Abstract:
A device for supporting wire bundles which pass through an opening of a structural element such as the tracks of an airplane slat. The device includes an inside spacer element which both supports and spaces apart the individual wire bundles. The spacer is supported within a hollow split bolt which is formed by two half cylinders which are held together by detachable connectors as well as by a split locking nut which is screwed onto a threaded end of the split bolt. The nut is also formed by the joining of two half nuts which are held together by detachable connectors. In this manner, the supporter can be installed around wire bundles which are already in place through the structure opening.

Description:
TECHNICAL FIELD 
     The present invention pertains to a device for supporting within a structural component one or more wire bundles which are fed through an opening in the structural component. 
     BACKGROUND OF THE INVENTION 
     In certain equipment it is necessary to feed bundles of wires to different operating components. Often there will be openings within the structure of this equipment through which the wire bundles are fed and supported. However, due to movement and vibration within the equipment, it is necessary to support the wire bundles. This is necessary to prevent fraying of the wire insulation and exposure of the wire which could result if the bundles were allowed to chafe against the equipment&#39;s structure. 
     In commercial aircraft, for example, wire bundles are fed outboard from the fuselage through the wing. These wire bundles carry signals between various control devices in the fuselage and wing mounted systems such as engines, flaps and slats. However to reach these operating systems, the bundles must be fed through openings in wing ribs, support tracks and the like. Furthermore, to prevent the wire bundles from chafing due to vibration and movement of the wing, the wire bundles have traditionally been supported by &#34;P&#34; clamps which in turn are fastened to the aircraft structure. 
     Using this conventional method, each wire bundle must be supported by a separate P clamp so as to provide spacing between the wire bundles as well as between the wire bundles and the airplane structure. Sometimes there are as many as six wire bundles which must be fed through a single opening and which must be supported by six separate P clamps. Due to the large number of P clamps required, it is sometimes necessary that the hole have an oblong configuration in order to accomodate all of the wire bundles. This reduces the overall strength of the structure. Furthermore it is time consuming to attach individual P clamps around each wire bundle and to fasten each of the P clamps to the aircraft structure. 
     This conventional method is particularly burdensome when it becomes necessary to support the wire bundles within openings in the airplane slat support tracks. Typically, these tracks are very close together, sometimes only about two inches apart. 
     A number of conventional support devices have been disclosed. For example, in U.S. Pat. No. 730,251 by Gibbs there is disclosed a sheath having &#34;+&#34; shaped elements therein for supporting electrical wire. Furthermore, U.S. Pat. No. 919,913 by Miller discloses a pipe connector including a threaded divided gland which is inserted inside a threaded recess of a connecting part and which grasps a portion of the pipe. 
     SUMMARY OF THE INVENTION 
     The present invention pertains to apparatus and methods for supporting a wire element through an opening in a structure. The apparatus includes means, such as a spacer element, for engaging the wire element to resist movement thereof. In addition, the apparatus includes a bolt which is inserted into the structure opening. The bolt has (i) a head portion which engages the structure and (ii) a shaft portion including an internal passageway which supports the wire engaging means, e.g., spacer element, therein such that the bolt engages the wire engaging means. Furthermore, there is a nut which is attached to the bolt in a manner that the nut engages the structure to secure the apparatus to the structure between the nut and the head portion. In addition, the nut engages the wire engaging means to secure the wire engaging means inside the passageway between the nut and the bolt. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     These and other features and advantages of the present invention will be described in the following detailed description in conjunction with the attached drawings, in which: 
     FIG. 1 is a perspective view of four wire bundles which are supported by conventional P clamps; 
     FIG. 2 is a perspective view of four conventional P clamps which are attached to aircraft structure by conventional L flanges; 
     FIG. 3 is a top view of an exemplary embodiment of the present invention; 
     FIG. 4 is an exploded view of the present embodiment; 
     FIG. 5 is a perspective view of the present embodiment; 
     FIG. 6 is a sectional end view of the present embodiment taken along line 6--6 of FIG. 5; 
     FIG. 7 is a side view of a portion of the present embodiment in a disconnected position; and 
     FIG. 8 is a side view of the portion of the present embodiment shown in FIG. 7 in a connected position. 
    
    
     DETAILED DESCRIPTION 
     The present invention pertains to an apparatus and method for supporting one or more wire-like bundles within an opening in a structure. In the present detailed description, an exemplary embodiment of the present invention will be described wherein the present invention is used to support wire bundles within an opening in a slat support track of an airplane. It should be appreciated, however, that the present invention is not limited to the exemplary embodiment described in this detailed description. 
     Before describing the present invention in further detail, an additional brief description of the conventional P clamp method introduced in the Background of the Invention will be provided. Referring first to FIG. 1, there is shown a number of wire bundles B each of which is supported by a respective &#34;P&#34; clamp designated by the letter P. Located at the base of each P clamp are a pair of openings O through which a fastener screw (not shown) is inserted. In order to fasten the P clamps to aircraft structure, each P clamp is fastened (through openings O) to a respective L flange (designated by the letter L in FIG. 2). In turn, the respective L flanges are fastened by fasteners F to the aircraft structure (designated by the letter S), such as an aircraft slat track. 
