JP5814848B2 - Pipe making equipment - Google Patents

Description

  The present invention relates to a pipe making apparatus for rehabilitating existing pipes such as agricultural water pipes, sewer pipes, water pipes, or gas pipes.

  A method of rehabilitating the inner peripheral surface of a aging existing pipe using a belt-shaped lining material is widely used. In this type of method, a long belt-like member having a joint is used, and this belt-like member is spirally wound in an existing pipe to form a rehabilitation pipe. For example, Patent Document 1 discloses a pipe manufacturing apparatus that is installed in an existing pipe and continuously spirally rolls a belt-shaped member that is continuously supplied to join a joint portion of the belt-shaped member.

  This pipe making apparatus includes an annular mounting frame, a plurality of guide rollers arranged at a predetermined pitch on the outer periphery of the mounting frame, and a joining mechanism portion that joins joining portions at both side edges of the belt-like member. The joining mechanism portion includes an outer roller and an inner roller, and has a configuration in which a belt-like member wound in a spiral shape is joined in a tubular shape.

Japanese Patent No. 3072015

  During the rehabilitation work of existing pipes, the fluid in the pipes must be blocked or diverted, and the surrounding buildings and ground traffic will be affected. And it is required to work safely.

  In addition, existing pipes to be repaired have deposits on the inner surface, cracks, irregularities, etc. due to long-term use. However, in the conventional pipe making apparatus, the outer roller comes into contact with the deposits and irregularities in the existing pipe, and an excessive load is applied to the inner roller rotating in synchronization with this, and the outer roller does not rotate smoothly. Furthermore, the rotating shaft and bearing of the inner roller may be damaged.

  In such a case, the pipe making operation is interrupted, and the inner roller and the outer roller must be repaired or replaced so that the inner roller and the outer roller rotate smoothly. . In addition, the conventional pipe making apparatus has a complicated mounting structure in which the inner roller or the like cannot be easily removed. In addition, the inner roller is in contact with the belt-like member and the regenerated pipe in the pipe making. Therefore, it is difficult to remove the inner roller receiving the pressing force, and it is very difficult to repair or replace such an inner roller in a narrow space inside the existing pipe. It was such a thing.

  The present invention has been made in view of such conventional problems, and the object of the present invention is as a structure that can easily repair or replace the inner roller and the outer roller in a short time. An object of the present invention is to provide a pipe making apparatus capable of efficiently forming a rehabilitated pipe with high accuracy without incurring a prolonged construction period.

  The present invention relates to a pipe making apparatus in which a long band-shaped member is wound and joined in a spiral shape to form a tubular shape, an annular frame that circulates along the inner surface of an existing pipe, and a preceding portion of the band-shaped member An inner roller and an outer roller sandwiching a subsequent portion, and the inner roller is provided in an inner roller unit that rotatably supports a rotating shaft thereof, and a bracket that holds the inner roller unit on the annular frame It is set as the structure provided. The bracket has guides on inner surfaces facing each other, the inner roller unit includes a sliding portion that slides along the guide on the outer surface, and the inner roller unit is inserted into and removed from the bracket. It is characterized by being stored as possible.

  As a result, if a problem occurs with the inner roller during the pipe making operation, the pipe making device is stopped, and the inner roller unit that supports the inner roller is removed from the bracket of the annular frame and removed from the pipe making device. Can do. Therefore, even in a narrow space in the existing pipe, the inner roller can be easily repaired or replaced, and the work can be completed in a short time. When the repair work is completed, the inner roller unit can be inserted into the bracket and stored, and can be easily attached to the annular frame. Alternatively, the inner roller unit itself can be exchanged, and the pipe making operation can be resumed without taking time. Therefore, it is possible to efficiently form a highly accurate rehabilitation pipe without incurring a prolonged construction period.

  The following is mentioned as a more concrete structure of the said pipe making apparatus. That is, it is preferable that the sliding portion includes a convex line disposed along the axial direction of the inner roller, and the guide includes a concave groove that slides the convex line inward.

  The sliding portion may include a concave groove disposed along the axial direction of the inner roller, and the guide may include a ridge that slides the concave groove outward.

  With such a configuration, the ridge and the groove can be slid and fitted to each other, and the inner roller unit can be accommodated in the bracket so that it can be inserted and removed. Therefore, the inner roller unit can be removed and attached even in the existing pipe by a simple operation.

  In the pipe manufacturing apparatus having the above-described configuration, the inner roller unit has a gap in the fitting between the sliding portion and the guide of the bracket, and the bracket has fixing means for fixing the inner roller unit in a stored state. It is preferable to provide.

