Patent ID: 8790011

Claim:
A noncontact type seal device attached to a slider of a linear guide device with a clearance of a predetermined distance with respect to outer surfaces of a guide rail, the seal device sealing an opening part of a space which is formed between the guide rail and the slider, wherein the linear guide device is provided with the guide rail extending in an axial direction and the slider attached to the guide rail in a manner enabling relative movement in the axial direction, the seal device is provided with positioning parts which contact the outer surfaces of the guide rail to prevent the outer surfaces of the guide rail from contacting with the facing surfaces of the seal device which face the outer surfaces of the guide rail, when attaching the seal device to the slider which has been attached to the guide rail, and which maintain a distance between the outer surfaces of the guide rail and the facing surfaces the same as the distance of the clearance, the positioning parts comprise projections which project out from the facing surfaces, a length of a projection from the facing surfaces is same as the distance of the clearance, and the seal device is a member attached to facing parts of the slider which face side surfaces of the guide rail having a substantially cross-sectional rectangular shape and sealing the opening part of the space which is formed between the side surfaces of the guide rail and the facing parts of the slider.