Abstract:
A quick release support post and associated method are provided to attach a cable to a structure and later move the cable location without the need for many small parts and tools. Thus, cables and wires may be installed in hard-to-reach areas quicker and easier than with conventional clamps because no tools are required and an installer generally does not have to use both hands. Because the quick release support posts and associated method require only a hole in the structure for installation, there is no need for extra materials, and minimal weight is added to the structure during installation or movement. In addition, the quick release support posts and associated method of the present invention create efficient cable management systems because the support posts may be various lengths and cables may be grouped and secured to the support posts together, which makes trouble shooting and later moves much easier.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to securing cables to structures, and more particularly to quick release support posts that facilitate in cable installation, post-installation movement, and cable management.  
       BACKGROUND OF THE INVENTION  
       [0002]     Modern vehicles and other structures utilize many systems, such as lighting and electronics, that have various separate components. For example, the systems may have dedicated components, such as receptacles, controls and/or displays, and shared components, such as power supplies and processors. The components may be located remotely from each other, which necessitates cables, including wires, to connect the components for the systems to function properly. Thus, the cables may span a considerable length depending upon the locations of the components relative to one another. It is typically desirable to enclose the cables in tubes, such as raceways, that extend along a relatively secluded area of the vehicle or structure in order to protect the cables and the people in the vehicle or structure. Often, however, the raceways are filled with cables or are otherwise accessible and the system installers must extend bundles of cables through another area of the vehicle or structure.  
         [0003]     The cables outside of the primary raceways are typically assembled into bundles and secured using a variety of fasteners, such as nylon-type clamps and saddle-brackets. It is essential that the clamps are installed without damaging the cable bundles in order for the systems that the cables support to function properly. It is also important that once the cable clamps are installed, they remain in place when subjected to various vibrational and other forces that the structure containing the cables and clamps may encounter to prevent damage to the cables, such as by abrasion between the cables and the clamps. For example, modern aircraft require hundreds of clamps to secure the many cables that connect the systems and extend along the interior of the aircraft. To ensure the cables are out of the way of passengers or crew onboard the aircraft, some of the clamps may be located in relatively secluded areas of the aircraft that may be difficult to reach, such as stow bins, side panels and/or ceiling panels.  
         [0004]     Conventional cable clamps are typically in the form of a P-clamp or elongated strap in combination with a fastener. For example, U.S. Pat. Nos. 4,813,105 and 5,354,021 are clamps used in the aviation industry that utilize an adjustable flexible strap to secure the cable bundle, as well as a fastener to attach the assembly to a structure. Conventional cable bundle clamps require at least one, and typically two, items of loose hardware and structural provisioning for each attachment to add support to a portion of cable weighing only a few ounces. For instance, in order to install most cable bundle clamps, a hole must first be drilled into a secondary structure face sheet, such as in stowbins or interior panels. A clamp or bracket is positioned around the cable. Then, potting compound and a steel insert is placed within the hole to provide an “anchor” for a screw that is inserted through a hole in the cable clamp or bracket and within the potting to secure the assembly onto the face sheet. Therefore, conventional cable bundle installation generally requires many pieces of loose hardware and tools to assemble the clamps. Consequently, when installing cable bundles in tight areas, it is difficult to use the tools and manage the small parts. In addition, each interior cable bundle requires enough cable clamp attachments to keep the clamps spaced less than one foot apart for proper support. Because of this difficulty and the multiple number of clamps that must be installed, the conventional installation process is labor-intensive and time consuming.  
         [0005]     Frequently, it is also desirable to stack cable bundles in “Christmas tree” fashion by arranging the clamps in a stack using one fastener. Therefore, when one clamp is in need of repair or removal, several other clamps will first require removal with tools before enough space is created to reach the cable bundle clamp requiring attention, which is also labor-intensive and time-consuming for the installer. In addition, when stacking clamps of this type, cable management is difficult because there is no way to ensure that certain types of cables, such as those for the electrical systems, are grouped together. Without cable management, trouble shooting and movement of only certain systems and their associated cables is difficult.  
         [0006]     Furthermore, a slight change in the location of a component of a system may require the cable bundle routes to change, which, at the least, requires a significant amount of time and labor to remove the clamp fasteners and clamps with tools and reinstall them in the new location. In some cases, the structural designers/engineers may have to revise the structure to accommodate the new cable bundle attachments due to the space required and structural support needed for installation. Thus, because new holes must be drilled and new potting compound and/or steel insert applied, the existing structure may not be able to withstand the extra weight. This is most prevalent on passenger interior commodities of an aircraft, such as in sidewalls, stowbins, and ceiling panels, which may be made of lightweight materials, such as composite face sheets over a honeycomb-type core material. In addition, the structural panels cannot provide a grid of inserts to allow for many possible cable bundle installations because of the excessive weight of the inserts and the prohibitive expense of the labor involved in the tedious process of preparing for attachment that may not be utilized.  
