Abstract:
Powered safety curtains are disclosed herein. An example barrier for an opening includes a motorized drive unit and a curtain to be suspended from the motorized drive unit. The curtain includes a leading edge and a lateral edge. The leading edge of the curtain is to be selectively moveable to a closed position where the curtain obstructs the opening and to an open position where the curtain uncovers the opening. The barrier also includes a track to be disposed along the lateral edge of the curtain, a guide plate to be carried by the curtain and extend into the track, and a nonferrous guide member to be attached to the guide plate. The example barrier also includes a first safety device comprising a first wireless portion and a first electrical portion. The first wireless portion is to be attached to the nonferrous guide member. The first electrical portion is to be mounted relative to the track. The first electrical portion is to have a first activated state and a first deactivated state. The first electrical portion is to be in the first activated state when the first wireless portion is in proximity with the first electrical portion as a result of the leading edge of the curtain being at the closed position. The first wireless portion is to be in the first deactivated state when the first wireless portion is remote relative to the first electrical portion as a result of the leading edge of the curtain not being in the closed position.
Abstract:
Systems and methods to detect and warn proximate entities of interest are described herein. An example signal generation system for a vehicle capable of different modes of movement includes a detector to determine at least one property of vehicle movement and an output representative of that at least one property and a selectively variable signal generator includes an input to receive the at least one output representative of the at least one property of vehicle movement and, responsively, generates a selected signal based on the received output. In some examples, a detector on a pedestrian detects the selected signal from the signal generator and, responsively, provides an output indicative of a vehicle in proximity to the pedestrian. In some examples, a trajectory vector is generated for at least two entities of interest based on at least one characteristic of movement of each entity. Each entity's trajectory vector is expanded and each entity's expanded trajectory vector is analyzed for overlap with the other entity's expanded trajectory vector to assess the possibility of a collision between them.
Abstract:
An example of a horizontal side -moving door with a side -winding or horizontally translating curtain includes an upper seal comprising an upper edge of the curtain sliding within a groove of a seal guide. To protect the door in the event of an impact, at least a portion of the curtain's upper edge can restorably pull out from within the groove. To avoid damage in certain situations, the seal guide might resiliently deflect as well. After an impact, the curtain's upper edge is automatically fed back into the groove by simply opening and closing the door. During normal operation, the curtain's upper edge advantageously deflects in response to air pressure against either side of the door. In some examples, the seal guide is of a uniform cross-section, which makes the seal guide easy to manufacture by way of a conventional plastic extrusion process.
Abstract:
A door system (10) includes an antenna-based proximity sensor with a releasable electrical connector (14) that enables the sensor to function with a breakaway feature of the door. The sensor includes a signal generator (44) and a door-mounted antenna (38) for sensing a body or an obstruction near the door. The signal generator ( or oscillator) can be installed at various locations between a power source (46) and the antenna. In some cases, the wiring between the antenna and the power source includes a rotatable feature to accommodate the rotation of a drum that carries a wrap-up, pliable door panel. The rotatable feature may be a rotatable electrical connector, or it may be a wire having sufficient length and flexibility to twist about itself within the hollow interior of the drum.
Abstract:
A door system (10) includes an antenna-based proximity sensor with a releasable electrical connector (14) that enables the sensor to function with a breakaway feature of the door. The sensor includes a signal generator (44) and a door-mounted antenna (38) for sensing a body or an obstruction near the door. The signal generator ( or oscillator) can be installed at various locations between a power source (46) and the antenna. In some cases, the wiring between the antenna and the power source includes a rotatable feature to accommodate the rotation of a drum that carries a wrap-up, pliable door panel. The rotatable feature may be a rotatable electrical connector, or it may be a wire having sufficient length and flexibility to twist about itself within the hollow interior of the drum.
Abstract:
A door signaling system can warn a forklift driver on one side of a closed door that a pedestrian may be on the other side, thereby averting a collision between the forklift and the pedestrian. In some embodiments, the signaling system includes an elongate light prominently disposed along a perimeter of the doorway. In response to the pedestrian being at the door or in response to some other predetermined door-related event, the light warns the forklift driver of the situation or event. In some embodiments, the signaling system warns the driver by sounding a horn on the driver's vehicle or by shining a light upon the door or against the floor.
Abstract:
Powered safety curtains are disclosed herein. An example safety barrier assembly to control access to equipment includes a track and a barrier including a receptacle. The barrier is to be moveable within the track between an open position and a closed position. The open position is to enable access to the equipment, the closed position to substantially prevent access to the equipment. The example safety barrier assembly also includes a sensor to identify when the safety barrier is in the closed position and a securing device comprising a portion to be received by the receptacle when the barrier is identified as being in the closed position. An interaction between the portion and the receptacle is to prevent the barrier from moving out of the closed position.
Abstract:
An example of a horizontal side -moving door (10) with a side -winding or horizontally translating curtain (12) includes an upper seal (20) comprising an upper edge (16) of the curtain (12) sliding within a groove (18) of a seal guide (20). To protect the door (10) in the event of an impact, at least a portion of the curtain's upper edge (16) can restorably pull out from within the groove. To avoid damage in certain situations, the seal guide (20) might resiliently deflect as well. After an impact, the curtain's upper edge (16) is automatically fed back into the groove (18) by simply opening and closing the door (10). During normal operation, the curtain's upper edge (16) advantageously deflects in response to air pressure against either side of the door (10). In some examples, the seal guide (20) is of a uniform cross - section, which makes the seal guide (20) easy to manufacture by way of a conventional plastic extrusion process.