Patent ID: 7316380

Claim:
A detachable wire holder comprising: a rail engagement member which is slidable along a rail and which is detachable from the rail by rotating with respect to the rail by a predetermined angle; and a wire hook attached to said rail engagement member; wherein said rail engagement member comprises: a shaft threaded into an attachment portion for said wire hook at a first end of the shaft; a head formed on a second end of the shaft engageable with a hollow engagement portion of the rail; a rotation preventive portion formed under said head; a locknut threaded onto said shaft; a washer fitted onto said shaft and arranged between said locknut and said head; and a bias member which is fitted onto said shaft and which biases said washer toward said head; and wherein said detachable wire holder is operable to assume: a lock state in which said locknut is threadedly advanced on the shaft closer to said head to hold tightly the engagement portion of the rail between said head and said washer, whereby said rail engagement member is unslidably and undetachably held to the rail; a slidable state in which said locknut is threadedly moved on the shaft away from said head by a predetermined distance, to hold said rail engagement member slidably to the rail so as not to be rotatable with respect to said rail due to said rotation preventive portion; and a detachable state in which said locknut is threadedly moved on the shaft further away from said head than said predetermined distance to enable said rail engagement member to rotate with respect to the rail, whereby said rail engagement member is detachable from the hollow engagement portion of the rail.