Transport robot, transport system, and transport method

1. A transport robot, being configured to transport a transported object(s) in a state of sandwiching the transported object(s) by cooperating with another transport robot when transporting the transported object(s),

wherein the transport robot comprises:

a main body;

a contact part that contacts the transported object(s); and

a rotation mechanism having an arm(s), the contact part being attached to one end of the arm(s), and the arm(s) being rotatably supported to the main body in the vicinity of the other end of the arm(s), and

wherein the rotation mechanism comprises a restoration mechanism that restores the arm(s) in a state of being rotated from a predetermined position so that the arm(s) is returned to the predetermined position using cams.

2. The transport robot according to claim 1 , wherein:

the transport robot comprises a pair of wheels rotatably attached to both sides of the main body; and

the rotation mechanism makes the arm rotatable relative to the main body about an axis passing through a midpoint of width between the pair of wheels.

3. The transport robot according to claim 1 , further comprising:

a guide mechanism that is attached to the main body, wherein the guide mechanism is configured to guide the rotation of the contact part relative to the main body and support pressing of the contact part to the transported object.

4. The transport robot according to claim 2 , further comprising:

a pair of drive parts that are attached to the main body and drive the pair of wheels;

a control part that controls the pair of drive parts; and

a communication part,

wherein the control part is connected communicably with the other transport robot via the communication part, and controls the pair of drive parts by cooperating with the other transport robot.

5. The transport robot according to claim 4 , further comprising a load sensor that detects a load when the contact part and the transported object contact each other,

wherein a state in which the contact part and the transported object come into contact, the control part controls the pair of drive parts so that the load falls within a predetermined numerical range based on the load detected by the load sensor.

6. The transport robot according to claim 4 , further comprising an angle sensor that detects a rotation angle of the arm relative to the main body,

wherein the control part controls the pair of drive parts so that the rotation angle of the arm relative to the main body becomes an angle set depending on a traveling direction based on the angle detected by the angle sensor.

7. A transport system that comprises a plurality of transport robots that transport a transported object(s), being configured to transport the transported object(s) in a state of sandwiching the transported object(s) by cooperating with a plurality of transport robots when transporting the transported object(s),

wherein the transport robot comprises:

a main body;

a contact part that contacts the transported object(s); and

a rotation mechanism having an arm(s), the contact part being attached to one end of the arm(s), and the arm(s) being rotatably supported to the main body in the vicinity of the other end of the arm(s), and

wherein the rotation mechanism comprises a restoration mechanism that restores the arm(s) in a state being rotated from a predetermined position so that the arm(s) is returned to the predetermined position using cams.

8. A transport method that uses a plurality of transport robots to transport a transported object(s), wherein the transport method comprises transporting the transported object(s) in a state of sandwiching the transported object(s) by cooperating with a plurality of transport robots when transporting the transported object(s),

wherein the transport robot comprises:

a main body;

a contact part that contacts the transported object(s); and

a rotation mechanism having an arm(s), the contact part being attached to one end of the arm(s), and the arm(s) being rotatably supported to the main body in the vicinity of the other end of the arm(s), and

wherein the rotation mechanism comprises a restoration mechanism that restores the arm(s) in a state being rotated from a predetermined position so that the arm(s) is returned to the predetermined position using cams.