JP6654838B2 - Pipe-forming members - Google Patents

Description

  The present invention relates to a pipe forming member for forming a pipe for rehabilitating an existing pipeline.

  In order to rehabilitate existing pipes such as aging sewer pipes, water pipes, agricultural water pipes, gas pipes, etc., a belt-shaped pipe-forming member is spirally wound, and one of the spirally wound pipe-forming members is used. A rehabilitation method is widely practiced in which a side edge is joined to another side edge of an adjacent pipe forming member to form a rehabilitation pipe, and the rehabilitation pipe covers an inner surface of an existing pipeline.

  A pipe-forming member for forming a rehabilitating pipe is one in which a rib is disposed along one of the long strip-shaped surfaces along the length direction, and a metal reinforcing member is fitted between adjacent ribs. And is widely practiced (for example, see Patent Document 1). When a pipe-forming member provided with such a reinforcing member is used, when it is applied to an existing pipe, it will be provided spirally in the rehabilitating pipe, thereby further increasing the strength against earth pressure and external water pressure as the rehabilitating pipe. Can be.

JP-A-11-147256

  A pipe-forming member provided with a reinforcing member is formed by, for example, extruding polyethylene to integrally form a band-shaped body provided with a substrate portion and a rib, and then successively fitting a metal reinforcing member between the ribs. Manufactured. In some cases, the manufactured band is sent to an adjacent manufacturing line as it is and integrated with the reinforcing member.However, the band is temporarily wound around a winding drum and stored, and then pulled out from the winding drum. In some cases, it is manufactured by integrating a strip-shaped body and a reinforcing member.

  When the band is wound around the winding drum, the band may overlap with each other, and the rib may be deformed to be inclined. If the ribs are irregularly inclined, the interval between the ribs tends to vary. In particular, in order to increase the rigidity of the belt-shaped body, for example, when the height of the rib is set to a high rib of 30 mm or more from the substrate, it is considered that the rib is more likely to be inclined, and the inclination of the rib is controlled. Was required.

  As shown in FIG. 10, a conventional pipe-making member 100 is formed by providing a certain gap between a reinforcing member 101 made of metal and a rib 103 of a band 102 holding the reinforcing member. When the belt-shaped body 102 is wound around the winding drum, the ribs 103 are pressed and deformed so as to push and widen the interval between the ribs 103. In this case, as shown in FIG. 11, a gap is likely to be formed between the reinforcing member 101 and the rib 103, and the reinforcing member 101 may easily fall off the rib 103. Further, when the rib 103 is deformed so as to reduce the distance between the ribs 103, as shown in FIG. 12, the reinforcing member 101 may be difficult to fit between the ribs 103. Further, even if the pipe forming member 100 is formed in a good state as shown in FIG. 10, the rib 103 is bent in a spiral shape during the winding process around the transport drum or the pipe forming process, and the ribs 103 are tilted irregularly. Was also considered.

  The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to control a tilt of a rib to stably hold a reinforcing member to be fitted between the ribs, and to obtain a required member. An object of the present invention is to provide a pipe-making member capable of exhibiting strength.

In order to achieve the above object, the solution of the present invention is based on an elongate strip-shaped pipe-forming member which is spirally wound and has a peripheral portion joined to form a tubular shape. The elongate band-shaped substrate, a plurality of ribs which are erected on one surface of the substrate in the length direction, and a band plate member are folded so as to have a groove in the length direction with respect to the tube forming member. A curved reinforcing member. The reinforcing member is attached along the rib, and a rib adjacent to the reinforcing member is provided with a locking portion protruding in the direction of the reinforcing member so as to lock to an edge of the reinforcing member. Then, at least one of the ribs adjacent to the reinforcing member is an inclined rib that is inclined inward in the width direction with respect to the substrate , and the locking portion of the inclined rib is bent into a hook shape. The end of the locking portion is directed to the direction of the substrate and is inclined outward in the width direction of the substrate .

  According to this specific matter, since at least one of the ribs to be engaged with the reinforcing member is erected in advance in an inclined state, the inclination direction of the rib when an external force is applied is directed inward in the width direction of the substrate. Can be controlled. For this reason, the reinforcing member can be stably held between the ribs of the pipe forming member without falling off.

  As a more specific configuration of the pipe forming member, it is preferable that the inclined ribs have an inclination of 5 degrees or more and 15 degrees or less inward in the width direction with respect to a plane perpendicular to the substrate. Thereby, the inclination direction of the inclined rib can be effectively controlled, and the falling off of the reinforcing member can be prevented. More preferably, the inclination of the inclined rib is set to an angle of 5 ° or more and 10 ° or less inward in the width direction with respect to a plane perpendicular to the substrate. It can be easily fitted into the space.

