JP6696872B2 - How to make a spiral tube - Google Patents

Description

  The present invention relates to a method for producing a spiral tube from a strip-shaped member using a pipe producing apparatus, and particularly to a method for unwinding and producing a spiral tube to a predetermined diameter in an initial stage of pipe production.

  It is known to rehabilitate existing sewer pipes and other existing pipes by lining them with rehabilitation pipes. For example, Patent Documents 1 and 2 and the like disclose an SPR (Spiral Pipe Renewal) method as an example of a rehabilitation method. While spirally winding the synthetic resin strip-shaped member along the inner wall of the existing pipe by using the pipe manufacturing device, in the strip-shaped member, the spiral pipe part and the succeeding strip part that are formed in a spiral tube in advance are provided. The edges adjacent to each other are joined by concave and convex fitting.

  At the initial stage of this method, it is necessary to carry out unwinding production. That is, the unwinding end of the strip-shaped member is assembled to the pipe manufacturing apparatus, and at least one or more turns are spirally wound from the unwinding end, and further the pipe manufacturing apparatus has a predetermined diameter so that it can be exactly wound around the annular molding frame of the pipe manufacturing apparatus. Drive. Usually, the belt-shaped member has the predetermined diameter in about 5 to 10 turns. The strip-shaped member from the unwinding end to the predetermined diameter is cut and removed.

Japanese Patent No. 4866428 International publication number WO2012 / 108434

Conventional unwinding production requires time because it is necessary to wind and cut the strip-shaped member for about 5 to 10 rounds. In particular, a highly rigid strip member puts a heavy burden on the operator and takes time. When working in a human hole, it may be necessary to perform a cutting operation as needed before the diameter becomes a predetermined value. In addition, it may be necessary to hit or clamp with a hammer, which is complicated.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a method of performing unwinding production in a simple and short time when forming a spiral tube from a strip-shaped member.

In order to solve the above-mentioned problems, the method of the present invention is a pipe manufacturing method in which a spiral pipe is formed by joining adjacent edges of the strip-shaped member adjacent to each other while winding the strip-shaped member in a spiral shape by a pipe manufacturing apparatus. There
After forming the spirally wound band portion to be unwound by spirally winding the band-shaped member one or more times from the unwinding end,
When one of the following strips following the spiral winding strip and one of the spiral winding strips is locked to the pipe making device, when the subsequent strip is locked, When the drive roller of the pipe manufacturing apparatus is normally rotated in the feeding direction of the succeeding strip portion and the spiral winding strip portion is locked, the driving roller is reversed in the opposite direction to the feeding direction. Characterize.

  When the succeeding strip is locked to the pipe making device and the drive roller is rotated in the normal direction, the succeeding strip is stopped by the locking, while the spiral winding strip is fed in the feeding direction (forward direction). The diameter of the spiral winding band is reduced. When the spiral winding strip is locked to the pipe making device and the drive roller is rotated in the reverse direction, the succeeding strip is returned to the spiral winding strip in the direction opposite to the feeding direction, so that the spiral winding strip is returned. Is reduced in diameter. The reduced diameter allows the spiral winding strip to be snugly wrapped around the annular molding frame to a predetermined diameter. As a result, the unwinding production can be completed easily and in a short time.

It is preferable that a locking member is provided on the one band portion and the locking member is abutted against the housing of the pipe manufacturing apparatus by the normal rotation or the reverse rotation.
When the locking member abuts the housing, one of the succeeding band portion and the spiral winding band portion can be locked to the housing via the locking member. It is particularly effective in the push-and-pull pipe manufacturing method and the traction pipe manufacturing method.

A locking jig is provided on the annular molding frame of the pipe manufacturing apparatus, a locking member is provided on the one band portion, and the locking member is abutted against the locking jig by the normal rotation or the reverse rotation. You can
When the locking member abuts on the locking receiving jig, one of the subsequent band portion and the spiral winding band portion can be locked to the annular molding frame via the locking receiving jig. This is particularly effective when using a pipe manufacturing apparatus that does not have a housing capable of locking the locking member, such as a self-propelled pipe manufacturing method.

