JP2019059150A - Pipe making apparatus and pipe making method - Google Patents

Abstract

To omit an inner periphery regulating body of a pipe making apparatus, and to be able to make an expanded and retracted pipe of spiral pipe.SOLUTION: By a pipe making apparatus 3, an edge of a subsequent band part 92 of an unmade pipe in a band member 90 is fitted with a corresponding edge which is one round ahead of a leading pipe part 91. With the fitting, the pipe making apparatus 3 is propelled along a spiral winding direction. With an operation lever 30 (angle adjustment means), an angle of a width direction Wat a time of engagement of the subsequent band 92 is adjusted to an angle of a width direction Wat a time of engagement of a part 91k preceding by one round. The pipe is manufactured in a state where a part except for a part where the pipe making apparatus 3 is disposed in a circumferential direction of a pipe end part 91e is released from the pipe manufacturing apparatus 3.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a pipe producing apparatus and a pipe producing method for producing a helical pipe by spirally winding a belt-like member, and in particular, a so-called self-propelled pipe producing apparatus which is propelled while producing a pipe and the pipe producing apparatus Relates to a pipe making method using

  Buried existing pipes such as sewer pipes, water pipes, agricultural water pipes, gas pipes, etc. are composed of metal pipes and fume pipes. This type of existing pipe may be deteriorated due to long-term use to cause cracking or corrosion, which may lead to water leakage, gas leakage, depression, and the like. As a countermeasure therefor, there is known a renovation method of lining a rejuvenated pipe made of synthetic resin on the inner circumference of an existing pipe. A helical tube formed by spirally winding a belt member made of a synthetic resin is known as an example of a rehabilitation tube.

  A so-called self-propelled pipe making apparatus is known as a pipe making apparatus for producing a helical pipe. The pipe making apparatus of this type is disposed at the end of the end of the strip-shaped member in the extending direction of the leading pipe section which has been helically pipe-formed. Then, the edge of the trailing band portion of the unmade tube following the leading tube portion is fitted with the corresponding edge which is one turn ahead of the leading tube portion. With the fitting, the pipe making apparatus is self-propelled (propelled) along the spiral winding direction. The helical tube is gradually drawn by this (refer patent documents 1, 2 grade).

  In this type of pipe making method, the diameter of the helical pipe may decrease as the pipe making progresses. Then, the pipe-making apparatus of patent document 1 is provided with the cyclic | annular inner peripheral regulation body called what is called a link roller. The tube end portion of the leading tube portion is wound around the inner circumferential regulating body to prevent the diameter reduction. As a result, the cross section (including the shape and the diameter or the circumferential length) of the helical tube is restricted from the inner peripheral side by the inner peripheral regulating body.

  In the pipe producing apparatus of Patent Document 2, a plurality of support arms extend radially as an inner circumferential regulating body. The diameter reduction is prevented by pressing the end of the tube of the leading tube against the guide roller at the tip of the support arm. As a result, the cross section of the helical tube is regulated from the inner circumferential side by the inner circumferential regulation body.

Patent No. 4866428 gazette Patent No. 4505142

In the above-mentioned conventional pipe-making apparatus, the annular inner circumferential regulating body (Patent Document 1) and the radial inner circumferential regulating body (Patent Document 2) are enlarged. Moreover, in the pipe manufacturing apparatus which comprises an annular inner peripheral regulation body, it is not easy to cope with the change in the inner diameter of the existing pipe and the change in the sectional shape.
An object of the present invention is to provide a pipe making apparatus and a pipe making method capable of omitting the inner circumference regulating body and capable of forming a spiral pipe with a diameter expansion and contraction in view of the above-mentioned circumstances.

In order to solve the above-mentioned problems, the device according to the present invention is a pipe-making device in which a strip-shaped member is spirally wound to produce a helical tube, and which is propelled along the helical winding direction,
In a part of the circumferential direction of the end portion of the tip end side in the extending direction along the tube axis of the leading helical tube portion formed in advance in a helical shape in the strip member, the forward and backward direction of the leading helical tube portion is A device frame arranged along the winding direction;
A tube forming portion provided on the device frame, and fitting the edge of the trailing band portion of the unmade tube following the leading tube portion in the strip member with the corresponding edge of the portion preceding the one circumference of the leading tube portion;
Angle adjusting means for adjusting the angle of the trailing band width direction at the time of fitting of the trailing band portion relative to the leading band width direction at the time of fitting of the portion one round ahead;
The pipe is produced in a state in which a part other than the part in the circumferential direction of the pipe end is released from the pipe making apparatus.

According to the pipe making apparatus, by adjusting the angle of the subsequent band width direction with respect to the preceding band width direction by the angle adjusting means, it is possible to perform the diameter expansion or the diameter reduction. Specifically, the helical tube can be made larger in diameter by adjusting the angle so that the subsequent band width direction is inclined to the outside (outer peripheral side) in the pipe outer direction toward the extending front with respect to the preceding band width direction. . The helical pipe can be formed with a reduced diameter by adjusting the angle so that the subsequent band width direction is inclined inward (inner peripheral side) outward in the pipe toward the extending front with respect to the preceding band width direction.
There is no need to regulate the inner diameter of the helical tube by the inner circumferential regulating body, and by omitting the inner circumferential regulating body, the configuration of the pipe manufacturing apparatus can be simplified. In the case of relining the existing water conduit such as a sewage pipe with a spiral pipe, it is possible to alleviate the water blocking during construction.
The pipe producing apparatus is a pipe end release type pipe producing apparatus that produces a pipe in a state where a portion other than the part in the circumferential direction of the pipe end is released from the pipe producing apparatus. Therefore, the pipe making apparatus is different from those in Patent Documents 1 and 2 described above, and is an inner circumferential regulating body that regulates the cross section (shape, circumferential length, diameter) of the tube end of the leading helical tube portion from the inner circumferential side. It has a non-peripheral restriction structure without any
According to the pipe end release type pipe manufacturing apparatus, not only the spiral pipe is manufactured along the inner peripheral surface of the outer peripheral control structure such as an existing pipe, but also on the outer peripheral surface of the inner peripheral control structure such as a column. It is also possible to produce a helical tube along with it, or to produce a helical tube in a free state without the outer circumferential regulation structure and the inner circumferential regulation structure.
In the present specification, “diameter expansion” is not limited to an increase in diameter when the helical tube has a circular cross section, and an increase in circumferential length when the helical tube has an arbitrary cross section Also includes laps). The “diameter reduction” is not limited to a decrease in diameter when the helical tube has a circular cross section, but also includes a decrease in circumferential length (reduced circumferential length) when the helical tube has an arbitrary cross section.
Moreover, "a pipe end part" means about one circumference part of the front end of the direction (elongation direction) in which a leading pipe part is extended along a pipe axis. The front in the stretching direction is referred to as "stretching front", and the back in the stretching direction is referred to as "stretching back".

