Remote Crane Sling Release Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current crane operation methods require skilled operators to manually release loads, often involving multiple attempts and safety risks, as they lack efficient and safe remote control mechanisms for disconnecting slings.
Innovation Solution
A remote control disconnecting device is attached to a crane's hook or hoisting cable, featuring sling ejector plates and a solenoid mechanism actuated by a radio frequency remote control, which securely locks and releases slings with an audible alarm for safety, ensuring timely release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual release method is used, then operator can release the load, but it requires high skill level and multiple attempts
Solution Approach 1:
The patent replaces the manual mechanical release operation with an automated solenoid-driven cam mechanism. The solenoid actuates the cam to rotate and disengage the locking pin from the locking wheel, enabling automatic sling release without requiring operator skill or multiple attempts.
Solution Approach 2:
The release mechanism is designed to automatically execute the release function when activated. The spring-loaded ejector plates and cam mechanism work together to self-propel the release action, eliminating the need for operator intervention and repeated attempts.
2Ease of operation
If remote control mechanism is added, then operator skill requirement is reduced, but device complexity increases
Solution Approach 1:
The patent introduces a radio frequency remote control as an intermediary between the operator and the release mechanism. The remote transmits signals to activate the solenoid, allowing the operator to release slings from a distance without direct manual manipulation of the complex mechanical components.
Solution Approach 2:
The complex manual manipulation tasks are replaced by an automated solenoid-cam mechanism that performs the release function mechanically. This substitution reduces the skill requirement while containing the added complexity within a dedicated automated subsystem.
3Ease of operation
If safety latch is not used, then release operation is simplified, but safety risk increases due to accidental drops
Solution Approach 1:
The locking pin and locking wheel mechanism provides preliminary secure locking of the sling before release. The spring-loaded ejector plates maintain constant pressure to ensure positive engagement, preventing accidental drops while maintaining operational simplicity.
Solution Approach 2:
The manual safety latch operation is replaced by an automated locking and release mechanism. The solenoid-driven cam system provides controlled engagement and disengagement, reducing the risk of human error while maintaining ease of operation.
4Reliability
If multiple release attempts are made, then release is achieved, but time consumption increases
Solution Approach 1:
The release mechanism is designed to execute the release function in a single automated action. The spring-loaded ejector plates and cam mechanism work together to self-propel the release, eliminating the need for multiple attempts and reducing time consumption.
Solution Approach 2:
The repeated manual manipulation required in traditional methods is replaced by a single-actuation solenoid-driven mechanism. The automated system performs the complete release sequence in one operation, significantly reducing the time required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables safe and efficient remote release of slings, reducing operator skill requirements and minimizing the risk of accidental drops by providing a reliable and timely mechanism for disconnecting loads.
Implementation Method 1
a remote control mechanism actuates a solenoid mechanism which pulls on a cam member
Implementation Method 2
pulls on a first traction spring as a sling ejector plate member rotates... pulls on a second traction spring member
Implementation Method 3
The solenoid is actuated remotely by a crane operator and works on radio frequency using an antenna and a signal receiver
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
An improved remote sling release for a crane has a main plate member including an access hole for attaching a main crane hoisting line therethrough, a hook portion located at an opposite end from the access hole and adapted to selectively hold securely or release sling members thereon. Two sling ejector plate members connected to one another such that the ejector plate members are pivotally attached to the main plate member, wherein each of the sling ejector plate member has a sling notch therein adapted to receive the sling members of a hoist pallet therein. A sling access handle member attached to at least one of the sling ejector plate members and used to manually rotate the ejector plate members from an open position for receiving the sling members therein and into a closed position, wherein the sling member are locked upon the hook portion of the main plate member. A remotely controlled solenoid mechanism attached to the main plate member and adapted to unlock the locking mechanism, and a first traction spring member adapted to bias the ejector plate members into the open position and force the sling members off of the hook portion. A remote control mechanism adapted to remotely activate the solenoid mechanism, to force the sling members off of the hook portion.