Moving stands
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Solution Overview
Problem
Conventional retractable moving stands transmit rocking motion from step-like passages to seat sections, causing instability for individuals sitting on chairs.
Innovation Solution
The moving stand features independent seat and passage floor members supported by separate arm members and beam members, which absorb and dissipate the rocking motion, preventing its transmission to the seat section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the seat floor member and passage floor member are integrally connected, then the structure is simplified and easier to manufacture, but the rocking motion from the passage is directly transmitted to the seat section causing instability
Solution Approach 1:
The floor member is divided into a seat floor member and a passage floor member that are independently supported. The seat floor member is supported by seat arm members connected to the beam member, while the passage floor member is supported by passage arm members connected to the columns. This segmentation prevents rocking motion from the passage from being transmitted to the seat section, resolving the stability issue while maintaining manufacturing simplicity through modular construction.
2Ease of manufacture
If all arm members are directly connected to the beam member without columns, then assembly is facilitated and parts can be shared across tiers, but the passage floor member lacks independent support structure
Solution Approach 1:
The arm members are segmented into seat arm members connected to the beam member and passage arm members connected to the columns. This allows the passage floor member to have independent support through the column connection while the seat floor member maintains its connection to the beam member. The segmentation enables both floor members to be supported independently, providing the necessary structural versatility.
Solution Approach 2:
The columns serve multiple functions: they support the passage arm members for the passage floor member, provide structural reinforcement, and enable the passage section to be independently supported. This multi-functionality allows the same column structure to serve both support and stabilization purposes without adding separate components.
Data Source
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AI summary
Disclosed is a retractable moving stand wherein the sense of stability of the sitting persons is enhanced by making it possible for the sitting persons not to feel rocking even if a spectator walks on a step-like passage up and down. A retractable moving stand comprising a plurality of tiers of floor bases (1) each including a floor member ( 6) supported by a beam member (4) through an arm member (5), leg portions (2) supporting each floor base (1) through columns (7) to be movable in a horizontal state, and a plurality of chairs (3) attached to each floor base (1), the plurality of tiers of floor bases (1) being capable of moving in the horizontal state between an advance position where the floor bases are shifted stepwise from each other and a retracting position where the floor bases are aligned with each other in a vertical direction, and the floor members (6) of the plurality of tiers of floor bases (7.) form a step like passage at the advance position, characterized in that each floor base (1) includes seat arm members (5A) and passage arm members (5B) as the arm member (5), and includes seat floor members (6A) and passage floor members (6B) independent of each other as the floor member (6), the seat floor member (6A) is supported on at least one of the beam member (4) and the columns (7) by the seat arm members (5A), and the passage floor member (6B) is supported on at least one of the beam member (4) or the columns (7) by the passage arm members (5B).