  Thereby, when the sliding part of the inner roller unit is slid and inserted into the guide of the bracket, the inner roller unit is allowed to tilt in the axial direction within the bracket. Therefore, even in a narrow space, the inner roller unit can be easily inserted and removed from the bracket. Further, when the inner roller unit is stored, the inner roller unit is securely fixed to the bracket by the fixing means, and when the fixing means is released, the inner roller unit and the bracket are loosely fixed. Can be pulled out. At this time, even when the contact pressure from the belt-like member or the rehabilitation pipe is applied to the inner roller, the fixing between the inner roller unit and the bracket is loosened, so that the gap between the inner roller, the belt-like member, and the rehabilitation pipe is reduced. A gap can be formed, and the inner roller unit can be easily pulled out by releasing from the contact pressure.

Further, in the pipe manufacturing apparatus having the above-described configuration, the sliding portion has a downwardly inclined surface in a forward direction in which the inner roller unit is pulled out from the bracket and has an inclined surface facing the inner peripheral side of the annular frame upward. and Turkey is preferred.

Thus, when loosening the fixing of the inner roller unit and the bracket to release the fixing means, by engaging the guide slope surface and the bracket of the sliding portion of the inner roller unit, the inner roller unit toward the body It can be easily pulled out.

  Further, in the pipe making apparatus having the above-described configuration, the outer roller is provided in an outer roller unit that rotatably supports the rotation shaft, and the outer roller unit is detachably coupled to the inner roller unit. There may be.

  As a result, when the inner roller is repaired or replaced, the outer roller unit and the inner roller can be separated by removing the outer roller unit from the inner roller unit, and each repair or replacement operation becomes easier. .

  In the present invention, when it is necessary to repair and replace the inner roller or the like for joining the belt-like member, the inner roller can be easily removed from the annular frame, and the work can be easily performed in a short time. It is possible to efficiently and accurately carry out pipe making work without incurring a long period of time.

FIG. 1 is an explanatory view showing an underground pipe line that is rehabilitated by using the pipe making apparatus according to the present invention. FIG. 2 is a front view showing the pipe making apparatus according to the embodiment of the present invention. 3A and 3B show a link body of an annular frame in the pipe making apparatus, FIG. 3A is a front view, and FIG. FIG. 4 is a side view showing a partially broken inner roller and outer roller of the pipe making apparatus. FIG. 5 is a perspective view showing a bracket and an inner roller unit pulled out from the bracket in the pipe making apparatus. FIG. 6 is a perspective view of the bracket and the inner roller unit of FIG. 5 as viewed from the opposite side. FIG. 7 is a perspective view showing another embodiment of the bracket and the inner roller unit. FIG. 8 is a side view showing the storage state of the inner roller unit in the bracket and inner roller unit shown in FIG. FIG. 9 is a side view showing how the inner roller unit is pulled out from the state shown in FIG. FIG. 10 is a side view showing a state where the inner roller unit is further pulled out from the state shown in FIG. 9. 11 (a) and 11 (b) show an example of a belt-like member, FIG. 11 (a) is an explanatory view showing a state of joining the belt-like member, and FIG. 11 (b) is an explanatory view showing a joined state. is there. 12 (a) and 12 (b) show other examples of the belt-like member, FIG. 12 (a) is an explanatory view showing the joined state, and FIG. 12 (b) is an enlarged view of the joint portion of the belt-like member. FIG.

  Hereinafter, an embodiment of a pipe making apparatus according to the present invention will be described with reference to the drawings.

  A pipe making apparatus 1 shown in FIGS. 1 and 2 is an apparatus that continuously draws the belt-like member 100 into an existing pipe 200 and spirally winds it to make a pipe. By the pipe making apparatus 1, the belt-like member 100 is arranged so that the leading portion and the trailing portion are adjacent to each other, and are sandwiched between the outer roller 51 and the inner roller 61 and joined to each other. Thereby, the strip-shaped member 100 forms the rehabilitation pipe 10. Moreover, the pipe making apparatus 1 additionally forms the renovated pipe 10 while proceeding in the axial direction of the existing pipe 200 while rotating in the circumferential direction along the inner surface of the existing pipe 200.

  The pipe making apparatus 1 according to the illustrated embodiment includes an annular frame 2 that circulates along the inner surface of the existing pipe 200 and a joining mechanism portion 4 that is attached to the annular frame 2 and joins the belt-like member 100.

  As shown in FIG. 2, the annular frame 2 is formed in an annular shape by connecting a plurality of link bodies 21. As shown in FIGS. 3A and 3B, each link body 21 is formed by a pair of link frames 22 and 23 that are rotatably connected via a connecting shaft 24. As shown in FIG. 3B, the first link frame 22 includes a pair of opposed first link plates 221 and a first connection plate 222 that couples the first link plates 221 to face each other. Composed. The second link frame 23 includes a pair of opposing second link plates 231 and a second connection plate 232 that couples the second link plates 231 to face each other.

