Pipe making machine

Abstract

To provide a pipe making machine capable of simplifying a structure, thereby reducing a weight, and also capable of being made into a divided structure, and capable of reducing a force received from flowing water in a pipe culvert.SOLUTION: A pipe making machine 10 that constructs a tubular body 13 by spirally arranging long materials 12 in a pipe culvert 11 and connecting adjacent long materials 12 to each other includes: a ring-shaped long member support frame 14 that is movably arranged in a part of the pipe culvert 11; and a winding device 15 that winds the long material 12 around the long member support frame 14. The long member support frame 14 is formed into a shape corresponding to an inner peripheral surface of the tubular body 13 and has an outer peripheral surface 14c around which the long material 12 is wound, and the outer peripheral surface 14c is formed flat in an axial direction of the pipe culvert 11. Furthermore, if a lift device 16 is provided to support the long member support frame 14 at a position elevated from a bottom 11a of the pipe culvert 11, the outer peripheral surface 14c can be supported from an outside of the tubular body 13 to raise the long member support frame 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pipe making machine for constructing tubular bodies in a culvert. [Background technology]

[0002] A conventional method for constructing a tubular body inside a sewer is to construct a tubular body by spirally arranging long materials inside an existing sewer and connecting adjacent long materials together, and then to construct a composite pipe by integrating the tubular body with the existing sewer using, for example, backfill material.

[0003] In this type of construction method, a pipe making machine is used to arrange the long materials in a spiral and connect them together. For example, Patent Document 1 discloses a pipe making machine that has a regulating frame arranged inside a pipe culvert and a flexible forming frame arranged to surround the entire outer periphery of the regulating frame.

[0004] In this type of pipe-making machine, the forming frame has a number of inner rollers, each connected by a link. Each inner roller is supported by a guide so that it can move around the outer periphery of the regulating frame. An outer roller is provided in a drive mechanism fixed to a part of the forming frame. The forming frame moves around the outer periphery of the regulating frame while sandwiching the strip-shaped material between the outer roller and the inner roller, thereby arranging and connecting the strip-shaped material in a spiral to form a tubular body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-214178 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in such conventional pipe making machines, the forming frame, which connects many inner rollers, is movably arranged around the regulating frame via guides, so the regulating frame must movably support the forming frame, which has a complex configuration, and is thick and heavy to ensure sufficient rigidity. Moreover, because the special forming frame is arranged around the entire outer periphery of the regulating frame, the weight of the entire pipe making machine becomes even heavier, and installing and moving it inside the pipe culvert places a heavy burden on the worker. Furthermore, to ensure the strength of the complex structure, it is not easy to make it a divided structure. Furthermore, when installed inside the sewer, the pipe making machine, including the restricting frame and forming frame arranged perpendicular to the axial direction of the sewer, was thick. Therefore, when the pipe making machine was arranged perpendicular to the flowing water, the area that obstructed the flowing water was large and the force from the flowing water was also large.

[0007] Therefore, the object of the present invention is to provide a pipe making machine that can simplify the structure, thereby significantly reducing its weight, and can easily be made into a split structure, thereby reducing the force applied by flowing water inside the sewer. [Means for solving the problem]

[0008] The pipe making machine of the present invention, which solves the above-mentioned problems, is a pipe making machine that arranges long materials in a spiral within a pipe culvert and connects adjacent long materials to construct a tubular body, and is characterized in that it is equipped with an annular long material support frame that is arranged to be movable in part of the axial direction of the pipe culvert, and a winding device that wraps the long materials around the outer periphery of the long material support frame, and this winding device is equipped with an annular moving guide that is fixed to the end of the long material support frame so as to follow the inner surface of the pipe culvert, and a coaster that moves self-propelled along the moving guide, winding consecutive long materials around the outer periphery of the long material support frame in sequence and connecting the long materials together.

[0009] According to the pipe making machine of the present invention, an annular moving guide is fixed to the end of the annular long material support frame. The coaster, which wraps the long materials around the outer periphery of the long material support frame to connect the long materials together, can move freely along the moving guide. This eliminates the need to provide a moving part on the long material support frame as in the conventional case, and simplifies the structure of the pipe making machine.

[0010] According to the present invention, the weight of the long material support frame can be reduced, and by simplifying and lightening the structure of the long material support frame, a split structure can be made, which allows the entire device to be made smaller, making it easier to transport the pipe making machine into the sewer. Furthermore, since there is no need to provide a movement mechanism around the periphery of the long material support frame, the thickness of the long material support frame can be made thinner, which reduces the force received from flowing water in the sewer.

[0011] In the pipe making machine of the present invention, the moving guide is preferably installed inside the outer periphery of the end of the long material support frame and has a rack gear shaped to fit along the inner circumferential surface of the pipe, and the coaster has a pinion gear that meshes with the rack gear and is driven to rotate. In this way, the coaster can easily move freely along the inner surface of the pipe by the rack gear, simplifying the coaster drive mechanism for placing the long material along the inner circumferential surface.

[0012] The moving guide preferably has guide rails that support the coaster inside the long material support frame, which allows the coaster to be oriented stably without requiring any structure that protrudes from the outer periphery of the long material support frame, and allows newly supplied long material to be easily connected to the wound long material.

[0013] In the pipe making machine of the present invention, it is advantageous that at least the end of the long material support frame is provided with an annular outer peripheral surface around which the long material is wound, which is the outermost part of the long material support frame, so that the long material support frame can be easily moved in the axial direction of the pipe inside the tubular body that is successively formed by spirally winding the long material.

[0014] In the pipe making machine of the present invention, the coaster preferably includes a fitting coaster for fitting adjacent long materials together while winding the long materials around the long material support frame, and a guide coaster for supplying the introduced long materials to the fitting coaster in the same direction, the fitting coaster and the guide coaster running on the same moving guide. This configuration allows for a simple structure in which the guide coaster follows the fitting coaster. Therefore, a structure can be easily constructed for supplying continuously introduced long materials to the fitting coaster in an orientation that makes it easy to fit them.

[0015] The pipe making machine of the present invention preferably has a plurality of coasters, each of which has a common drive unit for self-propelling the same moving guide, and each of which has a functional unit connected to the drive unit to perform a different function. This makes it easy to produce a plurality of coasters with different functions. Furthermore, by using a common drive unit, it is easy to add coasters with other functions.

