Fastening device for a seat fitting or lid fitting on a sanitary object, and sanitary arrangement comprising a sanitary object and a seat fitting or lid fitting
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Solution Overview
Problem
The existing fastening devices for seat or lid fittings on sanitary objects require complex on-site alignment and positioning, leading to high effort and potential handling difficulties due to protruding rod ends, which can cause injuries and packaging issues.
Innovation Solution
A two-piece fastening device comprising a threaded rod and a retaining pin, where the threaded rod is pre-mounted with abutment elements in the factory, ensuring optimal alignment and positioning, and the retaining pin is screwed in only during final assembly, eliminating the need for on-site alignment and reducing protrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the threaded rod is pre-mounted in the factory with protruding rod ends, then the alignment and positioning are optimal, but the packaging and handling become difficult and injury risks increase
Solution Approach 1:
The fastening device is divided into two functional parts: a threaded rod for pre-mounting and alignment, and a retaining pin for final assembly. This segmentation allows the threaded rod to be mounted in the factory for precise alignment while the retaining pin is only inserted later, eliminating the hazard of protruding rod ends during handling and packaging.
Solution Approach 2:
The threaded rod is pre-mounted in the factory to establish accurate alignment and positioning before the sanitary object is packaged. This preliminary action ensures manufacturing precision is achieved while avoiding the need to have protruding rod ends during transport and installation, as the retaining pin is only inserted at the final assembly stage.
2Ease of operation
If the fastening devices are mounted in situ, then the handling and packaging are easier, but the alignment and positioning require high effort and time
Solution Approach 1:
The threaded rod is pre-mounted in the factory with accurate alignment and positioning, eliminating the need for time-consuming alignment work at the installation site. The fitter only needs to insert the retaining pin and attach the seat fitting, significantly reducing on-site installation time and effort.
Solution Approach 2:
By separating the fastening device into a pre-mounted threaded rod and a separately inserted retaining pin, the complex alignment task is completed in the factory where proper tools and fixtures are available, while the on-site task is reduced to simple insertion and attachment operations.
3Manufacturing precision
If the threaded rod protrudes from the ceramic upper face, then the alignment is accurate, but the protruding ends cause handling difficulties and injury risks
Solution Approach 1:
The fastening system is segmented into a threaded rod that remains recessed or flush with the ceramic surface for safe handling, and a retaining pin that is inserted later to provide the necessary protrusion for attaching the seat fitting. This eliminates the hazard of permanently protruding rod ends while maintaining alignment accuracy.
Solution Approach 2:
The threaded rod is pre-mounted with accurate alignment but kept recessed or flush with the ceramic surface. The retaining pin is inserted only when needed for final assembly, providing the necessary protrusion temporarily for attachment purposes, then can be removed or left flush, eliminating permanent handling hazards.
Data Source
AI summary
A fastening device for a seat fitting or lid fitting on a sanitary object, comprising a threaded rod which has an external threaded portion and an internal threaded bore and which engages through a through-hole in the sanitary object in the mounted position, a first and a second abutment element which in the mounted position receive a portion of the sanitary object between one another and are braced thereagainst, at least one nut to be screwed onto the external threaded portion for bracing the abutment elements and the threaded rod, and a retaining pin which receives the seat fitting or lid fitting and which has an external threaded portion to be screwed into the internal threaded bore.