  In the link body 21, the end portions of the pair of second link plates 231 in the second link frame 23 are overlapped with the end portions of the pair of first link plates 221 in the first link frame 22, respectively. It is formed so as to be freely pivotable through the. The link body 21 is fixed to the first connection plate 222 of one link body 21 by abutting the first connection plate 222 of the other link body 21. In addition, the second connection plate 232 in the other link body 21 is abutted and coupled to the second connection plate 232 in one link body 21.

  As shown in FIG. 3A, a rotation restricting piece 26 is provided at the end of the first link frame 22 on the connecting shaft 24 side. The second link frame 23 is provided with a notch 27 corresponding to the rotation restricting piece 26. The notch 27 is formed over a certain range on a set radius with the rotation center of the connecting shaft 24 as the center. Thereby, the mutual rotation operation of the pair of link frames 22 and 23 is restricted to an angle range until the rotation restricting piece 26 and the notch 27 abut, and the link body 21 is inward or outward. Prevents extreme bending.

  Each connecting shaft 24 of the annular frame 2 is provided with a roller 3. The roller 3 is a cylindrical body made of synthetic resin or metal, and is supported so as to be rotatable around the connecting shaft 24 via a bearing 25. The roller 3 rotates in contact with the belt-shaped member 100 and the inner surface of the rehabilitation pipe 10 when the rehabilitation pipe 10 is formed. A belt-like member 100 is wound around the outer periphery of the annular frame 2 and guided in a spiral manner.

  The annular frame 2 is provided with a joining mechanism portion 4. A bracket 7 (see FIG. 5 and the like) for connecting the joining mechanism portion 4 is attached to the annular frame 2 via the first connection plate 222 and the second connection plate 232 of the link body 21. A specific configuration of the bracket 7 will be described later.

  FIG. 4 is a side view showing the outer roller 51 and the inner roller 61 of the pipe making apparatus 1 in a partially broken view. The joining mechanism part 4 is mainly composed of a pinch roller part in which an outer roller 51 disposed on the outer peripheral side of the annular frame 2 and an inner roller 61 disposed on the inner peripheral side thereof are combined. Further, the joining mechanism unit 4 includes a hydraulic motor 64 that rotationally drives the outer roller 51 and the inner roller 61. The outer roller 51 and the inner roller 61 are rotationally driven in directions opposite to each other via a reduction gear (for example, gears 412 and 413 of the gear box 62).

  In the illustrated embodiment, the outer roller 51 is provided in the outer roller unit 5, and the inner roller 61 is provided in the inner roller unit 6 disposed on the inner peripheral side of the outer roller unit 5.

  The outer roller unit 5 includes an outer roller 51 and a rigid gear box 52, and rotatably supports a rotation shaft 511 of the outer roller 51. As shown in FIG. 4, the gear box 52 holds a gear 411 that is one of the gears constituting the gear mechanism 41 inside. The gear 411 is fixed to the rotation shaft 511 of the outer roller 51.

  The outer roller 51 includes a plurality of large diameter rollers 512 and a plurality of small diameter rollers 513. The large-diameter roller 512 has a width that can be inserted between adjacent ribs 102 of the belt-like member 100.

  Here, as shown in FIG. 11A, the belt-like member 100 is configured such that a plurality of ribs 102 having a T-shaped cross section are provided on a belt-like substrate 101. On one side edge portion of the substrate 101, a bonding convex portion 103 is erected. On the other side edge portion of the substrate 101, a stepped portion 104 having a thickness of the substrate 101 is formed so that the side edge portion of the substrate 101 provided with the bonding convex portion 103 can be disposed. The stepped portion 104 is provided with a bonding concave portion 105 into which the bonding convex portion 103 is fitted. The strip-shaped member 100 is formed with inclined ribs 106 that are inclined so as to be positioned on the protruding side of the bonding recess 105 as the distance from the substrate 101 increases. As shown in FIG. 11 (b), the inclined rib 106 is locked to the rib 102 of the adjacent band member 100.

  The outer peripheral surface of the large-diameter roller 512 of the outer roller 51 rotates between the adjacent ribs 102 of the belt-shaped member 100 in contact with the back surface of the substrate 101 of the belt-shaped member 100 (the surface on the side serving as the outer peripheral surface of the rehabilitation pipe 10). The small-diameter roller 513 is provided on the rotation shaft 511 so as to correspond to the inclined rib 106 of the belt-like member 100, and presses and stops the inclined rib 106 against the adjacent rib 102. Further, the outer peripheral surface of the large diameter roller 512 is knurled. Thereby, the outer roller 51 rotates while making contact with the joined belt-like member 100 (rehabilitation pipe 10) without slipping.

The outer roller 51 provided with the large-diameter roller 512 and the small-diameter roller 513 on the rotating shaft 511 is provided exposed to the outer roller unit 5.

  A spacer roller 53 is provided on the front surface of the outer roller unit 5. The spacer roller 53 is provided coaxially with the rotation shaft 511 of the outer roller 51, and has an outer diameter that makes the outer peripheral surface contact the inner surface of the existing pipe 200.

