Robot including tool having shock-absorbing member
A robot shares a work space with a person, to perform an operation. The robot includes a shock-absorbing member which covers the periphery of at least a base part of a working tool attached to an robot arm, a detector which is provided for the robot arm, to detect an external force input via the shock-absorbing member, and a robot control device which stops the robot when determining, based on information of the detected external force, that the working tool collides with the person. The external force is transmitted from the working tool to the robot arm, and is detected by the detector.
1. A robot that shares a work space with a person, to perform an operation, wherein the robot includes a robot arm to which a working tool is attached, the working tool having a base part and a movable part provided in the base part, the robot comprising:
a shock-absorbing member which covers the periphery of at least the base part of the working tool and which is made of a material having a rigidity lower than that of the base part and the movable part of the working tool;
a detector which is provided for the robot arm, to detect an external force input on the working tool via the shock-absorbing member; and
a robot control device which determines, based on information of the external force detected by the detector, whether the working tool collides with the person, and stops the robot when determining that the working tool collides with the person,
wherein
the external force input on the working tool is transmitted via the shock-absorbing absorbing member to the base part of the working tool and then transmitted to the robot arm, and then is detected by the detector.
2. The robot according to claim 1 , wherein at least a part of the surface of the movable part except for the surface of a portion necessary to be exposed to accomplish the purpose of an operation is covered by the shock-absorbing member.
3. The robot according to claim 2 , further comprising a fixing tool for detachably securing the shock-absorbing member to the base part of the working tool, wherein
an outermost part of the fixing tool is positioned more inward than an outermost part of the shock-absorbing member which is compressed by receiving a load from the outside.
4. The robot according to claim 1 , wherein the shock-absorbing member is configured by laminating a plurality of layers having different rigidities.
5. The robot according to claim 1 , wherein at least an outermost peripheral part of the shock-absorbing member includes an elastic body composed of a polymer compound.
6. The robot according to claim 1 , wherein the working tool is a gripping device comprising at least two fingers as the movable part.