Heavy machine having man cage for high place work and detection system of fall prevention measure in man cage for high place work

The heavy machinery system with air-powered contact sensors addresses the challenge of preventing gunpowder explosions and ensuring safety compliance during high-altitude work by eliminating electrical wiring and reliably detecting safety belt usage and mancage door closures.

JP2025037352APending Publication Date: 2025-03-18TAISEI CORP +1
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Patent Information

Application Number
JP2023144228
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-06
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

Existing high-altitude work machinery and fall prevention systems face challenges in preventing accidental gunpowder explosions due to electrical wiring leakage and compliance with safety regulations, while also ensuring reliable detection of mancage door openings and safety belt usage.

Method used

A heavy machinery system with a mancage for high-altitude work that employs contact sensors using compressed air or pressure oil to detect safety belt usage and mancage door closures, eliminating the need for electrical wiring near the mancage and thus preventing potential gunpowder explosions.

Benefits of technology

The system effectively prevents accidental gunpowder explosions by avoiding electrical wiring and ensures reliable detection of safety belt usage and mancage door closures, thereby enhancing safety compliance and worker protection during high-altitude operations.

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Abstract

To provide a heavy machine having a man cage for high place work which eliminates risks of miss-explosion of a powder by providing no electric wiring at least in a periphery of the man cage and can detect opening / closing of a swing door of the man cage and a used or unused state of a safety belt in compliance with regulations, and to provide a detection system of a fall prevention measure in the man case for high place work.SOLUTION: A heavy machine 90 has: a movable dolly 10; a man cage boom 15 rotatably attached to the movable dolly 10; and a man cage 20 attached to a tip of the man cage boom 15. The man cage 20 includes: a working floor 21; and a guard fence 23 which is provided on the upper side of the working floor 21 and includes a swing door 25. The guard fence 23 is attached with contact type sensors 30A, 30B using compressed air or pressure oil. The contact type sensors 30A, 30B detect a hook F of a safety belt hooking on a part of the guard fence 23 and / or the swing door 25 being closed.SELECTED DRAWING: Figure 1
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