Patent ID: 8677523

Claim:
A bed arrangement, comprising: a wheelchair comprising: a seating bottom portion composed of a chair back bottom member, a chair waist bottom member, a chair knee bottom member, a chair leg first bottom member and a chair leg second bottom member bendably coupled to each other; and a chair back bottom support member supporting said chair back bottom member, a chair base portion supporting said chair waist bottom member, a chair knee bottom support member supporting said chair knee bottom member, a chair leg first bottom support member supporting said chair leg first bottom member and a chair leg second bottom support member supporting said chair leg second bottom member; a bed main body portion comprising: a bed bottom portion composed of a bed back bottom member, a bed waist bottom member, a bed knee bottom member and a bed leg bottom member bendably coupled to each other; and a bed back bottom support member supporting said bed back bottom member, a bed base portion supporting said bed waist bottom member, a bed knee bottom support member supporting said bed knee bottom member, and a bed leg bottom support member supporting said bed leg bottom member; wherein said wheelchair and said bed main body are combinable into a combined state in which: in a longitudinal direction of said bed bottom, a length of said chair waist bottom member and a length of said bed waist bottom member are equal, a length of said chair knee bottom member and a length of said bed knee bottom member are equal, and a total length of said chair leg first bottom member and said chair leg second bottom member is equal to a length of said bed leg bottom member, a joint portion between said bed back bottom member and said bed waist bottom member and a joint portion between said chair back bottom member and said chair waist bottom member are arranged on an identical straight line, a joint portion between said bed waist bottom member and said bed knee bottom member and a joint portion between said chair waist bottom member and said chair knee bottom member are arranged on an identical straight line, a joint portion between said bed knee bottom member and said bed leg bottom member and a joint portion between said chair knee bottom member and said chair leg first bottom member are arranged on an identical straight line, and said wheelchair and said bed main body portion are capable of performing posture change together by bending at a said joint portion.