         [0007]     Another clamping technique utilizes an adjustable strap with one hole at a first end and a series of holes arranged linearly near the opposed second end, such that the fastener may be inserted through both the one hole and an appropriate hole selected from the series of holes near the second end. As such, the strap forms a loop through which the cable or cables to be secured to the structure may extend. The fastener includes an expandable member that is inserted into a hole of appropriate size in the structure after also being extended through the holes of the strap. A pin is then inserted through the expandable member, which expands the expandable member to secure the clamp to the structure. While this clamping technique is useful because it eliminates the need for tools, potting compound, and steel inserts, the strap feature with many holes along one end does not provide a strong enough clamp for cables in many applications that are subjected to relatively large forces, such as frequent movements and vibrations. Thus, if the strap is wrapped around many cables or one large cable, then the loop that extends about the cable(s) will include a larger number of the holes, which is the weakest part of the strap. Thus, the strap is more likely to break. In addition, because there is no way to cinch the strap securely around the cables since the locations of the holes in the strap are predetermined, then the cables may be loose in the strap, which could cause the strap to rub against the cables and damage the cables such that the systems supported by the cables may become inoperable. Furthermore, the straps may not be stacked due to the short length of the pin.  
         [0008]     There is, therefore, a need in the industry for an improved technique for tightly securing cables to a structure and permitting the cables to be released to more easily install and reroute cable bundles. It is also desirable to eliminate the need for tools to secure cables to a structure, which will permit the cables to be more readily installed in limited access areas and easily released when removal is desired. In addition, an improved technique for separately securing a number of cables in an orderly fashion is desired for the purposes of cable management. Furthermore, there is a need for a quick release cable clamp that is strong enough, and secures the cables tightly enough, to withstand the weight of heavy cables and forces, such as vibrational forces, without damaging the clamp or the cables.  
       SUMMARY OF THE INVENTION  
       [0009]     In accordance with the present invention, a quick release support post, associated method, and quick release cable clamp are provided to attach cables to a structure and to facilitate later removal of the post or clamp, or a later move of the post or clamp to a different location without the need for many small parts and tools. Thus, cables, including wires, optical fibers and the like, may be installed in hard-to-reach areas quicker and easier than with conventional clamps because no tools are required and an installer generally does not have to use both hands. Furthermore, because the quick release support post, associated method, and quick release cable clamp of the present invention require only a hole in the structure for installation, there is no need for potting compound or steel inserts, and no extra weight is added to the structure during installation or movement. As such, it is less likely that a weight-sensitive existing structure must be redesigned when moving the quick release support posts or clamps of the present invention than when moving the conventional clamps. In addition, the quick release support posts and associated method of the present invention create efficient cable management systems because the cables may be grouped and secured to the support posts together, which makes trouble shooting and later moves much easier. Overall, the quick release support posts and associated method of the present invention save significant time, labor, hardware, and associated costs because they are more efficiently installed, moved and removed than conventional cable clamps.  
         [0010]     One embodiment of the quick release support post of the present invention includes an elongated rod having a varying cross-section in the longitudinal direction, an elongate sleeve mounted on the rod, and at least one attachment element carried by the sleeve to attach at least one cable. The attachment element may be a ring with an opening that is larger than the sleeve and attached to the sleeve by a plurality of spokes extending inwardly from the ring to the sleeve. The support post of this embodiment may also include at least one tie member to attach the cable(s) to the attachment element.  
         [0011]     The sleeve is capable of being axially translated along the rod. The sleeve initially is mounted on the rod in a first position to facilitate insertion of a portion of the sleeve in a hole defined by the structure, then the sleeve may be translated along the rod to a second position to facilitate a positive engagement of the portion of the sleeve within the hole.  
         [0012]     In addition, in either of the above embodiments, the rod may have a first portion, which may be a first cylindrical portion, with a first cross-sectional shape and a second portion, which may be a second cylindrical portion, disposed proximate to and displaced in the longitudinal direction from the first portion. The second portion has a second cross-sectional shape that is larger than the first cross-sectional shape. The rod may be made of many pairs of first and second portions and, if so, then a circumferential groove may be located between the pairs. Because more than one sleeve may be mounted on the rod having many pairs of first and second portions, the circumferential groove facilitates breaking a rod that is initially too long to a shorter length appropriate for the number of sleeves. As such, each sleeve may be associated with a respective pair of first and second portions, and the sleeve may loosely surround the first and second portions while in the first position and may engage the second portion while in the second position. When engaging the second portion, at least a portion of the sleeve may radially expand, which will cause the sleeve to be positively engaged within the hole defined by the structure. Furthermore, the sleeve may be made of two parts, an expandable engagement member, which is the portion that expands as the sleeve is moved from the first position to the second position, and a sleevelike member connected to the expandable engagement member that carries the attachment element or otherwise permits engagement by the tie member.  
         [0013]     The method for attaching a cable to a structure of the present invention includes providing an elongated rod having a varying cross-section in a longitudinal direction and an elongate sleeve capable of being axially translated along the rod, inserting a portion of the sleeve into a hole defined by the structure, translating the sleeve axially along the rod to facilitate positive engagement of the sleeve within the hole, and attaching at least one cable to the sleeve. The method also may include mounting the sleeve upon the rod in a first position prior to inserting a portion of the sleeve into the hole. In addition, translating the sleeve axially along the rod may include expanding the portion of the sleeve within the hole to positively engage the sleeve within the hole. Furthermore, attaching at least one cable to the sleeve may be accomplished by encircling the cable(s) and an attachment element that may be carried by the sleeve with a tie member.  
