JP2010023350A - Tube forming apparatus and method for forming tubular body using the tube forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maintain the tube diameter of a formed tubular body at a constant dimension without causing slackness to a strip member when winding the long strip member spirally to form the tubular body for renovating an existing pipe. <P>SOLUTION: A molding frame 2 installed on the inner periphery of the existing pipe 200 includes freely rotatably journaled guide rollers 50, a supply unit 60 for forcibly supplying the strip member 100 from the inside of the molding frame 2, and a joining unit 40 clamping the strip member 100 that has passed through the supply unit 60, from the inside and outside of the molding frame 2 to join this strip member 100 to a joint part of the already wound strip member 100. Tension is applied to the strip member 100 between the supply unit 60 and the joining unit 40 to maintain the tube diameter of the formed tubular body 130 to the constant dimension. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a pipe for producing a tubular body formed by spirally winding a long belt-like member around an inner peripheral surface of an existing pipe such as an agricultural water pipe, a sewer pipe, a water pipe, or a gas pipe. The present invention relates to an apparatus and a method for producing a tubular body using the apparatus.

  In existing pipes such as agricultural water pipes, sewer pipes, and water pipes, existing pipes are lined with synthetic resin etc. as a countermeasure when the existing pipes become obsolete due to cracks or corrosion. The method to rehabilitate is taken.

  As a method of lining the inner peripheral surface of such an existing pipe, a long belt-like member having joints formed on both side edges is spirally wound in the existing pipe to produce a lining tubular body. The method of tube is well known. For example, as described in Patent Document 1, a drum around which a belt-shaped member is wound is installed on the ground, a pipe making device is arranged in an existing pipe, and the belt-like member is continuously supplied from the drum to the pipe making device. Then, there is a method of forming a tubular body by spirally winding and joining adjacent joining portions of the belt-like member. The formed tubular body is left as it is in the existing pipe, and a strip-shaped member is newly supplied in front of the tubular body, so that the tubular bodies having the same shape are sequentially formed.

  As shown in FIG. 12, for example, a pipe making apparatus used for rehabilitating this type of existing pipe includes a forming frame 310 formed in an annular shape by pivotally supporting a plurality of guide rollers 320, and both side edges of the belt-like member 600. The joining mechanism part 330 for joining these joining parts is provided, and the joining mechanism part 330 is configured by an outer roller 331 and an inner roller 332.

  When the tubular body 610 is made by the pipe making apparatus 300, the outer roller 331 moves around along the inner peripheral surface of the existing pipe 200. However, since the inner peripheral surface of the existing pipe 200 has irregularities, the outer roller 331 is caught by the irregularities and the outer roller 331 is damaged, or the formed tubular body 610 is smaller than the inner diameter of the existing pipe 200. There is a disadvantage that a gap is formed between the existing pipe 200 and the tubular body 610.

  In addition, when a gap is formed between the existing pipe 200 and the tubular body 610, the tubular body 610 cannot be fixed to the existing pipe 200, and thus when a large amount of water suddenly flows in the tubular body 610. The tubular body 610 is displaced in the tube axis direction due to the water force, or soil water enters the gap between the existing pipe 200 and the tubular body 610, and external force due to the soil water is applied to the tubular body 610. , 600 may be disconnected from each other. Therefore, a backfilling material is injected and filled into the gap between the existing pipe 200 and the tubular body 610 to fix the tubular body 610 to the existing pipe 200. In this case, the formed tubular body 610 has a drawback that the inner diameter is smaller than that of the existing pipe 200 and a cross-sectional loss occurs.

  Therefore, as described in Patent Document 2, for example, a pipe manufacturing apparatus has been proposed in which a tubular body for lining is formed over the entire cross section of the pipe rod so that the cross section loss is minimized. A plurality of guide rollers are rotatably mounted on the forming frame, and are configured to abut on the inner surface of a tubular body formed by winding a belt-like member in a spiral shape. A guide roller is arrange | positioned so that it may become a right angle with respect to the strip | belt-shaped member which comprises a tubular body, and maintains the strip | belt-shaped member wound spirally in a tubular shape.

In this type of pipe making apparatus, the tubular member for the first few turns is unwound by first pulling the band-shaped member from the manhole and manually rotating the apparatus in the manhole for several turns. It is. After that, the self-supporting device is driven in the existing pipe, and the strips are fed adjacent to the several turns of the tubular body, and the tubular bodies are sequentially formed by joining them together. It is like that.
Japanese Patent No. 3072015 JP 2003-42345 A

  By the way, when a belt-like member having joints formed on both side edges is spirally wound and adjacent joints are joined together to form a spiral tube, a new belt-like member to be fed is already wound. There is a possibility that a resisting force is generated between the strip-shaped member and the operation of the pipe making apparatus is hindered. Then, in the pipe making apparatus, a force that hinders the rotation of the inner roller and the outer roller works, and there is a problem that a new belt-shaped member to be fed is loosened. If the belt-like member is loose, it will be wound with a larger diameter than the tubular body that has already been wound, and there is a risk that the tubular body will gradually become thicker as the pipe making operation proceeds. there were.

  In the present invention, in order to cope with these various conventional problems, when a long belt-like member is spirally wound to produce a tubular body for rehabilitating an existing pipe, an arbitrary pipe is included in the existing pipe. An object of the present invention is to make it possible to produce a tubular body having a diameter and to easily carry in and out of the existing pipe. Further, in the process of forming the tubular body by spirally winding the band-shaped member, the tube-shaped member is formed by making the tube diameter while keeping the tube diameter of the tubular body to be constant so that the band-shaped member is not loosened. It is intended to provide a pipe manufacturing apparatus capable of preventing the tubular body from being rolled up and a method of manufacturing a tubular body using the pipe manufacturing apparatus.

  In order to achieve the above-described object, a pipe manufacturing apparatus according to the present invention continuously supplies a long band-shaped member having joints formed on both side edges in the width direction into an existing pipe, and spirals the band-shaped member. And forming the tubular body by joining the joining portions of the adjacent belt-shaped members to each other by winding, and further supplying the strip-shaped member to the tubular body to further form the tubular body. A pipe making apparatus, which is provided on an inner periphery of an existing pipe, includes a guide roller that is rotatably supported, a supply unit that forcibly feeds a belt-shaped member from the inside of the molding frame, A band-shaped member that has passed through the supply unit is sandwiched from the inside and the outside of the molding frame, and a bonding unit is provided for bonding to a bonded portion of the band-shaped member that has already been wound. Further, the band-shaped member between the supply unit and the bonding unit is provided. Feed The belt-shaped member provided with winding throttle means fed while causing tension in the tube diameter of the tubular body formed is characterized in that it is configured to be maintained at a constant dimension between.