It is preferable that the lock receiving jig also functions as a member for preventing the spiral winding band portion from coming off the annular molding frame.
The slip-off preventing member can prevent the spiral winding band portion from falling off the annular molding frame. Since the lock receiving jig also serves as the retaining member, the required number of jigs can be reduced and the jig installation work can be made efficient.

  According to the present invention, when forming a spiral tube from a strip-shaped member, unwinding and manufacturing can be performed easily and in a short time.

FIG. 1A is a cross-sectional view showing a state of unwinding production in a pipe manufacturing method using an original push type or traction type pipe manufacturing apparatus according to a first embodiment of the present invention. FIG. 1 (b) is a cross-sectional view showing an existing pipe that has been refurbished. FIG. 2 is a front view taken along the line II-II of FIG. 1, schematically showing the pipe manufacturing apparatus and the strip-shaped member at the stage where the locking member is installed in the subsequent strip in the unwinding method by the normal rotation method. .. FIG. 3 is a perspective view schematically showing the pipe manufacturing apparatus and the belt-shaped member at the stage of installing the locking member. FIG. 4 is a sectional view of the strip-shaped member taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view of the strip-shaped member and the pipe manufacturing apparatus taken along the line VV of FIG. FIG. 6 is a front view schematically showing the pipe manufacturing apparatus and the belt-shaped member at the stage when the locking member hits the housing of the pipe manufacturing apparatus in the unwinding method by the normal rotation method. FIG. 7: is a front view which shows typically the pipe manufacturing apparatus and the strip | belt-shaped member in the completion stage of the unwinding method by the said normal rotation system. FIG. 8: is a front view which shows typically the pipe manufacturing apparatus and the strip | belt-shaped member in the stage which installed the locking member in the spiral winding strip part in the unwinding method by a reversal system. FIG. 9 is a perspective view schematically showing the pipe manufacturing apparatus and the strip-shaped member at the stage of installing the locking member in the unwinding method by the reverse rotation method. FIG. 10 is a front view schematically showing the pipe manufacturing apparatus and the belt-shaped member at the stage when the locking member hits the housing of the pipe manufacturing apparatus in the unwinding method by the reverse rotation method. FIG. 11: is a front view which shows typically the pipe manufacturing apparatus and the strip | belt-shaped member in the completion stage of the unwinding method by the said inversion system. FIG. 12 shows a pipe manufacturing method at a stage where a locking member is installed in a spiral winding band portion in a rewinding method by a reversing method in a pipe manufacturing method using a self-propelled pipe manufacturing apparatus according to a second embodiment of the present invention. It is a front view which shows a device and a strip | belt-shaped member typically. FIG. 13 is a sectional view taken along line XIII-XIII in FIG. FIG. 14 is a front view schematically showing the pipe manufacturing apparatus and the belt-shaped member at the stage when the locking member hits the retaining member and the locking receiving jig in the unwinding method of the second embodiment. FIG. 15: is a front view which shows typically the pipe manufacturing apparatus and the strip | belt-shaped member in the completion stage of the unwinding method in the said 2nd Embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 (a) shows a state in which an old pipe 3 that has deteriorated is rehabilitated. Examples of the existing pipe 3 include a sewer pipe, a water pipe, an agricultural water pipe, and a gas pipe. As shown in FIG. 1B, the rehabilitation pipe 9 (spiral pipe) is lined on the inner wall of the existing pipe 3 by rehabilitation. The rehabilitation pipe 9 is provided over the entire length of the existing pipe 3 between the starting man hole 4 and the reaching man hole 4B. The rehabilitation pipe 9 is composed of one long strip-shaped member 90 and has a spiral tube shape. The belt-shaped member 90 is spirally wound, and the edges adjacent to each other by one turn are joined together.