[0016] In the pipe making machine of the present invention, the long material support frame and moving guide preferably consist of multiple segments, each of which has a partial long material support frame and a partial moving guide integrally therewith, and the multiple segments are connected circumferentially to form the long material support frame and moving guide in an annular shape. This allows the long material support frame and moving guide to be carried in and out as separate segments when transporting the pipe making machine into a duct or when transporting it out of the duct after construction. In particular, the long material support frame and moving guide can be installed together simply by connecting the segments inside the duct, greatly improving workability during transport. [Effects of the Invention]

[0017] According to the pipe making machine of the present invention, the structure of the pipe making machine can be simplified, thereby making it lighter and easier to make it into a divided structure, and it is possible to provide a pipe making machine that can reduce the force received from flowing water in the sewer. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a front view of a pipe making machine according to an embodiment of the present invention, showing a state in which a tubular body is being constructed. [Figure 2] FIG. 1 is a perspective view of a pipe making machine according to an embodiment of the present invention. [Figure 3] FIG. 1(a) is a cross-sectional view showing an example of a long material used in this embodiment, and FIG. 1(b) is a cross-sectional view showing a state in which adjacent long materials are connected to each other. [Figure 4] FIG. 2 is a perspective view of a long material support frame of the pipe making machine according to the present embodiment. [Figure 5] FIG. 5 is a partial cross-sectional view of the long material support frame shown in FIG. [Figure 6] FIG. 4 is a perspective view showing a part of a divided body of the long material support frame. [Figure 7] FIG. 2 is a perspective view of a fitting coaster of the pipe making machine according to the present embodiment. [Figure 8] FIG. 8 is an exploded perspective view of the fitting coaster shown in FIG. 7, excluding the coaster plate. [Figure 9] FIG. 3 is a perspective view of the bottom side of the coaster plate. [Figure 10] FIG. 4 is a partial cross-sectional view showing the state in which the fitting coaster is attached to the long material support frame. [Figure 11] This is an exploded oblique view of the guide coaster of the pipe making machine of this embodiment, excluding the coaster plate. [Figure 12] 12A and 12B are schematic cross-sectional views of the guide box of the guide coaster shown in FIG. 11, where (a) is a schematic cross-sectional view taken along the direction in which the long material is inserted, and (b) is a schematic cross-sectional view taken along a direction perpendicular to the direction in FIG. [Figure 13] A partial cross-sectional view showing the guide coaster of the pipe making machine of this embodiment attached to the long material support frame. [Figure 14] A partial oblique view showing the state in which a long material is wound around a long material support frame using the fitting coaster and guide coaster of the pipe making machine of this embodiment. [Figure 15] FIG. 2 is a perspective view of a lift device of the pipe making machine according to the present embodiment. [Figure 16]FIG. 16 is a front view of the lift device shown in FIG. [Figure 17] FIG. 10 is a partial front view of the long material support frame supported by the lift device. [Figure 18] FIG. 10 is a partial side view of the long material support frame supported by the lift device. [Figure 19] 1 shows the positional relationship between the pinion gear, rack gear, and tire of the clamping portion of the coaster according to this embodiment, where (a) shows a substantially straight portion, and (b) shows a curved portion. [Figure 20] FIG. 2 is a cross-sectional view showing a state in which the coaster plate according to the present embodiment is used. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of the present invention will be described in detail below with reference to the drawings. In each drawing, the forward side along the axial direction of the pipe is indicated as F, the rear side along the axis is indicated as R, and the width direction perpendicular to the axis is indicated as W.

[0020] Fig. 1 is a front view showing the state in which a pipe making machine of this embodiment is placed in a tubular culvert to construct a tubular body, and Fig. 2 is a perspective view of the pipe making machine of this embodiment. The pipe making machine 10 of this embodiment is an apparatus for helically arranging long materials 12 in a tubular culvert 11 and connecting adjacent long materials 12 to construct a tubular body 13. The tubular culvert 11 in which the tubular body 13 is constructed may have various shapes, such as a circular, rectangular, or horseshoe-shaped cross-sectional shape of the inner circumferential surface, without particular limitation. The tubular culvert 11 of this embodiment has a substantially rectangular cross-sectional shape of the inner circumferential surface with a curved shape that is concave toward the center of the bottom.

[0021] [Long material] FIG. 3(a) is a cross-sectional view showing an example of a long material used in this embodiment, and FIG. 3(b) is a cross-sectional view showing a state in which adjacent long materials are connected to each other. The elongated material 12 comprises a strip-shaped material 12X formed into a long length with a constant irregular cross section from a resin such as polyvinyl chloride, and a plastically deformable material 12Y formed into a long length with a constant cross section from a plastically deformable metal, which is fitted over the entire length of the strip-shaped material 12X. The inner surface 12a constituting the inner peripheral surface of the tubular body 13 of the strip-shaped material 12X is formed substantially flat, and the outer surface 12b constituting the outer peripheral surface of the tubular body 13 is formed by a plurality of projections 12c continuous in the longitudinal direction at a constant height.

[0022] A recessed groove 12d and a locking piece 12f are provided in a constant shape and are continuous in the longitudinal direction on one side edge of the elongated material 12. On the other hand, a protruding strip 12e that can fit into the recessed groove 12d and a receiving portion 12g that has a shape that can lock the locking piece 12f are provided in a constant shape and are continuous in the longitudinal direction on the other side edge of the elongated material 12.

[0023] The tubular body 13 is constructed by spirally winding the long material 12 roughly along the inner wall surface of the duct 11, and then fitting the ridge 12e on one side edge of adjacent long materials 12 into the recess 12d on the other side edge, and engaging the locking piece 12f on one side edge with the receiving portion 12g on the other side edge. One side edge and the other side edge of adjacent long materials 12 are preferably joined together with a joining material. The long materials 12 are sequentially fed to a long material support frame 14 (described later) of the pipe making machine 10 by, for example, a long material feeding drum (not shown) wound in a roll shape.

[0024] [Pipe making machine] As shown in Figures 1 and 2, a pipe making machine 10 that constructs a tubular body 13 from long materials 12 includes a long material support frame 14 that is movably arranged in a portion of the axial direction of the duct 11, a winding device 15 that wraps the long material 12 around the outer periphery of the long material support frame 14, and a lifting device 16 that supports the long material support frame 14 at a position elevated from the bottom 11a of the duct 11.

[0025] [Long material support frame] 4 is a perspective view of the long material support frame, FIG. 5 is a partial axial cross-sectional view of the long material support frame shown in FIG. 4, and FIG. 6 is a perspective view showing a part of a divided body of the long material support frame. The long material support frame 14 is formed in a ring shape to wind the long materials sequentially fed out from, for example, a drum for feeding the wound long materials and connect the long materials together, and is arranged inside the culvert 11 in a direction perpendicular to the axial direction of the culvert 11. Because the depth length of the long material support frame 14 is significantly shorter than the depth length of the culvert 11, the long material support frame 14 is used by being moved sequentially forward F as the tubular body 13 is constructed.

