JP2876278B2 - Pipe lining composition strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip for forming a pipe lining, and more particularly, to a pipe liner which is spirally wound to form a pipe liner. The present invention relates to a strip (hereinafter, referred to as a "strip") that is applied to a structure of a tube lining that forms a gap.

[0002] One type of pipe lining construction is to use a strip of this type, apply a liner to the pipe in a state where the spacer on the back of the strip is in contact with the inner surface of the pipe under the above-mentioned specifications, that is, in close contact with the pipe. The backing material such as grout is injected into the voids to fix the liner.

[0003]

2. Description of the Related Art In a conventional strip used for pipe lining work of this type, a spacer for forming a backfill space extends continuously in the strip length direction and is arranged in parallel in the strip width direction. This is a configuration including a rib formed on the back surface. In this configuration, when the strip is spirally wound within the tube to form a liner, the ribs will be interposed between the tube and the liner in the form of a multi-thread thread. According to this, in the gap formed by the interposition of the rib on the back of the liner, since the gap spirals in the length direction of the liner, it cannot be backed at once over a long span, Also, the backfill material cannot be spread because the gap is divided in parallel with the ribs.

[0004] For such a reason, a method of hitherto has been adopted in which a hole is formed at a pitch of 1 to 3 m at an upper portion of a liner formed by spirally winding a strip, and a backfill material is injected through the hole. According to this, it is very inefficient.

Further, depending on the condition of damage to the existing pipe, the backfill must be thickened to improve the strength, but the conventional one cannot cope with this. That is, if the ribs on the rear surface of the strip are raised in order to cope with such a situation, the bending rigidity of the strip itself becomes too strong, and helical winding in the pipe becomes impossible or extremely difficult.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a strip of the type mentioned at the beginning, which is simply wound spirally and a liner is tightly adhered to a pipe, thereby making it possible to easily inject a backfill material. Possible voids can be formed in the back of the liner and can successfully meet the demand for increased backfill thickness.

[0007] The contact-bonding method does not require the use of a separate liner centering device or equipment for floating the strip required on the inner surface of the pipe in the floating-bonding method, and is simpler than the floating-bonding method.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a tube lining forming strip having a spacer for forming a back-filling space on a back surface and spirally wound into a tube liner. In, as the spacer,
A first element formed by a rib formed on the rear surface of the strip so as to extend in the longitudinal direction thereof, and a second element formed by a projection having an entirely empty space protruding from the rib, or It is characterized in that it comprises a second element which is detachably attached to the rib by a projection which is entirely vacant and protrudes higher than the rib.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described with reference to the drawings, which illustrate embodiments of the invention.

[0010] The strip 1 has a spacer S on the back surface for forming a backfill space C. The spacer S includes, as constituent elements, a first element S1 formed of ribs 2 and a second element S2 formed of juxtaposed protrusions 3.

The ribs 2 serving as the first spacer elements S1 are formed on the back surface of the strip 1 so as to extend in the length direction, and are arranged in parallel in the width direction of the strip 1.

The protrusions 3 constituting the second spacer element S2 are arranged in a row or a continuous form in which the protrusions 3 protrude from the ribs 2 and have voids 4 in the entire area and are arranged in the length direction of the ribs 2. (Embodiment I) (FIGS. 1 to 8), or a parallel body or a continuous body which is joined to the rib 2 and has a void 4 entirely and protrudes higher than the rib 2 and is arranged in the longitudinal direction of the rib 2 Embodiment (Embodiment II) (FIGS. 9 to 20). 1 to 6 show the parallel body format in the embodiment I, and FIGS. 7 and 8 show the continuum format in the embodiment I, and FIGS. 9 to 12, 15, 16, 18, 19, and 2
0 is the parallel body type in Embodiment II, and FIGS. 13, 14, and 17 are Embodiment II
In continuum form.

In the embodiment I, the protrusions 3 may be formed integrally with the ribs 2 or may be formed by bonding. Second
If the element S2 is provided on all the ribs 2, it does not matter whether the element S2 is provided on the ribs 2 which are several steps apart. The parallel-body type projection 3 is
It can be a trapezoidal plate (FIGS. 1 to 4) or a trapezoidal plate with a flange 31 at the top end (FIGS. 5, 6). The continuum-shaped projection 3 can be a spiral strip (FIG. 7) or a corrugated plate (FIG. 8).