  Each of the plurality of ribs is formed to have a height of 30 mm or more from the substrate. Thus, the rigidity of the pipe-making member can be further increased, and a high-strength rehabilitation pipe can be formed.

  In the pipe-making member, it is preferable that the locking portion is provided at an intermediate position in the height direction of the inclined rib or the rib. Thereby, even if the inclined ribs or the ribs are inclined and deformed, the reinforcing member is less likely to fall off and can be stably held.

  In the pipe forming member according to the present invention, since at least one of the ribs adjacent to the reinforcing member is erected in a state of being inclined inward in the width direction with respect to the substrate, the inclination of the rib is effectively controlled. Therefore, the reinforcing member between the ribs can be stably held.

It is an end elevation showing the member for pipe manufacture concerning Embodiment 1 of the present invention. FIG. 3 is an end view showing a joined state of a pipe producing member according to the embodiment of FIG. 2. It is an end elevation which shows the modification of the member for pipe production which concerns on Embodiment 1. It is an end elevation which shows the other modification of the member for pipe production which concerns on Embodiment 1. It is explanatory drawing which shows the principal part of the member for pipe making which concerns on this invention typically. It is explanatory drawing which shows the mode of deformation | transformation of the inclination rib in the member for pipe making of FIG. It is an end elevation which shows the member for pipe making which concerns on Embodiment 2 of this invention. It is an end elevation which shows the member for pipe making which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the member for pipe making which concerns on Embodiment 4 of this invention. It is an end elevation which shows a part of conventional pipe manufacturing member. It is explanatory drawing which shows a mode of a deformation | transformation of the member for pipe production of FIG. It is explanatory drawing which shows the mode of another deformation | transformation of the member for pipe making of FIG.

  Hereinafter, a pipe manufacturing member 1 according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
The pipe-making member 1 according to the first embodiment shown in FIG. 1 is a long member used for pipe line rehabilitation, and has a long band-shaped substrate 2 and a substrate 2 standing on one surface of the substrate 2 in the length direction. It has strip ribs 3 and reinforcing members 8 attached along these ribs 3.

  The substrate 2 and the two ribs 3 integral with the substrate 2 are both formed by extrusion molding of a single or mixed material of synthetic resins such as polyvinyl chloride, polyethylene, and polypropylene. Each of the ribs 3 is formed to have a height from the substrate 2 of 30 mm or more.

  In the illustrated embodiment, the rib 3 includes a contact portion 32 that is bent outward in the width direction of the substrate 2 at the distal end. When the pipe-making member 1 is spirally wound, the ribs 3 are used in a direction in which these ribs 3 are arranged on the outer peripheral side of the spiral. The contact portion 32 at the tip of the rib 3 is a portion that can come into contact with the inner surface of the existing pipeline when the pipe-making member 1 is formed in a tubular shape. Although the pipe-making member 1 is used by being spirally wound, for convenience, the description will be made on the assumption that the vertical direction in the drawing is the vertical direction of the pipe-forming member 1 and the ribs 3 are erected on the substrate 2.

  At the edge of the substrate 2 in the width direction, a convex portion 5 and a concave portion 6 are provided along the length direction. The convex portion 5 and the concave portion 6 are provided in shapes that can be fitted to each other. The edge of the substrate 2 adjacent to the concave portion 6 is bent and jumped up obliquely to form an engagement piece 7.

  The reinforcing member 8 is formed by bending a metal strip member such as a steel plate, a stainless steel plate, or an aluminum plate by roll forming or the like. The reinforcing member 8 is formed to be bent so as to have two grooves 81 in the length direction and to have a ridge 82 at the center in the width direction. The reinforcing member 8 is fitted into a groove-shaped recess formed by the two ribs 3 and one surface of the substrate 2. The two ribs 3 are arranged adjacent to the reinforcing member 8. The reinforcing member 8 is not limited to being made of metal, but may be made of any material such as synthetic resin.

  When the reinforcing member 8 is fitted between the ribs 3, the reinforcing member 8 is inserted between the ribs 3 from the bottom side of the groove 81 of the reinforcing member 8, and is disposed such that the bottom of the groove 81 contacts one surface of the substrate 2. Side plates 83 formed by being raised on both side edges of the reinforcing member 8 extend to an intermediate position at the height of the rib 3. The reinforcing member 8 is formed to have a substantially W-shaped cross section as a whole, and the side plate 83 is extended inclining outward.

