3 show a fuel tank cap according to an embodiment of the present invention. FIG. 1 is a vertical side view, FIG. 2 is a plan view, and FIG. 3 is an enlarged view of a locking cam. Development view, Fig. 4,
FIG. 5 is a vertical sectional side view of a conventional fuel tank cap. DESCRIPTION OF SYMBOLS 1 ... Fuel tank, 2 ... Filling port, 4 ... Locking cam, 4a ... Notch, 4b ... Swelling part, 5 ... Cap body, 6 ... Seal member,
7 ... Pressure shaft, 8 ... Leaf spring, 8a ... Leaf spring fixed end, 8b
... Free end of leaf spring, 10 ... Rotating cam, 11 ... Operating lever.

Claims (1)

(57) [Scope of utility model registration request] 1. A removable fuel tank cap in which an injection port is tightly plugged by elastically contacting a sealing member provided on the back surface of the cap body, in the central portion of the cap body 5.
The pressure shaft 7 is slidably passed through the front and back so as to increase the elastic contact force of the seal member 6 when it rises, and the upper end of the pressure shaft 7 is brought into contact with the upper surface of the cap body 5. The rotary cam 10 for vertically moving the pressure shaft 7 is pivotally supported, and the operation lever 11 set to pull up the pressure shaft 7 by swinging to the horizontal position is fixed to the rotary cam 10. On the other hand, the sealing member 6 is formed on the free end 8b of the leaf spring 8 attached to the back surface of the cap body 5 and in contact with the end surface of the injection port 2 and the fixed end 8a attached to the back surface of the cap body 5 and the inner surface of the injection port 2. The free end 8b of the leaf spring 8 is tightened by pulling up the pressing shaft 7, which is pressed by the downward elastic force generated by engaging with the downward locking cam 4 described above. Characteristic fuel tank Cap.