Profile removal method in pipe making process and self-propelled pipe making machine

Abstract

To provide a profile fitting removing method and a self-propelled pipe making machine that avoid damage to a fitting part when unraveling the profile from a top of a spiral pipe in the middle of pipe making when the spiral pipe is made by the self-propelled pipe making machine.SOLUTION: In a process of making a spiral pipe 5 by a self-propelled pipe making machine 1, a profile at a beginning of the spiral pipe and a subsequent profile fed from a drive part 10 are restrained by a fitting roller 35 and a fitting guide 45 at a predetermined fitting position, and a first fitting part of the profile at the beginning of the spiral pipe and a second fitting part of the subsequent profile are fitted. In the middle of the pipe making process, the profiles are pulled into the drive part by driving the drive part in an opposite direction, and when the second fitting part of the subsequent profile is removed from the first fitting part of the profile at the beginning of the spiral pipe, the restraint on the profile is loosened by moving back the fitting roller inward in a pipe radial direction or moving back the fitting guide outward in a radial direction.SELECTED DRAWING: Figure 3B

Description

[Technical Field]

[0001] The present invention relates to a method for disengaging a profile during a process of producing a spiral pipe from a strip-shaped profile using a self-propelled pipe making machine, and to a self-propelled pipe making machine suitable for this method. [Background technology]

[0002] A technology for producing a helical pipe using a self-propelled pipe making machine from a strip-shaped profile having a first fitting portion on one side in the width direction and a second fitting portion complementary to the first fitting portion on the other side is known. The self-propelled pipe making machine has a drive unit that feeds out the profile as a basic component. The drive unit feeds the subsequent profile obliquely toward the profile located at the front of the helical pipe being produced, causing the second fitting portion of the subsequent profile to fit into the first fitting portion of the front profile. The self-propelled pipe making machine moves in a spiral using the reaction force generated by the feeding of the profile.

[0003] Patent Document 1 discloses an inner peripheral holding tool and an outer peripheral holding tool as restraining means for assisting the fitting of profiles during pipe production. At a predetermined fitting position away from the drive unit in the profile feed direction, these holding tools press the leading profile and the trailing profile of the helical pipe from the inside and outside in the pipe diameter direction, while fitting the first fitting portion and the second fitting portion together. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-49723 Summary of the Invention [Problem to be solved by the invention]

[0005] During the process of producing helical pipe using a self-propelled pipe making machine, situations may arise where the machine hits a step or is unable to continue producing the pipe. In such cases, it is necessary to unwind the profile from the beginning of the helical pipe during production and temporarily move the beginning of the helical pipe back. To do this, the drive unit is rotated in reverse, pulling the subsequent profile back from the beginning of the helical pipe toward the drive unit, and this pulling force disengages the first and second mating portions. However, if the first and second mating portions are uncoupled while the clamping tool is still restraining the leading profile and the trailing profile in the predetermined mating position, as in pipe production, a large load is applied to the first and second mating portions, which may cause damage. If the pipe making process is resumed using a profile with a damaged mating portion, a misfit will occur in the helical pipe. [Means for solving the problem]

[0006] The present invention has been made to solve the above-mentioned problems, and provides a method for removing a profile from a pipe making process, comprising the steps of: providing a strip-shaped profile having a first fitting portion on one side in the width direction and a second fitting portion on the other side that is complementary in shape to the first fitting portion; and providing a self-propelled pipe making machine for producing the profile into a helical pipe, the self-propelled pipe making machine comprising: a drive unit that feeds out the profile; and restraining means that is arranged away from the drive unit in the profile feeding direction; In the pipe manufacturing process, The first engaging portion and the second engaging portion are engaged with each other while at least one of the profile located at the front of the spiral pipe during pipe making and the subsequent profile sent out from the drive unit is restrained at a predetermined engaging position by the restraining means, and the device is self-propelled by utilizing the reaction force associated with the sending out of the profile.During the pipe making process, the drive unit is driven in the direction opposite to the sending out direction of the profile, thereby pulling the subsequent profile into the drive unit, and when the second engaging portion of the subsequent profile is removed from the first engaging portion of the profile at the front of the spiral pipe, the restraint on the profile by the restraining means is loosened or released.

