JPH07107288B2 - Installation method of pipe making machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method of installing a pipe manufacturing machine for a spiral pipe formed by spirally winding a synthetic resin strip.

(Prior art) Large-diameter pipes used for civil engineering work require a pipe-making machine to be installed on the construction site because long transportation costs are required to transport the products manufactured at the factory to the construction site. A technique of spirally winding the pipe-shaped body while successively feeding the strip-shaped body from a wound body to produce a pipe is known. And this conventional technology is also applied to the technology of lining the inner surface of the existing pipe in the state of the buried fence for the rehabilitation of the existing pipe that has deteriorated such as water supply and sewerage.
This applied technology is disclosed in Japanese Patent Laid-Open No. 61-48690.

(Problems to be solved by the invention) When installing a pipe manufacturing machine, it is necessary to center the existing pipe and perform it in accordance with this, but conventionally, the installation of the pipe manufacturing machine in the upstream manhole was performed. Since the inside of the existing pipe was separately viewed from the manhole on the downstream side according to the work and the position for the centering was adjusted according to the direction of the moving direction by visual measurement, the work required a lot of time and labor. There was a point.

(Means for Solving Problems) The method for installing a pipe manufacturing machine according to the present invention is made to solve the problems of the above-mentioned conventional technology, and includes a rotating shaft and an axis around the rotating shaft. The centering jig is composed of at least three legs arranged at equal intervals, and the legs simultaneously expand and contract by an equal length in the direction orthogonal to the rotation axis by the rotation of the rotation axis. Insert into the existing pipe to perform centering,
A leveling jig having horizontal rods with legs having a length substantially equal to the height of the axis of the pipe-making machine suspended from both ends is provided with a through hole formed in the center of the horizontal rods in the horizontal direction. After inserting the centering jig through the rotary shaft, adjust the height of the base leg with the leg end of the leveling jig as a reference, and set the position substantially horizontally at a predetermined position and height. Remove the centering jig and leveling jig,
The gist is a method of installing a pipe manufacturing machine, which is characterized in that the pipe manufacturing machine is installed on a base.

The leg of the centering jig used in the present invention may be a combination of two rods in an X shape or a V shape.

(Operation) In the installation method of the pipe manufacturing machine of the present invention, the axis of the existing pipe can be virtually extended to the outside by the centering jig, and the base is placed below the virtual axis by a predetermined distance. Can be installed. For this reason, the axis of the spiral tube produced by the tube making machine installed on the base substantially coincides with the axis of the existing tube.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

3 (A) and 3 (B) show an embodiment of the centering jig 1 used in the present invention. FIG. 3 (A) is a front view thereof, and (B) is a left side view thereof. . A handle 2 is detachably provided at the rear end, and a rotary shaft 4 supported by a bearing 3 is provided at the front end.
, And three legs 5 arranged at equal intervals around the axis of the rotating shaft 4, and a male screw portion 6 is screwed on the rotating shaft 4 in the longitudinal direction of the outer peripheral surface thereof. The male screw portion 6 has a rotating shaft 4
A moving ring body 7 in which a female screw is screwed is screwed onto the inner surface that moves the male screw part 6 in the front-rear direction by the rotation. The leg body 5 is composed of two telescopic rods 8 and 9 combined in an X shape.
And a fixing rod 10 installed between the outer ends of the expanding and contracting rods 8 and 9 in parallel with the rotating shaft 4. The inner end of the expanding and contracting rod 8 moves to the bearing 3, and the inner end of the same 9 moves. When the handle 2 is attached to the ring body 7 and the handle 2 is rotated in the left-right direction, the moving ring body 7 moves the male screw portion 6 in the front-rear direction, and accordingly, the rods 8, 9, 10 are connected.
Is rotated around each fulcrum 11 to 15 and each fixing rod 10, 10
Move inward and outward at the same time. At this time, the fulcrum 15 slides in the elongated hole 16 provided in the fixing rod 9.

FIG. 4 shows a leveling jig 20 used in the present invention, in which the centering jig 1 is horizontally arranged at the center of the horizontal rod 21.
A through hole 22 into which a shaft core 18 of the pipe is inserted is bored, and legs 23, 23 having a length substantially equal to the height up to the shaft core of a spiral pipe manufactured by a pipe manufacturing machine are vertically provided from both ends. There is. Level on the top of the horizontal rod 21
24 is stuck.

FIG. 5 shows a substrate 30 used in the present invention,
It consists of a plate with a substantially U-shape, and the height adjustable legs 31 at the four corners.
Is provided, and pipe forming machine sliding grooves 32 are formed on the upper surfaces of the two substantially U-shaped parallel sides.

Next, the installation method of the present invention will be described with reference to FIGS.
In FIG. 1, first, the base 30 is placed on the bottom of the manhole 50. Next, insert the centering jig 1 into the existing pipe 60,
Turn the handle 2 clockwise (to the right) to rotate the three legs 5.
The fixing rod (10) is extended until it comes into contact with the pipe wall, and the existing pipe is centered. At this time, it is necessary to fix the bearing 3 and the movable ring body 7 against the rotational force of the rotary shaft 4, and they are normally fixed manually. However, when manual fixing is not possible,
The bearing 3 may be fixed to another jig fixed to the tube wall, and a rotating shaft near the handle 2 may be provided with a handle so that the handle can be appropriately manipulated. Next, only the handle 2 is removed from the rotary shaft 4, and the leveling jig 20 is inserted into the rotary shaft 4 through the through hole 22.

In this way, the end portions of the legs 23 of the leveling jig 20 located above the front side of the base plate 30 have the two corner portions 33 on the front side of the base plate 30,
Base so that it contacts 33 or a specified place near it.
Adjust the stud bolt 31 on the bottom of 30. At this time, it is preferable to adjust the jack bolt 31 so that the level 24 attached to the horizontal rod 21 is horizontal. Then, the leveling jig 20 is slid along the rotary shaft 4 to be positioned above the rear side of the base 30, and similarly to the above, the corner portions 34, 34 or the end portions of the legs 23 at predetermined positions in the vicinity thereof. Adjust the jack bolt 31 so that they touch.

In this way, after the base 30 is installed substantially horizontally at a predetermined position and height, the centering jig 1 and the leveling jig 20 are removed. After that, the legs 41 of the pipe making machine 40 are fitted into the grooves 32 on the upper surface of the base 30, and the pipe making machine 40 is installed as shown in FIG.

(Effect of the invention) Since the installation method of the pipe making machine of the present invention is configured as described above, the pipe making machine is made so that the axis of the spiral tube to be produced is substantially coincident with the axis of the existing tube. Can be installed accurately in a short time.

[Brief description of drawings]

1 and 2 are explanatory views showing the installation method of the pipe manufacturing machine,
3 (a) and (b) are a front view and a left side view showing an example of a centering jig used in the present invention, and FIG. 4 is a perspective view showing an example of the leveling jig, and FIG. FIG. 3 is a perspective view showing an example of a base as well. DESCRIPTION OF SYMBOLS 1 ... Centering jig, 4 ... Rotation axis, 5 ... Leg body, 20 ... Leveling jig, 21 ... Horizontal rod, 22 ... Through hole, 23 ... Leg, 30 ... Base, 40 ... Pipe making machine,

Claims (1)

[Claims] 1. A rotating shaft and at least three or more legs arranged at equal intervals around an axis of the rotating shaft, the legs being in a direction orthogonal to the rotating shaft due to rotation of the rotating shaft. The centering jig, which is designed to expand and contract by the same length at the same time, is inserted into the existing pipe to perform centering, and legs with a length approximately equal to the height up to the axis of the pipe making machine are hung from both ends. A leveling jig having a horizontal rod is inserted into the rotary shaft of the centering jig through a through hole formed in the center of the horizontal rod in the horizontal direction, and the leg of the leveling jig is inserted. After adjusting the height of the legs of the board based on the edges and installing it at a predetermined position and height approximately horizontally, remove the centering jig and leveling jig and install the pipe making machine on the board. A method for installing a pipe manufacturing machine, which comprises: