Products/Services for ISO Container Dimensions Twist Locks Locks and Locking Systems - (514 companies) Description Locks and locking systems are used to secure doors, cabinets, and other points of entry. Delta Mark offers many shipping container locking pins. Our replacement iso container twist locks and pins to ensure that your containers stay securely rigged when being transported. Our inventory of container securing products is sure to have what you are looking for. Weldable shipping container twist locks are approximately 175mm x 140mm x 135mm in size. They are designed to connect a shipping container to another structure either by welding the shipping container twist lock directly to the new structure or by installing slipper shoes to allow the twist lock to be mechanically connected to the new structure. Single Standard Twistlocks. • Multi-Stroke Screw Down Twistlock for UK application is fitted with a third lock to meet vehicle standards. Quality Assurance and ISO 9001. The Multi-Stoke Twistlock design and engineering has been established for over 30 years, with Multi-Stroke owning the intellectual property for this design.
ISO 15170-1:2001 Preview Road vehicles -- Four-pole electrical connectors with pins and twist lock -- Part 1: Dimensions and classes of application This standard was last reviewed and confirmed in 2018.
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.
Description[edit]
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.
Mechanism[edit]
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
Applications[edit]
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.
References[edit]
| Wikimedia Commons has media related to Twistlocks. |
- ^'The Lives They Lived'. The New York Times. 22 December 2011.
- ^Johna Till Johnson (September 29, 2011). 'The Engineer Who Transformed Shipping'. Wind Against Current.
- ^A Master's Guide to Container Securing, Lloyd's Register, London
- Peck and Hale (2000). 'Container Stowage and Securing Systems'(PDF). West Sayville, NY: Peck & Hale. Archived from the original(PDF) on 2011-07-15. Retrieved 2011-03-01.
- Levinson, Marc (2006). The Box: How the Shipping Container Made the World Smaller and the World Economy Bigger. Princeton, N.J: Princeton University Press. ISBN0-691-12324-1.
- Nichols, C. Reid; Williams, Robert G. (November 2008). Encyclopedia of Marine Science. Infobase Publishing. p. 119. ISBN978-0-8160-5022-2. Retrieved 8 March 2011.
- SPTA-company (November 2008). SPTA.su. Infobase Publishing. p. 119. ISBN978-0-8160-5022-2. Retrieved 8 March 2011.