DOOR CHECK DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a door check device capable of preventing the occurrence of abnormal sound and disagreeable vibration. SOLUTION: This door check device includes a first one-way valve 381 provided in a first pipe passage 371 to allow a liquid to flow from a first chamber 357 into a second chamber 359 and prevent the liquid from flowing from the second chamber 359 into the first chamber 357. When flow resistance in an opening (hole part) 371c is RI, flow resistance in a valve element 391 is RV, and flow resistance in a hole (outlet) 411d positioned on the downstream side more than the valve element 391 is RO, the following relation is satisfied: RI