MXPA98006111A - Devanadora de tors - Google Patents

Abstract

The present invention relates to a torsion winder for adding twist to a roller tube structure, including a roller tube rotatable with respect to a rod and a torsion spring between the roller tube and the rod, the twist winder is characterized in that comprises: a drive structure including a driving motor, a holding structure holds the pulse structure and includes a coupler to connect the rod to the impulse motor for rotation with it and a latch engageable with the roller tube to hold the tube winder against rotation, and a control system in communication with the impulse motor and including a programma logical controller

Description

BACKGROUND OF THE INVENTION The present invention relates generally to awnings, pavilions or sliding cubers and more specifically to retractable awnings that include a torsion spring or torsion spring. There are a number of known retractable awning structures that when mounted on a vertical wall, create a protected area adjacent to the wall. A popular application of these awning structures is by the side of a recreational vehicle. The structures of retractable awnings can be divided into two general classes: drawer type awnings and sliding type awnings. The drawer type awnings have a rotating roller tube that is mounted on the wall. The awning is unrolled from the tube in an extended position and rolled onto the tube for storage. A box forms a stationary enclosure for the awning when it is stored. Rolling roller-type awnings have a rotatable roller tube, suspended between two support arms. The tube moves laterally towards and away from the wall to unwind and roll up the awning. One edge of the awning is connected to the wall and the other edge of the awning is connected to the tube. Both types of retractable awnings are typically spring-derived or offset, with torsional springs, to assist in winding the awning on the furling tube. The torsional springs effectively help in winding the awning in the furling tube, when they have adequate torsion and substantially equal torsion at each end of the furling tube. Prior art methods for applying torsion to the springs, however, have often resulted in uneven torsion or no torsion. The torsion has typically been applied with a crank, while the operator manually counts the number of turns applied. The operator must physically maintain the crank until an interlock pin is inserted. This process is not only physically demanding, but is also subject to many types of errors. For example, the operator can easily count the number of turns applied to the furling tube structure incorrectly or apply a number of intended turns for a different awning model. This is particularly true when the process is interrupted for a break or at the end of a shift. Accordingly, there is a need in the art for an improved method and apparatus for applying torsion to retractable canopy structures. Brief Summary of the Invention The present invention provides a method and apparatus that overcomes at least some of the above-noted problems of the related art. According to the present invention, a method for adding twist to a roller tube structure includes the steps of coupling an awning rod with a motor of displacement of a driving structure and holding a roller tube of awning in a retaining structure, for substantially avoid rotation of the roller tube. The pulse motor rotates the rod relative to the winder tube in a first direction for a predetermined number of revolutions, to obtain the desired amount of torque. The rod is locked in the furling tube to prevent rotation between the rod and the furling tube in a second direction opposite to the first direction that would remove it to the twist just obtained. Finally, the rod is disengaged from the impulse motor and the winder tube is released from the retaining fitting. Preferably, the pulse motor is moved by a programmable logic controller that automatically rotates the pulse motor a predetermined number of turns that are fed to the controller. According to another aspect of the invention, the model of the roller tube structure or the required number of rotations is fed to the controller by a barcode scanner. According to yet another aspect of the invention, the controller is pre-programmed with the appropriate retention structures required for various models and verifies that adequate retention access is present before proceeding with the procedure. A torsion feeder according to the present invention includes a drive structure that includes a drive motor, a retaining structure subject to the impulse structure, and a control system in communication with the impulse motor. The retaining structure includes a coupler connectable with the rod to connect the rod to the drive motor for rotation therewith and a latch engageable with the winder tube to hold the roller tube against rotation. The control system includes a programmable logic controller, to control the operation of the pulse motor. Preferably, the latch has a spring-loaded tongue such that the rod engages and the roller tube is held only as it moves longitudinally in the roller tube structure in the retaining fitting. Brief Description of the Various Views of the Drawing These and additional features of the present invention will be apparent with reference to the following description and drawing, wherein: Figure 1 is a perspective view of a recreational vehicle having a retractable awning subject; Figure 2 is a side elevational view of the first retractable awning roller tube structure of Figure 1; Figure 3 is a front elevation view in cross section of a portion of the roller tube structure taken on line 3-3 of the Figure 2; Figure 4 is an elevational, cross-sectional view of the furling tube structure taken on line 4-4 of Figure 3; Figure 5 is a right side elevation view of a second retractable canopy winding tube structure of Figure 1; Figure 6 is a front elevational view in cross section of a portion of the roller tube structure taken on line 6-6 of Figure 5; Figure 7 is an elevational, cross-sectional view of the roller tube structure taken on line 7-7 of Figure 6; Figure 8 is a side elevational view of the roller tube structure of Figure 1, attached to a twist