CONNECTION JOINT, WASHING MACHINE INCLUDING CONNECTION JOINT, AND WASHING PROCESSING LIQUID CONTAINER

To provide a connection joint which can suppress leakage of washing processing liquid even when a container is removed from a feeding connection port before using up the washing processing liquid.SOLUTION: A connection joint 70 is connected to a first washing processing liquid feeding connection port 9 for feeding washing processing liquid into a washing tank 8 of a washing machine 1. The connection joint includes a check valve 110 for sealing washing processing liquid. The check valve 110 has a cylindrical body 111 forming an outline, a valve seat 112 which is provided below the cylindrical body 111 and forms a seal surface, a valve element 113 which moves in a vertical direction in the cylindrical body 111, a regulation member 114 which is arranged above the cylindrical body 111 and regulates movement of the valve element 113, and a spring 115 which has one side which comes into contact with a lower section of the regulation member 114 and the other side which comes into contact with the valve element 113 and biases the valve element 113 downward. A valve element seal section 117 is provided to come into contact with the valve seat 112 and prevent a flow of liquid on an outer periphery of the valve element 113.SELECTED DRAWING: Figure 10 【課題】本発明は、洗濯処理液を使い切る前に、容器を投入接続口から外した場合であっても、洗濯処理液の漏れを抑制することができる接続継手を提供するものである。【解決手段】洗濯機１の洗濯槽８に洗濯処理液を投入する第１洗濯処理液投入接続口９と接続される接続継手７０には、洗濯処理液を封止する逆止弁１１０を備えている。逆止弁１１０は、外郭を構成する筒状体１１１と、筒状体１１１の下方に備えられシール面を形成する弁座１１２と、筒状体１１１の内部を上下方向に移動する弁体１１３と、筒状体１１１の上方に配置され、弁体１１３の移動を規制する規制部材１１４と、一方が規制部材１１４の下部と接触し、他方が弁体１１３と接触し、弁体１１３を下方に向かって付勢するばね１１５とを備える。弁体１１３の外周には、弁座１１２と接触し液体の流れを阻止する弁体シール部１１７を備える。【選択図】 図１０