Roof-installed object securing device

A roof-installed object securing device comprising:

• a securing roof member having a flat plate-like roof member main body that is mounted on a roof structural member, a through-hole that penetrates through the roof member main body in an up-down direction, and a peripheral wall portion that extends upward from a peripheral edge of the through-hole;
• a securing member having a flat plate-like mounting piece that is located below the roof member main body of the securing roof member, is provided with a plurality of mounting holes, and is made to abut against the roof structural member, an erected portion that is erected upward from the mounting piece to be higher than the peripheral wall portion through the through-hole, a flat plate-like installing portion that extends from an upper end of the erected portion so as to be in parallel with the mounting piece, and a slit that penetrates through the installing portion in an up-down direction;
• an external thread member having a head that abuts against a lower surface of the installing portion of the securing member and a bar-like external thread portion that extends upward from the head through the slit, and movable along the slit;
• and
• a cover member having a flat plate-like top board portion that is provided with a through-hole through which the external thread portion of the external thread member passes, is installed on the installing portion, and extends outward relative to an outer circumference of the peripheral wall portion, and a side plate portion that extends downward from a peripheral edge of the top board portion to a height between an upper end of the peripheral wall portion and an upper surface of the roof member main body,
• wherein a roof-installed object is secured onto the external thread portion extending upward from the cover member.