[0007] According to the above-described method, when the profile is unwound from the front end of the helical pipe by loosening or releasing the restraining means, the unwound position can be moved farther from the drive unit than the fitting position during pipe manufacturing, thereby reducing the load on the fitting portion and preventing damage to the fitting portion.

[0008] In one embodiment of the method of the present invention, the self-propelled pipe making machine has a body of the drive unit. or at the tip of an inner frame extending from the drive unit in the feeding direction. The device further comprises an inner support frame that is rotatably supported and an adjustment mechanism that adjusts the angle of the inner support frame, and an inner clamp that serves as the restraint means is supported on the inner support frame, and during pipe manufacturing, the inner clamp holds the subsequent profile from the inside in the pipe diameter direction at the predetermined fitting position, and during the fitting and unfitting, the inner support frame is rotated by the adjustment mechanism, thereby causing the inner clamp to retreat further inward in the pipe diameter direction than its position during pipe manufacturing.

[0009] In the above specific example, preferably, the inner support frame is rotatably connected to a tip end portion of the inner frame extending from the drive unit, The adjustment mechanism is provided between the inner frame and the inner support frame.

[0010] In another specific example of the method of the present invention, the self-propelled pipe making machine further includes an inner support frame removably supported on the body of the drive unit, and an inner clamp as the restraint means is supported on the inner support frame, and during pipe making, the inner clamp holds the subsequent profile from the inside in the pipe diameter direction at the predetermined fitting position, and when the fitting is removed, the inner support frame supporting the inner clamp is removed from the body.

[0011] In yet another specific example of the method of the present invention, the self-propelled pipe making machine further comprises an outer support frame rotatably connected to the body of the drive unit and extending in the feed direction, and an adjustment mechanism for adjusting the angle of the outer support frame, and an outer presser is provided at the tip of the outer support frame as the restraint means, and during pipe making, the outer presser presses the profile at the head of the spiral pipe from the outside in the pipe diameter direction at the predetermined fitting position, and during the fitting and unfitting, the outer support frame is rotated by the adjustment mechanism, The outer presser is moved back radially outward from the position at the time of pipe manufacturing.

[0012] In the above specific example, preferably, the first fitting portion is a female fitting portion that projects outward in the pipe radial direction, and the outer presser has a support groove that holds the female fitting portion.

[0013] In the above specific example, preferably, the self-propelled pipe making machine further comprises an inner frame that is rotatably connected to the body of the drive unit, extends in the feed direction, and is positioned radially inward of the outer support frame, and a passage formed between the outer support frame and the inner frame through which the profile fed from the drive unit passes during pipe making, and the adjustment mechanism is provided between the outer support frame and the inner frame, and during the fitting and unfitting, the adjustment mechanism rotates the outer support frame and the inner frame to widen the passage compared to during pipe making.

[0014] Another aspect of the present invention is a self-propelled pipe making machine for producing a band-shaped profile into a helical pipe, the band-shaped profile having a first fitting portion on one side in the width direction and a second fitting portion on the other side that is complementary in shape to the first fitting portion, the machine comprising: a drive unit that feeds out the profile during pipe making; an inner frame connected to the body of the drive unit and extending in the feed direction; an inner support frame rotatably connected to the inner frame; an inner pressing device supported by the inner support frame that holds the subsequent profile from the inside in the radial direction of the helical pipe at a predetermined mating position when mating the second fitting portion of the subsequent profile with the first fitting portion of the leading profile of the helical pipe during pipe making; and an adjustment mechanism provided between the inner frame and the inner support frame that adjusts the angle of the inner support frame.

