Drum brake device with automatic shoe clearance adjustment device

A drum brake device with an automatic shoe clearance adjustment device,

• said automatic shoe clearance adjustment device extended between a pair of adjacent ends of facing brake shoes comprising a restricting means for restricting return positions of said brake shoes and for displacing automatically said brake shoes in a separation direction to separate each brake shoe when a shoe-to-drum clearances exceed predetermined value, wherein;
• said automatic shoe clearance adjustment device further has a preventing means to prevent an over-adjustment of said shoe-to-drum clearances by inhibiting said displacement of the brake shoes in the separation direction to separate each brake shoe due to said restricting means when at least one of an actuating force to separate said pair, of brake shoes reaches the predetermined magnitude and a temperature in the drum brake rises up to the certain degree.