winder according to the present invention; Figure 9 is a side elevational view of the driven structure of the torsion coiler of Figure 8; Figure 10 is an end elevational view of the torque structure of the torsion coiler of Figure 8; Figs. 1a and 1bb are side views and in end elevations partially in cross section, of a first twist winder retention structure of Fig. 8; Figures 12a and 12b are side and end elevational views, respectively, of a retaining structure support of Figures Ia and llb; Figures 13a and 13b are side and end elevation views, respectively, of a coupler of the retaining structure of Figures Ia and llb; Figures 14a and 14b are side views and end elevations respectively, of a latch of the retaining structure of Figures Ia and llb; Figure 15 is a side elevational view in partial cross-section of the retention fitting of Figures 1A and 1B, with the reel tube structure of Figures 2 to 4 attached, - Figure 16 is a cross-sectional view that it is taken on line 16a, 16b of Figure 15; Figures 17a and 17b are side and end elevational views respectively of a second torsion coiler holding assembly of Figure 8; Figures 18a and 18b are side and end elevational views, respectively, of a retaining structure support of Figures 17a and 17b; Figures 19a and 19b are side and end elevation views, respectively, of a coupler of the retaining structure of Figures 17a and 17b; Figure 20 is a side elevational view in partial cross section of the retaining fitting of Figures 17a and 17b, with the roller tube structure of Figures 5 to 7 attached; Figure 21 is a cross-sectional view taken on line 21-21 of Figure 20; Figures 22a and 22b are side views and end elevations respectively, of a support similar to the support of Figures 18a and 18b for a third retainer assembly; and Figure 23 is a diagrammatic view of a torsion coiler controller system of Figure 8. Detailed Description of Preferred Modes Figure 1 illustrates a recreational vehicle 10 having a retractable awning structure 12 mounted on a generally side wall. vertical 14. The awning structure 12 is movable between a portion stored adjacent the side wall 14 of the recreational vehicle and an extended position forming a housing adjacent the side wall 14. The awning structure 12 includes a mounted awning rail 16 in the side wall 14, a furling tube structure 18, and an awning 20 rotatable in the furling tube structure 18. The awning 20 is made of vinyl, canvas or other material known in the art. A back edge of the awning 20 is fastened to the rail 16 and a leading edge is attached to the roller tube structure 18. The awning structure 12 also includes a pair of support arms 22 and a pair of tension structures 24. Upper ends of the arms 22 support the roller tube structure 18 and the lower ends are mounted in removable form in the side wall 14 or alternately support a ground surface. The tension structures 24 are arranged between the front and rear edges of the awning 20 to keep the awning 20 in tension. Preferably, inner ends of the tension structures 24 are pivotally connected to the side wall 14 and outer ends are slidably connected to the support arms 22. A pull strip 26 is wound with the awning 20 and used to unroll the awning 20. .

Figures 2 to 4 illustrate a first type of furling tube structure 18a, for the retractable canopy structure 12. The illustrated furling tube structure 18a is model No. 8400 available from Dometic Corporation, Elkhart, Indiana. The roller tube structure 18a includes torsion rods 28, a roller tube 30, rotatably supported by the torsion rod 28 and end caps 32 disposed at the ends of the roller tube 30. The torsion rods 28 extend within the ends of the winder tube 30 and through the end caps 32. The outer ends of the torsion rods 28 have openings that are provided for pass-through pins 34 for pivotally holding the torsion rods 28 with the support arms 22, such that the roller tube structure 18 is supported by the supporting sides 22. The end caps 32 generally close the open ends of the roller tube 30 and are fastened to the roller tube 30 with fasteners 36, such as the rivets illustrated in FIG. turn. The end caps 32 also have an opening or notch 37 adjacent an edge extending from a front face portion to an edge of a flange portion. Bearings 38 rotatably support the roller tube 30 on the torsion rods 28 and rotate with the end 30 relative to the torsion rod 28. Mounted in this manner, the torsion rods 28 define a co-linear support and rotational axis for the tube. winder 30. Winding torsion springs 40 extend relative to the torsion rods 28 within the winder tube 30. The outer end of each torsion spring 40 is held on the torsion rod 28, with a screw near the end cap 32 and the inner end of each spring 36 is secured to the secondary bearing 35 with a screw. When torque is applied or applied to them, the torsion springs 40 divert the awning structure 12 to the retracted position when the awning 20 is wrapped around the furling tube 30. At least one end of the furling tube structure 18a is provided with a ratchet or lock structure 42 that selectively limits the rotation of the winder tube 30 to one or the other direction. The lock structure 42 of the illustrated embodiment includes a gear 44, a reinforcement 46 and a lock member 48. The gear 44 has a plurality of teeth that define stops and is fastened to the torsion rod 28 for rotation therewith. The reinforcement 46 is rotated relative to the torsion rod 28 adjacent to the gear 39 and is secured to the end cap 32 for rotation therewith. The securing member 48 is pivotally mounted to the reinforcement 46 by a post 50 that extends through a passage in the reinforcement 46 and the end cap 32, and has first and second opposed ratchets. Opposing ends of a torsion spring 52 abut against the bushings 54 mounted on the latch member 48. The bushings 54 are located symmetrically on opposite sides of the post 46. The spring 52 bears inwardly against the bushings 54, so that one of the pawls engages in the gear 44, to resist any tendency of the safety member 48 to remain in the neutral position. The securing member 48 is operable by a handle 56 disposed at an outer end of the post 50 outside the end cap 32. By operating the handle 56, the securing member 48 is pivotable