JP2018204718A - Belt-like member - Google Patents

Abstract

To provide a belt-like member wound spirally to form a spiral tube, which can form a tube stably.SOLUTION: At one end part in a width direction of a flat belt part 11 of a belt-like member 3, a female fitting part 12 is provided, and at the other end part, a male fitting part 14 is provided. In the female fitting part 12, a fitting groove 13 capable of accepting the male fitting part 14 is formed. A recess direction of the fitting groove 13 is inclined inward with respect to a projection direction of the male fitting part 14 as approaching a groove bottom part 14b from a groove port part 13a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a strip-shaped member that is formed into a spiral tube by being wound spirally, and particularly relates to a strip-shaped member that is suitable for a lining tube (rehabilitated tube) along the inner peripheral surface of an embedded tube.

A method of rehabilitating a buried pipe such as an aging sewer pipe by using a long resin band member (see Patent Document 1). In this type of method, the strip member is spirally wound along the inner peripheral surface of the buried tube to form a lining tube. Preferably, the band-shaped member is smoothly inserted into the buried pipe by passing the inside of the manhole smoothly by applying the curl to the band-shaped member with a winding machine.
When the strength is not left in the buried pipe, a steel reinforcing band is attached to the band-shaped member to increase the rigidity.

  In the belt-like member of Patent Document 1, a female fitting portion is formed at one end portion in the width direction of a flat flat belt portion, and a male fitting portion is formed at the other end portion in the width direction of the flat belt portion. In the cross section orthogonal to the extending direction of the belt-shaped member, the central axis of the fitting groove of the female fitting portion and the central axis of the male fitting portion are orthogonal to the width direction of the flat belt portion. When the belt-like member is wound spirally, the male fitting portion is fitted with the one-round difference portion in the female fitting portion.

JP 2017-57920 A

The strip-shaped member having the cross-sectional shape of the above-mentioned publication has an unstable shape after passing through the winding machine, and it is not easy to stably produce pipes. That is, by attaching the curl hook, the fitting groove and the male fitting portion are not aligned, making it difficult to fit.
An object of this invention is to provide the strip | belt-shaped member which can be stably pipe-produced in the strip | belt-shaped member manufactured by the spiral tube by being wound helically in view of this situation.

In order to solve the above-mentioned problem, the present invention is a belt-shaped member that is formed into a spiral tube by being spirally wound,
A flat belt portion whose front side is directed to the inner peripheral side of the helical tube and whose back side is directed to the outer peripheral side of the helical tube;
A female fitting portion provided at one end in the width direction of the flat belt portion;
A male fitting portion that protrudes from the other end portion in the width direction of the flat belt portion to the back side and is fitted with a one-round difference portion in the female fitting portion by the pipe making,
A plurality of ribs protruding to the back side away from each other in the width direction of the flat belt portion;
The female fitting portion is extended so as to incline outward from the outer end portion on the opposite side to the flat belt portion side and toward the female fitting portion from the flat belt portion. An extended locking piece that is locked to a part of the locking rib that is closest to the fitting protrusion among the plurality of ribs;
The female fitting portion is formed with a fitting groove that is open on the front side surface of the female fitting portion and can receive the male fitting portion,
With respect to the protruding direction of the male fitting portion, the recess direction of the fitting groove is inclined inwardly opposite to the outer direction as it goes from the groove opening portion to the groove bottom portion of the fitting groove. It is characterized by.

According to the belt-like member, the recess direction of the fitting groove and the protruding direction of the male fitting portion can be matched by the cross-sectional deformation when the curvature is given by the winding machine or the pipe making machine. As a result, the male fitting portion can be reliably fitted into the fitting groove, and the pipe can be stably manufactured.
It is preferable that the inclination angle of the central axis along the recess direction of the fitting groove with respect to the central axis along the protruding direction of the male fitting portion is 5 ° to 10 °.
It is preferable to increase the tilt angle as the curvature increases, and decrease the tilt angle as the curvature decreases.

Further comprising a reinforcing strip provided on the back side of the flat strip,
One of the plurality of ribs is a first rib protruding from the female fitting portion to the back side and inclined inward.
One end of the reinforcing strip in the width direction is preferably engaged with the first rib so as to allow a predetermined amount of deformation of the first rib in the outward direction.
Thereby, by giving a curvature to the belt-shaped member, the first rib is deformed so that the inward inclination becomes small, and accordingly, the inclination of the female fitting portion also becomes small. Transformed into After the deformation of the first rib reaches a predetermined amount, the deformation of the first rib is prevented or restricted by the reinforcing band member, while at least the extension locking piece of the female fitting portion and the extension locking piece. Can be further modified.

