JP2011106561A - Pipe manufacturing machine and method of manufacturing recycled pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel pipe manufacturing machine and a method of manufacturing a recycled pipe capable of effectively inhibiting the floating and bending of a strip and preventing the separation and wind tapering of the strip. <P>SOLUTION: When inserting the recycled pipe into an existing pipe while manufacturing the recycled pipe by helically winding the strip supplied and successively joining one side edge and the other side edge of the strip which helically adjoin to each other, a pressing force for correcting the curvature radius at an inner peripheral face side is applied to one or more places of the inner peripheral face of the strip. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pipe making machine for rehabilitating existing pipes such as aged sewer pipes, water drain pipes, agricultural water pipes, and gas pipes, and a pipe making method for rehabilitating pipes.

  Conventionally, as a method of rehabilitating an existing pipe, a long strip is supplied to a pipe making machine and spirally wound so as to draw an arc along a plurality of guide rollers arranged along an annular guide frame. A means for inserting a rehabilitated pipe into an existing pipe while making the rehabilitated pipe by rotating and sequentially joining one side edge and the other side edge of an adjacent belt-like body has been proposed (for example, the following patent document) 1 and Patent Document 2).

JP 2005-528243 Gazette Special table 2008-536027 gazette

  By the way, recently, a band-like body for improving the self-supporting strength of the rehabilitated pipe has been developed in which a reinforcing strip such as a metal plate is embedded to give rigidity. In the case of using such a high-strength belt in the remanufacturing pipe production by the above-mentioned pipe making machine, the belt-like body is set to have a set radius of curvature simply by feeding it along the guide roller. It is difficult to correct the spiral. If a rehabilitated tube is made with a strip that has not been sufficiently corrected to the set radius of curvature, the following strip rises and peels off from the preceding strip, or during or after pipe making May cause peeling of the belt-like body or so-called thinning (partially generation of an arc portion having a large curvature radius).

  Further, when the weight of the strip is increased due to the embedding of the reinforcing strip, the strip is bent at the top of the rehabilitating pipe, which also causes peeling or thinning of the strip. In particular, such a phenomenon is likely to occur at an early stage when a rehabilitated pipe is manufactured.

  The present invention has been developed to solve such technical problems, and effectively suppresses the lifting and bending of the strip during pipe making, and prevents the strip from peeling or thinning. It is an object to provide a new pipe making machine capable of performing the above and a pipe making method for a rehabilitated pipe.

  The pipe making machine of the present invention (hereinafter referred to as “the present invention machine”) spirally winds the supplied belt-like body, and one side edge and the other side edge of the spiral belts adjacent to each other. The pipe making machine inserts the rehabilitation pipe into the existing pipe while making the rehabilitation pipe by sequentially joining the pipes, and the pipe making machine has an annular guide frame and a gap in the circumferential direction of the guide frame. A plurality of guide rollers that are rotatably supported, a drive mechanism that is provided on the guide frame and supplies a belt-like body, and a guide roller that is provided on the guide frame and that is supplied from the inner peripheral surface. One or a plurality of inner diameter correction devices that apply a pressing force to press in the direction, and the pressing force of the inner diameter correction device so that the supplied belt-like body is wound along the plurality of guide rollers. To correct the radius of curvature of the strip And wherein the Rukoto.

  That is, the machine of the present invention makes a rehabilitation pipe by winding a supplied belt-like body in a spiral shape and sequentially joining one side edge and the other side edge of the spiral-like adjacent belt-like bodies. However, the pipe making machine inserts the rehabilitated pipe into the existing pipe, and includes at least a “guide frame”, a “guide roller”, a “drive mechanism”, and an “inner diameter correction device”.

  The guide frame is an annular support and supports various devices and members to be described later at appropriate places. The size of the guide frame is appropriately determined according to the diameter of the existing pipe and the diameter of the renovated pipe to be manufactured.

  The guide rollers are rotatably supported at a plurality of intervals in the circumferential direction of the guide frame. In the machine of the present invention, along the arrangement of the plurality of guide rollers supported by the guide frame, by contacting the outer peripheral surface of the belt-shaped body to be supplied (the surface on the side that becomes the outer periphery of the rehabilitated tube after pipe forming), The curvature radius of the outer peripheral surface of the strip is sequentially corrected.

