Securing member

A securing member comprising:

• an upper piece that is capable of abutting against an upper surface of a plate-like module or is capable of being inserted into a groove formed on a side surface of the plate-like module, and extends in a right-left direction;
• a shaft portion that extends downward from a center of the upper piece;
• a lower piece that extends to both sides from a lower end of the shaft portion so as to be larger than the upper piece and has an abutment portion which is capable of abutting against a lower surface of the plate-like module on an upper portion of the lower piece;
• and
• a mounting hole that is formed on the lower piece at one side of both sides with respect to the shaft portion and penetrates through the lower piece in an up-down direction,
• wherein the lower piece is mounted on a mounting target of the plate-like module through the mounting hole in a state where the side surface of the plate-like module is made to abut against or be close to the shaft portion so that the upper piece is lowered to abut against the upper surface of the plate-like module or a surface in the groove and the abutment portion of the lower piece abuts against the lower surface of the plate-like module.