between a "coiled position" and a "position". unrolled. " In the coiled position, the first ratchet engages a tooth of the gear 44, preventing rotation in the counterclockwise direction (as seen in Figure 2) of the roller tube 30, with respect to the torsion rods 28 and gue it allows clockwise rotation (as seen in Figure 2) of the winder tube 30, relative to the torsion rods 28, such that the awning 20 can be unwound from the winder tube 30. In the position unrolled, the second ratchet engages a gear tooth 44 preventing clockwise rotation of the winder tube 30 relative to the torsion rods 28 and allowing rotation in the counterclockwise direction in the winder tube 30 with respect to to the torsion rods, such that the awning 20 can be wound on the winder tube 30. Figures 5 to 7 illustrate a second type of winder tube structure 18b for the retractable awning structure 12. The winder tube structure illustrated 18b is Model No. 8500 available from Dometic Corporation, Elkhart, Indiana. The roller tube structure 18b includes torsion rods 58, a roller tube 60, rotatably supported by the torsion rod 58 and molded end caps 62 disposed at the ends of the roller tube 60. The torsion rods 58 extend into the ends of the winder tube 60 and through the end caps 62. The outer ends of the torsion rods 58 are supported by the support arms 22 and have molded handles 64 connected. Each handle 64 is generally U-shaped in cross section having a pair of spaced walls 66 extending from a base 68. The torsion rod 58 extends partially through the handle 64 between the walls 66 and is rotatably held with a transversely extending pin 70. Clamped in this manner, the handle 64 is rotatable relative to the pin 70 over a range of approximately 180 °. The end caps 62 generally close the open ends of the roller tube 60 and are held to the roller tube 60 with fasteners 72, such as the rivets shown to rotate therewith. End caps 62 also have an opening or notch 37 adjacent an edge extending from a front face portion to an edge of a flange portion. The bearings 74 rotatably support the roller tube 60 on the torsion rods 58 and rotate with the roller tube 60 relative to the torsion rods 58. Mounted in this manner, the torsion rods 58 define a co-linear support and rotational shaft for the winder tube 60. Winding torsion springs 76 extend relative to the torsion rods 58 within the winder tube 60. The outer end of each torsion spring 76 is attached to the torsion rod 58, with a screw near the cap of end 62 and the inner end of each spring 36 is attached to the bearing 74. When loaded or torque is applied to them, the torsion springs 76 derive the awning structure 12 to the retracted position with the awning 20 wrapped in respect to the tube 60.

At least one end of the roller tube structure 18b is provided with a ratchet structure 78 which limits the rotation of the roller tube 60 to a single direction. The lock structure 78 illustrated includes a gear 80 and a lock member 82. The gear 80 has a plurality of lobes that define stops and is fastened to the torsion rod 58 for rotation therewith. The locking member 82 is located radially outwardly of the gear 80 and is pivotally held in the end cap 62 by a post 84 that extends through a passage in the end cap 62. The safety member 82 has first and second opposing ratchets. A coil spring 86 extends around the torsion rod 58 and has ends secured to the safety member 82 between the pawls and displaced from the post 34. The spring 86 pivots the safety member 82 relative to the post 84, such that one of the detents engages the gear 80 to resist any tendency of the lock member 82 to remain in the neutral position. The securing member 82 is operable by a handle 88 disposed at a post end 84 outside the end cap 62. By operation of the handle 88, the securing member 76 is movable between a "rolled up position" and an "unrolled position". " In the coiled position, the first detent couples a lobe of the gear 80 preventing rotation opposite to the direction of the hands (as seen in Figure 5) of the winder tube 60, with respect to the torsion rods 58 and allowing rotation in the direction of the clock hands (as seen in Figure 2) of the winder tube 60, relative to the torsion rods 58, such that the awning 20 can be unwound from the winder tube 60. In the uncoiled position, the second ratchet engages a gear tooth 80 preventing clockwise rotation of the winder tube 60 relative to the torsion rods 58 and allowing rotation in the counterclockwise direction in the winder tube 60 relative to the rods of twist 58, such that the awning 20 can be wound onto the roller tube 60. When the awning structure 12 is to be moved from the stored position to the retro position When the safety structure 42, 78 is moved to the unrolled position and the pull strip is pulled to move the roller tube structure 18 away from the vehicle. The roller tube 30, 60 rotates to unbolt the awning 20. To retract the awning structure 12 back to the stored position, the secure structure 42, 78 is moved to the rolled-up position by operation of the handle 56, 88, and the bypass of the torsion springs 40, 76 rotates the roller tube 30, 60 to wind the awning 20 in the roller tube 30, 60 and move the awning structure 12 to the side wall of the vehicle 14. The foregoing describes tube structures Known furler 18 and is provided herein to clarify the environment in which the present invention to be described will be employed. It is noted that the present invention is in no way limited to the roller tube structures 18a, 18b previously described. The roller tube structures 18a, 18b described in detail are simply representative of many types of roller tube structures that can be employed with the present invention. Figure 8 illustrates a winding or twisting coil mechanism 90 for applying load or torque to torsion cut-outs 40, 66 in accordance with the present invention. The winding mechanism 90 has the roller tube structure 18 held for a winding operation. The winding mechanism 90 includes an impulse assembly 92, a reception assembly 94 and a control system 96. As best illustrated in Figures 8 and 9, the pulse structure 92 includes the support frame 98, an engine pulse 100 and a band assembly 102. The support frame 98 is dimensioned