Patent Publication Number: US-2013252794-A1

Title: Winding machine and winding method

Description:
TECHNICAL FIELD 
     The present invention relates to a winding machine for pipe rehabilitation that rehabilitates an aging pipe and a winding method. 
     BACKGROUND ART 
     The conventional winding machine includes drive roller portions rotated by a hydraulic motor at a plurality of portions. A rehabilitating pipe increases its weight as the rehabilitating pipes are formed. Additionally, since the rehabilitating pipe contacts an existing pipe, friction resistance with the existing pipe increases as a rehabilitating pipe is formed. Therefore, at the drive roller portion at the subsequent part among drive roller portions disposed at a plurality of portions, a driving force required to rotate the rehabilitating pipe gradually increases. In contrast to this, at the drive roller portion at the preceding part, a plastic strip is sent by a driving force that is equal to that of the initial state. As a result, a difference occurs between a rotation speed of the rehabilitating pipe and a supply speed of the plastic strip. That is, the plastic strip is excessively supplied compared with the formation speed of the rehabilitating pipe. This easily causes a problem that the pipe diameter of the rehabilitating pipe gradually increases. 
     In contrast to this, a conventional winding machine  8  illustrated in  FIG. 18  includes a tension roller portion  83  at the upper side of a supporting member as well as a plurality of drive roller portions  81  and  82  (for example, see Patent Literature 1). These plurality of drive roller portions  81  and  82  and tension roller portion  83  are rotatably driven by the respective individual hydraulic motors. Respective hydraulic motors are controlled to have mutually different rotation speeds. That is, the delivery speed of a plastic strip  85  is set slow between the tension roller portion  83  and the drive roller portion  82  compared with the portion between the drive roller portions  81  and  82 . This aims to forcibly pressurize the plastic strip  85  to a mandrel  84  to make the pipe diameter of the rehabilitating pipe uniform. 
     CITATION LIST 
     Patent Literature 
     PATENT LITERATURE 1: Japanese Unexamined Patent Application Publication No. H1-156041 
     SUMMARY OF INVENTION 
     Technical Problem 
     However, the above-described conventional winding machine  8  has problems described below, and there is room for improvement. 
     In the winding machine  8 , the following problems arise. The driving forces of respective hydraulic motors for the drive roller portions  81  and  82  tend to decrease by the braking force of the tension roller portion  83 , and a length of the rehabilitating pipe to be formed is short. Therefore, in the winding machine  8 , a plurality of hydraulic motors need to be synchronously controlled, which requires a complex structure. 
     Additionally, the winding machine  8  has a structure where the rehabilitating pipe is formed by joining the plastic strip  85  from the outer periphery side. When a braking force by the tension roller portion  83  becomes slightly insufficient, the plastic strip  85  to be delivered causes looseness, which gradually increases the pipe diameter of the rehabilitating pipe. Therefore, the conventional problem is not sufficiently eliminated. 
     Further, the plurality of drive roller portions  81  and  82  are disposed on the mandrel  84  at an mutually horizontally opposed position about 180 degrees away. If the winding machine  8  is set up on an invert pit  95  in the manhole  92 , the drive roller portions  81  and  82  interfere with the invert pit  95 . Accordingly, the invert pit  95  and the periphery of the invert pit  95  need to be formed deep to form a housing space  86  for the drive roller portions  81  and  82 . This decreases work efficiency. 
     The present invention has been made in view of these conventional problems. It is an object of the present invention to provide a winding machine configured without a complex structure with a fewer number of components and a winding method where a rehabilitating pipe with a desired pipe diameter can be precisely and constantly formed at a required length. 
     Solutions to the Problems 
     This invention provides a winding machine for forming a rehabilitating pipe by spirally winding a plastic strip. The winding machine includes a frame, an introduction unit, a drive unit, and at least one guide member. The frame includes a plurality of plates and a plurality of rollers. The plurality of plates couples one another in a circumferential direction. The plurality of plates are combined in approximately a ring shape. The plurality of rollers are rotatably disposed between the plates facing one another. The frame is separable into a plurality of pieces. The introduction unit is disposed at the frame. The introduction unit includes an inner roller and an outer roller. The inner roller and the outer roller interpose a preceding part and a subsequent part of the plastic strip in a spirally aligned state. The inner roller and the outer roller include a roller portion. The roller portion does not transmit power at least to the subsequent part of the plastic strip. The drive unit is disposed at the frame. The drive unit includes an inner roller and an outer roller. The inner roller and the outer roller interpose a preceding part and a subsequent part of the plastic strip in a joined state. The inner roller and the outer roller transmit power to the plastic strip. The at least one guide member is disposed at the frame. The guide member guides the plastic strip. The introduction unit and the drive unit are disposed above a horizontal surface including a axial center of the frame. 
     The introduction unit is configured to spirally align the preceding part and the subsequent part without transmitting power to at least the subsequent part of the plastic strip. This allows the drive unit to smoothly draw the plastic strip using the driving force of the drive unit without reducing the driving force. In the introduction unit, the subsequent part of the plastic strip is guided to and drawn into the guide member, and disposed to the preceding part of the plastic strip so as to be adjacent from the inner peripheral side. The plastic strips are joined together in this state and form a rehabilitating pipe. This eliminates the nuisance of gradual increases in the pipe diameter of the rehabilitating pipe, thus forming accurately and stably a rehabilitating pipe with a desired pipe diameter. Further, the introduction unit is configured so as not to reduce the driving force of the drive unit. Therefore, the winding machine can be configured with a simple device structure compared with the conventional winding machine, and therefore a rehabilitating pipe with a longer pipe length than the conventional rehabilitating pipe can be efficiently and stably formed. Additionally, since the frame is separable, the frame can be disassembled and delivered to a pipe manufacturing site such as a manhole, work can be performed in a short time with enhanced versatility. When the winding machine is set up on an invert pit in the manhole, the invert pit, the introduction unit, and the drive unit do not interfere with one another. Accordingly, the winding machine can be installed without cutting the invert pit, work efficiency is improved, and the problems of the conventional winding machine are all eliminated. 
     In the winding machine, the following configuration is preferable. The introduction unit is configured to: position the plastic strip such that the preceding part and the subsequent part of plastic strip are mutually joined together; or position the preceding part and the subsequent part of the plastic strip in the position and mutually join them together. 
     This accurately joins the plastic strips adjacent to one another. The driving force of the drive unit is transmitted without any reduction, and the pipe diameter is not increased, thus allowing highly accurate pipe manufacturing. 
