V-Groove Guide for Industrial Curtain Stability
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Solution Overview
Problem
Quick closing 'fold up' devices for industrial use experience issues with curtain edges wear and inadequate air tightness due to constant groove width, leading to transverse movement and air leakage.
Innovation Solution
The groove of each upright is designed with a V-shaped bottom wall and tapered shape, with linear brush sealing members and flexible flaps to ensure the curtain remains in a fixed vertical plane, reducing clearance and enhancing air tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the groove width is constant throughout the upright, then the structure is simple to manufacture, but the curtain can move transversely and oscillate within the gap, leading to edge wear and poor air tightness
Solution Approach 1:
The groove width varies along its length, being narrower at the top and wider at the bottom. This local variation in geometry provides different functional characteristics at different positions: the narrow top portion prevents transverse movement and oscillation of the curtain, while the wider bottom portion allows proper installation and accommodation of the curtain in its lowered position.
2Adaptability or versatility
If the groove width is increased to accommodate loops in raised configuration, then the curtain can be fully raised, but the clearance increases allowing transverse movement and oscillation
Solution Approach 1:
The groove is designed with different widths at different heights to simultaneously satisfy two requirements: the upper narrow portion constrains the curtain to prevent oscillation and maintain stability, while the overall groove geometry accommodates the loops formed when the curtain is raised, enabling full raising capability.
3Area of stationary object
If the upright section near ground is narrow, then more space is available for machine and people operation, but the groove must be wider at the bottom to accommodate this constraint
Solution Approach 1:
The groove geometry is tailored to be wider at the bottom and narrower at the top, which allows the upright structure to have a narrower overall profile near the ground, thereby maximizing operational space while the varied groove dimensions accommodate the curtain in both raised and lowered positions.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A quick closing fold up device comprises a flexible curtain (20) movable between a lowered configuration and a raised configuration, or vice-versa, with respect to a portal structure (12) including a pair of parallel uprights (16) and an upper cross member (18) for connecting said uprights (16). The uprights (16) define respective grooves (32) for the engagement of the opposite side edges of the curtain (20) and of the opposite ends of transverse stiffening members (24) associated with the curtain (20), the width of said grooves in the portion adjacent to the upper cross member (18) is such as to allow a series of loops (22a) of the curtain (20), which are formed as a result of raising the curtain (20), wherein the groove (32) of each upright (16) has a substantially V-shaped bottom wall (34), the vertex (38) of which constitutes a rectilinear seat for sliding the opposite ends of the transverse stiffening elements (24).