and configured to cooperate with a plate 104 having a first portion 98a which is located below the top of the plate 104., and a second portion 98b, which extends vertically on the side of the plate 104 from the first portion 98a, to a site on the top of the plate 104. Preferably, the support frame 98 includes a linear bearing 106, in such a way that the frame 98 can move laterally on the side of the plate 104. The impulse motor 100 is mounted transversely in the first portion of the frame 98a, and is located below the upper part of the plate 104. The motor 100 preferably is a three-phase electric motor. The pulse motor 100 is provided with a speed reduction driver 108 having a longitudinally and forwardly extending pulse arrow 110 adjacent the second frame portion 98b. The pulse motor 100 and the speed reduction impeller 108 are preferably capable of operating at rotational speeds and up to approximately 3,400 RPM. A motor and impeller for convenient speed reduction are available from Alien Bradley / Rockwell Automation, Milwaukee, Wisconsin. The band structure 102 includes a feed pulley or first 112, an output or second pulley 114, a pulse belt 116, a secondary pulley 118, and first and second alignment tubes or pins 120, 122. The feed pulley 112 is rotatably mounted at the lower end of the second frame portion 98b. The feed pulley 112 is supported by a feed shaft 124 which is held within convenient bushings. The feed shaft 124 extends rearwardly to the first frame portion 98a. The rotational axis of the feed shaft 124 is substantially co-linear with the rotational axis of the pulse pulse arrow. The feed shaft 112 is connected to the pulse arrow 110 with a convenient pulse coupling 126 for rotation. The output pulley 114 is rotatably mounted on the upper end of the second frame portion 98b. The output pulley 114 is supported by an output shaft 128 which is held in convenient bushings. The rotational axis of the output shaft 128 is substantially parallel with and spaced from the rotational axis of the feed shaft 124. The output shaft 128 extends rearwardly over the top of the plate 104 and the first frame portion 98a. A longitudinally extending key or key 130 is provided on the output shaft 128 to cooperate with the retaining structure 24 as described in more detail below.

The band 116 extends around each of the pulleys 112, 114, such that the exit arrow 128 is rotated when the feed arrow 124 is rotated by the pulse arrow 110. The secondary pulley 118 is assembled in a manner adjustable to the second frame portion 98a adjacent the band 116 and near the feed pulley 112. The secondary pulley 116 is laterally movable towards and away from the band 116, such that an appropriate amount of pressure is applied by the band 116 against the feed pulley 112. The alignment tubes 120, 122 are attached to the upper end of the second frame portion 98b below the outlet arrow 128 and on top of the plate 104. The alignment tubes 120, 122 extend rearwardly from the second frame portion 98b, and each is substantially parallel to the exit arrow 58. The alignment tubes 120, 122 are spaced apart on opposite sides of the arrow of sa FIG. 58. Proximity detectors 132, 134 are located at the rear end of the alignment tubes 120, 122 and are used to identify the retaining structure 124 as described in more detail below. Figures Ia and llb illustrate a first retaining structure 94a, which is adapted to hold any end of the roller tube structure 18a of Figures 2 to 4. The first retention fitting 94a, includes a support 136, a coupler 138 for rotaryly attaching the output shaft 128 to the torsion rod 28 of the roller tube structure 18, and a latch 140 for holding the roller tube 30 of the roller tube structure 18a against rotation. As best illustrated in Figures 12a, 12b the support 136 has front and rear walls 142, 144 that extend upwardly from opposite ends of a base wall 146. The front wall 142 has an opening 148 formed with a recessed hole 150 in it. an inside or front side. The opening 148 and the bore hole 150 are sized to cooperate with the coupler 138 as described in more detail below. The rear wall 144 has an aperture 142 formed, which is dimensioned and configured to receive the end cap 32 of a roller tube structure 18. The aperture 152 is provided with an opposite pair of arcuate notches 154 that are dimensioned and configured to receive the fasteners 36 connecting the end cap 32 to the winder tube 30. A radially projecting hole 156 is provided in the rear wall 144, which extends from the upper surface of the rear wall 144 to the opening 152 in the rear wall. 144. The hole 156 is positioned such that it aligns with the notch 37 in the end cap 32, when the end cap 32 is inside the opening 152. The hole 156 is dimensioned and configured to cooperate with the latch 140. as described in more detail below. A second port 158 is formed generally perpendicular to the first port 156 and has a smaller diameter than the first port 156. The second port 158 is sized to have a pin 160 (FIG. 11b) applied under pressure. The base wall 146 has an upper surface of generally arcuate shape 162 and between the front and rear walls 142, 144. The base wall 147 also has a pair of parallel and spaced holes 164, 166 that are dimensioned and configured to cooperate closely with the first and second alignment tubes 120, 122 of the pulse structure 92. A plug 168 is provided at the rear end of each of the perforations 164, 166. The plugs are sized to cooperate with the proximity detectors 132, 134, when the retaining structure 94a is attached to the pulse structure 92 as described in more detail below. As best illustrated in Figures 13a and 13b the coupler 138 has front, center and rear portions of generally cylindrical shape 170, 172, 174. The front portion 172 is dimensioned and configured to cooperate with the opening 148 of the front support wall 142. The front portion 172 has a flange 176 which is dimensioned to cooperate with the bore hole 150 in the front wall. 142 of the support 136. The front portion 170 also has a blind hole 178 with a keyhole 180 that is sized and configured to receive the key 130 of the exit arrow 128, to rotationally lock the coupler 138 with the exit arrow 128 for rotation with her. The central