[0026] The long material support frame 14 has a skeleton 14a formed in a ring shape by arranging and joining a large number of plate materials lengthwise and crosswise, and a surface plate 14b joined to the outer surface of the skeleton 14a. The long material support frame 14 is provided with a generally rectangular annular outer peripheral surface 14c on at least the front end F side for spirally winding the long material 12. The outer peripheral surface 14c may be formed by the outer edge of the framework 14a without the surface plate 14b, but in this embodiment, it is formed by arranging the surface plate 14b continuously around the entire circumference. The outer peripheral surface 14c has a shape corresponding to the inner peripheral surface of the tubular body 13 and is formed so as to continue in a generally constant shape in the axial direction of the culvert 11.

[0027] The long material support frame 14 has an extension surface 14d that continues flatly from the outer peripheral surface 14c to the rear R. In this embodiment, the extension surfaces 14d are provided on haunch portions at the four corners of the approximately rectangular-annular long material support frame 14, and some of the extension surfaces 14d are provided facing downward. The outer peripheral surface 14c and the extension surfaces 14d are continuous with a uniform shape without any borders in the axial direction of the sewer 11. The downward-facing outer peripheral surface 14c and extension surfaces 14d on both the left and right sides of the long material support frame 14 are each inclined downward toward the center of the sewer 11. The downward-facing outer peripheral surface 14c and extension surfaces 14d are formed as curved surfaces that are inclined toward the center. The downward-facing outer peripheral surface 14c and extension surfaces 14d are the parts that are supported by the lift device 16, which will be described later.

[0028] A rotatable ball carrier 14e is provided on the long material support frame 14, protruding further rearward R from the extension surface 14d. This ball carrier 14e is installed to press down on the inner portion of the spirally wound long material 12 and prevent the entire pipe making machine 10 from tilting or shifting position. In this long material support frame 14, the outer peripheral surface 14c on the front F end side is arranged to be the outermost periphery of the long material support frame 14. In other words, each part of the long material support frame 14 is positioned inside the contour shape of the outer peripheral surface 14c of the long material support frame 14 when viewed from the front. Furthermore, a plurality of rollable ball carriers 14j are arranged at multiple locations on the outer peripheral surface 14c of the long material support frame 14, i.e., at the four corners of the rectangle in this embodiment, so as to protrude slightly from the outer peripheral surface. The spirally wound long material 12 is arranged outside of these ball carriers 14j, so friction with the long material 12 can be reduced.

[0029] Furthermore, a rack gear 21a and a guide rail 21b are fixed to the front F side of the long material support frame 14 as a moving guide 21 of the winding device 15 (described later). In this embodiment, as shown in FIG. 6, the long material support frame 14 is composed of divided bodies 14f, 14g, which are divided into multiple circumferential parts with the moving guide 21 fixed thereto. The multiple divided bodies 14f, 14g are formed by integrally fixing together partial long material support frames 14h and partial moving guides 14i, which are formed by dividing the long material support frame 14 and the moving guide 21 in the circumferential direction. Each divided body 14f, 14g has a shape corresponding to the division position. By fastening these multiple divided bodies 14f, 14g adjacent to each other in the circumferential direction, the long material support frame 14 and the moving guide 21 are formed into an annular shape.

[0030] [Wrapping device] The winding device 15 is a device for winding the long material 12 around the outer periphery of the long material support frame 14. As shown in Figures 1 and 2, the winding device 15 has an annular moving guide 21 fixed to the end of the long material support frame 14 so as to follow the inner circumferential surface of the sewer 11, and a coaster 22 that moves freely along the moving guide 21, winding the continuous long material 12 in sequence around the outer periphery of the long material support frame 14 and connecting the long materials 12 together.

[0031] As shown in Figures 4 and 5, the moving guide 21 has an annular rack gear 21a installed inside the outer periphery of the end on the front F side of the long material support frame 14, and an annular guide rail 21b installed on the inside of the long material support frame 14 at a distance from the rack gear 21a on the rear R side.

[0032] The rack gear 21a is installed on the end face of the annular long material support frame 14 so that its gear teeth protrude inward. This rack gear 21a has a shape that fits along the inner peripheral surface of the conduit 11. In this embodiment, it is formed in a substantially rectangular shape, with each side, including the bottom portion corresponding to the bottom portion 11a of the conduit 11, being a linear portion having a substantially linear shape, and corner R portions 21d at the four corners of the rectangle being curved at a constant curvature.

[0033] The rack gear 21a has gear teeth of the same shape formed around its entire circumference that can mesh with a pinion gear 23d (described later). In the rack gear 21a of this embodiment, the thickness of the curved portion of each corner R portion 21d is thicker than that of the straight portion that forms each side of the rectangle. Specifically, the thickness from the tooth tip to the back surface of the rack gear 21a is thicker in the curved portion than in the straight portion. The thickness of each curved portion is formed according to the radius of curvature, and the smaller the radius of curvature, the thicker the thickness. This thickness gradually changes between the straight portion and the curved portion. This allows each pinion gear 23d to move smoothly and continuously between each linear side of the rack gear 21a and the corner R portion 21d, as will be described later.

[0034] The guide rail 21b is provided in a ring shape, protruding inward from the long material support frame 14. The guide rail 21b has a constant cross-sectional shape around its entire periphery and is installed parallel to the rack gear 21a at a constant distance. A rail projection 21c that protrudes in the front-to-rear direction is provided around the entire periphery of the lower end of the guide rail 21b. The rear R side of the coaster 22, which will be described later, is supported by the guide rail 21b.

[0035] [coaster] 1 and 2, the coaster 22 is mounted on the moving guide 21 so as to be self-propelled, and is configured to be able to move in a circular manner along the moving guide 21. The coaster 22 of this embodiment has a mating coaster 22a and a guide coaster 22b. The interlocking coaster 22a is a coaster for winding the long material 12 around the long material support frame 14 while interlocking adjacent long materials 12 together, and the guide coaster 22b is a coaster for supplying the long materials 12 that are continuously introduced from the ground to the interlocking coaster 22a while aligning their orientation.

[0036] The mating coaster 22a and the guide coaster 22b are attached to the same moving guide 21. The mating coaster 22a and the guide coaster 22b attached to the front in the moving direction move on the same moving guide 21 while maintaining a predetermined distance between them. As will be described later, each coaster 22 has a driving unit 23 of the same configuration for self-propelling along the same moving guide 21, and also has functional units 24 and 25 connected to the driving unit 23 and performing different functions.

[0037] [Mating Coaster] Fig. 7 is a perspective view of the interlocking coaster 22a, Fig. 8 is an exploded perspective view of the interlocking coaster 22a excluding the coaster plate 24c, Fig. 9 is a perspective view of the bottom side of the coaster plate 24c, and Fig. 10 is a cross-sectional view of the interlocking coaster 22a attached to the long material support frame 14. The interlocking coaster 22a has a drive unit 23 for self-propelling the moving guide 21, and a function unit 24 connected to the drive unit 23 to perform the functions of the interlocking coaster 22a.

