Agreement tools

Abstract

To provide a fastening tool that is enabled to control a position at which the movement of a driver bit is completed, by an operation of moving the driver bit in a fastening direction of a screw.SOLUTION: A fastening tool 1 comprises: a bit holding part 3 that holds a driver bit 2 attachably and detachably and can rotate in a circumferential direction of the driver bit 2 and move in an axial direction of the driver bit; a bit moving motor 50 that moves the bit holding part 3 along the axial direction; and a control part 100 that controls a position along the axial direction of the bit holding part 3 at a rotation speed of the bit moving motor 50. The control part 100 executes an initialization operation of setting a stand-by position along the axial direction of the bit holding part 3, and controls the position along the axial direction of the bit holding part 3 at the rotation speed of the bit moving motor from the stand-by position.SELECTED DRAWING: Figure 1A

Claims

1. A bit holder that detachably holds a driver bit and is rotatable in the circumferential direction and movable in the axial direction of the driver bit, The injection passage through which the driver bit passes, A motor moves the bit holder along the axial direction by rotating the pulley and winding a wire, one end of which is connected to a pulley and the other end of which is connected to the bit holder. The bit holder comprises a control unit that controls the amount of movement of the bit holder along the axial direction by the amount of rotation of the motor, starting from the standby position of the driver bit held in the bit holder in the injection passage, The control unit performs an initialization operation to set the standby position, which is the starting position for the movement of the bit holder, so that the bit holder stops at a predetermined position when the motor has been rotated by a set amount of rotation. Fastening tools.

2. The control unit performs a first initialization operation to determine the standby position of the bit holding unit, A second initialization operation is performed to move the bit holding unit to the waiting position determined in the first initialization operation. The fastening tool according to claim 1.

3. The control unit sets the standby position based on the amount of rotation of the motor when the bit holding unit is moved from one end position along the axial direction to the other end position during the first initialization operation. The fastening tool according to claim 2.

4. The control unit, The total amount of movement of the bit holder when it is moved along the axial direction from one end position to the other end position is obtained as the first amount of movement, and a preset target amount of movement of the bit holder from the one end position is set as the second amount of movement. The difference between the first movement amount and the second movement amount is set to the standby position. The fastening tool according to claim 3.

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