[0015] Yet another aspect of the present invention is a self-propelled pipe making machine for producing a band-shaped profile into a helical pipe, the band-shaped profile having a first fitting portion on one side in the width direction and a second fitting portion on the other side that is complementary in shape to the first fitting portion, the machine comprising: a drive unit that feeds out the profile during pipe making; an outer support frame that is rotatably connected to the body of the drive unit and extends in the feed direction; an outer pressing device that is provided at the tip of the outer support frame and that presses the leading profile from the outside in the pipe diameter direction of the helical pipe at a predetermined mating position when mating the second fitting portion of a subsequent profile with the first fitting portion of the leading profile of the helical pipe during pipe making; an inner frame that is rotatably connected to the body of the drive unit and extends in the feed direction and is positioned radially inward of the outer support frame; a passage formed between the outer support frame and the inner frame through which the profile fed from the drive unit passes during pipe making; and an adjustment mechanism that is provided between the outer support frame and the inner frame and that adjusts the width of the passage. [Effects of the Invention]

[0016] According to the present invention, damage to the fitting portion of the profile can be avoided when unwinding the profile from the front end of a spiral pipe during pipe manufacturing. [Brief explanation of the drawings]

[0017] [Figure 1A] This is a cross-sectional view showing the profile of the leading edge of a rehabilitating pipe just before the fitting position and the subsequent profile during the pipe manufacturing process of a rehabilitating pipe inside an existing pipe. [Figure 1B] This is a cross-sectional view showing the profile of the leading edge of the rehabilitating pipe and the subsequent profile at the fitting position during the pipe manufacturing process of the same rehabilitating pipe. [Figure 2A] This is a schematic vertical cross-sectional view showing the state in which the self-propelled pipe making machine hits a step in the existing pipe during the pipe making process for the same rehabilitation pipe. [Figure 2B] This is a schematic vertical cross-sectional view showing the state in which the front end of the rehabilitating pipe is retracted from the abutted position by unwinding the profile from the front end of the rehabilitating pipe during the pipe manufacturing process of the same rehabilitating pipe. [Figure 3A] This is a side view showing the state in which a profile is being fitted using a self-propelled pipe making machine according to one embodiment of the present invention in the pipe making process of the same rehabilitation pipe. [Figure 3B] 10 is a side view showing a state in which one aspect of the profile fitting and unfitting method of the present invention is being performed using the self-propelled pipe making machine. FIG. [Figure 4A] 3B is an explanatory diagram showing the magnitude of the force required for disengagement when disengagement is performed while the profile is restrained by the restraining means in the same manner as during pipe manufacturing, i.e., as in FIG. 3A. FIG. [Figure 4B] 3C is an explanatory diagram showing the magnitude of the mating / unmating force when mating / unmating is performed in the state shown in FIG. 3B. FIG. [Figure 5] 3B and 3C are views showing another embodiment of the profile fitting / disengaging method of the present invention. [Figure 6] 3C is a side view showing the state when the self-propelled pipe making machine is positioned on the side of the existing pipe in the fitting and unfitting method shown in FIG. 3B. FIG. [Figure 7] 3B and 3C are views showing another embodiment of the profile fitting / disengaging method of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] <Profile configuration> First, a resin profile 100 used in manufacturing a spiral pipe will be described with reference to Figures 1A and 1B. As shown in Figure 1A, the profile 100 is strip-shaped and has a main strip plate portion 110 with one flat surface 111, a female fitting portion 120 (first fitting portion) formed on one widthwise side edge of the main strip plate portion 110, a male fitting portion 130 (second fitting portion) formed on the other side edge, and a reinforcing rib 140 formed on the other surface 112 of the main strip plate portion 110. In this embodiment, a metal reinforcing member 141 is embedded in the reinforcing rib 140.

[0019] As will be described later, when the profile 100 is spirally wound into a rehabilitated pipe (helical pipe) by a self-propelled pipe making machine, one surface 111 of the main band plate portion 110 is positioned on the inside of the rehabilitated pipe in the pipe diameter direction, and the other surface 112 is positioned on the outside of the rehabilitated pipe in the pipe diameter direction. The female fitting portion 120 protrudes outward in the pipe diameter direction of the rehabilitated pipe and has a fitting groove 121 with an arrow-shaped cross section that opens on the inside of the pipe diameter direction. The male fitting portion 130 also protrudes outward in the pipe diameter direction and has a cross section shape that is complementary to the fitting groove 121. As shown in FIG. 1B , the female fitting portion 120 and the male fitting portion 130 of the spirally wound profile 100 are fitted together.