  The outer roller unit 5 is detachably coupled to the inner roller unit 6. In the illustrated embodiment, as shown in FIG. 2, a pin member 54 is provided on one side of the outer roller unit 5 and is pivotally attached to the inner roller unit 6. The outer roller unit 5 can be opened around the pin member 54.

  A closing member 55 is provided on the other side of the outer roller unit 5. In the closing member 55, a connecting bolt fitted with a coil spring is screwed into a receiving portion on a side portion of the inner roller unit 6, and is fixed by tightening a nut to close the outer roller unit 5. In the outer roller unit 5, the tightening amount with respect to the inner roller unit 6 is appropriately adjusted by the elasticity of the coil spring in the closing member 55. The outer roller unit 5 can be detached from the inner roller unit 6 by releasing the closing of the closing member 55 and removing the pin member 54.

  As shown in FIG. 4, the inner roller unit 6 includes an inner roller 61, a gear box 62, and an inner frame 63 coupled to the gear box 62. The inner roller 61 is made of a synthetic resin or metal cylinder, and is formed such that its axial length is at least twice as long as the width of the strip member 100. The inner roller 61 supports the belt-shaped member 100 and the renovated pipe 10 that are pressed from the outer peripheral side, and rotates while contacting the inner surface of the belt-shaped member 100 (the surface on which the rib 102 is not erected).

  The gear box 62 holds a gear 412 of a gear mechanism 41 that allows the inner roller 61 and the outer roller 51 to rotate synchronously. The gear 412 is fixed to the rotation shaft 611 of the inner roller 61. A gear box 52 of the outer roller unit 5 is attached to the gear box 62 via a closing member 55. Thereby, the gears 411 and 412 provided on both sides mesh with each other.

  The output shaft of the hydraulic motor 64 is rotatably supported by the gear box 62 together with the rotation shaft 611 of the inner roller 61. The gear 413 fixed to the output shaft of the hydraulic motor 64 is disposed so as to mesh with the gear 412 fixed to the rotating shaft 611. The gear mechanism 41 can adjust the number of rotations of the rotation shafts 611 and 511 of the inner roller 61 and the outer roller 51 by adjusting the number of teeth of the gears 411, 412, and 413.

  As shown in FIG. 1, the hydraulic motor 64 is driven by the pressure oil supplied from the hydraulic unit 93 via the pressure oil hose. The hydraulic unit 93 is driven by electric power supplied from the generator 92. A pressure oil hose extending from the hydraulic unit 93 is connected to the hydraulic motor 64 via a rotary joint. Thereby, pressure oil can be supplied without affecting the circular movement of the annular frame 2. The hydraulic motor 64 may be provided in a gear box separate from the inner roller unit 6 so as to be detachable from the inner roller unit 6.

  One end of the rotation shaft 611 of the inner roller 61 is rotatably supported by the gear box 62. Further, the other end of the rotating shaft 611 is supported by the inner frame 63 of the inner roller unit 6.

  The inner frame 63 is formed of a steel material having rigidity and has sufficient strength. As shown in FIGS. 5 and 6, the inner frame 63 includes side plates 631 and 631 extending in parallel along the rotation shaft 611 of the inner roller 61, and a tip plate 632 that integrally couples these side plates 631. Is configured in a rectangular shape. One end of the side plate 631 is joined to the back plate 621 of the gear box 62 and is supported in a cantilever manner. In addition, the rotating shaft 611 of the inner roller 61 is rotatably supported on the tip plate 632 via a bearing or the like. The outer diameter of the inner roller 61 is set so that its outer peripheral surface is located slightly outward from the outer peripheral line of the annular frame 2, and the rotation shaft 611 is disposed closer to the outer side of the inner frame 63. Yes.

  The rotation shaft 611 of the inner roller 61 and the rotation shaft 511 of the outer roller 51 are arranged so that the axial direction is orthogonal to the lead angle of the rehabilitation pipe 10. Thus, when the hydraulic motor 64 is rotationally driven, the gears 412 and 411 fixed to the output shaft, the rotation shaft 611 of the inner roller 61, and the rotation shaft 511 of the outer roller 51 and meshing with each other are connected to the inner roller 61 and the outer roller 61, respectively. The rollers 51 are rotated in opposite directions. The inner roller 61 and the outer roller 51 operate so as to sandwich the belt-like member 100 between them and send them forward along a plurality of rollers 3 provided on the annular frame 2.

  The inner roller unit 6 is held by a bracket 7 that is integrally connected to the link body 21 of the annular frame 2. The bracket 7 is configured to fix the inner roller unit 6 in the stored state and to be removable from the stored state.

