Bed and separating method of the same

1. A bed, comprising:

a first rail;

a second rail;

a wheelchair having a first armrest mounting unit to and from which the first rail is attachable and detachable in a first side part thereof, and a second armrest mounting unit to and from which the second rail is attachable and detachable in a second side part thereof; and

a bed main body portion having a first support portion and a second support portion in a first side part thereof and a bed rail in a second side part thereof, wherein

the first support portion has a first bed mounting unit to and from which the first rail or the second rail is attachable and detachable, and

the second support portion has a second bed mounting unit to and from which the first rail or the second rail is attachable and detachable.

2. The bed according to claim 1 , wherein the first rail is attachable to and detachable from the first armrest mounting unit as an armrest of the wheelchair,

the second rail is attachable to and detachable from the second armrest mounting unit as an armrest of the wheelchair,

the first rail is attachable to and detachable from the first bed mounting unit as a bed rail of the bed, and

the second rail is attachable to and detachable from the second bed mounting unit as a bed rail of the bed.

3. The bed according to claim 1 , wherein the first support portion is positioned in a front end of the first bed mounting unit protruding toward a side of the first armrest mounting unit, and

the second support portion is positioned in a front end of the second bed mounting unit protruding toward the side of the first armrest mounting unit.

4. The bed according to claim 1 , wherein in a case where the wheelchair and the bed main body portion are coupled, the first armrest mounting unit is arranged between the first bed mounting unit and the second bed mounting unit.

5. The bed according to claim 1 , wherein both the first rail and the second rail have a support body, and an armrest portion provided in an upper part of the support body, the armrest portion protruding toward a side thereof only on one side surface of the support body,

in a case where the first rail is installed in the first armrest mounting unit and the second rail is installed in the second armrest mounting unit, the armrest portion of the first rail and the armrest portion of the second rail protrude toward an outer side of the wheelchair, and

in a case where the first rail is installed in the first bed mounting unit and the second rail is installed in the second bed mounting unit, the armrest portion of the first rail and the armrest portion of the second rail protrude in an opposite direction to the bed rail.

6. The bed according to claim 5 , wherein the first rail and the second rail have a plate portion covering a surface of the support body, and

there is a gap between the armrest portion and the plate portion.

7. The bed according to claim 1 , wherein a state that support rod portions extending from lower ends of the first rail and the second rail are inserted into insertion holes of the first armrest mounting unit, the second armrest mounting unit, the first bed mounting unit, and the second bed mounting unit is a state that the support rod portions are coupled to the mounting units,

the insertion holes each have a non-point symmetrical shape with respect to a center of each of the insertion holes, and

each of the support rod portions has a same shape as a shape of each of the insertion holes.

8. The bed according to claim 1 , wherein the bed main body portion has a coupling mechanism portion to be brought into contact with a convex portion of the wheelchair to lock the wheelchair.

9. The bed according to claim 8 , wherein the coupling mechanism portion includes a locking projection and an elastic portion supporting the locking projection.

10. The bed according to claim 1 , wherein in the coupling mechanism portion, lock of the wheelchair is cancelled by installing the second rail in the second armrest mounting unit.

11. A separating method of the bed according to claim 1 , comprising:

a first armrest formation step for removing the second rail from the second bed mounting unit and installing the second rail in the second armrest mounting unit; and

a second armrest formation step for removing the first rail from the first bed mounting unit and installing the first rail in the first armrest mounting unit.

12. The separating method of the bed according to claim 11 , further comprising, before the first armrest formation step and the second armrest formation step, moving the wheelchair to expose the second armrest mounting unit between the wheelchair and the bed main body portion.

13. The separating method of the bed according to claim 12 , further comprising in a state that the wheelchair is locked to the bed main body portion, moving the wheelchair to expose the second armrest mounting unit between the wheelchair and the bed main body portion.

14. A bed, comprising:

a first rail;

a second rail; and

a wheelchair having a first armrest mounting unit to and from which the first rail is attachable and detachable in a first side part thereof, a second armrest mounting unit to and from which the second rail is attachable and detachable in a second side part thereof, and a bed main body portion having a first bed mounting unit and a second bed mounting unit arranged so as to sandwich the first armrest mounting unit between the first bed mounting unit and the second bed mounting unit in the first side part thereof;

wherein the bed main body portion has a bed rail in a side part thereof, and

the first rail or the second rail is attachable to and detachable from the first bed mounting unit and the second bed mounting unit.