JPS5931957Y2 - cap device - Google Patents

Description

[Detailed description of the invention] This invention is a sealing material used in a cap device that tightens the cap against the cap by interposing a sealing material (gasket) between the cap and the ring-shaped upwardly curved edge of the container cap. Accordingly, it is an object of the present invention to provide a specially shaped sealing material that can completely prevent gas leakage from a sealing portion by utilizing self-sealing properties that utilize the internal pressure even if high internal pressure is generated within the container.

The illustrated example shows a so-called bayonet type tank cap device, which is known and used for motorcycle fuel tanks, etc., as an example of a cap device, and 1 is a cap, 2 is a cap provided on a tank 21, and 23 is the top surface of the cap. Ring-shaped upward curved edge on the outer periphery, 11 is the inner part 1 of the cap 1
This is an engaging pawl member that engages with the mouthpiece side slope cam 22, which has an end protruding laterally and is always pushed up and held by a spring 13.

The slope cam 22 is made by bending the opening edge of the mouthpiece 2 inward to the tank, and using the bent edge as a slope cam.

3 is a ring-shaped sealing material such as rubber or synthetic resin fitted to the base of the cap inner part 12, and 4 is a ring-shaped sealing material 1 for reducing mutual sliding friction resistance between the cap 1 and the sealing material 3 during the opening/closing operation of the cap. , 3 is a friction-reducing and slipping member made of tetrafluoroethylene resin, copper, lead, etc., interposed between the mutual contact surfaces of the members.

Then, insert the cap inner part 12 into the opening of the cap 2 by aligning the engaging claw of the cap inner part 12 with the notch hole (not shown) formed in the opening edge of the cap 2, and then insert the cap inner part 12 into the opening of the cap 2. When rotated forward, the engaging claw 11 engages the inclined cam 22.
, and rotates along the cam surface while receiving a downward force against the spring 13, and in the process, the sealing material 3 is strongly pressed between the cap 1 and the ring-shaped curved edge 23 of the cap 2. The cap 1 is clamped and tightened.

When the cap 1 is rotated in the opposite direction, the tightening loosens and the cap can be removed from the cap 2.

The present invention uses a ring as the sealing material 3 used in the cap device as in the above example, which protrudes downward from the cap convex edge receiving surface of the sealing material 3 and contacts the inner diameter side wall surface 23□ of the curved edge 23 on the entire circumference. At the same time, a lip portion 31 is formed in the thick portion of the sealant sandwiched between the cap 1 and the curved edge 23 of the cap, and the thickness is applied to the upper and lower portions 33 from the inner diameter side, leaving a connecting portion 32 on the outer diameter side of the sealant. A ring-shaped groove 35 is formed to cut out .34 mm.

That is, the cap 1 is attached to the base 2 with the sealing material interposed therebetween.
When the internal pressure of the tank 21 increases in the tightened state, the lip portion 31 of the sealing material 3 is caused to open around the entire circumference of the inner diameter side wall surface 23 of the curved mouth edge 23 due to the tank internal pressure combined with the opening action of the internal pressure of the split groove 35. (self-sealing).

The pressing force increases in accordance with the internal pressure of the tank, and even if high pressure is generated within the tank, it can sufficiently prevent gas leakage, and the intended purpose is well achieved.

The upper thick part 33 bordering on the groove 35 of the sealing material 3 is extended in the inner radial direction as shown in the illustrated example, and a ring-shaped part that contacts the base surface of the cap inner part 11 is attached to the edge of the extended part. If the lip portion 36 is formed, this lip portion 36 will also be pressed tightly against the outer circumferential surface of the base portion of the cap inner portion 11 by the tank internal pressure, so that gas leakage can be more effectively prevented.

In order to prevent excessive expansion of the sealing material 3 in the outer radial direction due to tank internal pressure, a tensile ring 14 such as a metal ring is fitted around the outer periphery of the sealing material 3, or the outer periphery 15 of the cap 1 is fitted around the outer periphery of the sealing material 3. It is best to extend it so as to surround it.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway sectional view with the cap tightened;
FIG. 2 is an enlarged sectional view of the sealing material. 1 is a cap, 12 is a part of the cap inner, 11 is an engaging claw, 13 is a push-up spring, 21 is a tank, 2 is a cap, 3 is a sealing material, 4 is a sliding member, 23 is a curved edge of the cap, 31 .3
6 is a ring-shaped lip portion, 35 is a split groove, and 14 is a tensile ring.

Claims (1)

[Scope of utility model registration request] The sealing material 3 is interposed between the cap 1 and the ring-shaped upwardly curved edge 23 of the container mouthpiece 2, and the convex edge of the mouthpiece of the sealing material 3 is used as an intervening sealing material of a cap device that tightens the cap 1 to the mouthpiece 2. A curved edge 23 is made to protrude downward on the receiving surface side.
A ring-shaped lip portion 31 is formed in contact with the inner diameter side wall surface 231 of the inner diameter side wall surface 231 on the entire circumference, and the thickness of the ring-shaped lip portion 31 is applied to the thick portion of the sealant sandwiched between the cap 1 and the curved edge 23 of the mouthpiece. 33.34 up and down from the inner diameter side, leaving the connecting part 32 on the side.
A sealing material for a cap device in which a ring-shaped groove 35 is formed.