  5 and 6 are perspective views showing an example of the bracket 7 and the inner roller unit 6 provided on the annular frame 2. In addition, in FIG. 5, the perspective view which looked at the bracket 7 and the inner roller unit 6 from diagonally forward with respect to the front of the pipe making apparatus 1 is shown, and the upper part in the figure is the pipe making apparatus 1 (and the existing pipe 200). The inner periphery side and the lower side in the figure are shown as the outer periphery side.

  The bracket 7 is made of a steel material having rigidity and has sufficient strength. As shown in the drawing, the bracket 7 is formed to have a size capable of accommodating the inner frame 63 of the inner roller unit 6 inside, and side plates 71 and 71 having a length corresponding to the inner frame 63 are end faces of the inner frame 63. These side plates 71 are formed in a rectangular shape joined by an end face plate 72 at the rear end. Further, the front end portion of the bracket 7 is opened to serve as an insertion port for the inner frame 63. The bracket 7 is also formed to open in the outer peripheral side direction and the inner peripheral side direction in the annular frame 2.

  On the outer surface of both side plates 71 of the bracket 7, a joining plate 73 to be joined to the link body 21 is provided. Each joining plate 73 is formed to have substantially the same length as the first connecting plate 222 or the second connecting plate 232 of the link body 21, and is attached along the longitudinal direction of the side plate 71. The joining plate 73 is provided with bolt insertion holes 731 for joining the first connecting plate 222 or the second connecting plate 232 of the link body 21 at appropriate intervals. These joining plates 73 are provided with a predetermined mounting angle with respect to the side plate 71 in accordance with the mounting angle between the link bodies 21 or the radius of curvature of the inner surface of the existing pipe 200. Thereby, the bracket 7 can be attached to any link body 21 constituting the annular frame 2 and is provided integrally with the link body 21 to constitute a part of the ring.

  The bracket 7 is provided with guides 75 on side plates 71 facing each other. In the illustrated embodiment, the guide 75 is configured to have a concave groove 751 on the inner surface of each side plate 71. The concave groove 751 is formed in the front-rear direction with a certain width by stepped portions extending in the longitudinal direction on the inner peripheral edge and the outer peripheral edge of the side plate 71.

  With respect to the bracket 7, the inner roller unit 6 is provided with a sliding portion 65 that slides along the guide 75. The sliding portion 65 is formed on each side plate 631 of the inner frame 63, and includes a protrusion 651 that protrudes on the outer surface along the axial direction of the inner roller 61. Each ridge 651 is formed with a certain width dimension that can slide inside the concave groove 751 of the guide 75 of the bracket 7.

  The sliding portion 65 of the inner roller unit 6 and the guide 75 of the bracket 7 are formed so as to have a gap in the mutual fitting when engaged. That is, the width of the ridge 651 of the sliding portion 65 of the inner roller unit 6 is smaller than the groove width of the concave groove 751 of the bracket 7.

  Thereby, when the sliding portion 65 of the inner roller unit 6 is slid and inserted into the guide 75 of the bracket 7, the inclination of the inner roller unit 6 in the front-rear direction (the axial direction of the inner roller 61) is allowed in the bracket 7. Is done. When the inner roller unit 6 is housed in the bracket 7, the ridge 651 of the sliding portion 65 is engaged with and held by one step of the concave groove 751 of the guide 75. Further, the inner roller unit 6 can be easily inserted into and removed from the bracket 7.

  The bracket 7 is provided with a fixing means for fixing the inner roller unit 6 in the stored state. In the illustrated embodiment, a bridge 74 is provided on the inner peripheral side of the bracket 7 so as to straddle both ends in the longitudinal direction of the side plates 71, 71. Further, the bridge 74 includes a bolt insertion hole in the center portion and the fixing portion 742, and the bolt 741 is screwed into each bolt insertion hole from the inner peripheral side of the annular frame 2. Correspondingly, the inner roller unit 6 is provided with receiving portions 66 at the front and rear end portions of the inner frame 63, where the tip ends of the bolts 741 are in pressure contact, facing the inner peripheral side.

  Thereby, in a state where the inner roller unit 6 is housed in the bracket 7, the bolts 741 are screwed into the bolt insertion holes of the bridge 74 and tightened so as to be in pressure contact with the receiving portion 66, so that the inner frame is attached to the bracket 7. 63 can be fixed. The inner roller unit 6 is pressed to the outer peripheral side of the annular frame 2 with the sliding portion 65 engaged with the guide 75 inside the bracket 7 and is integrally fixed.

  In the pipe making apparatus 1 configured as described above, when a problem occurs in the inner roller 61 during the pipe making operation in the existing pipe 200, the pipe making apparatus 1 is temporarily stopped and the outer roller unit 5 is moved to the inner roller unit. 6, and the bolts 741 of the bracket 7 fixing the inner roller unit 6 are loosened. Since the sliding portion 65 of the inner roller unit 6 and the guide 75 of the bracket 7 have a gap in their fitting, when the bolt 741 is released, the inner roller unit 6 is loosely inserted into the bracket 7. be able to. Thereby, it becomes possible to space apart the inner roller 61 and the belt-like member 100 (and the rehabilitation pipe 10) that are in pressure contact with the inner roller 61. Further, the contact pressure with the belt-like member 100 that has acted on the inner roller 61 can be released. Therefore, the inner roller unit 6 can be easily extracted from the bracket 7 of the annular frame 2 to the front (front side) of the pipe making apparatus 1.