     In the winding machine, the following configuration is preferable. The introduction unit and the drive unit are disposed so as to arrange the drive unit after the introduction unit along a supply route of the plastic strip, and the drive unit draws the subsequent part of the plastic strip through the introduction unit. 
     Accordingly, in a process where the plastic strips are joined together and a rehabilitating pipe is formed, the drive unit interposes the plastic strip that has become the rehabilitating pipe, and sends out the plastic strip in the direction of the tube axis while rotating it. In accordance with the sending of the rehabilitating pipe, the subsequent part of the plastic strip is drawn into the introduction unit and spirally aligned. This allows accurate joining of the plastic strips and continuous stable pipe manufacturing. 
     In the winding machine, the following configuration is preferable. The drive unit includes a reducer and a motor. The drive unit rotates two rollers in mutually opposite directions. 
     This allows rotatably driving the two rollers without configuring a complicated structure. The driving force of the motor can be efficiently transmitted to the rehabilitating pipe and the plastic strip. 
     In the winding machine, the following configuration is preferable. The guide members are disposed at a plurality of positions at the frame so as to define a supply route of the plastic strip at an inner peripheral side of the outline of the frame. 
     Thus, since the plastic strip is supplied through the inner peripheral side of the outline of the frame, the plastic strip is guided smoothly to the introduction unit without interference from an existing pipe or manhole. 
     In the winding machine, the following configuration is preferable. The winding machine further includes a cradle that supports the frame in a state where the frame is suspended. 
     This ensures a stable installation state and also avoids friction resistance caused by contacting the plastic strip to the existing pipe and the manhole, thus allowing smoothly winding the plastic strip to the frame to accurately manufacture a pipe. 
     In the winding machine, the following configuration is preferable. The frame includes a first adjustment mechanism that is disposed on at least one portion among coupling portions between the plates. The first adjustment mechanism adjusts a distance between the plates in a circumferential direction. 
     Accordingly, the outer diameter of the frame can be configured according to the pipe diameters of the rehabilitating pipe and the existing pipe, and the contour length can be adjusted as necessary. This ensures an increased versatility. 
     In the winding machine, the following configuration is preferable. The frame includes a second adjustment mechanism at one portion among coupling portions between the plates. The second adjustment mechanism shifts the plates one another in the direction of the axis. 
     This allows smooth winding of the plastic strip spirally along the frame according to the width of the plastic strip, the pipe diameter of the rehabilitating pipe, or other specifications. This ensures increased versatility. 
     Additionally, a winding method that employs the winding machine with the above-described constitution is also within the technical scope of the present invention. That is, a winding method of the present invention by forming a plastic strip into a rehabilitating pipe includes: installing a winding machine that forms and rotates the rehabilitating pipe at an end portion of a pipe line to be rehabilitated; and supplying a plastic strip to the winding machine. The plastic strip is supplied through a route that passes through an inner peripheral side on an outer extension of the rehabilitating pipe. In a process where the plastic strip is sent forward of the supply route, the method further includes: sending a subsequent part of the plastic strip to the preceding part of the plastic strip from the inner peripheral side of the preceding part and aligning the preceding part and the subsequent part spirally; joining the subsequent part from the inner peripheral side of the preceding part of the aligned plastic strip to form a rehabilitating pipe; and sending out the rehabilitating pipe in a pipe line by rotating the rehabilitating pipe while drawing the subsequent part of the plastic strip to the winding machine. 
     Thus, the subsequent part of the plastic strip is supplied through a route that passes through the inner peripheral side on the outer extension of the rehabilitating pipe and disposed adjacent to the preceding part of the plastic strip. Without interference from an existing pipe or a manhole in the process, the plastic strip is smoothly guided. The plastic strip is not excessively supplied or insufficiently supplied, but preferably supplied. Since the subsequent part of the plastic strip is joined to the preceding part from the inner peripheral side, the nuisance of gradual increase in the pipe diameter of the formed rehabilitating pipe does not occur, and the rehabilitating pipe with a desired pipe diameter can be accurately and stably formed. 
     In the winding method, the following configuration is preferable. The plastic strips include a main joining portion and a sub joining portion. The method includes: mutually joining the preceding portion and the subsequent portion together from an inner peripheral side of the plastic strip; and subsequently joining the main joining portion and the sub joining portion together. 
     Accordingly, the plastic strips can be joined together by two steps. This allows secure joining and the formation of the rehabilitating pipe with high strength and high reliability. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a cross-sectional view illustrating an underground pipe line rehabilitated using a winding machine according to the present invention. 
         FIG. 2  is a perspective view illustrating a winding machine according to one embodiment. 
         FIG. 3  is a front view of the winding machine of  FIG. 2 . 
         FIG. 4  is a perspective view illustrating a first coupling member of a frame in the winding machine. 
         FIGS. 5(   a ) and  5 ( b ) illustrate the frame,  FIG. 5(   a ) illustrates a front view of the frame, and  FIG. 5(   b ) illustrates a plan view of the frame. 
         FIG. 6  illustrates a perspective view illustrating a second coupling member of the frame in the winding machine. 
         FIG. 7  illustrates a side view when an introduction unit constituting the winding machine is viewed from the arrow X direction in  FIG. 3 . 
         FIG. 8  is an explanatory view illustrating a drive unit in the winding machine. 
         FIG. 9  is a perspective view illustrating a state where a rehabilitating pipe is formed with the winding machine. 
         FIG. 10  is an explanatory view schematically illustrating the winding machine and a winding method according to the present invention. 
         FIG. 11  is a schematic perspective view illustrating a state where the winding machine is set up on an invert pit in a manhole. 
         FIG. 12  is a front view illustrating the winding machine according to another embodiment. 
         FIG. 13  is an explanatory view illustrating an introduction unit in the winding machine of  FIG. 12 . 
         FIG. 14  is a perspective view illustrating the winding machine and the winding method according to another embodiment. 
         FIGS. 15(   a ) and  15 ( b ) are explanatory views illustrating one exemplary plastic strip,  FIG. 15(   a ) illustrates a state of joining, and  FIG. 15(   b ) illustrates a state after joining. 
         FIG. 16  is an explanatory view illustrating another exemplary plastic strip. 
         FIGS. 17A and 17B  are explanatory views illustrating yet another exemplary plastic strip,  FIG. 17A  illustrates a state after joining, and  FIG. 17B  illustrates a joining portion of the plastic strip. 
