Abstract:
The present invention relates to a portable framing fixture for fabricating wall frames. Pneumatically controlled clamping mechanisms retain and locate various components of a frame wall. Spring loaded locator pins allow for variations in openings in the frame wall and allow for various frame wall designs. An offloading system allows for removal of completed frame walls from the portable framing fixture. The portable framing fixture is mounted onto a wheeled axle assembly to allow for easy transportation of the portable framing fixture to different job sites.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   None. 
   STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
   Not Applicable. 
   BACKGROUND OF THE INVENTION 
   In the construction of frame buildings, it is very important that frame walls be constructed such that the components of the frame wall are square. The top framing members should be parallel to the bottom framing members, and the vertical framing members must be perpendicular to the top and bottom framing members. Additionally, openings for window, doors, and other inserted components within the frame wall must be located properly, and the framing components for those openings must be square with the other framing components. Although these framing requirements are common knowledge in the construction industry, it is impractical to design and construct framing jigs for each type and variation of frame wall. Additionally, such a framing jig would not be easily transportable. 
   To solve this problem, there have been several attempts to invent a device that ensures that frame walls are constructed squarely, that would allow for variations in the design of the frame wall being fabricated, and would be transportable from job site to job site. However, all of these attempts suffer from one of more deficiencies. 
   Examples of variations for framing fixtures can be found in a number of patents. U.S. Pat. No. 4,154,436 discloses a wall component fabricating jig for building components. The jig includes a wheeled dolly that makes the jig portable. A frame is included that holds the upper and lower longitudinal plate and sill in position. Other holders are positioned on the frame to locate and hold vertical stud members. The clamping mechanism allows for fabrication of walls that vary in height from eight to ten feet. The frame includes a clamping ability that clamps the upper plate and the lower sill against the vertical studs until the frame assembly has been nailed together. After assembly, the wood frame assembly is lifted from the jig by two conveyors and the wood frame assembly is rolled off the jig. All clamping and adjusting parts are controlled by pneumatic devices. However, the device does not include spring loaded vertical stud locators and the clamping operation does not include a rack and pinion assembly for more precise clamping. 
   U.S. Pat. No. 3,711,007 also discloses a building wall section fabricating machine for fabricating the wall of a building. The jig includes a set of wheels that allow the device to be portable. Longitudinal wood sills and plates are placed in position on the jig, followed by the placement of vertical wall studs using stud placement saddle units. The jig includes several adjustment screws that allow the frame to be adjusted for fabricating walls of varying heights. However, as before, the device does not include any clamping mechanism or spring loaded vertical stud locator pins. Additionally, the assembled wood frame section is removed by a hoist because the jig does not include any devices that allow the assembled wood frame section to be off-loaded from the jig. The device has no rack and pinion assembly for clamping. 
   The device in U.S. Pat. No. 3,629,931 discloses an apparatus for nailing a structural frame. The device includes a set of axle-mounted wheels that allows the device to be portable. Longitudinal plates and sills are placed on the jig and vertical studs are interspersed between, the studs being located by a series of brackets consisting of two vertical plates. However, there is no adjustment for fabricating wood frame walls of different vertical heights. There are also no spring loaded pins for locating the vertical studs, and there is no apparent clamping capability or rack and pinion assembly for clamping. 
   Finally, the device in U.S. Pat. No. 3,933,348 discloses a wall framer for use in assembling wall frames. Although the device is intended to be portable, it does not include wheels or axles. Instead, the device is generally collapsible and is transported by a truck or other vehicle. The device does not appear to be capable of adjustment for varying heights of wall frame assemblies. Longitudinal plates and sills are placed on the jig and vertical studs are interspersed between. Although, the vertical studs are located using spring loaded pins, there is no clamping capability to compress the wood frame components together during assembly and there is no rack and pinion assembly. 
   While all of the above inventions are intended to provide an adjustable, transportable wall framing fixture, all of these devices have at least one significant deficiency that prevents those devices from solving all of the problems with such fixtures. 
   SUMMARY OF THE INVENTION 
   The present invention overcomes these and other problems by providing a wall framing fixture that is portable, that can accept a wide variety of variations in the design of the wall being framed, and that ensures all of the components of the frame wall are square. 
