Problem to be solved.Bottom plate 21 andFrom the width y of the bottom plate yA pair of side plates 22a which rise toward one side Z1 of the bottom direction Z of the bottom plate andA bottom up portion 23a provided at least one of a bottom plate and a pair of side platesEaves 20 withThe width of the width of the bottom plate in the width direction of one side of the thickness directionMore than 120 mmTo the other side Z2 in one direction or thickness direction in the thickness direction to the eavesWhen two housings 20a, which are different eaves, are placed over one anotherThe bottom plate of the second eaves comes into contact with the bottom of the eaves.Diagram
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