  As shown in FIG. 3, the belt-shaped member 90 includes a belt main body 93 and a reinforcing belt member 94. The band body 93 is made of synthetic resin such as polyvinyl chloride. A reinforcing band member 94 is provided at the central portion in the width direction of the outer surface (the surface facing the inner surface of the existing pipe 3) of the band body 93. The reinforcement strip 94 is made of metal such as steel. A first fitting portion 95 having a convex shape is formed on one edge in the width direction of the belt-shaped member 90, and a second fitting portion 96 having a concave shape is formed on an edge on the other side. As shown in FIG. 5, the fitting portions 95 and 96 at the edges of the spirally formed belt-shaped member 90 that are opposed to each other in a circumferential direction are fitted in a concavo-convex shape.

  As shown in FIG. 1A, the pipe manufacturing apparatus 1 is arranged at the bottom of the starter hole 4. The retreading pipe 9 is produced from the strip-shaped member 90 by the pipe producing apparatus 1. As shown in FIG. 2, the pipe manufacturing apparatus 1 includes a housing 10, a drive motor 20, a pair of drive rollers 21 and 22, and an annular molding frame 30. The drive motors 20 rotate the drive rollers 21 and 22. As shown in FIG. 3, the inner drive roller 21 and the outer drive roller 22 face each other in parallel. As shown in FIG. 5, a roller gap 23 is formed between these drive rollers 21 and 22. The roller gap 23 includes a preceding inter-roller portion 23a on one side (right side in FIG. 5) and a succeeding inter-roller portion 23b on the other side (left side in FIG. 4) in the axial direction of the drive rollers 21 and 22. The drive motor 20 and the drive rollers 21 and 22 are held by the housing 10. The housing 10 includes a gear box 11 and a frame 12, as shown in a simplified manner by a chain double-dashed line in FIG. 5. Although detailed illustration is omitted, the gear box 11 accommodates a gear group that connects the drive motor 20 and the drive rollers 21 and 22 so that torque can be transmitted. The outer drive roller 22 is housed in the frame body 12.

  As shown in FIG. 2, the annular molding frame 30 has a plurality of guide rollers 33 and a connecting plate 32. The guide rollers 33 are arranged in a ring shape. Adjacent guide rollers 33 are connected to each other via a connecting plate 32. The diameter of the annular molding frame 30 is matched to the diameter of the rehabilitation pipe 9 to be manufactured. Both ends of the annular molding frame 30 in the circumferential direction are joined to the housing 10. The inner drive roller 21 is arranged between the both ends of the annular molding frame 30. The frame body 12 and the outer drive roller 22 are arranged radially outside the annular molding frame 30.

A method of manufacturing the rehabilitation pipe 9 from the strip-shaped member 90 using the pipe manufacturing apparatus 1 will be described focusing on a method of unwinding the strip-shaped member 90 in the initial stage.
Equipment such as the pipe manufacturing apparatus 1 is disassembled, and is lowered inside from the ground opening of the starter hole 4 and assembled in the starter hole 4. Thereby, as shown in FIG. 1A, the pipe manufacturing apparatus 1 is installed in the starting hole 4. Unwinding work is performed in the starter hole 4.
If the above-ground opening is large enough to allow the pipe manufacturing device 1 to be taken in and out with the pipe manufacturing device 1 assembled, the pipe manufacturing device 1 may be unloaded into the manhole 4 after the unwinding work is performed on the ground. ..
In FIG. 1A, the pipe forming apparatus 1 at the time of unwinding is in a state in which the annular molding frame 30 is vertically erected, but even if the annular molding frame 30 is horizontally laid down. Good. In order to make the annular molding frame 30 in a vertical state, the pipe manufacturing apparatus 1 is suspended and supported by, for example, a suspension device (not shown).
It is preferable that the reinforcing strip 94 in a certain length region from the unwinding end 90e of the strip 90 be cut at appropriate intervals to facilitate bending.