         [0014]     Thus, the embodiments of the support post and associated method summarized above provide an efficient manner in which to secure cables to structures without requiring tools for installation or movement of the support post. Because of the shape and cooperation of the elongated rod and the sleeve, the sleeve is positively engaged within a hole to provide a base to which cables may be attached. In addition, because the quick release support post and associated method of the present invention do not require potting compound and/or a steel insert to install the clamps, but instead only require a properly sized hole in the structure, installing the support post is simple and does not add much extra weight to the structure. As such, the support posts may be moved to another location on the structure without concern over adding too much weight to weight-sensitive structures. Furthermore, the support post and associated method of the present invention provide efficient cable management because certain types of cables may be grouped together and kept separate from other cable types by securing the bundles to different attachment elements and/or different sleeves of the support post.  
         [0015]     Another embodiment is a quick release cable clamp that includes a pin, an expandable engagement member, and a clamp element defining an aperture of a predetermined size to receive a cable of a corresponding size. The pin has a first portion, which may be a first cylindrical portion, with a first cross-sectional shape and a second portion, which may be a second cylindrical portion, with a second cross-sectional shape that is larger than the first cross-sectional shape. The expandable engagement member is mounted on the pin in a first position and is capable of radially expanding as the engagement member is axially translated along the pin from the first position to a second position to facilitate engagement with a hole defined by the structure. The clamp element also defines an opening at each distal end through which said engagement member extends. Moreover, the clamp element may have a P-shaped cross-section when the distal ends of the clamp element meet.  
         [0016]     The cable clamp of the above embodiment also provides an efficient manner in which to clamp a cable with a clamp of a predetermined size without using tools or many small parts. In addition, this embodiment is easily moved to a different location on the structure because it also requires only a hole in the structure for installation. Therefore, all of the quick release cable clamp and associated method embodiments reduce the time, labor, hardware, and associated costs normally involved in cable clamp installation. 
     
    
     BRIEF DESCRIPTION OF DRAWINGS  
       [0017]     Having thus described the invention in general terms, reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:  
         [0018]      FIG. 1  is an exploded expanded view of a quick release support post including an elongated rod with a varying lengthwise cross-section and two sleeves adapted to axially translate along a portion of the rod according to one embodiment of the present invention;  
         [0019]      FIG. 2  is a cross-sectional view of the quick release support post of  FIG. 1  in a first position according to one embodiment of the present invention;  
         [0020]      FIG. 3  is a cross-sectional view of the quick release support post of  FIG. 1  in the second position after the sleeves are axially translated along a portion of the rod to cause the upper sleeve to engage the lower sleeve and to expand the lower sleeve into an engaging relationship within the hole defined by the structure according to one embodiment of the present invention;  
         [0021]      FIG. 4  is a perspective view of the quick release support post of  FIG. 1  in engagement with the holes defined by the structure, and tie members attaching the cables to the sleeves, according to one embodiment of the present invention;  
         [0022]      FIG. 5  is an exploded expanded view of a quick release cable clamp including a pin, an engagement member, and a cable clamp with a pre-defined shape to receive a cable according to another embodiment of the present invention;  
         [0023]      FIG. 6  is a cross-sectional view of the quick release cable clamp of  FIG. 5  with the engagement member in a first position and a portion of the engagement member within the hole defined by the structure according to another embodiment of the present invention;  
         [0024]      FIG. 7  is a cross-sectional view of the quick release cable clamp of  FIG. 5  after the engagement member is moved from the first position to a second position to expand a portion of the engagement member within the hole defined by the structure to provide positive engagement within the hole; and  
         [0025]      FIG. 8  is a perspective view of the quick release cable clamp of  FIG. 5  mounted upon a cable and positioned in engagement with the hole defined by the structure, according to another embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0026]     The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout.  
         [0027]     The quick release support post of the present invention includes an elongated rod and an elongated sleeve mounted on the rod. The sleeve may include an expandable engagement member, such as an expanding rivet-like feature, near one end, such as at the base of the sleeve. In addition, at least one attachment element, such as a ring, may be carried by the sleeve, such as being longitudinally centrally located on the sleeve. The attachment element, such as a ring, may be attached to the sleeve by multiple spokes that allow straps or ties to be wrapped around the attachment element and an object, such as a cable, needing support. The sleeve defines a longitudinal hole to allow the rod to pass through the sleeve. At one end of the sleeve, the diameter of the hole may be compatible with the expandable engagement member, such as an expanding rivet, to allow multiple sleeves to be mounted on the rod. Thus, the cross-section of the rod may vary longitudinally to interface with the sleeve(s) via the expandable engagement member. As such, when the rod is pushed through the sleeve(s), portions of the rod may expand the expandable engagement member of a respective sleeve to lock the sleeve(s) onto the rod. The rod also may include grooves to allow the rod to be broken to a length that accommodates the desired number of sleeves. Therefore, the shape of the rod provides a tactile indication of the position of the rod relative to the expandable engagement member(s) of the sleeve(s).  
