Movable or removable closures – With operator for movably mounted closure – Operating lever or link and closure swing about parallel axes
Reexamination Certificate
1999-08-19
2001-05-01
Stodola, Daniel P. (Department: 3634)
Movable or removable closures
With operator for movably mounted closure
Operating lever or link and closure swing about parallel axes
C049S339000
Reexamination Certificate
active
06223469
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a concealed drive system for a pivot-hung door with an electronic control and/or regulation system that contains at least one memory and one microprocessor for an at least single-panel door. The door panel of the single-panel door is driven by an electro-mechanical drive unit that acts in the opening and closing directions, whereby the drive unit consists essentially of a drive motor with a force transmission unit connected to it, and the force transmission unit has a drive shaft that is connected with one end of an actuator lever. The entire pivot-hung door drive system is installed in a concealed manner inside a door panel or inside a casing.
2. Background Information
The purpose of automatic door drive systems is to make it easier to open and close the doors. Such automatic door drive systems are gaining importance not only in buildings used for public and business purposes, such as, for example, office buildings, hospitals and residential facilities for older people, but automatic door drive systems are also being installed with increasing frequency in homes and apartments that are equipped for access by the physically disabled. For this purpose, the door drive systems are essentially always mounted on the door panel or above the door frame or casing.
German Patent No. DE 42 31 984 A discloses an electro-mechanical pivot-hung door drive system that is equipped with a data processing unit for optimal operation. Connected with the data processing unit is a motor control unit that transmits its output signal to a geared motor. The process of opening such a pivot-hung door is thereby initiated by means of a sensor signal, and is automatically executed by the drive system. Simultaneous with the opening, an energy storage device is supplied with the necessary energy so that such a door can be returned to a secure closed position without the input of additional electrical energy. In the event of a failure of the motor control unit, it is thereby also possible to close the driven door panel securely even in the absence of outside power.
German Patent No. DE 296 04 692 U1 discloses a device for the actuation of a window panel. For this purpose, chain elements are embedded in the panel, and are moved by a worm gear of a motor provided with a gear train.
German Utility Model 295 21 068 describes a drive system for a pivot-hung door installed in emergency escape routes. In this case, a drive system is used that moves only in the direction of opening the pivot-hung door, and thereby simultaneously supplies a power storage mechanism in the form of a spring element with the necessary energy, so that following the opening process, including the potential length of time the pivot-hung door is held open, the door can be properly closed again without additional energy. The entire drive unit is thereby installed in a concealed manner above the pivot-hung door and inside the frame. The pivot-hung door is driven either directly by the drive shaft of the drive system, or by means of an actuator arm inside the profile of the door, which interacts with a sliding piece that can move in a slide rail.
On the drive system there is also a device that makes it possible, by applying a manual force, to uncouple the pivot-hung door from the drive system beyond the closed position. This device is a mechanical coupling that transmits force only in one direction. The coupling thereby consists of a locking pin that is attached positively and non-positively to the drive shaft, and at least one locking notch in the locking pin. Inside the locking notch there is a pin that is spring-loaded and is provided with a continuously adjustable force. The force adjustment capability makes it possible to adjust the release force continuously.
In an additional embodiment, it is also possible that the upper crossbar of the pivot-hung door can be provided with two hook-shaped support arms that are engaged with each other. The support arms are thereby engaged with each other so that the pivot-hung door can also be uncoupled from the drive system only in one direction, namely in the direction of the emergency escape route.
The problem with such door drive systems, however, is that plans for the incorporation of such drive systems must be made as early as during the design of the building, because otherwise it is impossible to have the required passage height.
OBJECT OF THE INVENTION
The object of the invention is to create an automatic drive system that is very small for a pivot-hung door, and the appearance of which does not adversely affect the architectonic appearance of a door. It must also be possible to manufacture such a pivot-hung door drive system economically and to operate it with little or no maintenance.
SUMMARY OF THE INVENTION
The present invention teaches that this object can be accomplished by a pivot-hung door drive system with an electronic control system that contains at least one memory and one microprocessor, for an at least single-panel door, the door panel of which can be driven by an electro-mechanical drive unit. The electro-mechanical drive unit acts in the opening and closing directions, whereby the drive unit can include a drive motor with a transmission and a power transmission unit for the door connected to it, whereby the power transmission unit consists of a screw with a screw nut that partly surrounds the screw, which screw nut is positively and non-positively connected with a toothed rack, and a drive shaft can be engaged with its gear teeth in gear teeth of the toothed rack. The drive shaft can be connected with one end of an actuator lever and the pivot-hung door drive system can be installed inside a door panel or inside a door frame or casing. The dependent claims, and features hereinbelow, disclose appropriate refinements of the present invention.
An additional objective in the design of a compact pivot-hung door drive system was the ability to install the drive system in a concealed manner, which means that the pivot-hung door drive system can be embedded inside a door or casing. Modifications to the building, e.g. holes in the floor or walls, thereby preferably become unnecessary. The known art discloses door-closers, e.g. the “DORMA ITS 96”, that are concealed inside doors or door frames. The torque is introduced into the door by means of a lever that is supported in a sliding rail. As a result of the transmission action of the sliding rail, in combination with this door closer, which has a reciprocating control cam, there is a decreasing opening moment. By means of the realization of the cam profile, it thereby becomes possible to design an almost unrestricted configuration of the torque curve.
To create a simple, economical drive system for a pivot-hung door, the invention can use a toothed rack with gear teeth that have a large modulus that is capable of transmitting the torques that occur on pivot-hung doors of this type. These gear teeth can be realized in a toothed rack that has a polygonal cross section, and is preferably mounted non-rotationally between two plates. The toothed rack can thereby be connected in a driving connection with a drive shaft that preferably has identical corresponding gear teeth and is mounted in the cover plates. As a result of the sliding motion of the toothed rack, the stationary drive shaft is rotated, and as a result of the connected lever, in connection with a slide that can be movably mounted in a slide rail, that causes the movements of the door. A screw or spindle or threaded nut can be positively and non-positively connected with the toothed rack for the movement in translation. Inside the screw nut a screw, preferably a recirculating ball screw, can be guided on one end, whereby the other end of the screw can be held in a mounting. The screw is thereby driven by a drive shaft that extends out of a transmission. The transmission can thereby be connected with a drive motor. To detect the position of the connected pivot-hung door, there can be a distance senso
Cohen Curtis A.
Dorma GmbH + Co. KG
Nils H. Ljungman & Associates
Stodola Daniel P.
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