         FIG. 18  is a front view where the conventional winding machine is illustrated by a partial cross section. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, embodiments of a winding machine and a winding method according to the present invention will be described with reference to the accompanying drawings. 
     Winding Machine 
     As illustrated in  FIG. 1 , a winding machine  1  continuously draws a plastic strip  100  and winds the plastic strip  100  spirally. The plastic strip  100  is disposed adjacent one another and mutually joined together with the winding machine  1 . Thus, the plastic strip  100  forms a rehabilitating pipe  10 . Additionally, the winding machine  1  rotates the rehabilitating pipe  10  in the circumferential direction and sends out the rehabilitating pipe  10  to the front of an existing pipe  91  in the axial direction. Simultaneously, the subsequent part of the plastic strip  100  is joined to this rehabilitating pipe  10 , thus the rehabilitating pipe  10  is additionally formed. 
     Specifically, as illustrated in  FIG. 2  and  FIG. 3 , the winding machine  1  includes a drive unit  4  and an introduction unit  5  disposed at the frame  2  and a frame  2 . 
     The frame  2  includes a pair of front and back ring-shaped plates  21  and a plurality of rollers  3  disposed between these ring-shaped plates  21 . These ring-shaped plates  21  are disposed on the front and the back spacing a distance of approximately almost two times the width of the plastic strip  100 . The ring-shaped plate  21  is formed by a plurality of plate materials and is integrally coupled with a plurality of coupling members  23  and  25 . 
     As illustrated in  FIG. 3 , the ring-shaped plate  21  is dividable at an inclined surface C to form two portions: an upper half portion  2 A and a lower half portion  2 B. The inclined surface C is a surface where a horizontal surface that passes through the center of the ring-shaped plate  21  is slightly rotated counterclockwise when the winding machine  1  is viewed from the front. Further, end edge portions of the upper half portion  2 A and the lower half portion  2 B, which are mutually separated approximately 180 degrees, are coupled with the coupling member  23  or the coupling member  25 . 
     As illustrated in  FIG. 4 , a first coupling member  23  is configured with a set of two pieces. The first coupling member  23  includes front and back joining plates  231  and a coupling plate  232 . The front and back joining plates  231  join the end portions of the ring-shaped plates  21 . The coupling plates  232  couple between these joining plates  231 . The joining plate  231  has a plurality of bolt holes to join the ring-shaped plates  21 . The coupling plate  232  determines the distance of the pair of front and back ring-shaped plates  21 . The two coupling members  23  are coupled at a plurality of portions on the coupling plates  232 . This supports the coupling plates  232  in mutually parallel. 
     With an exemplary configuration, a mutual distance between the two coupling members  23  can be adjusted by the amount of tightening of a center bolt  233 , which couples the coupling plates  232 . This allows coupling of the upper half portion  2 A and the lower half portion  2 B while adjusting a distance between them and also allows adjustment of the contour length of the frame  2 . A coil spring is interposed in the shaft portion of the bolt  233  to cause an elastic force between the two coupling members  23 , thus facilitating the adjustment. 
     A plurality of rollers  3  are rotatably supported at the frame  2  spacing a distance in the circumferential direction. As illustrated in  FIG. 5(   a ) and  FIG. 5(   b ), the roller  3  is rotatably supported to a rotating shaft  31  via a bearing  32 . The rotating shaft  31  is disposed across the front and back ring-shaped plates  21 . The roller  3  is formed by a roller body made of synthetic resin or metal. The roller  3  is formed at a length approximately almost two times a width of the plastic strip  100 . The outer diameter of the roller  3  is set such that the outer peripheral surface is positioned slightly outward of the outer periphery line of the ring-shaped plate  21 . This puts the roller  3  in contact with a flat surface of the plastic strip  100 , that is, an inner peripheral surface of the rehabilitating pipe  10 . The roller  3  allows the plastic strip  100  to be smoothly wound, thus reducing contact friction as much as possible. 
     The roller  3  is disposed to form a right angle with respect to a lead angle of the plastic strip  100  constituting the rehabilitating pipe  10 . In view of this, the formed rehabilitating pipe  10  in the existing pipe  91  can be sent out to the front (the pipe manufacturing direction) with the drive unit  4 . 
     These rollers  3  are disposed at a right angle with respect to the lead angle of the plastic strip  100  as follows. For example, as illustrated in  FIG. 2  and  FIG. 3 , the upper half portion  2 A and the lower half portion  2 B are shifted in the axial direction and coupled at one coupling portion positioned above the horizontal surface that passes through the center of the ring-shaped plate  21  among the coupling portions that couple the upper half portion  2 A and the lower half portion  2 B of the frame  2 . 
     As one example,  FIG. 6  and  FIG. 7  illustrate the second coupling member  25  with an adjustment mechanism. The second coupling member  25  with an adjustment mechanism couples the pair of front and back ring-shaped plates  21  shifting them to the axial direction (the pipe axial direction of the rehabilitating pipe  10 ). 
     The second coupling member  25  includes two coupling bodies  251 , which are coupled to be mutually slidable. Each coupling body  251  includes a joining plate  252  and a coupling plate  253 . The joining plate  252  joins the end portions of the ring-shaped plates  21 . The coupling plate  253  connects between these joining plates  252 . One of the coupling body  251  couples the ring-shaped plates  21  constituting the upper half portion  2 A and maintains its mutual distance. The other coupling body  251  couples the ring-shaped plates  21  constituting the lower half portion  2 B and maintains its mutual distance. Additionally, one coupling body  251  includes a slide groove  254  while another coupling body  251  includes a slider  255  to be engaged with the slide groove  254 . 
     The second coupling member  25  includes a long bolt  256 . The long bolt  256  is disposed from the end portion of one coupling body  251  in contact with the joining plate  252  of the other coupling body  251 . Rotation of the long bolt  256  adjusts the amount of slide of the coupling body  251 . The mutually sliding coupling bodies  251  can be secured with a bolt  257  of the slider  255 . 
     This couples the upper half portion  2 A and the lower half portion  2 B and allows the coupling bodies  251  to slide to the pipe axial direction for adjustment while maintaining the mutual distance of the ring-shaped plate  21  in the pipe axial direction. That is, with respect to the upper half portion  2 A, the lower half portion  2 B can be moved by a length approximately corresponding to the width of the plastic strip  100  in the pipe manufacturing direction. Then, with the lower half portion  2 B moved, the upper half portion  2 A and the lower half portion  2 B are coupled, thus the frame  2  is formed. 