The pipe making section has a constraining part configured to constrain the trailing band width direction along a device width direction orthogonal to a propelling front-rear direction of the pipe manufacturing frame;
It is preferable that the device width direction of the pipe making frame is angle-adjusted with respect to the leading band width direction by the angle adjusting means.
By this, the helical tube can be expanded and contracted in diameter by inclining the apparatus width direction of the pipe making frame and thus the entire pipe making apparatus with respect to the preceding band width direction. Specifically, the helical tube is enlarged by adjusting the angle of the tube making frame and thus the entire tube making device so that the device width direction is inclined outward toward the front with respect to the preceding band width direction. I can do it. The helical tube can be made to have a reduced diameter by adjusting the angle of the tube making frame and thus the entire tube making device so that the device width direction is inclined inward toward the inside of the tube outward toward the extending front with respect to the preceding band width direction.

It is preferable that the angle adjustment means includes a control lever which can be gripped by being protruded from the device frame.
By tilting the entire pipe-making apparatus with the control lever, the apparatus width direction can be adjusted in angle with respect to the preceding band width direction. As a result, the helical tube can be expanded and contracted by simple and inexpensive means.

The angle adjustment means is projected from the outside on one side or the other side in the apparatus width direction of the apparatus frame to the outside of the pipe outside direction of the inside of the preceding pipe part, and the inside of the outer peripheral regulating body surrounding the spiral pipe It may include a tension member that is in tension against the circumferential surface or the inner circumferential surface of the leading pipe portion.
The entire pipe-making apparatus can be inclined toward the outer periphery toward the extending front with respect to the preceding band width direction by abutting the supporting member against the inner peripheral surface of the preceding pipe part. By this, it is possible to carry out pipe expansion. By abutting the supporting member against the outer peripheral regulating body, the entire pipe-making apparatus can be inclined to the inner peripheral side toward the extending front with respect to the preceding band width direction. By this, the diameter can be reduced.

The pipe forming section has a constraining section that constrains the trailing band width direction to a constraining angle variable with respect to a device width direction orthogonal to the propelling front-rear direction of the pipe manufacturing frame, and the angle adjusting unit The restraint angle by the unit may be adjusted in angle with respect to the device width direction.
As a result, the apparatus width direction of the entire pipe making apparatus is held constant along, for example, the pipe axis of the helical pipe, and the trailing band width direction is the leading band by adjusting the restriction angle by the restriction part. The angle can be adjusted with respect to the width direction.

The tube forming portion is a pair of drive rollers that obliquely push the tube end portion across the trailing band portion, and a tube end guide means slidably engaged with the tube end portion in the winding direction Is preferred.
Examples of the engagement include locking, pressing, hooking, and clamping.
Preferably, the tube end guide means includes the restraining portion.

The method of the present invention is a method for producing a helical tube from a strip-shaped member,
A step of fitting the edge of the trailing band portion of the non-produced pipe following the preceding helically formed pipe portion of the strip member by the pipe making device with the corresponding edge preceding the circumference of the leading pipe portion When,
A step of propelling the pipe-making apparatus along the spiral winding direction along with the fitting;
Adjusting the angle of the trailing band width direction, which is the width direction at the time of fitting of the trailing band portion, with respect to the leading band width direction, which is the width direction at the fitting of the one round preceding portion;
The pipe is produced in a state in which a part other than the part where the pipe making apparatus is disposed in the circumferential direction of the pipe end is released from the pipe making apparatus.
By adjusting the angle, the helical tube can be expanded or reduced in diameter.

The trailing band width direction is restrained along the apparatus width direction orthogonal to the propelling front-rear direction of the pipe making apparatus by the constraining portion of the pipe making apparatus, and in the angle adjustment step, the apparatus width of the pipe making apparatus Preferably, the direction is adjusted in angle with respect to the preceding band width direction.
It is more preferable to perform the said angle adjustment by the control lever protruded from the said pipe-making apparatus.
The restraint section of the pipe making apparatus constrains the trailing band width direction to a variable restraint angle with respect to the apparatus width direction orthogonal to the propelling longitudinal direction of the pipe making apparatus, and in the angle adjustment step, the restraint section It is also possible to adjust the restraint angle by

  According to the present invention, the inner circumferential regulating body of the pipe making apparatus can be omitted, and the spiral pipe can be made to be an expanded and contracted pipe.

FIG. 1 is a cross-sectional view showing how an existing pipe is reformed by the lining of a rehabilitated pipe consisting of a helical pipe. FIG. 2: is the description side view which looked at the pipe-making apparatus based on 1st Embodiment of this invention from extending | stretching front. FIG. 3 is a perspective view for explaining how the helical tube is formed by the pipe making apparatus. Fig.4 (a) is sectional drawing of the strip | belt-shaped member which comprises the said helical tube in alignment with the IVa-IVa line of FIG. FIG.4 (b) is sectional drawing of the said helical tube in alignment with the IVb-IVb line | wire of FIG. FIG.4 (c) is sectional drawing of the said helical tube in alignment with the IVc-IVc line | wire of FIG. FIG. 5 is a cross-sectional view of the front side pipe end guide of the pipe making apparatus, taken along the line V-V of FIG. 2. 6 is a cross-sectional view of the pipe-making apparatus, taken along the line VI-VI of FIG. FIG. 7 is a side view of the control lever of the pipe manufacturing apparatus, taken along the line VII-VII in FIG. FIG. 8 is a cross-sectional view showing the appearance of the diameter-increased production pipe in the first embodiment. FIG. 9 is a cross-sectional view of a helical tube subjected to an increase in diameter. FIG. 10 is a cross-sectional view showing a state of a diameter-increased pipe in a case where the gap between the existing pipe and the rehabilitating pipe is narrow. FIG. 11 is a cross-sectional view showing the rejuvenated pipe after the pipe making apparatus has passed in FIG. FIG. 12 is a cross-sectional view showing the diameter-reduced tube in the first embodiment. FIG. 13 is a cross-sectional view showing the appearance of a diameter-expanded tube according to a second embodiment of the present invention. FIG. 14 is a cross-sectional view showing the diameter-reduced tube in the second embodiment. FIG. 15 is a cross-sectional view showing the appearance of a diameter-expanded tube according to a third embodiment of the present invention. FIG. 16 is a cross-sectional view showing a diameter-reduced tube according to a third embodiment of the present invention. FIG. 17 is a cross-sectional view showing a diameter-increased pipe-making in the fourth embodiment of the present invention. FIG. 18 is a cross-sectional view showing a diameter-reduced tube according to a fourth embodiment of the present invention. FIG. 19 is a side view showing a pipe producing apparatus according to a fifth embodiment of the present invention. FIG. 20 is a cross-sectional view showing the diameter-increased production tube in the fifth embodiment. FIG. 21 is a cross-sectional view showing an aspect of the diameter reducing tube according to the fifth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment
FIG. 1 shows a state in which the old existing pipe 1 is rebuilt. Examples of the existing pipe 1 include a sewer pipe, a water pipe, a water pipe for agriculture, a water pipe for hydroelectric power generation, a gas pipe and the like.
An inner wall of the existing pipe 1 is lined with a rehabilitating pipe 9. The rehabilitation pipe 9 is constituted by a long strip member 90 and has a spiral tubular shape. Hereinafter, the rejuvenated pipe 9 is appropriately referred to as a "helical pipe 9".

