Combination of cover receiving framework and support trail device for pit application

摘要

Topic As the pit the floor face which concave facilities is done forms with the cinder concrete which placing is done with respect to concrete throb, at the time of the application of the pit device which the cover receiving framework the provide on the side is done in the aperture edge of that pit, compaction and cost retrenchment of term of works are assured.Solutions On the formation aspect Waf of the molding box Wa which in order support trail device A, the screw the support board on 12 which stops and that support board 12 the height control fits by one body to the anchor 11 which stands up on concrete throb S possibly in the standards 13 which stand facilities are done and those standards 13 at the same time the screw being done to stop, cover receiving framework K for one body provides with clamp possible clamp component C, in cover receiving framework K, the inside surface of pit P to form is raised on concrete throb S the attach and detach possibly this the molding box back face 7 which touches and that molding box back face 7Penetrating completely, the nail hole 8 which the Interpolation it makes pass the nail 9 which locks molding box Wa in cover receiving framework K can provide. Choice figure Drawing 1