  In addition, examples of the strip-shaped body that is manufactured on the rehabilitation pipe by the machine of the present invention include, for example, those provided with reinforcing ribs having an I-shaped or T-shaped cross section that rises along the length direction of the back surface of the substrate. Examples of the ribs include a reinforcing member such as a metal plate embedded in the ribs to increase the self-supporting strength. However, in the machine of the present invention, the shape of the belt-like body is not particularly limited.

  In addition, there are various means such as an adhesive type, a fusion type, and a fitting type as a means for sequentially joining one side edge and the other side edge of the belt-like body. It is not limited.

  The drive mechanism sequentially supplies a long band-like body into the machine of the present invention, and is provided at an appropriate position of the guide frame.

  In the machine according to the present invention, one or more applying a pressing force for pressing the supplied belt-like body in the direction of the guide roller from the inner peripheral surface (the surface on the side of the inner periphery of the rehabilitated pipe after pipe making). The inner diameter straightening device is provided in the guide frame.

  Here, in the production of rehabilitated pipes, if a band with high rigidity and high weight is used, the band will be lifted or bent, which may cause peeling or thinning of the band. Is as described above.

  In this regard, in the machine according to the present invention, the inner diameter regulating device is provided, and the supplied belt-like body is wound along the arrangement of the plurality of guide rollers by the pressing force of the inner diameter correction device. Correct the radius of curvature of the strip. As a result, the lifting and bending of the belt-like body during pipe making can be suppressed, and the strip-like body can be prevented from being peeled off and wound.

  Further, if the inner diameter correcting device is provided, a force (frictional force) for pushing the belt-like body back in the advance direction is generated. And the force which pushes back this strip | belt body becomes a force which presses the strip | belt body which exists between the said internal diameter correction apparatuses from the said drive mechanism toward a guide roller, and it becomes possible to further correct a strip | belt body.

  In addition, it is not specifically limited as a method of giving the pressing force which presses to the guide roller direction from the inner peripheral surface with respect to the strip | belt shaped object supplied in the pipe making machine by the said internal diameter correction apparatus. Specifically, the belt-like body supplied into the pipe making machine is inserted into the gap between the guide roller and the inner diameter correcting device, and a pressing force is applied from the inner peripheral surface of the belt-like body toward the guide roller. do it.

  The shape of the inner diameter straightening device is not particularly limited as long as a pressing force can be applied in the direction of the guide roller from the inner peripheral surface of the belt-like body. In the machine of the present invention, members such as rollers and plates are preferably used. This inner diameter straightening device is usually fixed to a guide frame, but is preferably attached using a fastening means such as a bolt so that it can be removed if necessary. In addition, the distance (gap) between the guide roller and the inner diameter correction device can be adjusted so that the pressing force can be adjusted appropriately, or the elastic member such as a spring is used to make the inner diameter correction device elastic in the direction of the guide roller. Or it may be pressed against.

  The material of the inner diameter straightening device is not particularly limited, but it is predicted that a considerable load is applied to the inner diameter straightening device when the belt-like body is straightened. Therefore, in the machine of the present invention, it is preferable that the inner diameter correction device body is made of a rigid material such as steel. On the other hand, in order to prevent the belt-like body from being damaged, a flexible material such as rubber may be disposed on the portion of the inner diameter correction device that contacts the belt-like body, or the contact surface may be processed smoothly. preferable.

  By the way, in the machine according to the present invention, if the inner diameter straightening devices are arranged at a plurality of locations, the number of locations for correcting the belt-shaped body increases according to the number, and the lifting and bending of the belt-shaped body can be further suppressed.

  However, if a large number of inner diameter correction devices are arranged, the cost increases accordingly. Moreover, the pushing back force of the strip | belt-shaped body by many internal diameter correction apparatuses may give an excessive load with respect to the drive device which supplies a strip | belt-shaped body. Therefore, in the machine of the present invention, it is preferable to effectively arrange as few inner diameter correction devices as possible.

  With regard to this point, as a result of extensive studies by the inventor, in the machine of the present invention, first, the belt-like shape at a position corresponding to the belt-shaped body advance direction 90 to 180 degrees with the top of the annular guide frame as the origin (0 degree). It has been found that it is preferable to apply a pressing force to the body. This is because, in a general pipe making machine, the position where the belt-like body is supplied by the driving mechanism is arranged at a position corresponding to the belt-like body advancement direction of 45 to 90 degrees with the top of the annular guide frame as the origin. The belt-shaped body supplied by the drive mechanism is focused on the point that it is most likely to float at a position corresponding to the band-shaped advancing direction 90 to 180 degrees with the top of the annular guide frame as the origin.