[0038] The drive unit 23 has a drive base 23a, a hydraulic motor 23b fixed to the drive base 23a, a transmission unit 23c connected to the rotating shaft of the hydraulic motor 23b, and a pinion gear 23d and a drive roller 23e connected to the transmission unit 23c. A plurality of pinion gears 23d are arranged coaxially and spaced apart, and each pinion gear 23d meshes with a rack gear 21a of the moving guide 21. In this embodiment, an example of two pinion gears 23d is shown, but three or more pinion gears 23d may be provided. In this embodiment, the rack gear 21a is formed with a width that allows it to mesh with multiple pinion gears 23d. The multiple pinion gears 23d are driven to rotate at the same speed by the driving force of the hydraulic motor 23b. In addition, the drive roller 23e abuts against the inner surface of the long material support frame 14 and is arranged coaxially with the pinion gear 23d, and is driven to rotate together with the pinion gear 23d by the driving force of the hydraulic motor 23b.

[0039] Furthermore, the drive unit 23 includes a clamping unit 23i mounted on the drive base 23a. The clamping unit 23i has a tire 23f that rotatably contacts the back surface of the rack gear 21a, which is the outer peripheral surface of the rack gear 21a. The drive base 23a and the clamping unit 23i are connected via a spring 23j, allowing the clamping unit 23i to elastically displace relative to the pinion gear 23d. A plurality of tires 23f are provided in front of and behind the pinion gear 23d, and rotate while clamping the rack gear 21a between the pinion gear 23d and the tires 23f. As the spring 23j expands and contracts, the position of the clamping unit 23i relative to the drive base 23a changes in response to changes in the meshing position of the pinion gear 23d relative to the rack gear 21a, allowing the tires 23f to follow the outer peripheral surface of the rack gear 21a. Therefore, the rack gear 21a can move smoothly even when clamped between the pinion gear 23d and the tires 23f. Further, on the rear R side of the driving part 23, a hook part 23g is provided which is engaged with and supported by the rail protrusion 21c of the guide rail 21b.

[0040] The functional unit 24 has a fitting base 24a, an inner roller 24b rotatably mounted on the fitting base 24a and supporting the long material 12 from the inside while rotating, and a coaster plate 24c fixed to the fitting base 24a opposite the inner roller 24b. A plate adjustment unit 26 is provided between the fitting base 24a and the coaster plate 24c to adjust the position and orientation of the coaster plate 24c relative to the inner roller 24b.

[0041] The functional unit 24 is connected to the driving unit 23 by connecting a connecting part 24e provided at an end portion on the rear R side of the fitting base 24a to a connected part 23h provided at an end portion on the front F side of the driving base 23a. In this embodiment, the functional unit 24 is connected to the driving unit 23 by fitting and fixing a connecting protrusion of the connecting part 24e into a connecting hole of the connected part 23h. The coaster plate 24c has a pressing piece 24f on its surface facing the functional unit 24 and the drive unit 23, and a claw-shaped portion 24g at its end. The pressing piece 24f is inserted between the protrusions 12c of the elongated material 12 to press the elongated material 12 from the outside. In this embodiment, as shown in FIG. 20, it presses the top of the plastic deformation material 12Y. The claw-shaped portion 24g at the end presses from the outside the recessed groove 12d and the locking piece 12f of the elongated material 12 that has already been spirally wound and that was wound before the elongated material 12 pressed by the pressing piece 24f.

[0042] As shown in Figures 10 and 20, the plate adjustment unit 26 comprises an adjustment base 26a fixed to the end of the drive base 23a, a pivot part 26b provided on the upper end of the drive base 23a, a pressure adjustment piece 26c fixed to the coaster plate 24c and pivoted to the pivot part 26b and arranged on the adjustment base 26a, an inclination adjustment bolt 26d for adjusting the up and down inclination of the pressure adjustment piece 26c relative to the adjustment base 26a, and a front-to-back position adjustment bolt 26e for adjusting the front-to-back position of the coaster plate 24c relative to the adjustment base 26a.

[0043] The plate adjustment unit 26 can tilt the coaster plate 24c using the principle of leverage by tightening or loosening the tilt adjustment bolt 26d. This allows the pressing piece 24f and the claw-shaped portion 24g of the coaster plate 24c to be pressed or loosened. Furthermore, the coaster plate 24c can be moved forward or backward by tightening or loosening the front-to-rear position adjustment bolt 26e. This allows the pressing piece 24f and the claw-shaped portion 24g of the coaster plate 24c to be displaced in the front-to-rear direction.

[0044] As shown in Figure 10, the mating coaster 22a is attached to the end of the long material support frame 14 on the front F side. In the attached state, on the front F side, the pinion gear 23d meshes with the rack gear 21a, and the tire 23f presses against the outer surface of the rack gear 21a. On the rear R side, the hook portion 23g engages with the guide rail 21b. Furthermore, the drive roller 23e abuts against the inner peripheral surface of the long material support frame 14, for example, against the inner edges of the many plate materials that make up the framework 14a. In this state, when the hydraulic motor 23b is driven to rotate, the pinion gear 23d and the drive roller 23e rotate, and the fitting coaster 22a can move in a circular motion along the moving guide 21 by itself.

[0045] In this embodiment, as shown in FIGS. 4 and 19(a) and 19(b), the rack gear 21a is generally rectangular and has rounded corners 21d at its four corners. Furthermore, the clamping portion 23i has a plurality of tires 23f spaced apart from the pinion gear 23d in the front and rear directions. Therefore, when the relative positioning (triangle T shown in FIG. 19(a)) between the plurality of tires 23f and the pinion gear 23d is kept constant, the pinion gear 23d is more likely to separate from the rack gear 21a and lose meshing engagement when passing through the rounded corners 21d than when passing through a generally straight portion. However, in this embodiment, the thickness of the rack gear 21a from the tooth tip to the back surface is greater in the curved portion than in the generally straight portion. This makes it difficult for the pinion gear 23d to separate from the rack gear 21a, and the pinion gear 23d can stably maintain meshing engagement even at the rounded corners 21d.

[0046] Furthermore, as shown in Figures 1 and 14, the engaging coaster 22a moves in a circular motion while the long material 12 is supplied sequentially, so that the long material 12 can be wound spirally sequentially around the outer peripheral surface 14c of the long material support frame 14.

