Connecting device

Device for connecting a first component to a second component, the first component being formed with a recess extending therethrough and comprising, serially and in communication with one another, an elongated recess portion of given diameter, a first shallow recess portion coaxial to and having a larger diameter than said elongated recess portion, part of said first shallow recess portion being an undercut of an end wall portion of the first component, and a second shallow recess portion eccentric to said first shallow recess portion and to said elongated recess portion, said first component being formed with a lateral groove at the location of and communicating with said shallow recess portions, a pin-shaped member having a shaft with a head at one end thereof and formed with a thread at the other end thereof, said shaft extending through said recess formed in the first component and being securable by the threaded end thereof in a correspondingly threaded bore formed in the second component so that said pin-shaped member by said head thereof engages the first component at one side of the latter and presses the first component at the opposite side thereof against the second component, and means for securing said pin-shaped member against rotation relative to the first component, said securing means comprising a cup-shaped member surrounding said head of said pin-shaped member and engageable with said head so as to be mutually fixed against relative rotation, said cup-shaped member having a disc-shaped base receivable in said undercut part of said first shallow recess portion and formed with a projection engageable in said lateral groove so as to secure said cup-shaped member and said pin-shaped member accordingly against rotation relative to the first component, said head being formed with means accessible from the free end surface thereof and engageable by a pin rotating device for rotating said pin-shaped member relative to said cup-shaped member so as to disengage said pin-shaped member from said cup-shaped member.