  Accordingly, when the machine according to the present invention is provided with an inner diameter straightening device, the inner diameter straightening device corresponds to 90 to 180 degrees, more preferably 100 to 170 degrees, in the belt-shaped body advancement direction with the top of the annular guide frame as the origin. If a pressing force is applied to the belt-like body at the position where the belt-like body is to be lifted, lifting of the belt-like body can be effectively suppressed.

  In addition, the position corresponding to the band advance direction 90 to 180 degrees with the top of the annular guide frame as the origin is the surface of the water when constructing the rehabilitation pipe in a pipe where there is running water or stagnant water such as a sewer pipe. It is in a position where it will be submerged. That is, in this case, the pressing on the belt-like body by the inner diameter correcting device is performed under water.

  Then, this pressing in water will quickly cool while pressing the joint, particularly when using heat fusion or a hot-melt adhesive for joining the belts together. Synergistic effects such as improvement can be obtained.

  On the other hand, the inventor has also found that it is preferable to apply a pressing force to the band-like body at a position corresponding to the vicinity of the top of the annular guide frame in the machine of the present invention. This pays attention to the fact that when a belt-like body having a large weight is supplied, there is a tendency to bend due to its own weight in the vicinity of the top of the annular guide frame.

  Accordingly, when the machine according to the present invention is provided with the inner diameter straightening device, the inner diameter straightening device corresponds to ± 45 degrees (preferably ± 30 degrees) at least near the top of the annular guide frame, specifically, with the top as the origin. If a pressing force is applied to the band-like body at the position to be bent, the bending of the band-like body due to its own weight can be effectively suppressed.

  Of course, with two inner diameter correction devices, two strips at a position corresponding to the band advance direction 90 to 180 degrees with the top of the annular guide frame as the origin and a position corresponding to the vicinity of the top of the annular guide frame. On the other hand, if a pressing force is applied to the belt-like body, the lifting and bending of the belt-like body can be further effectively suppressed.

  The method for producing a rehabilitated pipe according to the present invention (hereinafter referred to as the present invention method) comprises a spirally wound belt-like body, and one side edge and the other side edge of the spirally adjacent belt-like bodies. It is a method of making a rehabilitation pipe that is inserted into an existing pipe while making the rehabilitation pipe by sequentially joining the parts, and this pipe making method is performed on the outer peripheral surface side of the belt-like body wound spirally. While the curvature radius is corrected, a pressing force for correcting the curvature radius on the inner peripheral surface side is applied to one or a plurality of locations on the inner peripheral surface of the belt-like body.

  That is, in the method of the present invention, a rehabilitating pipe is produced by winding a supplied belt-like body in a spiral shape and sequentially joining one side edge and the other side edge of the adjacent belt-like belts. However, the rehabilitation pipe is produced by inserting the rehabilitation pipe into the existing pipe.

  In the method of the present invention, the curvature radius on the outer peripheral surface side of the belt-like body wound spirally is corrected, while the curvature on the inner peripheral surface side with respect to one or a plurality of locations on the inner peripheral surface of the belt-like body. A pressing force for correcting the radius is applied.

  That is, in the method of the present invention, the curvature radius on the outer peripheral surface side of the spirally wound strip is corrected, while the curvature on the inner peripheral surface side with respect to one or a plurality of locations on the inner peripheral surface of the strip. Since the pressing force for correcting the radius is applied, the lifting and bending of the belt during pipe making can be suppressed, and the strip can be prevented from being peeled off or thinned.

  According to the present invention, it is possible to effectively prevent the belt-like body from being lifted or bent during pipe making, and thus to prevent the belt-like body from peeling or thinning.

