Blackboard apparatus

Abstract

Abstract PURPOSE:To reverse a blackboard without allowing the same to collide with a frame body by setting the pivot position of the blackboard to the frame body on the side lower than the center in the vertical direction of the frame body to reverse the blackboard at the position lower than the hinging height of the frame body. CONSTITUTION:The central parts 2b of a black board 2 in the vertical direction on both left and right sides thereof are pivotally fitted to the side frame materials 12 of a frame body 1 through shafts 24 so that the pivot positions P of the blackboard 2 to the frame body 1 are set on the side lower than the centers N in the vertical direction of the frame body 1. Concretely, the pivot positions P are set at the positions capable of securing a safe distance L capable of avoiding collision between the blackboard 2 and a wall surface 3 even when the blackboard 2 is made movable in such a state that the frame body 1 is revolved forwardly by about 40 deg.. Therefore, even when the frame body 1 is revolved up to the angle of about 40 deg., the revolving locus Q of the blackboard is present at the position lower than the hinging position R of the frame body 1.

Inventors

• 👤 Yoji Nakamichi
• 👤 中道　洋治
• 👤 Eiji Nogi
• 👤 野木　英司

Bibliographic Details