EARTHQUAKE-RESISTANT PARTITION PANEL

PROBLEM TO BE SOLVED: To provide an earthquake-resistant partition panel in a normal structure where a panel board is formed by using a lock for an erected support post, in which the panel board is prevented from being detached from the support post not only by general earthquake vibration but also by long-term earthquake vibration by adding necessary minimum changes while keeping a basic structure as it is.SOLUTION: A lock includes a first lock piece which is inserted into a lock hole on a support post, and a second lock piece which is inserted into an engage hole on a panel board. A connection part is provided by forming an upward opening groove and a downward opening groove between the first lock piece and the second lock piece. A length (L2) from a lower end of the second lock piece to the connection part is set larger than a length (L1) from an upper end of the second lock piece to the connection part, a vertical dimension (D) of the engage hole on the panel board is set a little larger than a vertical dimension (L) of the second lock piece, and a lateral width between upper and lower portions of the engage hole is set narrow.