FIG. 1 is a perspective view (a) and a cross-sectional view (b) showing an example of a belt-like body used in the present invention. FIG. 2 is a cross-sectional view illustrating a process of joining the strips of FIG. 1 ((a) molten resin application process, (b) joining process). FIG. 3 is a perspective view showing an example of the pipe making machine according to the present invention for carrying out the method for producing a rehabilitated pipe according to the present invention. FIG. 4 is a perspective view in which a part of the drive mechanism of the pipe making machine shown in FIG. 3 is omitted. FIG. 5 is a plan view showing the pinch roller of the drive mechanism shown in FIG. 4 together with the belt-like body. FIG. 6 is an enlarged perspective view of one of the inner diameter correction devices provided in the pipe making machine shown in FIG. FIG. 7 is an enlarged perspective view showing another side of the inner diameter correction device provided in the pipe making machine shown in FIG. FIG. 8 is a schematic view showing a winding state of a belt-like body by a conventionally known pipe making machine. FIG. 9 is a schematic diagram showing a winding state of the band according to the present invention. FIG. 10 is a schematic view showing a winding state of the band according to the present invention. FIG. 11 is a schematic view showing a winding state of the band according to the present invention in the presence of water. FIG. 12 is a cross-sectional view (a) showing another example of the belt-like body used in the present invention, and a cross-sectional view (b) showing a joined state thereof. FIG. 13: is sectional drawing (a) which shows the other example of the strip | belt-shaped body used for this invention, and a perspective view (b) which shows the joining state.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments.

  First, prior to describing the embodiment of the present invention, the strip 100 used will be described.

  A strip 100 shown in FIG. 1A is formed by extrusion molding a flexible synthetic resin such as polyethylene or polypropylene. The belt-like body 100 is rolled up in a hollow cylindrical shape and transported to the site. In the band-like body 100, a plurality (three in the embodiment) of ribs 102 having an I-shaped cross section are formed on the back surface of a band-like substrate 101 so as to be orthogonal to the substrate 101. A stepped portion 103 is formed on one side edge (hereinafter referred to as one side edge) of the substrate 101, which is stepped down to the back side by the thickness of the substrate 101. This is such that when the belt-like body 100 is spirally wound, the other side edge portion (hereinafter referred to as the other side edge portion) of the substrate 101 in the adjacent belt-like body 100 can be arranged. It is.

  As shown in the cross-sectional view of FIG. 1B, a reinforcing strip 104 such as a steel plate is embedded in each rib 102. That is, the strip 100 has high rigidity due to the presence of the reinforcing strip 104, and its own weight is also large.

  Such a belt-like body 100 is supplied to the pipe making machine 1 to be described later and is spirally wound so that the back surface side of the substrate 101, that is, the side where the ribs 102 are erected is the outer peripheral surface. At this time, as shown in FIG. 2A, the molten resin c is applied to one side edge (stepped portion 103) of the succeeding belt-like body 100 out of the two belt-like bodies 100, 100 adjacent to each other. . Next, as shown in FIG. 2 (b), one side edge portion of the subsequent strip-shaped body 100 to which the molten resin c is applied is placed outside the other side edge portion of the preceding strip-shaped body 100 (of the preceding strip-shaped body 100. By overlapping from the outer peripheral surface side), one side edge (stepped portion 103) of the substrate 101 of the subsequent strip 100 is arranged and joined to the other edge of the substrate 101 of the preceding strip 100, The rehabilitation pipe S having a predetermined pipe diameter is manufactured.

  Next, the pipe making machine 1 according to the present embodiment will be described with reference to FIGS. 3 to 7.

  The pipe making machine 1 includes a guide frame 2, a plurality of guide rollers 3 rotatably provided at intervals in the circumferential direction of the guide frame 2, and the other side of the belt-like body 100 that is spirally wound and preceded. The driving mechanism 4 that overlaps the edge and the one side edge (stepped portion 103) of the belt-like body 100 that is subsequently supplied to the pipe making machine 1, sandwiches and feeds the adjacent belt-like bodies 100, 100, and the pipe making It comprises an extrusion welding machine 5 that softens one side edge 103 of the strip 100 supplied to the machine 1 and applies a molten resin c, and an inner diameter correction device 6 (6a, 6b).

  The guide frame 2 is formed by integrally connecting a pair of front and rear annular frames 21 and 21 with a plurality of connecting members 22 at intervals in the circumferential direction. The guide frame 2 is divided into a plurality of pieces (three in this embodiment, 120 degrees each). The guide frame 2 is carried into the manhole in a divided state, and is assembled in an annular shape in the manhole. .

