Abstract:
An intermediate scaffold member join comprising a top side, a first side and a second side cooperating to form a channel therebetween. The channel is sized to accept a horizontal scaffold member. The first side has a clamp for attaching to a horizontal scaffold member, the clamp joining a horizontal scaffold member substantially perpendicular to a horizontal scaffold member positioned in the channel. Positioned on the top side is a vertical stub directed away from the channel, where the vertical stub is connectable to a vertical scaffold member.

Description:
FIELD OF INVENTION 
   This invention relates to scaffold structures and, in particular, to placement of an intermediate vertical scaffold member or an intermediate horizontal member. 
   BACKGROUND OF THE INVENTION 
   Scaffold frames are structures composed of vertical and horizontal members joined together to create a frame, which usually has an elevated working surface or decking. Large vertical structures are created by joining vertical members together to create a vertical supports that are longer than individual vertical members. Generally, each vertical support for a scaffold frame is a series of joined vertical members that extend in an unbroken string until a foot section is reached, generally positioned on the ground. However, there are instances where a it is desirable to have a vertical member present at a particular elevation without the necessity of connecting that vertical member into a vertical support that extends to the ground level (an “intermediate vertical member”). For instance, an access safety railing located at the working surface may need intermediate vertical members to properly defined the railing. Installing intermediate vertical members has presented stability problems in the intermediate vertical member, particularly rotational instabilities. One device built to overcome some of these concerns is shown in  FIG. 1 , an intermediate vertical scaffold join. However, this intermediate vertical scaffold join is only useful in scaffold systems using particular latch members—latch members that are designed to latch into cups on a vertical member. A more general intermediated vertical scaffold join is needed. 
   Additionally, scaffold systems may need an intermediate horizontal member. In general, horizontal scaffold members are joined to vertical scaffold members to create a scaffold frame. There may be instances where it is desirable to join a horizontal member to another horizontal member, an intermediate horizontal member. 
   OBJECTS OF THE INVENTION 
   It is an object of the invention to provide a scaffold member join that allows for an easy connection for an intermediate horizontal scaffold member. 
   It is an object of the invention to provide a scaffold member join which allows for an easy connection for an intermediate vertical scaffold member. 
   SUMMARY OF THE INVENTION 
   The invention is an intermediate scaffold member join. The join is formed from a channel which, in placement, opens downwardly. The channel is shaped to engage a horizontal scaffold member within the channel, such as a “U” shaped channel. The interior facing edge of the channel has a clamp positioned for clamping to a second horizontal scaffold member. The exterior facing edge of the channel may have a cutout shaped to accommodate the placement of a horizontal member through the cut out. Positioned on the upper facing edge of the channel is a vertical stub, to which a vertical scaffold member may be inserted over. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  depicts a prior art scaffold member join. 
       FIG. 2  is a prospective view of the scaffold member join. 
       FIG. 2A  is an alternate embodiment of the second side of the scaffold member join. 
       FIG. 3  shows a prospective view of the join installed in a scaffold frame. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   Shown in  FIGS. 1 and 2  is a prior art intermediate scaffold member join  40 . This join is designed to work in scaffold systems where the horizontal scaffold members terminate in latches which are designed to latch into protruding cups positioned on a vertical scaffold member, as disclosed in U.S. Pat. Nos. 5,078,532 and 5,028,164 (the “Williams Joint”). The join  40  is a three sided channel structure, having a top side  37 , an interior side  38  and an exterior side  39 . Interior side is used to reference the side of the join facing the interior of a box scaffold structure when the join is installed on the structure, while exterior side is used to refer to the side of the join facing the exterior side of the scaffold structure. The interior side, top side and exterior side form a channel  35 . The channel is sized to snuggly engage a horizontal scaffold member  49  within the channel. The interior side  38  has two protruding ½ cup members  43 , adapted to engage the latch member of the Williams Joint. Located on the top side  37  of the join is an upstanding vertical stub  45 . Vertical stub  45  is sized to be insertable into a vertical scaffold member (not shown). 