  With such a configuration, tension is generated in the belt-shaped member in the feeding section between the supply unit that feeds the belt-shaped member and the joining unit that joins the belt-shaped members. A tubular body can be manufactured by spirally winding while acting so as to hug. For this reason, a winding drawing force acts on the tubular body during the pipe making process, and it is possible to suppress a dimension larger than a predetermined pipe diameter and to smoothly form a tubular body having a constant dimension. .

  In the present invention, a long belt-like member having joints formed on both side edges in the width direction is continuously supplied into an existing pipe, and the belt-like member is spirally wound and adjacent by winding. A pipe making apparatus for joining a band-shaped member to each other to form a tubular body, supplying a new strip-shaped member to the tubular body, and further forming a tubular body. The molding frame installed on the periphery includes a guide roller rotatably supported, a supply unit that forcibly feeds the belt-shaped member from the inside of the molding frame, and the belt-shaped member that passes through the supply unit is disposed inside the molding frame. And a joining unit to be joined to the joint portion of the already wound belt-like member, and in the feeding section of the belt-like member between the supply unit and the joining unit, the feeding unit has a belt-like shape. A pair of feed rollers that are driven to rotate so as to feed the material in the direction of the joining unit are provided, and the joining unit is provided with a joining roller that feeds the belt while sandwiching the belt-like member, and the rotation speed of the feed roller of the supply unit Is controlled to be slower than the rotational speed of the joining roller of the joining unit.

  More specifically, in the pipe manufacturing apparatus having the above-described configuration, the joining roller of the joining unit is disposed on the inner peripheral side of the spirally wound belt-like member and is rotated between the inner surface roller and the belt-like member. It is preferable that an outer surface roller disposed on the outer peripheral side is provided, and the inner surface roller is controlled to be faster than the feed roller of the supply unit.

  As a result, the feeding amount of the belt-like member from the supply unit side is different from the pull-in amount of the belt-like member on the joining unit side, and the feeding amount of the belt-like member on the joining unit side is set to be relatively large. . Therefore, a tensile force is generated in the belt-shaped member in the feeding section, and a winding drawing effect can be achieved.

  In the pipe manufacturing apparatus having the above-described configuration, the joining roller of the joining unit may be disposed on the inner peripheral side of a spirally wound belt-like member and rotationally driven. An outer surface roller disposed on the outer peripheral side, and the belt-like member is formed by fitting the joint portions of both side edges to each other when they are spirally wound. It is formed to be joined in two stages. The inner surface roller of the joining unit includes a first roller corresponding to the main joint portion of the belt-like member and a second roller corresponding to the sub-joint portion of the belt-like member, and the first roller and the second roller Due to the different outer diameter dimensions, the belt-like members fed adjacent to each other by being spirally wound by the supply unit are configured so that the feeding amount of the belt-like member in each of the first roller and the second roller is different. The main joining portion is joined first through the joining unit, and the inner roller rotates around the belt-like member while applying a winding drawing force, and then the sub-joining portions of the belt-like members are joined together. .

  According to the present invention, in the pipe manufacturing apparatus having the above-described configuration, the inner roller has the first roller and the second roller formed integrally, and the second roller has a larger diameter than the first roller. Is preferred.

  In this case, in the joining roller, the band-shaped member fed in contact with the second roller at the same time has a larger quantity than the band-shaped member fed in contact with the first roller of the inner surface roller. For this reason, in the band-shaped member in which the main joint portion is already bonded, a winding drawing force is generated at the time of joining the sub-joint portion, and it is possible to join the band-shaped members without loosening and to form a tubular body. Can be prevented.

  In addition, the present invention provides a tubular body by continuously supplying a long strip-shaped member into an existing pipe using the above-described pipe manufacturing apparatus, and winding the strip-shaped member in a spiral shape. This is a pipe-making method in which a band-shaped member is newly supplied and a tubular body is additionally formed, and tension is applied to the band-shaped member so that the band-shaped member can be hugged against a molding frame installed on the inner periphery of the existing pipe. While winding in a spiral, the strip-shaped member is fed into the joining unit, the joint portion of the strip-shaped members adjacent to each other is joined, and the tubular body is formed while winding and squeezing, so that the tube diameter of the tubular body to be formed is constant. It is characterized by maintaining the dimensions.

  By such an invention, it is possible to prevent a phenomenon such that the tube body is gradually wound and thickened by the tension generated in the belt-shaped member, and it is possible to suppress a dimension larger than a predetermined tube diameter. Thus, a tubular body having a constant dimension can be formed smoothly.

  According to the pipe manufacturing apparatus of the present invention configured as described above and the pipe manufacturing method of a tubular body manufactured using this pipe manufacturing apparatus, a long belt-like member is spirally wound to rehabilitate an existing pipe. When producing the tubular body for use, it is possible to maintain the tube diameter of the tubular body to be formed at a constant size by preventing the belt-like member from becoming loose. Thereby, it is possible to prevent the tubular body formed in the pipe making process from being rolled up, and it is possible to smoothly proceed with the rehabilitation work of the existing pipe to produce a highly accurate tubular body.

  Hereinafter, the best mode for carrying out a pipe making apparatus according to the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment of a pipe manufacturing apparatus and a pipe manufacturing method of a tubular body according to the present invention, and FIG. 1 shows an example of an existing pipe rehabilitation method using the pipe manufacturing apparatus of the present invention. 2 is a front view of the pipe making apparatus of the present invention, and FIG. 3 is a partially enlarged view of the pipe making apparatus of FIG. In the following description, for the sake of convenience of explanation, the traveling direction in the pipe line when the tubular body is manufactured by the pipe manufacturing apparatus 1 is defined as the forward direction, and the opposite direction is defined as the rear direction.

