Rope Deflection Roller Securing Member for Incorrect Reeving Detection
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Solution Overview
Problem
Existing deflection devices for ropes, such as those used in working machines, often result in incorrect reeving where the rope is guided outside the rope protection bar, leading to potential damage to the rope and other materials.
Innovation Solution
A deflection device with a rotatable deflection roller and a movable rope securing member that can displace along a defined path, equipped with a detection system to alert personnel of incorrect reeving, ensuring the rope is correctly guided and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed rope securing member is used, then the structure is simple, but incorrect reeving cannot be detected
Solution Approach 1:
The rope securing member is made movable instead of fixed, allowing it to change position in response to incorrect reeving attempts. The member can move between a first position (preventing incorrect reeving) and a second position (allowing correct reeving), enabling the system to detect and respond to reeving errors dynamically.
Solution Approach 2:
A detection device monitors the position of the movable rope securing member and provides feedback about reeving correctness. When the member moves to indicate incorrect reeving, the detection device generates a signal to alert operators, creating a closed-loop feedback system that improves reliability.
2Reliability
If a movable rope securing member with detection device is used, then incorrect reeving can be detected, but the device complexity increases
Solution Approach 1:
The movable rope securing member serves dual functions: it physically prevents incorrect reeving by blocking the rope path and simultaneously acts as a detection element whose position change triggers the alarm. This self-service approach reduces the need for separate complex detection mechanisms.
3Reliability
If the rope securing member is placed close to the deflection roller, then rope security is improved, but the risk of incorrect reeving damage increases
Solution Approach 1:
The rope securing member's position is dynamically adjusted based on reeving correctness. In the first position, it is placed to prevent incorrect reeving; in the second position, it allows correct reeving to proceed without interference, thus maintaining rope security while eliminating damage risks.
Data Source
AI summary
The disclosure relates to a deflection device for deflecting a rope, comprising a roller holder, at least one deflection roller mounted on the roller holder so as to be rotatable about a roller axis of rotation, and a rope securing member spaced radially from the deflection roller for securing the rope to the deflection roller. According to the disclosure, the rope securing member is mounted so that it can be displaced along a displacement direction, wherein the deflection device comprises a detection device by means of which a displacement of the rope securing member along the displacement direction can be detected. The disclosure also relates to a working machine, in particular a crane, comprising a deflection device according to the disclosure, wherein the working machine comprises a boom with a boom head which comprises at least one deflection device over which a rope is guided.