Barrel support apparatus and injection apparatus

A barrel support apparatus for horizontally supporting a barrel of an injection apparatus which can move forward and backward, comprising:

• a barrel support member configured to support the barrel from below and being placed on a support base supported by a spring;
• a leg portion which supports the barrel support member and is configured to move following the forward and backward movement of the barrel;
• and
• a detachment means configured to detach the support base from the barrel support member, against the elastic force of the spring that supports the support base, wherein
• the detachment means is configured to move the support base downward from a first position to a second position below the first position in a vertical direction when the barrel starts to turn,
• the first position is a position at which the support base supports the barrel and at which an upper surface of the support base comes into contact with a lower surface of the barrel support member, and
• the second position is a position at which a gap is formed between the lower surface of the barrel support member and the upper surface of the support base as a result of compression of the spring.