The Semi Automatic Twistlock IF-56 has been specially developed to quickly and securely anchor two vertically stacked sea containers. This semi-automatic twistlock is distinguished by the fact that it automatically locks when placed in a ISO 1161: 1984 corner casting. The yellow point always points upwards. Locking when placing is done automatically, but when disconnecting the orange button with stainless steel cable must be pulled. The Twistlock IF-56 can be mounted in the corner of the top and bottom container. In total, four (semi-automatic) twistlocks are required to connect two sea containers.

In terms of application, the Semi Automatic Twistlock IF-56 is very similar to the IF- 51 Intermediate twistlock . Both form a solid lock between two sea containers. Still, there are two important differences. First, the IF-56 automatically locks when placed on another container. With the IF-51 the handle must be manually afterwards converted. The application of the semi-automatic twistlock IF-56 generally results in a faster process.

Advanced twistlock for quick stacking of containers

The Semi Automatic Twistlock IF-56 has been specially developed to quickly secure two vertically stacked shipping containers. This semi-automatic twistlock stands out because it locks automatically when placed in an ISO 1161:1984 corner casting. The yellow tip always points upwards. Locking on insertion is automatic, but releasing requires pulling the orange knob with stainless steel cable. The Twistlock IF-56 can be attached to both the corner point of the upper and lower container. A total of four (semi-automatic) twistlocks are required to couple two shipping containers.

The different uses make this semi-automatic twistlock multi-purpose. One disadvantage is that working with this twist lock requires some explanation. With these conditions taken into account, the IF-56 is a good option for loading and unloading sea containers as quickly as possible.

Lock closes fully automatically when placing container

In terms of application, the Semi Automatic Twistlock IF-56 is very similar to the IF-51 Intermediate twistlock. Both form a sturdy locking device between two shipping containers. However, there are two main differences. First, the IF-56 locks automatically when placed on and another container. With the IF-51, the lever has to be manually turned afterwards. The use of the semi-automatic twistlock IF-56 usually results in a faster operation.

Placing twistlock on top of container

Once the four semi-automatic twistlocks are placed at the top of a container, another container can be placed on top. The special shape of the yellow tip rotates when the weight of the container fully lands on the twistlock. The built-in spring comes under tension. Once the yellow tip of the Semi Automatic Twistlock IF-56 is fully in the corner of the container, the back pressure drops and the yellow tip shoots back into the locked position. The upper container is now connected to the shipping container below.

Placing twistlock at bottom of container

Placing an IF-56 twistlock at the bottom of the container (to be placed) works in a similar way. The yellow tip also points upwards in this situation and the twistlocks are now locked into the upper container. When the truck or crane driver lowers the container, the four semi-automatic twistlocks with the galvanised tip enter the lower container. The galvanised tip at the bottom of the twistlock rotates due to the curved shape and weight of the container. This puts tension on the built-in spring. After being fully lowered, the lower tip shoots back to its original position. The two containers are firmly anchored to each other.

Unlocking the upper container

Unlocking the twistlock is easy by pulling the orange button backwards and locking it upwards in the slot (photo 2). Tightening the stainless steel cable causes the inner mechanism to rotate. This also changes the rotation angle of both points at the top and bottom of the IF-56. The cable can then be locked in two positions: at the bottom and at the top (towards the yellow tip). Pulling and securing the cable in the upper slot rotates the interior and brings the yellow tip into neutral position. The upper container is thus no longer locked and is ready to be lifted. The four IF-56 twistlocks remain in the lower container. A new container can be placed on the semi-automatic twistlocks if required.

Unlocking lower container

If, when splitting the coupled containers, the twistlocks must remain attached to the upper container, the stainless steel cable can be locked in the lower slot (photo 3). In this process, the yellow tip remains locked and precisely the (galvanised) lower tip comes into neutral position. In this situation, the lifted container is fitted with four semi-automatic twist locks at the bottom. Besides the slot at the bottom, this design also includes a notch on the left side of the orange knob. This notch serves exactly the same purpose and can be useful in a situation where space is at a premium. For example, if the twistlock is attached directly to the deck, for example in a raised deck socket or stanchion (photo 4).

Galvanised steel housing with coated points and steel cable

The Semi Automatic Twistlock IF-56 is made of high-quality galvanised steel. This protects the Twistlock against various weather conditions and seawater. The protective coating to prevent corrosion ensures that the twistlock can be used for long periods of time. The steel cable to unlock the twistlock has a diameter of 5 mm and is made of stainless steel.

Technical drawing available

The exact dimensions of the Semi Automatic Twistlock IF-56 can be found on the technical drawing in .pdf format. A 3D drawing is also available as a .stp file. This allows the IF-56 to be loaded into a technical drawing package for designing custom-made constructions.

The Semi-Automatic Twistlock IF-56 is similar to the following items from other manufacturers

B6.11-S, C5AM-DF, CI-45-1, CV-15, T5, T-5L, T-5R, TL-A, T-5