         [0028]     One embodiment of the quick release support post apparatus and method of the present invention is shown in  FIG. 1 . This exploded view of a support post illustrates the separate components of the support post, which include an elongated rod  10 , sleeves  12 ,  13 , and expandable engagement members  14 ,  15 . Although there are two sleeves  12 ,  13  and two expandable engagement members  14 ,  15  in the embodiment of  FIG. 1 , other embodiments may have one or more sleeves and one or more expandable engagement members, with the number of sleeves and the number of engagement members generally being equal. As explained below, the length of the elongated rod corresponds to the number of sleeves, with a longer rod supporting more sleeves.  
         [0029]     In the embodiment shown in  FIG. 1 , the elongated rod  10  has a handle  24 , a handle base  26 , and at least one pair of first and second portions, all of which extend longitudinally from the handle  24 . The handle  24  may be grasped by an installer and facilitates installation and removal of the sleeves  12 ,  13  and expandable engagement members  14 ,  15 . The handle base  26  may have a slightly smaller circumference than the opening  38  in the sleeve  12  such that the rod  10  cannot, or can only slightly, move in the lateral or radial direction when fully inserted in the sleeve  12  (i.e., the second position). The first and second portions, or pairs of first and second portions, extend longitudinally from the handle base  26 . The first portions  28 ,  34 , which may be cylindrical, have smaller cross-sections than the second portions  30 ,  36 , which may be cylindrical, spherical or the like. The rod  10  cooperates with the sleeves  12 ,  13  and the expandable engagement members  14 ,  15 , as described hereinbelow. The rod  10  is preferably made of nylon or plastic, but may be formed of other materials.  
         [0030]     The number of pairs of first and second portions in rod  10  corresponds to the number of sleeves. If the rod includes more than one pair of first and second portions, the rod also preferably defines a circumferential groove  32  that is located between the second portion  30  of one pair and the first portion  34  of the next pair. The groove  32  facilitates engagement of the expandable engagement member  14  with the second portion  30  because the groove  32  allows the expandable engagement member  14  to secure around the second portion  30  and, in combination with the first portion  34 , creates resistance in pulling the rod  10  out of sleeves  12 ,  13 , which makes it more difficult for the rod  10  to be inadvertently disengaged from the sleeves  12 ,  13 .  
         [0031]     The circumferential grooves also permit the elongated rods to be adjusted to the correct length by breaking off excess pairs of first and second portions. Thus, elongated rods may be manufactured in one or a few standard lengths, such that installers do not have to decide the exact sizes they will need prior to beginning installation. The installers may instead break the rods at the circumferential grooves between the pairs of first and second portions to obtain a rod of appropriate length at the time of installation. For example, in  FIG. 1 , an elongated rod with three or more pairs of first and second portions may have been adjusted to two pairs by breaking the rod at a circumferential groove below the second portion  36  to create rod  10 .  
         [0032]     The sleeves  12 ,  13  may be hollow cylinders extending between opposed ends. The sleeves generally include annular segments proximate the opposed ends that define respective openings  38 ,  39 ,  11 ,  21 . These openings are typically smaller than the cylindrical opening defined by the medial portion of the sleeves. In addition, the sleeves  12 ,  13  carry an attachment element to which a cable or cables may be attached, for example, cable attachments such as cable ties may be used to attach the cables to the attachment element(s). While the quick release support post will be described in terms of its attachment to cables, cables is intended to include any of a wide variety of elongated members, including wires, optical fibers, optical ribbons and the like. The attachment elements may be any type of element capable of receiving a cable attachment. For example, in the embodiment of  FIG. 1 , the attachment elements are rings  16 ,  17  that have openings larger than the sleeves  12 ,  13 , and the rings  16 ,  17  may be attached to the sleeves  12 ,  13  with two or more spokes  18 ,  19  that extend inwardly from the rings  16 ,  17  to the sleeves  12 ,  13 . The sleeves  12 ,  13 , including the attachment elements, are preferably made of a high strength material, such as nylon.  
