A floor section assembly having a post anchor built into one of the floor panels for use with portable sectionalized flooring suitable for a volleyball court or the like is disclosed. The post anchor includes a base assembly attached to the undersurface of one of the panels and is coupled to a plurality of adjacent panels by tubes attached to the undersurface of the panels and coupled together by a rigid member extending through aligned tubes. This structure provides a broad base of support for the post carrying a volleyball net which can absorb moments placed on the post without the need for connecting the post to the base on which the flooring is assembled.

This is a continuation-in-part of application Ser. No. 228,744, filed on Aug. 5, 1988, still pending. 
    
    
     TECHNICAL FIELD 
     This invention relates to the flooring art and more particularly to a portable floor section having a built-in post anchor for use with portable sectionalized flooring suitable for a volleyball court or other flooring requiring post support. 
     BACKGROUND OF THE INVENTION 
     Special flooring systems for indoor and outdoor sports activities, dancing and other like uses have been proposed in the prior art. Among the drawbacks of many prior art floors are their high initial cost, permanency of installation and the fact that they must be made and installed at the flooring site rather than being fabricated and carried to the desired assembly location. 
     Furthermore, there are many environments and applications where permanent installation of a sports activity type of floor is not dictated or justified. Some locations may require that the sports activity type flooring be removable such that the location is susceptible to utilization for purposes other than sports activities or for a variety of sports activities. Portable sectionalized flooring such as that disclosed in U.S. Pat. No. 4,538,392 have been used to provide this adaptability. 
     However, floors suitable for sports activities such as volleyball or the like present special problems in requiring post anchors to firmly support posts which in turn support a net. The post anchors should be capable of countering the moment developed by the net through each post so that the vertically upright position of each post remains true. 
     The problems in meeting these flooring anchor requirements are exacerbated when attempts have been made to associate such anchors with floors in a portable and/or sectionalized form of construction. Prior art attempts to achieve anchor stability require securing an anchor base to the permanent flooring beneath the portable sectionalized flooring system. A further problem is that the anchor base must be aligned with the volleyball center line. Consequently, the prior art installation requires laying portable floor panels after drilling anchor base holes into the permanent subflooring so that the anchor base can be aligned with the volleyball center line of the portable sectionalized flooring. Such a prior art system also calls for building a dummy panel to fit over the installed anchor base to assist in the designing of a sectionalized flooring panel so that the volleyball net post may pass through the sectionalized flooring panel and into the anchor base. Among the drawbacks of such a prior art system are high installation costs, increased set up time, necessary fabrication at the flooring site and difficulty in repositioning the volleyball net since new holes would have to be drilled into the subflooring. Furthermore, where these prior art sectionalized floors must be repeatedly put down and taken up before and after successive sports activities, the separate parts required for the assembly of such volleyball post anchor systems may be easily lost or misplaced while the floor sections are in their disassembled state of non-use or in storage. 
     SUMMARY OF THE INVENTION 
     In view of the above and other deficiencies of the known prior art, it is the aim of this invention to provide a prefabricated floor section having a post anchor built therein for use with portable sectionalized flooring suitable for a volleyball court or the like which can be quickly assembled and installed in a variety of environments, and which does not require connection of the post or its support base to the subfloor. 
     Thus, the invention involves a first floor section having a post anchor base built therein and secured to the undersurface thereof. Floor sections to be installed adjacent to the first floor section have stabilizing base extensions, in the form of pairs of hollow tubes, secured to their respective undersurfaces. The anchor base and base extensions have securing mechanisms, in the form of an elongated rigid member passing through aligned hollow tubes, for coupling the base extensions on adjacent floor sections to one another. When these floor sections are assembled, the base extends well beyond the first floor section thereby providing the requisite post anchor stability without securing the post anchor to the flooring beneath the portable sectionalized flooring. 
     It is an object of the present invention to provide portable sectionalized flooring suitable for a volleyball court or the like with prefabricated post anchors built therein to enable fast set up time for any game. 
     It is another object of the present invention to provide a fully portable volleyball floor with built in post anchors to enable quick and simple disassembly and storage. 
