Cable Length Adjuster for Gantry Rotation Stability
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Solution Overview
Problem
The existing particle beam treatment apparatus with a gantry faces instability in rotating operations due to cable tangling and breakage caused by varying cable lengths as the gantry rotates, leading to potential disruptions in the treatment process.
Innovation Solution
The apparatus incorporates cable-length adjusters and a moving floor with flexible, annularly joined plates that adjust cable lengths to maintain optimal tension and prevent slackness, ensuring stable rotation by accommodating cable length changes as the gantry rotates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cables are caused to rotate in conjunction with the rotation of the gantry, then the device can be operated in different positions, but the cable may become tangled or broken due to varying cable length requirements
Solution Approach 1:
The cable length adjuster dynamically adjusts the effective cable length based on the gantry's rotational position. As the gantry rotates and the distance between the device and through-hole changes, the adjuster modifies the cable length in real-time to maintain optimal tension and prevent tangling or breakage, thereby resolving the contradiction between operational flexibility and cable stability.
Solution Approach 2:
The system changes the physical parameter of cable length according to the gantry's rotational angle. By varying the cable length parameter to match the changing spatial relationship between the device and through-hole, the system maintains reliable cable operation across all rotational positions while preserving adaptability.
2Ease of operation
If the moving floor is designed with a D-shaped cross-section to maintain horizontal floor surface during rotation, then workability and patient comfort are improved, but the distance between device and through-hole varies with rotation angle causing cable issues
Solution Approach 1:
The cable length adjuster provides dynamic compensation for the geometric constraints of the D-shaped moving floor. As the gantry rotates and the device position relative to the through-hole changes, the adjuster dynamically modifies cable length to maintain stable cable operation, allowing the D-shaped floor design to be maintained for ergonomic benefits without compromising cable reliability.
3Device complexity
If fixed cable length is used to simplify the system, then device complexity is reduced, but the gantry rotation stability is compromised due to cable slackness or excessive tension
Solution Approach 1:
Rather than using a fixed cable length that would require oversizing to accommodate all rotational positions (causing slackness and instability), the system employs a dynamic adjustment mechanism that optimizes cable length for each rotational position. This resolves the contradiction by maintaining rotation stability without excessive complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
A particle beam treatment apparatus includes: a gantry configured to axially rotate in a state where an irradiation port for a beam is fixed to a body of the rotating gantry; a moving floor that is provided inside the gantry, is configured by annually connecting a plurality of plates with each other in a freely bendable manner, accommodates at least a part of a bed fixed from a stationary system, and rotates together with the gantry in a state of causing the irradiation port to penetrate the moving floor; a cable configured to be connected to a device fixed to the moving floor and be wired to outside of the gantry in a state of passing through the gantry; and an adjuster configured to adjust length of the cable wired inside the gantry when the gantry axially rotates.