Fly Screen Lateral Winding Mesh Guide Brushes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fly screens with lateral winding fail to prevent the mesh from escaping the lower and upper guides, allowing small animals and wind to pass through, and suffer from misalignment issues during installation.
Innovation Solution
The fly screen design incorporates brushes within the sliding channels of the lower and upper guides to lock the mesh in place, preventing escape and ensuring proper alignment, with a slider and winding tube mechanism that allows for secure mesh retention and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mesh is allowed to slide freely in the tracks, then the fly screen can open and close easily, but the mesh can escape from the tracks due to wind or animal intrusion
Solution Approach 1:
Brushes are pre-installed on the lateral surfaces of the tracks at inclined angles before the mesh is installed. These brushes are positioned to contact the mesh ends only when the mesh attempts to escape, allowing normal operation while preventing harmful displacement
Solution Approach 2:
Brushes serve as an intermediary element between the mesh and the track walls. The brushes contact the mesh ends at an inclined angle, providing a mediating force that guides the mesh back into proper alignment without blocking normal sliding motion
2Ease of operation
If space is left between the tracks for the mesh to slide, then the mesh can move freely, but small animals can pass through the gaps
Solution Approach 1:
The tracks have different properties at different locations: the main sliding channel remains open for mesh movement, while the lateral surfaces have brushes installed at specific angles to prevent animal intrusion. This local differentiation allows both free sliding and gap prevention
3Reliability
If floor-mounted guides are used to guide the mesh, then the mesh is contained, but the guide obstructs the passage of carriages with wheels
Solution Approach 1:
The guiding function is extracted from the floor-mounted guide and transferred to the lateral box and track system mounted on the window frame. This removes the obstruction from the floor level while maintaining mesh containment through the lateral tracking system
Data Source
Figure 1
Figure 2a~2c
Figure 3
AI summary
Described is a fly screen (1) with lateral winding for doors or windows comprising a lower guide (2) and an upper guide (3), a plurality of lower tracks (8) and a plurality of upper tracks (13) which are designed to be positioned respectively in the lower guide (2) and in the upper guide (3) in a closed configuration of the fly screen (1). The fly screen (1) comprises a slider (4) which is slidable along the lower guide (2) and the upper guide (3). The slider (4) is hollow, can be inspected and the ends of the tracks (8) and (13) are housed inside it. The slider (4) is kept in a vertical position thanks to the synchronisation between a first portion (24a) of a chain (24) coupled to the track (8) and a second portion (24b) of the chain (24) coupled to the track (13). The fly screen (1) comprises a lateral box (5) comprising a winding tube (7), and a mesh (6) comprising a lower end (6c) and an upper end (6d) respectively slidable in the lower (2) and upper (3) guides. The mesh (6) is fixed with a first lateral end (6a) to the slider (4) and with a second lateral end (6b) to the winding tube (7) of the lateral box (5). The lower guide (2) and the upper guide (3) define a sliding plane (S) of the mesh (6). Each lower track (8) defines a sliding channel (8b) of the mesh (6), delimited by a first lateral surface (9a) and a second lateral surface (9b) which are opposite each other. Each lateral surface (9a, 9b) comprises a plurality of brushes (11) protruding towards the inside of the sliding channel (8b). The brushes (11) are arranged inclined towards a lower surface (12) of the sliding channel (8b) and are configured for locking the lower end (6c) of the mesh (6) if the lower end (6c) tends to escape from the sliding plane (S).