  The front annular frame 21 has a part of an arc bent in an L shape inward corresponding to the drive mechanism 4 and the extrusion welder 5 described later. An arcuate auxiliary frame 23 is positioned between the front and rear annular frames 21 and 21 at a portion corresponding to the bent portion 211 and is connected to the rear annular frame 21 via a connecting member 22.

  The guide roller 3 is rotatably supported via a bearing (not shown) around each connecting shaft 31 fixed between a pair of front and rear annular frames 21 and 21 constituting the guide frame 2.

  However, the portion of the guide roller 3 corresponding to the bent portion 211 of the front annular frame 21 is rotatably supported between the auxiliary frame 23 and the rear annular frame 21, and between the front and rear annular frames 21, 21. The guide roller 3 is provided with a substantially half length.

  In the present embodiment, the guide roller 3 is made of metal or synthetic resin. The guide roller 3 is formed with a plurality of grooves 3a (see FIG. 4) having a width and depth that can accommodate the ribs 102 of the belt-like body 100 with a margin. The groove 3 a is formed corresponding to each rib 102 of the belt-like body 100, and is configured such that the outer peripheral surface of the guide roller 3 can contact the back surface of the substrate 101 in the belt-like body 100. In addition, when the belt-like body 100 whose outer peripheral surface is corrected by the guide roller 3 and wound spirally is rotated 360 degrees once, the width of the belt-like body 100 with respect to the belt-like body 100 to which the preceding belt-like body 100 follows. Is set so as to be shifted forward by a length corresponding to. That is, the mounting position of the guide roller 3 in the tube axis direction with respect to the connecting shaft 31 is adjusted so that the groove 3a gradually shifts in the tube axis direction as the circumferential direction moves. Further, although not shown in detail, a roller portion corresponding to one side edge portion (stepped portion 103) of the belt-like body 100 in the guide roller 3 is formed to have a slightly smaller diameter than the other roller portions.

  The drive mechanism 4 includes a mounting frame 41 fixed to the guide frame 2 using a space between the bent portion 211 of the annular frame 21 in front of the guide frame 2 and the auxiliary frame 23, and a pinch roller provided on the mounting frame 41. 42 (an outer roller 421 and an inner roller 422), a hydraulic motor (not shown) for rotating the pinch roller 42, and a speed reduction mechanism 43.

  Here, the speed reduction mechanism 43 shows only the sprocket 431 provided on the output shaft of the hydraulic motor provided on the mounting frame 41 and the rotation shaft of the outer roller 421 (only the sprocket provided on the rotation shaft of the outer roller 421 is shown in FIG. .), The chain 432 wound between the sprockets 431, and the gears 433 and 433 which are respectively provided on the rotating shaft of the outer roller 421 and the rotating shaft of the inner roller 422 and mesh with each other. That is, the speed reduction mechanism 43 rotates the hydraulic motor to rotate the outer surface roller 421 via the sprocket 431 and the chain 432, and also moves the inner surface roller 422 to the outer surface roller 421 via the meshing gears 433 and 433. The rotating direction is opposite to the rotating direction.

  The outer surface roller 421 rotates in contact with the back surface of the substrate 101, that is, the outer surface of the renovated pipe S, between the adjacent ribs 102, 102 of the belt-shaped body 100. At this time, the outer peripheral surface of the outer roller 421 is knurled so that the belt-like body 100 can be fed out without slipping.

  In addition, the roller at a position corresponding to the one side edge (stepped portion 103) of the outer roller 421 is formed to have a slightly smaller diameter than the other rollers and is not subjected to knurling.

  On the other hand, the inner surface roller 422 is formed in a cylindrical shape from a relatively hard material such as iron or plastic, and the outer peripheral surface thereof is the flat surface of the substrate 101 in the belt-shaped body 100, that is, the inner peripheral surface of the rehabilitation pipe S. Rotates in contact with the surface on the side.

  The extrusion welding machine 5 supports the screw in the heating cylinder 51 so as to be rotatable via a hydraulic motor. That is, in the heating cylinder 51, the supplied plastic resin is melted, and the molten resin is extruded from the extrusion nozzle 52 using the screw. The extrusion welding machine 5 faces the one side edge (step 103) immediately before the extrusion nozzle 52 is supplied to the pinch roller 42 of the drive mechanism 4 in the pipe making machine 1 in a substantially contact state. As described above, the guide frame 2 is fixed.

