JPH0820069A - Pipe lining construction method - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Pulling out the coil strip from the inner circumference and winding it spirally around the inner circumference of the pipe to form a liner for pipe lining construction, without twisting the strip spiral band that can be pulled out. The coil strip can be unwound by pulling out, and the long length of the coil strip, which has been impossible in the past, can be used to efficiently line the pipe. [Structure] In the pipe lining work of the above-described manner, in parallel with the unwinding, the coil strip 2 is moved in the direction opposite to the coil winding direction while the inner diameter of the coil strip 2 is smaller than the inner diameter of the pipe 3 to be constructed, and in the same direction as the unwinding progress increases. Rotate and do not rotate when both inner diameters are almost the same, or perform strip unwinding intermittently, and each time each unwinding, the unwinding is first proceeded while the strip is still stationary, and the progress causes the strip inner diameter to become the tube 3 inner diameter. When it becomes larger, the unwinding is interrupted, and the strip is rotated in the same direction as the coil winding direction, whereby the layer 2c on the inner end side of the coil is contracted to derive the inner coil portion 20, and the diameter thereof becomes the inner diameter of the tube 3. When they are almost equal, the strip rotation is stopped and the unwinding is restarted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a coil strip as a liner material, which is unwound by being drawn out from the inner circumference, and is wound on the inner peripheral surface of the pipe to be constructed by a spiral in a winding direction which follows the spiral of the strip formed by the unwinding. The present invention relates to a pipe lining construction method in which a liner is turned by joining the adjacent side edges of the winding.

The withdrawal from the inner circumference of the coil strip is
As compared with the case of drawing from the outer circumference, collapse of the coil winding layer at the time of drawing is less, and the coil strip can be smoothly unwound by drawing.

In this type of pipe lining work, due to the spiral winding of the coil strip around the inner peripheral surface of the pipe to be constructed, due to the difference between the coil inner diameter of the strip and the inner diameter of the pipe to be constructed, the spiral of the strip by the unwinding is obtained. The band is twisted in the tightening direction or in the opposite direction. The degree of kinking is not uniform because the coil inner diameter of the strip changes as the coil strip unwinds.

[0004]

2. Description of the Related Art In the pipe lining construction of the above-mentioned style, in order to eliminate the twist of the strip spiral band,
It has not been achieved yet.

By the way, conventionally, the unwinding of the coil strip has been carried out with a common specification similar to pulling out a coiled packing string. According to this, it is not hopeful to eliminate the kinks shown above, and sometimes it is impossible. Although the operator manually twists the spiral band of the strip in the required direction so that the cumulative amount of twist is weakened, the allowable length of one coil strip is 40 to 50 m. However, it is inevitable to increase the number of strip additions, and it is difficult to obtain efficient construction.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to, in pipe lining construction of the type mentioned at the beginning, pull out from the inner circumference without twisting the front strip spiral band in the winding direction or in the opposite direction. Therefore, the coil strip can be unwound and wound. Therefore, it is possible to efficiently perform the lining work of the pipe by using the long-length coil strip which has been impossible in the past.

[0007]

According to the method of the present invention, a coil strip is pulled out from an inner circumference and unwound, and the coil strip is wound on the inner circumferential surface of a pipe to be constructed by a spiral in a winding direction according to the spiral formed by the unwinding. It is characterized in that it is wound and the side edges adjacent to the winding are joined, and in the lining construction of the pipe used as the liner, the following or the following specifications are taken.

The inner diameter of the coil strip installed at the required position is d, the inner diameter of the pipe to be processed is D, and the coil strip is d <D (the inner diameter of the coil strip is smaller than the inner diameter of the pipe to be processed) in parallel with the unwinding. ), The coil is wound in the direction opposite to the coil winding direction, and when d> D (the inner diameter of the coil strip is larger than the inner diameter of the pipe to be processed) due to the unwinding of the coil strip, the coil is wound in the same direction as the coil winding direction. Rotate and do not rotate when d = D (d is equal to D) or d is almost equal to D.

The unwinding of the coil strip installed at a required position is intermittently performed, and each time the unwinding is performed, the unwinding process is performed while the coil strip is initially stationary. When it becomes larger than the inner diameter of the construction pipe, the unwinding is interrupted and the coil strip is rotated in the same direction as the coil winding direction, whereby the multiple winding layers on the inner end side of the coil strip are wound and the inner coil portion is derived from the coil strip. When the inner diameter or the outer diameter of the inner coil portion becomes substantially equal to the inner diameter of the pipe to be constructed, the rotation of the coil strip is stopped and the unwinding is restarted.

In the present invention, the "coil winding direction" of the coil strip refers to the winding direction from the coil center side. This also applies to the claims and the following description.