     It is a further object of the present invention to provide a fully portable volleyball floor with post anchors which has post stability without requiring any permanent anchor structure in the subfloor or drilling of post anchor holes in the subfloor, thereby reducing installation costs. 
     It is yet another object of this invention to provide portable sectionalized flooring having panels with built in post anchors thereby eliminating the problems of aligning the panel post hole with the anchor base hole or aligning the anchor base post hole with the volleyball court center line. 
     It is still another object of the present invention to provide a prefabricated floor section with a post anchor built therein that is constructed to minimize the angle to which the post therefor may deviate from the vertical. 
     It is still a further object of the present invention to provide a volleyball post anchor base assembly and post therefore in an apparatus or kit form, for readily converting or adapting an existing portable sectionalized flooring for use as a volleyball court or the like with all of the advantages enumerated above. 
     Other important features and advantages of the invention will be apparent from the following description and the accompanying drawings, wherein for purposes of illustration only, a specific form of the invention is set forth in detail. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a plan view of an assembled sectionalized flooring system in accordance with the invention displaying appropriate markings for a basketball court and the post anchor base in phantom along the court center line; 
     FIG. 2 is an enlarged plan view of the post anchor assembly secured to the undersurface of sectionalized flooring panels; 
     FIG. 2a is a plan view similar to FIG. 2 of an alternate embodiment of the post anchor assembly; 
     FIG. 3 is an enlarged plan view of the post anchor assembly and post hole cover therefor from the upper surface of a panel; 
     FIG. 4 is a cross-sectional view of the post anchor assembly secured to the undersurface of a floor panel taken along line 4--4 of FIG. 3; 
     FIG. 5 is a cross-sectional view of a portion of the post anchor assembly taken along line 5--5 of FIG. 4 and further including the post ready to be inserted; 
     FIG. 6 is a cross-sectional view of the post anchor assembly of FIG. 5 with a further post embodiment having a second portion shown in phantom connected to the post anchor; 
     FIG. 7 is an enlarged view of the base of the post with a cross-sectional view of the abutment flange; and 
     FIG. 8 is a cross-sectional view of a portion of the post anchor assembly taken along line 8--8 of FIG. 3 showing the inclination of the tubular post support according to another embodiment of the invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     FIG. 1 depicts an overall plan view of a completed sectionalized flooring system 100 with two post anchor base assemblies 200 shown in phantom. Each post anchor base assembly and post support 204 thereof is aligned along center line 120. As shown in FIG. 1, planar flooring system 100 is appropriately marked to provide the playing surface for a basketball court. However, it should be understood that post anchor base assembly 200 may be used with any portable sectionalized flooring suitable for volleyball or the like, and that such use is not limited, for example, to the playing surface or sectionalized flooring construction of FIG. 1. 
     Sectionalized flooring system 100 is assembled from a plurality of separate floor sections or panels falling into either of two size groups having respectively different lengths. The first group consists of large panels or sections 102 while the second group is made up of small panels or sections 104. For purposes of panel fabrication and subsequent floor assembly at the site, the large sections 102 are preferably 4 feet×8 feet while the small sections are preferably 4 feet×4 feet. As may be easily appreciated from the plan view of the panels shown in FIG. 1, by appropriately positioning large and small sections 102 and 104 in the rows of the flooring area 100, the joints between the ends of the longitudinally aligned sections can effectively be staggered between adjacent rows. Such flooring construction, including panel-to-panel connectors, is described in detail in U.S. Pat. No. 4,538,392 of which the description therein is hereby incorporated herein. Obviously, anchor assembly 200 may be used with portable sectionalized flooring having different dimensions, markings, construction or other different structural characteristics than the flooring described above. 
     FIG. 4 illustrates anchor assembly 200 secured to a post receiving panel 170. The basic construction of each panel includes an upper flooring layer 108 and a lower flooring layer or layer of underlayment 110 which together form a substantially planar member. Upper flooring 108 defines a flooring surface 106, while underlayment 110 defines the panel undersurface (not designated). Each panel also includes a plurality of spaced elevation members 112 which extend transversely along and are attached to the panel undersurface for supporting layers 108 and 110 above a base surface. 