         [0033]     The expandable engagement members  14 ,  15  may have upper portions  40 ,  41  defining holes  46 ,  47 , respectively, that extend therethrough. The outer edges of the upper portions  40 ,  41  may be any shape, but the upper portions  40 ,  41  are slightly smaller than the interior openings in the sleeves  12 ,  13 , and larger than the openings  11 ,  21  in the annular segments of the sleeves  12 ,  13 . In addition, the expandable engagement members  14 ,  15  have a plurality of arms  44 ,  45 , the nominal circumferences of which are slightly larger than the openings  11 ,  21  in the annular segments of the sleeves  12 ,  13 . The arms  44 ,  45  extend outward from the upper portion of the respective engagement member, but are separated from one another by slits between the adjacent arms. As such, the arms permit some inward and outward radial movement when subjected to appropriate pressure. The arms  44 ,  45  are arranged to define a longitudinally extending opening that is aligned with the hole defined by the upper portion of the respective engagement member. The hole defined by the upper portion of an engagement member and generally the opening defined by those portions of the arms proximate the upper portion of the respective engagement member are larger in cross-section, i.e., diameter, than at least the opening defined by the distal portions of the arms  44 ,  45 . Thus, the second portions  30 ,  36  of the rod  10  may fit somewhat loosely within the hole defined by the upper portion of the engagement member and the portion of the arms proximate the upper portion of the respective engagement member while in the first position, as described below. The second portions  30 ,  36 , however, are at least slightly larger than the opening defined by the distal portions of the arms  44 ,  45 , such that movement of the rod  10  relative to the engagement members  14 ,  15  to the second position, in which the distal ends of the arms are positioned around the second portions of the rod, causes the arms  44 ,  45  to be deflected radially outward. The expandable engagement members  14 ,  15  also define outwardly opening circumferential grooves  42 ,  43  between the upper portions  40 ,  41  and the arms  44 ,  45  for engaging the annular segment of a respective sleeve, as described below. The expandable attachment members  14 ,  15  are also preferably of made a high strength material, such as nylon.  
         [0034]     In this embodiment, the expandable engagement members  14 ,  15  are placed inside sleeves  12 ,  13  during fabrication of the sleeves  12 ,  13 . As such, the arms  44 ,  45  may be pushed through the lower segment openings  11 ,  21  in the sleeves  12 ,  13 . The extension of the distal portions of the arms may be tapered radially inward to facilitate insertion through the openings  11 ,  21 , which in turn forces the arms  44 ,  45  to move closer together as they move through the openings  11 ,  21 . Once the arms  44 ,  45  get through the openings  11 ,  21  the arms  44 ,  45  return to their normal state, which is slightly larger than openings  11 ,  21 , thereby capturing the annular segment between the arms  44 ,  45  and the larger upper portion  40 ,  41  of the engagement member. In particular, the annular segments of the sleeves  12 ,  13  generally rest in the circumferential grooves  42 ,  43  of the expandable engagement members  14 ,  15 . The fabrication of the sleeves  12 ,  13 , may then be completed.  
         [0035]     In an alternative embodiment, the expandable engagement members  14 ,  15  and the sleeves  12 ,  13  may be fabricated in one piece. As such, the arms  44 ,  45  surround and extend from the openings  11 ,  21  in the lower segments of the sleeves  12 ,  13 . In this embodiment, the sleeve and arms are also preferably made of a high strength material, such as nylon.  
         [0036]      FIG. 2  is a cross-sectional view that illustrates the sleeves  12 ,  13  mounted in a first position on the rod  10 . In this embodiment, sleeves  12  and  13  are longitudinally aligned such that the arms  44  may be inserted into the opening  39  defined by the upper segment of sleeve  13 . Slight pressure applied to sleeve  12  in the direction of sleeve  13  and/or slight pressure applied to sleeve  13  in the direction of sleeve  12  causes the annular segment to force the arms  44  inward as the arms  44  move through opening  39 . Once the arms  44  are completely inserted into sleeve  13 , the arms return to their normal position, which is larger than the opening  39  defined by the annular segment and serves to hold sleeves  12  and  13  together. More sleeves may be joined to sleeves  12  and  13 , if desired, in the same manner as described above. The rod  10  then may be inserted into the opening  38  in the annular segment of sleeve  12  and extended through sleeves  12  and  13  to arrive at the first position, as shown in  FIG. 2 . In the first position, the second portions  30 ,  36  of the rod  10  are within the part of the arms  44 ,  45  proximate the respective sleeve and/or the hole defined by the upper portion of the respective engagement member. Additionally, the first portion  34  of the rod  10  is positioned within the distal portion of the arms  44 , and the distal portion of the arms  45  is empty, such that the arms  44 ,  45  are not radially expanded in the first position. Thus, the lengths of the first and second portions must be such that the respective portions are within the appropriate parts of the respective arms in the first position.  
         [0037]     Whether there is one sleeve, or more than one sleeve joined together as described above, sleeve  13  may be longitudinally aligned with the hole  22  in structure  20  such that the arms  45  may be inserted into the hole  22 , as shown in  FIG. 2 . In addition, the rod may be in the first position with respect to the sleeve or sleeves during insertion into the hole  22 , or sleeve  13  may be inserted in hole  22  prior to insertion of the rod in the sleeve or sleeves. To insert sleeve  13  into the hole  22 , slight pressure may be applied to sleeve  13  in the direction of the hole  22 , which causes arms  45  to be forced radially inward as the arms  45  move through the hole  22 . Once the arms  45  are completely inserted into hole  22 , the arms  45  return to their normal position, which at least temporarily holds sleeve  13  to the structure  20 .  