   More specifically, the present invention resides in a fixture that includes a rack and pinion unit for evenly and precisely clamping the frame wall components for assembly. A number of spring loaded pins in the fixture allow for uneven and special location of the vertical studs within the frame wall and thus, accommodate various frame wall designs that have different sizes and placements of windows, doorways, and other special openings. Once the frame wall is fabricated, it is easily removed from the fixture by devices that lift the frame wall from the fixture and place the frame wall on a series of rollers that allow the fabricator to roll the completed frame wall off of the fixture. The entire portable framing fixture includes a towing tongue and is mounted on a wheeled axle assembly for ease in transportation. 
   Additional features of the present invention will be in part apparent and in part pointed out hereinafter. 

   
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
     In the drawings, wherein like numerals and letters refer to like parts wherever they occur. 
       FIG. 1  is a front perspective view of one embodiment of the present invention; 
       FIG. 2  is a rear perspective view of one embodiment of the present invention; 
       FIG. 3  is a perspective view showing the arrangement of the horizontal clamping surfaces; 
       FIG. 4  is a perspective view showing the arrangement of the main pneumatic clamping cylinder; 
       FIG. 5  is an end view of one clamping frame showing the offloading mechanism in its retracted position; 
       FIG. 6  is an end view of one clamping frame showing the offloading mechanism in its extended position; 
       FIG. 7  is a side view of the offloading mechanism; 
       FIG. 8  is a front view of the rack and pinion area of the clamping frame; 
       FIG. 9  is a section view of the rack and pinion area of the clamping frame; 
       FIG. 10  is a perspective view showing one type of frame wall that can be constructed from wood components using the present invention; 
       FIG. 11  is a perspective view showing the clamping system of one embodiment of the present invention; 
       FIG. 12  is a perspective view shows the clamping and offloading activation controls in one embodiment of the present invention; and 
       FIG. 13  is a perspective view showing the pivot levers of the offloading system of one embodiment of the present invention. 
   

   Corresponding reference characters indicate corresponding parts throughout the several views of the drawings. 
   While one embodiment of the present invention is illustrated in the above referenced drawings and in the following description, it is understood that the embodiment shown is merely for purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the present invention may be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of the present invention, which is to be limited only in accordance with the claims contained herein. 
   DETAILED DESCRIPTION 
   Referring now to  FIG. 1 , a portable wall framing fixture A is shown. The portable wall framing fixture A includes a locating system  1  for a set of wall framing components, a clamping system  2  that clamps the set of wall framing components, an offloading system  3  for allowing a completed frame wall B to be removed from the portable framing fixture A, and a trailer system  4  for transporting the portable wall framing fixture A between job sites. 
     FIG. 10  shows the typical wood frame wall B that might be constructed using the portable framing fixture A. The frame wall B shown herein is made from wood components and is only one example of the type of wall frame construction materials with which the present invention may be used. Thus, while the frame wall B shown herein is made from wood components, this is just one embodiment of the present invention and the present invention may also be used generally to assist in the assembling of other wall frame components made from other types of materials such as, for example, metal or plastic wall framing components. 
   The wood frame wall B example shown herein includes two upper wood frame plates  15 , a lower wood frame plate  16 , and a plurality of vertical wood frame studs  17 . Where an end of the wood frame wall B is a point where two wood frame walls meet at a corner, a corner vertical stud  22  is included as part of the wood wall frame B. Where window openings  18  or door openings  19  are located in the wood frame wall B, headers  20  and footers  21  are installed as shown. The entire wood frame wall B is generally assembled by nailing the components together. It is the general practice in wood frame construction to drive the nails through the two upper wood frame plates  15  and the lower wood frame plate  16 , and into the ends of the vertical wood studs  17 . Additionally, the vertical wood studs  17  are usually toe-nailed into the two upper wood frame plates  15  and the lower wood frame plate  16 . 
   The locating system  1  ( FIG. 2 ) includes a first framing jig  5  and a second framing jig  6 . It is understood that the second framing jig  6  includes all of the components of the first framing jig  5  with the exception that the second framing jig  6  and its components are a mirror image of the first framing jig  6  and its components. The first framing jig  5  and the second framing jig  6  are spaced a part at a distance H and are located generally equidistant from the longitudinal centerline X of the trailer system  4 . 