There are a forward rotation type and a reverse rotation type as an unwinding method. The details of the forward rotation type are as follows.
<Forward unwinding method>
First, the unwinding end 90e is passed through the inter-subsequent roller portion 23b of the roller gap 23. Further, as shown in FIG. 3, the strip-shaped member 90 for one round is wound around the winding end 90e along the ring-shaped molding frame 30 in a ring shape, and the winding end 90e is passed through the roller gap 23 again. At this time, the unwinding end 90e is passed through the inter-preceding roller portion 23a. The part different from the unwinding end 90e by one round is passed through the part between the following rollers 23b. And the 1st fitting part 95 of the unwinding end 90e is fitted in the 2nd fitting part 96 which differs by one circumference. As a result, the spiral winding band portion 91 is formed. As shown in FIG. 2, the spiral winding band portion 91 at this stage has a larger diameter than the annular molding frame 30. As shown in FIG. 3 and FIG. 5, in the spiral winding band portion 91, the portion in the preceding inter-roller portion 23a becomes the leading side driving force receiving portion 91a, and the portion in the following inter-roller portion 23b is The rear driving force receiving portion 91b.

  Next, as shown in FIGS. 2 and 3, the locking member 5 is provided on the succeeding strip portion 92 (one strip portion) following the spiral winding strip portion 91. A tool such as Shino can be used as the locking member 5. The leading end of the locking member 5 is urged against the reinforcing strip 94 of the succeeding strip 92 to be fixed.

  Next, as shown in FIG. 6, the drive rollers 21 and 22 are normally driven in the forward direction (the direction in which the succeeding strip portion 92 is fed). As a result, the succeeding strip portion 92 is moved toward the inter-subsequent roller portion 23b of the roller gap 23. Eventually, the locking member 5 abuts on the frame 12 of the housing 10 and is locked.

  As shown in FIG. 7, the drive rollers 21 and 22 are further rotated in the forward direction. At this time, since the succeeding belt portion 92 is locked to the housing 10 via the locking member 5, the feeding into the roller gap 23 is stopped. Therefore, the trailing side driving force receiving portion 91b (FIG. 5) in the spiral winding band portion 91 is also stopped. On the other hand, the leading side driving force receiving portion 91a (FIG. 5) of the spiral winding band portion 91 is fed in the feeding direction (clockwise direction in FIG. 7) by the driving of the driving rollers 21 and 22. At this time, the first fitting portion 95 of the leading driving force receiving portion 91a slides with respect to the second fitting portion 96 of the trailing driving force receiving portion 91b. As a result, the diameter of the spiral winding band portion 91 is reduced until it is exactly wound around the annular molding frame 30, and a predetermined diameter is obtained. In this way, the unwinding production can be completed easily and in a short time.

  Then, the locking member 5 is removed. Then, the drive rollers 21 and 22 are normally rotated. As a result, the rehabilitation pipe 9 is gradually inserted into the existing pipe 3 while being manufactured (pushing method). By carrying out the unwinding production, the rehabilitation pipe 9 can be stably produced with a constant diameter. As shown by the chain double-dashed line in FIG. 1 (a), the tow rope 8 is connected to the tip of the rehabilitation pipe 9 from the reaching person hole 4B side, and the rehabilitating tube 9 is towed to the reaching person hole 4B side. May be (traction method).

<Reverse type unwinding method>
8 to 11 show a reversing-type unwinding method. As shown in FIGS. 8 and 9, in the reversing type unwinding method, the strip-shaped member 90 is passed from the unwinding end 90e through the roller gap 23, and is wound one or more times to form the spirally wound band portion 91. It is the same as the normal rotation type.
In the reverse rotation type, the locking member 5 is provided between the leading side driving force receiving portion 91a and the unwinding end 90e in the spiral winding band portion 91 (one band portion).
Next, as shown in FIG. 10, the drive rollers 21 and 22 are rotationally driven in the opposite direction (opposite to the feeding direction of the succeeding strip 92). As a result, the unwinding end 90e is returned to the housing 10 side. The succeeding strip portion 92 is also returned to the side opposite to the feeding direction. Eventually, the locking member 5 hits the housing 10 and is locked.

As shown in FIG. 11, the drive rollers 21 and 22 are further driven in the reverse direction. At this time, the leading driving force receiving portion 91a (see FIG. 5) is stopped by the locking of the locking member 5. On the other hand, the trailing side driving force receiving portion 91b (see FIG. 5) is returned to the side opposite to the feeding direction, that is, the trailing belt portion 92 side (left side in FIG. 11). The second fitting portion 96 of the trailing side driving force receiving portion 91b slides with respect to the first fitting portion 95 of the leading side driving force receiving portion 91a.
As a result, the spiral winding band portion 91 can be reduced in diameter and can be exactly wound around the annular molding frame 30 to have a predetermined diameter, so that the unwinding production can be completed easily and in a short time.
As described above, according to the embodiment of the present invention, unwinding can be produced in a short time by forcibly fixing one of the succeeding strip portion 92 and the spiral winding strip portion 91. Since no large-scale device or jig is required and the construction time can be shortened, the construction can be carried out at low cost.

  Then, the locking member 5 is removed. Then, the drive rollers 21 and 22 are rotationally driven in the normal direction to gradually manufacture the rehabilitating pipe 9 and insert the rehabilitating pipe 9 into the existing pipe 3 by the original pushing method or the pulling method.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals will be given to the drawings for the configurations that are the same as the configurations described above and the description thereof will be omitted.
[Second Embodiment]
12 to 15 show a second embodiment of the present invention. The pipe manufacturing apparatus 1B of the second embodiment is self-propelled. That is, the pipe manufacturing apparatus 1 </ b> B is moved along the inner wall of the existing pipe 3 in the winding direction of the rehabilitating pipe 9 as the pipe manufacturing of the rehabilitating pipe 9 progresses. The frame body 12 is not provided in the self-propelled pipe manufacturing apparatus 1B. That is, there is no element capable of directly locking the locking member 5.

  As shown in FIG. 12, in the unwinding operation of the second embodiment, after the band-shaped member 90 is passed from the unwinding end 90e through the roller gap 23 and wound once or more to form the spirally wound band portion 91, A plurality of retaining members 50 are provided in the pipe manufacturing apparatus 1B. These retaining members 50 are arranged at intervals in the circumferential direction of the annular molding frame 30.

As shown in FIG. 13, the retaining member 50 has a pair of column portions 51 and a bridging portion 52. A pair of support columns 51 are attached to both ends of the annular molding frame 30 in the width direction (left and right in FIG. 13, and the direction orthogonal to the paper surface in FIG. 12). The column portion 51 projects outward in the radial direction of the annular molding frame 30 (upward in FIG. 13). A bridging portion 52 is bridged between these pillar portions 51. The bridging portion 52 is fixed so that the position of the bridging portion 52 can be adjusted along the longitudinal direction of the column portion 51 (up and down in FIG. 13). Moreover, the bridging portion 52 is arranged on the radially outer side (upper side in FIG. 13) of the spirally wound band portion 91. The spiral winding band portion 91 is passed through a rectangular frame formed by the guide roller 33 of the annular molding frame 30, the bridging portion 52, and the pair of column portions 51. As a result, the spiral winding band portion 91 is prevented from falling off the annular molding frame 30.
In the pipe manufacturing apparatus 1B, the succeeding strip portion 92 is introduced into the roller gap 23 through the inside of the spiral winding strip portion 91.

<Reverse type unwinding method>
As shown in FIG. 12 and FIG. 13, when the reversing type unwinding is performed in the pipe manufacturing apparatus 1B, the retaining member 50A (lock receiving jig) on the unwinding end 90e side of the housing 10 and the unwinding end. The locking member 5 is provided on the spiral winding band portion 91 between 90 e.
Next, as shown in FIG. 14, the drive rollers 21 and 22 are rotationally driven in the opposite direction (opposite to the direction in which the succeeding strip portion 92 is fed into the spiral winding strip portion 91). As a result, the unwinding end 90e is returned to the housing 10 side. The succeeding strip portion 92 is also returned to the side opposite to the feeding direction. Eventually, the locking member 5 abuts on the bridging portion 52 of the slip-off preventing member 50A and is locked. As a result, the unwinding end 90e and thus the leading-side driving force receiving portion 91a (see FIG. 5) can be locked to the annular molding frame 30 via the locking member 5 and the retaining member 50A.
That is, in the second embodiment, the detachment preventing member 50A from the annular molding frame 30 of the spiral wound band portion 91 also serves as a locking receiving jig for receiving the locking member 5. As a result, the required number of jigs can be reduced and the jig installation work can be made efficient.

As shown in FIG. 15, the drive rollers 21 and 22 are further driven to rotate in the reverse direction. As a result, the leading-side driving force receiving portion 91a (see FIG. 5) is stopped by the locking, while the trailing-side driving force receiving portion 91b (see FIG. 5) is opposite to the feeding direction, that is, the trailing belt portion. It is returned to the side 92 (left side in FIG. 15). The second fitting portion 96 of the trailing side driving force receiving portion 91b slides with respect to the first fitting portion 95 of the leading side driving force receiving portion 91a.
As a result, the spiral winding band portion 91 can be reduced in diameter and can be exactly wound around the annular molding frame 30 to have a predetermined diameter. In this way, the unwinding production can be completed easily and in a short time.

  After that, the locking member 5 and the retaining member 50 are removed. Then, the driving rollers 21, 22 are rotationally driven in the forward rotation direction to spirally move the self-propelled pipe manufacturing apparatus 1B along the inner wall of the existing pipe 3 to manufacture the rehabilitation pipe 9. ..

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, also in the first embodiment, the retaining member 50 is provided on the annular molding frame 30 and the like of the pipe manufacturing apparatus 1, and the locking member 5 provided on the spiral winding belt portion 91 or the succeeding belt portion 92 is retained. The spiral winding band portion 91 may be unrolled by being indirectly locked to the pipe manufacturing apparatus 1 via 50.
Also in the second embodiment, the locking member 5 is provided on the succeeding belt portion 92, and the drive rollers 21 and 22 are rotated in the normal direction, so that the locking member 5 is directly attached to the pipe manufacturing apparatus 1B or via the retaining member 50. By indirectly locking, the spiral winding band portion 91 may be reduced in diameter and unwound.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a technique for rehabilitating an existing pipe such as an aged sewer pipe, a water pipe, an agricultural water pipe, and a gas pipe by using a spiral rehabilitation pipe.

1,1B Pipe making device 5 Locking member 9 Rehabilitation pipe (spiral pipe)
10 housing
21 Inner drive roller (drive roller)
22 Outer drive roller (drive roller)
30 Annular molding frame 50A Detachment prevention member (lock receiving jig)
90 band-shaped member 90e unwinding end 91 spirally wound band 92 subsequent band

Claims (4)

A pipe manufacturing method for forming a spiral pipe by joining edges of the belt-shaped member adjacent to each other while winding the belt-shaped member in a spiral shape by a pipe manufacturing device,
After forming the spirally wound band portion to be unwound by spirally winding the band-shaped member one or more times from the unwinding end,
When one of the following strips following the spiral winding strip and one of the spiral winding strips is locked to the pipe making device, when the subsequent strip is locked, When the drive roller of the pipe manufacturing apparatus is normally rotated in the feeding direction of the succeeding strip portion and the spiral winding strip portion is locked, the driving roller is reversed in the opposite direction to the feeding direction. Characteristic spiral tube manufacturing method.   The pipe manufacturing method according to claim 1, wherein a locking member is provided on the one belt portion, and the locking member is abutted against the housing of the pipe manufacturing apparatus by the normal rotation or the reverse rotation.   A locking jig is provided on the annular molding frame of the pipe manufacturing apparatus, a locking member is provided on the one band portion, and the locking member is abutted against the locking jig by the normal rotation or the reverse rotation. The pipe manufacturing method according to claim 1.   The pipe manufacturing method according to claim 3, wherein the locking receiving jig also serves as a member for preventing the spiral winding band portion from coming off the annular molding frame.

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