         [0038]     Once the engagement members have been inserted, either into the opening defined by the annular segment of another sleeve or a hole defined by the structure, the rod is moved to the second position.  FIG. 3  is the cross-section of the sleeves  12 ,  13  and the rod  10  in the second position, such that the sleeves are securely engaged to each other and the structure  20 . To arrive at the second position, pressure is applied to rod  10 , which is in the first position, to urge the rod  10  toward the structure  20 . The sleeves  12 ,  13  are axially translated along the rod  10  until rod  10  is fully inserted in the sleeves. Preferably, the handle base  26  is within opening  38  of the sleeve  12  and the handle  24  is butted against the upper segment of the sleeve  12 , such that the rod  10  may not be moved laterally when it is in the second position. In addition, the distal ends of the arms  44  now surround respective second portions  30 ,  36  of rod  10  when the rod  10  and sleeves  12 ,  13  are in the second position. Because the opening defined by the distal ends of the arms  44 ,  45  is smaller, the second portions  30 ,  36  force the arms  44 ,  45  to expand, which positively engages sleeve  12  to sleeve  13  and sleeve  13  to structure  20 . Thus, in the second position, the sleeves  12  and  13  and the rod  10  form a support post  48  that is positively engaged to structure  20 .  
         [0039]     To remove the support post  48  from the structure  20 , pressure may be applied to rod  10  in the direction opposite the structure  20 . The amount of pressure necessary to move the rod  10  and sleeves  12 ,  13  from the second position to the first position should be enough to ensure that the normal pressures to which the support posts are subjected are not enough to force the rod  10  and sleeves  12 ,  13  to disengage from the structure  20 , but not so much that a tool is needed to move the rod  10  and sleeves  12 ,  13  to the first position. Once the rod  10  and sleeves  12 ,  13  are in the first position, slight pressure may be applied to sleeve  13  in the direction opposite the structure  20 , which will force the arms  45  inward as the arms  45  move through the hole  22  and the support post is disengaged from the structure  20 . The process of easily moving the rod and sleeves from the second position to the first position may be referred to as the quick release functionality of the support posts of the present invention. To separate sleeve  12  from sleeve  13 , the rod  10  is removed from the sleeves  12 ,  13  by applying pressure to the rod  10  in the direction opposite the sleeves. Once the rod  10  is removed from the sleeves  12 ,  13 , the sleeves may be disengaged by applying pressure to each sleeve in the direction opposite the other sleeve and forcing the arms  44  inward as they move through opening  39  in sleeve  13 .  
         [0040]     The hole  22  in the structure  22  must have a circumference slightly smaller than the circumference of the arms  45  in the normal position, but large enough to allow the arms  45  to move through the hole  22  when the arms are forced slightly inward. The structure  20  may be made of any type of structural material, but is typically metal, plastic, composite or the like. If the material is unyielding throughout its depth, the depth of the material must be such that the arms  45  may expand on the blind side of the structure  20  that is opposite the side from which the post is inserted. If the material is such that the arms  45  may expand within the hole  22  in the material, then there is no limit on the depth of the material. An example of this type of material is a honeycomb-type material, such as aramid paper with thin front and back face sheets made of composite material, which is a high strength material made of fibers, such as graphite fibers, and resin, such as epoxy resin. This type of material construction is frequently used in the interior of aircraft because it is lightweight and high strength.  
         [0041]     Because installation of the sleeves and rods that form the support posts only requires holes in the structure, the structural designers may determine how many holes, support posts, and cables the structure may carry before the structural integrity is compromised. As such, holes may be pre-drilled in structures in areas where cables are most likely to run and the installers may easily move the support posts to other holes or add supports posts, if necessary. This is a significant improvement over the conventional clamps that required compound and steel inserts in the structure, which increased the weight of the structure, and, as such, the structure would have to be redesigned and fabricated in order to move the clamps or add clamps. The simple movement and installation process for the support posts of the present invention is also much less time-consuming, less labor intensive and less expensive than the conventional installation and movement process that required compound, steel inserts, and possibly a new structure to move or add conventional cable clamps.  
         [0042]      FIG. 4  depicts the manner in which cables may be tied to the support posts according to one embodiment of the apparatus and method of the present invention.  FIG. 4  also illustrates a support post  49  with one sleeve in addition to the support post  48  with two sleeves and how they may be utilized together. Once the support posts are mounted to the structure  20 , a cable or cables  50  may be tied or otherwise connected to the attachment elements  16 ,  17  and  60  of sleeves  12 ,  13  and  56 , respectively.  
         [0043]     The cables  50  may be tied to the attachment elements  16 ,  17  and  60  with any type of tie member. For example, in  FIG. 4 , a basic cable tie in which one end may be received by the other end, such that the tie may be adjusted to the exact size necessary to secure the cables, is used to tie the cables  50  to the attachment elements  16 ,  17 , and  60 . Once this type of cable tie is adjusted to the correct circumference, it cannot be readjusted to a larger circumference. To remove this type of cable tie, it must be cut with a cutting tool. While various types of cable ties known to those skilled in the art may be utilized, one example of a cable tie is the PLT.6SM-C cable tie made by Panduit Corporation.  
         [0044]     As  FIG. 4  illustrates, a cable tie  52  may be threaded between the attachment elements  16 ,  17  and the sleeves  12 ,  13 , respectively, and may be tightened around the cables  50  to secure the cables  50  to the support post  48 . Alternatively, the cable tie  52  may be threaded between the attachment element  16  and the sleeve  12 , or between the attachment element  17  and sleeve  13 , and tightened around the cables  50  to secure the cables  50  to one sleeve of the support post  48 . This embodiment may be advantageous for cable management purposes, such that all cables of one type may be secured to one sleeve and all cables of another types may be secured to another sleeve. Similarly, a cable tie  64  may be threaded between the attachment element  60  and the sleeve  56 , and may be tightened around the cables  50  to secure the cables  50  to the support post  49 .  
