JPH0825480A - Strip material for spiral pipe - Google Patents

Abstract

PURPOSE:To provide a strip material for a spiral pipe capable of being molded into the spiral pipe smoothly without hindrance by a pipe making machine without damaging a rib or the spiral pipe. CONSTITUTION:A strip material is wound in a spiral shape and the mutually adjacent side ends thereof are bonded to form a spiral pipe. Ribs 12 having top parts 12a are provided to the strip material along the longitudinal direction of the strip material and anti-slip uneven parts 12b are provided to the upper surface of the top part 12a of each of the ribs 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an existing pipe lining member used for lining the inner surface of an aged existing pipe to form a rehabilitated spiral pipe.

[0002]

2. Description of the Related Art Conventionally, metal pipes and fume pipes have been used for a long time as existing pipes used for water supply and sewer pipes. However, these existing pipes have been aged due to long-term use. , Corrosion and cracks occur and cause water leakage.
In order to prevent this, a so-called lining has been adopted in recent years by inserting a synthetic resin pipe or the like into the inner surface of an existing pipe aged in a buried state.

As one of the above-mentioned lining means, a method is used in which a belt-shaped lining member made of synthetic resin is spirally wound to form a spiral tube, and the spiral tube is inserted into an existing tube for lining. For example, JP-A-2-24531
No. 7 and Japanese Examined Patent Publication No. 3-48392 describe examples of lining methods using this spiral tube.

[0004]

However, the lining member of the belt-shaped body or the belt-shaped member used in the above-mentioned lining publication is the top portion of the rib erected on the surface of the lining member by the driving fitting roller of the pipe manufacturing machine. There is a problem that the rib is damaged and the lining member is damaged because the rotation is forcibly applied while compressing.

Further, since the drive fitting roller is knurled to prevent slippage, it has a great influence. Especially when running a long-distance existing pipe with a large diameter and rehabilitating it, a rib is used. There was a problem that the top part of the and the fitting roller for driving the pipe making machine slipped, the lining member was damaged and the spiral tube was not rotated and advanced, so that the spiral tube could not be formed.

The present invention has been made in view of the above problems, and an object of the present invention is to solve these problems and to prevent the ribs from being damaged by the pipe-making machine and the spiral pipes. (EN) Provided is a band for spiral tubes, which is not damaged and can be smoothly formed into a spiral tube.

[0007]

In the strip for spiral tube of the present invention, the strip for spiral tube is formed by spirally winding the strip and joining adjacent side ends into a spiral tube.
A rib having a top portion is provided along the longitudinal direction on the band-shaped body, and a non-slip unevenness is provided on an upper surface of the top portion of the rib. The unevenness of the anti-slip provided on the top surface of the rib may be adhered with, for example, rubber or the like to prevent the anti-slip.

In addition to the ribs, the lining member is provided with convex portions and concave portions for fitting at both ends, and when the spiral winding is performed, the adjacent convex portions and concave portions are fitted to each other to form a spiral. It is designed to form a tube. Further, the fitting roller of the pipe manufacturing machine may be provided with irregularities, and it is more preferable if the irregularities that match the irregularities of the spiral tube strip are provided.

For the lining member of the present invention, a synthetic resin such as polyvinyl chloride or polyethylene is preferably used, and ribs and irregularities can be easily provided by extrusion molding.

[0010]

In the existing pipe lining member of the present invention,
A rib having a top portion on the strip is provided along the longitudinal direction, and the top and bottom surfaces of this rib are provided with non-slip unevenness, so that the pressing of the rib by the fitting roller of the pipe manufacturing machine can be reduced. Moreover, since the spiral tube can be rotated and advanced with a small driving torque by the unevenness of the slip prevention on the top surface of the rib, there is no damage to the rib or damage to the spiral tube, and the spiral tube is smoothly and without any trouble. Can be molded.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a strip for spiral tube of the present invention, and FIG. 2 is an enlarged perspective view of a portion A of FIG. In FIG. 1, reference numeral 1 denotes a spiral tube strip, and ribs 12, 12 are erected substantially vertically from the body 11 having a strip shape along the longitudinal direction of the body 11.
2, a convex portion 13 for fitting and a concave portion 14 for fitting are provided on the opposite side, and the concave portion 14 is continuously fitted to the convex portion 13 during so-called spiral processing, which is wound in a spiral shape. It is then shaped into a spiral tube.

Concavities and convexities 12b are formed on the upper surface of a top portion 12a which is provided on the left and right sides of the ribs 12, 12 and the concave portion 14, respectively.
Are provided at regular pitches at regular intervals in a direction perpendicular to the running direction of the ribs 12 and the recesses 14, so that the spiral tube strip 1 does not slip when rotationally molded by the fitting roller described below. It is considered.

In FIG. 2, the unevenness 12b provided on the upper surface of the top portion 12a of the rib 12 has a triangular cross section with a pointed upper end, and the groove depth D is approximately 1 millimeter.

FIG. 3 is a side view showing an embodiment of the spiral tube strip 1 of the present invention, and FIG. 4 is an enlarged perspective view of the spiral processing portion of FIG. In FIG. 3, at the corners of the existing pipe 22 extending horizontally from the bottom of the manhole 21, the pipe making machine 2
3 is installed, the lining member 1 is supplied to the pipe making machine 23, and the spiral pipe 10 that has been formed is sent into the existing pipe 22 from the tip end side of the pipe making machine 23. There is.

In FIG. 4, the spiral tube strip 1 has been supplied to a pair of fitting rollers 24, and has been supplied between the pair of fitting rollers 24 so as to be sandwiched and pressed in parallel with each other. The spiral tube 1 is advanced by advancing in the direction of the arrow in the drawing while the adjacent convex portions 13 and concave portions 14 of the spiral tube strip 1 are fitted.
It becomes 0. The spiral tube 10 molded as described above is
As described above with reference to FIG. 3, the existing pipe 22 is laid inside the existing pipe 22, and the existing pipe 22 is in a rehabilitated state.

[0016]

In the existing pipe lining member of the present invention, ribs having a top portion are provided on the strip along the longitudinal direction, and the top surface of the top portion of this rib is provided with the non-slip unevenness. The fitting roller of the pipe-making machine can reduce the pressure on the ribs, and the unevenness of the top of the ribs on the top of the ribs allows the spiral pipe to be rotated and advanced with a small driving torque. The spiral tube can be smoothly formed without any damage and smoothly. Therefore, it is preferably used as a strip for spiral tubes.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an existing pipe lining member of the present invention.

FIG. 2 is an enlarged perspective view of a portion A of FIG.

FIG. 3 is a side view showing an embodiment of the existing pipe lining member 1 of the present invention.

FIG. 4 is an enlarged perspective view of the spiral processing portion of FIG.

[Explanation of symbols]

 1 Band for spiral tube 10 Spiral tube 11 Main body 12 Rib 12a Top part 12b Concavo-convex 13 Convex part 14 Recessed part 21 Manhole 22 Existing pipe 23 Pipe manufacturing machine 24 Fitting roller D Groove depth

Claims (1)

[Claims] 1. A spiral tube band body in which a band body is spirally wound and adjacent side ends are joined together to form a spiral tube. Ribs having a top portion are provided along the longitudinal direction on the band body. A band for a spiral tube, characterized in that unevenness for preventing slippage is provided on the upper surface of the top of this rib.