  The pipe manufacturing apparatus 1 of the present invention continuously supplies a long strip member 100 having joints formed on both side edges in the width direction sequentially into the existing pipe 200, and the strip member 100 is spirally wound. This is a device that is rotated to produce a tubular body 130. In addition, a new belt-like member 100 is continuously supplied to the formed tubular body 130 (band-like member 100), and the tubular body 130 is additionally formed in the existing pipe 200.

  Here, an embodiment of the belt-like member 100 used to form the tubular body 130 in the present invention will be described.

  FIG. 4 is a cross-sectional view showing an example of a band-shaped member forming a tubular body, FIG. 5 is an explanatory view showing a state in which adjacent band-shaped members are joined to each other in the band-shaped member of FIG. 4, and FIG. FIG. 6B is an explanatory view showing a state where the main joining portion of the band-shaped member is joined, and FIG. 6B is an explanatory view showing a joining completed state in which the sub-joining portion of the belt-like member is joined following FIG. .

  The band-shaped member 100 shown in FIG. 4 is formed using a synthetic resin material such as hard vinyl chloride, polyethylene, and polypropylene, for example, and has a long band shape with flexibility. On both side edge portions of the belt-like member 100, a joint convex portion 101 and a joint concave portion 102 that can be engaged with each other are formed along the longitudinal direction.

  The joint convex part 101 is provided with the support | pillar part 104 and the insertion part 105 of the cross-sectional substantially circular shape of a front-end | tip. Further, the bonding recess 102 is formed on the side edge portion on the opposite side of the bonding protrusion 101, and is formed on the insertion portion 106 having a substantially circular cross section, and on the outer side (upper portion in the drawing) of the insertion portion 106. The flange portion 107 is provided. In the vicinity of the bonding convex portion 101, a band-shaped soft elastic body such as an elastomer that prevents slippage and adheres to each other when the band-shaped members 100, 100 are bonded together may be provided in advance.

  Between the joint convex part 101 and the joint recessed part 102 of the strip | belt-shaped member 100, several rib 103 ... 103 is standingly arranged along the longitudinal direction. The tip portions of these ribs 103... 103 are formed in a substantially T-shaped cross section and have a configuration similar to the flange portion 107 of the joint recess 102.

  Further, the belt-like member 100 has an inclined piece 108 that is refracted and extended in an oblique direction on the outer edge side of the joint recess 102. The tip of the inclined piece 108 has a substantially T-shaped rib 103 formed on the side of the joint convex portion 101 when the joint concave portion 102 is fitted to the joint convex portion 101 of the adjacent band-shaped member 100. It is comprised so that it can latch to a front-end | tip part.

  The strip-shaped member 100 formed in such a structure is spirally wound by the pipe manufacturing apparatus 1 described later. In the winding process, as shown in FIG. 5, of the two strip members 100, 100 adjacent to each other, the joint convex portion 101 of the other strip member 100 is formed in the joint concave portion 102 of one strip member 100. It is fitted from the inner side (the inner side of the already wound belt-like member 100). Thereby, as shown to Fig.6 (a), the strip | belt-shaped members 100 and 100 which adjoin each other are mutually connected, and the main junction part 110 of the strip | belt-shaped members 100 and 100 is joined and formed. Moreover, the strip | belt-shaped members 100 and 100 shape a tubular body in the existing pipe | tube, when the main junction part 110 is joined. At this time, the inclined piece 108 of the belt-like member 100 is elastically deformed into a more refracted state and is only in contact with the side portion of the rib 103 of the adjacent belt-like member 100.

  Further, from this state, when the inclined piece 108 of the belt-like member 100 is pressed, it moves over the front side portion of the rib 103, rebounds elastically and returns to its original shape, and returns to the tip portion of the rib 103 of the adjacent belt-like member 100. It is inserted. As a result, as shown in FIG. 6B, the inclined piece 108 and the rib 103 of the belt-like member 100 are locked, and the sub-joining portions 120 of the belt-like members 100 and 100 adjacent to each other are joined and formed. 100 and 100 are joined to each other.

  Thus, when the belt-like member 100 forming the main joint portion 110 and the sub-joint portion 120 is formed into the tubular body 130, the main joint portion 110 is first joined to form a tubular shape, thereby forming a pipe diameter in the existing pipe. Then, the peripheral length can be determined, and subsequently, the sub-joining portion 120 is joined, so that the joining strength between the strip-like members 100, 100 in the formed tubular body 130 can be increased, and the water-stopping property can also be enhanced. ing.

  As shown in FIG. 1, the belt-like member 100 extruded to have such a cross-sectional shape is prepared at the enforcement site so that it is wound around a winding drum 91 and fed out from the winding drum 91.

  As shown in FIG. 2, the pipe making apparatus 1 installed in the existing pipe 200 that performs rehabilitation includes a forming frame 2. The molding frame 2 includes a plurality of link bodies 20 and a refractive link 30 and is connected to each other. Further, in the molded frame 2, the plurality of link bodies 20 and the refractive links 30 are connected to each other in a state where the refractive link 30 is bent inward of the existing pipe 200, and the joining unit 40 and the supply unit 60 are connected. And is formed in a substantially annular shape.

  More specifically, the molding frame 2 includes a link member 22 on one end side of a plurality of link bodies 20 connected in a row and a connecting member of the refractive link 30 with the refractive link 30 bent inward. 24 is connected, and the other connecting member 25 of the refractive link 30 and the link member 21 on the other end side of the link body 20 are connected. And the joining unit 40 and the supply unit 60 are provided in the some link body 20 connected with 1 row.

  7A and 7B show a link body of the forming frame 2 in the pipe making apparatus 1, FIG. 7A is a front view, and FIG. 7B is a plan view thereof. Each link body 20 of the molding frame 2 is connected to a pair of link members 21 and 22 via a connecting shaft 23 so as to be rotatable.

  As shown in the figure, the link members 21 and 22 constituting each link body 20 include front side plates 21a and 22a, rear side plates 21b and 22b, and opposite ends of the front side plates 21a and 22a and the rear side plates 21b and 22b. It is formed in a U shape from connecting plates 21c and 22c installed between the sections. The link body 20 overlaps the other end portions of the link member 22 facing the front side plate 21a and the rear side plate 21b with the other end portions of the link member 22 facing the front side plate 22a and the rear side plate 22b. And are formed so as to be pivotably connected to each other.