  The rib 3 is provided with a locking portion 33 at an intermediate position in the height direction. In the embodiment shown in FIG. 1, the locking portions 33 are protruded from the respective ribs 3 at common height positions so as to face each other. Each locking portion 33 protrudes inward in the width direction of the substrate 2 and is formed continuously in the length direction of the rib 3. That is, the locking portion 33 is provided so as to protrude toward the reinforcing member 8 held between the ribs 3. As a result, the reinforcing members 8 fitted between the ribs 3 are locked by the locking portions 33 of the ribs 3 on both side edges, and are prevented from falling off.

  At least one of the two ribs 3 stands upright as an inclined rib 31 inclined inward in the width direction with respect to the substrate 2. In the example shown in FIG. 1, the rib 3 on the left side in the figure is an inclined rib 31, and the other rib 3 on the right side in the figure is not inclined and stands almost vertically with respect to the substrate 2.

  It is preferable that the inclined ribs 31 are erected at an angle of 5 to 15 degrees inward in the width direction of the substrate 2 with respect to a plane perpendicular to the substrate 2. As described above, since the inclined rib 31 is inclined inward in the width direction of the substrate 2, it is easy for the inclined rib 31 to fall inward in the width direction of the substrate 2 when an external force acts.

  For example, when the pipe-making member 1 is wound or helically bent, an external force may be applied to the inclined rib 31 in a direction parallel to the height direction. In such a case, the inclined rib 31 is easily inclined inward in the width direction of the substrate 2, and is suppressed from inclining outward in the width direction of the substrate 2. Therefore, the pipe-making member 1 is deformed so as to narrow the gap between the rib 3 and the inclined rib 31 with the reinforcing member 8 interposed therebetween, but hardly deforms so as to widen the gap.

  Since the distance between the rib 3 and the inclined rib 31 is not easily expanded, the reinforcing member 8 attached to the pipe-making member 1 is unlikely to fall off from between the rib 3 and the inclined rib 31. Even if the rib 3 is deformed and a gap is formed between the rib 3 and the reinforcing member 8, the locking portion 33 is locked to the edge of the reinforcing member 8 to prevent it from falling off. For this reason, in the pipe forming member 1, the reinforcing member 8 is less likely to shift or fall off, and the attached state of the reinforcing member 8 is stably maintained. Therefore, at the time of manufacturing the pipe producing member 1 and at the time of producing a rehabilitating pipe using the pipe producing member 1, the necessity of repair work of the reinforcing member 8 and the like is greatly reduced, and the pipeline can be efficiently rehabilitated. .

  The inclination angle of the inclined rib 31 may be less than 5 degrees, but is preferably 5 degrees or more in order to effectively control the inclination deformation of the inclined rib 31. In addition, when the inclination angle of the inclined rib 31 is large, it is difficult to attach the reinforcing member 8, and the angle is preferably 15 degrees or less. More preferably, the inclination of the inclined ribs 31 is set at an angle of 5 ° or more and 10 ° or less inward in the width direction with respect to a plane perpendicular to the substrate 2, so that the reinforcing member 8 can be easily attached and fall off. It can be difficult.

  The pipe-making member 1 is spirally wound, and as shown in FIG. 2, the convex portions 5 and the concave portions 6 of the adjacent peripheral portions are joined by being fitted to each other to form a tubular shape. Further, the engagement piece 7 outside the concave portion 6 is wound and engaged with the contact portion 32 at the tip of the adjacent rib 3 to be fixed.

  When a pipe is rehabilitated using such a pipe-making member 1, a rehabilitation pipe made of the pipe-making member 1 is disposed in an existing pipe, and a mortar or the like is provided between an inner surface of the existing pipe and an outer surface of the rehabilitation pipe. The backfill material is filled. Since at least one of the ribs 3 adjacent to the reinforcing member 8 is the inclined rib 31 inclined inward in the width direction with respect to the substrate 2, the deformation direction is controlled to be inward in the width direction, and the reinforcing member 8 has a predetermined strength. The rehabilitation pipe structure is ensured, and the backfill material is filled with a thickness of 30 mm or more over the entire outer circumference of the rehabilitation pipe.