It is preferable that the front side surface on the extension locking piece side from the fitting groove of the female fitting portion is inclined to the back side with respect to the width direction of the flat belt portion as it goes to the extension locking piece. .
Thereby, the front side surface of the female fitting portion can be along the width direction of the flat belt portion by the cross-sectional deformation when the curvature is given to the belt-shaped member.
It is preferable that the inclination angle of the front side surface of the female fitting portion with respect to the width direction of the flat belt portion is 15 ° to 22 °.
It is preferable to increase the tilt angle as the curvature increases, and decrease the tilt angle as the curvature decreases. For example, when the curvature is 1/600 mm, an inclination angle of 17 ° to 20 ° is preferable.

  According to the belt-shaped member according to the present invention, the fitting groove and the male fitting portion can be aligned with each other by the cross-sectional deformation when the curvature is given by the winding machine or the pipe making machine. As a result, the male fitting portion can be reliably fitted into the fitting groove, and the pipe can be stably produced.

FIG. 1 is a cross-sectional view of a belt-like member according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which the buried pipe is rehabilitated using the belt-like member. FIG. 3 is a cross-sectional view of the belt-like member in the intermediate stage of the curl (curvature) application process by the curler shown in FIG. FIG. 4 is an enlarged cross-sectional view of the circle IV in FIG. FIG. 5 is a cross-sectional view of the band-shaped member after the curl (curvature) application step. FIG. 6 is a cross-sectional view illustrating a state in which a spiral tube is manufactured from a belt-shaped member in a pipe manufacturing process by the pipe manufacturing machine illustrated in FIG. FIG. 7 is a cross-sectional view of the rehabilitated existing pipe. FIG. 8 is an enlarged cross-sectional view of the circle VIII in FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 7, this embodiment is applied to the rehabilitation of the buried pipe 1 such as an aged sewer pipe. By lining the lining pipe 2 along the inner circumference of the buried pipe 1, the inner circumferential surface of the buried pipe 1 is renewed. The lining pipe 2 is constituted by a belt-like member 3. The belt-shaped member 3 is spirally wound and the edges that are different from each other are joined together to form a spiral tube, that is, a lining tube 2.

As shown in FIG. 1, the band-shaped member 3 includes a band main body 10 and a reinforcing band member 20 and extends long in a direction perpendicular to the paper surface of FIG. 1.
The band body 10 is formed by extruding a thermoplastic resin such as polyvinyl chloride, polyethylene, or polypropylene, and has a constant cross-sectional shape regardless of the position in the extending direction. Specifically, the band main body 10 includes a flat band portion 11, a fitting groove 13, a male fitting portion 14, a plurality of ribs 15 and 16, and an extending locking piece 17.
The flat belt portion 11 has a smooth front side surface 11a and a back side surface 11b facing the opposite back side, and has a flat belt shape. The front side surface 11 a becomes the inner peripheral surface of the lining pipe 2. The back side surface 11 b is directed to the outer peripheral side of the lining pipe 2.

A female fitting portion 12 is provided at one end of the flat belt portion 11 in the width direction (left end portion in FIG. 1). The female fitting part 12 is retracted to the back side (upper side in FIG. 1) than the flat band part 11, and a bent part 11c is formed at the boundary between the flat band part 11 and the female fitting part 12.
A fitting groove 13 is formed in the female fitting portion 12. A groove part 13 a of the fitting groove 13 is opened on the front side (downward in FIG. 1) of the female fitting part 12. The groove bottom portion 13b of the fitting groove 13 has a substantially circular cross section having a diameter larger than the width of the groove opening portion 13a. As a result, the cross-sectional shape of the female fitting part 12 is substantially Ω-shaped.

  The belt body 10 is provided with a plurality of ribs 15 and 16 so as to protrude to the back side (upper side in FIG. 1). The ribs 15 and 16 are separated from each other in the width direction of the flat belt portion 11 (left and right in FIG. 1). Here, the first rib 15 is provided in the female fitting portion 12, and the second rib 16 is provided in a portion on the other side in the width direction of the flat belt portion 11 (rightward portion in FIG. 1).

  A reinforcing end engaging portion 18 is formed at the intermediate height of the first rib 15. The reinforcing end engaging portion 18 protrudes from the first rib 15 toward the second rib 16. A locking claw 18 e is formed at the tip of the reinforcing end engaging portion 18.