  As shown in FIG. 4A, the strip member 90 includes a flat band portion 90x, a first fitting portion 93, a second fitting portion 94, and a plurality of ribs 95, and has a constant cross section. , Extends in a direction substantially orthogonal to the plane of the drawing. The front side surface (the upper surface in FIG. 4A) of the flat flat band portion 90x constitutes the inner peripheral surface of the helical tube 9. The rear surface (the lower surface in FIG. 4A) of the flat band portion 90x is directed to the outer periphery of the helical tube 9. Ribs 95 are provided on the back surface, and grooves 95b and 95c are formed.

A concave first fitting portion 93 is provided at an edge of one side (left side in FIG. 4A) of the flat band portion 90x in the width direction. A convex second fitting portion 94 is provided at an edge of the other side (right side in FIG. 4A) of the flat band portion 90x in the width direction. The concave portion of the first fitting portion 93 and the convex portion of the second fitting portion 94 are complementary to each other.
As shown in FIGS. 4 (b) and 4 (c), fitting portions 93 and 94 adjacent to each other in the spiral tube 9 are joined to each other by concavo-convex fitting. As shown in FIG. 4C, the first fitting portion 93 of the strip member 90 in the helical tube 9 is directed forward in the drawing direction ED (hereinafter referred to as "stretched front" as appropriate. Left in the figure). The second fitting portion 94 is directed to the rear in the stretching direction ED (hereinafter, referred to as “stretched rear” as appropriate. In the same figure, to the right).

  Almost the entire belt-like member 90 is made of, for example, a synthetic resin such as polyvinyl chloride. A metal reinforcing band 95 d such as steel is embedded in the rib 95. In the vicinity of the fitting portions 93 and 94 of the flat band portion 90x, a sealing material 90s (shown only in FIG. 4) made of water-proof rubber or the like is provided.

As shown in FIG. 1 and FIG. 3, the band-like member 90 in the middle of pipe making includes a leading pipe part 91 which has already been pipe-made and a subsequent band part 92 of an unmade pipe following this. The belt-like member 90 is wound in a spiral winding direction to form a spiral tubular leading tube portion 91. As the pipe making proceeds, the leading pipe portion 91 is gradually drawn along the pipe axis L ₉ of the leading pipe portion 91. The about a circumference portion of the front end (left end in FIG. 1) in the stretching direction ED along the tube axis L ₉ of the prior tube portion 91 referred to as a "tube end 91e '.

As shown in FIGS. 1 and 3, the trailing band portion 92 is passed from the winding drum 5 on the ground through the human hole 4 and passed through the inside of the leading pipe portion 91 to wind the pipe end 91 e of the leading pipe portion 91. It is continuous with the tip portion in the rotational direction and in the belt length direction. As shown in FIG. 4C, the second fitting portion 94 of the band portion 92k in the continuous portion of the trailing band portion 92 is the first portion of the portion 91k which is one turn ahead of the band portion 92k in the leading pipe portion 91. 1 is fitted with the fitting portion 93.
The band width direction of the trailing band portion 92k at the time of fitting is referred to as a trailing band width direction W _92k, and the band width direction of the one-round leading portion _91k is referred to as a leading band width direction W _91k . The trailing band portion 92k is fitted into the tube end 91e of the leading tube portion 91 by fitting, and becomes a new tip portion in the winding direction of the tube end 91e.

  As shown in FIGS. 1 to 3, the pipe producing device 3 is disposed on a part of the tube end 91 e of the leading pipe portion 91 in the circumferential direction. The pipe making apparatus 3 is propelled clockwise in FIG. 3 along the spiral winding direction while forming the spiral pipe 9.

As shown in FIG. 1, the propelling front-rear direction LD of the pipe manufacturing apparatus 3 is along the winding direction. The width direction WD of the pipe making apparatus 3 is orthogonal to the winding direction and is substantially along the pipe axis L ₉ of the helical pipe 9. As shown in FIG. 2, the height direction HD in the pipe making apparatus 3 (and the apparatus frame 3 f described later) is orthogonal to the width direction WD and the forward and backward propulsion direction LD, and in the inward and outward direction VD (radial direction) It is directed.
As described below, the scaling径時, the device width direction WD is inclined to the tube axis L _9, and device height direction HD may be inclined with respect to the tube outward VD.

  As shown in FIG. 3, the pipe production apparatus 3 is a pipe end release type pipe production apparatus. That is, the pipe making apparatus 3 performs pipe making in a state in which the pipe forming apparatus 3 releases a part other than the portion where the pipe making apparatus 3 is disposed in the circumferential direction of the pipe end 91 e of the leading spiral pipe portion 91. Therefore, the pipe making apparatus 3 has a non-inner circumferential restriction structure. That is, it does not have the inner circumference regulating body which regulates the cross section (shape, circumferential length, diameter) of the pipe end portion 91e from the inner circumference side. The pipe making is performed in a state where the pipe end 91 e is released to the inner peripheral side.

As shown in FIGS. 2 and 3, the pipe producing apparatus 3 includes an apparatus frame 3 f, a pipe producing section 3 a, and an angle adjusting unit 30.
As schematically shown in FIGS. 2 and 3, the device frame 3 f includes a drive frame 15 and a guide frame 25.
As shown in FIG. 2, the drive frame 15 is disposed on the front side (left in FIG. 2) of the propelling longitudinal direction LD in the pipe making apparatus 3 and on the front side (upper in FIG. 2) of the apparatus height direction HD. . A guide frame 25 extends from the drive frame 15 toward the bottom side (peripheral side, lower in FIG. 2) in the device height direction HD and to the rear of the forward and backward propulsion direction LD (hereinafter referred to as “propulsion backward”). As shown in FIG. 6, the guide frame 25 includes three frame plates 25a, 25b, 25c. The frame plates 25a, 25b, 25c are arranged in the pipe-making width direction WD (left and right in FIG. 6).

The pipe producing section 3a is provided on the apparatus frame 3f.
The pipe making unit 3a is a helical tube by fitting one edge (second fitting portion 94) of the trailing band portion 92 with the opposing edge (first fitting portion 93) preceding by one turn of the leading tube portion 91. Make 9 pipes. As shown in FIGS. 2 and 3, the fitting is performed in or near the arrangement portion of the pipe manufacturing apparatus 3 in the circumferential direction of the pipe end 91 e of the leading pipe portion 91.
In addition, the fitting position with respect to the pipe making apparatus 3, ie, the position of the fitting time band parts 91k and 92k, is not necessarily fixed, and may be fluctuate | varied to the propulsion front-back direction LD.

