General twistlocks to stack and lock ISO containers, connect cargo containers, and secure containers on ship decks or trailers.
ISO Standard Twist Lock for Container
Description
A retractable twist lock with set operating lever designed as a fixed or retractable twistlock for securing containers on any type of trailer.
The securing head retracts below deck level to allow non-containerised loads to be carried.
Dimensionally compatible with ISO corner castings.
Twistlock Type Retractable
Purpose
Designed to secure ISO containers and special containers to any type of trailer.
Features and Benefits
Can be used as fixed or retractable on any type of trailer.
Allows non-containerised loads to be carried.
Simple securing operation.
Dimensionally compatible with ISO corner castings and aperture plates.
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Standard: ISO/TS16949:2002
Size: 150mmx150mm
Material: Casting Steel
Weight: 7.50 kg
Finish: Red Oxide Primer.
Package: 100pcs per wooden box
Packing
100pcs per wooden box
Or packed as customer requirement
Delivery:
Sample: Within 7-10 working days.( FREIGHT COLLECT )
/elektrotechnische-grundlagen-heinz-meister-pdf-writer.html. Mass Production:7-10 working days for one 20ft container
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ISO Standard Twist Lock for Container
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A twistlock and corner casting together form a standardized rotating connector for securing shipping containers. The primary uses are for locking a container into place on a container ship, semi-trailer truck or railway container train, and for lifting of the containers by container cranes and sidelifters.
The twistlock was developed in Spokane, Washington in the 1950s by transport engineer Keith Tantlinger.[1][2] The relative obscurity of this invention belies its importance to a more efficient world trade and transport, as the Tantlinger lock made handling and stacking standard containers much easier.
A major advantage of this approach to attachment is that containers, which may be stored or transported without being inspected for months at a time, do not require any maintenance in order to function effectively. Even with long term exposure to the weather the container remains as simple to move as ever. Only when corrosion is very extensive (to the extent of being easily visible) does the twistlock become dangerous to move the crate. The male part (which is more exposed and susceptible to damage) is placed on vehicles and equipment that are inspected very frequently, and will work with all standard containers.
The female part of the connector is the 7×7×41⁄2 in (180×180×110 mm) corner casting, which is fitted to the container itself, and has no moving parts, only an oval hole in the bottom. The hole is an oval 4.9 in (124.5 mm) on the long axis with two flat sides 2.5 in (63.5 mm) apart. The male component is the twistlock, which is fitted to cranes and transport bases. This can be inserted through the hole (it is roughly 4.1 in or 104.1 mm long and 2.2 in or 55.9 mm wide), and then the top portion (normally pointed to make insertion easier) is rotated 90° so that it cannot be withdrawn. The mechanism is similar to that of a Kensington lock, but on a much larger scale. The maximum size and position of the holes in the connector is defined in international standard ISO 1161:1984. The tensile strength of a twistlock is rated at either 20 or 25 tonnes.[3]
Some twistlocks have built-in levers or mechanisms, while simpler versions require tools for installation or removal. Some twistlocks are permanently installed (e.g. on the decks of container ships or on the beds of tractor trailers), while others are temporarily installed and removed as needed (e.g. to stack containers in storage yards).
Corner casting on a shipping container. The twistlock proper is inserted through a larger oval hole on the bottom.
Twistlock, unlocked position
Twistlock, locked position
Some twistlocks have a built-in lever
High-quality retractable twistlock
Close-up of twistlock on a rear corner of a container semi-trailer (Germany)
Rusty twistlock on a semi-trailer
Twistlocks on the deck of Majestic Maersk
Closeup of twistlock at Maritime Museum of Finland
Special types[further explanation needed] of twistlocks are also used in double-stack rail transport to secure the lower stack container with the upper one.
Twistlock engaged with shipping container at sea
Twistlocks on the base of a container ship. Foreground: unlocked; background: locked. The turnbuckles are 'lashing rods' used for additional stability
Containers can be joined vertically using these manually operated mid-locks.
These mid-locks are manually attached to the upper container, and then automatically lock to the lower container when stacked.
Twistlock attachment to a trailer (Japan)
Dockworker tosses a twistlock onto a shipping container
Dockworker installs a twistlock on a high stack of containers
Grounding of this container ship, the MV Rena off New Zealand on October 5, 2011, overstressed many twistlocks, resulting in a partial collapse of cargo stacks.
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