| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover opening adaptor that is an auxiliary jig for opening a cover, the cover opening adaptor allowing an ordinary cover opening bar to be used even when an engaging hole for cover opening does not open along a peripheral edge of a cover body, offering greater cover opening force than when opening by inserting the bar into an engaging hole for cover opening formed on the cover body, being compact, light-weight, of a simple configuration and manufactured readily at a low cost.SOLUTION: A cover opening adaptor 100 includes: an adaptor body 110 having a protrusion 111 formed on an undersurface side, the protrusion having a point of application 111a in contact with a tip part of a bar 300 for cover opening; a plurality of contacting members 120 supporting the adaptor body 110 in a way that allows height adjustment and being in contact with a cover body 210 of a cover for an underground structure; a fulcrum member 130 having a fulcrum part 132 in contact with the bar 300 and a groove part that holds the protrusion 111 of the adaptor body movably only in a vertical direction; and an engaging pin 140 inserted into an opening 112 of the adaptor body from above and having an engaging part engaged on an undersurface of an engaging hole part 211 for cover opening of a cover body.SELECTED DRAWING: Figure 1 |