  As a result, even in a narrow space in the existing pipe 200, it is easy to repair or replace the inner roller 61, and it is possible to easily correct the defect in a short time. When the repair or replacement work is completed, the inner roller unit 6 can be inserted into the bracket 7 from the front and stored, and the bolt 741 can be tightened to be easily fixed to the annular frame 2 to resume the pipe making work. It becomes possible to do. Therefore, it is possible to efficiently form the rehabilitation pipe 10 with high accuracy without incurring a prolonged construction period.

  Further, the sliding portion 65 of the inner roller unit 6 and the guide 75 of the bracket 7 may be configured as shown in FIG. In this case, the guide 75 on the inner side of the bracket 7 is a concave groove 751 having a constant width, whereas the sliding portion 65 on the outer surface of the inner roller unit 6 is in the base direction of the inner roller 61, that is, the pipe manufacturing apparatus 1. The width is reduced in the forward direction relative to. In this case, the sliding portion 65 of the inner roller unit 6 and the guide 75 of the bracket 7 increase the gap amount of the mutual fitting toward the base portion of the inner roller 61.

  In the illustrated embodiment, the sliding portion 65 has a slope surface that faces the inner peripheral side of the annular frame 2 upward, and has a slope surface 652 that is downwardly inclined toward the base portion of the inner roller 61. In the inner roller unit 6 shown in FIG. 5, the ridges 651 are formed in the front-rear direction with a certain width. On the other hand, in the form shown in FIG. 7, the step on the inner peripheral side of the ridge 651 forms a downwardly inclined surface 652 in the forward direction. Thereby, the width of the ridge 651 is provided so as to gradually become smaller in the forward direction of the inner roller unit 6.

  Therefore, the clearance gap between the sliding portion 65 of the inner roller unit 6 and the guide 75 of the bracket 7 is increased toward the front side. Further, the descending slope of the ridge 651 of the sliding portion 65 is set in consideration of the axial length of the inner roller 61 and the pulling slope that can be easily pulled out when the inner roller unit 6 is pulled out from the bracket 7. Has been.

  A fixing means for fixing the inner roller unit 6 to the bracket 7 in a stored state is provided at the front end of the bracket 7. That is, the bolt 741 is screwed into the bolt insertion hole of the fixing portion 742 of the bridge 74 from the inner peripheral side of the annular frame 2 and fixed. Thereby, the front end portion having a large gap between the ridge 651 and the groove 751 can be pressed, and the inner roller unit 6 can be fixed to the bracket 7. On the contrary, the inner roller unit 6 can be loosely inserted into the bracket 7 by loosening the bolt 741. As a result, the inner roller 61 and the belt-like member 100 (rehabilitation pipe 10) that is in pressure contact with the inner roller 61 can be separated from each other, and the inner roller unit 6 can be easily extracted.

  In this form, the joining mechanism part 4 is located in the upper half part of the pipe making apparatus 1, and as shown in FIG. 8, the inner roller unit 6 is disposed below the belt-like member 100 (rehabilitated pipe 10). It is preferable to stop the pipe making apparatus 1 at. Then, the outer roller unit 5 is removed from the inner roller unit 6, and the bolts 741 fixed to the bracket 7 are loosened and removed.

  Since the inner roller unit 6 is loosely inserted into the bracket 7 and the inclined surface 652 is provided on the ridge 651, the inner roller unit 6 is inclined forward by its own weight. At this time, the gradient surface 652 of the sliding portion 65 of the inner roller unit 6 is engaged with and held by a step portion on the inner peripheral side of the concave groove 751 of the bracket 7. As shown in FIG. 9, the inner roller 61 is separated from the belt-like member 100 and released from the contact pressure, and tilts in the pulling direction.

  Thereby, as shown in FIG. 10, the inner roller unit 6 can be easily pulled out from the bracket 7 in the front direction. Since this drawing operation can be performed from the front side of the pipe making apparatus 1, a working space is ensured and can be easily performed without difficulty. Therefore, even inside the existing pipe 200, the inner roller 61 can be repaired or replaced easily, and the defect can be corrected in a short time.

  The pipe making apparatus 1 according to the present invention is not limited to the above-described embodiment, and can be implemented in various other forms besides this form.

