REVOLVING DOOR

Abstract: Revolving door with a passage space (3) enclosed by a housing (1) in which door panels (4) are mounted onto a central rotatable support (5) and one or more sensors (6) are present which, at the presence of an object within a certain distance of a door panel (4) may emit a signal, by means of which the drive of the door can be operated via a controlling device.

Description: Revolving door. The invention relates to a revolving door, comprising a passage space encompassed by a housing, with the exception of two, more in particular diametrically opposed, passage openings, within which door panels, encompassing in pairs compartments, are mounted onto a central rotating support. Such a revolving door is generally known. This known revolving door has the drawback, that when the revol¬ ving door has been put into rotation by a drive, a door panel might collide with a person or an object within the passage space. It is an object of the invention to obviate this drawback of the known revolving door. The revolving door according to the invention thereto is characterized in that one or more sensors are present, which sensors, at the presence of an object within a certain distance of a door panel, may emit a signal, by means of which the drive of the door can be operated by a controlling device. With the door according to the invention it will in this way be possible to stop the door when an object within the passage space would be approached to closely by the door panel. In an embodiment of the revolving door according to the invention, the sensors are ultra sonorous sensors, which are placed more central in the door and are directed along one or more door panels, in such a way that by means of the signal reflected by an object the drive of the door can be operated by the controlling device. In a favourable way the ultra sonorous sensors could be placed on the central support, and the sensed area, as viewed in the rotating direction of the door, can be situated in front of a door panel. In order to have the controlling device, by means of which the drive of the door can be operated, remain unaffected by unwanted reflections, the length of the sensed area of a sensor is limited to a maximum value, by that only those reflection signals can be introduced into the controlling device, having a reflection time, i.e. the time passed between the transmittal of the ultra sonorous signal and the reception of its reflection, below an adjustable maximum value. In an embodiment of the revolving door according to the invention the controlling device is an electrical or electronical circuit with a filter, by means of which the introduction of a reflected signal with a reflection time longer than the adjustable maximum value is prevented. By this measure the length of the sensored area can be adjusted to a certain value in a very accurate way. In a further embodiment of the revolving door according to the invention the pass value of the filter, which controls the length of the sensored area, is adjustable by operating the central support and/or the door panels mounted thereto and/or the drive of the door, in such a way, that the sensed length within the housing is limited up to close to this housing, to be increased with a certain value when reaching or approaching a passage opening. By this measure a greater safety is achieved against collision of the door panels with persons that approach the passage opening. According to a further feature of the revolving door according to the invention the pass value of the filter is adjustable by operating one or more switches, which can be actuated by the rotation of the door. These switches can be placed in different ways in the revolving door according to the invention. In an embodiment of the revolving door according to the invention the switches are mounted onto a door panel and/or the central support and cooperate with cams or similar operating apparatus fixedly placed with respect thereto. In a favoured embodiment of the invented revolving door and according to a last feature the switches are magneto-switches and the cooperating organs are formed by magnets. The invention will be illustrated with reference to a drawing of an example of an embodiment of the invention. In the drawing a horizontal section of the revolving door is schematically shown. As the drawing shows, the revolving door comprises a housing 1, which encompasses, with the exception of two diametrically opposed passage openings 2, the passage space 3, within which the four door panels 4 are mounted onto the central rotatable .support 5, which can be operated. As viewed in the rotating direction, ultra sonorous sensors 6 are mounted onto the support 5 and are directed along the front sides of the door panels, by means of which by a controlling device not further shown in the drawing the drive of the door can be operated, in such a way, that when a door panel approaches to closely an object or person within the path of rotation of the panel, the door is stopped, or slown down. Further, on two of the door panels 4 magneto-switches 7 are mounted, which may be operated by the magnets 8 to decrease the length of the sensed area of the sensors 6a to within and close to the wall of the housing 1. In a similar way the magneto-swithes 9 are mounted to the support 5, which can be operated by the magnets 10 to increase the length of the sensed area at the location of the passage opening 2 to without the path of rotation of the door panels 4.

Claims: C l a i m s 1. A revolving door, comprising a passage space encompassed by a housing, with the exception of two, more in particular diametrically opposed, passage openings, within which door panels, encompassing in pairs compartments, are mounted onto a central rotating support, characterized in that one or more sensors are present, which sensors, at the presence of an object within a certain distance of a door panel, can emit a signal, by means of which the drive of the door can be operated by a controlling device. 2. Revolving door according to claim 1, characterized in that the sensors are ultra sonorous sensors, which are placed more central in the door and are directed along one or more door panels, in such a way that by means of the signal reflected by an object the drive of the door can be operated by the controlling device. 3. Revolving door according to claim 2, characterized in that the length of the sensed area of a sensor is limited to a maximum value, by that only those reflection signals can be introduced into the controlling device, having a reflection time, i.e. the time passed between the transmittal of the ultra sonorous signal and the reception of its reflection, below an adjustable riiaxiirtum value. 4. Revolving door according to claim 2 or 3, characterized in that the controlling device is an electrical or electronical circuit with a filter, by means of which the introduction of a reflected signal with a reflection time longer than the adjustable rnaximum value is prevented. 5. Revolving door according to any of the preceding claims, characterized in that the pass value of the filter, which controls the length of the sensored area, is adjustable by operating the central support and/or the door panels mounted thereto and/or the drive of the door, in such a way, that the sensed length within the housing is limited up to close to this housing to be increased with a certain value when reaching or approaching a passage opening. 6. Revolving door according to claim 5, characterized in that the pass value of the filter is adjustable by operating one or more switches, which can be actuated by the rotation of the door. 7. Revolving door according to claim 6, characterized in that the switches are mounted onto a door panel and/or the central support and cooperate with cams or similar operating apparatus fixedly placed with respect thereto. 8. Revolving door according to claim 7, characterized in that the switches are magneto-switches and the cooperating organs are formed by magnets.

Inventors: HUBER ERIK JAN, HUBER JACOB ROBERT ALFRED, HUBER, ERIK, JAN, HUBER, JACOB, ROBERT, ALFRED
Applicants: HUBER ERIK JAN, HUBER JACOB ROBERT ALFRED, HUBER, ERIK, JAN, HUBER, JACOB, ROBERT, ALFRED
Application year: 1990
Main classification: E05F15
IPC codes: E05F15, E06B3