[0020] <Configuration of the self-propelled pipe making machine> 3A, the self-propelled pipe making machine 1 used in this embodiment comprises a drive unit 10 that feeds out a profile 100 when making a rehabilitating pipe 5, an inner frame 20 whose base end is connected to a body 11 of the drive unit 10 and extends in the direction of feeding out the profile 100, an inner support frame 30 that is rotatably connected to the tip of the inner frame 20 (rotatable around a rotation axis extending in the pipe axis direction of the rehabilitating pipe 5), and an outer support frame 40 whose base end is connected to the body 11 of the drive unit 10 and extends in the direction of feeding out the profile 100. The inner frame 20 and the inner support frame 30 are positioned radially inward of the outer support frame 40.

[0021] The drive unit 10 has a body 11, a plurality of drive rollers 12 rotatably supported by the body 11 (rotatable around a rotation axis extending in the pipe axial direction), and a hydraulic motor (not shown) that drives the drive rollers 12 in forward and reverse rotation directions. With the profile 100 sandwiched between the drive rollers 12, the drive rollers 12 are rotated forward in the direction of the arrow in Figure 3A, thereby feeding out the profile 100.

[0022] A fitting roller 35 (inner presser; restraining means) is supported at the tip of the inner support frame 30 so as to be rotatable around a rotation axis extending in the pipe axis direction. An adjustment mechanism 50 is provided between the tip of the inner frame 20 and the inner support frame 30. This adjustment mechanism 50 adjusts the angle of the inner support frame 30 relative to the inner frame 20. The adjustment mechanism 50 in this embodiment has a screw 51, a threading member 52 that is rotatably supported at the tip of the inner frame 20 and threadably engages with the screw 51, and a holding member 53 that is rotatably supported at the tip of the inner support frame 30 and holds the tip of the screw 51. The holding member 53 allows the screw 51 to be turned.

[0023] A passage 60 is formed between the inner frame 20 and the outer support frame 30, through which the profile 100 delivered from the drive unit 10 passes. A fitting guide 45 (outer retainer; restraining means) is provided at the tip of the outer support frame 40. As shown in Fig. 1B, this fitting guide 45 has a support groove 45a for receiving and holding the female fitting portion 120.

[0024] The base ends of the inner frame 20 and the outer support frame 30 have play relative to the body 11 of the drive unit 10, and are allowed to rotate around a rotation axis extending in the pipe axial direction. An adjustment mechanism 70 is provided between the inner frame 20 and the outer support frame 40. The adjustment mechanism 70 in this embodiment has a screw 71, a threaded member 72 fixed to the inner frame 20 and threadably engaged with the screw 71, and a holding member 73 fixed to the outer support frame 40 and holding the tip of the screw 71. The holding member 73 allows the screw 71 to be turned.

[0025] <Outline of the pipe manufacturing process> In this embodiment, a rehabilitation pipe 5 (spiral pipe) is lined around the inner periphery of an existing pipe 6, such as an aged sewer pipe, to rehabilitate the existing pipe 6. The existing pipe 6 is arranged so as to connect a starting manhole located on the left side of Fig. 2A and a reaching manhole located on the right side (neither shown).

[0026] As shown in FIG. 2A, the rehabilitated pipe 5 is obtained by using a self-propelled pipe making machine 1 to produce a profile 100 in a spiral shape. More specifically, the profile 100 is supplied from a drum located above ground in the starting manhole, through the starting manhole, through the rehabilitated pipe 5 being produced, and to the self-propelled pipe making machine 1 located at the beginning of the rehabilitated pipe 5. The self-propelled pipe making machine 1 produces the rehabilitated pipe 5 by spirally winding the profile 100 and mating the female fitting portion 120 of the profile 100 located at the beginning of the rehabilitated pipe 5 with the male fitting portion 130 of the following profile 100 (one turn away). The self-propelled pipe making machine 1 continues to produce the pipe at the beginning of the rehabilitated pipe 5 while traveling in a spiral. The produced rehabilitated pipe 5 extends toward the destination manhole.