         [0045]     Thus, the support posts of the apparatus and method of the present invention provide an efficient, easy, secure and safe way to attach cables to structures. The support posts may have varying lengths, depending upon the application or environment of the posts, and the support posts allow installers to take advantage of effective cable management techniques that were not possible with the conventional cable clamps. Furthermore, because extra tools or other materials are not necessary to install the support posts, the installation process is less labor intensive, less expensive and less time-consuming, particularly in hard-to-reach areas, than the conventional installation process that required compound and steel inserts be placed in the hole in the structure before the cable clamp could be installed with a fastener and a tool. The quick release functionality of the support posts of the present invention also provides an easy manner in which the support posts and the cables tied to the posts may be moved to a different area of the structure. In addition, if only part of the cables must be moved, the cables can easily be released from the ties to the support posts and another support post may be quickly installed in the area where those cables are to be moved.  
         [0046]     An embodiment of a quick release cable clamp of the present invention is illustrated in  FIG. 5 . The quick release cable clamp includes a pin  70 , an expandable engagement member  72 , and a clamp element  74 . To install the quick release cable clamp in a structure  78 , a hole  76  must be drilled in the structure  78 . The hole  76  has a circumference that is slightly smaller than the outer circumference of the arms  92  of the expandable engagement member  72 , but slightly larger than the circumference of the second portion  84  of the pin. The structure may be any type of structural material, the details of which are the same as described hereinabove for the quick release support post.  
         [0047]     The pin  70  has a handle  80 , a first portion  82 , and a second portion  84  having a larger cross-section than the first portion  82 . The first portion  82  be cylindrical and the second portion  84  may be cylindrical or spherical or the like. The pin  70  cooperates with the expandable engagement member  72 , as described hereinbelow The pin  70  is preferably made of a high strength material, such as nylon, or durable plastic, but may be formed of other materials.  
         [0048]     The expandable engagement member  72  has an upper portion  88 , a groove  90 , a plurality of arms  92 , and defines an opening  86  there through. The outer edge of the upper portion  88  may be any shape, but is typically slightly smaller than the area of first arm  94  around the opening  98  defined by the clamp element  74 . The length of the groove  90  corresponds to or is slightly longer than the depth of the first arm  94  of the clamp element  74 , such that when the expandable engagement member  72  is inserted through opening  98 , the opening  98  is aligned with the groove  90 , which attaches the expandable engagement member  72  to the first arm  94 .  
         [0049]     The arms  92  extend from the groove  90  in the direction opposite the upper portion  88  and have a circumference larger than the circumference of the groove  90 . The arms  92  are separated from one another by slits between adjacent arms. As such, the arms  92  permit some inward and outward radial movement when subjected to appropriate pressure. The arms  92  are arranged to define a longitudinally extending opening that is aligned with the hole  86  defined by the upper portion  88  of the engagement member  72 . The opening defined by those portions of the arms  92  proximate the upper portion  88  are larger in cross-section, i.e., diameter, than at least the opening defined by the distal portions of the arms  92 . Thus, the second portion  84  of the rod  70  may fit somewhat loosely within the hole defined by the upper portion  88  of the engagement member  72  while in the first position, as described below, but are at least slightly larger than the opening defined by the distal portions of the arms  92 . As such, movement of the rod  70  relative to the engagement member  72  to the second position in which the distal ends of the arms  92  are positioned around the second portion  84  of the rod  70  causes the arms to be deflected radially outward.  
         [0050]     The circumference of the opening  86  through the upper portion  88  and the grove portion  90  may correspond to the circumference of the first portion  82  of the pin  70 , such that the first portion  82  may slide through the upper portion  88  and grove portion  90  without removing the pin  70  from the expandable engagement member  72  because the handle  80  and second portion  84  are larger than this part of the opening  86 . Thus, the pin  70  and expandable engagement element  72  are preferably fabricated simultaneously in this embodiment because the pin  70  may not be inserted or removed from the expandable engagement element  72 . The expandable engagement member is preferably made of a high strength material, such as nylon.  
         [0051]     The clamp element  74  has a first arm  94  that defines an opening  98 , a second arm  96  that defines an opening  100 , and a loop portion  102  that defines an opening  104 . The first and second arms  94 ,  96  may be similar in shape and are at least long enough to accommodate the upper portion  88  of the expandable engagement member  72  and the handle  80  of the pin  70 . The first and second arms  94 ,  96  are also capable of being stacked, such that the openings  98  and  100  may be aligned. The opening  98 , as described above, is aligned with the groove  90  of the expandable engagement member  72  and, as such, has a circumference slightly larger than the circumference of the groove  90 . The opening  100  is aligned with the part of the arms  92  proximate the upper portion  88  and, as such, has a circumference slightly larger than the outer circumference of the part of the arms  92  proximate the upper portion  88 . Thus, the opening  100  has a larger circumference than the opening  98 .  