[0047] Furthermore, as shown in Figure 10, when a newly supplied long material 12 is wound in a position adjacent to an already wound long material 12, adjacent long materials 12 are connected by pressing between the pressing piece 24f of the coaster plate 24c and the inner roller 24b. Here, the convex strip 12e on the side edge of one long material 12 is fitted into the concave groove 12d on the side edge of the other long material 12, and the locking piece 12f on one side edge is locked into the receiving part 12g on the other side edge. Furthermore, one side edge and the other side edge of the long material 12 may be joined by pressure using a bonding material.

[0048] [Guide Coaster] Fig. 11 is an exploded perspective view of the guide coaster 22b without the coaster plate, Fig. 12 is a schematic partial cross-sectional view of the guide box 25b of the guide coaster 22b, where (a) shows a partial cross-section in the direction of insertion of the long material and (b) shows a partial cross-section in the perpendicular direction, and Fig. 13 is a partial cross-sectional view showing the guide coaster 22b attached to the long material support frame 14. Like the fitting coaster 22a, the guide coaster 22b has a drive unit 23 for self-propelling the moving guide 21, and a function unit 25 connected to the drive unit 23 to perform the function of the guide coaster 22b.

[0049] The drive unit 23 has the same structure as that of the mating coaster 22a and is shared. The functional unit 25 has a guide base 25a and a guide box 25b attached to the guide base 25a so as to be able to swing freely. As shown in Figure 12, the guide box 25b is a hollow frame body with openings 25c on both ends perpendicular to the axial direction of the tubular culvert 11. The interior of the guide box 25b and the openings 25c are provided to allow the elongated material 12 to pass through the guide box 25b. The guide box 25b is supported so as to be able to swing freely around a swing axis that is aligned with the axis of the tubular culvert 11.

[0050] Inside the guide box 25b, there are provided rotatable inner guide rollers 25d and outer guide rollers 25e, which are arranged on the inside and outside of the passing long material 12. The inner guide rollers 25d and outer guide rollers 25e sandwich and guide the long material 12 passing through the guide box 25b. The outer guide roller 25e is formed so that it can be inserted between the multiple protrusions 12c on the outer surface 12b of the long material 12.

[0051] Similar to the functional part 24 of the fitting coaster 22a, the functional part 25 is connected to the driving part 23 by connecting a connecting part 24e, which is provided at the end of the guide base 25a on the rear R side and is common to the functional part 24, to a connected part 23h provided at the end of the drive base 23a on the front F side. In this embodiment, the functional part 25 is connected to the driving part 23 by fitting and fixing a connecting protrusion of the connecting part 24e into a connecting hole provided in the connected part 23h.

[0052] As shown in Figure 13, this guide coaster 22b is attached to the end of the long material support frame 14 on the front F side. When attached, the pinion gear 23d meshes with the rack gear 21a on the front F side, and the tire 23f presses against the outer surface of the rack gear 21a. On the rear R side, the hook portion 23g engages with the guide rail 21b. Furthermore, the drive roller 23e abuts against the inner circumferential surface of the long material support frame 14, for example, against the inner edges of the many plate materials that make up the framework 14a.

[0053] In this state, when the hydraulic motor 23b is driven to rotate, the pinion gear 23d and the drive roller 23e rotate, and the guide coaster 22b can move in a circular motion along the moving guide 21. The guide coaster 22b moves in front of the fitting coaster 22a in the moving direction, maintaining a predetermined distance. At this time, by rotating the hydraulic motor 23b at the same speed as the fitting coaster 22a, the guide coaster 22b moves in a circular motion around the long material support frame 14 at the same speed as the fitting coaster 22a.

[0054] 1 and 14, as the guide coaster 22b moves in a circular motion and the long materials 12 are sequentially supplied, the long materials 12 pass through the guide box 25b while being supported by the outer guide roller 25e and the inner guide roller 25d. Therefore, as the long materials 12 are sequentially supplied and sent out from the guide coaster 22b, the long materials 12 are always aligned in the direction of the opening 25c of the guide box 25b, i.e., perpendicular to the axial direction of the sewer 11. Therefore, the guide coaster 22b can always supply the sequentially supplied long materials 12 to the fitting coaster 22a in the same direction.

[0055] The supply angle of the long material 12 supplied relative to the guide coaster 22b varies depending on the position at which the guide coaster 22b travels on the long material support frame 14 and the orientation of the supplied long material 12. Therefore, the guide box 25b can freely swing relative to the guide base 25a to follow the variation in the supply angle, allowing the long materials 12 supplied sequentially to pass through and be sent out smoothly.

[0056] [Lifting device] Figure 15 is an oblique view of an example of a lift device, Figure 16 is a front view of the lift device, Figure 17 is a partial front view showing the state in which the long material support frame is supported by the lift device, and Figure 18 is a partial side view showing the state in which the long material support frame is supported by the lift device. The lifting device 16 is a device that supports and raises the long material support frame 14 and maintains the long material support frame 14 at a predetermined height. The lifting device 16 is placed on the bottom 11a of the culvert 11 and is configured to support the long material support frame 14 from the outside of the tubular body 13. In this embodiment, multiple lift devices 16 are used. The multiple lift devices 16 are arranged at intervals in the front-to-rear direction along the axial direction of the culvert 11 on both left and right sides of the long material support frame 14 in the width direction W.

[0057] Each lift device 16 has a base 16a placed on the culvert 11, a jack 16b supported by the base 16a, and an arm 16c that can be raised and lowered by the jack 16b and supports the long material support frame 14. The base 16a may be any type that can be stably placed on the bottom 11a near the wall that extends continuously upward from the bottom 11a side of the culvert 11. The base 16a is preferably arranged without being fixed to the bottom 11a of the culvert 11, and can be easily moved by workers.

[0058] The jack 16b is capable of raising and lowering the entire load of the long material support frame 14 with the coaster attached and the tubular body 13 constructed on the outer periphery of the long material support frame 14, and may be, for example, a hydraulic jack.

[0059] The arm 16c has a mounting portion 16d on which the outer periphery of the long material support frame and the tubular body 13 can be placed from below, and is supported by a jack 16b so that it can be raised and lowered. The arm 16c may be guided in its raising and lowering by a guide portion 16e that protrudes upward from the base portion 16a, for example.

[0060] 16 and 18, the multiple lift devices 16 support from below with arms 16c the positions of the outer peripheral surfaces 14c and extension surfaces 14d provided on both sides of the long material support frame 14 in the width direction W. At this time, each arm 16c can support and lift the tubular body 13 in the middle of construction arranged around the outer periphery of the long material support frame 14 from below and outside the tubular body 13 in the middle of construction while it is placed on the placement portion 16d.

[0061] The lift device 16 raises the long material support frame 14 to a predetermined height within the culvert 11 and holds it at that height. Specifically, the lift device 16 raises and holds the long material support frame 14 to a height that allows at least the mating coasters 22a and guide coasters 22b attached to the moving guides 21 of the long material support frame 14 to pass through the culvert 11 without abutting on the bottom of the culvert 11. For example, the annular long material support frame 14 may be held so that its central axis is aligned with the axis of the culvert 11.

[0062] When the long material support frame 14 is supported and raised from the outside of the tubular body 13 by the lifting devices 16, the long material support frame 14 can slide and move in the axial direction of the duct 11 within the tubular body 13. Therefore, by sequentially winding and connecting the long materials 12 around the tip of the tubular body 13, as the construction of the tubular body 13 progresses, the long material support frame 14 can slide along the inner surface of the tubular body 13 and move forward while remaining raised together with the tubular body 13 by the multiple lifting devices 16.

[0063] The long material support frame 14 is moved forward by continuously sliding on the inner peripheral surface of the tubular body 13 within a range where its outer peripheral surface 14c and extension surface 14d do not come off the lifting device 16. Furthermore, in this embodiment, since multiple lifting devices 16 are arranged spaced apart in the front-to-rear direction, the front and rear lifting devices 16 can be moved forward alternately and re-installed, thereby repeatedly moving the long material support frame 14 forward while it remains in the raised state.

[0064] Furthermore, when the long material support frame 14 is supported from the outside of the tubular body 13 by the lift device 16, the downward outer peripheral surface 14c and extension surface 14d of the long material support frame 14 are inclined toward the center of the tubular culvert 11, so the long material support frame 14 can slide toward the center due to its own weight on the inner peripheral surface of the tubular body 13. Therefore, the construction of the tubular body 13 can be carried out while maintaining the long material support frame 14 in a position toward the center of the tubular culvert 11.

[0065] [Method of constructing tubular body] Next, a method for constructing a tubular body 13 made of long materials 12 in an existing duct 11 using the pipe making machine 10 described above will be described. When constructing the tubular body 13 using the pipe making machine 10 of this embodiment, the construction can be carried out without stopping the water supply, while allowing water to continue flowing in the culvert 11 as usual.

[0066] To construct the tubular body 13, first the pipe making machine 10 is carried in from the ground and installed inside the culvert 11. At that time, the long material support frame 14 can be carried into the culvert 11 in a state where it is divided into multiple segments 14f, 14g, and assembled inside the culvert 11. The mating coasters 22a and guide coasters 22b can also be carried in and attached to the moving guides of the long material support frame 14 inside the culvert.

[0067] Next, the lifting device 16 is used to lift and support the long material support frame within the culvert 11. The lifting device 16 is positioned rearward of the position where the mating coaster 22a passes at the end of the front F side of the long material support frame 14. The lifting device 16 is placed on the bottom 11a of the culvert 11, on both sides in the width direction W of the bottom of the long material support frame 14, at a position corresponding to the area where the outer peripheral surface 14c and extension surface 14d are provided. The long material support frame 14 is placed on the placing portion 16d of the arm 16c and raised to a predetermined height.

[0068] In this way, the pipe making machine 10 can be installed inside the culvert 11. Even in this state, water continues to flow inside the culvert 11, so the pipe making machine 10 is constantly subjected to water pressure from the flowing water. However, in the pipe making machine 10 of this embodiment, the thickness of the long material support frame 14, i.e., the thickness in the direction perpendicular to the axis of the culvert 11, is made as thin as possible. This reduces the force that the pipe making machine 10 receives from the flowing water, and the installation position can be maintained stably without being swept away inside the culvert 11.

[0069] After the pipe making machine 10 is installed, the long material 12 is pulled into the pipe culvert 11 from a drum placed on the ground and wrapped around the outer surface of the long material support frame 14 several times, and the long materials 12 are connected to each other to begin the construction of the tubular body 13 around the long material support frame 14.

[0070] The winding and connection of the long material 12 is performed by driving the engaging coaster 22a and the guide coaster 22b. The engaging coaster 22a and the guide coaster 22b are attached to the moving guide 21 of the long material support frame 14 at a predetermined interval and driven so that the guide coaster 22b is in the front and the engaging coaster 22a is in the rear. Then, the guide coaster 22b moves along the moving guide 21, regulating the orientation of the long material 12 supplied from the drum on the ground, and sends it out to the fitting coaster 22a. As a result, the long material 12 is always supplied to the fitting coaster 22a in a state where the orientation is constant.

[0071] As the mating coaster 22a moves along the moving guide 21, it arranges the long material 12 from the guide coaster 22b by spirally winding it around the outer peripheral surface of the long material support frame 14, and connects adjacent long materials 12 together.

[0072] After constructing the front end side of the tubular body 13 in this way, multiple lifting devices 16 are installed inside the culvert 11 so as to support the outer periphery of the tubular body 13. The multiple lifting devices 16 are arranged spaced apart in the front and rear at positions corresponding to the outer periphery surface 14c and extension surface 14d of the long material support frame 14. Each lifting device 16 places the outer periphery of the tubular body 13 on the placing portion 16d of the arm 16c, and supports the long material support frame 14 at a predetermined height.

[0073] In this state, when the fitting coaster 22a and the guide coaster 22b are driven, the long materials 12 are arranged in a spiral and adjacent long materials 12 are connected to each other, thereby proceeding with the construction of the tubular body 13. As the tubular body 13 is constructed, newly supplied long materials 12 are sequentially wound in a spiral in front of the front end of the tubular body 13 and arranged, and are sequentially connected to the long materials 12 at the front end of the tubular body 13.

[0074] At this time, the pressing pieces 24f of each coaster 22 can use the spaces between the protrusions 12c of the long material 12 that has already been wound and the shape of the plastically deformable material 12Y as rails. This allows each coaster 22 to convert the increment of the helical axis of the long material 12 that is sequentially arranged in a spiral shape into the axial direction of the pipe 11 and transmit it to the long material support frame 14. Then, because the multiple lift devices 16 support the long material support frame 14 from the outside of the tubular body 13, the long material support frame 14 can slide forward on the inner surface of the tubular body 13. In this embodiment, each lifting device 16 is disposed at a position corresponding to the outer peripheral surface 14c and the extension surface 14d on both sides of the long material support frame 14. Therefore, while each lifting device 16 is disposed at a position corresponding to the outer peripheral surface 14c and the extension surface 14d, the construction of the tubular body 13 from the long material 12 can be carried out continuously.

[0075] As the construction of the tubular body 13 continues, the long material support frame 14 moves forward F, and some of the multiple lifting devices 16 are no longer positioned to correspond to the long material support frame 14. In this case, since the multiple lifting devices 16 are arranged at intervals in the front and back, they can be repositioned alternately to the front F. This allows the winding and connecting process of the long material 12 to be carried out continuously while the long material support frame 14 is always kept elevated to a predetermined height.

