1. Field of the Invention
The present invention relates generally to truss systems, and in particular, to a truss assembly apparatus.
2. Description of Related Art
Trusses provide general purpose skeletal structures designed to support lighting and audio equipment for live stages, theatres, night clubs, church installations, and other mobile applications. Trusses generally include a variety of different modular truss elements or members that can be interconnected to build structures of different shapes and forms by a designer to independently create whichever lighting, audio, or other affect or appearance may be desired.
Typically, each of the truss members are modular and can be connected together and dismantled quickly. The modular members may include square truss members, triangular truss members, I-beam truss members, clamps, box truss members, circular truss members, lifts/lifters, junction blocks, truss corners, towers, sleeve blocks, couplers and clamps among others. The truss members generally run about 0.5 meters in length and are either straight lengths or circular arcs and have connectors to mate the members together.
Oftentimes the same structure must be recreated many times in different places. For example, in a rock and roll touring show the truss work and stage effects must be created and recreated in different places along the tour. On other occasions, the structures are created once and then dismantled. For example, a trade show or political convention will be designed in a particular manner for a particular venue and for an audience at the venue. Then, once the show or convention is complete, the trusses are dismantled and the members are reused in other applications later. In any case, once the trusses are in place they must also be strong and permanent for usage without concerns about the structural performance while they are in place.
Embodiments of the present invention provide an apparatus and method for assembling truss members together. In one embodiment of the present invention, the apparatus comprises a first lever and a second lever joined at a joint mechanism (pivot pin), with the pivot pin residing closer to one end of the levers. The first lever further comprises a handle at one end, and a first head at another end, wherein the pivot pin resides closer to the first head. The second lever also comprises a handle at one end, and a second head at another end, wherein the pivot pin resides closer to the second head. In one embodiment, the handles are similar in shape, dimension, and reside towards the same end from the pivot pin.
The first head further comprises a first tip for engaging a head of a truss pin. Additionally, the second head comprises a second tip for supporting a truss member. The second tip is substantially curved in profile and capable of both receiving and supporting the walls of a truss member. The second tip further comprises an opening such as a slot allowing for at least the tip of the pin to pass there through.
The length of the handles may be selected depending on the leveraging force desired for driving the truss pin through holes in the truss member. The shape and size of the tips may be selected to accommodate different truss member shapes and sizes. Further, the handles may be of the adjustable ratchet type, slip joint type, groove joint or tongue-and-groove type, etc., which allow adjusting the length of the handles relative to the pivot pin, or adjusting distance of the heads for different leverage requirements.
The following description is made for the purpose of illustrating the general principles of the present invention and is not meant to limit the inventive concepts claimed herein. Further, particular features described within can be used in combination with other described features in each of the various possible combinations and permutations. Unless otherwise specifically defined herein, all terms should be given their broadest possible interpretation including meanings implied from the specification as well as meanings understood by those skilled in the art and/or as defined in dictionaries, treatises, etc.
Embodiments of the present invention provide a truss assembly device, comprising a first lever and a second lever coupled together about a joint mechanism, the first lever comprising a first handle residing at one end of the first lever and a first head residing at another end of the first lever. The second lever comprising a second handle residing at one end of the second lever and a second head residing at another end of the second lever. Wherein the first head is substantially curved in a concave-upward profile configured for receiving a truss member and wherein the second head is configured for engaging and driving a truss assembly pin through holes in the truss member when the first lever and the second lever move towards each other thereby causing the first head and the second head to move towards each other.
Referring now to the embodiments of the invention shown in the drawings,
The holes 4 on the so connected truss pieces 2A, 2B (forming truss member 2) are aligned to allow a truss pin 3 to at least partially pass there through, the holes 4 essentially perpendicular to the axis of the connected truss member 2. This action locks the truss pieces together to form the truss member, preventing one tube from sliding out from the other. The apparatus 1 allows the truss pin 3 to be driven into the holes 4 of the connected truss member 2 with sufficient force to properly engage the inner rims of said holes. Moving the first lever 5 and the second lever 6 towards each other (e.g., by gripping the handles 5A and 6A in one hand and squeezing them toward each other) causes the first head 5B and the second head 6B to move towards each other for the tip 6T to engage a tip/head 3H of the truss assembly pin 3T and drive the truss assembly pin 3T through holes 4 in the truss pieces 2A, 2B to form an assembled truss member 2 therefrom.