An extended end locking portion 16 a is formed at the tip end portion (the upper end portion in FIG. 1) of the second rib 16.
A reinforcing end engaging portion 16 b is formed at the intermediate height of the second rib 16. The reinforcing end engaging portion 16 b protrudes from the second rib 16 toward the first rib 15.

  An extending locking piece 17 is connected to the outer end of the female fitting portion 12 (the end opposite to the flat belt portion, the left end in FIG. 1). The extending locking piece 17 extends so as to incline outward from the female fitting portion 12 toward the back side (the direction from the flat belt portion 11 to the female fitting portion 12, left in FIG. 1). .

A male fitting portion 14 is formed at the other end portion (right end portion in FIG. 1) in the width direction of the flat belt portion 11 so as to protrude to the back side (upper side in FIG. 1).
The male fitting part 14 has a pillar part 14a protruding from the flat belt part 11 and a head part 14b provided at the tip part of the pillar part 14a. The head portion 14b has a substantially circular cross section having a diameter larger than the width of the column portion 14a.
A central axis L ₁₄ along the protruding direction of the male fitting portion 14 is substantially orthogonal to the width direction of the flat belt portion 11.

  As shown in FIG. 8, in the lining pipe 2, the male fitting portion 14 is fitted with a one-round difference portion in the fitting groove 13 of the female fitting portion 12. Specifically, the column portion 14a is fitted into the groove opening portion 13a, and the head portion 14b is fitted into the groove bottom portion 13b. Further, the extended end locking portion 16 a of the second rib 16 (the rib closest to the male fitting portion 14) is locked with the tip of the portion of the extended locking piece 17 that is different in one round.

  As shown in FIG. 1, a reinforcing band member 20 is provided on the back side of the flat band portion 11 of the band-shaped member 3. The reinforcing band member 20 is made of a steel plate and has higher rigidity than the band body 10. That is, when a certain external force is applied to the band body 10 and the reinforcing band member 20, the deformation amount of the reinforcing band member 20 is smaller than the deformation amount of the band body 10.

  The reinforcing band member 20 has a U-shaped body portion 21 having a U-shaped cross section, a pair of shoulder portions 23 and 23 connected to both ends thereof, and a pair of end plate portions 25 and 26 connected to the shoulder portions 23. It has a substantially W-shaped cross section and extends in the same direction as the band body 10. The body part 21 protrudes from the center part in the width direction of the flat belt part 11 to the back side. A pair of shoulder portions 23, 23 is addressed to the back side surface 11 b of the flat belt portion 11. The end plate portions 25 and 26 protrude from the shoulder portion 23 to the back side (upper side in FIG. 1), and are slightly inclined so that the distance between the end plate portions 25 and 26 increases toward the back side.

A front end portion 25 e of the end plate portion 25 at one end portion (left end portion in FIG. 1) in the width direction of the reinforcing band member 20 is engaged with the reinforcing end engaging portion 18 of the first rib 15. In the engaged state, the first rib 15 is allowed to deform outward (leftward in FIG. 1) by a predetermined amount (FIG. 3).
A distal end portion 26 e of the end plate portion 26 at the other end portion in the width direction of the reinforcing band member 20 (right end portion in FIG. 1) is engaged with the reinforcing end engaging portion 16 b of the second rib 16.

The belt-like member 3 is different from that of Patent Document 1 particularly in the following points.
The recess direction from the groove opening portion 13a of the fitting groove 13 toward the groove bottom portion 13b is inwardly directed toward the groove bottom portion 13b with respect to the protruding direction from the column portion 14a of the male fitting portion 14 toward the head portion 14b (described above). It is inclined in a direction opposite to the outward direction (rightward in FIG. 1).
With respect to the central axis _{L 14} along the projecting direction of the male fitting portion 14, the inclination angle theta ₁₃ of the center axis _{L 13} along the recessed direction of the fitting groove 13 is preferably θ ₁₃ = 5 ° ~10 °, more Preferably, θ ₁₃ is about 8 °.
The first rib 15 is inclined inward (to the right in FIG. 1) toward the tip. The inclination angle θ ₁₅ of the first rib 15 with respect to the direction orthogonal to the flat band portion 11 is preferably θ ₁₅ = 5 ° to 10 °, and more preferably about θ ₁₅ = 8 °.
Further, the front side surface 12a of the female fitting portion 12 on the side of the extending locking piece 17 with respect to the fitting groove 13 is directed to the width direction of the flat belt portion 11 as it goes outward (leftward in FIG. 1). It is inclined to the back side. The inclination angle theta ₁₂ of the front plane 12a with respect to the width direction of the Tairatai portion 11 is preferably θ ₁₂ = 15 ° ~22 °.

