Plug for use in a beverage container

1. A plug for use in a beverage container having a container main body, comprising:

a plug main body detachably attached to an opening section of said container main body;

a fluid passage formed inside said plug main body, and extending from an inlet open toward an inner side of said container main body to an outlet open toward an outer side of said plug main body;

a valve body biased in a direction allowing the inlet of said fluid passage to be closed;

a cover that is provided on an upper end of said plug main body and serves to cover an upper opening section of said plug main body;

an opening and closing device provided on said cover;

a resilient member that is provided on said valve body and serves to bias said valve body in a closing direction;

a valve body cover attached to said valve body in order to prevent said resilient member from coming off;

a rotation member rotatably provided on said valve body cover;

at least two claw portions that are provided on said rotation member and serve to allow the valve body cover to be engaged with a valve shaft of the valve body; and

claw guiding grooves and steps that are provided on an upper portion of said valve body, the number of said claw guiding grooves being equal to the number of or the integral multiple of said claw portions, said steps allowing the rotation member to rotate,

wherein said valve body cover is detachable by moving the valve body cover up and down.

2. The plug for use in a beverage container according to claim 1 , wherein when said valve body cover is attached to said valve body, an upper end of said valve body is protruded from an upper portion of said valve body cover, thereby allowing said valve body cover not to abut against said opening and closing device.

3. The plug for use in a beverage container according to claim 1 , wherein said valve body is a separate component from said valve shaft such that said valve shall is provided with said valve body which closes the inlet of said fluid passage above said valve body.

4. The plug for use in a beverage container according to claim 2 , wherein said valve body is a separate component from said valve shaft and, there is provided an engagement plate that abuts against said valve body and pushes down said valve body when pushing down said valve shaft.

5. The plug for use in a beverage container according to claim 2 , wherein said valve body is a separate component from said valve shaft, and said valve shaft is provided with said valve body which closes the inlet of said fluid passage above said valve body.

6. The plug for use in a beverage container according to claim 2 , wherein said valve body is a separate component from said valve shaft and, there is provided an engagement plate that abuts against said valve body and pushes down said valve body when pushing down said valve shaft.

7. The plug for use in a beverage container according to claim 3 , wherein said valve body is a separate component from said valve shaft and, there is provided an engagement plate that abuts against said valve body and pushes down said valve body when pushing down said valve shaft.

8. The plug for use in a beverage container according to claim 1 , wherein said valve body cover includes right and left finger-grips, and engagement openings detachably engaged with said rotation member are provided at the right and left finger-grips.

9. The plug for use in a beverage container according to claim 2 , wherein said valve body cover includes right and left finger-grips, and engagement openings detachably engaged with said rotation member are provided at the right and left finger-grips.

10. The plug for use in a beverage container according to claim 8 , wherein lower portions of the right and left finger-grips extend outward.

11. The plug for use in a beverage container according to claim 9 , wherein lower portions of the right and left finger-grips extend outward.