[0011]

Embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show a state in which the coil strip is unwound by being pulled out from the inner circumference. In the illustrated example, the coil strip is rotatably supported on the pedestal in the coil circumferential direction and installed at a required position. The frame is labeled with reference numeral 1 and the coil strip is labeled with reference numeral 2. The gantry 1 is installed at a required location on the lining construction site of the pipe 3 to be constructed (mainly an existing sewer pipe).

The pedestal 1 may have a structure as shown in FIGS. 1 and 2 in which a pair of roll type supporting arms 10, 10 extending horizontally in a laterally parallel manner and separated from each other are attached to a vertical frame 11. The support arms 10 and 10 may be a rotary type driven by a driving machine such as a motor, or may be a rotary type similar to an idle roll, that is, a non-positive rotation type. The illustrated example is a rotary type driven by a motor, and it is possible to use a known type shown in FIG. 3 in which a reversible rotary type motor M is directly connected to the shaft end of the roll type support arm 10. The coil strip 2 is a roll type supporting arm 10, 1.
It is mounted on the parallel body of 0 in parallel with the arm. When the support arms 10 and 10 are non-proactive rotation type,
The coil strip 2 on the 10 parallel bodies may rotate itself to an appropriate specification, which can be manually turned.

The mount 1 may have a structure as shown in FIG. The gantry shown in FIG. 4 is provided with a rotary drum 16 whose axis is horizontally oriented so as to support the coil strip 2 from the outer periphery by holding the claws 15 arranged in a circular shape so as to be supported by the motor m on the gantry 1. It is rotated via the transmission mechanism 17. The motor m is of a reversible rotation type. The drum 16 is supported by a support frame 18 on the mount 1. The claw 15 is a tightening type with a screw rod 19 similar to a chuck in a lathe.

The pedestal 1 is preferably a trolley type in order to ensure the ease of movement at the pipe lining construction site. The illustrated mount is a trolley type.

The strip spiral band 2a formed by pulling out the coil strip 2 on the arms 10 and 10 parallel bodies of the gantry 1 or the rotary drum 16 from the inner circumference, and unwinding the coil strip 2 through the pipe 3 at the construction site. It is drawn into the tube 3 through the hole 4, and is wound around the inner peripheral surface of the tube 3 with a spiral in the winding direction following the spiral of the band 2a, as shown in FIG.
The liner 5 is attached to the pipe 3 by joining the adjacent side edges of the spiral winding.
To form.

The specifications of the above-mentioned pull-out, pull-in, spiral winding, and joining of adjacent side edges of the spiral winding for the coil strip 2 are the same as conventional ones.

In the present invention, in parallel with the unwinding of the coil strip 2, the coil strip 2 is rotated in the direction opposite to the coil winding direction of the strip 2 when the coil strip inner diameter d is smaller than the tube inner diameter D, so that the strip 2 When the inner diameter d of the coil strip becomes larger than the inner diameter D of the pipe 3 due to the progress of unwinding, the coil 2 is rotated in the same direction as the coil winding direction of the strip 2 and is not rotated when the inner diameter d of the coil strip is equal to or almost equal to the inner diameter D of the pipe 3. (The specification described here is (I)). This is the point of the present invention.

Alternatively, in the present invention, the coil strip 2 is intermittently unwound, and each time it is unwound,
Initially, the unwinding is advanced while the coil strip 2 is stationary, and when the inner diameter of the coil strip 2 exceeds the inner diameter of the tube 3 due to the progress of the unwinding, the unwinding is interrupted,
By rotating the coil strip 2 in the same direction as the coil winding direction with the suspension, the multiple winding layers 2C on the inner end side of the coil strip 2 are contracted and contracted.
When the inner coil portion 20 is derived from the inner coil portion 20 and the inner diameter or outer diameter of the portion 20 becomes substantially equal to the inner diameter of the pipe 3, the coil strip 2
Stop the rotation of and restart the unwinding (the specification described here is (II)). This is another point of the present invention.

According to the above-mentioned specifications (I) and (II) of the present invention, the strip spiral band 2a formed by the above-mentioned unwinding is not twisted in the winding contraction direction or the opposite direction, but is drawn out from the inner circumference to form the coil strip. You can unwind and go. Further, it is possible to overcome the change in the inner diameter of the coil strip 2 due to the progress of unwinding and to perform the unwinding of the coil strip in advance.

Coil strip 2 according to specifications (I) and (II)
Rotating in a predetermined direction, leaving it unrotated, advancing the stationary lower unwinding, interrupting the unwinding, stopping the rotation, restarting the unwinding,
It suffices to set the time length in a general manner in consideration of the change in the inner diameter of the coil strip 2, and the coil strip 2 may be rotated continuously or intermittently. That is, the strip spiral band 2b from the "source" of the unwinding of the coil strip 2 (the starting end of the unwinding) to the end of the inner surface of the tube 3 where the liner 5 is formed is generally at least 2 m long. The length of the coil strip 2 is sufficient to absorb the kinking of the spiral band 26 due to a slight error, even when the time length of these events of the coil strip 2 and the temporal length are set roughly.