  As shown in FIGS. 2 and 3, the pipe making unit 3 a includes a drive unit 10 (drive unit) and a tube end guide unit 20. The drive means 10 has a pair of drive rollers 11 and is stored in the drive frame 15. The axis of the drive roller 11 is directed in the device width direction WD. A trailing band 92 is sandwiched between the pair of drive rollers 11. The driving roller 11 obliquely pushes the trailing band portion 92 from the inner peripheral side of the leading pipe portion 91 to the pipe end portion 91 e.

  A pipe end guide means 20 is provided at the bottom (lower side in FIG. 2) of the pipe manufacturing apparatus 3 in the height direction HD. The tube end guide means 20 includes a front side tube end guide 21, a rear side tube end inner circumferential guide 22, and a rear side tube end outer circumferential guide 23. These guides 21, 22 and 23 are incorporated in the guide frame 25 and are engaged (engaged) movably in the forward and rearward direction LD with respect to the tube end 91 e of the leading tube portion 91.

  As shown in FIG. 2 and FIG. 3, the front side pipe end guide 21 is forward of the forward and backward direction LD from the portion where the fitting time band portions 91k and 92k in the pipe making apparatus 3 are located (hereinafter Is located on the left). The front tube end guide 21 is offset from the drive roller 11 of the drive means 10 by one pitch of the helical tube 9 to the extension rear side (the rear side in the drawing of FIG. 2) in the device width direction WD.

  As shown in FIG. 2, the front side pipe end guide 21 includes an outer peripheral guide portion 21 a on the bottom side (outer peripheral side) in the device height direction HD and a pressing portion 21 d on the front side (inner peripheral side). The portion of the tube end portion 91e of the leading tube portion 91 that is less than one turn is held by the outer peripheral guide portion 21a and the pressing portion 21d from both the outer periphery and the inner periphery.

As shown in FIG. 5, the outer peripheral guide portion 21a includes a plate-shaped receiving portion 21b and two (plural) protruding locking portions 21f. The receiving portion 21 b is applied to the outer surface of the pipe end 91 e of the leading pipe portion 91. The locking portion 21 f protrudes from the receiving portion 21 b toward the pressing portion 21 d. The locking portion 21 f is locked in a locking groove 95 c on the center side of the leading pipe portion 91 so as to be slidable in the propelled longitudinal direction LD.
As shown in FIG. 2, rollers 21 c are provided on the front and rear sides of the outer peripheral guide portion 21 a. The roller 21 c rolls in contact with the inner periphery of the existing pipe 1.

The pressing portion 21 d is pressed against the inner circumferential surface of the tube end 91 e of the leading tube portion 91. The pressing force can be appropriately adjusted by a bolt 21 h (a pressing force adjustment unit).
Along with the promotion of the pipe manufacturing apparatus 3, frictional resistance is generated between the front side pipe end guide 21 and the leading pipe portion 91. The magnitude of the frictional resistance can be appropriately adjusted by the locking portion 21 f.

As shown in FIG. 2 and FIG. 3, the rear side pipe end outer peripheral guide 23 is disposed apart from the front side pipe end guide 21 in a propelled rearward direction. The tube end outer peripheral guide 23 is disposed at the same position as the drive roller 11 in the device width direction WD.
A trailing band portion 92k at the time of fitting is disposed near the end 23 of the pipe end outer peripheral guide 23 in the forward and backward direction LD of the pipe manufacturing apparatus 3 or on the outer end guide 23 of the end of the pipe.

As shown in FIG. 6, the tube end outer peripheral guide 23 has a plate-shaped receiving portion 23b and a protruding locking portion 23f. The receiving portion 23b is applied from the outer peripheral side (lower side in FIG. 6) of the pipe end portion 91 to the fitting time band portions 92k and 91k or the vicinity thereof. A locking portion 23f is provided at the end of the extension rear side (right end in FIG. 6) of the receiving portion 23b. The locking portion 23f is locked (engaged) in the locking groove 95b on the first fitting portion 93 side in the one-round leading portion 91k or in the vicinity thereof.
As shown in FIG. 2, rollers 23 c are provided on the front and rear sides of the tube end outer peripheral guide 23. The roller 23 c rolls in contact with the inner peripheral surface of the existing pipe 1.

As shown in FIG.2 and FIG.3, the pipe end inner peripheral guide 22 (pressing part) is arrange | positioned rather than the pipe end outer peripheral guide 23 in the propulsion back (right side in FIG. 2). The tube end inner circumferential guide 22 is in the form of a roller, and its axis is directed in the tube width direction WD. The tube end inner circumferential guide 22 is pressed against the inner circumferential surface of the tube end 91 e of the leading tube portion 91.
The band width direction W ₉₂ k of the trailing band portion 92 k at the time of fitting is restrained along the device width direction WD by the tube end guide means 20 (restraint portion) including the tube end guides 21, 22, 23.

As shown in FIG. 2 and FIG. 3, the pipe making apparatus 3 is provided with an operation lever 30 as an angle adjusting means.
As shown in FIG. 6, the operation lever 30 includes a lever portion 31 and a grip portion 32. The base end of the lever portion 31 is connected to the device frame 3 f via a connection bolt 33. The lever portion 31 is projected from the device frame 3 f to the upper side in the device height direction HD of the pipe manufacturing device 3 or the inner side of the spiral pipe 9. A grip portion 32 is provided at the tip of the lever portion 31.
The length of the control lever 30 is preferably set to a length that facilitates application of force in a posture in which the operator stands, and is, for example, about 50 to 150 cm.

As shown by a two-dot chain line in FIG. 7, when the connection bolt 33 is loosened, the control lever 30 can be angularly adjusted around the axis of the connection bolt 33 so as to be inclined in the forward and rearward direction LD. By tightening the connection bolt 33, the operation lever 30 is fixed to the device frame 3f. Therefore, the control lever 30 can be fixed after being adjusted to an angle easy for the operator to operate.
The operation lever 30 may be fixed to the apparatus frame 3 f so as not to be adjustable in angle.

  The control lever 30 is attached to the central frame plate 25b in the device frame 3f, but may be attached to the frame plate 25a on the extension front side (left in FIG. 6), and the extension rear side (right in FIG. 6) It may be attached to the frame board 25c of. The mounting position of the operation lever 30 is not particularly limited as long as it can be firmly attached to the device frame 3 f.

