Secure Storage Cart Assembly With Preloaded Frame Joints
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Solution Overview
Problem
Existing storage carts suffer from high tolerances at the edges and corners, which can lead to vibration and noise during transport, and they lack security features, particularly at the joints and corners, and the assembly process is tedious and inefficient, lacking ergonomic features, particularly at the edges and corners.
Innovation Solution
A storage cart kit for on-site assembly with improved assembly methods, including a tolerance adjustment mechanism, adjustable hinges, and a handle system that can be secured without fasteners, to reduce tolerances and enhance security and adjustability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If storage carts are assembled as kits on-site, then assembly flexibility and portability are improved, but manufacturing tolerances at frame joints increase leading to insecurity and vibration
Solution Approach 1:
The patent applies preliminary action by providing pre-assembled corner assemblies that include pre-attached frame panels and corner posts. These corner assemblies are manufactured with precise tolerances in a controlled factory environment, then shipped as complete units to be assembled on-site. This allows the complex precision work to be done beforehand when proper equipment is available, while maintaining the benefits of on-site kit assembly.
Solution Approach 2:
The patent segments the storage cart into modular components: corner assemblies (which are pre-assembled with high precision), frame panels, and door panels. By dividing the structure into these segments, the critical joint areas (corners) can be manufactured with high precision in advance, while the overall assembly maintains flexibility for on-site construction.
2Device complexity
If traditional storage carts are used, then structural simplicity is maintained, but security against tool insertion and prying attacks is insufficient
Solution Approach 1:
The patent applies local quality by enhancing security features specifically at critical locations (corner assemblies and frame joints) rather than throughout the entire structure. The corner assemblies include reinforced construction and anti-prying features at these vulnerable points, while maintaining overall structural simplicity in non-critical areas.
Solution Approach 2:
The patent implements preliminary anti-action by designing corner assemblies with features that prevent tool insertion and prying attempts before an attack can occur. The reinforced corner construction and interlocking frame panels create barriers that stop potential attackers in advance, rather than relying on passive resistance.
3Ease of operation
If frame panels are connected with standard tolerances, then assembly ease is improved, but vibration and noise during transport increase
Solution Approach 1:
The patent uses preliminary action by pre-assembling corner units with frame panels attached in a controlled factory environment where proper alignment and tolerance control can be achieved. This preliminary assembly ensures tight fits and proper alignment before the components are shipped for final on-site assembly, eliminating vibration and noise issues without complicating the user assembly process.
4Stability of the object's composition
If door panels are rigidly fixed, then structural stability is improved, but adjustability of door angle and handle position is reduced
Solution Approach 1:
The patent applies dynamics by incorporating adjustable mechanisms that allow the door panels and handle positions to be modified as needed. The corner assemblies include features that enable angle adjustment of door panels relative to frame panels, and the handle can be repositioned along the door panel. These dynamic adjustments maintain structural stability when locked in position while providing adaptability when adjustment is needed.
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 solution provides a secure and stable storage cart with reduced tolerances and improved assembly efficiency, ensuring the cart remains secure and stable during transport and use, with reduced vibration and noise.
Implementation Method 1
a tolerance adjustment mechanism configured to apply a preloading force to the plurality of frame panels when the storage cart is assembled
Implementation Method 2
attaching the door panel by advancing a threaded portion of a hinge to the door panel to an appropriate depth
Implementation Method 3
a handle comprising a handle base that extends between, and is secured within, each of a first and second handle receiver, wherein each of the first and second handle receiver is welded to one of the plurality of frame panels
Data Source
AI summary
Secure storage carts are disclosed herein and capable of being assembled and disassembled on-site without common disadvantages that affect storage carts designed for on-site assembly. Secure storage carts disclosed herein may be assembled to a reduced tolerance, eliminating potential points of failure in the assembled cart, and giving the user a more solid feel to the operation. Methods for assembling storage carts are also disclosed herein and can include adjusting the extension depth of a door panel hinge. Methods disclosed herein also may include applying a preloading force to the cart frame, to reduce tolerances between components of the storage cart once assembled. Kits are also provided herein containing the components required to assemble the cart on-site, in configurations that may be easily transported to and from the job site when disassembled. Kits also may provide for straightforward and secure assembly of the carts.