   The first framing jig  5  ( FIG. 3 ) comprises an I-beam  7 , a locator angle  8 , and a plurality of spring loaded locator pins  9 . The plurality of spring loaded locator pins  9  are arranged in groups of two, with the space between each of the two locator pins  9  being sized to allow for the placement of a standard 2×4 inch wood frame construction stud that has been positioned such that the 2 inch side of the wood frame construction stud contacts an upper surface  10  of the first framing jig  5 . The centerline of each two-pin group of spring loaded locator pins  9  is located at about 16.00 inches from the centerline of each adjacent two-pin group of locator pins. This distance allows for construction of a frame wall with the vertical frame construction studs located at the standard industry construction location of about 16.00 inches on center. Each individual spring loaded locator pin  9  is mounted to the upper flange  11  of the I-beam  7 . The I-beam  7  has a plurality of openings in the upper flange  11  that allow the installed spring loaded locator pins  9  to protrude about 1.50 inches beyond the upper flange  11  of the I-beam  7 . Each spring loaded locator pin  9  comprises a cylindrical pin  12  and a spring  13 . 
   Although the primary purpose of the plurality of spring loaded locator pins  9  is to located the vertical frame studs  17  ( FIG. 10 ) within the frame wall B being constructed, the spring loaded nature of the spring loaded locator pins  9  ( FIG. 3 ) allows the pins to be depressed below the upper surface  10  of the upper flange  11  of the I-beam  7 . This allows for the relocation of any of the plurality of spring loaded locator pins  9  whenever the design of the frame wall B being fabricated has vertical frame studs  17  ( FIG. 10 ) at locations other than the standard 16.00 inches on center location for vertical frame studs. Additionally, this also allows any of the plurality of spring loaded locator pins  9  ( FIG. 3 ) to be depressed if there is interference between any spring loaded pin  9  and a header  20  ( FIG. 10 ) or footer  21  for a door opening  19  or window opening  18  in the frame wall B being fabricated. 
   The locator angle  8  ( FIG. 3 ) is attached to the I-beam  7  by locating a horizontal flange of the locator angle  8  to the underside of the upper flange  11  of the I-beam  7 . In the present embodiment, the locator angle  8  is attached with threaded fasteners, however, other forms of attachment such as rivets or welding may be used while still remaining within the scope of the present invention. The locator angle  8  has a plurality of access openings  14  in a vertical flange  46  of the locator angle  8 . Each of the plurality of access openings  14  are in alignment with at least one of the two pin groupings of the plurality of spring loaded locator pins  9 . The plurality of access openings  14  provides access to the two upper frame plates  15  ( FIG. 10 ) and the lower frame plate  16  of the frame wall B being fabricated such that nails can be placed into the upper or lower frame plates  15  and  16  to attach each of the vertical stud members  17  to the upper and lower frame plates  15  and  16 . 
   Each of the first framing jig  5  ( FIG. 1 ) and the second framing jig  6  are mounted onto four clamping tube assemblies  28 . Each clamping tube assembly  28  has a distal end and a proximate end. The first and second framing jigs  5  and  6  are mounted onto the upper surface of the proximate ends of each of the clamping tube assemblies  28 . The distal end of each clamping tube assembly  28  is equipped with a gear rack  29  ( FIG. 9 ). 
   Four sets of slider tube assemblies  30  ( FIG. 2 ) are mounted onto the main trailer frame  31 . Each set of slider tube assemblies  30  comprises an upper tube  32  and a lower tube  33 . The upper tube  32  and the lower tube are substantially equal in length and the upper tube  32  is attached to the lower tube  33  such that the ends of both tubes are generally even. The lower tube  33  is attached transversely to the longitudinal axis X of the main trailer frame  31  with the midpoint of the length of the upper tube  32  and the lower tube  33  in general alignment with the longitudinal axis X of the main trailer frame  31 , and with the upper tube  32  resting upon the upper surface of the lower tube  33 . 
   A plurality of drive shaft openings  35  ( FIG. 8 ) in the upper tube  32  of each of the three sets of slider tube assemblies  30  are located generally on the longitudinal axis X of the main trailer frame  31  and are sized to accept a drive shaft  34 . A bearing  36  for supporting the drive shaft  34  is located in at least two of the plurality of drive shaft openings  35 . The drive shaft  34  is inserted through each of the plurality of drive shaft openings  35  and the ends of the drive shaft  34  are inserted into each of the at least two bearings  36 . A set screw  37  is used to clamp the drive shaft  34  into each of the bearings  36 . 
   A gear  38  ( FIG. 9 ) is located on the drive shaft  34  inside each of the slider tube assemblies  30  where the drive shaft  34  extends through one of the plurality of drive shaft openings  35 . As seen in  FIG. 9 , the gear rack  29  of the clamping tube assembly  28  of the first framing jig  5  is positioned beneath the gear  38 , and the gear rack  29  of the clamping tube assembly  28  of the second framing jig  6  is positioned over the gear  38 . When assembled, the gear  38  and the two gear racks  29  are arranged to generally operate as a rack and pinion. 
