Padlock Retaining Device for Roll-Up Door Frame

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Solution Overview

Problem

Roll-up doors often suffer damage when opened with a padlock still attached to the manager's overlock hole, as the padlock strikes the door frame, causing damage to the frame and latch assembly due to the door's weight and momentum.

Innovation Solution

A standalone padlock retaining device with a body and lock containment section is attached to a wall adjacent to the roll-up door, featuring body attachment facilitators and a lock containment section to securely hold the padlock shackle, preventing it from being carried upwards with the door.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the padlock is stored in the manager's overlock hole for convenience, then the user has a convenient place to store the padlock when not in use, but the padlock will be carried upwards with the door and strike the door frame causing damage

Engineering Contradiction:

Improveconvenience of padlock storageVSAvoiddamage to door frame and latch assembly

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the harmful function (padlock storage during door operation) from the locking mechanism by providing a separate dedicated storage location on the door frame. The padlock can be removed from the locking apparatus and stored in the designated recess or holder on the door frame, separating the storage function from the locking function to prevent the padlock from being carried upward with the door.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention introduces an intermediary structure (recess or holder on the door frame) that serves as a designated storage location for the padlock. This intermediary component captures and retains the padlock in a fixed position on the door frame, preventing it from moving with the door during operation while providing convenient access for users.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the padlock retains a fixed position on the door frame, then the padlock is prevented from striking the door frame, but the device complexity increases with additional components

Engineering Contradiction:

Improveprevention of padlock striking door frameVSAvoidadditional components on door frame

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention segments the door frame structure by adding a separate, dedicated recess or holder component specifically for padlock storage. This segmentation allows the padlock storage function to be independent from the main locking mechanism, enabling the padlock to be stored in a fixed position without integrating complex mechanisms into the existing locking apparatus.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention allows the padlock to be discarded from the locking apparatus after use and recovered in a designated storage location on the door frame. This approach simplifies the system by allowing the padlock to be removed and stored separately rather than requiring integrated retention mechanisms, reducing overall device complexity while maintaining safety.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS10184273B2Padlock retaining device

Publication Date: 2019.01.22 PICKARD MARK A

AI summary

A padlock retaining device having: a) a stand-alone body, separate from any locking device or latching device, the body having one or more body attachment facilitators and b) a lock containment section attached to and extending away from the body for accepting and retaining an open padlock.