Gasket Mounting Structure With Orientation-Locking Jig
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Solution Overview
Problem
Conventional gasket mounting structures fail to prevent incorrect orientation during installation, leading to potential sealing failures and increased costs due to required preventive measures like painting and checking.
Innovation Solution
A gasket mounting structure featuring a jig with specific diametered surface portions that interact with the gasket's inner peripheral surfaces to ensure correct orientation, preventing wrong-direction mounting by using stepped surfaces to either hold or prevent contact with the gasket's seal projection, thus eliminating the need for additional preventive measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preventive measures like painting and checking are applied to prevent wrong mounting direction, then the reliability of sealing is improved, but the manufacturing cost and process complexity increase
Solution Approach 1:
The patent applies asymmetry by creating a jig with non-symmetric diameter portions (large-diameter and small-diameter portions) that correspond to the asymmetric structure of the gasket's inner peripheral surface. This asymmetric design allows the jig to fit only in the correct orientation, preventing wrong-direction mounting without requiring additional preventive measures like painting or checking.
Solution Approach 2:
The patent introduces a mounting jig as an intermediary tool between the operator and the gasket. This jig acts as a mediator that enforces correct mounting orientation through its physical structure, eliminating the need for secondary checking processes and reducing overall process complexity while maintaining reliability.
2Ease of operation
If a jig with multiple diameter portions is used to prevent wrong mounting, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The jig incorporates asymmetric diameter portions (large-diameter and small-diameter sections) that create a unique fit with the corresponding asymmetric outer peripheral surfaces of the gasket. This asymmetric design simplifies operation by providing tactile and visual guidance for correct orientation, while the complexity is confined to the jig structure itself rather than the overall mounting process.
3Ease of manufacture
If the gasket is mounted without preventive measures, then the manufacturing cost is reduced, but the risk of wrong mounting and subsequent rusting increases
Solution Approach 1:
The patent implements preliminary action by designing the jig with specific diameter portions that enforce correct gasket orientation during the mounting process itself. This preventive mechanism is built into the mounting operation, eliminating the need for post-mounting checks or additional protective measures, thereby reducing manufacturing costs while maintaining reliability.
Data Source
AI summary
Provided is a gasket mounting structure capable of preventing a gasket from being mounted in a wrong direction. The gasket mounting structure is configured such that, when a jig 200 is inserted into a gasket 100 from a large-diameter inner peripheral surface portion 124 side, a small-diameter outer peripheral surface portion 210 is press-fitted into an inner peripheral surface of a seal projection 122 to result in a state in which the gasket 100 is held by the jig 200 and, when the jig 200 is inserted into the gasket 100 from a small-diameter inner peripheral surface portion 123 side, the small-diameter outer peripheral surface portion 210 does not reach a position at which the small-diameter outer peripheral surface portion 210 can come into contact with the seal projection 122.