| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that a structure for detecting a displacement member of a sub-tank, which supplies a liquid to a head fixedly disposed, becomes complicated.SOLUTION: A head unit 100 is formed by arranging multiple heads 101 in a zigzag manner. A liquid is supplied from a sub tank 104 to the multiple heads 101 through a distribution member 103. The sub tank 104 includes a displacement member 205 which displaces according to liquid residual quantity. A filler detection sensor 301 which detects the displacement member 205 is disposed so as to move along a head arrangement direction. An image formation device includes a linear encoder 313 which detects a position of the filler detection sensor 301 in the head arrangement direction. |