The second element S2 composed of a parallel body or a continuous body of the projections 3 according to the embodiment II is detachable from the rib 2. The following configuration may be used for the detachable connection.

The bending flexibility and / or the second element S of the strip 1 with ribs 2 is such that it can be wound spirally.
2 having a bead-shaped strip 5 and a groove-shaped strip 6 capable of interlocking with each other under the same physical properties as those shown in FIGS.
2) Or a type with a bead-shaped projection 5 'and a groove-shaped strip 6' (FIGS. 13 and 14). The strips 5 and the projections 5 'are formed on the element S2, and the strips 6 and 6' are formed on the ribs 2.

Under the same bending flexibility and / or the same physical properties, the type of the anchor 30 which can be pushed between the adjacent ribs 2 and 2 of the strip 1 (FIG. 15), or the helical strip type (FIG. 17), or In the form of a tubular strip 5 "(FIG. 19). Anchor 30, strip 5" is formed in element S2.
The spiral stripe is embodied by making the element S2 itself such.

In the form of parallel leg plates 32 (FIG. 18) which can be pushed under similar conditions between the two ribs 2, 2;
Alternatively, an inverted U-shaped plate 33 having a retaining / returning portion 7, 7 at the tip (FIG. 20). The leg plate 32 is formed on the element S2, and the inverted U-shaped plate 33 is embodied by making the element S2 itself such. The inverted U-shaped plate 33 has a space 4
Is mounted between the ribs 2 and 2 under a state where they are arranged at an interval corresponding to

In the embodiment II, the juxtaposition type projection 3 is
A substantially inverted V-shaped groove (FIG. 9), an inverted U-shaped groove (FIG. 11),
An inverted U-shaped groove (FIGS. 10 and 18), a T-shaped cross section (FIG. 12), an anchor-like plate (FIG. 16), and a square cross section (FIG. 19). be able to. The continuum-shaped projection 3 can be a spiral strip (FIG. 17) or a corrugated plate (FIGS. 13 and 14).

In any of the embodiments I and II, in the parallel body type in which the projections 3 are arranged under the intervention of a narrow space, it is preferable to provide a hole 8 in the projection. When the material is injected, the void C functions as a backing material passage in the circumferential direction.

As in the prior art, the strip 1 is spirally wound in a pipe P such as a sewer pipe buried underground, and spirally interposed between adjacent winding side edges. Joined piece 1
By 0, the adjacent winding side edges are joined. Joining strip 10
Has a cross-sectional shape that meshes with the joining ears 11 of the strip 1.

According to the present invention, a first element S1 formed by a rib 2 extending in the length direction on the back surface of the strip 1 as a back-filling space forming spacer S of the strip 1, and a protruding portion provided on the back of the rib. The second element S2 is provided with a projection 3 which is formed or connected to the rib 2 and protrudes higher than the rib 2 and has a void 4 entirely. This configuration does not yield the following results.

When the liner L is formed on the tube P by the helical winding of the strip 1, the backfill gap C created by the interposition of the spacer S of the strip 1 between the tube P and the liner L causes the backfill gap C of the second element S2. The whole space is communicated by the space 4. That is, the spirally winding of the strip 1 and the application of the liner L to the tube P in a tightly adhered manner form a back-up passage of a full-area communication type on the back surface of the liner L. For this reason, a hose can be directly injected from the end face of the gap C, or a hose can be inserted into the gap C, through which the backfill material can be easily injected over the entire back surface of the liner.

By providing the rear ribs at a relatively small interval, the outer diameter of the liner L is restricted by the pipe P, and the liner L can withstand the same back-filling pressure as that of the close bonding.

The projection 3 projecting from the back of the rib 2 or being connected to the rib 2 and projecting higher than the rib 2 has a void 4 in the entire area. The addition of the element S2 does not significantly increase the bending stiffness of the strip 1. Therefore, when it is necessary to increase the backfill for improving the strength, the height of the protruding piece 3 can cope with this without making the strip 1 having excessive bending rigidity.