portion 172 has a diameter generally smaller than the front portion 170 to form a butt confinement therebetween. The rear portion 174 has a diameter generally smaller than the central portion 172 to form a butt confinement therebetween. The rear portion 164 is dimensioned and configured to extend on the torsion rod 28 of the roller tube structure 18a. A notch 182 is formed in the rear portion 174, such that the rear portion 174 generally has a "fork shape". The notch 182 is dimensioned and configured to receive the pin 34 of the roller tube structure 18a to rotationally hold the coupler 138 of the torsion rod 28. As best illustrated in Figures 14a and 14b the lock 140 includes a main body 184, a handle 186 at the upper end of the main body 184 and a tongue tooth 188 at the bottom end of the main body 184. The main body 184 is generally elongated and cylindrical in shape. The main body 184 is dimensioned to fit loosely within the first hole 156 of the bracket 136. A spacing hole 190 is formed laterally through the main body 184 to receive the through pin 160. The handle 186 is generally cylindrical and substantially perpendicular to the main body 184. The handle 186 is preferably provided with a clamping surface such as for example a knurled surface. The tongue 188 is removed within the opening 192 at the lower end of the main body 184. A spring member 194 is provided to bypass the tongue 188 to a fully extended position. The tongue 188 is generally arcuate or curved convex and on each side, except on one side which is concavely curved and dimensioned and configured to cooperate with the notch 34 in the end cap 32 of the roller tube structure 18 during torque application. torque torsion spring 40. As best illustrated in Figure 11b, the insurance 140 is held within the first hole 146 of the support 136 by the pin 160 and is pivotal with respect to the pin 160. The latch 140 is preferably pivotable over a range of about 15 °. The lock engaging or flat side of the tongue 188 is positioned to engage the notch 37 of the end cap 32 when the torsion rod is turned clockwise (as seen in Figure 11b) to avoid rotation of the end cap 32 and the winder tube 30. To secure the winder tube structure 18 within the retaining structure 94a, the pin 34 is installed at the end of the torsion rod 28, if it is not already installed . The end of the front structure 18 then moves horizontally through the upper part of the plate 104 and through the opening 152 in the rear wall 144 of the support 136, until the end cap 32 is within the opening 152. The end cap fasteners 36 should be removed with the notches 154 so that the end cap 32 enters the opening 152. Proper orientation of the fasteners 36 also aligns the notch of the end cap 37 with the lock tab 188. It should be noted that the spring-loaded latch tab 188 is depressed by the end cap 32 as it is inserted and then engaged by rapid actuation in a resilient manner or extends into the notch 76. As best illustrated in FIGS. 15 and 16 When the end cap 32 is completely within the opening 152, the pin of the torsion rod 34 is within the engaging notch 182 and the lock tab 188 is within the notch of the cover. end 37. Clamped in this way, the torsion rod 27 interconnects with the coupler 138 for rotation therewith, and the winder tube 30 interconnects with the latch 140 to prevent rotation of the winder tube 30. From the above description, it can be seen that the roller tube structure 18 is easily installed within and removed from the retaining structure 94a with a simple horizontal sliding movement. Figures 17a and 17b illustrate a second retention structure 94b that is adapted to hold the right-hand end of the reel tube structure 18b of Figures 5 to 7. The retention fitting 94b includes a support 196, a coupler 198. to rotatably join the output shaft 128 with the torsion rod 58 of the roller tube structure 18b, and a latch 140 for holding the roller tube 60 of the roller tube structure 18b against rotation. The latch 140 is the same as described above for the first latch structure 94a. As best illustrated in Figures 18a and 18b the support 196 has front and rear walls 200, 202 projecting upwardly from opposite ends of a base wall 204. The front wall 200 has an opening 206 formed with a recessed bore 208 and an inside or front side. The opening 206 and the bore hole 208 are dimensioned to cooperate with the coupler 198 as described in more detail below. The rear wall 202 has an aperture 210 therein formed, which is dimensioned and configured to receive the end cap 62 of the roller tube structure 18b. The opening 210 is provided with an opposite pair of arcuate notches 212 that are sized and configured to receive the fasteners 72 that connect the end cap 62 to the roller tube structure 18b. A radially projecting orifice 214 is provided in the rear wall 202, which extends from the upper surface of the rear wall 202 to the opening 210 in the rear wall 202. The hole 216 is positioned in such a manner that it aligns with the notch 73 in end cap 62, when end cap 62 is inside opening 210. Hole 216 is sized and configured to cooperate with lock 140 as described above. A second hole 216 is formed generally perpendicular to the first hole 214 and has a smaller diameter than the first hole 214. The second hole 126 is dimensioned to have a pin 218 (Figure 17b) there pressed. The base wall 204 has an upper surface of generally arched shape 220 between front and rear walls 200, 202. The base wall 204 also has a pair of parallel and spaced holes 222 and 224, which are dimensioned and configured to cooperate closely with the alignment tubes 120, 122 of the drive structure 92. A plug 226 is provided at the end of the first perforation 222 (the perforation to the right hand as seen in Figure 17b). The plug 226 is sized to cooperate with the first proximity switch 122, when the retaining structure 94b is fastened to the pulse structure 92 as described in more detail below. As best illustrated in Figures 13a and 13b the coupler 198 has a main body of generally cylindrical shape 228 and first and second arms 230, 232 projecting rearwardly from the main body 228. The main body 228 is dimensioned and configured to cooperate with the opening 206 in the front wall 200 of the