阅读说明：本技术 一种空心基材专用螺栓 (Special bolt for hollow base material ) 是由 罗木 于 2020-04-11 设计创作，主要内容包括：一种空心基材专用螺栓,包括：螺杆,螺帽,防退垫片,销钉,细绳,活动挡块,阻停片。所述螺杆一端装配有与其大小规格配合的螺帽和防退垫片,所述螺杆另一端沿螺杆中心轴线开有一纵向缺口,缺口最深处一端设置有阻停片,所述活动挡块放置于所述螺杆缺口中,经过所述螺杆的轴心线且同时垂直于活动挡块和缺口两侧壁贯穿一销钉,所述销钉两端与螺杆表面齐平并固定,活动挡块能够以销钉为轴转动。活动挡块以销钉为界的两部分的长度都分别大于螺杆的半径且重量不等,所述活动挡块两端分别连接有细绳,在重力或者手拉细绳作用下,活动挡块转动,其两端伸出螺杆表面或者收拢。(A hollow substrate specialized bolt comprising: the screw rod, the nut, prevent moving back the gasket, the pin, the string, the activity dog, hinder and stop the piece. Screw rod one end is equipped with rather than big or small specification complex nut and prevents moving back the gasket, the screw rod other end is opened along the screw rod the central axis has a vertical breach, and the deepest department one end of breach is provided with hinders and stops the piece, the activity dog place in the screw rod breach, process the axial lead of screw rod and perpendicular to activity dog and breach both sides wall run through a pin simultaneously, the pin both ends flush and are fixed with the screw rod surface, and the activity dog can use the pin to rotate as the axle. The length of two parts of the movable check block using the pin as a boundary is respectively greater than the radius of the screw rod, the weight of the two parts is unequal, the two ends of the movable check block are respectively connected with a string, under the action of gravity or pulling the string by hand, the movable check block rotates, and the two ends of the movable check block extend out of the surface of the screw rod or are folded in.)