Circulation device for preventing movement of floor opening protective cover plate and application method of device
A protection cover and floor technology, applied in the processing of building materials, construction, building structure, etc., can solve problems such as difficult management, easy damage to floor opening protection, easy movement, etc., to reduce manpower and material resources and eliminate potential safety hazards. Effect
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[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0016] A device of the present invention that can prevent the protective cover of the floor opening from moving, such as figure 1 with figure 2 As shown, the device includes a protective cover plate 1 that can be placed on a hole 2 of a building to cover the hole 2. A groove 3 is provided in the middle of the protective cover plate 1, and a through hole is provided in the middle of the groove 3. The bolt 4 passes through the through hole in the middle of the groove 3 and is threadedly connected with the bolt sleeve 5. A first link 6 is welded to the lower end of the bolt sleeve 5, and a second link 7 is connected to the lower end of the first link 6 , The steel plate 9 is connected to the lower end of the second link 7 by a fixed bolt 8; during production, the ...
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