  For example, in the pipe manufacturing apparatus 1, the guide 75 provided on the inner surface of the bracket 7 and the sliding portion 65 provided on the outer surface of the inner roller unit 6 are slid along the guide 75. Any other configuration is possible as long as it can move. For example, the sliding portion 65 of the inner roller unit 6 includes a concave groove along the axial direction of the inner roller 61, whereas the guide 75 of the bracket 7 includes a ridge that slides the concave groove outward. It may be a configuration. In that case, a step surface of the concave groove of the sliding portion 65 may be provided with a downwardly inclined surface that faces the inner peripheral side of the annular frame 2 upward.

  Further, the fixing means between the inner roller unit 6 and the bracket 7 is not limited to the above-described form, and any configuration may be used as long as the inner roller unit 6 is fixed in the stored state. Further, the pipe manufacturing apparatus 1 may have a configuration in which the brackets 7 are provided at a plurality of locations on the annular frame 2 and the outer roller unit 5 and the inner roller unit 6 are provided at a plurality of locations on the annular frame 2. Further, the drive source for rotating the outer roller 51 and the inner roller 61 may be an electric motor, an air motor, a hydraulic motor, or the like in addition to the hydraulic motor 64. As a speed reducer, a chain sprocket is used in addition to the gear. May be.

  In addition, in the pipe manufacturing apparatus 1 which concerns on this invention, the strip | belt-shaped member 100 used for comprising the rehabilitation pipe | tube 10 is not limited to the strip | belt-shaped member 100 shown to Fig.11 (a) and FIG.11 (b), For example, A configuration in which a reinforcing member 110 made of a metal plate obtained by bending a strip-shaped steel plate into a substantially W-shaped cross-section over a plurality of ribs 102 may be mounted. Moreover, as shown to Fig.12 (a) and FIG.12 (b), the strip | belt-shaped member which joins the adjacent main strip | belt-shaped member 120 with the joining material 130, and forms a rehabilitation pipe | tube may be sufficient. The main belt-shaped member 120 has a plurality of ribs 122 having a T-shaped cross section on the substrate 121, and grooves 123 are formed at both ends of the substrate 121. The bonding material 130 has a fitting protrusion 131 that fits into the groove 123 of the main belt-shaped member 120.

(Rehabilitation method for existing pipes)
Next, a construction procedure for rehabilitating the existing pipe 200 using the above-described pipe manufacturing apparatus 1 will be described.

  As shown in FIG. 1, the existing pipe 200 is provided with manholes 201 and 202 with a predetermined span. In this case, the rehabilitation pipe 10 is manufactured from the upstream manhole 201 toward the downstream manhole 202.

  On the ground of the upstream manhole 201, a drum 91 with a turntable on which the belt-like member 100 is wound is installed. A generator 92 is installed on the ground of the downstream manhole 202. The pipe making apparatus 1 and the hydraulic unit 93 are carried into the existing pipe 200 to be rehabilitated.

  Since the annular frame 2 can be disassembled and assembled, the pipe making apparatus 1 can be easily carried into the upstream manhole 201 and can be assembled in the existing pipe 200. Since the joining mechanism 4 can be retrofitted to the annular frame 2, the inner roller unit 6 and the hydraulic motor 64 are attached to the bracket 7 of the assembled annular frame 2, and then the outer roller unit 5 is attached.

  When such preparatory work is completed, the belt-like member 100 is drawn into the existing pipe 200 from the ground drum 91. Then, the belt-like member 100 is inserted between the inner roller 61 and the outer roller 51 in the joining mechanism portion 4 of the pipe producing apparatus 1.

  Next, the belt-like member 100 is sent out to the outside of the roller 3 of the annular frame 2 (see FIG. 2). Further, the pipe manufacturing apparatus 1 is rotated about the axis, and the fed strip member 100 is wound around the outer peripheral surface of the annular frame 2 for two to three turns. Thereby, the rehabilitation pipe | tube 10 for a pipe making start is formed.

  Subsequently, the joining mechanism portion 4 of the pipe manufacturing apparatus 1 is driven to rotate the outer roller 51 and the inner roller 61. The outer roller 51 and the inner roller 61 feed the belt-shaped member 100 between them. Further, the joining mechanism portion 4 revolves (revolves) along the strip member 100 in the direction opposite to the feeding direction.

  In the joining mechanism portion 4, the belt-like member 100 is joined to each other while fitting the joining convex portion 103 and the joining concave portion 105. That is, as shown in FIG. 11A, the joining convex portion 103 of the belt-like member 100 that follows the loop is delayed in the joint concave portion 105 of the preceding belt-like member 100. Further, the side edge portion of the substrate 101 of the succeeding strip member 100 overlaps the stepped portion 104 of the preceding strip member 100. The inclined rib 106 of the belt-like member 100 is engaged with the rib 102 of the subsequent belt-like member 100. Thereby, the rehabilitation pipe 10 is additionally formed.

  If a problem occurs in the inner roller 61 during such pipe making work, the pipe making apparatus 1 is stopped, the inner roller unit 6 is extracted from the bracket 7 of the annular frame 2, and the inner roller 61 can be removed. it can. Further, the outer roller unit 5 can be detached from the inner roller unit 6 and the annular frame 2.