   A first mounting frame  39  ( FIG. 4 ) is attached to the lower flange  40  ( FIG. 3 ) of the I-beam  7  of the first framing jig  5 . A clamping cylinder  23  ( FIG. 4 ) is attached to the mounting frame  39  such that the piston of the clamping cylinder  23  is transverse to the longitudinal axis X of the main trailer frame  31 . A second mounting frame  41  ( FIG. 11 ) is attached to the lower flange  40  ( FIG. 3 ) of the I-beam  7  of the second framing jig  6 . A piston extension  42  ( FIG. 11 ) is attached to the piston  45  of the clamping cylinder  23  and to the second mounting frame  41 . 
   The clamping system  2  provides a means of clamping the components of the frame wall B until the entire frame wall B can be assembled.  FIG. 10  shows one example of a frame wall B to be constructed using the present invention. In the clamping process, all of the components of the frame wall B, including the two upper frame plates  15 , the lower frame plate  16 , the vertical studs  17 , the headers  20 , and the footers  21  have been placed into the portable wall framing fixture A. More specifically, the two upper frame plates  15  are placed on the upper surface  10  of the I-beam  7  ( FIG. 3  and  FIG. 10 ) of the first framing jig  5 , with the 2 inch edge of the two upper frame plates  15  in contact with the upper surface  10 . In a similar manner, the lower frame plate  16  is placed on the upper surface  10  of the I-beam of the second framing jig  6 . All necessary vertical studs  17  are then placed between the two upper frame plates  15  and the lower wall frame plate  16 , with the 2 inch edge of the vertical studs  17  contacting the upper surface  10  of the I-beam  7  of both the first framing jig  5  and the second framing jig  6  such that the vertical studs  17  bridge the gap between the first framing jig  5  and the second framing jig  6 . All other headers  20  and footers  21  are placed in position as needed between the vertical studs  17  and the two upper frame plates  15  and the lower frame plate  16 . Where the location of any vertical stud  17 , corner vertical stud  22 , header  20 , or footer  21  places that component in dimensional conflict with any of the plurality of spring loaded locator pins  9 , the interfering spring loaded locator pin  9  is depressed to allow the framing component to contact the upper surface  10  of the I-beam  7  of either the first framing jig  5  or the second framing jig  6  as necessary. 
   When all the components of the frame wall B are located loosely between the first framing jig  5  and the second framing jig  6 , and are resting upon the upper surfaces  10  of the I-beams  7  of each of the first and second framing jigs  5  and  6 , the clamping system  2  is activated to clamp all of the components of the frame wall B together in preparation for the assembly of the components. 
   The clamping process is initiated when the operator activates one of the control buttons on a bank of control buttons  43  ( FIG. 12 ) that is located at one end of each of the first framing jig  5  and the second framing jig  6 . In the current embodiment of the present invention as described herein, the control buttons are used to direct and control pressurized air. It will be appreciated, however, that other types of fluid, such as for example hydraulic fluid, may also be used while still remaining within the scope of the present invention. Likewise, electrical, mechanical, and electromechanical controls may also be used in place of the pneumatic controls described in the present embodiment and also remain within the scope of the present invention. The required function of each controlling device herein is disclosed in a manner that will allow those skilled in the well known art of hydraulic, electrical, mechanical, and electromechanical control devices to readily adapt or replace the pneumatic control devices described in the current embodiment of the present invention with similar devices from those other areas of control devices and those other types of control devices are within the scope of the present invention. 
   Two of the pneumatic control buttons are used to activate and deactivate the clamping cylinder  23  in the clamping system  2 . Specifically, a clamping activation button  24  engages a pneumatic circuit that actuates the clamping cylinder  23  to pull the first framing jig  5  and the second framing jig  6  together. The clamping action takes place when the pressurized air in the clamping cylinder  23  retracts the piston  45 . Because the piston  45  is attached to the piston extension  42 , and the piston extension  42  is attached to the second mounting frame  41  connected to the first framing jig  5 , extension of the piston  45  causes the first framing jig  5  to extend away from the second framing jig  6  while retraction of the piston  45  causes the first framing jig  5  to move toward the second framing jig  6 . During the clamping process, the gear rack  29  ( FIG. 9 ) on each of the clamping tube assemblies  28  simultaneously rolls around the gear  38  on the drive shaft  34  thereby providing a precise and controlled movement of the first framing jig  5  ( FIG. 1 ) in relation to the second framing jig  6 . The actual pneumatic interconnections are well-known in the art and it is understood that the pneumatic control system described herein includes all necessary hose, pipe, or tubing connections between the pneumatic components as need to allow the pneumatic system to function as described herein. The same holds true when hydraulic, electrical, or electromechanical controls are used in the present invention. 