By the pipe making apparatus 3, the regenerating pipe 9 (helical pipe) is produced as follows, and the existing pipe 1 is rebuilt.
As shown in FIG. 2, by driving the drive roller 11, the trailing band 92 is pushed diagonally from the drive means 10 toward the tube end 91 e. As a result, as shown in FIGS. 4B and 4C, the second fitting portion 94 of the trailing band portion 92k and the first fitting portion 93 of the leading portion 91k of the leading pipe portion 91 are fitted. It is done (fitting process). At this time, the receiving portions 21 b and 23 b receive the fitting force from the outer peripheral side of the leading pipe portion 91.
Furthermore, by the fitting, a propulsion reaction force is generated, and the pipe making apparatus 3 is helically propelled clockwise in FIG. 3 (propelling process). By this, the regenerating pipe 9 can be produced along the inner surface of the existing pipe 1 while the pipe producing device 3 is allowed to move by itself.

The pipe end device 21, 22, 23 can be engaged (engaged) so as to be relatively movable in the winding direction of the tube end 19e of the leading pipe portion 91, whereby the pipe making apparatus 3 can be guided in the winding direction. .
Furthermore, when the tube end inner circumferential guide 22 presses from the inner circumferential side the leading pipe portion 91 at the rear of the propulsion from the trailing band portion 92k at the time of fitting, the fitting portions 93 and 94 can be fitted more reliably. It is possible to prevent the fitting from becoming insufficient.
At the time of driving the pipe producing apparatus 3, an operator can hold the control lever 30 to support the pipe producing apparatus 3. Therefore, pipe making can be performed in a state in which the posture of the pipe making apparatus 3 is stabilized.

As shown in FIG. 1, the existing pipe 1 is not limited to a constant inner diameter or a cross-sectional shape over the entire length, and a cross-sectional change portion 1 a may be formed. According to the pipe making apparatus 3, it is possible to freely cope with such cross-sectional change of the existing pipe 1.
That is, by tilting the operation lever 30 in accordance with the cross section change, the width direction WD of the apparatus frame 3f and hence the entire pipe making apparatus 3 is angularly adjusted with respect to the preceding band width direction W _91k . Then, the angle in the width direction _{W 92k} subsequent strip portion 92k constrained by the tube end guide means 20 with respect to the width direction _{W 91k} one round preceding portion 91k is adjusted (angle adjustment step). As a result, the diameter of the helical tube 9 can be increased or decreased.

For example, when producing the renovated pipe 9 along the inner surface of the enlarged diameter changing portion 1b (FIG. 1), as shown in FIG. 8, the operating lever 30 is extended forward (left in FIG. 8). The device width direction WD is _inclined toward the outer peripheral side (down in FIG. 8) toward the extending front (left in FIG. 8) with respect to the preceding band width direction W _{91 k} . As a result, the trailing band portion 92k restrained by the pipe end guide means 20 bends in these fitting portions 93 and 94 with respect to the one-round leading portion 91k, and the trailing band width direction W _92k is the leading band width direction. It is inclined to the outer peripheral side toward the extending front with respect to W _{91 k} . As a result, as shown in FIG. 9, the helical tube 9 can be expanded. By adjusting the tilt angle of the control lever 30, the diameter expansion degree of the helical tube 9 can be adjusted.

As shown in FIG. 10, when the gap between the existing pipe 1 and the regenerating pipe 9 is narrow, the portions 91k, 91j leading several rounds from one round in the leading pipe portion 91 when the pipe making device 3 is inclined. It may be lifted so as to be inclined to the inner peripheral side (upper side in FIG. 10) toward the extension front. In FIG. 10, a portion 91k leading one round and a portion 91j leading two rounds with respect to the subsequent band portion 92k at the time of fitting are lifted obliquely, but the invention is not limited thereto. You may lift it.
By this, even if the gap between the existing pipe 1 and the regenerating pipe 9 is narrow, the pipe making apparatus 3 is sufficiently inclined toward the outer periphery side (lower side in FIG. 10) toward the extending front (left side in FIG. 10). be able to. Therefore, the subsequent band width direction W _{92 k} can be surely inclined toward the outer peripheral side (lower side in FIG. 10) toward the extending front with respect to the preceding band width direction W _{91 k} .

As shown in FIG. 11, the portions 91k and 91j preceding the one turn to several turns after the pipe making device 3 passes elastically return to the state before being lifted. Along with this, the subsequent band portion 92 k approaches the inner surface of the existing pipe 1 or is pressed against the inner surface of the existing pipe 1. By this, the regenerating pipe 9 can be formed so as to be stuck to the inner surface of the existing pipe 1. In this case, the diameter increase of the rejuvenated pipe 9 is suppressed by the existing pipe 1 to be a straight pipe.
Although the trailing band portion 92k in FIG. 10 is incorporated into the leading pipe portion 91 in the state of FIG. 11 after the pipe making apparatus 3 has passed, it is not the trailing band portion 92k. The same name and code are used as they are for the portion which was the subsequent band portion 92k. The same applies to the portions 91k and 91j leading one turn to several turns.

When producing the rehabilitating pipe 9 along the inner surface of the diameter-changed portion 1c (FIG. 1), as shown in FIG. 12, the device width is obtained by tilting the operation lever 30 backward (right in FIG. 12). Direction WD is _{inclined inwardly} (upward in FIG. 8) toward the extending front (right in FIG. 12) with respect to preceding band width direction W _91k . As a result, the trailing band portion 92k restrained by the pipe end guide means 20 bends in these fitting portions 93 and 94 with respect to the one-round leading portion 91k, and the trailing band width direction W _92k is the leading band width direction. _With respect to W _{91 k} , it is inclined to the inner peripheral side toward the extending front. As a result, the helical tube 9 can be reduced in diameter. By adjusting the tilt angle of the operation lever 30, the degree of diameter reduction of the helical tube 9 can be adjusted.

  In the pipe making apparatus 3, pipe making is possible even without the annular inner circumference regulating body of Patent Document 1 and the radial inner circumference regulating body of Patent Document 2. Therefore, the pipe making apparatus 3 can be miniaturized. Furthermore, even if the existing pipe 1 has a non-circular cross section such as a square, for example, the spiral pipe 9 having a non-circular cross section can be easily manufactured according to the inner circumferential surface because there is no inner circumferential regulating body. it can.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for configurations overlapping with the above-described embodiment, and the description will be omitted.
Second Embodiment
FIGS. 13 and 14 show a pipe producing apparatus 3B according to a second embodiment of the present invention. The pipe making apparatus 3B is provided with a bending member 40 (tilting member) as an angle adjusting means. The supporting member 40 is protruded from the outside in one or the other side in the device width direction WD of the device frame 3 f in the in-pipe outward direction VD.

  In more detail, as shown in FIGS. 13 and 14, the pipe making apparatus 3 </ b> B is provided with a bending member 40 for diameter-increased pipe production and a tension member 40 for diameter-reduced pipe production. Hereinafter, when these tension members 40 are distinguished from each other, “A” is added to the reference numerals of the tension members 40 for diameter expansion tube production and their components (FIG. 13), and the tension members 40 for diameter expansion tube fabrication and their configuration The symbol of the element is given "A" (FIG. 14).