The belt-like member 3 is manufactured as follows and is further manufactured.
Although illustration is omitted, a mold having a predetermined shape corresponding to the cross-sectional shape of the band body 10 is produced and set in an extrusion molding machine. The band main body 10 is extrusion-molded by the extruder and wound on a primary winding drum.
Next, the band main body 10 is drawn out from the primary winding drum and fitted with the reinforcing band member 20 to produce the band-shaped member 3, and the band-shaped member 3 is wound around the winding drum 4.

As shown in FIG. 2, the winding drum 4 is transported to the rehabilitation construction site and installed near the upper end of the starting side manhole 6. A winder 5 is installed near the winding drum 4. A pipe making machine 7 is installed at the bottom of the starting manhole 6. A winch 8 is installed near the reaching manhole 6B.
In addition, as the winding machine 5 and the pipe making machine 7, the well-known structure disclosed by Unexamined-Japanese-Patent No. 2013-256048 etc. is applicable, for example.

The belt-shaped member 3 is fed out from the winding drum 4, and the winding material is applied to the belt-shaped member 3 by the winding machine 5. Preferably, the spiral outer diameter φ _{3 formed} by the band-like member 3 after applying the curl is made smaller than the inner diameters of the manhole 6 and the buried pipe 1. As a result, the belt-like member 3 can be smoothly passed through the manhole 6, and the lining pipe 2 having a desired diameter can be reliably produced by the pipe making machine 7.

As shown in FIG. 3, the cross-sectional shape of the band-shaped member 3 is deformed by giving the band-shaped member 3 a curl (curvature). Specifically, the belt-like member 3 is bent by the winding machine 5 so that the front side surface 11a of the flat belt portion 11 faces the inner peripheral side and the back side surface 11b faces the outer peripheral side. As a result, as shown from the two-dot chain line in FIG. 3 to the solid line, the portion of the band body 10 outside in the width direction from the bent portion 11c (left side in FIG. 3) is centered around the bent portion 11c. The cross section is deformed so as to be rotationally displaced counterclockwise in FIG. Therefore, the inclination of the first rib 15 is reduced, and the smaller the inclination angle theta ₁₃ of the center axis _{L 13} of the fitting groove 13, the inclination angle theta ₁₂ of the front surface 12a of the female engaging portion 12 is reduced.

As shown in FIG. 4, when the rotational displacement amount (deformation amount) reaches a predetermined amount by bending the belt-like member 3, the locking claw 18 e is hooked on the end portion 25 e of the reinforcing member 20. Thereby, the deformation of the first rib 15 is prevented or restricted.
The predetermined rotational displacement amount is preferably about 5 ° to 10 °, more preferably about 8 °. As a result, the first rib 15 can be deformed until it becomes a substantially upright posture with respect to the flat belt portion 11, and the deformation can be stopped there.

As shown in FIG. 5, even if the curvature of the strip-like member 3 is further increased, the first rib 15 is maintained in the upright posture. On the other hand, as shown by the solid line from the three-dot chain line in FIG. 5, the portion outside the first rib 15 (left side in FIG. 5) and the extending locking piece 17 in the female fitting portion 12 are shown in FIG. 5. It is further rotationally displaced counterclockwise. The displacement possible angle of the female fitting part 12 and the extended locking piece 17 after the deformation of the first rib 15 is, for example, about 7 ° to 12 °.
As a result, the fitting groove 13 is narrowed, and the central axis L ₁₃ is further rotated to be substantially parallel to the central axis L ₁₄ of the male fitting portion 14. Further, the width direction of the front side surface 12 a of the female fitting portion 12 is substantially parallel to the width direction of the flat belt portion 11.

As shown in FIG. 2, the band-like member 3 after applying the curl and then the cross-sectional deformation is introduced into the pipe making machine 7, and the pipe making machine 7 causes the edges of the spiral band-like member 3 to have different edges. Be joined.
Specifically, as shown in FIG. 6, the male fitting portion 14 of the band portion 3a newly introduced into the pipe making machine 7 in the band-shaped member 3 is fitted with the female fitting portion 12 of the pipe-formed portion 3b. Is done. By the cross-sectional deformation at the time of applying the curl, the center axes L ₁₃ and L _{14 of the} fitting portions 12 and ₁₄ can be made to substantially coincide with each other. Therefore, the male fitting part 14 of the band part 3a can be securely fitted into the fitting groove 13 of the pipe-made part 3b.
Further, as shown by a two-dot chain line in FIG. 6, the end of the belt portion 3a on the male fitting portion 14 side in the flat belt portion 11 is connected to the female fitting portion 12 and the flat belt portion 11 in the pipe-formed portion 3b. It can be made to fit snugly into the step part 10d made by
Furthermore, the extended end locking portion 16a of the band portion 3a is locked with the tip end portion of the extended locking piece 17 of the tube-formed portion 3b.
Thereby, the lining pipe 2 made of a helical pipe can be stably produced.