     Such frame  2  is delivered to the manhole  92  in a state vertically divided into two of the upper half portion  2 A and the lower half portion  2 B and is assembled to form into a ring at a pipe manufacturing position. This allows installation of the winding machine  1  efficiently in a short time. 
     The upper half portion  2 A of the frame  2  includes the drive unit  4  and the introduction unit  5 . 
     Among these, the drive unit  4  is mounted at approximately the top of the upper half portion  2 A. The drive unit  4  interposes the spiral plastic strip  100  at both surfaces and sends it out. The spiral plastic strip  100  goes along the plurality of rollers  3 . This regulates the inner diameter of the spiral plastic strip  100 . As illustrated in  FIG. 8 , the drive unit  4  includes a paired inner drive roller  41  and outer drive roller  42 . Additionally, the drive unit  4  includes a hydraulic motor  45 . The hydraulic motor  45  rotates and drives the inner drive roller  41  and the outer drive roller  42  in mutually opposite directions via a reducer (for example, a gear  44  of a gear box  43 ) secured to the frame  2 . 
     The rotating shaft of the inner drive roller  41  and the rotating shaft of the outer drive roller  42  are disposed such that the shaft line direction of the rotating shafts is perpendicular to the lead angle of the rehabilitating pipe  10 . Each of these rotating shafts is rotatably supported by the gear box  43  along with an output shaft of the hydraulic motor  45 . Therefore, when the hydraulic motor  45  is rotatably driven, the gears  44 , which are secured to the output shaft, the rotating shaft of the inner drive roller  41 , and the rotating shaft of the outer drive roller  42  and engage one another, rotate the inner drive roller  41  and the outer drive roller  42  in mutually opposite directions. The inner drive roller  41  and the outer drive roller  42  interpose the plastic strip  100 , and sends out the plastic strip  100  to the front along a plurality of rollers  3  disposed at the frame  2 . 
     Both ends of the rotating shaft of the inner drive roller  41  are rotatably supported with the front and back ring-shaped plates  21 . The rotating shaft of the outer drive roller  42  is rotatably cantilevered with the gear box  43  disposed at the front ring-shaped plate  21 . 
     The inner drive roller  41  has a length approximately almost two times the width of the plastic strip  100 . The inner drive roller  41  is formed in a cylindrical shape by a material such as iron. The outer diameter of the inner drive roller  41  is set such that the inner drive roller  41  rotates while the outer peripheral surface of the inner drive roller  41  makes contact with the smooth inner peripheral surface of the rehabilitating pipe  10 . 
     The exemplary plastic strip  100  includes a plurality of ribs  102 , which form a T shape in the cross section, at a strip plate-shaped substrate  101  (see  FIG. 15(   a )). A joint convex portion  103  is disposed upright at one side edge portion of the substrate  101 . The substrate  101  includes a step portion  104  on another side edge portion. The step portion  104  corresponding to the thickness of the substrate  101  is formed to accommodate the side edge portion of the substrate  101  where the joint convex portion  103  is formed. The step portion  104  includes a joint concave portion  105  where the joint convex portion  103  is to be engaged. Additionally, the plastic strip  100  may include an inclined rib  106 . The inclined rib  106  is inclined so as to be positioned at the protruding side of the joint concave portion  105  with increasing distance from the substrate  101 . The inclined rib  106  locks the rib  102  of the adjacent plastic strip  100 . 
     The outer drive roller  42  includes a plurality of large diameter rollers  421  and a plurality of small diameter rollers  422 . The large diameter roller  421  has a width that can be inserted between the adjacent ribs  102  of the plastic strip  100  and is disposed at the rotating shaft. The large diameter roller  421  rotates while its outer peripheral surface contacts the back surface of the substrate  101  of the plastic strip  100  (the surface at the side that becomes the outer peripheral surface of the rehabilitating pipe  10 ) between the adjacent ribs  102  of the plastic strip  100 . 
     The small diameter rollers  422  are formed corresponding to the apical surface (approximately T-shaped part) of the respective ribs  102  of the plastic strip  100 , and are disposed at the rotating shaft. The outer peripheral surface of the small diameter roller  422  rotates in contact with the apical surface of the rib  102  of the plastic strip  100 . Knurling is performed on the outer peripheral surface of the small diameter roller  422 . Thus, the outer drive roller  42  sends out the joined plastic strip  100  (the rehabilitating pipe  10 ) without sliding. 
     In the winding machine  1 , a driving source that rotates the inner drive roller  41  and the outer drive roller  42  of the drive unit  4  is not limited to the hydraulic motor  45 , but an electric motor and an air motor are also applicable. As a reducer, a chain sprocket or similar component may be employed instead of the gear  44 . 
     The introduction unit  5  is, as illustrated in  FIG. 2 , disposed at the former and preceding part of the drive unit  4  at the upper half portion  2 A of the frame  2 . The introduction unit  5  interposes the spiral plastic strip  100 , and positions the plastic strip  100  to the joining position of the joint concave portion  105  and the joint convex portion  103  of the plastic strip  100  or positions and joins them. 
     The introduction unit  5  includes, as illustrated in  FIG. 2  and  FIG. 7 , an inner roller  51  and an outer roller  52 , which are configured in combination. As illustrated in  FIG. 9 , the introduction unit  5  is at the upper half portion  2 A of the frame  2 . The introduction unit  5  is installed at the former part of the drive unit  4 , that is, at the upper stream side in the sending direction of the plastic strip  100 . As illustrated in  FIG. 10 , the introduction unit  5  and the drive unit  4  are disposed above a horizontal surface H including the center of the frame  2  (and the rehabilitating pipe  10 ). 
     The rotating shaft of the inner roller  51  and the rotating shaft of the outer roller  52  are disposed such that the shaft line direction of the rotating shafts is orthogonal to the lead angle of the rehabilitating pipe  10 . Both ends of the rotating shaft of the inner roller  51  are rotatably supported by the front and back ring-shaped plates  21 . The rotating shaft of the outer roller  52  is rotatably cantilevered with a supporting member  27  disposed at the front ring-shaped plate  21 . 
     The introduction unit  5  does not include a power source to rotate these inner roller  51  and outer roller  52 . The plastic strip  100  is drawn and interposed between the inner roller  51  and the outer roller  52 . In accordance with extraction of the plastic strip  100  with the drive unit  4 , the inner roller  51  and the outer roller  52  rotate mutually in opposite directions. 
