Safety device for a door system
First Claim
1. A safety device for a door system, in particular for an automatic sliding door of a vehicle, having a pressure medium-operated servomotor for providing an opening force and a closing force to the door panel, and further including a door control with an operating pressure supply line associated with the pressure side of the servomotor acting in a closing direction of the door panel, and further comprising, in order to limit the closing force for the door panel, closing force sensor means for resiliently sensing the drive force of the servomotor during the closing process, and control valve means coupled to the means and moving therewith for automatically venting unthrottled the closing pressure side of the servomotor above a given response value of the closing force sensor means.
2 Assignments
0 Petitions
Accused Products
Abstract
To provide, for a sliding door with a pneumatically operated door panel servomotor, a safety device which operates independently of the usual reversing device and which limits the maximally active door closing force to an exactly settable value in a simple and reliable manner, there is associated with the servomotor, a limit value control circuit with a closing force sensor which senses the reaction force of the servomotor acting on the door jamb side during the closing process and a sensor-controlled three-position control valve which freely vents the closing pressure side of the servomotor above a given response value of the closing force sensor.
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Citations
9 Claims
- 1. A safety device for a door system, in particular for an automatic sliding door of a vehicle, having a pressure medium-operated servomotor for providing an opening force and a closing force to the door panel, and further including a door control with an operating pressure supply line associated with the pressure side of the servomotor acting in a closing direction of the door panel, and further comprising, in order to limit the closing force for the door panel, closing force sensor means for resiliently sensing the drive force of the servomotor during the closing process, and control valve means coupled to the means and moving therewith for automatically venting unthrottled the closing pressure side of the servomotor above a given response value of the closing force sensor means.
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8. A safety device for a door system, in particular for an automatic sliding door of a vehicle, having a pressure medium-operated servomotor for providing an opening force and a closing force to the door panel, and further including a door control with an operating pressure supply line associated with the pressure side of the servomotor acting in a closing direction of the door panel, and further comprising, in order to limit the closing force for the door panel, closing force sensor means for resiliently sensing the drive force of the servomotor during the closing process, said closing force sensor means comprising spring means for supporting the servomotor against a fixed support, and control valve means coupled to the sensor means and moving therewith for venting unthrottled the closing pressure side of the servomotor above a given response value of the closing force sensor means.
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9. A safety device for a door system, in particular for an automatic sliding door of a vehicle, having a pressure medium-operated servomotor for providing an opening force and a closing force to the door panel, and further including a door control with an operating pressure supply line associated with the pressure side of the servomotor acting in a closing direction of the door panel, and further comprising, in order to limit the closing force for the door panel, closing force sensor means for resiliently sensing the drive force of the servomotor during the closing process, and control valve means coupled to the sensor means and moving therewith for venting unthrottled the closing pressure side of the servomotor above a given response value of the closing force sensor means, said servomotor further comprising a double-action pneumatic long-stroke piston-cylinder unit having a piston rod connected to the door panel and a main cylinder coupled to the fixed support through the closing force sensor means.
Specification