Coupling device

A coupling device for coupling a plug device and a supply pipe to each other, the plug device being for supplying a liquid, and the supply pipe being for supplying the liquid to a supply target, the coupling device comprising:

• a cylindrical housing part, the plug device being inserted in one end side of the housing part, and the supply pipe being connected to the other end side of the housing part;
• a valve part configured to, due to contact with the plug device inserted in the housing part, be in an open state where the liquid flows into the coupling device from the plug device;
• a bellows part having an expandable internal flow channel formed in the bellows part, the liquid flowing in from the plug device being supplied to the supply pipe through the expandable internal flow channel when the valve part is in the open state;
• and
• a flow channel part forming a supply flow channel, the liquid being supplied from the internal flow channel to the supply pipe through the supply flow channel,
• wherein one of the bellows part and the flow channel part is formed of a conductive fluororesin material, the conductive fluororesin material containing a fluororesin material and a conductive material dispersed in the fluororesin material, and is in electrical conduction with a grounding part maintained at a ground potential.