As exemplified in
The length of the handles 5A and 6A may be selected depending on the leveraging force desired for driving the truss pin 3 through the holes 4 in the truss member 2. The shape and size of the tip 5T may be selected to accommodate different truss member 2 shapes and sizes. Although example truss members 2 are shown as tubes with circular cross-section, other shape truss members may also be used (e.g., rectangular cross-section, elliptical cross-section, triangular cross-section). As such, the tip 5T may have different side profiles or cross sections (e.g., a rectangular, elliptical, triangular). Further, the handles 5A and 6A and pivoting mechanism may be of the adjustable ratchet type, slip joint type, groove joint or tongue-and-groove type, slotted channel type, etc., which allow adjusting the length of the handles 5A and 6A relative to the pivot pin 7, adjusting distance of the heads 6B and 5B for different leverage requirements, or allow moving of the heads 6B and 5B in a linear fashion.
As the handles 5A and 6A move towards each other, levers 5 and 6 pivot about the pin 7, thereby causing tips 5T and 6T to move towards each other. Conversely, as the handles 5A and 6A move away from each other, levers 5 and 6 pivot about the pin 7 causing tips 5T and 6T to move away from each other. When the handles 5A and 6A move towards each other, tip 6T exerts a force upon the pinhead 3H which in turn drives the truss pin 3 through the holes 4 in the truss member 2. Simultaneously, tip 5T exerts a force upon the walls of the truss member 2 which in turn prevents the truss member 2 from moving in a direction away from tip 6T. As the pinhead 3H nears the topmost hole 4 in the truss member 2, the pin tip 3T passes through the slot 5S (
In an alternative embodiment exemplified in
As the handles 5A and 6A move towards each other, levers 5 and 6 pivot about the pin 7, thereby causing tips 5T and 6T to move towards each other. Tip 6T exerts a force upon the pin tip 3T which in turn drives the truss pinhead 3H out of the holes 4 in the truss member 2. Simultaneously, tip 5T exerts a force upon the walls of the truss member 2 which in turn prevents the truss member 2 from moving in a direction away from tip 6T. As the pin tip 3T nears the topmost hole 4 in the truss member 2, the pinhead 3H passes through the slot 5S and extends in a direction below the head 5B, thus disengaging from the inner rims of the holes 4 in the truss member 2.
Process block 104 comprises providing two truss pieces 2A, 2B (
After providing the truss assembly pin pursuant to process block 106, process block 108 comprises interconnecting the truss pieces 2A, 2B, to form a truss member 2 (
Process block 110 comprises aligning the holes 4 on the so connected truss pieces 2A, 2B (forming truss member 2) to allow the truss pin 3 to at least partially pass there through (
Engaging the truss member with the truss assembly apparatus as per process block 112 comprises supporting the truss member 2 with the tip 5T of the head 5B (
Driving the truss assembly pin 3 through the truss member 2 according to process block 116 entails moving handles 5A and 6A towards each other so that levers 5 and 6 pivot about the pin 7, thereby causing tips 5T and 6T to move towards each other (
The truss member 2 formed from two separate truss pieces 2A, 2B (
Driving the truss assembly pin out of holes in the truss member pursuant to process block 210 entails moving handles 5A and 6A of the apparatus 1 towards each other so that levers 5 and 6 pivot about the pin 7. As a result, tips 5T and 6T move towards each other; tip 6T exerts a force upon the pin tip 3T which in turn backs out the truss pinhead 3H out of the holes 4 in the truss member 2 (
Finally, process 212 comprises disengaging the truss member 2 to obtain two truss pieces 2A, 2B (
The present invention has been described in considerable detail with reference to certain preferred versions thereof; however, other versions are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the invention. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
This application claims priority to U.S. Provisional Patent Application Ser. No. 61/240,082 filed Sep. 4, 2009, incorporated herein by reference in its entirety.
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/US10/47905 | 9/3/2010 | WO | 00 | 3/2/2012 |
Number | Date | Country | |
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61240082 | Sep 2009 | US |