support 196. The main body 228 has a flange 234 that is dimensioned to cooperate with the counterbore 208 in the front wall 200 of the support 196. The main body 228 also has a blind hole 236 with a keyhole 238, which is dimensioned and configured to receive the key 130 of the output shaft 128 to rotationally interlock the coupler 198 with the output shaft 128 for rotation. The arms 230, 232 are generally elongated and rectangular in cross section. The arms 230, 232 are dimensioned and configured so that they rotationally lock with the torsion rod 58 of the roller tube structure 18 for rotation therewith. As best illustrated in Figures 20 and 21b the arms 230, 232 are spaced such that the first arm 230 extends between the walls 66 of the handle 64 and the second wall 232 extends laterally outside the walls 66 of the handle 64 to rotationally hold the coupler 198 to the torsion rod 58. To secure the roller tube structure 18b within the second retainer assembly 94b the roller tube structure end 18 moves horizontally through the upper part of the plate 104 and through the opening 210 in the back wall 202 of the support 196 until the end cap 62 is inside the opening 210. The end cap holders 78 should align with the notches 212 so that the end cap 62 enters the opening 210. Proper orientation of the fasteners 78 also aligns the notch of the end cap 73 with the lock tab 188. When the end cap 62 is fully within the opening 210, the twist rod handle 64 is rotationally locked with the coupler arms 230, 232 and the lock tab 188 is within the end cap notch 73. Locked in this manner, the torsion rod 58 is interconnected with the coupler 198 for rotation and the winder tube 60 is interconnected with the lock tab 188 to prevent rotation of the winder tube 60. From the above description it can be seen that the winder tube structure 18b is easily installed inside and removed from the holding structure 94b with a simple horizontal movement. Figures 17a and 17b illustrate a support 240 for a third retaining structure 94c that is adapted to hold the left hand end of the roller tube structure 18 of Figures 5 to 7. The third retainer structure 94 includes the coupler 198 and secure 140 as defined above for the second retention 94b. Additionally, the roller tube structure 18b is clamped within the third retention structure 94c as described above to the second retention fitting 94b. The support 240 is the same as the support 196 for the retaining catch 94b described above, except for the placement of the notches 212 and the hole 214 and the location of the plug 226. Therefore, similar reference numerals are used. for similar structures. The support 240 illustrates that the characteristics of the opening 210 must be matched to the specific end cap 62 to be employed. Agree with this, different furling tube structures or different ends of a single furling tube structure may require different support. The support 240 also illustrates that the cap 226 can be located at a different location, to identify a different type of retainer assembly 94. Figure 23 illustrates diagrammatically the control system 96 for the torque winder 90. The control system 96 includes a controller 242, a variable frequency driver 244, a power supply 246, a bar code scanner 248, a positional proximity sensor 250 and the proximity detectors for tool identification 132, 136. The controller 242 provides the interface of operator, interface for bar code, identification of tools, storage of data, identification of position, and total control. The variable frequency unit 244 provides acceleration control, deceleration and locked position of the pulse motor. A convenient 242 controller and 244 driver are available from Alien Bradley / Rockwell Automation Milwaukee, Wisconsin. The controller 242 is connected to the barcode digitizer 248, to provide identification of the roller tube structure. Each winding tube structure 18 is preferably provided with an identification tag 252 (Figure 8) having a marked bar code. The bar code preferably indicates the model number of the roller tube structure 18, and the appropriate number of turns or revolutions (40 turns) required to obtain a desired load or torque in the torsion spring 40, 78. When the tag 252 is traversed by the barcode scanner 248, the controller 242 identifies the model number and turn count of the winder tube structure 18 to which the tag 252 is affixed. The appropriate turn count is typically up to about 13 revolutions or turns. The controller 242 is pre-programmed with limits or boundaries for the data, so that the procedure can be stopped if the power data is clearly inaccurate. The controller 242 is also connected to the proximity switches 132, 134 located in the alignment tubes 120, 122 to provide tool identification. Having two proximity detectors 123, 134, allows three latching structures 92 to be identified. When no proximity detector 132, 134 indicates that the plug 168, 226 is present, the controller 242 identifies that no reception assembly 94 is installed. When both proximity detectors 132, 134 indicate that a plug 168, 226 is present, the controller 242 identifies that the first type of retaining structure 94a is not installed. When only a first proximity detector 62 indicates that a plug 168, 226 is present, the controller 242 identifies that the second type of retention assembly 94b is installed. When only the second proximity detector 134 indicates that a plug 168, 226 is present, the controller 242 identifies that a third type of retention assembly 94c is installed. It is noted that a greater or lesser amount of proximity sensors 132, 134 can be used to identify a different number of detection assemblies 94. Once the controller 242 identifies the model number of the roller tube structure 18, the controller 242 compares the retention structure 94 identified as installed, if available, with the appropriate retention fitting 94 for the identified reel structure 18. A database of the appropriate retention fitting 94 for various model numbers is stored in the controller 242. If the retention structure 94 is erroneous or the retention structure 94 is not installed, the controller 242 warns the operator and identifies the structure suitable retention 94. The controller 