Category: Music

Rockstar Guitar Stand

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---- CUSTOMIZED ADAPTATION --------- PURPOSE: To create a customized guitar stand that attaches to a wheelchair for an adult male with cerebral palsy. The Rockstar guitar stand provides a safe and durable attachment for the user’s wheelchair which supports his electric guitar and keyboard. The device attaches to the armrest supports of the wheelchair and allows for adjustment of the guitar platform to the most comfortable position for the user. When brainstorming design ideas it was decided that a device that attached underneath the armrests would be ideal; however, the various wheelchair attachments and upgrades commercially available were not suited for this adaptation. Rather than drill into the underside of the armrest, custom-fit, aluminum brackets were created that clamp to the vertical posts of the wheelchair and hold the insert tubes in place. Aluminum 6061 was used as the bracket material due to its strength, resistance to rust, and the ability to be easily machined. Two brackets were created: A and B. Bracket A was a simple rectangle with two holes drilled through it to hold the back vertical post of the wheelchair and an insert tube, along with two screws on the inside of the face of the bracket. Bracket B was designed to account for the seatbelt connection near the front vertical wheelchair post. The dimensions required a rectangular block to be cut from the bracket. For the same reason, the screw holes needed to be placed out the outside of the bracket, rather than the inside. In both brackets, .25-inch 20 socket head cap screws were utilized. The length of the Screw D is .25 inch longer than Screw C in order to function as a set screw and hold the insert tube in place. Screws A and B are of equal lengths. To sustain inward and outward adjustability, a tube, rod, and pin system were used. Two .75-inch 3003 aluminum insert tubes were semi-permanently attached to the wheelchair via the aforementioned brackets. Two 6061 aluminum rods were lathed down to fit snuggly into each tube to limit vibration and excess stress. A single hole was drilled through one of the insert tubes along with four similar holes through the respective rods. This, along with a push pin, allows the user to adjust the device to four, locked positions. To control vertical adjustability. the bottom connectors were designed with a hole which the vertical tube would move through. A single, pushpin hole was drilled through the side of each connector, and matching holes were drilled vertically through the vertical post; a push pin on each side locked the device in place. The bottom connectors were also used to connect the vertical posts to the rods. Holes were then drilled for the aluminum rod and, for stability, the lower horizontal tube. Each was attached to the bottom connectors with a .25-inch 20 socket head cap screw. The rotational adjustability was attained using two Variloc hinges. The plastic Variloc hinge was used to hold the neck of the guitar; a modified, store-bought guitar stand was used in conjunction with the hinge to provide a housing for the neck of the guitar. On the opposite end of the guitar, an aluminum hinge was used to hold the body of the guitar. The hinge was attached by bolts to a square block of wood to create back support for the guitar body holder. A steel J-shaped support was drilled into the wood to ensure that the guitar did not shift vertically, while a strap clamp was used to limit the guitar from horizontally shifting. Future project goals include adapting the device to be more universal and thereby more marketable. The under-armrest bracketing system could be altered to fit other wheelchair models, and the guitar body holder could be adjusted to fit several types of guitars. This device was entered into the RESNA 2011 Student Design Competition where it placed as a semi-finalist under the tech for cognitive & sensory impairments category. TITLE: Rockstar Guitar Stand (Duke University). JOURNAL: RESNA Student Design Competition. REF:


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Rockstar Guitar Stand