[0076] After the tubular bodies 13 have been constructed continuously for the required distance within the culvert 11, the operation of the pipe making machine 10 is stopped. Then, a backfill material such as mortar that is difficult to flow is injected between the outer periphery of the tubular bodies 13 and the inner periphery of the culvert 11 and allowed to harden, thereby completing the construction of a composite pipe in which the tubular bodies 13 of the long material 12, the existing culvert 11, and the backfill material are integrated. The pipe making machine 10 can be disassembled into each part, and the long material support frame 14 can be disassembled into multiple segments 14f, 14g, which can then be carried out onto the ground, completing the work.

[0077] [Action and effect] According to the pipe making machine 10 of the above embodiment, an annular moving guide 21 is fixed to the end of the annular long material support frame 14. The coaster 22, which connects the long material 12 by wrapping it around the outer periphery of the long material support frame 14, can move freely along the moving guide 21. This simplifies the structure attached to the long material support frame 14 to move the coaster 22, and eliminates the need to provide a moving part on the long material support frame 14 as in the conventional case. This makes it possible to simplify the structure of the pipe making machine 10. As a result, it is possible to reduce the weight of the long material support frame 14, for example. Furthermore, by simplifying the structure of the long material support frame 14 and making it lighter, it can be made into a split structure and made smaller, making it easier to carry the pipe making machine 10 into the sewer 11. Furthermore, because there is no need to provide a movement mechanism on the periphery of the long material support frame 14, the thickness of the long material support frame 14 can be made thinner, and the force it receives from flowing water in the sewer 11 can be reduced.

[0078] In the pipe making machine 10 of this embodiment, the moving guide 21 is installed inside the outer periphery of the end of the long material support frame 14 and has a rack gear 21a shaped to fit along the inner circumferential surface of the pipe 11. The coaster 22 has a pinion gear 23d that engages with the rack gear 21a and is driven to rotate. Therefore, the coaster 22 can easily move along the inner surface of the pipe 11 by itself, following the rack gear 21a. This simplifies the drive structure of the coaster 22 for placing the long material 12 along the inner circumferential surface.

[0079] In this case, in the pipe making machine 10 of this embodiment, the moving guide 21 has a guide rail 21b that supports the coaster 22 inside the long material support frame 14. Therefore, the orientation of the coaster 22 can be stabilized without providing any special additional structure that protrudes from the outer periphery of the long material support frame 14, and newly supplied long material 12 can be easily connected to the wound long material 12. Furthermore, in each coaster 22 of this embodiment, multiple pinion gears 23d are engaged with and driven by the rack gear 21a, so that each coaster 22 is prevented from tilting forward or backward relative to the circumferential direction along the rack gear 21a, and can move while remaining arranged parallel to each other.

[0080] In the pipe making machine 10 of this embodiment, at least the end of the long material support frame 14 is provided with an annular outer surface 14c around which the long material 12 is wound, which is the outermost surface of the long material support frame 14. Therefore, the long material support frame 14 can be easily moved in the axial direction of the tubular culvert 11 inside the tubular body 13 that is formed sequentially by spirally winding the long material 12 around it.

[0081] In the pipe making machine 10 of this embodiment, the fitting coaster 22a, which winds the long materials 12 around the long material support frame 14 and fits adjacent long materials 12 together, and the guide coaster 22b, which supplies the introduced long materials 12 to the fitting coaster 22a in the same direction, travel on the same moving guide 21. Therefore, a structure in which the guide coaster 22b follows the fitting coaster 22a can be simply constructed. Therefore, a structure in which the continuously introduced long materials 12 are supplied to the fitting coaster 22a in an orientation that makes fitting easy can be easily constructed.

[0082] According to the pipe making machine 10 of this embodiment, the fitting coaster 22a and the guide coaster 22b share the drive unit 23 for self-propelling the same moving guide 21, and each has functional units 24, 25 that are connected to the drive unit 23 and perform different functions. Therefore, it is easy to produce multiple coasters 22 with different functions. Furthermore, by sharing the drive unit 23, it is easy to add coasters 22 with other functions.

[0083] In this embodiment of the pipe making machine 10, the long material support frame 14 and the moving guide 21 can be constructed from multiple segments 14f, 14g. In this case, each of the multiple segments 14f, 14g integrally has a partial long material support frame 14h and a partial moving guide 21i. By connecting the multiple segments 14f, 14g circumferentially, the long material support frame 14 and the moving guide 21 can be formed into an annular shape. Therefore, when the pipe making machine 10 is transported into or out of the tubular culvert 11, the long material support frame 14 and the moving guide 21 can be divided into segments 14f and 14g, respectively, for transporting in and out. According to this embodiment, the moving guide 21 can be installed together with the long material support frame 14 simply by connecting the segments 14f and 14g inside the tubular culvert 11, thereby improving workability during transporting in and out.

[0084] According to the pipe making machine 10 of this embodiment, the long material support frame 14 has an outer peripheral surface 14c formed in a shape corresponding to the inner peripheral surface of the tubular body 13, around which the long material 12 is wound, and this outer peripheral surface 14c is formed flat in the axial direction of the tubular culvert 11. Therefore, the long material support frame 14 can be slid and moved inside the tubular body 13 in the axial direction of the tubular culvert 11.

[0085] Furthermore, the lifting device 16 supports, raises, and holds the outer peripheral surface 14c of the long material support frame 14 from the outside of the tubular body 13 formed by winding the long material 12 around it. Therefore, the lifting device 16 can raise the long material support frame 14 to a position corresponding to the outer peripheral surface 14c. Therefore, the lifting device 16 can easily move the long material support frame 14 in the axial direction of the tubular 11 while winding the long material 12 around it, while supporting the long material support frame 14 together with the tubular body 13 in a raised position from the bottom 11a of the tubular 11.

[0086] As a result, in this embodiment of the pipe making machine 10, when the winding device 15 is used to wind the long material 12 sequentially around the long material support frame 14 to proceed with the construction of the tubular body 13, there is no need to repeatedly lift the pipe making machine 10 together with the tubular body each time, which also improves the safety of the tubular body construction work.

[0087] The pipe making machine 10 of this embodiment has a plurality of lift devices 16 that are placed on the bottom 11a of the tubular culvert 11 and support the long material support frame 14 and tubular body 13 from below, and the plurality of lift devices 16 are arranged at intervals in the axial direction of the tubular culvert 11. Therefore, while one lift device 16 is supporting the long material support frame 14, the other lift device 16 can be repositioned, and the plurality of lift devices 16 can be moved forward in sequence, alternately. Therefore, the long material support frame 14 can be moved forward while always being lifted upward from the bottom 11a of the tubular culvert 11.