  Adjacent link bodies 20 and 20 are detachably connected to each other by bolts and nuts (not shown) with the connecting plates 21c and 22c of the link members 21 and 22 abutting each other. As will be described later, if the specific adjacent link bodies 20 and 20 can be attached and detached so that the molding frame 2 can be formed in a straight line, the remaining connecting plates 21c and 22c are welded or the like. You may fix so that attachment or detachment is impossible.

  A rotation restricting piece 28 is provided at each of the other end of the front plate 22a and the other end of the rear plate 22b of the link member 22. Further, a notch 27 corresponding to the rotation restricting piece 28 is formed at the other end of the front plate 21 a and the other end of the rear plate 21 b of the link member 21. The notch 27 is formed over a certain range on a set radius centered on the rotation center of the connecting shaft 23, and the rotation restricting piece 27 with which the rotation range of the link member 22 relative to the link member 21 abuts the notch 27. Is regulated by. Thereby, it is comprised so that the link body 20 may control the middle bending | flexion bent inward.

  Further, the refractive link 30 is connected to the link body 20 via the connecting members 24 and 25 at both ends of the link members 31 and 32 so that the link members 31 and 32 are connected in a bent state. At the other end of each of the link members 31 and 32 of the refraction link 30, a rotation restricting piece 33 similar to that of the link body 20 is provided. Further, a notch 27 corresponding to the rotation restricting piece 33 is formed in a certain range at the ends of the connecting members 24 and 25, and the rotation range of the link members 31 and 32 of the refractive link 30 is restricted. Yes.

  A handle 34 for adjusting the bent shape is disposed on the refraction link 30 that is connected in a bent state in the molding frame 2. The handle 34 is provided with a rotation shaft 35 threaded on the outer surface thereof, and a link arm that is rotatably connected to the link members 31 and 32 is disposed at the tip thereof. Thereby, by rotating the handle 34, the rotation shaft 35 is operated in the axial direction, and the refraction angle of the refraction link 30 can be adjusted.

  The refraction link 30 is not limited to this as long as the bent shape can be opened and closed. The refraction link 30 can be opened and closed by a mechanical action as described above, and can be expanded and contracted by a hydraulic cylinder or air pressure. An air cylinder or the like to be operated may be used.

  The guide roller 50 is rotatable on each connecting shaft 23 of the molding frame 2, that is, each link body 20, the refractive link 30 and the connecting members 24 and 25, and each connecting shaft 23 of the joining unit 40 and the connecting member 24. It is pivotally supported. As the guide roller 50, a guide roller with a hook including a roller main body 51 and a flange 52 having a diameter larger than that of the roller main body 51 is used.

  The guide roller 50 is made of a synthetic resin material or a metal material, and is provided so as to be rotatably supported around the connecting shaft 23 via a bearing 53 as shown in FIGS. 7 (a) and 7 (b). It has been. Further, the outer peripheral surface of the roller body 51 of the guide roller 50 is in contact with the inner surface of the belt-like member 100. As such a guide roller 50, either a cylindrical smooth guide roller or a guide roller with a hook having a hook 52 for guiding one side edge of the belt-like member 100 can be used. In this embodiment, a guide roller with a hook is used.

  In addition, the guide roller 50 is a belt-like member 100 constituting the tubular body 130 in order to advance the pipe making apparatus 1 while making the tubular body 130 while spirally winding the belt-like member 100 in the existing pipe 200. It is arranged to be at right angles to. The method of making the guide roller 50 perpendicular to the belt-shaped member 100 constituting the tubular body 130 is not particularly limited. For example, in the molded frame 2, the connecting portions of the adjacent link bodies 20, 20 are adjacent to each other. Of the connecting portion between the link body 20 and the connecting member 24 and the connecting portion between a pair of adjacent connecting members 24, 24, at least one connecting portion is connected to one link body 20 or the connecting member 24. For example, a method may be used in which the link body 20 or the connecting member 24 is moved in the tube axis direction and fixed in the moved state.

  A joining unit 40 and a supply unit 60 are disposed below the molding frame 2 in FIG. As shown in FIG. 3, the joining unit 40 includes a joining roller 45 in which a hydraulic hose 42 for supplying pressure oil to a hydraulic motor inside the box body 41 is connected, and an inner roller 43 and an outer roller 44 are combined, A gear mechanism 46 that periodically rotates the joining roller 45 is provided. The box body 41 is formed in a rigid box shape, and a gear mechanism 46 is provided therein.

  The gear mechanism 46 is provided with gears 46a and 46b on a rotating shaft that is rotatably supported by the box 41 and extends in the front-rear direction, and is connected to the output shaft of the hydraulic motor. As a result, the driving force of the hydraulic motor is transmitted to the gears 46a and 46b meshing with each other so as to rotate.

  The hydraulic hose 42 is supplied with pressure oil from the hydraulic unit 93 shown in FIG. The hydraulic unit 93 is driven by electric power supplied from the generator 92. In this case, the hydraulic hose 42 extending from the hydraulic unit 93 is connected to the hydraulic motor via a rotary joint, and can supply pressure oil without affecting the rotation of the pipe making apparatus 1.

  The joining roller 45 includes an inner surface roller 43 that is rotatably supported in the box body 41, and an outer surface roller 44 disposed outside the box body 41. A rotation direction is set to the inner surface roller 43 so that the belt-shaped member 100 is sandwiched between the inner surface roller 43 and the outer surface roller 44 by a driving force from the gear mechanism 46. Thereby, the inner surface roller 42 and the outer surface roller 43 that rotate in opposite directions via the hydraulic motor and the gear mechanism 44 sandwich the newly supplied belt-shaped member 100 and are already wound in a spiral shape. It can be sent out toward 100 (the edge of the tubular body 130).

  Out of such joining rollers 45, the outer surface roller 44 is configured to rotate in contact with the outer surface of the band-shaped member 100 on the side that becomes the outer peripheral surface of the tubular body 130 to be formed. As shown in FIG. 8, the outer surface roller 44 has a plurality of annular flanges 442, 443, 444 formed on the cylindrical main body 441 at intervals. These annular flange portions 442 are configured to fit between the ribs 103 of the belt-like member 100. The outer surface roller 44 does not have a driving force like the guide roller 50 of the other link body 20, and the inner surface roller 43, the outer peripheral surface 445 of the cylindrical main body 441, and the like are substantially the ribs 103 of the belt-shaped member 100. A T-shaped tip is pressed against and knurled to prevent the strip member 100 from slipping.