     Post receiving panel 170 further includes post receiving hole 172 and cover plate 210 therefor. In the closed position, cover plate 210 is flush with floor surface 106. FIGS. 3 and 4 may be referred to as illustrating cover plate 210 closed from a top planar and cross-sectional view, respectively. FIGS. 5 and 6 show cover plate 210 in an open position from a cross-sectional view. Referring to FIG. 3, cover plate 210 includes lid 216 pivotally mounted to flat ring 214 by hinge 212. Flat ring 214 is received in a ring shape groove in upper surface 106 and secured to panel 170 by fasteners F. 
     Returning to FIG. 4, post anchor base assembly 200 includes a support plate 202 having a hole therethrough, a hollow tubular post support 204 inserted in the plate hole and secured to plate 202 by weld W or other suitable means, and two pieces of hollow rectangular tubing 206, each extending along the entire width of panel 170. Hollow rectangular tubing 206 is fixedly secured to support plate 202 along opposite edges thereof by suitable means. Tubing 206 is further secured to the undersurface of panel 170 by fasteners F, such as screws, so that the axis of tubular support plate 204 and the center of post panel post hole 172 are substantially aligned. As seen in FIG. 2, support plate 202 also is preferably secured to the undersurface of panel 170 by fasteners F. Referring to FIGS. 4 and 5, it can be seen that diametrically disposed pins P which extend radially into the bore of post support tube 204 are intended to engage with detents D provided in diametrically disposed bayonet type slots 308 of volleyball net post 300 and thereby connect post 300 to post anchor base assembly 200. 
     FIG. 2 shows the full span of anchor base assembly 200 fixedly secured to the undersurface of five floor panels arranged in three rows. The interlocking finger joint between the ends of panels 150 and 160, which are provided with projecting fingers 114, is aligned with the corresponding joint between panels 180 and 190. Obviously, the panel ends may be joined by other suitable means. These joints are staggered with respect to the ends of post receiving panel 170. Therefore, both rectangular tubing members 206 are fixedly secured to post receiving panel 170 while only one rectangular tubing extension 220 is fixedly secured to each remaining panel 150, 160, 180 and 190. After the rectangular tubing is fastened to respective panels by fasteners F, the panels are operatively associated, tubing members 206 for a first pair of tubes which aligns with second and third pairs of tubes formed by tubing extension 220. A solid or hollow rectangular stiffening tube 208, having a length corresponding to approximately three panels widths, is inserted into each channel defined by rectangular tube 206 and one extension tube 220 at each end thereof. Thus, tube 208 not only connects or couples, but stiffens, each group of three tubes which extend over three panel widths, thereby further stabilizing the orientation of tubular post support 204. Such construction enables the post when inserted into the post anchor base assembly to remain substantially in the upright position without the necessity of inserting or otherwise anchoring the post to the subfloor. That is, the construction of anchor assembly 200 results in a support base that extends over an area of three panel widths, and in the preferred embodiment, is connected to five panels. Such an anchor assembly readily absorbs moments placed on the post by a net. 
     An alternate embodiment of support assembly 200 is illustrated in FIG. 2a. This embodiment provides additional stability, particularly in the lengthwise direction of the court, by coupling two additional panels to the assembly. In this embodiment, one additional tubing member 221 is secured to post receiving panel 170, another tubing extension 222 is attached to one longitudinally adjacent panel 171 and an additional tubing extension 222 is attached to the other longitudinally adjacent panel 172. The tubing member 221, which is attached to panel 170 is also preferably attached to support plate 202 and the ends of tubing members 206. Tubing extensions 221, which are attached to panels 171 and 172, preferably, but not necessarily, extend along the entire length of the panels. When panels 171 and 172 are connected to one another, tubing extensions 222 align with tubing member 222. A solid or hollow rectangular stiffening tube 208, having a length corresponding to approximately the total lengths of tubing extensions 222 and tubing member 221, is inserted into the aligned tubing to form an interconnecting structure which rigidly connects three longitudinally adjacent panels to post anchor support plate 202. In this embodiment, since tubing member 221 segments tubing member 206 into four sections, four tubes 208 are used to connect tubing members 206 to tubing extensions 220, rather than the two tubes 208 used in the first embodiment. In the embodiment of FIG. 2a, this additional support structure minimizes anchor base assembly rotation about an axis perpendicular to the length of tubing extension 221 to thus provide additional support in the lengthwise direction of the court. 
