Monitoring device (30) for monitoring a drive element (12) of a conveyor (1), in which the drive element (12) extends in a conveyance direction. The monitoring device (30) comprises a mechanism (39) attached to the drive element (12) and configured for mechanically monitoring a distance between two predetermined locations of the drive element (12) spaced apart in the conveyance direction. The monitoring device (30) is further configured for triggering an alarm signal in case the monitored distance exceeds a predetermined limit.

Monitoring device (30) for monitoring a drive element (12) of a conveyor (1), in which the drive element (12) extends in a conveyance direction. The monitoring device (30) comprises a mechanism (39) attached to the drive element (12) and configured for mechanically monitoring a distance between two predetermined locations of the drive element (12) spaced apart in the conveyance direction. The monitoring device (30) is further configured for triggering an alarm signal in case the monitored distance exceeds a predetermined limit.

Monitoring device (30) for monitoring a drive element (12) of a conveyor (1), in which the drive element (12) extends in a conveyance direction. The monitoring device (30) comprises a mechanism (39) attached to the drive element (12) and configured for mechanically monitoring a distance between two predetermined locations of the drive element (12) spaced apart in the conveyance direction. The monitoring device (30) is further configured for triggering an alarm signal in case the monitored distance exceeds a predetermined limit.

Monitoring device (30) for monitoring a drive element (12) of a conveyor (1), in which the drive element (12) extends in a conveyance direction. The monitoring device (30) comprises a mechanism (39) attached to the drive element (12) and configured for mechanically monitoring a distance between two predetermined locations of the drive element (12) spaced apart in the conveyance direction. The monitoring device (30) is further configured for triggering an alarm signal in case the monitored distance exceeds a predetermined limit.

An automatic transport device includes a first side and a second side opposite to each other, the first side includes a main drive device, a step drive wheel and a first handrail drive wheel in transmission connection with the main drive device, and the second side is provided with: a step driven wheel; a second handrail drive wheel, the handrail of the automatic transport device wraps around the first handrail drive wheel and the second handrail drive wheel; a first tensioning device and a first transmission member, the first tensioning device is capable of adjusting the movement of the step driven wheel relative to the step drive wheel, thereby maintaining the first transmission member between the step drive wheel and the step driven wheel in tension; and a second tensioning device and a second transmission member, the second handrail drive wheel is in transmission connection with the step driven wheel.

A system for braking an escalator or moving walkway includes a handrail and passenger support in registration with one another so as to move together. A braking tensioner selectively increases tension in the handrail during operation. The increased tension serves to frictionally brake the handrail and hence the passenger support. The braking tensioner may be located in any of various locations depending upon system design, and may be driven in any suitable manner, e.g., hydraulically, electrically, electromagnetically, and so on. Frictional wear on the handrail is reduced by the fact that the described braking system spreads the frictional load over a large area of the handrail, e.g., the many locations where the handrail contacts the underlying support throughout its length.

A system for braking an escalator or moving walkway includes a handrail and passenger support in registration with one another so as to move together. A braking tensioner selectively increases tension in the handrail during operation. The increased tension serves to frictionally brake the handrail and hence the passenger support. The braking tensioner may be located in any of various locations depending upon system design, and may be driven in any suitable manner, e.g., hydraulically, electrically, electromagnetically, and so on. Frictional wear on the handrail is reduced by the fact that the described braking system spreads the frictional load over a large area of the handrail, e.g., the many locations where the handrail contacts the underlying support throughout its length.

A drive chain band for a chain drive device having chain links and pins is provided. The drive chain band may include one or more drive bands, and a plurality of connectors disposed on the one or more drive bands. Each connector may have a toothed profile configured to directly receive and engage the pins.

An automatic transport device includes a first side and a second side opposite to each other, the first side includes a main drive device, a step drive wheel and a first handrail drive wheel in transmission connection with the main drive device, and the second side is provided with: a step driven wheel; a second handrail drive wheel, the handrail of the automatic transport device wraps around the first handrail drive wheel and the second handrail drive wheel; a first tensioning device and a first transmission member, the first tensioning device is capable of adjusting the movement of the step driven wheel relative to the step drive wheel, thereby maintaining the first transmission member between the step drive wheel and the step driven wheel in tension; and a second tensioning device and a second transmission member, the second handrail drive wheel is in transmission connection with the step driven wheel.