  In the outer roller 44, the annular flange 442 does not need to contact the belt-like member 100 particularly, and it is important to fit in the groove between the ribs 103 and 103. The outer peripheral surface of the outer surface roller 44 is rotated by contact with the belt-shaped member 100, and is rotatably provided without using a separate driving force, so that the belt-shaped member 100 can be fed out.

  On the other hand, the inner surface roller 43 has a cylindrical shape and is supported by the connecting shaft 433. The inner roller 42 is formed in a cylindrical shape so as to rotate while being in contact with the belt member 100, and supports the belt members 100 ... 100 pressed from the outside by the outer roller 44 from the inside. Yes. The outer peripheral surface of the inner surface roller 43 includes a first roller portion 431 that joins the main joint portion 110 of the belt-like member 100 and a second roller portion 432 that joins the sub-joint portion 120 of the belt-like member 100.

  In the inner surface roller 43, the first roller portion 431 and the second roller portion 432 are formed to have different outer diameter dimensions. In the illustrated embodiment, the second roller portion 432 is formed with a larger diameter than the first roller portion 431. In the inner surface roller 43, both the outer peripheral surfaces of the first roller portion 431 and the second roller portion 432 are formed of a synthetic resin material or a synthetic rubber material having elasticity such as hard urethane rubber or silicon resin.

  In the first roller portion 431, the main joining portion 110 of the fed belt-like member 100 is joined with the outer surface roller 44. That is, as shown in FIG. 8, the joint convex part 101 of the new strip | belt-shaped member 100 is engage | inserted by the joint concave part 102 of the strip | belt-shaped member 100 which already passed through 1 round (refer Fig.6 (a)). At this time, the annular flanges 443 and 443 of the outer roller 44 positioned on the opposite side of the first roller portion 431 of the inner roller 43 are adjacent to the first roller portion 431 and the main joints of the strip members 100 and 100 adjacent to each other. 110 is sandwiched and pressed so as to be in close contact with the first roller portion 431, and the joining concave portion 102 and the joint convex portion 101 are joined and sent out. One of these annular flanges 443 and 443 is formed in a dimension that fits into a groove between the rib 103 of the belt-like member 100 and the joint recess 102 and can press the belt-like member 100, and the other is the belt-like member 100. It is located between the joint recess 102 and the inclined piece 108 and is formed with a small diameter that does not press the inclined piece 108.

  Further, in the second roller portion 432 of the inner surface roller 43, the sub-joint portion 120 between the belt-like members 100, 100 joined to the outer surface roller 44 is joined. That is, the inclined piece 108 of the band-shaped member 100 that has already undergone two rounds of rotation has a substantially T-shape of the rib 103 of the band-shaped member 100 adjacent to which only the main joint 110 is bonded through one round of rotation. And are joined to each other. Here, the annular flange portion 444 of the outer surface roller 44 is formed with a small diameter dimension capable of pressing the inclined piece 108 while allowing the adjacent band-like members 100 and 100 to overlap each other. Accordingly, the inclined piece 108 of one belt-like member 100 acts to be pushed into the rib 103 of the adjacent belt-like member 100.

  That is, the annular flange 444 of the outer surface roller 44 is fed between the adjacent annular flange 442 and the second roller portion 432 of the inner surface roller 43 while sandwiching and pressing the belt-like members 100, 100, The inclined piece 108 of the belt-like member 100 is fitted into the front end portion of the rib 103 of the adjacent belt-like member 100. Thereby, the sub-joint part 120 of the strip | belt-shaped members 100 and 100 which have already joined the main junction part 110 is joined, and the tubular body 130 is formed.

  Here, the inner surface roller 43 that acts to support the belt-like members 100... 100 pressed from the outside by the outer surface roller 44 from the inside is a synthetic resin material whose outer peripheral surface has elasticity as described above. Therefore, when the adjacent belt-like members 100, 100 are joined, the belt-like member 100 is pressure-bonded to the outer peripheral surface by the pressing force of the outer roller 44. Therefore, a difference in outer diameter between the first roller portion 431 and the second roller portion 432 in the inner surface roller 43 is allowed by elastic deformation of the outer peripheral surface. Further, since the second roller portion 432 is formed with a larger diameter than the first roller portion 431, the belt-like member 100 is more firmly pressed and joined.

  As a result, the band-shaped members 100, 100 to which the main joint portion 110 has been joined first, due to the difference in outer diameter between the first roller portion 431 and the second roller portion 432 when the sub-joint portion 120 is joined after going around. Winding force is generated. Therefore, the joining portion between the strip members 100 and 100 generates a tension in the spiral direction of the strip member 100 at the main joining portion 110, and the sub joining portion 120 is joined without looseness. As a result, the joint part of the tubular body 130 is tightly adhered, and becomes a tubular body having high strength and high water blocking properties.

  As shown in FIG. 3, a guide roller 47 is pivotally supported on the box body 41 at the rear in the feeding direction of the band-shaped member 100 by the joining roller 45. The guide roller 47 functions to sequentially guide the belt-like member 100 from the supply unit 60 to the joining roller 45.

  As described above, the connecting member 24 connected to the connecting end portion 48 of the joining unit 40 is the same as the link member 21 constituting the link body 20, and the other end portions of the front side plate 21a and the rear side plate 21b are connected to each other. , And are connected through a connecting shaft 23 so as to be freely rotatable. Further, a rotation restricting piece 28 is provided at the connecting end portion 48, and the other end portions of the front side plate 21 a and the rear side plate 21 b of the connecting member 24 are notched portions 27 corresponding to the rotation restricting piece 28 described above. Is formed over a certain range on a set radius with the rotation center of the connecting shaft 23 as the center. Thereby, the rotation range of the connecting member 24 with respect to the joining unit 40 is restricted by the turning restricting piece 27 that abuts the notch 27, and the connecting member 24 is restricted from bending inward.