     The association between the post and anchor base is best understood from FIGS. 5-7. Referring to FIG. 5, volleyball net post 300 has an annular flange 302 and diametrically disposed bayonet type slots 308. Flange 302 abuts with shelf 205 defined by an end surface of tubular post support 204 and thereby provides a vertical stop and support mechanism. Post receiving hole 172 thus has a first diameter and hollow cylinder 204 has a smaller inner diameter. Alternatively, flange 302 could abut with ring 214 if desired and appropriate dimensional changes made. Slots 308 cooperate with pins P to provide a bayonet fastening mechanism between the post and anchor assembly. 
     FIG. 7 shows the basic construction of flange 302. Substantially inelastic core 306 provides the necessary rigidity for supporting post 300. Resilient casing 304, which may be made from elastomeric materials, encapsulates core 306 and develops a spring bias between pin P and detent D. 
     FIG. 6 depicts a further embodiment of the volleyball post. Posts 303 and 305 form post assembly 301. Post 305 is essentially the same as post 300 but substantially shorter. Securement means for fixing post 303 to post 305 may be advanced through opening 307. 
     Referring to FIG. 8, an alternate embodiment of tubular post support 204' is shown. Support 204' is fixed to support plate 202 so that it is angled toward hinge 212 and therefore angled in a direction transverse to the length of the playing court and away from the center of the court. The amount support 204' is angled is small, preferably approximately two and one-half degrees, and is accomplished by using weld W as a shim on one side of its connection to support plate 202 as shown on the left side of FIG. 8. Accordingly, when post 300 is inserted into post support 204', post 300 initially assumes the same orientation. Therefore, after the panels are assembled to form a volleyball court or the like, each post 300 is inclined away from the center of the court. As a result, when a volleyball net is secured to the posts and tensioned, the net tensioning causes posts 300 to bend from their slight inclination and assume positions generally perpendicular to the playing surface. 
     The parts of post anchor base assembly 200 also form an apparatus or system for converting a existing portable sectionalized flooring system into a flooring system for use as a volleyball court or another type of floor requiring posts. The apparatus would include support plate 202, post support 204, and tubes 206, 220 and 208. The apparatus could also include post support 204' and tubes 221 and 222. 
     Obviously, the sizes and materials used in the components making up the post anchor base assembly may be selected from a wide variety of sizes and/or materials. Merely to exemplify a preferred makeup of these components the following example is recited. Support plate 202 can be 9 inches by 22 inches with a 5/8 inch thickness. Rectangular tube 206 and tube extension 220 have similar dimensions. These tubes can be 2 inches×5 inches with a 1/8 inch wall thickness and have an approximately 47 inch length. Tubes 221 and 222 can have similar dimensions, except that their lengths are adjusted to accommodate this lengthwise orientation on the panels. Stiffening tubes 208 would have approximately a 12 foot length to extend across three panel widths. 
     Stiffening tubes 208 are shown as tubes having a cross-sectional shape slightly smaller than the inner cross-sectional shape of tubes 206, 220, 221, and 222. However, any configuration of stiffening member can be used long as the member fits securely within the outer tubes. For example, a pair of side-by-side tubes could be substituted for the single tube 208. When tubes 221 and 222 are used the lengths of tubes 208 are adjusted to accommodate the various lengths of the tubes to be joined. Post support tube 204 should be appropriately dimensioned to receive and support a post or a post adapter having a 3 to 5 inch outer diameter, depending on the type of post used. Support plate 202, tubes 206, 208 and 220, and post support tube 204 may be aluminum, a relatively lightweight metal, to improve portability. Post anchor hole cover 210 should be brass. 
     Having described a preferred embodiments in detail, it will be recognized that the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction, materials, assembly, etc. shown and described. Accordingly, all suitable modifications and equivalents may be resorted to the extent that they fall within the scope of the invention and claims appended hereto.