Gas valve having automatically blocking means

A gas valve having automatically blocking means comprising:

• a support member having a cylindrical portion, wing portions protruding from the cylindrical portion, supporting portions intersecting at ends of the wing portions in a criss-cross form, and a through hole formed at the center of the supporting portions;
• a blocking member having a shaft portion inserted into the through hole, an opening and closing portion formed integrally with the shaft portion in such a way as to be restricted in position by the supporting portions, and a tip portion protruding from the center of the opening and closing portion;
• a spring fit onto the shaft portion in such a way as not to be separated from the shaft portion owing to a head portion formed on the shaft portion;
• a main body having a fixing hole into which the cylindrical portion coated with an adhesive is inserted, a passage formed in front of the fixing hole in such a way as to be opened and closed by the opening and closing portion, and a spiral portion formed on an outer circumferential portion thereof;
• a valve body having an inlet adapted to insert the main body thereinto and a spiral hole formed in the inlet in such a manner that the spiral portion is joined to the spiral hole;
• and
• a ball valve mounted in the valve body and positioned to push the tip portion of the opening and closing portion which blocks the passage when it moves to a closed position.