  FIG. 9 is an explanatory diagram showing the internal structure of the supply unit 60. The supply unit 60 provided in front of the joining unit 40 is configured to forcibly feed the belt-like member 100 drawn from the rotary drum 91 from the inside of the molding frame 2. In this supply unit 60, a pair of feed rollers 63, 64, that is, an inner surface roller 63 provided on the rotary shaft 62 a, is rotated by a gear mechanism 65 provided in the box body 61 and having a plurality of meshing gears. The rotation direction is set so that the outer surface roller 64 provided on the shaft 62b feeds the band-shaped member 100 between them.

  Of the pair of feed rollers 63, 64, the inner surface roller 63 has a width substantially equivalent to the width of the band-shaped member 100 and is formed in a cylindrical shape, and is formed on the flat surface of the band-shaped member 100 that is the inner surface side of the tubular body 130. The outer diameter is set to rotate in contact.

  Further, a plurality of outer rollers 64 are provided with a width that can be inserted between adjacent ribs 103, 103 of the belt-like member 100 so as to be disposed between the ribs 103, 103 of the belt-like member 100, The outer diameter is set so as to have an interval corresponding to the thickness of the belt-like member 100 between the outer peripheral surface and the inner roller 63. Therefore, the outer peripheral surface of the outer roller 64 rotates between the adjacent ribs 103 and 103 of the strip member 100 in contact with the outer surface of the strip member 100 on the side that becomes the outer peripheral surface of the tubular body 130. The outer peripheral surface of the outer roller 64 is knurled, and feeds the belt-shaped member 100 without sliding.

  With such a supply unit 60, the belt-like member 100 can be sandwiched and sequentially sent out toward the joining unit 40 by a pair of feed rollers 63 and 64 rotating in opposite directions via a hydraulic motor and a gear mechanism 65. It has become.

  In the pipe manufacturing apparatus 1 according to the illustrated embodiment, in the joining unit 40 and the supply unit 60, a pair of feed rollers is provided so as to apply tension to the belt-like member 100 in the feed section of the belt-like member 100 corresponding thereto. The rotational speeds of 63 and 64 and the inner surface roller 43 of the joining unit 40 are made different. That is, in this case, the pair of feed rollers 63 and 64 are rotated slower than the inner surface roller 43 of the joining unit 40 to generate a tensile force on the belt-like member 100 in the feed section. Therefore, the feeding speed of the belt-like member 100 by the pair of feed rollers 63 and 64 of the supply unit 60 is different from the drawing speed of the belt-like member 100 by the joining roller 45 (inner surface roller 43 and outer surface roller 44) of the joining unit 40. The pulling speed of the band-shaped member 100 in the joining unit 40 is set to be relatively high.

  Therefore, the difference in rotational speed between the pair of feed rollers 63 and 64 and the inner surface roller 43 is that the belt-like member 100 is not fed so as to be adjacent to the already-rolled belt-like member 100 but is drawn. Since it is joined, it becomes a winding squeezing means that can be held by the molding frame 2. Thereby, it is comprised so that the pipe diameter of the tubular body 130 to form can be maintained at a fixed dimension.

  In addition, the shaping | molding flame | frame 2 is not limited to the structure which consists of several link bodies 20 as mentioned above. For example, if the inner diameter of the tubular body 130 to be formed is determined in advance, the plurality of link bodies 20 are not adjustable and the guide rollers are coupled to a plurality of substantially arc-shaped frames. An integral frame may be used.

  Next, a method for producing the tubular body 130 using the strip-like member 100 and a method for rehabilitating the existing tube 200 will be described.

  As shown in FIG. 1, the existing pipe 200 is provided with manholes 201 and 202 for each predetermined span. In this example, the upstream manhole 201 and the downstream manhole 202 in the construction target area (rehabilitation area) are used. Then, the tubular body 130 is manufactured in the existing pipe 200. Construction of the tubular body 130 is performed from the upstream side to the downstream side of the existing pipe 200.

  For the pipe production of the tubular body 130, a medium-out type belt-shaped member drum 91 (with a turntable) around which the belt-shaped member 100 is wound, a pipe manufacturing apparatus 1, a hydraulic unit 93, a generator 92, and the like are used. Among these, the belt-like member drum 91 is installed on the ground part on the upstream manhole 201 side, and the generator 92 is installed on the ground part on the downstream manhole 202 side. Moreover, the pipe making apparatus 1 and the hydraulic unit 93 are carried through the upstream manhole 201 and installed at the upstream end in the existing pipe 200 to be rehabilitated. At that time, the pipe making apparatus 1 disconnects the adjacent link bodies 20, 20 of the molding frame 2, and the molding frame 2 is made up of one link body 20, a refraction link 30, a joining unit 40, and the like. Carry in a line.

  In the pipe making apparatus 1, the peripheral length (the number of link bodies 20) of the forming frame 2 is adjusted so that the pipe size of the tubular body 130 that performs pipe making matches the pipe diameter of the existing pipe 200. Moreover, the pipe manufacturing apparatus 1 is adjusted so that it may become the helical pitch corresponding to the internal diameter of the existing pipe 200, and the width | variety of the strip | belt-shaped member 100 to be used.

  Subsequently, the belt-shaped member 100 is pulled out from the belt-shaped member drum 91 arranged on the ground and pulled into the upstream manhole 201. And after passing the front-end | tip part of this strip | belt-shaped member 100 to a pair of feed rollers 63 and 64 of the supply unit 60, the front-end | tip part of the strip | belt-shaped member 100 is wound around the guide roller 47, and the guide roller 50 and the existing pipe | tube 200 inside Put between the circumference. In this state, the entire pipe making apparatus 1 is manually rotated to wind the belt-like member 100 several times (about 1 to 3 times), and the tubular body 130 for several turns is unwound for starting pipe making.

  Next, by adjusting the refraction angle of the refraction link 30, the diameter of the forming frame 2 is increased, and the tubular body 130 that has already been unwound for starting is pressed outward by the guide rollers 50 to apply tension. Hold in state.

  As described above, when the tubular body 130 for several turns is unwound for starting pipe making and the installation of the pipe making apparatus 1 is completed, the supply unit 60 and the joining unit 40 of the pipe making apparatus 1 are then driven. As a result, as shown in FIG. 2, the belt-like member 100 is forcibly sent out from the supply unit 60, guided to the joining unit 40 through the guide roller 47, and is already wound on the tubular body 130 of several turns. It is sent to be adjacent.