  In the case of such a conventional pipe making apparatus, when such a problem occurs, it has been necessary to disassemble the inner roller 61 by disassembling many parts constituting the joining mechanism part and its peripheral parts. Moreover, after repairing or exchanging the location where the failure occurred, it was necessary to reassemble many parts constituting the joining mechanism part, attach them to peripheral parts, and return them to their original state. Since such repair or replacement work took at least 2 to 4 hours, if such a problem occurs, a delay in the process cannot be avoided.

  On the other hand, in the pipe making apparatus 1 according to the present embodiment, the inner roller unit 6 and the outer roller unit 5 are easily removed from the annular frame 2 by the work from the front side of the pipe making apparatus 1 in the existing pipe 200. Can do. For this reason, even in a narrow space in the existing pipe 200, it is easy to repair the location where the failure occurs, and the inner roller 61 and the outer roller 51 can be replaced. Furthermore, it is possible to replace the inner roller unit 6 itself and the outer roller unit 5 itself. Therefore, repair or replacement work can be performed efficiently in a short time, and when these work is completed, the inner roller unit 6 is housed in the bracket 7 and fixed to the annular frame 2 so that it can be easily restored to its original state. Can be returned.

  With such repair or replacement work, it can be done in about several tens of minutes, and it does not take many hours. For example, the outer roller unit 5 can be removed or attached in about 5 minutes, and the inner roller unit 6 can be removed or attached in about 5 minutes. By exchanging the entire unit, the work can be completed very easily and in a short time. Therefore, it is possible to efficiently form the rehabilitated pipe 10 with high accuracy without incurring process delays or lengthening the construction period.

  When the tip of the rehabilitation pipe 10 reaches the downstream manhole 202, the driving of the pipe making apparatus 1 is stopped. And the pipe making apparatus 1 is disassembled and carried out from the downstream manhole 202 in a disassembled state. A backfilling material such as curable mortar is injected into the gap between the rehabilitated pipe 10 and the existing pipe 200 and cured to complete the rehabilitation of the existing pipe 200.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as a pipe making apparatus for rehabilitating existing pipes such as aged sewer pipes, water pipes, agricultural water pipes, gas pipes and the like using strip members.

DESCRIPTION OF SYMBOLS 1 Pipe manufacturing apparatus 2 Annular frame 21 Link body 22 1st link frame 23 2nd link frame 3 Roller 4 Joining mechanism part 41 Gear mechanism 5 Outer roller unit 51 Outer roller 52 Gear box 53 Spacer roller 6 Inner roller unit 61 Inner roller 62 Gear box 63 Inner frame 64 Hydraulic motor 65 Sliding part 651 Convex strip 652 Gradient surface 7 Bracket 73 Joint plate 75 Guide 751 Concave groove 741 Bolt 10 Rehabilitation pipe 100 Strip member 102 Rib 103 Joint convex part 105 Joint concave part

Claims (6)

It is a pipe making device that forms a tubular shape by winding and joining a long belt-like member in a spiral shape,
An annular frame that circulates along the inner surface of the existing pipe;
An inner roller and an outer roller that sandwich the preceding part and the following part of the belt-shaped member;
The inner roller is provided in an inner roller unit that rotatably supports a rotating shaft thereof, and the annular frame is provided with a bracket that holds the inner roller unit,
The bracket has a guide on the inner surface facing each other, the inner roller unit has a sliding portion that slides along the guide on the outer surface, and the inner roller unit is housed in the bracket so as to be inserted and removed. A pipe making apparatus characterized by comprising: The pipe making apparatus according to claim 1,
The said sliding part is provided with the protruding item | line arrange | positioned along the axial direction of the said inner roller, The said guide is provided with the ditch | groove which slides this protruding item | line inside. The pipe making apparatus according to claim 1,
The said sliding part is provided with the concave groove arrange | positioned along the axial direction of the said inner roller, The said guide is provided with the protruding item | line which slides this concave groove to the outer side, The pipe manufacturing apparatus characterized by the above-mentioned. In the pipe manufacturing apparatus as described in any one of Claims 1-3,
The inner roller unit has a gap in the fitting between the sliding portion and the guide of the bracket, and the bracket includes fixing means for fixing the inner roller unit in a stored state. The pipe making apparatus according to claim 4, wherein
The pipe making apparatus according to claim 1, wherein the sliding portion has a downwardly inclined surface in a forward direction in which the inner roller unit is pulled out from the bracket, and has an inclined surface facing the inner peripheral side of the annular frame upward. In the pipe making apparatus according to any one of claims 1 to 5,
The outer roller is provided in an outer roller unit that rotatably supports a rotating shaft thereof, and the outer roller unit is detachably coupled to the inner roller unit.

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