     The inner roller  51  has a length approximately almost two times a width of the plastic strip  100 . The inner roller  51  is formed in a cylindrical shape by a material such as iron. The outer diameter of the inner roller  51  is set such that the inner roller  51  rotates while the outer peripheral surface of the inner roller  51  makes contact with the smooth inner peripheral surface of the rehabilitating pipe  10 . This positions the joint concave portion  105  of the preceding plastic strip  100  and the joint convex portion  103  of the subsequent spiral plastic strip  100  of the rehabilitating pipe  10  to the joining position, and joins them. 
     It is preferred that the outer roller  52  include a plurality of large diameter rollers  521  and a plurality of small diameter rollers  522  similarly to the above-described outer drive roller  42 . The large diameter roller  521  rotates while its outer peripheral surface contacts the back surface of the substrate  101  of the plastic strip  100 , which is the surface of the side that becomes the outer peripheral surface of the rehabilitating pipe  10 . The small diameter roller  522  rotates while its outer peripheral surface contacts the apical surface of the rib  102  of the plastic strip  100  at the side that becomes the outer peripheral surface of the rehabilitating pipe  10 . Knurling is performed on the outer peripheral surface of the small diameter roller  522 . The outer roller  52  may be a cylindrical roller similarly to the inner roller  51 . 
     As described above, the drive unit  4  rotates and sends out the rehabilitating pipe  10  where the plastic strip  100  has been joined. In contrast to this, the introduction unit  5  smoothly draws the subsequent part of the plastic strip  100  without generating resistance while aligning the subsequent part with the preceding part of the plastic strip  100 , which has become the rehabilitating pipe  10 , by the actuation of the drive unit  4 . The frame  2  forms a space by coupling the upper half portion  2 A and the lower half portion  2 B by shifting them in the pipe axial direction. The plastic strip  100  is drawn into the introduction unit  5  through this space. Thus, the subsequent part of the plastic strip  100  is sent from the introduction unit  5  to the drive unit  4 . 
     The frame  2  includes a plurality of guide members  6  to guide the plastic strip  100  to the introduction unit  5 . The guide member  6  is, as illustrated in  FIG. 2  and  FIG. 9 , formed by coupling a plurality of bar-shaped bodies or plate-shaped bodies into a rectangular shape. The guide member  6  internally includes a space corresponding to the size of the plastic strip  100 . Thus, the guide member  6  positions the plastic strip  100  without variation of both front and back surfaces and the side edge portions of the plastic strip  100 . The plastic strip  100  is inserted through the guide member  6  and held, thus guided to the introduction unit  5 . A bar-shaped body constituting the guide member  6  may be a rotatable roller. Additionally, the constitution of the guide member  6  is not limited to the above-described constitution. The guide member  6  may have a constitution where two frame bodies are assembled to form into an L shape and the guide member  6  guides the end portion of the plastic strip  100 . 
     One end portion of each of the plurality of guide members  6  is attached to the ring-shaped plate  21  of the frame  2 . The guide member  6  is evenly disposed at the ring-shaped plate  21 . The plastic strip  100  is supplied from a drum  94 , and as illustrated in  FIG. 9  and  FIG. 10 , first, is guided to the guide member  6  attached to the upper half portion  2 A, and then guided to the plurality of guide members  6  disposed at the lower half portion  2 B in this order. Thus, the plastic strip  100  includes a supply route at the inner peripheral side (that is, the inner peripheral side on the outer extension of the rehabilitating pipe  10 ) compared to the outline of the frame  2 . 
     The introduction unit  5  interposes both the plastic strip  100  drawn through the guide member  6  (the subsequent part) and the plastic strip  100  of the rotating rehabilitating pipe  10  (the preceding part). The plastic strip  100  drawn into the introduction unit  5  rotates the inner roller  51  and the outer roller  52  of the introduction unit  5  in mutually opposite directions. This sends the plastic strip  100  and the adjacent rehabilitating pipe  10  to the drive unit  4 . 
     In the introduction unit  5 , when the plastic strip  100  is sent out, the joint convex portion  103  of the subsequent plastic strip  100  and the joint concave portion  105  of the preceding plastic strip  100  are disposed at the position where the joint convex portion  103  and the joint concave portion  105  can be mutually joined together. Simultaneously, these are mutually joined together to form into a pipe. 
     The introduction unit  5  may be configured to simply position the plastic strip  100  to a position where joining is allowed without joining. In that case, another mechanism that joins the plastic strip  100  is preferred to be disposed somewhere in a route where the plastic strip  100  that has passed through the introduction unit  5  reaches the drive unit  4 . For example, a joining mechanism may be disposed between the introduction unit  5  and the drive unit  4 . The joining mechanism subsequent to the introduction unit  5  includes a set of rollers that join the plastic strip  100 . Further, the configuration is not limited to the above-described configuration, but the following configuration is also applicable. The joint convex portion  103  and the joint concave portion  105  of the plastic strip  100  are joined at the introduction unit  5 . In the joining mechanism at the subsequent part, the inclined rib  106  of the plastic strip  100  may be locked to the rib  102 . 
     In the winding machine  1 , the frame  2  is preferably supported by a cradle  7 . As illustrated in  FIG. 11 , the cradle  7  includes a plurality of horizontal members  71  and  72  and a plurality of support pillars  73 . The gear box  43  is secured to the horizontal member  71  where both end portions are supported by the support pillars  73 . This supports the frame  2  of the winding machine  1 . Adjusting the coupling height of the support pillar  73  and the horizontal member  71  allows supporting the suspended frame  2 . 
     Winding Method 
     Next, a description will be given of a method for forming the rehabilitating pipe  10  employing the above-described winding machine  1 . 
     As illustrated in  FIG. 1 , the existing pipe  91  includes manholes  92  and  93  at a predetermined span. The rehabilitating pipe  10  is, for example, manufactured from one manhole  92  to another manhole  93  of the existing pipe  91 . The drum  94  and a power unit  96  are installed on the ground at the starting side manhole  92  side. As illustrated in  FIG. 11 , the cradle  7  that supports the winding machine  1  is installed to an invert pit  95  of the starting side manhole  92 . 
     The frame  2  is delivered into the starting side manhole  92  divided into two by the upper half portion  2 A, which includes the introduction unit  5  and the drive unit  4 , and the lower half portion  2 B. The frame  2  is assembled into a ring in the starting side manhole  92 . At this time, the outer diameter of the frame  2  is set according to the pipe diameter of the rehabilitating pipe  10 . 
     The frame  2  of the winding machine  1  is secured to the cradle  7  via the gear box  43 . At this time, the positions of the winding machine  1  in the vertical direction and the horizontal direction are adjusted, and the winding machine  1  is secured in a suspended state with respect to the invert pit  95 . A hydraulic pressure pipe from the power unit  96  is coupled to the hydraulic motor  45  of the drive unit  4 . 