     Having discussed the foregoing conventional method, attention now will be turned to the present invention. Referring first to FIGS. 3 and 5, there is shown a cable/wire feed-through supporter indicated at 20 which supports wire/cable bundles B through openings in a slat track T which includes vertical track beams V. As shown more clearly in FIG. 4, the supporter 20 includes an inner spacer star 22, a hollow split bolt 24, and a hexagonal split nut 26. Furthermore, the hollow split bolt 24 includes two mirror image half bolts 24&#39;, 24&#34; which when joined together form a cylindrical shaft portion having a cylindrical internal passageway 25. The shaft portion is threaded at an end 28 (FIG. 3) and attached at its opposite end to a hexagonal-shaped head portion 27. Likewise, the hexagonal split nut 26 is formed by two mirror image elements 26&#39;, 26&#34; each having a circular threaded inner surface. 
     The spacer star 22 includes a number of V-shaped valleys 30, each of which supports one wire bundle B. During installation, typically the wire bundles B are first fed through the openings in the track beam V. Following this, the spacer star 22 is slid into a track beam opening in a manner that there is only one wire bundle B per valley 30. Once this is accomplished, the half bolts 24&#39;, 24&#34; are mated together (in a manner to be described later) about the wire bundle at the right side of the track beam V (in FIG. 3) and slid into the track beam opening from the right to the left. Following this, the half nuts 26&#39;, 26&#34; are mated together about the wire bundles at the left side of the track beam V and screwed onto the threaded end 28 of the hollow bolt 24 until the nut 26 and the head 27 of the bolt engage respective left, right track beams V in an interference fit. In this manner, the feed-through supporter 20 is held in place on the track. 
     In order to describe the present invention in more detail, reference is made to FIG. 4 which shows an exemplary embodiment of the spacer star 22 formed by a number of rectangular panels 34 which are connected together at each of their respective lengthwise edges to define a centerline 36. Each of the panels&#39; opposite lengthwise edges 38 are spaced laterally apart at generally equal intervals so as to form the valleys 30 therebetween. In order to receive a retainer wire (not shown) for holding the wire bundles firmly within the valleys 30, notches 39 are provided along the edges 38 of the panels. The retainer wire is wrapped circumferentially around the spacer star 22 at the notches 39 to engage the wire bundles therein. It should be appreciated that other shapes of spacers may be used, depending upon, for example, the number of wire bundles which are required to be separated and supported. 
     Still referring to FIG. 4, the half bolt 24&#39; includes an upper lengthwise edge 40 and a lower lengthwise edge 42. Projecting from the edge 40 at the head 27 is a male connector 44 having a neck 46 to which there is attached an oval body 48. As shown more clearly in FIG. 5, the half bolts 24&#39;, 24&#34; are joined together by inserting the male connector 44 into a female receptacle 52 which is located in an upper edge 54 (at the head 27&#34;) of the half bolt 24&#34;. More specifically, the receptacle 52 (FIG. 7 and 8) includes an oval slot 55 which receives the oval body 48 of the male connector therein. Furthermore, the oval slot 55 communicates with the edge 54 through a small channel 56 which receives the connector neck 46 therein. 
     In order to hold both edges of each half bolt together, the bottom edge 42 of half cylinder 24&#39; (at the head 27) includes a female receptacle 60 which is identical to the receptacle 52. In addition, a bottom lengthwise edge 62 of the half bolt 24&#34; includes a male connector 64 at the head 27&#34; which is identical to the male connector 44. When the half bolts 24&#39;, 24&#34; are joined together, the male connector 64 is positioned inside the female receptacle 60. 
     In order to hold the male connectors 44, 64 within the respective receptacles 52, 60, the nut 26 is screwed over the threaded portion 28 of the bolt. However, prior to this, the half nut 26&#39; is joined with the half nut 26&#34;. As shown in FIG. 4, the half nut 26&#39; includes an upper end face 70 and a lower end face 72 whereas the half nut 26&#34; includes an upper end face 74 and a lower end face 76. Attached to the upper end face 70 and the lower end face 76 are respective male connectors 78, 80 which are identical to the connector 44. In addition, located in the end faces 72, 74 are respective slots 84, 86 which are identical to the slot 52. When the half nuts 26&#39;, 26&#34; are joined together, connectors 78, 80 are positioned inside slots 86, 84 respectively. 
     Until the locking nut 26 is screwed onto the bolt 24, the half nuts and half bolts are manually held together to prevent the male connectors from sliding vertically out of the female receptacles. However, once the locking nut 26 is screwed onto the bolt 24, vertical movement of the half nuts relative to each other and the half bolts relative to each other is prevented. In this manner, the various components of the supporter 20 are held in place. 
     In another exemplary embodiment, a number of retaining grooves 90 are located in the head 27 and locking nut 26 for receiving therein a snap ring (not shown) or lock wire 89 (FIG. 6). 
     As shown most clearly in FIG. 3, the locking nut 26 is screwed onto the bolt 24 until an inner face (not shown) of the locking nut engages an outer face F&#39; of the left vertical beam V&#39; and until an inner face of the bolt head 27 engages an outer face F&#34; of the right vertical beam V&#34;. 
     As shown best by FIG. 6, the wire bundles are spaced apart yet held securely by the supporter 20. More specifically, the spacer 22 is configured so that each wire bundle B is held securely between the panels 34 and an inner surface 91 of the bolt passageway. The spacer 22 is held within the passageway 25 between (i) an upstanding lip 92 (FIG. 4) which extends about the inner circumference of the nut 26 at the left end thereof and (ii) an upstanding lip 94 which extends about the inner circumference of the bolt head 27 at the right end thereof. 
     It should be appreciated that the supporter 20 can be installed around wire bundles which are already in place and without having to thread the bundles through the supporter. On the other hand, the supporter 20 can be installed first in the structure opening and the wire bundles fed through the supporter.