         [0052]     The loop portion  102  may attach to the arms or continuously extend from the arms, such that when the arms are stacked, the cross-section of the clamp element  74  is P-shaped. While the quick release cable clamp will be described in terms of its attachment to cables, cables is intended to include any of a wide variety of elongate members including wires, optical fibers, optical ribbons and the like. The loop portion  102  defines an opening  104  that is large enough to receive a cable or cables. There may be many different sizes of loop portions  102  to accommodate different size cables or cable bundles. Alternatively, a filler material may be added within the loop portion  102  if the loop portion is too large to tightly secure the cable or cables. The clamp element  74  of the quick release cable clamp of the present invention is preferably made of a high strength material, such as nylon, that is thick enough to withstand the weight of the cables and the various forces to which the cables, structure and clamp will be subjected, such as vibrational, shock, or acoustic forces. In addition, the loop portion  102  of the cable clamp should not have multiple holes and should fit snuggly around the cables to prevent the loop portion  102  from breaking or from damaging the cables by rubbing loose cables during vibrations or other forces that may cause loose cables to move in the loop portion  102 . Thus, the cable clamp of the present invention is advantageous over conventional quick release cable straps that have many holes in the loop portion since they are adjustable and may not be securely tightened around the cable(s).  
         [0053]     In an alternative embodiment, the arms  92  may extend from the side of the first arm  94  that faces the second arm  96 , such that a separate expandable engagement member  72  is not necessary. In this embodiment, the opening  98  would be aligned with the first portion  82  of the pin  70 , such that the first portion  82 , but not the second portion  84  or the handle  80 , may slide though the opening  98 . Thus, the pin  70  and clamp element  74  would preferably be fabricated simultaneously because the pin  70  may not be inserted or removed from the opening  98 .  
         [0054]      FIG. 6  illustrates a cross-section of the pin  70  and the clamp element  74  in a first position. In the first position, the second portion  84  of the pin  70  is within the part of the arms  92  proximate the upper portion  88  of the expandable engagement member  72 , such that the arms  92  are not expanded. At this point, the cable or cables may be received by the opening  104  defined by the loop portion  102 , and the second arm  96  is placed on the structure  78  so that the opening  100  is aligned with the hole  76 .  
         [0055]      FIG. 7  is a cross-section of the quick release cable clamp in the second position. The second position occurs when the pin  70  is fully inserted in the arms  92 , such that the second portion  84  of the pin  70  is in the distal portion of the arms  92 , which causes the arms  92  to expand. Thus, while in the first position, the arms  92  are extended through the opening  100  defined by the second arm  96  and through the hole  76  defined by the structure  78 , such that the first arm  94  and the second arm  96  are in contact with each other. Pressure is then applied to the handle  80  of the pin  70  in the direction of the structure  78  to push the second portion  84  into the distal portion of the arms  92 . The expanded arms  92  have a larger circumference than the hole  76  and the cable clamp is positively engaged within hole  76 . Additionally, securely fastening the arms of the cable clamp together causes the loop portion  102  to tightly surround the cable(s) and the cable(s) are then securely attached to the structure  78  via the cable clamp.  FIG. 8  illustrates a cable  106  securely attached to the structure  78  within the loop portion  102  of a cable clamp that is positively engaged within the hole  76  defined by the structure  78 .  
         [0056]     In addition to the advantage of installing the cable clamp of the present invention without tools or other materials, the quick release functionality of the cable clamp is advantageous when the clamp must be removed or moved to a different area of the structure. To release the cable clamp from the structure  78 , pressure may be applied to pin  70  in the direction opposite the structure  78 . The amount of pressure necessary to move the pin  70  and clamp element  74  from the second position to the first position should be enough to ensure that the normal pressures to which the cable clamps are subjected are not enough to force the pin  70  and clamp element  74  to disengage from the structure  78 , but not so much that a tool is needed to move the pin  70  and cable element  74  to the first position. Once the pin  70  and clamp element  74  are in the first position, the arms  92  are no longer expanded and the arms  92  may be moved out of the hole  76  and the cable clamp is disengaged from the structure  78 . The process of easily moving the pin and cable element from the second position to the first position may be referred to as the quick release functionality of the cable clamp of the present invention.  
         [0057]     Because installation of the cable clamps only requires holes in the structure, the structural designers may determine how many holes, support posts, and cables the structure may carry before the structural integrity is compromised. As such, holes may be pre-drilled in structures in areas where cables are most likely to run and the installers may easily move the cable clamps to other holes or add cable clamps, if necessary. This is a significant improvement over the conventional clamps that required compound and steel inserts in the structure, which increased the weight of the structure, and, as such, the structure would have to be redesigned and fabricated in order to move the clamps or add clamps. The simple movement and installation process for the cable clamps of the present invention is also much less time-consuming, less labor intensive and less expensive than the conventional installation and movement process that required compound, steel inserts, and possibly a new structure to move or add conventional cable clamps.  
         [0058]     Many modifications and other embodiments of the invention will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the invention is not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.