Patent ID: 8346135

Claim:
A powder conveyance device, comprising: a powder container section configured to contain powder; a powder conveyance pipe configured to guide downstream the powder mixed with air from the powder container section; and a powder conveyance member configuration to convey the powder installed in the powder conveyance pipe toward a conveyance destination; said powder conveyance pipe including: a first conveyance section having a supply inlet and communicating with the powder container section, said first conveyance section being configured to receive the powder from the powder container through the supply inlet; a second conveyance section communicating downstream with the first conveyance section via a first bending section, said second conveyance section downwardly extending to the conveyance destination being inclined from a horizontal at a larger angle than the first conveyance section; a third conveyance section communicating downstream with the second conveyance section via a second bending section, said third conveyance section extending toward the conveyance destination being inclined from the horizontal at a smaller angle than the second conveyance section, said third conveyance section having a replenishment outlet for replenishing the powder from the powder conveyance pipe to the powder conveyance destination; and a space restriction member at least arranged in the second conveyance section and configured to partially close an inner space of the second conveyance section, wherein said space restriction member is arranged from the second conveyance section to the third conveyance section via the second bending section.