Gasket holding device
To obtain a gasket holding device which is unlikely to slip out of a bolt and facilitates mounting of the bolt thereon, a bolt mounting hole made in a metal plate constituting the gasket holding device is provided with an engaging portion which engages the bolt. This engaging portion is formed by processing part of the metal plate on the bolt mounting hole thinly such that it is elastically deformed and projected in between a crest and a root of the bolt.
1. A gasket holding device comprising a substantially rectangular flat elastically deforniable metal plate including a gasket supporting hole and a gasket introduction hole for holding a gasket,
said metal plate having a first length and a second length that is less than the first length, said metal plate including bolt mounting holes each including an open bore enabling a bolt to pass through so as to attach/detach the gasket holding device to/from an object apparatus,
the bolt mounting holes each having an engaging portion monolithic with said metal plate and projecting inwardly from a periphery of said bolt mounting hole, an inner edge of the open bore of said engaging portion projecting between a crest and a root along an outer periphery of the bolt, said engaging portion having a width in a bolt diameter direction from the inner edge to the periphery of said bolt mounting hole of from 0.5 mm to 2 mm, and said engaging portion having a thickness that is 20% to 80% the thickness of the metal plate, said engaging portion being formed as a sunken planar face on one side of said metal plate while the other side of said metal plate is substantially planar, and
opposing outer edges of said metal plate corresponding to the first length thereof, each said edge including a notch extending into said metal plate, said notches being located to form an imaginary line therebetween that is transverse to the outer edges of the plate corresponding to the first length, the imaginary line passing through a central point of said gasket supporting hole, and opposing outer edges of said metal plate corresponding to the second length thereof each being free from notches,
wherein said notches enable accurate alignment of said gasket holding device, and
wherein said engaging portion of each said bolt mounting hole prevents slip out of the corresponding bolt during mounting of the gasket holding device.
2. The gasket holding device according to claim 1 , wherein the inner edge of the opening of said engaging portion has a circular shape.
3. The gasket holding device according to claim 1 , wherein said engaging portion includes cutouts having a depth of from 0.5 mm to 2 mm extending radially outward from the inner edge toward the periphery of the bolt mounting hole.