     After such preparatory work is completed, the plastic strip  100  is extracted from the outer periphery side of the drum  94  disposed on the ground and drawn into the starting side manhole  92 . The distal end portion of the plastic strip  100  is inserted through the guide member  6  disposed at the frame  2 , and the plastic strip  100  is guided to the introduction unit  5  of the winding machine  1 . Then, the plastic strip  100  is inserted between the inner roller  51  and the outer roller  52  of the introduction unit  5 . 
     Next, the distal end portion of the plastic strip  100  is inserted between the inner drive roller  41  and the outer drive roller  42  of the drive unit  4 , and the plastic strip  100  is sent to the outer periphery side of the roller  3  of the frame  2 . After that, the hydraulic motor  45  rotatably drives to rotatably drive the inner drive roller  41  and the outer drive roller  42  in mutually opposite directions to send out the interposed plastic strip  100 . 
     The sent plastic strip  100  is wound along the roller  3 . The plastic strip  100  is spirally wound. When the distal end portion of the plastic strip  100  reaches the introduction unit  5  again, the plastic strip  100  is deviated to the arrival side manhole  93  side by the amount corresponding to the width. Accordingly, the distal end portion of the plastic strip  100  can be inserted through the introduction unit  5  again. 
     At this time, as illustrated in  FIG. 15(   a ) and  FIG. 15(   b ), the joint convex portion  103  of the plastic strip  100  at the subsequent side is engaged to the joint concave portion  105  of the plastic strip  100  at the preceding side from the inner peripheral side (the main joining portion). Simultaneously, the side edge portion of the substrate  101  of the subsequent plastic strip  100  (the side where the joint convex portion  103  is disposed) is disposed at the step portion  104  of the preceding plastic strip  100 . The rib  102  at the side where the joint convex portion  103  of the subsequent plastic strip  100  is disposed is locked to the inclined rib  106  of the preceding plastic strip  100  (the sub joining portion). This joins the adjacent plastic strip  100 . 
     Next, the joined adjacent plastic strips  100  are inserted through the drive unit  4  to form a rehabilitating pipe  10 A for starting. That is, the hydraulic motor  45  of the drive unit  4  is driven, and the adjacent plastic strips  100 , which have been joined to one another, are sent out. Furthermore, the plastic strip  100  is wound along the roller  3  and passed through the introduction unit  5  and the drive unit  4  in this order several times to form the rehabilitating pipe  10 A. 
     The hydraulic motor  45  of the drive unit  4  of the winding machine  1  continuously drives. The inner drive roller  41  and the outer drive roller  42  rotatably drive while interposing the rehabilitating pipe  10 A and the plastic strip  100  adjacent to the rehabilitating pipe  10 A. In accordance with this, the plastic strip  100  continued to the latter end of the rehabilitating pipe  10 A is newly drawn into the introduction unit  5 . 
     In the introduction unit  5 , the rehabilitating pipe  10 A, that is, the joint convex portion  103  of the subsequent spiral plastic strip  100  is adjacently disposed from the inner peripheral side to the joint concave portion  105  of the preceding spiral plastic strip  100 . The side edge portion of the substrate  101  at the side where the joint convex portion  103  of the subsequent plastic strip  100  is disposed is positioned at the step portion  104  of the preceding plastic strip  100 , and both are joined together. Furthermore, the rib  102  at the side where the joint convex portion  103  of the subsequent plastic strip  100  is disposed is locked to the inclined rib  106  of the proceeding plastic strip  100  (see  FIG. 15(   a ) and  FIG. 15(   b )). 
     Continuous driving of the hydraulic motor  45  of the drive unit  4  allows the inner drive roller  41  and the outer drive roller  42 , which rotatably drive in the mutually opposite directions, to interpose the joined plastic strip  100 , namely, the rehabilitating pipe  10  together with the starting rehabilitating pipe  10 A, or interpose the rehabilitating pipe  10 . Then, the rehabilitating pipe  10  added to the starting rehabilitating pipe  10 A is sent out to the arrival side manhole  93  while rotating. 
     When the drive unit  4  sends out the rehabilitating pipe  10 , the subsequent part of the plastic strip  100  is newly drawn into the introduction unit  5 . The introduction unit  5  positions and joins the joint convex portion  103  at the subsequent part of the plastic strip  100  to the preceding part of the plastic strip  100 , that is, the joint concave portion  105  of the plastic strip  100  that has become the rehabilitating pipe  10 . 
     During this process, as illustrated in  FIG. 9  and  FIG. 10 , the subsequent plastic strip  100  is guided to the guide member  6 , and the plastic strip  100  is continually supplied through a route that passes through the inner peripheral side on the outer extension of the rehabilitating pipe  10 . In a process that the subsequent plastic strip  100  is sent to the front of this supply route, the subsequent plastic strip  100  is sent to the preceding plastic strip  100  from the inner peripheral side, and the plastic strip  100  is spirally aligned. Thus, the plastic strip  100  aligned in this way is always joined from the inner peripheral side of the preceding plastic strip  100  to form the rehabilitating pipe  10 . This rehabilitating pipe  10  is sent out in the existing pipe  91  with the drive unit  4 . 
     In the winding machine  1 , the driving source is only the hydraulic motor  45  of the drive unit  4 . In the winding machine  1 , a complicated control structure to synchronize a plurality of hydraulic motors is not required. In view of this, the winding machine  1  can be constituted by an extremely simple structure. Accordingly, the winding machine  1  can be manufactured at a low cost. Further, the introduction unit  5  does not include a power portion such as a motor; therefore, the plastic strip  100  is not excessively supplied to the drive unit  4 . The supply amount and the supply speed of the plastic strip  100  are preferably maintained. Accordingly, excessive supply of the plastic strip  100  is prevented, the situation where the pipe diameter of the rehabilitating pipe  10  gradually increases is avoided. 
     Additionally, in the winding machine  1 , a braking force that reduces the driving force of the hydraulic motor  45  does not occur. This prevents the situation of an increase in the pipe diameter of the rehabilitating pipe  10  due to a lack of braking force. Furthermore, all driving force of the drive unit  4  can be utilized to send the rehabilitating pipe  10 . Accordingly, the length of the rehabilitating pipe  10  formed at a time can be increased compared with the conventional apparatus. 
