Pneumatic Tube Magazine Insert for Sample Tube Protection
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Solution Overview
Problem
Pneumatic tube conveyor capsules subject sample tubes to significant forces during transport, leading to unwanted changes in sensitive materials like blood, causing hemolysis and measurement distortions, and existing solutions fail to provide reliable protection and handling.
Innovation Solution
A magazine insert with a non-rotatable magazine drum and a pivotable fastening unit, actuated by a slider, secures sample tubes in receiving chambers, preventing them from being thrown around and allowing for easy unloading regardless of orientation, using elastically deformable fastening elements and a control cam for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sample tubes are transported in pneumatic tube conveyor capsules without special securing, then transport speed and efficiency are improved, but sample tubes are subjected to enormous forces causing hemolysis and measurement distortions
Solution Approach 1:
The magazine insert is divided into multiple receiving chambers arranged radially, each capable of independently securing a sample tube. This segmentation allows each tube to be individually protected while maintaining overall system efficiency
Solution Approach 2:
The fastening unit is designed to be pivotable between a fastening position (securing tubes during transport) and a release position (allowing easy unloading). This dynamic mechanism adapts to different operational phases without compromising transport speed
2Object-affected harmful factors
If a secure fastening mechanism is implemented to protect sample tubes during transport, then sample integrity is improved, but device complexity increases
Solution Approach 1:
Multiple fastening elements are combined into a single pivotable fastening unit that can be actuated by one slider. This merging reduces the number of independent components while maintaining secure fastening of multiple tubes simultaneously
Solution Approach 2:
The spring element automatically returns the fastening unit to the fastening position after tubes are loaded, and gravity assists in tube unloading when the fastening unit is released. This self-service mechanism reduces the need for complex actuation systems
3Object-affected harmful factors
If a complex fastening system is used to securely hold sample tubes, then protection during transport is improved, but ease of operation for loading and unloading deteriorates
Solution Approach 1:
The pivotable fastening unit transitions between fastening and release positions, enabling easy access to sample tubes during loading and unloading while maintaining secure holding during transport
Solution Approach 2:
The spring element and gravity work together to automatically return the fastening unit to the fastening position and facilitate tube unloading, reducing manual intervention and improving operational ease
4Device complexity
If the magazine insert is designed to be emptied from one side only, then structural simplicity is improved, but productivity decreases due to orientation constraints
Solution Approach 1:
The magazine insert is designed with receiving chambers and fastening elements that function identically regardless of orientation. This universality allows the insert to be emptied from either end of the pneumatic tube conveyor capsule, doubling the flexibility and efficiency of the system
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 magazine insert effectively prevents sample tube movement and impairment during transport, reducing analysis errors and facilitating easy unloading, while being cost-effective and suitable for various sample tube diameters.
Implementation Method 1
a spring element, by means of which the fastening unit can be transferred from the release position back into the fastening position
Implementation Method 2
In the release position, the sample tubes can slide out of the magazine insert in axial direction, facilitated by gravity
Data Source
AI summary
A magazine insert for a pneumatic tube conveyor capsule for receiving sample tubes filled with bodily fluids includes a magazine drum, a fastening unit, a slider and a catch element. The magazine drum has a plurality of receiving chambers for the sample tubes. The fastening unit is pivotable about the longitudinal axis from a fastening position to a release position. The slider in the central recess of the magazine drum is slidable in axial direction from a first functional position bidirectionally to a respective second functional position relative to the magazine drum. The catch element is fastened to the slider and extends in radial direction into a control cam of the fastening unit. A pivoting of the fastening unit from the fastening position to its release position can be effected by transferring the slider to its corresponding second functional position.