As shown in FIG. 2, the pulling wire 8 w is connected to the tip of the pipe-formed part 3 b, and the pipe-made part 3 b is pulled toward the reaching side manhole 6 </ b> B by the winch 8. As a result, the piped portion 3b, that is, the lining pipe 2 is inserted into the buried pipe 1 as the pipe production proceeds, and the lining pipe 2 can be lined along the inner peripheral surface of the buried pipe 1.
Thereafter, as shown in FIGS. 7 and 8, a backfilling material 9 such as mortar is filled between the inner peripheral surface of the buried pipe 1 and the lining pipe 2.
In this way, the buried pipe 1 is rehabilitated.

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, as a method for manufacturing the lining pipe 2 (spiral pipe), instead of the pulling type of the embodiment, a main pushing type, a self-propelled type, or the like may be employed (Japanese Patent Laid-Open Nos. 2014-65170 and 2006 No. 43555 etc.).
The end plate portions 25 and 26 of the reinforcing band member 20 may not extend from the shoulder portion 23, and may extend from the middle of both arm portions of the trunk portion 21.
The winding machine 5 may be omitted. When the belt-like member 3 is wound by the pipe making machine 7, the belt main body 10 may be deformed into a desired cross section (FIG. 5).
The number of ribs 15 and 16 is not limited to two and may be three or more.
The buried pipe 1 to be rehabilitated is not limited to a sewer pipe, and may be a water pipe, an agricultural water pipe, a gas pipe, or the like.

  The present invention can be applied to rehabilitation of sewer pipes, for example.

1 buried pipe 2 lining pipe (spiral pipe)
3 Belt-shaped member 5 Winding machine 7 Pipe making machine 10 Band main body 11 Flat belt part 11
12 Female fitting part 12
12a Front side surface 13 Fitting groove 13a Groove opening part 13b Groove bottom part 14 Male fitting part 15 First rib (rib)
16 Second rib (rib)
16a Extension end locking part 16a
16b Reinforcing end engaging portion 16b
17 end _{L 13} central axis _{L 14} center axis of the extending locking piece 20 reinforcing strip 25e reinforcing member

Claims (5)

A band-shaped member that is formed into a spiral tube by being wound spirally,
A flat belt portion whose front side is directed to the inner peripheral side of the helical tube and whose back side is directed to the outer peripheral side of the helical tube;
A female fitting portion provided at one end in the width direction of the flat belt portion;
A male fitting portion that protrudes from the other end portion in the width direction of the flat belt portion to the back side and is fitted with a one-round difference portion in the female fitting portion by the pipe making,
A plurality of ribs protruding to the back side away from each other in the width direction of the flat belt portion;
The female fitting portion is extended so as to incline outward from the outer end portion on the opposite side to the flat belt portion side and toward the female fitting portion from the flat belt portion. An extended locking piece that is locked to a part of the locking rib that is closest to the fitting protrusion among the plurality of ribs;
The female fitting portion is formed with a fitting groove that is open on the front side surface of the female fitting portion and can receive the male fitting portion,
With respect to the protruding direction of the male fitting portion, the recess direction of the fitting groove is inclined inwardly opposite to the outer direction as it goes from the groove opening portion to the groove bottom portion of the fitting groove. A belt-like member characterized by the above.   2. The belt-shaped member according to claim 1, wherein an inclination angle of the central axis along the recess direction of the fitting groove with respect to the central axis along the protruding direction of the male fitting portion is 5 ° to 10 °. . Further comprising a reinforcing strip provided on the back side of the flat strip,
One of the plurality of ribs is a first rib protruding from the female fitting portion to the back side and inclined inward.
The one end portion in the width direction of the reinforcing strip is engaged with the first rib so as to allow a predetermined amount of deformation of the first rib in the outward direction. The belt-like member according to 1 or 2.   The front side surface on the side of the extension locking piece from the fitting groove of the female fitting portion is inclined to the back side with respect to the width direction of the flat belt portion as it goes to the extension locking piece. The strip-shaped member according to claim 3.   The band-shaped member according to claim 4, wherein an inclination angle of the front side surface of the female fitting portion with respect to a width direction of the flat belt portion is 15 ° to 22 °.

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