In the case of the illustrated type, the motor M or m is used to switch the rotation, rotation direction and rotation stop of the coil strip 2.
It may be performed by turning on / off the switch, and changing the rotation direction. In the case of manual rotation, the manual operation may be switched.

In the example shown in FIGS. 1 and 2, the bar 1 facing the end face of the coil strip 2 on the pull-out side and extending in the lengthwise direction extending in the radial direction of the coil strip 2.
2 and 12 are arranged. The bars 12 and 12 prevent the coil strip 2 from being pulled out from the inner periphery by a large number of layers at one time, and ensures that the coil strip 2 is smoothly unwound. The bars 12, 12 are support bars 13, 13 extending from the frame 11 of the gantry 1 to the pull-out side of the coil strip 2.
It is slidably fitted to sleeves 14, 14 fixed to the tip.

The bars 12, 12 are preferably adjusted in the lengthwise direction so as to correspond to the expansion of the inner diameter due to the progress of unwinding of the coil strip 2 and the tips of the bars 12 and 12 in accordance with the inner diameter of the coil strip to be used.

[0025]

As is apparent from the above description, the present invention, in the pipe lining construction of the type described at the beginning, does not twist the spiral band of the strip formed by winding and unwinding it from the inner circumference. The coil strip can be unwound and removed, and the change in inner diameter of the coil strip due to the progress of unwinding can be overcome. Therefore, according to the present invention, it is possible to efficiently carry out the lining construction of the pipe by using the long-wound coil strip which has been impossible in the past.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a coil strip unwinding mode according to the present invention, together with an example of a gantry on which a coil strip is mounted.

FIG. 2 is a perspective view showing another example of the unwinding mode of the coil strip according to the present invention together with the same stand.

FIG. 3 shows a front view of a roll type support arm in the gantry shown in FIGS.

FIG. 4 (A) is a side view showing another example of a frame on which a strip is placed by vertically cutting it, and FIG. 4 (B) is a front view of a rotary drum in the frame.

5 is an enlarged cross-sectional view of a claw portion of the rotary drum in the mount shown in FIG.

FIG. 6 is a cross-sectional view showing an outline of a construction aspect of the method of the present invention.

[Explanation of symbols]

 1 Stand 10 Roll-type Support Arm 11 Vertical Support Arm on the Stand M Motor of Roll-type Support Arm 15 Claws 16 Rotary Drum on the Stand m Motor of the Drum 2 Coil Strip 2a Strip Spiral Band 2c Multiple Winding Layers on Inner End Side of Coil Strip 20 Inner coil

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Kamide 7-6, Eizashi-cho, Tennoji-ku, Osaka-shi, Osaka Incorporated company, Osaka Waterproof Construction Co., Ltd. (72) Tsuneo Miyagawa 1-2-2, Hatchobori, Chuo-ku, Tokyo No. 8 Inside Kubota Corporation (72) Inventor Naoya Ozeki 1-2-2 Hatchobori, Chuo-ku, Tokyo Inside Kubota Construction Ltd. (72) Inventor Yuji Sakuma 64, Ishizukita-machi, Sakai-shi, Osaka Kubota Vinyl Pipe Factory Co., Ltd. (72) Inventor Kazuhiro Hirao 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory Co., Ltd.

Claims (2)

[Claims] 1. A coil strip is pulled out from an inner circumference and unwound, and is wound around an inner circumferential surface of a pipe to be processed by a spiral in a winding direction according to the spiral of the strip formed by the unwinding, and the winding is adjacent to the winding. In the lining construction of the pipe to be joined as a liner by joining the side edges, the inner diameter of the coil strip installed at a required location is d, the inner diameter of the pipe to be constructed is D, and the strip is d < During D, the strip is rotated in the direction opposite to the coil winding direction, and when the unwinding progress of the coil strip becomes d> D, the strip is rotated in the same direction as the coil winding direction, and d = D or d becomes approximately D. Pipe lining construction method characterized by not rotating when equal. 2. A coil strip is pulled out from an inner circumference and is unwound, and is wound around an inner circumferential surface of a pipe to be processed by a spiral in a winding direction according to the spiral of the strip formed by the unwinding, and the winding is adjacent to the winding. Joining the side edges, in the lining construction of the pipe to be the liner, the coil strips installed at the required locations are intermittently unwound, and each time the winding is unwound, the coil strips are initially unwound under rest. When the inner diameter of the coil strip becomes larger than the inner diameter of the pipe to be processed due to the progress of unwinding, the unwinding is stopped and the coil strip is rotated in the same direction as the coil winding direction. When the inner coil portion is derived from the coil strip by shrinking, and the inner diameter or outer diameter of the inner coil portion becomes substantially equal to the inner diameter of the pipe to be constructed, Lining construction methods of the tube, characterized in that stops rotation of yl strip resume unwound.