   In use, the join&#39;s channel  35  is placed over horizontal scaffold member  49 , and a second horizontal scaffold member  52  terminating in a latch mechanism  44  is latched onto the two protruding ½ cup members  43  where the two horizontal members  49  and  52  are arranged in a right angle relationship. The latching of the join to horizontal scaffold member  52  helps prevent the rotational instabilities of the vertical stub/vertical member inserted over the stub. 
   A more general type of intermediate scaffold join is shown in  FIG. 2 . A three sided structure is shown, with a top side  11 , a first side  9 , and a second side  15  creating a channel  16  therebetween. As shown, first side has a length “H” as shown in  FIG. 2 . This length “H” determines the depth of the three sided channel  16 . As shown, “H” is the cross-sectional length of a horizontal scaffold member which, in  FIG. 2 , corresponds to the diameter of a horizontal scaffold member when the horizontal scaffold member is a tube member. This channel depth allows the channel to accommodate a horizontal scaffold member (shown as  49  in  FIG. 2 ) within the channel. Additionally, scaffold decking is usually “thinner” than the cross-sectional dimension of the horizontal scaffold members; hence, the offset dimension “H” allows scaffold decking to be placed over the protruding lip without interference, as is shown in  FIG. 3 . The length of first side could be less than the cross sectional length of a horizontal scaffold member, but in this case, adjustments must be made in the positioning of the attachment means next described. 
   First side  15  has a protruding lip  12  which projects away from the channel  16 . Positioned on this protruding lip  12  is an attachment means for attaching a horizontal scaffold member to the intermediate member join  1 . As shown, attachment means is a clamp  4  pivotally attached to protruding lip  12  at pivot  14 . The pivot action enables the clamp to adjust to angles of attachment (with respect to the channel) of other than 90 degrees. The second side  9  of the join may have an opening  10  of corresponding shape to the cross section of a horizontal scaffold member. Hence, a horizontal scaffold member  52  may be clamped to the join  1 , and the opening  10  on the second side  9  allows for the clamped horizontal scaffold member  52  to be of greater length than necessary, providing for flexibility. Alternatively, the second side  9  could be shortened to be of length “H” thereby dispensing with the need to have an opening  10  in the second side  9 . As shown, the join allows for two horizontal scaffold members  52  and  49  to be positioned at the join in a substantially right angle relationship with one member crossing under or over the other member. This arrangement helps the join resist rotation about either horizontal scaffold member  52  or  49 . Obviously, the join in  FIG. 3  could be employed with the first side  5  facing the interior or the exterior of a scaffold frame. 
   Instead of a clamp, the first side  15  could be constructed similarly to that shown for the second side  9 , that is, the first side  15  and second side could be substantially identical—a downwardly projecting plate with an opening therein to accommodate a horizontal scaffold member (the opening could be completely enclosed as shown in  FIG. 2 , or the opening could be partially enclosed, as shown in  FIG. 2A ). This opening forms the attachment means for a horizontal scaffold member. While such a design resists rotation about the two axis that align with the horizontal scaffold members, this embodiment does not resist translational movement or the sliding of horizontal member  52  along its length, and hence, is not preferred. Positioned on the top side  11  of the join  1  is an upstanding vertical stub  7 . Vertical stub  7  is sized to allow a vertical scaffold member to slide over the stub to thereby create an intermediate vertical horizontal scaffold member which is rotationally stable (obviously, the stub could be sized to allow a vertical scaffold member to be inserted into the stub). As shown, a vertical stub is welded to the top side, but could also be detachable, such as by having a sleeve on the top side with a tab located on the vertical stub which inserts into the tab. Vertical stub  7  may have a latch button  13  which aligns and protrudes through a corresponding opening in a vertical scaffold member inserted over the vertical stub. The depressable latch button is used to lock the vertical scaffold member to the vertical stub. 
   As described, the join can be used to place an intermediate horizontal member in place on a scaffold frame without utilizing the vertical stub for inclusion of a vertical member, or an intermediate vertical scaffold member on a scaffold frame. 
   Although the present invention has been described in terms of specific embodiments, it is anticipated that alterations and modifications thereof will no doubt become apparent to those skilled in the art which are intended to be included within the scope of the following claims.