  As shown in FIG. 13, in the pipe making apparatus 3B at the time of diameter expansion pipe making, the supporting member 40A is provided on the side (the right side in FIG. 13) of the device frame 3f after the extension. The supporting member 40A includes a supporting roller 41A and a roller shaft 42A. A roller shaft 42A is extended rearward (right in FIG. 13) from the frame plate 25c of the apparatus frame 3f. The axis of the roller shaft 42A is oriented in the device width direction WD. A support roller 41A is provided at the tip of the roller shaft 42A. The tension roller 41A is formed in a disk shape orthogonal to the roller shaft 42A, and is rotatable around the roller shaft 42A. The radius of the tension roller 41A is larger than the distance from the axis of the roller shaft 42A to the ground contact surface to the spiral tube 9 in the tube end inner peripheral guide 22. A part of the tension roller 41A is protruded to the outer side in the device height direction HD (outside the pipe in the pipe outer direction VD) than the pipe end inner circumferential guide 22.

The tension roller 41A is in contact with the inner peripheral surface of the leading pipe portion 91 at the extension rear (right side in FIG. 13) of the apparatus frame 3f and is in tension. As a result, the width direction WD of the apparatus frame 3f and hence the pipe making apparatus 3B is angled so as to be inclined _outward (left in FIG. 13) and _outward (downward in FIG. 13) with respect to the preceding band width direction W _91k . Adjusted. Furthermore, the width direction W ₉₂ k of the subsequent band portion 92 k restrained by the tube end guide means 20 is inclined _outward in the extending direction with respect to the width direction W ₉₁ k of the one-round leading portion 91 k. As a result, the helical tube 9 can be expanded in diameter (see FIG. 9).

  As shown in FIG. 14, in the pipe making apparatus 3B at the time of diameter reduction pipe making, the supporting member 40B is provided on the side (the left side in FIG. 14) of the device frame 3f. The supporting member 40B includes a supporting roller 41B and a roller shaft 42B. A roller shaft 42B extends forward (left in FIG. 14) from the side of the frame plate 25a near the bottom in the device height direction HD. The axis of the roller shaft 42B is directed in the device width direction WD. The tension roller 41B is provided at the tip of the roller shaft 42B. The tension roller 41B is formed in a disk shape orthogonal to the roller shaft 42B, and can rotate around the roller shaft 42B.

About half of the tension roller 41B protrudes from the device frame 3f to the bottom side in the device height direction HD (outside the tube in the tube outer direction VD), and further extends from the leading tube portion 91 to the existing pipe 1 (helix The inner circumferential surface of the outer peripheral regulating body surrounding the pipe 9 is in tension. Thus, the width direction WD of the pipe making apparatus 3B is angle-adjusted so as to be inclined to the front (the left in FIG. 14) and the inner peripheral side (the upper in FIG. 14) with respect to the preceding band width direction W _91k . . Furthermore, the width direction W ₉₂ k of the subsequent band portion 92 k restrained by the pipe end guide means 20 is inclined inwardly toward the extending front with respect to the width direction W ₉₁ k of the one-round leading portion 91 k. As a result, the helical tube 9 can be reduced in diameter.
In the diameter reduction pipe making of the second embodiment, the support roller 41B may be separated from the existing pipe 1 in the vicinity of the pipe top of the existing pipe 1 or the like, but at least in the vicinity of the pipe bottom of the existing pipe 1 It is possible to obtain the diameter reducing action by pushing the tension roller 41B against the inner peripheral surface of the existing pipe 1 by gravity.
In the second embodiment, even if the operator does not apply a force, the pipe forming apparatus 3B can be inclined to make the helical pipe 9 a pipe for expansion and contraction.

Each of the diameter expansion strut 40A and the diameter reduction strut 40B may be detachable from the pipe making apparatus 3B. It is also possible to attach the diameter expanding stay member 40A at the time of expanding the diameter of the tube and attach the diameter reducing strut 40B at the time of the diameter reducing pipe making.
Both the diameter expanding strut 40A and the diameter expanding strut 40B may be always mounted on the pipe making apparatus 3B. At the time of diameter expansion pipe making, it is possible to retract so that the diameter diameter expanding member 40B does not hit the existing pipe 1, and at the time of diameter diameter forming pipe, the diameter expansion expanding member 40A does not collide with the leading pipe portion 91. It may be retractable.
The tension member 40 is not limited to a roller, and may be a tension rod.

In the first and second embodiments, by tilting the width direction WD of the entire pipe making apparatus 3, _3B , the angle formed by the subsequent band width direction W _92k with _respect to the preceding band width direction W _{91 k} is adjusted. As in the following embodiment, while the device width direction WD is kept constant, the above-mentioned angle may be adjusted by adjusting the restraint angle of the trailing band width direction W _92k by the tube end guide means 20. .
Third Embodiment
FIG.15 and FIG.16 shows the pipe-making apparatus 3C based on 3rd Embodiment of this invention. In the pipe making apparatus 3C, the angle adjustment means 50 is incorporated in the pipe end guides 22 and 23 of the pipe end guide means 20 (restraint part in the trailing band width W _92k ). The angle adjustment means 50 can adjust the restraint angle in the subsequent band width direction W _{92 k} .
Specifically, the angle adjustment mechanism 50 includes adjustment bolts 51 and 51, a pressing frame 52, and locking portions 23f and 23g. The pressing frame 52 covers the tube end inner circumferential guide 22 (pressing portion) from above in the device height direction HD. The tube end inner circumferential guide 22 is accommodated in the pressing frame 52. The shaft portion of the tube end inner circumferential guide 22 is rotatably connected to and supported by the pressing frame 52.

Two (plural) adjustment bolts 51 and 51 are provided on a connecting plate 25d that connects the frame plates 25a and 25b of the apparatus frame 3f. The two adjustment bolts 51, 51 are separated from each other in the device width direction WD of the pipe manufacturing device 3C. The tip end portions (lower end portions in FIG. 15) of the respective adjustment bolts 51, 51 abut on the pressing frame 52 or are connected to the pressing frame 52. By adjusting the screwing amount of the adjusting bolts 51, 51, the angle of the axis of the tube end inner circumferential guide 22 can be adjusted to be inclined with respect to the device width direction WD via the pressing frame 52. By pinching the vicinity of the subsequent band portion 92k by the pipe end inner peripheral guide 22 and the pipe end outer peripheral guide 23, the width direction W _92k of the subsequent band portion _92k is constrained. The restraint angle in the subsequent band width direction W _{92 k} is variably adjusted with respect to the device width direction WD by the angle adjustment of the tube end inner circumferential guide 22.