[0027] <Adjustment of the self-propelled pipe making machine in the pipe making process> During the pipe making process, the positions of the components are adjusted as shown in Fig. 3A by the adjustment mechanisms 50 and 70. This will be described in detail below.

[0028] The width of the passage 60 between the inner frame 20 and the outer support frame is adjusted by the adjustment mechanism 70, which allows the profile 100 from the drive unit 10 to be stably fed toward the fitting position P0 (see FIG. 3A). By adjusting this adjustment mechanism 70, as shown in FIG. 1B, the fitting guide 45 can hold the female fitting portion 120 of the profile 100 located at the front of the rehabilitated pipe 5 in the middle of pipe production in the support groove 45a at the fitting position P0, and can also press the profile 100 from the outside in the pipe diameter direction.

[0029] The adjustment mechanism 50 adjusts the angle of the inner support frame 30, so that at the mating position P0, the mating roller 35 can press the surface 111 of the main strip plate portion 110 of the subsequent profile 100 from the inside in the pipe diameter direction so that it is flush with the surface 111 of the profile 100 located at the beginning of the rehabilitated pipe 5 in the process of being manufactured (see Figure 1B).

[0030] <Function of the self-propelled pipe making machine in the pipe making process> As shown in FIG. 3A , the drive roller 12 is rotated forward to feed the profile 100 to the right. The fed subsequent profile 100 passes through the passage 60 toward the front end of the rehabilitating pipe 5, and at the fitting position P0, the male fitting portion 130 fits into the fitting groove 121 of the female fitting portion 120 of the profile 100 located at the front end of the rehabilitating pipe 5 during pipe production. At this time, the fitting roller 35 presses the subsequent profile 100 from the inside in the pipe diameter direction, and the fitting guide 45 presses the profile 100 located at the front end of the rehabilitating pipe 5 from the outside in the pipe diameter direction at the fitting position P0. This ensures that the female fitting portion 120 and the male fitting portion 130 fit together reliably at the fitting position P0. Furthermore, the female fitting portion 120 is housed and held in the support groove 45a of the fitting guide 45, further enhancing the smoothness of the fitting process.

[0031] The self-propelled pipe making machine 1 moves in a spiral (moves clockwise in Figure 3A) by utilizing the reaction force caused by the drive unit 10 feeding out the subsequent profile 100, thereby allowing the profile 100 to be supplied to the front of the rehabilitated pipe 5 in the middle of being made, while continuing to make the rehabilitated pipe 5.

[0032] <Suspension of pipe production and restart of pipe production> As shown in Figure 2A, if there is an obstacle such as a step 6a on the existing pipe 6, the self-propelled pipe making machine 1 will hit the step 6a, preventing it from moving further and making any more pipe. In this case, as shown in Figure 1B, a predetermined amount of profile 100 is unwound from the beginning of the rehabilitating pipe 5 in the middle of being made, and the beginning of the rehabilitating pipe 5 is temporarily moved back from the step 6a. After this, the unwound profile 100 is used to make a pipe with a smaller diameter than the already made rehabilitating pipe 5, while climbing over the step 6a. Then, as in the previous operation, the machine continues making a rehabilitating pipe 5 with a diameter corresponding to the inner diameter of the existing pipe 6.

[0033] <How to unmate> As described above, in the process of unwinding the profile 100 from the front end of the rehabilitating pipe 6 during pipe production, the drive roller 12 of the drive unit 10 is reversed, and the following profile 100 is pulled toward the drive unit 10. As a result, the self-propelled pipe making machine 1 moves in the opposite direction to that during pipe production, while disengaging the male fitting portion 130 of the following profile 100 from the female fitting portion 120 of the profile 100 at the front of the rehabilitating pipe 5.

[0034] During the above-mentioned disengagement, if the components of the self-propelled pipe making machine 1 are maintained in the same positions as during pipe making, as shown in Figure 3A, and the drive roller 12 of the drive unit 10 is reversed while the profile 100 is constrained from the radial inside and outside at the engagement position P0 by the engagement rollers 35 and engagement guides 45, a large load will be placed on the engagement parts 120, 130, which may cause damage. For example, damage may occur near the free end of the female engagement part 120 (near the upper end of the right side in Figures 1A and 1B) or the neck of the male engagement part 130. Once the engagement parts 120, 130 are damaged, they cannot be re-engaged in a good condition.