[0088] In the pipe making machine 10 of this embodiment, the long material support frame 14 has an extension surface 14d that extends flatly from the outer peripheral surface 14c in the axial direction of the culvert 11, and the lifting device 16 can support the long material support frame 14 and the tubular body 13 from the outer peripheral surface 14c and the lower side of the extension surface. Therefore, when supporting the long material support frame 14, it can support not only the area of ​​the outer peripheral surface 14c, but also a long continuous area from the outer peripheral surface 14c to the extension surface 14d. Therefore, in this embodiment, the long material support frame 14 can be moved a longer distance while being supported by the lifting device 16, and the winding operation of the long material 12 can be continued for a longer period of time, improving workability.

[0089] In the lift device 16 of this embodiment, the downward surfaces on both the left and right sides of the outer peripheral surface 14c of the long material support frame 14 are each inclined downward toward the center of the pipe 11. Therefore, when the downward surfaces on both the left and right sides are raised from below the tubular body 13 by the lift device 16, a force toward the center of the pipe 11 acts on the long material support frame 14 due to its own weight. This makes it possible to automatically align the long material support frame 14 with the axis of the pipe 11, and it is also possible, for example, to automatically align the center of the long material support frame 14, which is the center of the tubular body 13, with the center of the pipe 11.

[0090] The above embodiment can be modified as appropriate within the scope of the present invention. For example, in the above embodiment, an example was described in which the cross-sectional shape of the inner peripheral surface of the pipe culvert 11 is approximately rectangular and the outer peripheral shape of the long material support frame 14 of the pipe making machine 10 is approximately rectangular, but the shape of the pipe culvert 11 is not limited in any way. Therefore, the outer peripheral shape of the long material support frame 14 of the pipe making machine 10 can be various shapes corresponding to the cross-sectional shape of the inner peripheral surface of various types of pipe culverts 11. In addition, in the above embodiment, the elongated material 12 is exemplified as having the cross-sectional shape shown in Figures 3(a) and (b), but the shape of the elongated material 12 is not limited in any way, and materials with various cross-sectional shapes can be used.

[0091] Furthermore, in the above embodiment, an example has been described in which one fitting coaster 22a and one guide coaster 22b are attached to the moving guide 21 as the coasters 22, but the number of coasters 22 is not particularly limited. For example, in various cases, such as when the conduit 11 is large, multiple interlocking coasters 22a may be installed as needed. In this case, multiple interlocking coasters 22a can be installed on the same moving guide 21. In this way, when the long materials 12 are arranged in a spiral, the long materials 12 can be more reliably connected to each other. In addition to the case where multiple coasters 22 with the same function are attached, coasters 22 with other functions can also be attached. In this case, the same drive unit 23 as above can be used in common, and each coaster 22 can be configured by connecting various functional units to the drive unit 23. [Explanation of symbols]

[0092] 10 Pipe making machine 11 Pipe culvert 11a bottom 12 Long timber, 12X Strips, 12Y plastic deformation material, 12a medial surface; 12b lateral surface; 12c protrusion, 12d groove, 12e ridges, 12f locking piece, 12g receiving part, 13 Tubular body 14 Long material support frame 14a Skeleton 14b Surface plate 14c Outer surface 14d extension surface 14e, 14j Ball carrier 14f, 14g divided body 14h Partial long material support frame 14i Partial Movement Guide 15 Wrapping device 16 Lifting device 16a Base 16b Jack 16c arm 16d Placement section 16e Information Department 21 Travel Guide 21a rack gear 21b guide rail 21c Rail protrusion 21d Corner R section 22 Coaster 22a Mating Coaster 22b Guide Coaster 23 Drive unit 23a driving base, 23b hydraulic motor, 23c Transmission section, 23d pinion gear, 23e drive roller; 23f tires, 23g hook part, 23h Connected part, 23i Clamping part 23j spring 24,25 Functional section 24a Mating base 24b Inner roller 24c Coaster Plate 24d Plate adjustment part 24e Connection part 24f pressing piece 24g Claw-shaped part 25a guide base 25b guide box 25c aperture 25d Inner guide roller 25e Outer guide roller 26 Plate adjustment part 26a Adjustment Base 26b Cardinal branch 26c Pressure adjustment piece 26c 26d Tilt adjustment bolt 26e Front and rear position adjustment bolt

Claims

1. A pipe making machine that arranges long materials in a spiral shape inside a pipe and connects adjacent long materials to construct a tubular body, an annular long material support frame that is movably disposed within the culvert and that winds the successively unwound long materials around and connects the long materials together; a winding device that winds the long material around the outer periphery of the long material support frame, The winding device is an annular moving guide fixed to an end of the elongated member support frame so as to fit along the inner peripheral surface of the culvert; a coaster that moves along the moving guide and sequentially wraps continuous long materials around the outer periphery of the long material support frame while connecting the long materials together.

2. A pipe making machine as described in claim 1, wherein the moving guide has a rack gear installed inside the outer periphery of the end of the long material support frame and shaped to fit along the inner surface of the pipe, and the coaster has a pinion gear that engages with the rack gear and is driven to rotate.

3. 3. The pipe making machine according to claim 2, wherein the moving guide has a guide rail that supports the coaster inside the long material support frame.

4. 2. A pipe making machine as described in claim 1, wherein at least one end of the long material support frame is provided with an annular outer surface around which the long material is wound, the outermost surface being the long material support frame.

5. The pipe making machine described in claim 1, wherein the coaster includes an engaging coaster for winding the long material around the long material support frame while engaging adjacent long materials, and a guide coaster for supplying the introduced long material to the engaging coaster in an aligning direction, and the engaging coaster and the guide coaster self-propel on the same moving guide.

6. A pipe making machine as described in claim 1, which has multiple coasters, and the multiple coasters have a common drive unit for self-propelling the same moving guide, and each have a functional unit connected to the drive unit to perform different functions.

7. A pipe making machine as described in claim 1, wherein the long material support frame and the moving guide are composed of multiple divided bodies, each of which has a partial long material support frame and a partial moving guide integrally therewith, and the multiple divided bodies are connected circumferentially so that the long material support frame and moving guide are formed in a ring shape.

8. 3. A pipe making machine as described in claim 2, wherein the rack gear has gear teeth protruding inward, the rack gear has a straight portion and a curved portion, and the curved portion is formed thicker than the straight portion.

9. 9. The pipe making machine according to claim 8, wherein the thickness of the rack gear gradually changes between the linear portion and the curved portion, and the thickness changes so as to become larger as the radius of curvature of the curved portion becomes smaller.

10. A pipe making machine as described in claim 8, wherein the rack gear has gear teeth protruding inward, the coaster has a clamping portion that clamps the rack gear between it and the pinion gear, and the clamping portion is elastically displaceable between it and the pinion gear by a spring.

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