Abstract: A robot arm includes a robot hand including a hand base to which first and second finger connection portions are connected, and a finger moving portion to move the first and second finger connection portions with respect to the hand base such that a distance between a first finger and a third finger increases or decreases. A rotation axis rotating the hand base passes through a midpoint between fingertips of the first finger and the third finger while the first finger and the third finger are perpendicular to the hand base. the robot arm includes a forearm and a wrist joint to connect the robot hand to the forearm rotatably with two rotational degrees of freedom or one rotational degree of freedom. The forearm is rotatable around a forearm rotation axis that passes through the forearm and is the rotation axis that allows the hand base to be rotated.

Abstract: Provided is a working machine in which a counterweight is appropriately supported, thereby avoiding deterioration of workability. The working machine includes: a motor; a plunger reciprocated in a front-back direction by a drive of the motor; a crankshaft rotated around an axis extending in an up-down direction by the drive of the motor; a counterweight driven in a front-back direction by rotation of the crankshaft so as to cancel out vibration due to the reciprocation of the plunger; a transmission mechanism (gear, crankshaft, and connector) converting a rotation driving force of the motor into a driving force for the plunger and counterweight and transmitting the driving force to the plunger and counterweight; and a gear case (transmission mechanism accommodation portion and lid portion) accommodating the transmission mechanism and elastically supporting the counterweight in the right-left direction.

Abstract: A robot hand operation device through which an operator inputs an operation instruction to move a robot hand including at least three fingers includes: a main body portion held by the operator; and joysticks each being corresponded with each of the fingers of the robot hand to be operated and provided in the main body portion in a number that is the same as that of the fingers. When the operator operates each of the joysticks, the operation instruction to move the finger corresponded with the each of the joysticks is inputted, and when the operator does not operate each of the joysticks, the operation instruction to move the finger corresponded with the each of the joysticks is not inputted.

Abstract: In order to provide a working machine capable of suppressing an increase in size, a working machine that rotates a working tool with motive power of a motor includes a transmission mechanism that transmits a rotational force of the motor to the working tool, a front case in which the transmission mechanism is disposed, a holding tool that is attached to the front case so as to protrude from an outer surface of the case and is gripped by a worker, and an attaching hole which is provided in the front case and to which the holding tool is attached, and the attaching hole penetrates the front case in plan view intersecting with an axis that is a rotation center of the working tool.

Abstract: In order to provide a working machine capable of suppressing an increase in size, a working machine that rotates a working tool with motive power of a motor includes a transmission mechanism that transmits a rotational force of the motor to the working tool, a front case in which the transmission mechanism is disposed, a holding tool that is attached to the front case so as to protrude from an outer surface of the case and is gripped by a worker, and an attaching hole which is provided in the front case and to which the holding tool is attached, and the attaching hole penetrates the front case in plan view intersecting with an axis that is a rotation center of the working tool.

Abstract: An endoscope hood for holding a medical treatment instrument inserted through an insertion channel of an insertion section of an endoscope comprises a base body portion which is capable of being fitted onto a distal end portion of the insertion section and a retainer body portion which is formed as an integral piece with the base body portion and shaped to unshroud an observation window and a lighting window and in which a predetermined length of through bore is formed so as to be in alignment with an insertion channel opening when the base portion is fitted onto the disal end portion. The retainer body portion retains a distal end portion of the medical treatment instrument inserted in the through bore through the insertion channel opening.