[0035] Therefore, in one embodiment of the disengagement method of the present invention, as shown in Figure 3B, the screw 51 of the adjustment mechanism 50 is turned to move the inner support frame 30 closer to the inner frame 20, thereby retracting the engaging rollers 35 radially inward. This releases the subsequent profile 100 from the radially inward constraint of the engaging rollers 35 at the engaging position P0. The male engaging portion 130 of the subsequent profile 100 is disengaged from the female engaging portion 120 of the leading profile 100 of the rehabilitating pipe 5 at position P1, which is further away from the engaging position P0 in the counterclockwise direction from the drive unit 10 (the self-propelled direction of the self-propelled pipe making machine 1 during disengagement). As a result, the load on the engaging portions 120, 130 during disengagement can be reduced, and damage to them can be avoided.

[0036] The principle of avoiding damage to the fitting portions 120, 130 will be explained with reference to Figures 4A and 4B. As shown in Figure 4A, when the fitting roller 35 and fitting guide 45 maintain the same positions as during pipe manufacturing (the positions shown in Figure 3A), and the drive unit 10 is reversed to perform fitting and unfitting while restraining the profile 100 at the fitting position P0, the fitting and unfitting position is equal to the fitting position P0. In this case, the fitting and unfitting position P0 is close to the drive unit 10, and the angle Θ0 between the direction of the tensile force F of the profile 100 starting from the fitting and unfitting position P0 and the tangent to the rehabilitating pipe 5 is relatively large. Therefore, the component force F in the tangential direction H 0 is small, and the component force F in the direction perpendicular to the tangential direction N In other words, the force required to release the engagement is large, and therefore a large load acts on the engagement portions 120 and 130.

[0037] 4B, when the constraint by the engaging roller 35 is relaxed, the disengagement position P1 is farther from the drive unit 10 than the engaging position P0. In this case, the angle Θ1 between the direction of the tensile force F of the profile 100 starting from the disengagement position P1 and the tangent of the rehabilitating pipe 5 becomes smaller. Therefore, the component force F in the tangential direction H 1 is large, and the component force F in the direction perpendicular to the tangential direction N 1. In other words, the force required to release the mating is reduced, so the load on the mating parts 120, 130 can be reduced, and damage to the mating parts 120, 130 can be avoided.

[0038] <Other aspects of the mating / unmating method> Figure 5 shows another embodiment of the fitting / unfitting method. The basic configuration is the same as that of Figure 3A, but the inner support frame 30 (see Figure 3A) is removable from the inner frame 20 (and therefore removable from the body 11). The action during pipe production is the same as that described above. In the fitting / unfitting process, the inner support frame 30 is removed from the inner frame 20 together with the fitting rollers 35, and the constraint of the profile 100 from the inside in the pipe radial direction by the fitting rollers 35 is released. This embodiment also has the same effect as the first embodiment.

[0039] In the above embodiment, the inner support frame 30 may be non-rotatably and removably connected to the inner frame 20 to eliminate the adjustment mechanism 50, or the inner support frame 30 may be removably connected directly to the body 11.

[0040] <Still another aspect of the mating / unmating method> There may be situations where simply retracting the engaging rollers 35 inward in the pipe diameter direction as shown in Figure 3B or removing the engaging rollers 35 as shown in Figure 5 is insufficient. For example, in a situation where the self-propelled pipe making machine 1 is located on the side of the rehabilitating pipe 5 as shown in Figure 6 and the disengagement position is located below the drive unit 10, the gravity G of the drive unit 10 generates a force F directed outward in the pipe diameter direction on a profile (not shown in this figure) that is pulled into the drive unit 10. G This causes the profile to bend in the same direction. As a result, the disengagement position approaches the drive unit 10, weakening the effect of retreating or removing the engagement roller 35. Also, if the engagement guide lifts the female engagement portion 120 more inward in the pipe diameter direction than necessary due to an error during assembly, the disengagement position will also approach the drive unit 10.

