| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame jetting preventive trap device for improving offset efficiency in a flame and a spark by eliminating a hollow structure by reinforcing a heat absorbing capacity by providing a flame heat absorbing net. SOLUTION: This flame jetting preventive trap device has a primary flame lead-out duct 10 having a structure of superposing a large number of straps 10a of arranging a projection-recess in a radial shape on a plate surface, arranged on the outer periphery of an opening of a crank case and primarily absorbing flame flowing out to the outside via a lead-out hole 10b arranged between the straps, a first flame heat absorbing net 20 for secondarily absorbing and dispersing the flame flowing out to the outside of the primary flame lead-out duct of a net structure superposed by crossing a large number of metallic wire rods, and a secondary flame lead-out duct 30 arranged outside the first flame heat absorbing net, having a structure of superposing the large number of straps 30a, absorbing residual flame passing through the first flame heat absorbing net via a lead-out hole 30b between the straps and discharging the flame in an unsparked state in an unburning state caused by the lack of oxygen so as to be tertiary. COPYRIGHT: (C)2009,JPO&INPIT
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