   As the first framing jig  5  and the second framing jig  6  approach each other, the vertical flange  46  ( FIG. 3 ) of the locator angle  8  on the first framing jigs  5  approaches and comes into contact with the two upper frame plates  15 , and the vertical flange  46  of the locator angle  8  on the second framing jig  6  approaches and comes into contact with the lower frame plate  16 . As the clamping process continues, the two upper frame plates  15  and the lower frame plate  16  approach and contact the plurality of vertical studs  17  and any corner vertical studs  22 . The clamping process also biases other components of the frame wall B against any headers  20  or footers  21 . The clamping process  2  is completed when the piston  45  ( FIG. 12 ) of the clamping cylinder  23  accomplishes the clamping together of the wall frame components or until the clamping cylinder  23  reaches the end of its travel. It is appreciated that the range of travel of the piston  45  allows for variances in the overall height of the frame wall B and the length of the piston can be adjusted to compensate for frame walls B that are shorter or taller than the standard 8 feet height. In fact, the amount of travel in clamping system  2  allows for assembly of wall frames B varying in height from about eight feet to about ten feet. Once the clamping process  2  is complete, the components of the frame wall B is assembled in accordance with the local construction code. 
   When the components of the frame wall B have been assembled, the clamping deactivation button  25  is actuated to cause the piston  45  of the clamping cylinder  23  to extend. As the piston  45  extends, the piston extension  42  attached to the piston  45  also extends and together the piston  45  and the piston extension  42  act to bias the first mounting frame  39  on the first framing jig  5  away from the second mounting frame  41  on the second framing jig  6  thereby moving the first framing jig  5  away from the second framing jig  6 . The unclamping action continues until the piston  45  reaches the end of its travel within the clamping cylinder  23 . It is understood that during the unclamping process, the assembled frame wall B is released from the vertical flange  46  ( FIG. 3 ) of the locator angle  8  of each of the first framing jig  5  and the second framing jig  6  and makes the assembled frame wall B ready for the offloading system  3  to position the frame wall B for removal from the portable wall framing fixture A. 
   The offloading system  3  generally comprises two ramp assemblies  47  that raise or lower the completed frame wall B from the portable framing fixture A. As shown in  FIG. 2 , one ramp assembly  47  is attached to the first framing fixture  5  and the second ramp assembly  47  is attached to the second framing fixture  6 . Each ramp assembly includes a plurality of rolling elements  50  ( FIG. 3 ) mounted into a channel  51  having two vertical flanges  52  and a horizontal connecting member  53 . In the present embodiment, the plurality of rolling elements  50  are wheels and each of the wheels are attached to the channel  51  with a bolt  54  and a nut  55  that are mounted in one of a set of axle openings  56  in the two vertical flanges  52  of the channel  51 . It will be appreciated that the set of axle openings  56  are located and sized such that any one of the axle openings  56  in a vertical flange  52  of the channel  51  match and are in axial alignment with another axle opening  56  in the other vertical flange  52  of the channel  51 . The diameter of the set of axle openings  56  is sized to match the diameter of the bolts  54  and to allow the bolts  54  to be inserted into the axle openings  56  of the channel  51 . It is understood that each of the wheels in the current embodiment include a bearing located at the axial centerline of each wheel, and that during assembly of the ramp assemblies  47 , the bolt  54  is inserted through one of the axle mounting openings  56  in one of the vertical flanges  52  of the channel, then through the bearing of the wheel, and then through the axle mounting opening  56  in the other vertical flange  52  of the channel  51 . The nut  55  is then attached to the end of the bolt  54  to secure the wheel between the two vertical flanges  52  of the channel  51 . In the present embodiment, spacers  57  are also included to alternately locate each of the wheels to be near one of the vertical flanges  52  of the channel, with the next adjacent wheel located near the other vertical flange  52  of the channel  51 . It is understood that while the plurality of rolling elements  50  in the present embodiments are wheels, other types of rolling elements may be used. For example, rollers that generally extend between the two vertical flanges  52  of the channel  51  may be used in place of the wheels. Any other rolling device may also be used as long as the rolling device allows the assembled frame wall B to be removed from the portable frame fixture A by rolling the assembled frame wall B off of the portable frame fixture A. 
