Device for holding and centering elongated objects during rotational surface treatment

Device, such as a chuck intended for connection to a drive unit, intended to hold elongated objects in conjunction with rotating surface treatment, said device being comprised of at least one first inner part and at least one second outer part which are pivotally arranged relative to one another between at least one first position where the object can be inserted into the device and at least one second position where the object can be fixed temporarily to the device with at least three elastic bands, wherein the elastic bands are elongated and each respective elastic band in one of its ends is connected to at least one fastening device in the first inner part, and each respective elastic band in its other end is connected to at least one fastening device in the second outer part, and each respective elastic band's distance from the device's center of rotation changes during the relative turning of the first part with respect to the second outer part causing the object to be held or released from the device depending on the relative rotational orientation of the first inner part and the second outer part.

Device according to claim 9, wherein the first inner part in its front portion includes at least three fastening devices in the form of pegs which are essentially placed equidistantly from one another, and the second outer part in its front edge includes at least three fastening devices in the form of pegs which are essentially placed equidistantly from one another.