Internal Hoist Pickup Bar for Pre-Rigged Truss Mounting
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Solution Overview
Problem
Conventional truss mounting systems for stage lighting and overhead items do not allow for efficient pre-rigging of hoists, leading to increased on-site installation time and reduced truss height due to external hoist placement.
Innovation Solution
A truss end support system that allows mounting a hoist inside the truss, enabling pre-rigging and higher truss structure placement, with a hoist pick-up bar designed for concert touring applications, fabricated from aluminum and available in multiple sizes, which can be flipped for versatile attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional truss mounting systems are used with top-mounted hoists, then the hoist can be easily installed, but the truss structure height is limited and installation efficiency during load-ins and load-outs is reduced
Solution Approach 1:
The hoist is nested entirely within the truss footprint, with the pick-up bar mounting system integrating the hoist inside the truss structure. This nesting allows the truss to achieve greater height without the hoist extending beyond the truss outer extent, while pre-rigging the hoist inside the truss before site installation expedites load-in and load-out processes
Solution Approach 2:
The hoist is pre-rigged to the pick-up bar in the shop before site installation, allowing all preparation work to be completed prior to arrival at the venue. This preliminary action expedites on-site load-ins and load-outs, as the pre-assembled unit with machined aluminum pick-up bar and chain hoist can be quickly installed without现场 assembly
2Length of moving object
If the hoist is mounted outside the truss footprint, then installation is simpler, but the truss structure cannot be raised higher and space utilization is reduced
Solution Approach 1:
The entire hoist assembly is nested within the truss footprint, with the pick-up bar designed to mount the chain hoist inside the truss. This allows the truss structure to be raised higher than would be possible with external mounting, while the machined aluminum construction provides precise fit and simplified integration
Solution Approach 2:
The mounting system is segmented into distinct components: the pick-up bar, the chain hoist, and the mounting interface with the truss. This segmentation allows for standardized machined aluminum parts that can be precisely manufactured and easily assembled, reducing overall system complexity despite the internal mounting configuration
3Productivity
If pre-rigging of hoists is performed in the shop, then installation efficiency is improved, but additional preparation time and space are required before site arrival
Solution Approach 1:
The pick-up bar with machined aluminum construction is designed to facilitate pre-rigging of the chain hoist in the shop before site installation. This preliminary assembly of the pick-up bar and hoist unit allows all preparation to be completed beforehand, significantly expediting on-site load-ins and load-outs despite the initial shop preparation time required
Solution Approach 2:
The pick-up bar is available in three standard lengths (20.5-inch, 24-inch, and 30-inch) to match different truss sizes, allowing for standardized pre-rigging configurations. This standardization enables efficient shop preparation with repeatable assembly procedures, reducing the time and complexity of pre-rigging while maximizing on-site installation efficiency
Data Source
AI summary
A hoist pick up bar, which has its entire clamp system inside the footprint of the truss. A benefit of placing the hoist inside the truss allows designers to raise the truss structure itself higher since the hoist is no longer above it. In embodiments, the device has clamps that move out of the way so that the device can be lowered on to the truss.