     The rehabilitating pipe  10  is manufactured while always contacting the existing pipe  91 , which curved shape unevenly. A vibration caused by shaking of the rehabilitating pipe  10  in the lateral direction is transmitted to the winding machine  1 . Accordingly, the rehabilitating pipe  10  is attempted to move vertically, horizontally, or other directions with respect to the secured winding machine  1 . The winding machine  1  supports the rehabilitating pipe  10  by interposing it at two portions, which are a position of the inner drive roller  41  and the outer drive roller  42  of the drive unit  4  and a position of the inner roller  51  and the outer roller  52  of the introduction unit  5 . Accordingly, the winding machine  1  can reduce vertical and horizontal movements of the rehabilitating pipe  10 . Thus, slipping out of the rehabilitating pipe  10  from the drive unit  4  by a swinging movement in vertical and horizontal directions can be avoided. 
     When the rehabilitating pipe  10  is formed, the rehabilitating pipe  10  is manufactured by winding the plastic strip  100  at the periphery of the roller  3  of the frame  2 . Thus, the inner diameter of the rehabilitating pipe  10  is always regulated. Accordingly, the plastic strip  100  can be joined from the inner peripheral side of the adjacent plastic strip  100 , and therefore the nuisance of a gradual decrease in the pipe diameter of the rehabilitating pipe  10  does not occur. 
     The winding machine  1  includes the drive unit  4  and the introduction unit  5  at the position above the horizontal surface that passes through the axial center of the existing pipe  91 . That is, as illustrated in  FIG. 10 , the drive unit  4  and the introduction unit  5  are disposed at a position above the horizontal surface H including the axial center of the frame  2  and the axial center of the rehabilitating pipe  10 . In view of this, when the winding machine  1  is installed to the invert pit  95  of the manhole  92 , the drive unit  4  and the introduction unit  5  do not interfere with the invert pit  95 . Accordingly, work such as cutting of the invert pit  95  and the periphery of the invert pit  95  and repair of the cut part is not necessary. Accordingly, the installation work and the clearance work of the winding machine  1  can be performed efficiently, thus shortening a work period. 
     As a result, with the winding machine  1  of a simple structure, the rehabilitating pipe  10  with the desired set pipe diameter can be smoothly formed. The rehabilitating pipe  10  longer than the conventional rehabilitating pipe can be manufactured at a time. 
     As described above, after the rehabilitating pipe  10  is formed across the whole length of the region to be rehabilitated at the existing pipe  91 , the plastic strip  100  at the end portion of the rehabilitating pipe  10  is cut off, and the winding machine  1  is disassembled and cleared from the starting side manhole  92 . Then, the pipe manufacturing work is completed. 
     The above-described embodiment describes the case where the joint concave portion  105  of the preceding plastic strip  100  and the joint convex portion  103  of the subsequent plastic strip  100  in the introduction unit  5  are mutually positioned and joined. The winding machine  1  and the winding method according to the present invention is not construed in a limiting sense. The plastic strip  100  is not necessarily to be joined. 
     For example, if the plastic strip  100  is drawn into the winding machine  1 , the plastic strip  100  is brought up from the drum  94 . At this time, at the position near the manhole  92 , the operator may adjust the extraction amount of the plastic strip  100  from the drum  94  to match it to the amount of pipe to be manufactured. The plastic strip  100  is elastically deformed to a predetermined curvature radius by being wound and stacked to the drum  94 . Therefore, it is difficult for the operator to supply the appropriate amount of the plastic strip  100  according to the amount of the rehabilitating pipe  10  to be manufactured. 
     If the supply amount of the plastic strip  100  becomes short with respect to the amount of the rehabilitating pipe  10  to be manufactured, the joint convex portion  103  of the subsequent part of the plastic strip  100  brought up from the drum  94  moves to the center direction away from the joint concave portion  105  of the preceding plastic strip  100 , with respect to the preceding plastic strip  100  of the rehabilitating pipe  10 . There is a possibility that the plastic strips  100  may not be joined. However, even in this case, the large diameter roller  521  of the outer roller  52  of the introduction unit  5  is disposed between the ribs  102  of the plastic strip  100  at the subsequent part. The large diameter roller  521  positions the subsequent plastic strip  100  such that the joint convex portion  103  of the subsequent plastic strip  100  faces the joint concave portion  105  of the preceding plastic strip  100  (the rehabilitating pipe  10 ). Then in the state, the plastic strip  100  is sent out to the drive unit  4 . 
     Accordingly, with the subsequent part of the plastic strip  100  aligned with the preceding part, the plastic strip  100  is drawn into the drive unit  4 . The inner drive roller  41  and the outer drive roller  42  of the drive unit  4  interpose these plastic strips  100  adjacent to one another. This ensures joining of the joint concave portion  105  and the joint convex portion  103  of the plastic strip  100 , thus forming the rehabilitating pipe  10 . Accordingly, the drive unit  4  forms the rehabilitating pipe  10 , and sends out the rehabilitating pipe  10  forward while rotating it. 
     With a winding method according to the present invention, a position where the winding machine  1  is to be installed may be at the opening end portion of a vertical shaft or the existing pipe  91  as well as inside of the manhole  92 . 
     Other Embodiments 
     The winding machine  1  and a winding method according to the present invention can be embodied and practiced in other different forms as well as the above-described embodiment. Accordingly, the present invention is not limited to the above-described embodiment, and, for example, the constitutions illustrated in  FIG. 12  to  FIG. 14  may be applicable. 
     The winding machine  1  illustrated in  FIG. 12  and  FIG. 13  include the introduction unit  5  that includes a reducer (for example, a gear  57  of a gear box  56 ) and a hydraulic motor  58  to rotate and drive the rotating shafts of an inner roller  53  and an outer roller  54 . This rotatably drives the inner roller  53  and the outer roller  54  in mutually opposite directions. 
     As illustrated in  FIG. 13 , the rotating shaft of the inner roller  53  and the rotating shaft of the outer roller  54  are each rotatably supported to the gear box  56  along with an output shaft of the hydraulic motor  58 . When the hydraulic motor  58  is rotatably driven, gears  57 , which are secured to the output shaft, the rotating shaft of the inner roller  53 , and the rotating shaft of the outer roller  54  and engage one another, and rotate the inner roller  53  and the outer roller  54  in mutually opposite directions. The inner roller  53  and the outer roller  54  interpose the plastic strip  100  and spirally align the preceding part and the subsequent part of the plastic strip  100 . 