In the case where the second element S2 is detachable, the cross-sectional width of the backfill gap C, that is, the backfill thickness can be easily changed by replacing the element S2 with a different height. This means that the formation of the backfill void C having a variable thickness can be embodied by a close bonding method.

[0026]

As is apparent from the above description, the present invention relates to a strip of the type described at the outset, in which the strip is spirally wound and the liner is adhered to the tube in a tightly adhered manner. A void capable of simple injection can be formed on the back surface of the liner, and the effect of being able to successfully cope with a demand for an increase in backfill thickness is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a strip according to the present invention with a part thereof omitted.

FIG. 2 shows a partially omitted perspective view of a modification of the strip according to the invention.

FIG. 3 is a similar perspective view showing a modification of the present invention different from the above.

FIG. 4 shows a perspective view of another variant of the invention.

FIG. 5 is a perspective view showing still another modification.

FIG. 6 shows a perspective view of another modification.

7 (A) is a front view of a spacer according to still another modification, and FIG. 7 (B) is a side view of FIG. 7 (A).

FIG. 8A is a front view of a spacer according to a modification different from the above, and FIG. 8B is a side view thereof.

FIG. 9 is a partially omitted perspective view showing still another modification of the strip of the present invention.

10 (A) is a front view of a spacer according to another modification of the present invention, and FIG. 10 (B) is a side view of FIG. 10 (A).

FIG. 11 is a perspective view of a spacer according to still another modification.

FIG. 12 shows a perspective view of a modified example of the second element in the spacer according to the present invention which is different from the above.

FIG. 13 (A) is a side view of a spacer according to another modified example, and FIG. 13 (B) is a front view thereof.

FIG. 14 (A) is a side view showing another modification of the spacer, and FIG. 14 (B) is a front view thereof.

FIG. 15 shows a side view of a further modified example of the present invention.

16 is a perspective view of a second element in the spacer shown in FIG.

FIG. 17A is a side view of a spacer according to still another modification, and FIG. 17B is a front view of the spacer.

FIG. 18A is a side view of a spacer according to another modification example, and FIG. 17B is a front view thereof.

FIG. 19A is a side view of a spacer according to still another modification, and FIG. 19B is a front view thereof.

FIG. 20A is a longitudinal sectional view of a spacer according to another modification, and FIG. 20B is a front view thereof.

FIG. 21 is a longitudinal sectional view showing an outline of lining work with the strip of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Strip 2 Rib 3 Projecting body 4 Vacancy C Backfill gap L Liner P Tube S Spacer S1 First element S2 Second element

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Kade 7-6, Bashizashi-cho, Tennoji-ku, Osaka-shi, Osaka In-house Osaka Waterproof Construction Co., Ltd. Kubota Vinyl Pipe Factory (72) Inventor Kazuhiro Hirao 64 Ishizukitacho, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory (72) Inventor Naoya Ozeki 1-2-8 Hatchobori, Chuo-ku, Tokyo, Ltd. (56) References JP-A-2-194928 (JP, A) JP-A 64-77524 (JP, A) JP-A-63-194029 (JP, A) (58) Fields studied (Int. Cl. ⁶ , DB name) B29C 63/00-63/48 B29C 53/56-53/78 F16L 1/00 F16L 55/16-55/18

Claims (2)

(57) [Claims] 1. A tube lining constituting strip having a spacer for forming a back-filling gap on the back side and spirally wound to form a liner of a pipe, wherein the strip is provided on the back side of the strip as the spacer. A first element formed by a rib extending in the vertical direction, and a second element formed by a projection having a void in the whole area and projecting from the back of the rib. Characteristic tube lining composition strip. 2. A tube lining forming strip which has a spacer for forming a back-filling gap on the back side and is spirally wound to form a liner of the pipe, and the strip length is provided on the back side of the strip as the spacer. A first element formed by a rib extending in the vertical direction, and a detachable second element formed by a projection which is coupled to the rib and has an overall void and protrudes higher than the rib. A pipe lining construction strip characterized by comprising: