JP7071863B2 - Pipe making method and seam member - Google Patents

Description

The present invention relates to a method for producing a spiral tube from a strip-shaped member and a seam member, and particularly to a method for producing a spiral tube while adding a plurality of strip-shaped members and a seam member used in the method.

A method of spirally winding a band-shaped member (profile) along the inner peripheral surface of an existing pipe such as an aged sewer pipe to make a rehabilitated pipe made of a spiral pipe, and thereby rehabilitating the existing pipe is known. Is. If the length of the band-shaped member is insufficient, a new band-shaped member is added.
As a method of adding, for example, a joint is provided so as to straddle between the steel reinforcing strips of the two strip-shaped members, and the joint and each reinforcing strip are joined by rivets or welding (Patent Document 1). Alternatively, for one band-shaped member, the reinforcing band material is projected in the band length direction from the resin main band material, and for the other band-shaped member, the reinforcing band material is retracted in the band length direction from the main band material. The two strip-shaped members are joined by inserting the protruding reinforcing strip into the recessed portion (FIG. 6 of Patent Document 2).
The resin main strips of the two strips are abutted against each other and welded with resin. Alternatively, a gap is provided between the two main strips, the gap and the peripheral portion thereof are covered with a backing plate, and the backing plate is resin-welded to the main strip (FIG. 8 of Patent Document 2).

Japanese Unexamined Patent Publication No. 08-296767 Japanese Patent No. 3396410 (FIGS. 6 and 8)

The backing plate (seam member) in Patent Document 2 described above is joined to the strip-shaped member only by welding. Therefore, the position is not stable at the unwelded stage, and the welding work is not easy. Especially at the construction site of the rehabilitation pipe, the seam may be arranged on the upper side or the side part of the inner circumference of the rehabilitation pipe, and it is difficult to weld. In addition, it is necessary to secure the joint strength only by welding.
In view of such circumstances, it is an object of the present invention to facilitate the joining work of the seam members arranged at the seams in the spiral pipe manufactured while adding a plurality of strip-shaped members, and to further secure the joining strength. do.

In order to solve the above-mentioned problems, the method of the present invention is a pipe making method for forming a spiral tube by spirally winding a plurality of strip-shaped members while adding them in the strip length direction.
A seam space is provided between the end faces of the resin main band members that define the inner peripheral surface of the spiral tube in the two strip-shaped members to be connected, and the seam member is provided from the pipe inner space side of the spiral tube to the seam space. It is characterized in that it is fitted and temporarily fixed to join the seam member and the main band member.
According to this method, by fitting the seam member into the seam space and temporarily fixing the seam member, the seam member can be prevented from falling out of the seam space, and joining work such as welding is performed with the position of the seam member stabilized. be able to. Further, the joint strength of the seam member can be ensured not only by welding but also by fitting or temporary fixing. Sealing properties such as water stopping can be ensured by welding or the like.

At the time of fitting, it is preferable that the temporary fixing portion provided on the outer peripheral side portion of the seam member is locked to the locking portion facing the back of the seam space in any of the strip-shaped members.
As a result, it is possible to surely prevent the seam member from falling off from the seam space during the joining work such as welding, and the joining work can be facilitated. The strip-shaped member is preferably one of the two strip-shaped members to be connected.
The “outer peripheral side portion of the seam member” refers to a side portion facing the outer peripheral side of the spiral pipe with the seam member installed in the seam space.
"The back of the seam space" refers to the position on the outer peripheral side of the spiral pipe with respect to the opening of the seam space into the spiral pipe, and if it is the outer peripheral side, the side of the spiral pipe in the circumferential direction or the pipe with respect to the opening. The position may be shifted laterally in the axial direction.

It is preferable to remove the portion that hinders the fitting from the space side in the pipe from the band end material having the same cross section as the main band material, and use the band end material after removal as the seam member.
This allows the seam member to be easily fitted into the seam.

The boundary between the end edge along the winding direction and the main band member in the face plate portion of the seam member facing the inner space of the spiral tube, and the side edge and the main of the face plate portion intersecting the winding direction. It is preferable that the welding target portion including the boundary with the band material is resin-welded, and the length of the resin-welded portion along the winding direction is equal to or longer than the length of the edge.
As a result, the seam member can be reliably welded, and sealing properties such as water stopping can be ensured.

Further, the present invention is a seam member provided at a seam of a plurality of band-shaped members which are spirally wound to form a spiral tube while being added in the band length direction.
With the face plate portion that is fitted into the seam space formed between the end faces of the resin main strips in the two strips to be connected and joined to the main strip, and faces the in-pipe space of the spiral tube. ,
It is characterized by including a temporary fixing portion provided on the outer peripheral side portion of the face plate portion and locked to a locking portion facing the back of the seam space in any of the strip-shaped members.
According to the seam member, the joining work such as welding can be facilitated and the joining strength can be ensured by locking to the strip-shaped member.

It is preferable that the inner peripheral side surface of the face plate portion is substantially flush with the inner peripheral side surface of the main band material to define a part of the inner peripheral surface of the spiral tube.
This makes it possible to prevent a step from being formed between the seam member and the main band member.

It is preferable to have a cross-sectional shape of the main strip, excluding a portion that hinders fitting into the seam space from the inner space side of the spiral tube.
This allows the seam member to be easily fitted into the seam.

It is preferable that the seam member is made of an elastically deformable resin.
Even if the seam space and the shape of the seam member do not match to some extent, the seam member can be reliably fitted into the seam space by elastically deforming the seam member. Further, the seam member can be temporarily fixed by elastically deforming the temporary fixing portion and locking the temporary fixing portion to the locking portion of the band-shaped member.

It is preferable that the seam member is made of the same type of resin as the main band material.
By doing so, there is no difference in the physical property values between the seam member and the main band member. Therefore, for example, it is possible to suppress the generation of thermal stress by matching the degree of expansion and contraction with respect to a temperature change. In addition, since the chemical resistance is the same, common measures can be taken.

According to the present invention, in a spiral pipe produced while a plurality of strip-shaped members are added, it is possible to facilitate the joining work of the seam members arranged at the seams and further secure the joining strength.

FIG. 1 shows a joint portion on the inner peripheral surface of a rehabilitated pipe (spiral pipe) made along the inner circumference of an existing pipe by the pipe making method according to the first embodiment of the present invention, and is shown in FIG. 7 (a). It is an enlarged front view of the circle part I of. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6A is a cross-sectional view of a seam member provided at the seam portion. FIG. 6B is a perspective view of the seam member. FIG. 7A is a cross-sectional view of an existing pipe rehabilitated by the rehabilitation pipe. FIG. 7B is a perspective view of a part of the rehabilitation tube. FIG. 8 is a front view showing a joint portion on the inner peripheral surface of a rehabilitated pipe (spiral pipe) made along the inner circumference of an existing pipe by the pipe making method according to the second embodiment of the present invention. FIG. 9 is a front view showing a joint portion on the inner peripheral surface of a rehabilitated pipe (spiral pipe) made along the inner circumference of an existing pipe by the pipe making method according to the third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
As shown in FIG. 7A, the existing pipe 1 is rehabilitated by lining the rehabilitation pipe 2 (spiral pipe) on the inner surface of the existing pipe 1 such as an aged sewer pipe. Examples of the existing pipe 1 include sewer pipes, water pipes, agricultural water pipes, hydroelectric power transmission pipes, gas pipes, and the like.

As shown in FIG. 7B, the rehabilitation tube 2 is formed by a plurality of strip-shaped members 3 (profiles). A plurality of strip-shaped members 3 are added in the strip length direction and spirally wound along the inner circumference of the existing pipe 1 to form a rehabilitation pipe 2.

As shown in FIG. 4, each strip-shaped member 3 includes a main strip 10 and a reinforcing strip 20. The material of the main band material 10 is a resin such as polyvinyl chloride. The material of the reinforcing strip 20 is a metal such as steel.

The main band member 10 has a flat band portion 11, fitting portions 13, 14 and ribs 15 and 16 integrally, and extends in the direction orthogonal to the paper surface in the figure. The flat band portion 11 is formed in a flat band shape. The flat band portion 11 defines the smooth inner peripheral surface 2a of the rehabilitation tube 2, and thus the inner space 2c of the rehabilitation tube 2.

At one end of the flat band portion 11 in the band width direction, a concave first fitting portion 13 is provided when viewed from the inner peripheral side (lower side in FIG. 4). At the other end of the flat band portion 11 in the band width direction, a convex second fitting portion 14 projecting toward the outer peripheral side (upper side in the figure) is provided.
The rib 15 protrudes from the first fitting portion 13 toward the outer peripheral side. The rib 16 projects from the portion of the flat band portion 11 near the second fitting portion 14 toward the outer peripheral side. An L-shaped sublock locking portion 16b is formed at the tip of the rib 16.
Further, the subblock piece 17 extends diagonally from the first fitting portion 13 toward the outside and the outer peripheral side in the band width direction.

As shown in FIG. 4, a reinforcing band member 20 is provided on the outer peripheral side (upper side in the figure) of the flat band portion 11 between the ribs 15 and 16. The reinforcing strip 20 has a body portion 21, a pair of shoulder portions 22, and a pair of arm portions 23, and has a substantially W-shaped cross section and extends in a direction orthogonal to the paper surface of FIG. Shoulders 22 are connected to both ends of the body portion 21 having a U-shaped cross section. The shoulder portion 22 is addressed to the flat band portion 11, and the arm portion 23 extends diagonally from each shoulder portion 22 toward the outside and the outer peripheral side in the band width direction. The tip of the arm 23 is locked to the ribs 15 and 16.
The cross-sectional shape of the illustrated strip-shaped member 10 is an example, and the strip-shaped member of the present invention is not limited to the one shown in the cross-sectional shape, and various forms can be applied.

As shown in FIG. 4, in the rehabilitation tube 2 manufactured in a spiral tubular shape, the portions of the first fitting portion 13 and the second fitting portion 14 that are offset from each other by one circle are fitted so as to face each other. Further, the sublock pieces 17 and the sublock locking portions 16b are locked to each other so as to be offset from each other.

Further, in the rehabilitation pipe 2, as described above, two or more (plural) strip-shaped members 3 are connected in a row along the strip length direction or the winding direction. As shown in FIGS. 1 and 5, a connecting member 30 and a seam member 40 are provided at a connecting portion between the two strip-shaped members 3.

As shown in FIGS. 2 and 3, the connecting member 30 is formed in a U-shaped cross section and extends in the band length direction of the band-shaped member 2 or in the winding direction of the rehabilitation tube 2 (spiral tube). The material of the connecting member 30 is a metal such as steel. As shown in FIG. 5, the connecting member 30 is bridged between the two strip-shaped members 3. Both ends of the connecting member 30 are inserted into the inside of the body portion 21 of the reinforcing strip 20 of the corresponding strip-shaped member 3, and are fixed to the reinforcing strip 20 by screws 35.
The shape of the connecting member 30 is not limited to the U-shaped cross section, but may be a square cylinder, a plate, an L-shaped cross section, an H-shaped cross section, or the like. The material of the connecting member 30 is not limited to metal, but may be hard resin or the like. The fixing means of the connecting member 30 and the reinforcing strip 20 is not limited to the screw 35, and may be welding or an adhesive.

As shown in FIGS. 1 and 5, the end faces 10e of the main strips 10 of the two strips 3 facing each other face each other at intervals. A seam space 2s is provided between these end faces 10e.
The seam member 40 is fitted in the seam space 2s.
The material of the seam member 40 is a resin, preferably a resin that is elastically deformable. More preferably, the seam member 40 is made of the same type of resin as the main band material 11, that is, polyvinyl chloride.

As shown in FIG. 6, the seam member 40 has a cross-sectional shape in which a part of the main band member 11 is omitted. Specifically, as shown in the solid line of FIG. 6 (a) and FIG. 6 (b), the seam member 40 includes a face plate portion 41, a first temporary fixing portion 43, a second temporary fixing portion 44, and a rib 46. Have.

As shown in FIGS. 5 and 6, the face plate portion 41 is formed in a rectangular flat plate shape, and is arranged substantially flush with the flat strip portion 11 of the two main strips 10. In particular, the inner peripheral side surface 41a of the face plate portion 41 is substantially flush with the inner peripheral side surface (lower surface in FIG. 5) of the two flat band portions 11. The inner peripheral side surface 41a of the face plate portion 41 faces the inner peripheral space 2c of the rehabilitation tube 2, and defines a part of the inner peripheral surface 2a of the rehabilitation tube 2. As shown in FIG. 3, an end portion (lower end portion in FIG. 3) on the inner peripheral side of the connecting member 30 is in contact with or in close proximity to the outer peripheral side surface 41b of the face plate portion 41. The connecting member 30 restricts the seam member 40 from being displaced toward the back side of the seam space 2s, that is, the outer peripheral side (upper side in FIG. 3) of the rehabilitation pipe 2. In addition to the role of connecting the adjacent reinforcing strips 20, the connecting member 30 also has a role of supporting or restricting the position of the seam member 40 from the back side of the seam space 2s.

As shown in FIG. 6, at one end in the width direction of the face plate portion 41 (the left end portion in FIG. 6A), a concave first temporary fixing portion 43 is provided when viewed from the inner peripheral side (lower side in the figure). It is provided. At the other end of the face plate portion 41 in the width direction (right end portion in the figure), a convex second temporary fixing portion 44 projecting to the outer peripheral side (upper side in the figure) is provided. The rib 46 protrudes from the portion of the face plate portion 41 near the second temporary fixing portion 44 toward the outer peripheral side.

As shown in FIG. 3, the temporary fixing portion 43 is provided on the outer periphery of the portion (locking portion 14B) facing the back of the seam space 2s in the second fitting portion 14 of the strip-shaped member 3 on one side (left side in the figure). It fits.
The temporary fixing portion 44 is inserted into a portion (locking portion 13B) facing the back of the seam space 2s in the first fitting portion 13 of the other strip-shaped member 3 (on the right side in the figure). The tip of the subblock piece 17 of the other strip-shaped member 3 is in contact with the rib 46.

Comparing the cross-sectional shapes of the seam member 40 and the main band member 11, the seam member 40 has a portion 41, which corresponds to a flat band portion 11, a fitting portion 13, 14 and a part of the rib 16 in the main band member 11, respectively. While having 43, 44, 46, it does not have a portion corresponding to the rib 15, the subblock piece 17, and the subblock locking portion 16b in the main strip 11. In short, assuming that the seam member 40 is fitted into the seam space 2s from the pipe inner space 2c side, the fitting obstruction portion 15 of the cross-sectional shape of the main strip 11 that hinders the fitting from the pipe inner space 2c side. , 17, 16b are omitted in the cross-sectional shape.

As shown in FIG. 1, the seam member 40 is joined to the main strip 11 by resin welding. A resin welded portion 50 is formed between the seam member 40 and the main strip 11. Polyvinyl chloride is preferably used as the material of the welded material of the resin welded portion 50.

The resin welded portion 50 includes a pair of winding direction resin welded portions 51 and a pair of band width direction resin welded portions 52. The winding direction resin welded portion 51 is provided along the boundary between the end edge 41d along the winding direction of the face plate portion 41 and the main band member 10, and is provided in the winding direction of the strip-shaped member 3 (vertical direction in FIG. 1). It is extended. Further, the winding direction resin welded portion 51 extends from the seam member 40 to both sides in the winding direction. The length of the winding direction resin welded portion 51 is larger than the length of the edge 41d.
Both ends of the winding direction resin welded portion 51 may be exactly the same as both ends of the end edge 41d of the face plate portion 41. The length of the winding direction resin welded portion 51 may be longer than the length of the edge 41d.

The band width direction resin welded portion 52 is provided at the boundary between the side edge 41e orthogonal (intersecting) with the end edge 41d of the face plate portion 41 and the main band member 10, and is provided in the band width direction orthogonal to (intersecting) the winding direction (intersection). It extends to the left and right in FIG. Both ends of the band width direction resin welded portion 52 intersect with the winding direction resin welded portion 51.

The rehabilitation tube 2 is manufactured as follows.
A strip-shaped member 3 wound around a drum (not shown) is unwound, inserted into a manhole 4 (FIG. 7 (a)) from the ground, and introduced into a pipe making machine (not shown). By fitting the fitting portions 13 and 14 together while spirally winding the strip-shaped member 3 by the pipe making machine, the spiral tubular rehabilitation pipe 2 is made along the inner peripheral surface of the existing pipe 1.

In the present invention, in order to line the rehabilitation pipe 2 over the entire length of the existing pipe 1, since the length of the strip-shaped member 3 is not enough, the strip-shaped member 3 is added. Specifically, the end portion of the preceding strip-shaped member 3 in the winding direction and the starting end portion of the succeeding strip-shaped member 3 in the winding direction are cut with a jigsaw, a sander, or other tools, respectively, to form these end faces 10e. Arrange so that the plane is orthogonal to the band length direction. Then, the connecting member 30 is bridged between the reinforcing strips 20 of the two strip-shaped members 3 before and after, and both ends of the connecting member 30 and each reinforcing strip 20 are screwed together (FIG. 5). Preferably, the head of the screw 35 is shaved so that the head of the screw 35 does not get caught in the pinch roller or the like of the pipe making machine.

A seam space 2s is set between the main strips 10 of the two strips 3. That is, it is not necessary to exactly abut the two main strips 10 against each other, and the connection work can be facilitated.
Preferably, when the connecting portion between the strip-shaped members 3 passes through the pipe making machine, the pipe making machine is operated at a low speed so that the connection is not disconnected.

As shown in FIG. 6B, a seam member 40 is separately prepared. The seam member 40 is manufactured as follows.
As shown in FIG. 6A, the end portion of the main strip member 10 of 1 is cut to cut out the strip end member 19. The band end material 19 at the time of cutting has the same cross section as the main band material 10. The dimension of the strip end material 19 along the strip length direction (direction orthogonal to the paper surface of FIG. 6A) is adjusted to the same direction dimension of the seam space 2s.
As shown by the alternate long and short dash line in FIG. 6A, the fitting inhibition portion, that is, the rib 15, the subblock piece 17, and the subblock locking portion 16b are cut and removed from the strip end member 19. As shown by the solid line in FIG. 6A, the strip end member 19 after removal becomes the seam member 40.

As shown in FIG. 3, after the rehabilitation pipe 2 (spiral pipe) is made, or at least after the connection portion is made, the seam member 40 is fitted into the seam space 2s from the pipe inner space 2c side of the rehabilitation pipe 2. Since the fitting obstruction portions 15, 17 and 16b are omitted in the seam member 40, the fitting operation from the pipe inner space 2c side can be easily performed without any trouble. At this time, the position of the seam member 40 can be restricted by the connecting member 30 hitting the seam member 40 from the back side (upper side in FIG. 3) of the seam space 2s.
Further, the first temporary fixing portion 43 is wrapped around the outer peripheral side of the locking portion 14B of the strip-shaped member 3 and fitted into the locking portion 14B. Then, the second temporary fixing portion 44 is inserted into the locking portion 13B. As a result, the seam member 40 is locked (temporarily fixed) to the band-shaped member 3 of the rehabilitation pipe 2. Since the temporary fixing is performed by mechanical fitting, the seam member 40 can be stably set. Even if a force is applied to the seam member 40 at the time of joining, the seam member 40 is position-restricted by the connecting member 30, so that the locking (temporary fixing) is released or the seam member 40 is the seam. It is possible to prevent the space from falling into the depth of 2s.

Since the seam member 40 is made of the same elastic resin as the main strip 10, even if the shapes of the seam space 2s and the face plate 41 do not match slightly, the face plate 41 and the main strip 10 are elastically deformed. Therefore, the face plate portion 41 can be securely fitted into the seam space 2s. Further, the elastic deformation of the seam member 40 and the main band member 10 makes it possible to easily perform the locking operation of the temporary fixing portions 43 and 44 to the locking portions 14B and 13B.
By fitting the face plate portion 41 into the seam space 2s, the inner peripheral side surface 41a of the face plate portion 41 becomes substantially flush with the inner peripheral side surface of the main band member 10. Therefore, it is possible to prevent a step from being formed between the face plate portion 41 and the main band member 10.

Subsequently, as shown in FIG. 1, the seam member 40 is resin-welded to the main strip 11. Specifically, the welding target portion including the boundary between the end edge 41d of the face plate portion 41 and the main band member 10 and the boundary between the side edge 41e of the face plate portion 41 and the main band member 10 is resin-welded. The weld target portion is the resin welded portion 50.
Since the seam member 40 is firmly temporarily fixed to the main band member 10, it is not necessary to hold the seam member 40 so as not to fall off from the seam space 2s at the time of welding, and the welding work can be facilitated. As a result, the seam processing can be facilitated.
Further, the seam member 50 is formed into a strip-shaped member 3 not only by welding but also by fitting the face plate portion 41 into the seam space 2s and locking (temporarily fixing) the temporary fixing portions 43 and 44 to the locking portions 14B and 13B. Since it is joined to, the joint strength of the seam member 50 can be sufficiently ensured.

By welding, the space between the seam member 40 and the main band member 10 can be sealed, and the water stoppage of the rehabilitation pipe 2 at the seam of the band-shaped member 3 can be ensured.
Of the resin welded portions 50, the winding direction resin welded portion 51 extends from the seam member 40 to both sides in the winding direction. As a result, the water stoppage of the rehabilitation pipe 2 at the seam can be further ensured.
When there is a gap between the side edge 41e of the seam member 40 and the main band member 10, the resin welded portion 52 in the band width direction is thickened by repeatedly performing resin welding along the side edge 41e to widen the gap. Completely fill.
The seam member 40 is composed of scraps 19 of the main strip 10, and is made of the same polyvinyl chloride as the main strip 10. Further, the welding material of the resin welded portion 50 is also made of polyvinyl chloride. Therefore, there is no difference in the physical property values between the main strip 10, the seam member 40, and the resin welded portion 50, and for example, the linear expansion coefficients are the same. Therefore, it is possible to avoid or suppress the occurrence of thermal stress between the members 10, 40, and 50 due to the difference in the degree of expansion and contraction due to the temperature change. In addition, since the chemical resistance is the same, common measures can be taken.

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 that overlap with the above-described embodiments, and the description thereof will be omitted.
<Second Embodiment>
FIG. 8 shows a second embodiment of the present invention. In the second embodiment, an FRP (fiber reinforced plastic) joining sheet 60 is used instead of welding as a joining means between the main strip 11 and the seam member 40. Although detailed illustration is omitted, the FRP bonding sheet 60 is made of glass fiber impregnated with an epoxy resin. The glass fiber may be composed of one layer of mat (nonwoven fabric), or may be a laminated body of three layers (multiple layers) of mat-cross-mat.

As shown in FIG. 8, the FRP joint sheet 60 is attached to the inner peripheral side surface (the surface on the front side of the paper surface in FIG. 8) of these members 40 and 11 so as to straddle the seam member 40 and the main band member 11. There is. The epoxy resin of the FRP bonding sheet 60 at the time of attachment is uncured and has adhesiveness or adhesiveness. After pasting, the epoxy resin cures. As a result, the main strip 11 and the seam member 60 are joined via the FRP joining sheet 60.

Further, the FRP joint sheet 60 includes a pair of winding direction sheet portions 61 and a pair of band width direction sheet portions 62. The winding direction sheet portion 61 extends in the winding direction (vertical direction in FIG. 8) of the strip-shaped member 3 along the boundary between the end edge 41d of the face plate portion 41 and the main band member 10, and the face plate portion 41 And the main band material 10. Further, the winding direction sheet portion 61 extends from the seam member 40 on both sides in the winding direction. The length of the winding direction sheet portion 61 is larger than the length of the edge 41d.
It should be noted that both ends of the winding direction sheet portion 61 may exactly coincide with both ends of the end edge 41d of the face plate portion 41. The length of the winding direction sheet portion 61 may be longer than the length of the edge 41d.

The band width direction sheet portion 62 extends in the band width direction (left and right in FIG. 8) along the boundary between the side edge 41e of the face plate portion 41 and the main strip portion 10, and the face plate portion 41 and the main strip portion 10 It straddles. Both ends of the band width direction sheet portion 62 intersect with the winding direction sheet portion 61.
Each end of the band width direction sheet portion 62 and the winding direction sheet portion 61 may overlap each other. The band width direction sheet portion 62 and the winding direction sheet portion 61 may be integrally connected.

<Third Embodiment>
FIG. 9 shows a third embodiment of the present invention. The third embodiment relates to the modification of the second embodiment (FIG. 8), and the FRP joint sheet 60C has a square shape having a larger area than the face plate portion 41. The FRP joint sheet 60C is attached to the entire area of the inner peripheral side surface 41a of the face plate portion 41 and the inner peripheral side surface (the surface on the front side of the paper surface in FIG. 9) of the main strip 11 around the entire area. As a result, the FRP joining sheet 60C straddles the seam member 40 and the main band member 11 and joins the members 40 and 11 to each other.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, as a method of connecting the two strip-shaped members 3 to each other, as in Patent Document 2 above, for one strip-shaped member 3, the reinforcing strip 20 is projected from the main strip 10 in the strip length direction, and the other strip-shaped member 3 is connected. For No. 3, the reinforcing strip 20 may be retracted from the main strip 10 in the strip length direction, and the protruding reinforcing strip 20 may be inserted into the recessed portion.
The strip-shaped member 3 does not have to have a reinforcing strip. The band-shaped member 3 may be composed of only a main band material made of resin.
The material of the seam member may be different from the material of the main band material as long as it can be welded to the main band material.
The material of the welding material for joining the seam member and the main band material may be different from the material of the seam member or the material of the main band material as long as the seam member and the main band material can be welded.
The strip-shaped member of the present invention is not limited to the rehabilitated pipe lined on the inner circumference of the existing pipe, and can be applied to the production of various spiral pipes.

The present invention can be applied to a technique for rehabilitating an existing pipe such as an aged sewer pipe.

1 Existing pipe 2 Rehabilitation pipe (spiral pipe)
2a Inner peripheral surface 2s Seam space 3 Band-shaped member (profile)
4 Human hole 10 Main band material 10e End surface 11 Flat band part 13 Concave first fitting part 13B Locking part 14 Convex second fitting part 14B Locking part 15 Rib 16 Rib 16b Sublock locking part 17 Block piece 19 Band end material 20 Reinforcing band material 21 Body part 22 Shoulder part 23 Arm part 30 Connecting member 35 Screw 40 Seam member 41 Face plate part 41a Inner peripheral side surface of face plate part 41b Outer peripheral side surface of face plate part 41d End along winding direction Edge 41e Side edge orthogonal to the winding direction 43 First temporary fixing part 44 Second temporary fixing part 46 Rib 50 Resin welded part (welded part)
51 Winding direction resin welded part 52 Band width direction resin welded part 60, 60C FRP joint sheet

Claims (8)

A plurality of band-shaped members having a first fitting portion provided at one end in the band width direction and a second fitting portion provided at the other end in the band width direction are added in the band length direction orthogonal to the band width direction. However, it is a pipe-making method for forming a spiral tube by winding it in a spiral shape and fitting the first fitting portion and the second fitting portion, which are offset by one circumference, into a concavo-convex fit .
The end faces of the resin main strip material including the first fitting portion and the second fitting portion facing in the strip length direction while defining the inner peripheral surface of the spiral tube in the two strip-shaped members to be connected. A seam space is provided between each other,
The seam member is fitted into the seam space from the pipe inner space side of the spiral tube formed at least until it exceeds the seam space .
One locking portion consisting of a portion of one of the two strip-shaped members that faces the seam space in the second fitting portion and is not provided for the uneven fitting, and the outer peripheral side portion of the seam member. While fitting with the first temporary fixing part at one end in the direction along the band width direction,
The other locking portion of the other of the two strip-shaped members, which is formed of a portion facing the seam space in the first fitting portion and not provided for the uneven fitting, and the outer peripheral side portion of the seam member. The seam member is temporarily fixed by fitting it to the second temporary fixing portion at the other end in the direction along the band width direction .
After that, a pipe making method characterized by joining the peripheral edge portion of the face plate portion of the seam member facing the space inside the pipe and the main band member. The first aspect of the present invention is characterized in that a portion that hinders fitting from the inner space side of the pipe is removed from the band end material having the same cross section as the main band material, and the removed band end material is used as the seam member. The described pipe making method. The welding target portion including the boundary between the end edge along the winding direction and the main strip material in the face plate portion and the boundary between the side edge intersecting the winding direction and the main strip material in the face plate portion is made of resin. The pipe making method according to claim 1 or 2 , wherein the length of the resin welded portion along the winding direction of welding is equal to or greater than the length of the edge. The first fitting portion at one end in the band width direction orthogonal to the band length direction and the second fitting portion at the other end in the band width direction are spirally wound while being added in the band length direction. It is a seam member provided at the seam of a plurality of strip-shaped members that form a spiral tube by being fitted with uneven parts that are offset by one circumference .
At least in the seam space formed between the end faces of the resin main strip material including the first fitting portion and the second fitting portion of the two strip-shaped members to be connected, which face each other in the strip length direction. A face plate portion that is fitted from the pipe inner space side of the spiral pipe formed until it exceeds the seam space, a peripheral edge portion is joined to the main band member, and faces the pipe inner space of the spiral pipe.
The unevenness is integrally provided at one end of the outer peripheral side portion of the face plate portion in the direction along the band width direction, and faces the depth of the seam space in the second fitting portion of the band-shaped member of one of the two. A first temporary fixing portion that is locked to a locking portion consisting of a portion that is not provided for fitting, and a first temporary fixing portion.
The outer peripheral side portion of the face plate portion is integrally provided at the other end portion in the direction along the band width direction, and faces the depth of the seam space in the first fitting portion of the other band-shaped member of the two. A second temporary fixing portion that is locked to another locking portion consisting of a portion that is not subjected to uneven fitting, and a second temporary fixing portion.
A seam member comprising. The seam according to claim 4 , wherein the inner peripheral side surface of the face plate portion is substantially flush with the inner peripheral side surface of the main strip material and defines a part of the inner peripheral surface of the spiral tube. Element. 4 . The seam member described in. The seam member according to any one of claims 4 to 6 , wherein the seam member is made of an elastically deformable resin. The seam member according to any one of claims 4 to 7 , wherein the seam member is made of the same type of resin as the main band material.

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