As shown in FIG. 15, at the time of diameter-expanding production, the axis line of the tube end inner circumferential guide 22 extends outward (left in FIG. 15) with respect to the device frame 3f by the adjusting bolts 51, 51. It is made to lean to the bottom (in FIG. 15). Also, the locking portion 23 f of the tube end outer peripheral guide 23 is protruded higher than in the first embodiment (FIG. 6). As a result, when the trailing band portion 92k follows the outer circumference of the tube end inner circumferential guide 22, the trailing band width direction W _92k is inclined _outward toward the leading _{edge with} respect to the leading band width direction W _91k . As a result, the spiral pipe 9 can be expanded. The degree of diameter expansion can be adjusted by adjusting the angle of the tube end inner peripheral guide 22 with the adjustment bolts 51, 51.

As shown in FIG. 16, at the time of diameter reduction pipe making, the axis line of the tube end inner circumferential guide 22 extends forward with respect to the device frame 3f (left in FIG. 16) by the adjusting bolts 51, 51 It is inclined to the side (up in FIG. 16). In addition, the locking portion 23g is installed on a portion on the extension front side (left side in FIG. 16) of the tube end outer peripheral guide 23. The locking portion 23g protrudes higher than the locking portion 23f on the extension rear side (right side in FIG. 16), and lifts the end on the extension front side (left side in FIG. 16) of the subsequent band portion 92k. As a result, the trailing band portion 92k follows the outer circumference of the tube end inner circumferential guide 22 so that the trailing band width direction W _92k is inclined inwardly toward the front with respect to the leading band width direction W _91k . As a result, the helical tube 9 can be reduced in diameter. The angle reduction degree can be adjusted by adjusting the angle of the tube end inner peripheral guide 22 by the adjustment bolts 51, 51.
Since the inner end guide 22 of the pipe end is slightly behind but close to the rear (in front of the sheet in FIGS. 15 and 16) with respect to the following band portion 92k at the time of fitting, the pipe end portion The deformation of the inclined portion directly pressing against the tube end inner peripheral guide 22 in 91e extends to the subsequent band portion 92k, and the subsequent band portion 92k is inclined.

Fourth Embodiment
FIG.17 and FIG.18 shows pipe-making apparatus 3D based on 4th Embodiment of this invention. In the pipe making apparatus 3D, the pipe end inner circumferential guide 22D (angle adjusting means) of the pipe end guiding means 20 (restraint portion) is tapered. The axis of the tapered tube end inner circumferential guide 22D is along the device width direction WD.

As shown in FIG. 17, at the time of diameter-expanding production, the tapered tube end inner circumferential guide 22D is installed so as to expand in diameter forward (left in FIG. 17). And the latching | locking part 23f of the pipe end outer periphery guide 23 is protruded higher than 1st Embodiment (FIG. 6). Thereby, the trailing band portion 92k follows the inclination of the outer periphery of the tapered tube end inner circumferential guide 22D, whereby the trailing band width direction W _92k extends forward with respect to the leading band width direction W _91k . It is inclined to the outer peripheral side (lower side in FIG. 17) of the direction VD. As a result, the spiral pipe 9 can be expanded.

As shown in FIG. 18, at the time of diameter reduction pipe making, a tapered tube end inner circumferential guide 22D is installed so as to decrease in diameter toward the extending front (left in FIG. 18). The locking portion 23g on the extension front side (left side in FIG. 18) of the tube end outer peripheral guide 23 protrudes higher than the locking portion 23f on the extension rear side (right side in FIG. 18), and the extension front of the trailing band portion 92k The end of the side (left side in FIG. 18) is lifted. As a result, the trailing band portion 92k follows the inclination of the outer circumference of the tapered tube end inner circumference guide 22D, whereby the trailing band width direction W _92k is the inner circumference side extending forward with respect to the leading band width direction W _91k . Be inclined to As a result, the helical tube 9 can be reduced in diameter.
The tube end inner circumferential guide 22D is slightly away from the trailing belt portion 92k at the time of fitting (in front of the paper surface in FIGS. 17 and 18), but is close to the tube end. The deformation of the inclined portion directly pressing against the tube end inner peripheral guide 22D in 91e extends to the subsequent band portion 92k, and the subsequent band portion 92k is inclined.

Fifth Embodiment
19 to 21 show a pipe manufacturing apparatus 3E according to a fifth embodiment of the present invention. As shown in FIG. 19, in the pipe making apparatus 3E, angle adjusting means 70 is provided at the same position as the pipe end outer peripheral guide 23 in the forward and backward direction LD (left and right in FIG. 19).
As shown in FIGS. 20 and 21, the angle adjustment means 70 includes an elevation mechanism 72 (height adjustment mechanism) and locking members 73 and 74. The lifting mechanism 72 includes a bolt and a linear motion mechanism, and is incorporated in the frame plate 25a. The locking members 73 and 74 are supported by the elevation mechanism 72 so as to be movable in the apparatus height direction HD. The inner peripheral locking member 73 and the outer peripheral locking member 74 can move up and down in the device height direction HD independently of each other.
The pipe end 91 e of the leading pipe portion 91 is sandwiched between the locking members 73 and 74. The locking members 73 and 74 are locked (engaged) to the tube end 91 e. The locking members 73 and 74 double as components of the tube end guide means 20 (restraint portion).

  Specifically, the inner locking member 73 includes a locking roller 73a and a shaft 73b. The shaft portion 73b protrudes from the frame plate 25a to the rear in the extension direction (right in FIG. 20). A locking roller 73a is rotatably provided at the tip of the shaft 73b. The locking roller 73a is applied from the inner peripheral side (upper side in FIG. 20) to the trailing band portion 92k or its vicinity. The width (axial length) of the locking roller 73a is sufficiently smaller than the width (axial length) of the roller-shaped tube end inner circumferential guide 22 (see FIG. 6).

The outer peripheral side locking member 74 is formed in a plate shape, and is disposed on the outer peripheral side (lower side in FIG. 20) of the pipe end 91e. The outer peripheral side locking member 74 is protruded from the frame plate 25a to the rear in the extending direction (right in FIG. 20). The protruding length (the dimension in the horizontal direction in FIG. 20) of the outer peripheral side locking member 74 is shorter than the axial length of the shaft portion 73b, but is not necessarily limited thereto.
The locking portion 23f of the tube end outer peripheral guide 23 is locked to the locking groove 95b in the one-round leading portion 91k or the vicinity thereof.

As shown in FIG. 20, at the time of pipe enlargement, the locking member 73 is slid to the bottom side (downward in FIG. 20) in the device height direction HD by the lifting mechanism 72, and the trailing belt portion is made by the locking roller 73a. Press down 92k. As a result, the trailing band width direction W _{92 k} is inclined toward the outer peripheral side (downward in FIG. 20) toward the extending front with respect to the leading band width direction W _{91 k} . As a result, the spiral pipe 9 can be expanded.

As shown in FIG. 21, when producing a reduced diameter pipe, the elevating members 72 slide the locking members 73 and 74 to the front side (upward in FIG. 21) in the device height direction HD, and the outer peripheral locking member 74 Push up on the trailing band 92k. As a result, the subsequent band width direction W _{92 k} is inclined to the inner peripheral side (downward in FIG. 21) toward the extending front with respect to the preceding band width direction W _{91 k} . As a result, the helical tube 9 can be reduced in diameter.
Note that, as shown in FIG. 19, the locking roller 73a and the outer peripheral locking member 74 are slightly separated from the trailing belt portion 92k at the time of fitting behind (progressive in FIG. 20 and FIG. 21). However, due to their proximity, the deformation of the inclined portion of the pipe end 91e by being directly pressed against the locking roller 73a or the outer peripheral locking member 74 extends to the trailing band portion 92k, and the trailing band portion 92k Is inclined.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.
For example, the pipe production apparatus of the present invention is not limited to a rehabilitating pipe along the inner circumference of the existing pipe 1, and can be applied to the production of various helical pipes 9. The pipe producing apparatus of the present invention is also applicable to the pipe producing apparatus for producing the spiral pipe 9 along the outer peripheral surface of a tubular body such as a columnar body. The helical tube 9 can also be manufactured in a free state without the outer circumferential restriction structure and the inner circumferential restriction structure.
In the case where the rigidity of the strip 90 is relatively high, the strip 90 alone can exert a force against the pushing of the trailing strip 92. In that case, the receiving portions 21b and 23b can be omitted.
You may provide the control lever 30 of 1st Embodiment also in pipe-making apparatus 3B-3E of other embodiment.
Also in the second to fifth embodiments (FIGS. 12 to 21), the tube may be manufactured in a state in which the portions 91k and 91j leading one round to several turns in the leading pipe portion 91 are lifted (see FIG. 10).
The cross-sectional shape of the strip member 90 is not limited to that of the embodiment. The strip member 90 may have a metal reinforcing strip separate from the resin strip body such as polyvinyl chloride. A metal reinforcing band may be joined to the outer peripheral portion of the resin-made band main body.

  The present invention can be applied to, for example, regeneration technology of old sewer pipes and other existing pipes.

WD Device width direction W _91k Leading band width direction W _{92k Trailing} band width direction ED Stretching direction LD Propulsion anteroposterior direction HD Device height direction VD In-pipe outward direction 1 Existing pipe 9 Modified pipe (helical pipe)
90 band member 91 leading tube portion 91e tube end portion 91k fitting one round leading portion 92 trailing band portion 92k fitting subsequent band portion 3, 3B to 3E tube making apparatus 3f apparatus frame 3a tube forming unit 10 drive means (drive unit )
20 tube end guide means (restraint part)
21 Front tube end guide 22 Rear tube end inner circumferential guide 22D Tapered tube end inner circumferential guide 23 Rear tube end outer circumferential guide 30 Operation lever (angle adjustment means)
40, 40A, 40B Strut members (angle adjustment means)
50 Angle adjustment means 70 Angle adjustment means 72 Lifting mechanism (height adjustment mechanism)

Claims (10)

It is a pipe making apparatus which spirals a belt-like member to produce a helical tube and which is propelled along the helical winding direction,
In a part of the circumferential direction of the end portion of the tip end side in the extending direction along the tube axis of the leading helical tube portion formed in advance in a helical shape in the strip member, the forward and backward direction of the leading helical tube portion is A device frame arranged along the winding direction;
A tube forming portion provided on the device frame, and fitting the edge of the trailing band portion of the unmade tube following the leading tube portion in the strip member with the corresponding edge of the portion preceding the one circumference of the leading tube portion;
Angle adjusting means for adjusting the angle of the trailing band width direction at the time of fitting of the trailing band portion relative to the leading band width direction at the time of fitting of the portion one round ahead;
A pipe manufacturing apparatus comprising: a pipe end portion, wherein the pipe is manufactured in a state in which a portion other than the part in the circumferential direction of the pipe end portion is released from the pipe manufacturing apparatus. The pipe making section has a constraining part configured to constrain the trailing band width direction along a device width direction orthogonal to a propelling front-rear direction of the pipe manufacturing frame;
The pipe manufacturing apparatus according to claim 1, wherein the apparatus width direction of the pipe manufacturing frame is angularly adjusted with respect to the leading band width direction by the angle adjusting means.   The pipe manufacturing apparatus according to claim 2, wherein the angle adjustment means includes an operation lever which can be gripped by being protruded from the apparatus frame.   The angle adjustment means is projected from the outside on one side or the other side in the apparatus width direction of the apparatus frame to the outside of the pipe outside direction of the inside of the preceding pipe part, and the inside of the outer peripheral regulating body surrounding the spiral pipe The pipe manufacturing apparatus according to claim 2 or 3, further comprising: a tension member that is in tension on the circumferential surface or the inner circumferential surface of the leading pipe portion. The pipe forming section has a constraining section that constrains the trailing band width direction to a variable constraining angle with respect to a device width direction orthogonal to the propelling front-rear direction of the pipe manufacturing frame,
The pipe manufacturing apparatus according to claim 1, wherein the angle of restraint by the restraint unit is angle-adjusted with respect to the apparatus width direction by the angle adjusting unit.   The tube forming portion is a pair of drive rollers that obliquely push the tube end portion across the trailing band portion, and a tube end guide means slidably engaged with the tube end portion in the winding direction The pipe production apparatus according to any one of claims 1 to 5, wherein the pipe end guide means includes the restraint portion. A method for producing a helical tube from a strip-shaped member, comprising
A step of fitting the edge of the trailing band portion of the non-produced pipe following the preceding helically formed pipe portion of the strip member by the pipe making device with the corresponding edge preceding the circumference of the leading pipe portion When,
A step of propelling the pipe-making apparatus along the spiral winding direction along with the fitting;
Adjusting the angle of the trailing band width direction, which is the width direction at the time of fitting of the trailing band portion, with respect to the leading band width direction, which is the width direction at the fitting of the one round preceding portion;
A pipe producing method, comprising: forming a pipe in a state in which a part other than the part where the pipe making apparatus is disposed in the circumferential direction of the pipe end is released from the pipe making apparatus. Constraining the trailing band width direction along a device width direction orthogonal to a propelling front-rear direction of the pipe manufacturing device by a restraining portion of the pipe manufacturing device;
The pipe manufacturing method according to claim 7, wherein in the angle adjusting step, the device width direction of the pipe manufacturing device is angularly adjusted with respect to the leading band width direction.   The pipe forming method according to claim 8, wherein the angle adjustment is performed by a control lever which is protruded from the pipe forming apparatus. The restraint section of the pipe making apparatus restrains the trailing band width direction at a variable constraining angle with respect to the apparatus width direction orthogonal to the forward and rearward direction of the pipe making apparatus.
The pipe making method according to claim 7, wherein in the angle adjusting step, the restraining angle by the restraining portion is adjusted.

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