Pullout Guide Fastening on Side Grids Without Rod Play
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Solution Overview
Problem
Existing fastening systems for pullout guides on side grids require significant installation effort due to plastic deformation and do not ensure play-free fixation on rods with varying diameters, leading to potential movement and tilt loads during use.
Innovation Solution
A fastening system with inclined contact surfaces on front and rear fastening elements that enclose and engage with the rod's angled end sections, allowing for play-free arrangement and easy installation on rods with different diameters, using a combination of V-shaped receptacles and gap threads to accommodate varying rod diameters and distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quick fastening elements are plastically deformed to fix the pullout guide on the horizontal rod, then the fixation is play-free and adaptable to different rod diameters, but the installation effort increases significantly
Solution Approach 1:
The fastening system is divided into separate components: the pullout guide with fastening elements and the horizontal rod with angled end sections. The V-shaped receptacles are pre-formed on the fastening elements, separating the deformation process from the installation process, allowing easy installation without plastic deformation during assembly.
Solution Approach 2:
The V-shaped receptacles are pre-formed on the fastening elements before installation. This preliminary formation of the receptacles eliminates the need for plastic deformation during installation, reducing installation effort while maintaining play-free fixation capability.
2Ease of operation
If mounting brackets with U-shaped clamping sections are used to fix the pullout guide manually, then installation is easier, but the fixation may not be sufficiently secure against tilt loads and movement
Solution Approach 1:
The fastening elements feature asymmetric V-shaped receptacles with inclined contact surfaces specifically oriented to counteract tilt loads and movement in critical directions. The inclined surfaces at 20°-40° to the vertical provide mechanical advantage for resisting lateral and tilting forces while maintaining easy installation.
Solution Approach 2:
The V-shaped receptacles provide curved, formfitting engagement with the cylindrical rod, creating point contact zones that naturally distribute loads and prevent movement. The geometric curvature of the V-shape complements the rod's circular cross-section for secure fixation.
3Ease of manufacture
If the fastening system uses fixed geometry components, then manufacturing is simpler, but it cannot accommodate rods with varying diameters without play
Solution Approach 1:
The V-shaped receptacles with inclined contact surfaces serve multiple functions: they accommodate a range of rod diameters through geometric compatibility, provide formfitting engagement for play-free fixation, and resist multi-directional loads including tilt loads. This universal design eliminates the need for diameter-specific components.
Solution Approach 2:
The inclined contact surfaces are designed with specific angle parameters (20°-40° to the vertical) that optimize the balance between accommodating rod diameter variations and providing secure fixation. The angular parameters enable the fastening elements to adapt to different rod sizes while maintaining reliable load-bearing capability.
Data Source
AI summary
A fastening system comprises a side grid, a pullout guide, and multiple fastening elements fixed on the pullout guide, by means of which the pullout guide is fixed in a formfitting manner on a horizontal rod of the side grid, wherein the horizontal rod has a middle section extending in a longitudinal direction and two angled end sections, which are each fixed on an upright of the side grid, wherein at least a front fastening element has at least one contact surface inclined in relation to the vertical for contact on the middle section of the rod, and at least one rear fastening element has a contact surface inclined in relation to the vertical on the middle section of the rod, wherein an essentially V-shaped receptacle is formed on the front fastening element, which encloses the front angled end section of the rod from above. Furthermore, the invention relates to a method for installing a fastening system.