[0041] If the above situation is anticipated, as shown in FIG. 7 , the fitting rollers 35 are retracted or removed, and the screws 71 of the adjustment mechanism 70 are turned to rotate the inner frame 20 and the outer support frame 40 as shown by the arrows, widening the passage 60. For example, the inner frame 20 and the outer support frame 40 are rotated to the limit of play at the connection between the body 11 and the inner frame 20. This displaces the fitting guide 45 radially outward from the position where the female fitting portion 120 is housed and held. This also loosens the constraint of the fitting guide 45 from the radially outward direction of the pipe, allowing the unmating position to be moved away from the drive unit 10. Retracting the inner frame 20 radially inward to widen the passage 60 also loosens the constraint on the profile 100.

[0042] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the outer support frame 40, outer retainer 45, and adjustment mechanism 70 may be omitted from the self-propelled pipe making machine 1 described above. In this case, the profile 100 is merely constrained from the inside in the pipe radial direction during pipe making, and the constrained state can be substantially released by retracting the fitting roller 35 during fitting and unfitting. Also, the inner support frame 30, inner retainer 35, and adjustment mechanism 50 may be omitted from the self-propelled pipe making machine 1. In this case, the profile is merely constrained from the outside in the pipe radial direction during pipe making, and the fitting guide 45 is retracted toward the outside in the pipe radial direction during fitting and unfitting.

[0043] In the above-described self-propelled pipe making machine 1, the inner frame 20 may be fixed non-rotatably to the body 11 of the drive unit 10, and only the outer support frame 40 may be rotatably connected. In this case, when engaging or disengaging, only the outer support frame 40 is rotated radially outward by the adjustment mechanism 70.

[0044] In the above-described embodiment, the inner support frame is rotatably connected to the body of the drive unit via the inner frame, but it may be rotatably connected directly to the body, in which case an adjustment mechanism is provided between the body and the inner support frame.

[0045] The spiral pipe manufactured by the present invention can be used not only as a rehabilitation pipe for lining an old existing pipe, but also as a tunnel lining. [Industrial Applicability]

[0046] The present invention can be applied to the technology of manufacturing a helical tube from a strip-shaped profile. [Explanation of symbols]

[0047] 1 Self-propelled pipe making machine 5 Rehabilitation pipe (spiral pipe) 10 Drive unit 11 Body 20 Inner frame 30 Inner support frame 35 Fitting roller (inner holding tool; restraining means) 40 Outer support frame 45 Mating guide (external retainer; restraining means) 45a Support groove 50 Adjustment mechanism 60 Passage 70 Adjustment mechanism 100 Profiles 120 Female fitting part (first fitting part) 130 Male fitting part (second fitting part)

Claims

1. a strip-shaped profile having a first fitting portion on one side in the width direction and a second fitting portion on the other side having a shape complementary to the first fitting portion; and a self-propelled pipe making machine for making the profile into a helical pipe; The self-propelled pipe making machine comprises a drive unit that feeds out a profile, and a restraining means disposed away from the drive unit in the profile feeding direction, and in the pipe making process, the first fitting portion and the second fitting portion are fitted together while at least one of the profile located at the front of the spiral pipe being made and the subsequent profile fed out from the drive unit is restrained by the restraining means at a predetermined fitting position, and the machine is self-propelled by utilizing the reaction force accompanying the feeding of the profile, A method for removing profiles from a pipe making process, characterized in that, during the pipe making process, the drive unit is driven in a direction opposite to the profile feed direction to pull the subsequent profile into the drive unit, and when removing the second fitting portion of the subsequent profile from the first fitting portion of the profile at the head of the spiral pipe, the constraint on the profile by the constraint means is loosened or released.

2. The self-propelled pipe making machine further comprises an inner support frame rotatably supported on the body of the drive unit or on the tip of an inner frame extending from the drive unit in the feed direction, and an adjustment mechanism for adjusting the angle of the inner support frame, and an inner presser as the restraining means is supported on the inner support frame, During pipe manufacturing, the inner presser holds the subsequent profile at the predetermined fitting position from the inside in the pipe diameter direction, A method for removing a profile from a pipe making process as described in claim 1, characterized in that when removing the fitting, the inner support frame is rotated by the adjustment mechanism, thereby retracting the inner holding tool radially inward from its position during pipe making.

