To prevent the dust of material soil and soil improving material in a mixer from flowing back to a material soil hopper side in a soil improving machine having a material soil carrying body carrying the material soil chuted into a material hopper and the mixer mixing and agitating the material soil carried by the material soil carrying body and the soil improving material.
The mixer 4 comprises a material soil chuting port 20a in which the material soil is chuted and a soil improving material chuting port 20b in which the soil improving material is chuted. The area of the mixer ranging from the material soil hopper 5 to the material soil chuting port 20a is covered by a cover body 22 and the cover body 22 is sucked by a dust collector to prevent the dust in the mixer 4 from flowing back from the material chuting port 20a to the material soil hopper 5 side via. the inside of the cover body 22.
MATSUDA HOMARE
YASUDA TOYOTARO
MIYANO YASUAKI
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