Lockout Tagout Padlock With Hinge Pocket For Multi-Worker Safety
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Solution Overview
Problem
Existing lockout/tag out systems often fail to ensure that hazardous energy sources are adequately controlled during maintenance, as they typically accommodate only a single padlock, leaving workers exposed to risks of unexpected energization or startup due to incomplete shutdown procedures.
Innovation Solution
A lockout/tag out apparatus that uses multiple padlocks and hinge parts to form a secure padlock pocket, requiring multiple individuals to authorize the unlocking of a hazardous energy source control box, thereby ensuring that all padlocks are removed before the system can be re-energized, with warning tags identifying the key holders for accountability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single padlock is used to secure the control box, then the device complexity is low and ease of operation is high, but the reliability of energy isolation is insufficient when multiple workers are present
Solution Approach 1:
The lockout system is segmented into multiple independent padlocks (at least two) that must all be removed to restore energy flow. Each padlock represents an independent safety authorization from a different worker, ensuring that no single individual can inadvertently or maliciously re-energize the system while others are still working.
Solution Approach 2:
The patent implements a nested configuration where padlocks are arranged in sequence along the energy flow path, with each subsequent padlock dependent on the removal of previous ones. The hasp mechanism nests multiple locking points within a single control box structure, creating a hierarchical security system where inner padlocks cannot be accessed until outer padlocks are removed.
2Reliability
If multiple padlocks are accommodated in the control box, then the reliability of group authorization is improved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The hasp mechanism serves multiple functions: it provides structured mounting for multiple padlocks, guides padlock shackles into proper engagement positions, and visually indicates the lockout status. This universal component handles both the mechanical locking function and the procedural coordination function, simplifying the overall operation despite multiple padlocks.
Solution Approach 2:
The hasp acts as an intermediary device between the control box and multiple padlocks. It mediates the interaction by providing a common interface that all padlocks engage with, coordinating their functions without requiring direct complex interconnections between each padlock. This intermediary simplifies the user interface while maintaining multiple authorization points.
3Adaptability or versatility
If a single aperture or staple is provided in the control box, then the device complexity is low, but the adaptability to accommodate multiple padlocks is limited
Solution Approach 1:
The patent transitions from a single-point locking interface (one aperture or staple) to a distributed multi-point interface along the energy flow path. By adding padlocks at different positions and orientations (different dimensions) within the control box, the system accommodates multiple authorization requirements without requiring a completely redesigned control box structure.
Solution Approach 2:
The lockout system is designed to be dynamically configurable, allowing the control box to adapt to different numbers of workers and maintenance scenarios. The hasp mechanism can accommodate varying numbers of padlocks based on the actual work requirements, providing flexibility without permanent structural modifications to the control box.
Data Source
AI summary
A lockout padlock controls access to a hazardous energy source control box. The control box has a box body and a door that closes the box body. The door has an aperture. A staple is connected to the box body and the staple extends through the aperture in the door of the control box. A first lockout hinge part has a first lockout hinge part padlock hole. A second lockout hinge part has a second lockout hinge part padlock hole. The first lockout hinge part and the second lockout hinge part are position together to form a padlock pocket. A first padlock is positioned and locked in the staple. The first padlock is positioned in said padlock pocket and covered by said first lockout hinge part and said second lockout hinge part. A second padlock is positioned in the first lockout hinge part padlock hole and in said second lockout hinge part padlock hole.