Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and apparatus for detecting crack formation in lifting members and lifting frame

A technology for lifting frames and components, which is applied in the measurement, measurement of force, and tension measurement of the change force of the optical properties of the material when it is stressed, and can solve the problems of container falling off, too frequent, twist lock damage, etc., to achieve and The effect of compact equipment and reliable equipment

Inactive Publication Date: 2016-01-20
STINIS BEHEER
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Twistlocks can eventually fail due to crack formation, whereby the remaining twistlocks are loaded more heavily, which itself can also lead to crack formation and damage
Because damage to one or more twistlocks could cause the container to fall off the spreader, which can have catastrophic consequences, it is practice to replace the twistlocks frequently before the risk of crack formation becomes too great
Since a safety margin is usually provided here, the twistlocks are generally replaced too early and too often, so that the spreader is often unnecessarily inoperative

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for detecting crack formation in lifting members and lifting frame
  • Method and apparatus for detecting crack formation in lifting members and lifting frame
  • Method and apparatus for detecting crack formation in lifting members and lifting frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] A lifting frame or spreader 1 for transporting a container 2 is suspended from a container crane by means of a cable 5 pulled around a pulley 4 . The lifting frame 1 includes a central beam 6 , two extendable middle beams 7 and two extendable outer beams 8 . Each outer beam 8 supports a cross beam 9 defining two corner points 12 . Lifting members or twist locks 11 engaging in openings 20 in corner castings 21 of the container 2 are provided at these corner points 12 of the lifting frame 1 . A pivotable guide member or flipper 13 is also provided at the corner point 12 .

[0029] Each lifting member 11 is substantially T-shaped and has a shaft 14 and a hammer head 15 . Two grooves and thus two collars or shoulders 16, 17 are formed on the upper side of the shaft 14, so that the lifting member 11 is suspended on a shoulder which also has two grooves and two collars 18, 19. ring support element. These two collars form redundant paths for forces as described in EP138577...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a method for detecting crack formation in a lifting member, comprising the steps of measuring the stress under load at two points of the lifting member, comparing the measured stresses, and when the measured stresses differ too much from each other A warning signal is generated frequently. The invention also relates to a device for detecting crack formation in a lifting member, comprising: means arranged at two points of the lifting member for measuring the stress under load; connected to the measuring means for comparing the measured means for stress; and means connected to the comparison means for generating a warning signal when the measured stresses differ too much from each other. Finally, the invention relates to a lifting frame comprising: a plurality of lifting members mounted on the lifting frame close to the corners of the lifting frame; and a crack detection device connected to the lifting members.

Description

technical field [0001] The present invention relates to a method for detecting crack formation in lifting members such as like twistlocks. Such twist locks are used on a large scale for attaching containers. Background technique [0002] A container is usually provided at its eight corner points with so-called corner castings in which are formed openings adapted to form the heads of the twistlocks. When a container has to be transferred from a ship to a quay or vice versa, eg by means of a crane, a lifting frame (so-called spreader) suspended from the crane by means of hoisting ropes is lowered to a position directly above the container. The spreader is provided with twistlocks at its four corners which are then set into the corner castings by carefully manipulating the spreader and then turning the twistlocks a quarter turn so that the head of each twistlock Locked into corner castings. Then the spreader and the container on it are hoisted by the traction of the hoisting...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01L5/10G01M11/08G01M5/00G01L1/24
CPCG01L1/246G01L5/101G01L5/105G01M5/0041G01M11/086G01L5/10G01M5/00G01L1/24G01M11/08G08B21/182
Inventor 科内利斯·斯蒂尼斯
Owner STINIS BEHEER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com