242 will not allow the winding operation to proceed until the appropriate retention structure 94 is installed. The controller 242 also indicates to the operator when the appropriate retention structure 94 is installed. The controller 242 also connects to the variable frequency driver 244 and the positional proximity detector 250, located in the impeller for speed reduction 108, to provide position control. When the operator initiates a winding operation, the controller 242 operates the driving motor 100 from an initial position and accelerates it to a rotational speed of up to approximately 3,400 rpm. The controller 242 counts the number of revolutions as the pulse motor 100 rotates. Full turns are identified by the proximity detector 250. When the last revolution of the appropriate number of turns approaches, the controller 242 brakes the speed of the pulse motor 100. , such that the pulse motor 100 is able to stop at the initial position. The controller 242 stops the pulse motor 100 in the initial position when the proper number of turns has been completed. The pulse motor 100 electronically brakes the structure in such a way that it is locked in the initial position to prevent the torsion spring from unlocking. The controller 242 is able to identify the initial position with the proximity detector 250. Therefore, the pulse motor 100 starts and stops in the same position, the initial position. When the operator indicates that the winding tube structure 18 is manually locked, the controller 242 rotates the thrust motor 100 in the opposite direction by a suitable small distance to remove the accumulated tension. Typically, the drive motor 100 retracts approximately 1 millimeter. The controller 242 preferably has a memory that allows it to stop halfway to a winding operation for a period of time, such as an interruption for food, or during the night and resumes. The controller also preferably signals the operator regarding the next operative stage to be performed. These characteristics allow a winding operation to be interrupted and continue with a low risk of error. A winding operation begins by placing a roller tube structure 18 on the top plate 104 and scanning the identification tag 252, with the bar code scanner 248. The controller 242 identifies the model number and the appropriate number of models. turns from the barcode and chooses the appropriate retention accessory 94 from the previously stored data. The controller 94 then identifies whether the appropriate retention fitting 94 is installed. If the wrong retention fitting 94 is installed or if there is no retention fitting 94 installed, the controller 242 indicates this to the operator and also indicates the appropriate retention fitting 94 to be installed. The operator installs the appropriate retention structure 94 by fully inserting the alignment tubes 120, 122 of the drive structure 92 into the retaining structure 94, and verifying that the exit arrow 128 is rotatably locked with the coupler 138, 198. When the appropriate retention structure 94 is installed, the controller 242 indicates this to the operator. Once the controller 242 informs the operator that the appropriate retention structure 94 is installed, the operator slides the roller tube structure end 18 into the retaining structure 94 as previously described. When the roller tube structure 18 is held in the retaining structure 94, the roller tube is held in place to prevent rotation and the torsion rod is interconnected with the pulse motor 100 for rotation. The operator starts the winding and the controller 242 starts to rotate to the pulse motor 100. The pulse motor 100 rotates the impeller for speed reduction 108 and the associated pulse arrow 110. The pulse arrow 110 rotates the feed arrow 124 , by means of the coupling 126, which rotates the exit arrow 128 by means of the pulleys 112, 114 and the band 116. The exit arrow 128 rotates the coupler 138, 198 that rotates the torsion rod of a roller tube structure 18. According to the Impulse motor 100 rotates, the controller 242 counts the number of revolutions and stops a pulse motor 100 in the initial position after the appropriate number of revolutions has been completed. The impulse motor 100 electronically brakes the structure and interlocks or secures it in the initial position, to avoid spontaneous unwinding. When the appropriate number of revolutions has been completed, the controller 242 informs the operator to manually lock the roller tube structure 18. The operator moves the lock structure 42, 78 to the coiled or coiled position. Additionally, the operator preferably installs a fin pin between the end cap and the torsion rod, for shipping purposes only, because the securing structure 42, 78 can move accidentally during boarding resulting in loss of torque . A roller tube assembly mixture 18 is locked, the initial operator the controller 242 to back the drive motor 100 a small distance to remove any accumulation voltage. It should be noted that the shape of the spring-loaded latch tab 188 causes the tongue 188 to be resilient, when the thrust motor 100 operates in a reverse direction to avoid undesirable binding of the latch 140 and the end cap 32, 62. Once the tension is removed, the controller 242 informs the operator to remove the roller tube structure 18 from the retainer assembly 94. The operator slides the roller tube structure 94 through the top of the plate 104 and out of the retention structure 94. The torque winder 90 is then ready for the next winding operation. It can be seen from the foregoing description, that the method and apparatus of the present invention provide repeatable loading of the torsion springs in a simple form for more than one type of roller tube structure 18. Additionally, the method and apparatus eliminate torsional application. lower and excessive torsion springs. In addition, a single torsion coiler can be used with a variety of different awnings by having interchangeable retaining fittings 94. Although particular embodiments of the invention have been described in detail, it will be understood that the invention is not correspondingly limited in scope, but which includes all changes and modifications that fall within the spirit and terms of the appended claims.

