The present invention has an object to provide a measuring apparatus which
can surely prevent the collision of a moving member.
A measuring apparatus 10 comprises a moving member 18 which is moved to
obtain information about a workpiece and might collide with the object 12,
a moving device 20 for moving the moving member 18, and a protector 50 for
preventing the moving member 18 from colliding with the object 12, the
protector 50 including a protector body 52 provided in the moving member
18, a sensor 54 protruded from the protector body 52 by a predetermined
length to come in contact such that a distance between the object 12 and
the protector body 52 has a predetermined value or less and deformed
elastically by a contact with the object 12, a strain detector 56 for
detecting an amount of an elastic deformation of the sensor 54, and a
controller 22 for stopping the relative movement of the moving member 18
by the moving device 20 or setting the relative movement in a reverse
direction when the amount of the elastic deformation detected by the
strain detector 56 exceeds a predetermined amount.