   It will be appreciated that the following description applies to each of the two ramp assemblies  47 , one of which is attached to the first framing jig  5  and the other being attached to the second framing jig  6 . Each ramp assembly  47  ( FIG. 7 ) is attached to its related framing jig  5  or  6  by an actuator lever assembly  48 . Each actuator lever assembly comprises a lever  58 , a cylinder  59 , and an end pivot  60 . The lever  58  has a distal end  67 , a proximate end  68 , and an intermediate pivot opening  69 . The cylinder  59  includes a rod  63  that attaches to the proximate end  68  of the lever  58  with a clevis  64  and clevis pin  65 . The distal end  67  of the lever  58  is attached to the one of the two vertical flanges  52  of the channel  51  with a pin assembly  66 . The lever  58  is also pivotally attached to the I-beam  7  of the applicable first or second framing jig,  5  or  6  with a pivot pin assembly  70  installed into the intermediate pivot opening  69  of the lever  58 . It is understood that in the present embodiment, each ramp assembly has one cylinder  59 , however, more than one cylinder may be used and still remain within the scope of the present invention. 
   Each ramp assembly  47  also has a plurality of pivoting levers  71  ( FIG. 13 ) that attach each of the two ramp assemblies  47  to the I-beam  7  of the applicable framing jig  5  or  6 . Each pivoting lever  71  is attached to the I-beam  7  and to the same vertical flange  52  of the channel  51  that the distal end  67  of the actuator lever assembly  48  is attached. Pivot pin assemblies  72  are used to attach the pivoting lever  71  to the vertical flange  52  and to the I-beam  7 . 
   The offload system  3  is initiated by actuation of the offloading activation button  26  ( FIG. 12 ) to allow the cylinders  59  ( FIG. 7 ) to become pressured by fluid (in the present embodiment, the fluid used is air), thereby extending the rod  63 . Because the rod  63  is attached to the proximate end  68  of the lever  58  with the clevis  64  and the clevis pin  65 , the extension of the rod  63  pushes the proximate end  68  of the lever  58  toward the rear of the main trailer  31 . The lever  58  pivots around the pivot pin assembly  71  ( FIG. 13 ) installed into the intermediate pivot opening  69  of the lever  58 , causing the distal end  67  of the lever  58  to raise and to move toward the front end of the main trailer frame  31 . Simultaneously, the two ramp assemblies  47  are also lifted upward by the plurality of pivoting levers  71 . In the fully activated position, each of the two ramp assemblies  47  are held at a position as shown in  FIG. 6  such that the top of the plurality of rolling elements  50  are higher than the upper surface  10  of the I-beams  7 . Because the rolling elements  50  are higher than the upper surface  10  of the I-beams  7 , the assembled frame wall B is lifted from the upper surface  10  and rests on the plurality of rolling elements  50 . The operator can then roll the frame wall B off the portable framing fixture A. After the frame wall B is removed, the offloading deactivation button  27  ( FIG. 12 ) is actuated to release the fluid pressure from within the cylinder  59  ( FIG. 7 ) thereby allowing the two ramp assemblies  47  to return to their resting position as shown in  FIG. 5  to await the offloading of another newly constructed wall frame B. 
   The trailer system  4  ( FIG. 1 ) includes the main trailer frame  31 , an axle assembly  73 , and four stabilization devices  75 , as well as all lighting and electrical wiring to make the portable wall framing fixture A in compliance with all local and federal highway and traffic regulations. The size and type of axle suspension  76  and tires  77  are selected and sized as need to match the weight of the portable framing fixture A. The attachment of the axle assembly  73  to the trailer frame  31  is well known in the art and will not be described in detail herein. The trailer frame  31  in the present embodiment is generally constructed of tubing and is made airtight such that the trailer frame  31  acts as an air reservoir in the present embodiment for the pneumatic system that operates the locating system  1 , the clamping system  2 , and the offloading system  3 . The four stabilization devices  75  are stored in the retracted position until the portable wall framing fixture A is positioned at a job site. At that time, the four stabilization devices  75  are lowered until they contact the ground to stabilize the portable wall framing fixture A during use. 
   While the above description describes various embodiments of the present invention, it will be clear that the present invention may be otherwise easily adapted to fit any configuration where a portable wall framing fixture having the ability to ensure square wall frames and be adjustable for a wide variety of frame wall designs is required. 
   As various changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.