Claims (20)

1. CLAIMS 1.- A method for adding twist to a roller tube structure, which includes a roller tube rotatable with respect to a rod and a torsion spring between the roller tube and the rod, the method is characterized in that it comprises the steps of: coupling the rod to a driving motor of a driving structure; fastening the furling tube in a retaining structure to substantially prevent its rotation; and operating the pulse motor to rotate the rod relative to the winder tube in a first direction by a predetermined number of revolutions; securing the rod to the furling tube to prevent rotation between the rod and the furling tube in a second direction opposite to the first direction; and uncouple the rod and release the roller tube.
2. 2. The method according to claim 1, characterized in that the step of operating the pulse motor includes controlling the pulse motor with a programmable logic controller.
3. 3. - The method according to claim 2, characterized in that it further comprises the step of feeding the predetermined number of revolutions for the tube-tube structure and the model of the tube-tube structure to the controller.
4. 4. - The method according to claim 3, characterized in that the step of feeding the predetermined number of revolutions and the model includes digitizing and identifying the label with a barcode digitizer.
5. 5. - The method according to claim 2, characterized in that it further comprises the step of pre-programming the controller with information regarding an appropriate retaining structure for each of several models of the tube-roller structure and feeding the model of the tube tube structure to the controller.
6. 6. - The method according to claim 5, wherein the step of feeding the model of the roller tube structure includes digitizing an identification tag with a barcode digitizer.
7. 7. - The method according to claim 5, characterized in that it comprises the step of verifying with the controller that the appropriate retention fitting is present.
8. 8. - The method according to claim 2, characterized in that it comprises the step of pointing the operator to the controller with respect to the next stage of the method.
9. 9. - The method according to claim 2, characterized in that it also comprises storing the state of the method in memory of the controller in such a way that the method can be interrupted.
10. 10. - The method according to claim 1, characterized in that the steps of coupling the rod and holding the tube reel each is achieved by inserting one end of the tube tube structure in the retention fitting.
11. 11. The method according to claim 1, characterized in that it also comprises backing the impulse motor by a short distance in the second direction before the step of uncoupling the rod and releasing the roller tube.
12. 12. - A torsion rewinder for adding twist to a roller tube structure, including a reel tube rotatable with respect to a rod and a torsion spring between the reel tube and the rod, the torsion reel is characterized in that it comprises: a impulse structure including a driving motor; a retaining structure attached to the drive motor and including a coupler for connecting the rod to the drive motor for rotation therewith and a latch engagable with the winder tube for holding the winder tube against rotation; and a control system in communication with the impulse motor and including a programmable logic controller.
13. 13. - The system according to claim 12, characterized in that the control system includes at least one proximity detector in communication with the controller to identify the presence of the retaining structure.
14. 14. - The system according to claim 12, characterized in that the control system includes at least two proximity detectors, in communication with the controller to identify the presence of interchangeable retaining fittings.
15. 15. The system according to claim 12, characterized in that the control system includes a proximity detector in communication with the controller to indicate an initial position of the impulse motor.
16. 16. - The system according to claim 12, characterized in that the controller is pre-programmed with limits for a number of revolutions that the roller tube structure can be rotated.
17. 17. - The system according to claim 12, characterized in that the controller is pre-programmed with the appropriate retention structures for various models of the roller tube structure.
18. 18. - The system according to claim 12, characterized in that the control system includes a barcode digitizer in communication with the controller to feed the model of the roller tube structure to the controller.
19. 19. - The system according to claim 12, wherein the coupler is interlocking with the rod to rotationally secure the coupler and rod together and to allow longitudinal movement of the rod with respect to the coupler.
20. 20. The system according to claim 12, characterized in that the latch includes a non-interlocked spring-loaded tongue with the furling tube, to prevent substantially the rotation of the furling tube with respect to the holding structure and to allow longitudinal movement of the structure. roller tube with respect to the retaining structure. SUMMARY OF THE INVENTION The present invention relates to a method and apparatus for adding torsion to a roller tube structure of a retractable awning including a roller tube rotatable with respect to a rod, and a torsion spring between the roller tube and the rod . The model number of the furling tube structure and the required number of turns to obtain the desired torque is fed, by barcode digitizer in a programmable controller. The controller is pre-programmed with data regarding the appropriate retention structures required for various model numbers and limits for data feeding by the barcode scanner. The controller first verifies that the proper retention fitting is present. The rod is coupled to a drive motor for rotation with it and the winder tube is clamped in the retaining structure to substantially prevent its rotation. The rod engages and the furling tube is held only by longitudinal movement of the furling tube structure in the retaining fitting. The impulse motor rotates the rod relative to the winder tube for the number of revolutions fed to add the desired amount of torque. The rod is then secured to the winder tube and disengaged from the drive motor and the winder tube is removed from the retaining fitting.