Door safety system

A door safety system wherein signal receiving sections or signal transmitting sections of a non-contact proximity switch for detecting a person or an obstacle and for controlling movements of moving doors, are provided at a side of one of the moving doors at safety sensible areas, and wherein signal transmitting sections corresponding to the signal receiving sections or signal receiving sections corresponding to the signal transmitting sections of the non-contact proximity switch are separately provided at a fixed immovable portion corresponding to the side, so that the person or the obstacle can be detected with respect to a moving space of the moving doors so as to prevent the person or the obstacle from colliding with the moving doors and the safety sensible areas sequentially shift to the movement of the doors, the door safety system further comprising:

• electric power supply cables for supplying at least one of electric power and signals to the moving doors;
• and
• a cable guide for guiding and holding the electric power supply cables by a flexible support member,
• wherein the support member is made of strip steel product, which is arc-shaped and curved in a transversal direction, wherein one end of the support member is fixed to the moving doors and the other end of the support member is fixed to the fixed immovable portion, and wherein the at least one of the electric power and the signals are transmitted through the cable guide comprising parallel portions which are parallel to the fixed portion of the moving doors and the fixed immovable portion, and a U-shaped curved portion substantially having a predetermined radius of curvature, where the arc-shaped convex portion constitutes an outer or an inner surface.

A door safety system, comprising:

• at least one signal receiving sections and signal transmitting sections of a first non-contact proximity switch, provided at a side of moving doors at safety sensible areas, for detecting a person or an obstacle and for controlling a movement of the doors to prevent the person or the obstacle from colliding with the moving doors;
• and
• at least one signal transmitting sections, which corresponds to the signal receiving sections, or at least one signal receiving sections, which corresponds to the signal transmitting sections, provided at an immovable portion, so that the person or the obstacle can be detected with respect to a moving space of the moving doors so as to prevent the person or the obstacle from colliding with the moving doors, and the safety sensible areas sequentially shift according to the movement of the door, and
• said door safety system further comprising a second non-contact proximity switch having a spatial directivity directed to an entrance direction and another spatial directivity directed to an exit direction, so that a person or an obstacle getting near the doors can be detected even if the doors are closed.