  At this time, a tensile force is generated between the belt-like member 100 sent out from the supply unit 60 and the inner surface roller 43 of the joining unit 40. The belt-like member 100 is sandwiched between the inner surface roller 43 and the outer surface roller 44 of the joining unit 40 while having internal stress in the feeding section. Moreover, the pipe manufacturing apparatus 1 circulates (revolves) in the direction opposite to the feeding direction along the inner peripheral surface of the already wound tubular body 130 by the reaction force when the strip-shaped member 100 is fed.

  In the joining unit 40, a new belt-like member 100 generating a tension is supplied from the supply unit 60, and it is fed loosely so as to be hugged to the molding frame 2, and is applied to the joining recess 102 of the tubular body 130 that has already been wound. Then, the joint projections 101 are joined together so as to be pressed from the inside (see FIG. 5).

  Furthermore, as shown in FIG. 8, when the belt-like member 100 fed into the joining unit 40 is wound around the inner peripheral surface of the existing pipe 200 and moved by driving the pipe making apparatus 1, Again, it is located in the joining unit 40, and by the action of the joining roller 45, a new belt-like member 100 is supplied to this belt-like member 100, and the main joint 110 is joined. At the same time, the sub-joining portion 120 is joined to the belt-like member 100 constituting the tubular body 130 at the other side edge of the belt-like member 100 that has turned the inner peripheral surface of the existing pipe 200 by about one turn. .

  At this time, the inner roller 43 has different outer diameters of the first roller 431 and the second roller 432, and the feeding speed of the belt-like member 100 is different. In other words, the second roller 432 rotates so as to send out the belt-like member 100 (tubular body 130) at a higher speed than the first roller 431.

  Further, between the first roller 431 and the outer roller 44, the belt-like members 100, 100 are in a state where the main joint 110 is joined but the sub-joint 120 is not joined. In this state, the tubular body 130 circulates about one round, and the belt-like member 100 (tubular body 130) moves between the second roller 432 and the outer roller 44. Then, since the feeding speed of the second roller 432 is faster than that of the first roller 431, it is possible to join the belt-like members 100, 100 without loosening while applying tension when joining the sub-joining portions 120.

  Through such a pipe making process, as shown in FIG. 10, the pipe making apparatus 1 can sequentially produce the tubular body 130 having an arbitrary pipe diameter into the existing pipe 200. In addition, this pipe making apparatus 1 has a winding and drawing means for the tubular body 130 to be produced, and can form the tubular body 130 having a prescribed pipe diameter while applying tension to the belt-like member 100 as described above. .

  Therefore, unlike the conventional pipe manufacturing apparatus, the tubular body 130 manufactured by spirally winding the belt-like member 100 has a disadvantage that the pipe diameter gradually increases and becomes thicker during the pipe manufacturing process. Therefore, it is possible to proceed with the pipe making operation while maintaining a constant pipe diameter.

  In addition, since the main joint 110 between the band-shaped members 100 and 100 is joined to form a tubular body 130 having an arbitrary tube diameter, and the sub-joint 120 is joined without loosening via the joining unit 40, The tubular body 130 having high strength and high water-stopping property can be formed.

  At this time, the already wound belt-like member 100 is a tubular body that can allow elastic deformation by joining the main joint 110. For this reason, even if the outer surface roller 44 of the joining unit 40 is sandwiched between the inner peripheral surface of the existing pipe 200 and the belt-like member 100, it is deformed within the elastic deformation region to join the sub-joining portion 120. be able to. After the sub-joining portion 120 is joined, the tubular body 130 can be produced with substantially no gap with respect to the inner peripheral surface of the existing pipe 200.

  Further, since the outer surface roller 44 is provided so as to be rotatable regardless of the driving force, the acting load can be kept very small, and even if it contacts the existing pipe 200, the driving of the pipe making apparatus 1 is affected. Pipe production can be carried out very smoothly without generating frictional force. Furthermore, with this pipe manufacturing apparatus 1, it is possible to perform the filling operation of the backfilling material between the tubular body 130 and the existing pipe 200 simultaneously with the pipe manufacturing of the tubular body 130. In this case, the outer surface roller 44 of the joining unit 40 exists between the existing tube 200 and the tubular body 130 (the belt-like member 100). Even if the material adheres, there is no hindrance to the joining action of the belt-like member 100, and there is no possibility that the driving of the pipe making apparatus 1 is stopped.

  Furthermore, since the pipe making apparatus 1 has a substantially annular structure, the pipe making apparatus 1 does not block the existing pipe 200 during pipe making, and is stable in the existing pipe 200 even in a water-flowing state. In particular, the tubular body 130 can be manufactured.

  When the pipe production of the tubular body 130 is completed over the entire length of the construction target area (rehabilitation area) of the existing pipe 200, the strip-shaped member 100 at the pipe end of the tubular body 130 is cut, and then the pipe production apparatus 1 is disassembled, Equipment such as the pipe making apparatus 1 and the hydraulic unit 93 is removed.

  In addition, the strip | belt-shaped member 100 is not limited to the said form, For example, a form as shown in FIG. 11 may be sufficient. This belt-like member 100 is formed by molding a synthetic resin (for example, hard vinyl chloride, polyethylene, polypropylene, etc.) in a long shape, and a plurality of ribs 113.. 113 are formed along the longitudinal direction. Side edges are connected to each other using a strip-shaped connector 140.

  That is, the joint recessed part 112 is formed in the both-sides edge part of the strip | belt-shaped member 100 along a longitudinal direction, respectively. In addition, the connector 140 is formed with two joint convex portions 141 that can be joined to the joint concave portion 112 of the band-shaped member 100 in parallel with each other along the longitudinal direction.

  The belt-like member 100 having such a structure is spirally wound by the pipe making device 1 in a state where one of the joint convex portions 141 of the connector 140 is fitted into one of the joint concave portions 112 and 112 at both side edges. Turned to form the tubular body 130. In the winding process, as shown in FIGS. 11 (a) and 11 (b), the other belt-like member is formed in the joint recess 112 of one belt-like member 100 out of the two belt-like members 100, 100 adjacent to each other. By fitting the joint convex portion 141 of the connector 140 fitted into the joint concave portion 112 from the inside (the inside of the already wound belt-like member 100), the belt-like members 100, 100 adjacent to each other are mutually connected. It can be joined.

