A safety inspection device and inspection method for wooden roofs inside residential buildings

Abstract

A safety inspection device for an internal wooden roof of a residential building comprises a first ring 2 composed of two first half rings spliced together, and a second ring 4 composed of two second half rings spliced together. The second ring 4 is rotatably arranged below the first ring 2. The upper end of the first ring 2 is equipped with a clamping mechanism, which receives the wood placed therein at the center of the first ring 2. The inner edge of the second ring 4 is equipped with multiple uniformly distributed extrusion rods (Figure 2, item 5), which move inward along the diameter direction of the second ring 4 to clamp the wood placed therein. The inner edge of the first half ring 1 is equipped with a movable locking semicircle ring. The locking semicircle ring moves to compress an end of the extrusion rod. The second ring 4 is equipped with a movable locking block to (cooperatively with the semicircle ring) grip the extrusion rod. The outer end of the extrusion rod is equipped with a brush, and the second ring 4 is equipped with a drawing paper placed below the brush. When the drawing paper moves relative to the brush, the brush draws a movement trajectory on the drawing paper. The outer edge of the second ring 4 is also equipped with a first annular groove housing a ball bearing and a lever, the lever moving the ball bearing to roll in the first annular groove.

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