Drives

In compliance with the general technical approval conveyor system shutters shall be self-closing. That means in the event of fire or case of failure they shall close without any extern power supply. The closing energy can be generated by means of stored energy (e.g. from a door closer, a spring rope pulley, by a closing weight or overweight of the closing element). 

 

A distinction is made between two basic types: 

 

Basic type A   Basic type B
manual opening
  motor-driven opening
     
Grundtyp A - manuelles Öffnen   Grundtyp B - motorisches Öffnen
     
drive SB 3 includes:
  drive SB 2.4 includes:
hold-open device – magnetic clamp   hold-open device – magnetic clamp
closing speed control unit   - closing speed control unit 
    - motor for opening 

 

 

The drives shown above make use of the overweight of the closing element or a closing weight as closing energy. They are qualified for standard application. Basic type B is designed for appox. 10-100 opening cycles per day with a permanent function reliability of at least 200 000 cycles. 


For specific applications further drive designs are available. To those belong: 

 

Lever HSD 
 

As basic type A with door closer as closing element.

As basic type B with additional DC or three-phase drive. 

     
Lever HSD
 

The lever- high-speed drive (HSD) is suitable for conveyor system shutters, which are systematically closed during high transit frequency of the material to be conveyed. The opening and closing times are at minimum 0.4 m/s. Thereby 1.000.000 cycles are guaranteed.  

 

Due to the semi-circular movement the lever drives have an especially smooth start-up behavior. Conditioned by the precise guiding they are particularly suitable in the application of auxiliary units like tilting bridge with rolls, clearing devices or components for pneumatic conveyor plants. 

 

Summary of standard drives 

drive

Basic type

mode of operation 
opening/
time
closing/
time
emergency-
closing 

SB 3

A

open

manually

0,20 m/s

0,20 m/s

lever

A

open

manually

0,12 m/s

0,20 m/s

SB 2.4

B

open/closed

0,14 m/s

0,20 m/s

0,20 m/s

lever AC

B

closed

0,25 m/s

0,25 m/s

0,20 m/s

lever HSD

B

closed

0,40 m/s

0,40 m/s

0,20 m/s

 

 

*  Please note :
According to the "special provision" in the general technical approval for conveyor system shutters of group Z-6.6-... basic type A shall be applied only if the opening action can be manually performed without any problems floor based or from a stair-head. This requirement relates to all manufacturers and for all makes. In all cases in which this requirement is not possible to meet, at least basic type B shall be applied. 

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