Snap-Fit Screen Profile Coupling for Thermal Expansion Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coupling devices for screen assemblies in greenhouses or warehouses face challenges due to thermal expansion differences between the screen profiles and the support structure, leading to misalignment and tension in the drive system.
Innovation Solution
A coupling device with a base element featuring a slider portion that can be inserted into an elongate channel of the screen profile and locked using a snap fitting connection, allowing self-alignment with pulleys and easy installation without requiring assembly before interconnecting screen profile portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed coupling device is used to connect screen profiles to the drive system, then the alignment with pulleys is precise initially, but thermal expansion causes misalignment and tension in the drive system
Solution Approach 1:
The coupling device incorporates a slider portion that can move dynamically within the elongate channel, transforming from a fixed rigid connection to a dynamic adjustable connection. This allows the coupling device to adapt its position along the channel in response to thermal expansion of the screen profile, maintaining alignment with the pulleys while accommodating dimensional changes in the aluminum profile.
2Adaptability or versatility
If a slidable coupling device with slider portion is used to compensate for thermal expansion, then misalignment is prevented, but the assembly process becomes tedious requiring insertion from outer ends before connecting portions
Solution Approach 1:
The snap-fit coupling device allows the slider portion to be pre-positioned and secured within the elongate channel at any intermediate location before the screen profile portions are connected. This preliminary positioning eliminates the need to insert sliders from outer ends after assembly, as the device can be engaged at any point along the channel during the assembly process.
3Adaptability or versatility
If dilatation sets are used at terminal sections to reduce expansion and shrinkage, then thermal expansion is compensated, but the number of components increases and installation time is extended
Solution Approach 1:
The coupling device merges the functions of thermal expansion compensation and drive system connection into a single integrated component. The slider portion within the elongate channel provides expansion compensation while the coupling mechanism simultaneously connects the screen profile to the drive means, eliminating the need for separate dilatation sets and improving installation efficiency.
4Adaptability or versatility
If dilatation sets are provided at the connection between adjacent screen profiles, then thermal expansion is reduced, but screen cloth may escape from the chamber at the opening between adjacent profiles
Solution Approach 1:
The coupling device extracts the expansion compensation function from the terminal sections and places it at the drive connection point. By positioning the slider portion within the elongate channel at the coupling location rather than at the terminal sections or between adjacent profiles, the solution avoids creating openings where screen cloth could escape while still providing effective thermal expansion compensation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The coupling device effectively compensates for thermal expansion, maintains precise alignment with pulleys, and simplifies the installation process by allowing engagement at any intermediate channel position, reducing the risk of accidental disengagement.
Implementation Method 1
the screen profile has a different thermal expansion than the support structure. In particular, in large greenhouses with long screen profiles, this may lead to a situation wherein the coupling device is no longer precisely aligned with one or more of the pulleys
Implementation Method 2
locked in the channel through a snap fitting connection between the device and the screen profile
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
A device for coupling drive means to a screen profile and a screen assembly, greenhouse or warehouse with such a device. The device comprises a base element with a slider portion for sliding the device through an elongate channel of the screen profile, and a drive means carrier connected to the base element. The slider portion is configured to be inserted into the channel through the elongate channel opening and locked in the channel through a snap fitting connection between the device and the screen profile. The invention further relates to a method for arranging the device in the channel of a screen profile.