Elevator Anchor Recessed in Concrete Slab
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Solution Overview
Problem
Conventional elevator assembly anchors require significant space in the shaft head area to achieve load-bearing capacities of several tons, limiting their usability in areas with limited ceiling thickness and restricting the use of space for the elevator.
Innovation Solution
An elevator assembly anchor with an attachment section housed in a recess body that is poured into the concrete slab, allowing the anchor to be flush with the ceiling and using a rod or metal plate for anchoring, which extends into the concrete for load distribution, enabling loads of several tons to be carried without protruding into the shaft head area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional corrugated anchor is used to achieve load capacities of up to 4 tons, then the load-bearing capacity is improved, but the anchor protrudes up to 25 cm into the shaft head area and requires a ceiling thickness of at least 30 cm
Solution Approach 1:
The attachment section is nested within a recess body that is cast into the concrete ceiling, similar to how a nested doll places one object inside another. This allows the anchor mechanism to be contained within the ceiling thickness rather than protruding into the shaft head area, resolving the space occupation problem while maintaining load-bearing capacity through the embedded anchoring sections.
Solution Approach 2:
The invention transitions from a primarily vertical anchor configuration to a horizontal embedding approach within the ceiling plane. By creating recesses in the ceiling and embedding anchoring sections horizontally within the concrete, the solution moves the anchor's functional volume from the vertical shaft head space into the horizontal ceiling dimension, effectively resolving the space conflict.
2Strength
If the attachment section extends up to 25 cm into the shaft, then the load capacity is achieved, but the space available for the elevator is reduced
Solution Approach 1:
The attachment section is extracted from the shaft head area and relocated into the ceiling structure. By removing the protruding attachment section from the shaft space and repositioning it within the recess body embedded in the ceiling, the solution eliminates the space occupation conflict while preserving the load-bearing function through the anchoring sections remaining in the concrete.
3Volume of moving object
If a smaller version of the anchor is used for thinner ceilings, then the space requirement is reduced, but the load-bearing capacity is limited to lower loads
Solution Approach 1:
The anchor is segmented into distinct functional components: anchoring sections for embedding in concrete, a suspension section for structural connection, and an attachment section for connecting loads. This segmentation allows each component to be optimized independently, enabling the design to achieve high load-bearing capacity in thinner ceilings by distributing functions across multiple specialized sections rather than relying on a single large protruding structure.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The anchor has a suspending section (6a) for suspending shackle, hook or ropes, and an anchoring section molded into a concrete floor (3). The suspending section is arranged in a recess unit (2) that is provided adjacent to a lower casing (4) for molding into the concrete floor and generates a hollow space (1) adjacent to a lower side of a cover, where the hollow space is enclosed in the floor after removing the suspending section. The recess unit is made of foamed plastic and has a length of 15 to 20 centimeter. The recess unit comprises a wall made of metal or plastic.