Climbing Belay With Rotatable Lever For Automatic Fall Arrest
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Solution Overview
Problem
Existing belay devices require operator intervention for fall arrest, leading to potential accidents if the operator is inexperienced or distracted, and they do not automatically ensure safe fall arrest without manual operation.
Innovation Solution
A climbing belay device with rotatable elements and a lever mechanism that automatically locks the rope during a fall, allowing secure fall arrest without manual intervention, and can be used by users of varying experience levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If semi-locking belay devices are used to generate friction and dissipate fall energy, then the stopping force is reduced and the arrest is softer, but operator intervention is required and accidents can occur if the operator is inexperienced or distracted
Solution Approach 1:
The belay device automatically activates the braking function when fall tension is detected, without requiring operator intervention. The rotatable element rotates under fall tension to engage the braking surface, and the lever mechanism automatically positions itself to create friction between rope segments, enabling the device to self-regulate fall arrest
Solution Approach 2:
The lever is pre-positioned in a retracted state during normal climbing operations. When fall tension occurs, the lever automatically moves to an extended position that activates the braking mechanism, preparing the safety system in advance before the fall actually occurs
2Reliability
If locking belay devices are used to immediately lock the rope, then fall arrest is immediate and reliable, but the deceleration is very violent and can cause injuries
Solution Approach 1:
Instead of immediately locking the rope with full braking force, the device initially allows partial rope sliding to generate controlled friction. The lever mechanism creates a gradual braking action that dissipates fall energy over a longer distance, reducing peak deceleration forces on the climber while still achieving reliable fall arrest
Solution Approach 2:
The braking force is dynamically adjusted based on fall tension. The rotatable element and lever mechanism allow the device to transition from a free-state during normal climbing to an active braking state during falls, with the friction between rope segments being modulated by the lever's position and the tension force
3Device complexity
If semi-locking brakes require operator grip and manual operation, then the device structure can be simpler, but the ease of operation decreases and experience is required for correct use
Solution Approach 1:
The device automatically detects fall conditions through rope tension and activates the braking mechanism without requiring operator grip or manual operation. The lever and rotatable element self-actuate based on the physical state of the rope, making the device easy to operate for users of any experience level
Solution Approach 2:
The device uses rope tension as feedback to automatically activate or deactivate the braking function. When tension exceeds a threshold indicating a fall, the lever extends and braking engages; when tension returns to normal, the lever retracts and braking disengages, creating an automatic feedback-controlled safety system
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 provides automatic and reliable fall arrest, minimizing injury risk to climbers and belayers, and allows for easy operation, even by inexperienced users, while also enabling simultaneous use with multiple ropes and abseiling.
Implementation Method 1
the rope segments (40c, 40e) abutting each other with generation of friction, which automatically locks the rope (40)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A climbing belay device (10) is described comprising: a main body (12) having a first surface (12a) and defining a through opening (14); a first rotation pivot (18) attached transversely to the first surface (12a) and defining a first rotation axis (20); a first locking pivot (26) transverse to the first surface (12a) and having a first end (26a), attached to the first surface (12a); and a first rotatable plate (16) facing the first surface (12a), has a first (16a), a second (16b) and a third (16c) end, is coupled, at the first end (16a), to the main body (12) via the first rotation pivot (18), is rotatable about the first rotation axis (20) and is positionable in a first position or in a second position angularly rotated with respect to the first position around the first rotation axis (20). The second end (16b) of the first rotatable plate (16) defines a first eyelet (22). The through opening (14), the first rotation pivot (18) and the first locking pivot (26) are misaligned with each other.