     In the introduction unit  5 , the outer roller  54  is configured to not transmit power to the subsequent part of the plastic strip  100 . In the exemplary embodiment, the outer roller  54  includes a roller  54 A and a roller  54 B. The roller  54 A is disposed at approximately a half portion closer to the gear box  56  at the outer roller  54 . That is, the roller  54 A is disposed to the position where the subsequent part of the plastic strip  100  is positioned between the roller  54 A and the inner roller  53 . 
     The roller  54 A and the roller  54 B include, similarly to the outer roller  52 , a plurality of large diameter rollers  541  and a plurality of small diameter rollers  542 . Among these, the diameter of the roller  54 A is reduced such that the outer diameter of the small diameter roller  542  does not contact the rib  102  of the plastic strip  100 . Further, knurling is not performed on the outer peripheral surface of the small diameter roller  542  of the roller  54 A, and the outer peripheral surface is formed to be a smooth surface. This allows the roller  54 A and the inner roller  53  to interpose the plastic strip  100  without transmitting rotation drive force to the plastic strip  100 . In contrast to this, the roller  54 B has a constitution where knurling is performed on the outer peripheral surface of the small diameter roller  542 , and the roller  54 B interposes the preceding part of the plastic strip  100  with the inner roller  53  and transmits rotation drive force. 
     In the winding machine  1  according to this embodiment as well, the plastic strip  100  is not excessively supplied to the drive unit  4 . As a result, the supply amount and the supply speed of the plastic strip  100  are preferably maintained. The situation where the pipe diameter of the rehabilitating pipe  10  gradually increases is avoided, thus enabling accurate manufacture of a pipe while maintaining a uniform pipe diameter. 
     As the introduction unit  5  with a constitution where power is not transmitted at least to the subsequent part of the plastic strip  100 , a bearing may be interposed between the roller  54 A and the rotating shaft of the outer roller  54 . Similarly, a bearing may be interposed between the inner roller  53  and the rotating shaft. 
     The winding machine  1  according to the present invention may be an embodiment illustrated in  FIG. 14 . This winding machine  1  includes an auxiliary roller  59  to further securely join the preceding part and the subsequent part of the plastic strip  100 . The auxiliary roller  59  is disposed between the introduction unit  5  and the drive unit  4  of the frame  2 . 
     The auxiliary roller  59  includes a base portion  591  attached to the frame  2 , a shaft portion  592 , and a disk-shaped roller  593 . The shaft portion  592  extends from the base portion  591  to the outer peripheral surface of the frame  2 . The roller  593  is rotatably supported by the shaft portion  592 . The roller  593  has a common outer diameter with a large diameter roller  543  illustrated in  FIG. 13 . The roller  593  positions the plastic strips  100  at the border adjacent to one another and presses a sub joining portion. That is, the roller  593  engages the inclined rib  106  of the plastic strip  100  at the preceding side with the rib  102  of the plastic strip  100  at the subsequent side (see FIG.  15 ( b )). 
     As described above, the introduction unit  5  positions the plastic strips  100  such that the preceding part and the subsequent part of the plastic strips  100  are allowed to be mutually joined, and mutually joins them together. At this time, in the introduction unit  5 , as illustrated in  FIG. 15(   a ) and  FIG. 15(   b ), the joint convex portion  103  of the plastic strip  100  at the subsequent side is engaged to the joint concave portion  105  of the plastic strip  100  at the preceding side from the inner peripheral side (the main joining portion). However, the rib  102  of the plastic strip  100  does not have to be locked and joined to the inclined rib  106  of the preceding plastic strip  100  (the sub joining portion). In the introduction unit  5 , the plastic strip  100  where the main joining portion has been joined is sent out along the frame  2  and reaches the auxiliary roller  59 . At the auxiliary roller  59 , the sub joining portion of the plastic strip  100  is pressed by the roller  593 , and the preceding part and the subsequent part are securely joined together. This allows secure and strong joining between the adjacent plastic strip  100 , thus forming a highly reliable rehabilitating pipe. 
     Thus, in the winding machine  1  illustrated in  FIG. 14 , the plastic strip  100 , which passes through the introduction unit  5  and the auxiliary roller  59  and is securely and strongly joined, is sent out to the drive unit  4 . In the drive unit  4 , the inner drive roller  41  and the outer drive roller  42  interpose and capture the rehabilitating pipe  10  in a state after joining and provide rotational force to the rehabilitating pipe  10 . This securely transmits the rotational force to the rehabilitating pipe  10 . The rehabilitating pipe  10  is smoothly pushed from the winding machine  1  disposed at the end portion of the pipe line to be rehabilitated in the pipe axial direction. 
     Additionally, in the winding machine  1  and the winding method according to the present invention, the plastic strip  100  constituting the rehabilitating pipe  10  is not limited to the plastic strips  100  illustrated in  FIG. 15(   a ) and  FIG. 15(   b ), for example, the embodiment illustrated in  FIG. 16  is also applicable. In this plastic strip  100 A, a reinforcing material  110  made of a metal plate is attached across a plurality of ribs  102 . The reinforcing material  110  is formed by bending a strip-shaped steel plate in an approximately W shape in the cross section or similar shape. 
     As illustrated in  FIG. 17 , a plastic strip may have a constitution where adjacent main plastic strips  120  are joined together with a joining material  130  to form a rehabilitating pipe. The main plastic strip  120  includes a plurality of ribs  122 , which each have a T shape in the cross section at a substrate  121 , and grooves  123 . The grooves  123  are formed at both end portions of the substrate  121 . The joining material  130  includes fit protrusions  131  that engage the groove  123  of the main plastic strip  120 . 
     The present invention can be embodied and practiced in other different forms without departing from the spirit and essential characteristics of the present invention. Therefore, the above-described embodiments are considered in all respects as illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description. All variations and modifications falling within the equivalency range of the appended claims are intended to be embraced therein. The present application is based on Japanese Patent Application No. 2011-024122, the content of which is hereby incorporated. 
     INDUSTRIAL APPLICABILITY 
     The present invention is effectively utilized to a winding machine and a winding method where a rehabilitating pipe is formed employing a plastic strip. 
     DESCRIPTION OF REFERENCE SIGNS 
     
         
           1  winding machine 
           2  frame 
           21  ring-shaped plate 
           3  roller 
           4  drive unit 
           41  inner drive roller 
           42  outer drive roller 
           44  gear 
           45  hydraulic motor 
           5  introduction unit 
           51  inner roller 
           52  outer roller 
           6  guide member 
           7  cradle 
           10  rehabilitating pipe 
           100  plastic strip