Conveyance seat

A conveyance seat comprising:

• a seat body including a seat back and a seat cushion;
• and
• a cushion lock apparatus turnably coupling the seat cushion to the seat back and locking turning motion of the seat cushion when the seat body is in a seatable state in which an occupant is able to be seated,
• wherein the conveyance seat is switchable between the seatable state and a movement state in which the seat body is moved from the seatable state,
• the cushion lock apparatus includes
• a lock member attached to one of the seat cushion or the seat back,
• a lock target member attached to the other one of the seat cushion or the seat back and engaging with the lock member to lock the turning motion of the seat cushion, and
• a position holding member pivotally attached to one of the seat cushion or the seat back and attached to peripheries of the lock member and the lock target member and holding at least one of positions of the lock member and the lock target member to hold a state in which a clearance is, in the seatable state, formed between an engagement portion provided at the lock member and an engagement target portion provided at the lock target member,
• wherein a contact portion contacting a contact target portion provided at one of the lock member or the lock target member to hold the one of the positions is formed at the position holding member,
• the cushion lock apparatus further includes a biasing member attached to the position holding member and biasing the position holding member in a direction of causing the contact portion to contact the contact target portion,
• wherein the position holding member is biased by the biasing member, and is movable between a holding position as a position at which the contact portion contacts the contact target portion and a release position as a position at which the contact portion does not contact the contact target portion, and
• when the position holding member is moved, in response to a load from an outside in the seatable state, from the holding position to a release position against biasing force of the biasing member, the engagement portion of the lock member and the engagement target portion of the lock target member engage with each other.

A method of assembling a conveyance seat that has a seat body including a seat back and a seat cushion, and a cushion lock apparatus turnably coupling the seat cushion to the seat back and locking turning motion of the seat cushion when the seat body is in a seatable state in which an occupant is able to be seated, wherein the conveyance seat is switchable between the seatable state and a movement state in which the seat body is moved from the seatable state, the method comprising:

• preparing the seat body, and
• assembling the cushion lock apparatus to the seat body,
• wherein the assembling the cushion lock apparatus to the seat body comprises:
• attaching a lock member to one of the seat cushion or the seat back,
• attaching a lock target member to the other one of the seat cushion or the seat back, and engaging the lock target member and the lock member to lock the turning motion of the seat cushion,
• pivotally attaching a position holding member to one of the seat cushion or the seat back and attaching position holding member to peripheries of the lock member and the lock target member for holding at least one of positions of the lock member and the lock target member, and
• arranging the position holding member so that, when the seat body is in the seatable state, the position holding member holds a state in which an engagement portion provided at the lock member and an engagement target portion provided at the lock target member are engaged and in which a clearance is formed between the engagement portion and the engagement target portion, and the position holding member holds a state in which the lock member and the lock target member are not in contact with each other.