  Modifications of the pipe producing member 1 according to the first embodiment include the forms shown in FIGS. In the embodiment shown in FIG. 3, the rib 3 on the side different from the pipe producing member 1 shown in FIG. 1, that is, the rib 3 on the right side in the figure is formed as an inclined rib 31. The inclined ribs 31 are provided upright at an angle of 5 to 10 degrees with respect to a plane perpendicular to the substrate 2. Also in this example, the rib 3 and the inclined rib 31 hold the reinforcing member 8, and the inclined rib 31 acts to prevent the reinforcing member 8 from falling off.

  As shown in FIG. 4, the pipe producing member 1 may be configured such that both ribs 3 on the substrate 2 are inclined ribs 31 and both are inclined inward in the width direction of the substrate 2. Even in the pipe producing member 1, when an external force acts, the inclination direction of the inclined rib 31 can be controlled to the inside in the width direction, and the falling off of the reinforcing member 8 can be prevented.

  The state of the deformation of the pipe producing member 1 will be described with reference to FIGS. In this example, the reinforcing member 8 is shown in a simplified form in a groove shape, and is shown in a form in which a locking portion 33 is provided at the tip of the inclined rib 31. In the pipe-making member 1, the ribs 3 on both sides of the reinforcing member 8 are inclined inward in the width direction of the substrate 2 in advance to form inclined ribs 31. Thereby, the inclined rib 31 is easily inclined in the inclination direction.

  As shown in FIG. 5, when no external force is applied, the two inclined ribs 31 are inclined in a direction for holding the reinforcing member 8 therebetween. As shown in FIG. 6, when an external force F acts, the inclined rib 31 is deformed to be further inclined inward in the width direction of the substrate 2. Such a deformation is a deformation in a direction in which the inclined rib 31 holds the reinforcing member 8. For this reason, falling off of the reinforcing member 8 in the pipe-making member 1 is effectively prevented. Even if the two slanted ribs 31 are deformed so as to be pushed and spread to each other in the direction opposite to the inclined direction, the end portions of the reinforcing member 8 are locked by the locking portions 33 and are prevented from falling off.

(Embodiment 2)
The pipe-making member 1 according to the second embodiment shown in FIG. 7 has the same basic configuration as the first embodiment. Since the pipe manufacturing member 1 of each embodiment described below including this embodiment is common in the basic configuration with the first embodiment, the same reference numerals as those in the first embodiment will be used. Description will be omitted, and redundant description of each component will be omitted.

  In this embodiment, the substrate 2 of the pipe-making member 1 is formed wider than that of the first embodiment. Each of the two ribs 3 is formed to be inclined inward in the width direction of the substrate 2, and is an inclined rib 31. One of the inclined ribs 31 closer to the convex portion 5 has a locking portion 33 provided at a distal end portion with a substantially T-shaped cross section. The other inclined rib 31 close to the concave portion 6 has a locking portion 33 provided at a tip portion in a substantially hook shape, and stands upright so as to be continuous with the concave portion 6. The edge of the reinforcing member 8 is locked and held by the locking portion 33.

  In fixing the reinforcing member 8 between the inclined ribs 31, the pipe-making member 1 inserts the bottom of the groove 81 of the reinforcing member 8 between the inclined ribs 31 and makes contact with the substrate 2. The inclined ribs 31 hold the reinforcing member 8 from both sides, thereby effectively preventing the reinforcing member 8 from falling off.

(Embodiment 3)
In the pipe producing member 1 according to the third embodiment shown in FIG. 8, the substrate 2 is formed wider than those of the first and second embodiments. The substrate 2 is provided with four ribs 3 having a height of 30 mm or more. Of these ribs 3, two ribs 3 erected at the center in the width direction of the substrate 2 are formed as inclined ribs 31. These inclined ribs 31 are both set up so as to be inclined inward in the width direction of the substrate 2. The distal end of the inclined rib 31 is bent at the periphery of the contact portion 32 and has a locking portion 33. The locking portion 33 is formed in a hook shape so as to lock to the edge of the reinforcing member 8.

  The reinforcing member 8 is formed in a substantially W-shaped cross section by bending a metal strip member. The reinforcing member 8 is attached between the inclined ribs 31 by being inserted from the groove 81 side of the reinforcing member 8. The edge of the reinforcing member 8 is fitted inside the locking portion 33. Thus, the reinforcing member 8 is held and fixed by the inclined ribs 31 on both sides. Since the inclination direction of the inclined rib 31 when an external force is applied is controlled, a reinforcing member is used when the pipe forming member 1 is wound on a drum or when the pipe forming member 1 is wound to form a rehabilitating pipe. 8 can be effectively prevented from slipping or falling off.