  In the present invention, in the above embodiment, a hydraulic motor is used as a drive source for the joining unit 40 and the supply unit 60. However, an electric motor, a hydraulic motor, or the like may be used, and there is no particular limitation.

It is explanatory drawing which shows an example of the rehabilitation process of the existing pipe | tube using the pipe manufacturing apparatus which concerns on this invention. It is a front view of the pipe manufacturing apparatus concerning the present invention. It is the elements on larger scale of the pipe making apparatus of FIG. It is sectional drawing which shows an example of the strip | belt-shaped member which forms the tubular body in this invention. It is explanatory drawing which shows a mode that the adjacent strip | belt-shaped member in the strip | belt-shaped member of FIG. 4 is mutually joined. FIG. 6A is an explanatory view showing a state where the main joint portion of the belt-like member is joined, and FIG. 6B shows a joining completed state in which the sub-joint portion of the belt-like member is joined following FIG. 6A. It is explanatory drawing. FIG. 7A is a front view of a link body of the forming frame 2 in the pipe making apparatus 1, and FIG. 7B is a plan view thereof. It is explanatory drawing which shows the joining roller in a joining unit. It is explanatory drawing which shows the internal structure of a supply unit. It is explanatory drawing which shows the rehabilitation process of the existing pipe | tube using the pipe manufacturing apparatus which concerns on this invention. Fig.11 (a) is sectional drawing which shows the other example of the strip | belt-shaped member which forms the tubular body in this invention, FIG.11 (b) is a fragmentary perspective view of a junction part. It is a front view which shows an example of the conventional pipe manufacturing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe making apparatus 2 Forming frame 20 Link body 21, 22 Link member 23 Connection shaft 24, 25 Connection member 30 Refraction link 40 Joining unit 43 Inner surface roller 44 Outer surface roller 50 Guide roller 60 Supply unit 91 Drum 92 Generator 93 Hydraulic unit 100 Band-shaped member 101 Joint convex portion 102 Joint concave portion 103 Rib 110 Main joint portion 120 Sub joint portion 130 Tubular body 200 Existing pipe

Claims (6)

A long strip-shaped member having joints formed on both side edges in the width direction is continuously supplied into the existing pipe, the strip-shaped member is spirally wound, and the joint portions of adjacent strip-shaped members are wound together. Are joined to each other to form a tubular body, and a strip-shaped member is newly supplied to the tubular body to further form a tubular body,
The forming frame installed on the inner periphery of the existing pipe includes a guide roller rotatably supported, a supply unit that forcibly feeds the belt-shaped member from the inside of the molding frame, and a belt-shaped member that has passed through the supply unit. There is provided a joining unit that is sandwiched from the inside and outside of the molding frame and joined to the joint portion of the already wound belt-like member, and is further attached to the belt-like member in the feeding section of the belt-like member between the supply unit and the joining unit. A pipe making apparatus comprising a winding and drawing means for feeding while generating a tension, and configured to maintain a pipe diameter of a formed tubular body at a constant dimension. A long strip-shaped member having joints formed on both side edges in the width direction is continuously supplied into the existing pipe, the strip-shaped member is spirally wound, and the joint portions of adjacent strip-shaped members are wound together. Are joined to each other to form a tubular body, and a strip-shaped member is newly supplied to the tubular body to further form a tubular body,
The forming frame installed on the inner periphery of the existing pipe includes a guide roller rotatably supported, a supply unit that forcibly feeds the belt-shaped member from the inside of the molding frame, and a belt-shaped member that has passed through the supply unit. A joining unit that is sandwiched from the inside and outside of the molding frame and joined to the joint portion of the already wound belt-like member is provided, and in the feeding section of the belt-like member between the supply unit and the joining unit, Is provided with a pair of feed rollers that are driven to rotate so as to feed the strip-shaped member in the direction of the joining unit, and the joining unit is provided with a joining roller that feeds the belt-shaped member while sandwiching it. The rotational speed is controlled to be slower than the rotational speed of the joining roller of the joining unit. Pipe producing apparatus. The pipe making apparatus according to claim 2,
The joining roller of the joining unit includes an inner surface roller that is disposed on the inner peripheral side of the belt-like member wound in a spiral manner and rotationally driven, and an outer surface roller that is disposed on the outer peripheral side of the belt-like member. The pipe making apparatus is controlled so that the rotation speed of the inner surface roller is higher than the feed roller of the supply unit. The pipe making apparatus according to claim 2,
The joining roller of the joining unit includes an inner surface roller that is disposed on the inner peripheral side of the belt-like member wound in a spiral manner and rotationally driven, and an outer surface roller that is disposed on the outer peripheral side of the belt-like member. ,
The band-shaped member is formed so that the joint portions on both side edges are joined in two stages of a main joint portion and a sub-joint portion which are formed by fitting each other when spirally wound.
The inner surface roller of the joining unit includes a first roller corresponding to the main joining portion of the belt-like member and a second roller corresponding to the sub-joining portion of the belt-like member, and the outer diameters of these first roller and second roller. Due to the different dimensions, the feeding amount of the belt-like member in each of the first roller and the second roller is made different,
Adjacent belt-like members wound spirally by the supply unit are joined together with the main joint portion first through the joining unit, and the belt-like member is turned around while the drawing force is applied to the belt-like member by the inner surface roller. Then, the sub-joint part of the strip-shaped members is joined, and the pipe making apparatus characterized by the above-mentioned. The pipe making apparatus according to claim 4, wherein
The inner surface roller has a first roller and a second roller formed integrally, and the second roller has a larger diameter than the first roller. Using the pipe making apparatus according to any one of claims 1 to 5, a long strip member is continuously supplied into an existing pipe, and the strip member is spirally wound to form a tubular body. Forming a tubular body by additionally forming a tubular body by supplying a new band-like member to the front of the tubular body,
Adjacent belt-like members are wound by spirally winding the belt-like member while applying tension to the molding frame installed on the inner circumference of the existing pipe, and feeding the belt-like member into the joining unit. A tubular body-manufacturing method characterized by maintaining the tube diameter of the tubular body to be formed at a constant size by joining the joints of the above and producing a tubular body while winding and drawing.

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