  When joining adjacent belt-like bodies 100, 100 with a molten resin, not only one side edge of the following belt-like body 100 but also one of the preceding belt-like bodies over which one side edge of the following belt-like body 100 is superimposed. It is preferable to soften the side edge portion in a substantially molten state.

  In the pipe making machine 1 of the present invention according to the present embodiment, the position corresponding to about 120 degrees in the advancing direction of the strip 100 with the top of the guide frame 2 as the origin and the position corresponding to the top of the guide frame 2 are two. An inner diameter straightening device 6 (6a, 6b) is provided for applying a pressing force for pressing the belt-like body 100 in the direction of the guide roller 3 from the inner peripheral surface. 6 and 7 are enlarged views of the respective inner diameter straightening devices 6 (6a, 6b).

  As shown in the enlarged view of FIG. 6, the inner diameter provided to apply a pressing force to the strip 100 at a position corresponding to about 120 degrees in the advancing direction with the top of the annular guide frame 2 as the origin. The straightening device 6a has a configuration in which a roller-shaped pressing member 61 is rotatably supported at the tip of an arm member 62 fastened and fixed to the front annular frame 21. The arm member 62 and the pressing member 61 in the inner diameter straightening device 6a are mostly made of a steel material in order to ensure strength. However, in order to prevent damage to the belt-like body 100, the circumference of the pressing member 61 is reduced. Rubber is arranged on the surface. In addition, the gap formed by the pressing member 61 and the guide roller 3 can be adjusted as appropriate by adjusting the fastening position of the arm member 62, whereby the pressing force can be adjusted.

  On the other hand, as shown in the enlarged view of FIG. 7, the inner diameter correction device 6 b provided to apply a pressing force to the belt-like body 100 at a position corresponding to the top of the annular guide frame 2 includes the front annular frame 21. A bolt member 64 that can be advanced is provided at the tip of the arm member 62 that is fastened and fixed to the arm member 62, and a plate-shaped pressing member 61 is supported on the upper end of the bolt member 64. The pressing member 61, the bolt member 64, and the arm member 62 in the inner diameter correcting device 6b are made of steel as a raw material in order to ensure strength. Further, the pressing member 61 is curved so as to follow the inner peripheral surface of the wound belt-like body 100. Further, the gap formed by the pressing member 61 and the guide roller 3 can be appropriately adjusted by adjusting the advance position of the bolt member 64 disposed at the tip of the arm member 62. Further, the pressing member 61 is elastically pressed toward the guide roller 3 by the elastic force of the spring member 63 provided in the bolt member 64. The elastic force of the spring member 63 can be adjusted as appropriate, and the pressing force can be adjusted together with the adjustment of the advance position of the bolt member 64.

  Next, the advantage in the case of renewing an existing pipe using the pipe making machine 1 of the present invention configured as described above will be described with reference to the drawings.

  FIG. 8 is a diagram schematically showing the supply and winding state of the belt-like body 100 in the arrow direction during pipe making by a conventionally known pipe making machine not equipped with the inner diameter correction device 6.

  When the belt-like body 100 supplied to the pipe making machine 4 by the drive mechanism 4 has high rigidity, it is difficult to wind the belt-like body 100 along the guide rollers 3 arranged around the guide frame 2. Such a high-strength belt-like body 100 tends to be lifted easily at a position (A in the figure) corresponding to the advancing direction 90 to 180 degrees with the top of the annular guide frame 2 as the origin. Then, this lifting causes peeling of the belt-like body 100 or so-called thinning.

  Further, when the dead weight of the belt-like body 100 increases, the belt-like body 100 is easily bent particularly at a position corresponding to the top portion (B in the figure) of the annular guide frame 2, which may cause peeling or thinning of the belt-like body 100. Become.

  In this regard, when the renovated pipe S is produced by the pipe making machine 1 of the present invention, the strip-like body 100 advances 90 to 180 with the top of the annular guide frame 2 as the origin as shown in FIG. Since the pressing force F directed from the inner peripheral surface toward the guide roller 3 is applied to the belt-like body 100 at a position corresponding to the degree (A in the figure), the lifting of the belt-like body 100 can be effectively suppressed, Thus, the strip 100 can be prevented from being peeled off or wound.

