Sole structure and shoe including the same

1. A sole structure for a shoe, the sole structure comprising:

a first sole portion including a first sole body and a first connecting portion provided behind the first sole body;

a second sole portion disposed behind the first sole portion and including a second sole body and a second connecting portion provided in front of the second sole body; and

a connecting shaft provided along a direction perpendicular to a surface of the first connecting portion so as to connect the first connecting portion and the second connecting portion together,

either one of the first sole portion or the second sole portion being freely turnable around the connecting shaft relative to the other one of the first sole portion or the second sole portion in a foot width direction, and

the connecting shaft being freely turnable relative to at least one of the first connecting portion and the second connecting portion.

2. The sole structure of claim 1 , further comprising:

a stopper mechanism configured to limit a turnable range around the connecting shaft by the first sole portion and the second sole portion coming into contact with each other.

3. The sole structure of claim 1 , wherein

at least one of the first connecting portion or the second connecting portion has a first elongate hole extending in a foot length direction, and

the connecting shaft is slidably connected to the first elongate hole.

4. The sole structure of claim 1 , wherein

at least one of the first connecting portion or the second connecting portion has a second elongate hole extending in the foot width direction, and

the connecting shaft is slidably connected to the second elongate hole.

5. The sole structure of claim 2 , wherein

either one of the first connecting portion or the second connecting portion has a protrusion spaced apart from the connecting shaft in the foot width direction as viewed from above, the protrusion protruding vertically,

the other one of the first connecting portion or the second connecting portion has a guide configured to guide the protrusion through turning of the first sole portion or the second sole portion, and

the turnable range of the first sole portion or the second sole portion is limited by the protrusion coming into contact with one of both end portions of the guide.

6. The sole structure of claim 1 , further comprising:

a first arm provided for the first connecting portion; and

a second arm provided for the second connecting portion, wherein

the connecting shaft includes a first connecting shaft, a second connecting shaft, and a third connecting shaft,

one end portion of the first arm is connected to the first connecting portion to be turnable around the first connecting shaft,

one end portion of the second arm is connected to the second connecting portion to be turnable around the second connecting shaft,

the other end portion of the first arm and the other end portion of the second arm are connected together to be turnable around the third connecting shaft, and

either one of the first sole portion or the second sole portion is turnable around the connecting shafts relative to the other one of the first sole portion or the second sole portion in the foot width direction, and is movable relative to the other one in the foot length direction.

7. The sole structure of claim 1 , wherein

the first connecting portion and the second connecting portion are connected together while overlapping each other in the vertical direction, and

either one of the first sole portion or the second sole portion turns relative to the other one of the first sole portion or the second sole portion in the foot width direction while the first connecting portion and second connecting portion keep overlapping each other in the vertical direction.

8. A shoe comprising the sole structure of claim 1 .

9. A shoe comprising the sole structure of claim 2 .

10. A shoe comprising the sole structure of claim 3 .

11. A shoe comprising the sole structure of claim 4 .

12. A shoe comprising the sole structure of claim 5 .

13. A shoe comprising the sole structure of claim 6 .

14. A shoe comprising the sole structure of claim 7 .