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The Great Team 1
Week 6 : Midterm Presentation
Bunk Bed Converter
Adam Brown
Blaine Gardner
Sarah Gleaton
Jimmy Jiang
Addisu Lemlem
Lee Tschaepe
6/21/2006
The Great Team 2
The Problem
Bunk beds are a great way to sleep multiple people in a limited space. But what if a bigger bed is needed for a guest or the kids outgrow the bunk beds? Our Bunk Bed Converter will be designed so that quick and easy conversion from traditional bunk beds to a single king-size bed is possible by only one person.
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The Problem
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Design Goals
• Must be operable by one person
• Must be safe in all forms – in bunk bed or king bed position and while being converted between the two
• Must be cost effective
The Great Team 5
Design Partition• Raising/Lowering System
Design the overall system so that one or two users can easily and safely convert twin bunk beds into one king size bed.
• Lift Assist/Collapse SupportDesign a spring or another mechanical device that
keeps the top bunk from collapsing to the ground during the lowering process while also helping to pull the upper
bed when returning it back into the top bunk position.
• Locking Bed in Bunk Bed PositionDesign a locking system so that it will not collapse
accidentally and also prevents a young child from unlocking the bed.
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Conceptual Designs
• Hinge Design
• Diagonally Sliding Design
• Fold-over Design
• Slotted Design
• Slider Design
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Hinge Design• This design allows the
top mattress to be moved down to an even level with the bottom mattress using two hydraulic or spring arms.
• The arms are mounted on a brace below the bottom mattress, with the rear arm slightly offset below the front arm. They are attached to the top mattress frame
• Additionally, it has a leg that can be pulled out for support in the king position.
The Great Team 8
Diagonally Sliding DesignDescription• The frame and lower bed are stationary• The upper bed is attached to the frame at one end and a diagonal
track at the other• The upper bed can be detached from the frame and held as it
slides down next to the lower bed
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Fold Over
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Slotted Design
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•Bottom bunk slides out through a track sub-assembly•Foldable corner legs provide support for bottom bunk bed in extended position•Counterweight or Spring helps lower the top bunk slowly•Counterweight or Spring can also provides force to lift the top mattress back up to the bunk position
Slider Design
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Patent Search
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Patent Search
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Selection Criteria
• Stability
• Safety
• Ease of Use
• Cost
•Ease of Assembly
•Reliability
•Aesthetics
•Durability
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Pair-wise Comparison
Aesthetics Cost DurabilityEase of
AssemblyEase of
Use Reliability Safety Stability DummyTotal Score Rank Weight
Aesthetics 0 1 1 0 1 0 0 1 4 5 0.1111Cost 1 1 0 1 1 0 0 1 5 4 0.1389Durability 0 0 0.5 0 0 0 0 1 1.5 7 0.0417Ease of Assembly 0 0 0.5 0 0 0 0 1 1.5 7 0.0417Ease of Use 1 1 1 1 1 0 0 1 6 3 0.1667Reliability 0 0 1 1 0 0 0 1 3 6 0.0833Safety 1 1 1 1 1 1 0.5 1 7.5 1 0.2083Stability 1 1 1 1 1 1 0.5 1 7.5 1 0.2083Dummy 0 0 0 0 0 0 0 0 0
10.50
Vertical Criteria better than HorizontalTie
Comparison
Horizontal Criteria better than Vertical
The Great Team 16
Evaluation Matrix
WeightHinge
Design
Diagonally Sliding Design
Fold Over Design
Slotted Design
Slider Design
Baseline (Detachable Bunk Beds)
Stability 0.2083 3 4 5 4 4 5Safety 0.2083 3 2 1 4 3 2Ease of Use 0.1667 4 5 1 3 5 1Cost 0.1389 4 4 5 2 2 5Aesthetics 0.1111 3 4 5 1 1 3Reliability 0.0833 5 4 5 3 2 5Ease of Assembly 0.0417 4 4 5 4 3 5Durablility 0.0417 4 4 4 3 3 4
TOTAL 3.556 3.750 3.458 3.097 3.097 3.444
RELATIVE = Total/3.75 0.948 1.000 0.922 0.826 0.826 0.919
5 Excellent4 Good3 Adequate2 Questionable1 Poor
Design Score
CONCEPTS
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The Prototype
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Questions?