  Further, when the rehabilitated pipe S is produced by the pipe making machine 1 of the present invention, when the pipe is produced, as shown in FIG. 9, the belt-like body at the position corresponding to the top portion (B in the figure) of the annular guide frame 2 is used. Since the pressing force F directed from the inner peripheral surface toward the guide roller 3 is applied, the bending of the belt-like body 100 due to its own weight can be effectively suppressed.

  Furthermore, as shown in FIG. 10, when a pressing force F is applied from the inner peripheral surface of the belt-shaped body 100 toward the guide roller 3, a force (friction force) μ that pushes the belt-shaped body 100 back in the advancing direction is generated. The force μ that pushes back the belt-like body 100 is a force that presses the belt-like body at the position where the pressing force F is applied from the drive mechanism 4 toward the guide roller 3, and the belt-like body 100 can be further corrected. It becomes.

  In addition, the position (A in the figure) corresponding to the advancing direction 90 to 180 degrees with the top of the annular guide frame 2 as the origin is rehabilitated in a pipe having running water or stagnant water such as a sewage pipe. When constructing the pipe, it will be in a position where it will be submerged under the surface of the water. That is, as shown in FIG. 11, the pressing in the direction of the guide roller 3 with respect to the belt-like body 100 at this position is performed underwater.

  This pressing under water, particularly when using heat fusion or a hot-melt adhesive for joining the strips 100, cools quickly while pressing the joint, further improving the joint strength. Synergistic effects can be obtained.

  By the way, in the above-described embodiment, the band-like body 100 including the reinforcing rib 102 having the I-shaped cross section along the back surface length direction of the substrate 101 as shown in FIG. 1 is used. The invention is not limited to the belt-like body 100 having such a shape. For example, the invention has a cross section along the back surface length direction of the substrate 101 as shown in FIGS. 12 (a) and 13 (b). A belt-like body 100 provided with a T-shaped reinforcing rib 102 can also be used. Further, the joining means of the belt-like body 100 is not limited to the case where a molten resin is used. For example, a male mold 105 provided on one side edge of the belt-like body 100 as shown in FIG. Fitting means for fitting into a female mold 106 provided in the above, or fitting means for fitting a separate fitting material 107 into an engaging portion formed between adjacent strips 100 as shown in FIG. 13B. Also good.

DESCRIPTION OF SYMBOLS 1 Pipe making machine 2 Guide frame 3 Guide roller 4 Drive mechanism 5 Extrusion welding machine 6 Inner diameter correction apparatus 100 Strip-shaped body S Rehabilitation pipe F Pressing force μ Pushing force

Claims (4)

The rehabilitating pipe is installed while the rehabilitating pipe is formed by winding the supplied belt-like body in a spiral shape and sequentially joining one side edge and the other side edge of the adjacent belts in the spiral shape. A pipe making machine that is inserted into a pipe,
Annular guide frame,
A plurality of guide rollers rotatably supported at intervals in the circumferential direction of the guide frame, a drive mechanism provided on the guide frame and supplying a belt-like body;
And one or a plurality of inner diameter correction devices that are provided on the guide frame and apply a pressing force that presses the supplied belt-shaped body from the inner peripheral surface toward the guide roller,
A pipe making machine, wherein the radius of curvature of the belt-like body is corrected by the pressing force of the inner diameter correction device so that the supplied belt-like body is wound around the plurality of guide rollers.   2. The pipe making machine according to claim 1, wherein the inner diameter correction device applies a pressing force to a band-shaped body at a position corresponding to a band-shaped body advance direction of 90 to 180 degrees with at least the top of the annular guide frame as an origin. Pipe making machine.   3. The pipe making machine according to claim 1, wherein the inner diameter correction device applies a pressing force to a belt-like body at a position corresponding to at least the vicinity of the top of the annular guide frame.   The rehabilitating pipe is installed while the rehabilitating pipe is formed by winding the supplied belt-like body in a spiral shape and sequentially joining one side edge and the other side edge of the adjacent belts in the spiral shape. A method for producing a rehabilitated pipe to be inserted into a pipe, wherein the pipe making method corrects the radius of curvature on the outer peripheral surface side of the belt-like body wound in a spiral manner, while correcting the radius of curvature on the inner peripheral surface of the belt-like body. Or the pressing method which corrects the curvature radius of an inner peripheral surface side is provided with respect to several places, The pipe making method of the rehabilitation pipe | tube characterized by the above-mentioned.

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