HEIGHT-REGULATING STRUCTURE FOR ELEVATED CULTIVATION SHELF, HORIZONTAL GIRTH AND PLATE FOR PREVENTION FROM BEING BURIED

PROBLEM TO BE SOLVED: To provide a height-regulating structure enabling an elevated cultivation shelf to be easily assembled in a short time even by a farmer; to provide a horizontal girth; and to provide a plate for prevention from being buried. SOLUTION: The horizontal girth 4 is inserted into a prop so as to be supported by an upper end thick part of an outer pipe 32 of the prop, and a height-regulating inner pipe 31 inserted into the horizontal girth 4 is fixed to a prescribed height by a positioning screw 43 in the height-regulating structure. The prop is obtained by inserting the height-regulating inner pipe into the outer pipe 32 of the prop. The horizontal girth 4 has an insertion hole of the height-regulating inner pipe 31, having a size smaller than the outer diameter of the outer pipe 32 of the prop and larger than the outer diameter of the height-regulating inner pipe 31, and a positioning hole formed at the side of the insertion hole. The horizontal girth 4 has a cross section in a channel shape, and the positioning hole is formed by carrying out burring processing and tapping. The plate 5 for prevention from being buried has a clearance in which a wedge 53 for fixing the plate 5 for prevention from being buried to the prop 3 is hit. COPYRIGHT: (C)2004,JPO