3. A method for removing a profile from a pipe making process as described in claim 2, characterized in that the inner support frame is rotatably connected to the tip of the inner frame extending from the drive unit, and the adjustment mechanism is provided between the inner frame and the inner support frame.

4. the self-propelled pipe making machine further comprises an inner support frame detachably supported on the body of the drive unit, and an inner presser as the restraining means is supported on the inner support frame; During pipe manufacturing, the inner presser holds the subsequent profile at the predetermined fitting position from the inside in the pipe diameter direction, 2. The method for disengaging a profile in a pipe manufacturing process according to claim 1, wherein the inner support frame supporting the inner presser is removed from the body when disengaging the profile.

5. The self-propelled pipe making machine further comprises an outer support frame rotatably connected to the body of the drive unit and extending in the feed direction, and an adjustment mechanism for adjusting the angle of the outer support frame, and an outer presser as the restraining means is provided at the tip of the outer support frame, During pipe manufacturing, the outer presser presses the profile at the leading end of the spiral pipe from the outside in the pipe diameter direction at the predetermined fitting position, A method for removing a profile from a pipe making process as described in claim 1, characterized in that when removing the fitting, the outer support frame is rotated by the adjustment mechanism, thereby retracting the outer clamping tool radially outward from its position during pipe making.

6. A method for removing a profile from a pipe making process as described in claim 5, characterized in that the first fitting portion is a female fitting portion that protrudes outward in the pipe diameter direction, and the outer pressing tool has a support groove that holds the female fitting portion.

7. The self-propelled pipe making machine further comprises an inner frame rotatably connected to the body of the drive unit, extending in the feed direction and positioned radially inward of the outer support frame, and a passage formed between the outer support frame and the inner frame through which a profile fed from the drive unit passes during pipe making, A method for disengaging a profile during a pipe manufacturing process as described in claim 5 or 6, characterized in that the adjustment mechanism is provided between the outer support frame and the inner frame, and when disengaging, the adjustment mechanism rotates the outer support frame and the inner frame to widen the passage compared to when manufacturing the pipe.

8. A self-propelled pipe making machine for making a belt-shaped profile into a helical pipe, the belt-shaped profile having a first fitting portion on one side in a width direction and a second fitting portion on the other side having a shape complementary to the first fitting portion, a drive unit for feeding the profile during pipe making; an inner frame connected to a body of the drive unit and extending in the feed direction; an inner support frame rotatably connected to the inner frame; an inner presser supported by the inner support frame, which presses the subsequent profile from the inside in the pipe diameter direction of the helical pipe at a predetermined fitting position when fitting the second fitting portion of the subsequent profile into the first fitting portion of the leading profile of the helical pipe during pipe manufacturing; an adjustment mechanism provided between the inner frame and the inner support frame for adjusting an angle of the inner support frame; A self-propelled pipe making machine comprising:

9. A self-propelled pipe making machine for making a belt-shaped profile into a helical pipe, the belt-shaped profile having a first fitting portion on one side in a width direction and a second fitting portion on the other side having a shape complementary to the first fitting portion, a drive unit for feeding the profile during pipe making; an outer support frame rotatably connected to a body of the drive unit and extending in the feed direction; an outer presser provided at the tip of the outer support frame, which presses the leading profile from the outside in the pipe diameter direction of the helical pipe at a predetermined fitting position when fitting the second fitting portion of a subsequent profile into the first fitting portion of the leading profile of the helical pipe during pipe manufacturing; an inner frame rotatably connected to a body of the drive unit, extending in the delivery direction, and disposed radially inward of the outer support frame; a passage formed between the outer support frame and the inner frame, through which a profile fed from the driving unit passes during pipe making; an adjustment mechanism provided between the outer support frame and the inner frame for adjusting the width of the passage; A self-propelled pipe making machine comprising:

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