(Embodiment 4)
The pipe manufacturing member 1 according to the fourth embodiment shown in FIG. 9 is different from the embodiment in which the side edges of the substrate 2 are joined to each other, and is configured to be joined using a connector member 9. have. In this case, concave portions 61 are provided on both side edges of the substrate 2 in the longitudinal direction, respectively, and the connector members 9 are fitted into the concave portions 61 that are spirally wound and adjacent to each other. The connector member 9 includes two convex portions 91 that fit together into two adjacent concave portions 61.

  The tube forming member 1 is spirally wound, for example, with one of the convex portions 91 of the connector member 9 fitted into one of the concave portions 61 in the width direction. Then, the other of the convex portions 91 of the connector member 9 is fitted into the other concave portion 61 adjacent to the tube forming member 1 during the winding process, and is joined to each other.

  The substrate 2 is provided with three ribs 3. Among these, the inclined rib 31 is provided near the concave portion 61 and has an inclination of 5 degrees or more and 15 degrees or less with respect to the substrate 2 in the width direction. It is more preferable that the inclined ribs 31 are formed with an inclination of 5 degrees or more and 10 or less inward in the width direction with respect to the substrate 2. The rib 3 at the center in the width direction is erected substantially perpendicular to the substrate 2. The rib 3 and the inclined rib 31 are provided with a locking portion 33 having a substantially T-shaped cross section at the tip.

  The reinforcing member 8 is disposed so as to straddle the center rib 3 in the width direction. The rib 3 is covered with a ridge 82 of the reinforcing member 8, and a groove 81 of the reinforcing member 8 is provided between the rib 3 and the inclined rib 31. The edge of the reinforcing member 8 is locked to the locking portion 33 at the tip of the inclined rib 31. Since the reinforcing member 8 is held from both sides by the two inclined ribs 31 and the inclined rib 31 is controlled to be inclined and deformed, the displacement and dropping of the reinforcing member 8 in the pipe forming member 1 are effectively prevented.

  As described above, in the pipe producing member 1 according to the embodiment of the present invention, at least one of the ribs 3 that is locked to the reinforcing member 8 is the inclined rib 31 that is erected in a state of being inclined in advance. Even if an external force acts during manufacturing or pipe making, the inclined rib 31 is prevented from being irregularly inclined, and the reinforcing member 8 is maintained in a held state. In the pipeline rehabilitation operation using the pipe-making member 1, the necessity of correcting the displacement or the like of the reinforcing member 8 is reduced, so that a rehabilitation pipe having a desired strength can be efficiently formed.

  In the present invention, the shapes of the ribs 3 and the inclined ribs 31 provided on the pipe-making member 1 and the shape of the reinforcing member 8 are not limited to those of the above-described embodiment, but may be various other forms. . The above embodiments are illustrative and not restrictive.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as a pipe forming member for forming a rehabilitated pipe.

DESCRIPTION OF SYMBOLS 1 Pipe-forming member 2 Substrate 3 Rib 31 Inclined rib 32 Contact part 33 Lock part 5 Convex part 6 Concave part 7 Lock piece 8 Reinforcement member 81 Groove 82 Ridge 83 Side plate 9 Connector member 91 Convex part

Claims (4)

A long strip-shaped pipe-forming member that is spirally wound and formed into a tubular shape by joining adjacent edges.
A long strip-shaped substrate, a plurality of ribs erected on one surface of the substrate in the length direction, and a plurality of ribs integrated with the substrate, and the rib formed by bending a strip member so as to have a groove in the length direction. and a reinforcing member attached along,
The rib adjacent to the reinforcing member includes a locking portion protruding in the direction of the reinforcing member so as to lock to an edge of the reinforcing member,
Wherein at least one rib adjacent to the reinforcing member to the substrate, Ri tilted ribs der which is a state of being inclined inward in the width direction, the engaging portion in which the inclined rib is provided on the hook-shaped is refracted provided, engaging portion of the tip pipe producing member characterized that you have inclined outward in the width direction of the substrate with oriented direction of the substrate. The pipe producing member according to claim 1,
The pipe forming member, wherein the inclined rib has an inclination of 5 degrees or more and 15 degrees or less inward in a width direction with respect to a plane perpendicular to the substrate. The pipe producing member according to claim 2,
The pipe forming member, wherein each of the plurality of ribs has a height from the substrate of 30 mm or more. In the pipe-making member according to any one of claims 1 to 3,
The member for pipe making, wherein the locking portion is provided at an intermediate position in a height direction of the inclined rib or the rib.

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