Enclosing apparatus and image forming system

An enclosing apparatus for enclosing an enclosure into an envelope at an enclosing position, the enclosing apparatus comprising:

• a conveyance roller configured to convey the envelope to the enclosing position;
• an envelope conveyance path through which the envelope is conveyed;
• and
• an enclosing support disposed in the envelope conveyance path and configured to support enclosing of the enclosure into the envelope,
• the enclosing support configured to retract a flap of the envelope from the envelope conveyance path while the conveyance roller conveys the envelope to the enclosing position,
• wherein the enclosing support includes
• a flap conveyance path branching from the envelope conveyance path,
• a flap guide defining the flap conveyance path, and
• a flap conveyance direction switching pawl configured to orient the flap toward the flap conveyance path and press the flap against the flap guide when the flap reaches a predetermined position before the envelope reaches the enclosing position,
• wherein the enclosing support further includes a first biasing member configured to bias the flap conveyance direction switching pawl to press against the flap guide,
• wherein the enclosing support further includes an enclosing guide defining a part of the envelope conveyance path,
• wherein the enclosing guide is configured to guide the enclosure to the enclosing position together with the flap conveyance direction switching pawl, and
• wherein the enclosing support further includes a second biasing member configured to bias the flap guide to press against the flap conveyance direction switching pawl.