JPH0441239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a buried pipe propulsion device for pipe burying work using a propulsion method.

Conventional technology Generally, in the propulsion method, a lead-excavating device called a shield excavator is placed at the tip of the propulsion pipe to be buried, and a propulsion device called a moto-pusher device is placed at the rear end. Push the tube with the pushing device,
When pushing one tube is completed, the jack of the main pusher is retracted, the next pipe is pushed between the front pipe and the main pusher, and the two pipes are pushed together. Thereafter, by repeating this adding and pushing operation, the pipes can be successively buried. However, since the propulsion force is limited by the strength of the tube with only the original pushing device, there is a limit to the distance that can be propelled. For this reason,
Usually, a tube propulsion device called an intermediate push device is inserted between the tubes at an appropriate position, and the tube forward of the intermediate push device is propelled by the intermediate push device, and the tube behind the intermediate push device is propelled. A method using a pushing device is adopted.

Conventionally, this intermediate pushing device, that is, the tube propulsion device,
This is shown in Japanese Unexamined Patent Publication No. 57-29793. In this device, a plurality of jacks consisting of hydraulic pistons and cylinders are inserted between the tubes and in the circumferential direction.

Problems to be Solved by the Invention According to the above-mentioned conventional structure, once the arrangement is inserted between the pipes, it cannot be changed. Propulsion resistance may increase due to changes, etc., and propulsion may become impossible. Although it is not impossible to change the jacks by force, it is difficult to replace the jacks one by one in a narrow pipe, and it is not possible to replace the jacks if the pipe diameter is small.

Therefore, an object of the present invention is to provide a buried pipe propulsion device that can solve the above problems.

Means for Solving the Problem In order to solve the above problem, the buried pipe propulsion device of the present invention configures a cylindrical body by arranging first to fourth divided bodies each having a substantially 1/4 circular shape in a cylindrical shape. , a guide body is provided along the circumferential direction of the first divided body, and a pair of left and right slide members are slidably engaged with the guide body, and one of the integrated slide body and the first divided body is provided. One side end side of the second divided body adjacent to the side is connected via the first link, and one side end side of the third divided body adjacent to the other side of the other slide body and the first divided body are connected via a second link, and the other end of the second divided body and one end of the fourth divided body are connected via a first connecting pin, and the other side of the third divided body is connected through a first connecting pin. A first jacking device is provided that connects the end side and the other end side of the fourth divided body via a second connecting pin, and moves both guide members toward and away from each other via the first and second links, and A pair of these cylindrical bodies are arranged in front and behind each other, and a second jacking device is provided for moving these cylindrical bodies toward and away from each other.

Effect In the above configuration, after the first jacking device presses the first divided body outward to fix the front and rear cylindrical bodies to the inner surface of the buried pipe, the second jacking device pushes the front cylindrical body. , the buried pipe can be propelled, and by retracting the first divided body inwardly by the first jacking device, each cylindrical body becomes smaller and can be easily moved.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 7. In Figs. 1 to 4, reference numeral 1 indicates a pair of cylindrical bodies arranged at the front and rear, each approximately 1/2
Four circular first to fourth divided bodies 2 to 5 are arranged in a cylindrical shape. Reference numeral 6 designates a pair of guide rails (guide bodies) arranged on the left and right inner peripheries of the first divided body 2 and along the circumference, respectively. A pair of left and right slide members 7A and 7B are slidably engaged in the guide grooves 6a of these guide rails 6 in the circumferential direction. 8 is a first link that connects the one slide member 7A and one side end of the second divided body 3, and 9 is the other slide member 7B.
This is a second link that connects the one side end portion of the third divided body 4 to each other. In addition, since each of these links 8, 9 and each divided body 2, 3, 4 are connected via a first connecting pin 10 parallel to the axis of the cylindrical body,
The first divided body 2 has the following characteristics with respect to the other divided bodies 3, 4, and 5:
Can move a little in a vertical plane. Further, the other end of the second divided body 3 and one end of the fourth divided body 5, and the other end of the third divided body 4 and the other end of the fourth divided body 5 are They are connected by a second connecting pin 11 having an axis parallel to the first connecting pin 10 . Reference numeral 12 denotes a first jacking device of a hydraulic piston-cylinder type installed across the first link 8 and the second link 9, and is used to move these links 8 and 9 toward and away from each other. Incidentally, the connecting members (links 8, 9, pins 10, 11, etc.) between the divided bodies 2 to 5 and the first jacking device 12 are provided at two locations in the cylindrical body 1, front and rear. Reference numeral 13 denotes moving tools provided at front, rear, left and right positions within the cylindrical body 1, and are used when moving the cylindrical body 1. That is, this moving tool 13 has a first pipe 14 hanging down from the first divided body 2 and a fourth divided body 5 that is suspended upward from the fourth divided body 5, and its upper end is movably inserted into the first pipe 14. moving wheels 17 that are attached to the lower end of the first pipe 14 and can come into contact with the inner surface of the buried pipe 16.
It is composed of. 18 is a hydraulic piston/cylinder type second jacking device for moving the rear pair of cylindrical bodies 1A, 1B toward and away from each other;
They are installed in a total of four locations: left, right, top, and bottom. That is, brackets 19 are provided above and below the mutually opposing ends of the second and third divided bodies 3 and 4 of each cylindrical body 1A and 1B.
are provided, and the corresponding brackets 19 are connected to each other by a second jacking device 18. 20 is a steel collar provided around both buried pipes 16, 16. Each of the divided bodies 2 to 5 is provided with a sufficient gap (a) so that they can move relative to each other, and although not shown, rubber is pasted on the outer peripheral surface of each of the divided bodies 2 to 5. There is.

Therefore, in the above configuration, when the buried pipe 16 is pressed inside, each of the first cylindrical bodies 1A and 1B is
The jacking device 12 is extended to connect the first link 8 and the second link.
The link 9 is separated from the link 9. Then, the first divided body 2
is pressed outward and each of the remaining divided bodies 3,
4 and 5 are also expanded, and both cylindrical bodies 1A and 1B are fixed within the buried pipe 16 (see FIGS. 3 and 4).
In this state, if each of the second jacking devices 18 is extended simultaneously, the buried pipe 16 in the front is propelled. Note that, at this time, the moving wheels 17 do not come into contact with the inner surface of the buried pipe 16 because the first divided body 2 is moving upward. Moreover, the propulsive force of the second jacking device 18 is reliably transmitted to the buried pipe 16 side by the frictional force between the rubber attached to the surface of each of the divided bodies 2 to 5 and the buried pipe 16.

By adjusting the amount of expansion and contraction of each of the second jacking devices 18, the direction of pushing the buried pipe 16 can be changed as shown in FIG. can also be used.

Next, when changing the entire buried pipe propulsion device, that is, when moving it, by contracting each first jacking device 12, the first divided body 2 moves downward a little, and each cylindrical body 1A, As 1B becomes smaller,
When the moving wheels 17 are lowered, each cylindrical body 1A, 1B
Since it is supported by the inner surface of the buried pipe 16 (see FIGS. 5 and 6), it can be moved to any position.

Effects of the Invention According to the configuration of the present invention described above, each of the pair of front and rear cylindrical bodies arranged in the buried pipe is composed of four divided bodies, and one of the divided bodies is made movable in the radial direction. Therefore, each cylindrical body can be fixed and moved freely with respect to the buried pipe, and therefore the entire propulsion device can be easily changed.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which FIG. 1 is an overall vertical sectional view, FIG. 2 is a view taken in the direction of the - arrow in FIG. The figure is a view corresponding to the − arrow in FIG. 1, FIG. 5 is a view corresponding to the − arrow during operation, and FIG. 6 is a view corresponding to − during operation.
The arrow-view equivalent diagram, Figure 7, shows the − during curved construction.
FIG. 1, 1A, 1B...Cylindrical body, 2...First divided body,
3...Second divided body, 4...Third divided body, 5...Fourth divided body, 6...Guide rail (guide body), 7A, 7B
...Slide member, 8...First link, 9...Second link, 10...First connection pin, 11...Second connection pin,
12...first jacking device, 13...movement tool, 16...
Buried pipe, 17...Movement wheels, 18...Second jacking device.

Claims (1)

[Claims] 1 A cylindrical body is constructed by arranging first to fourth divided bodies each having a substantially 1/4 circular shape in a cylindrical shape, and a guide body is provided along the circumferential direction of the first divided body, and the guide A pair of left and right slide members are slidably engaged with the body, and one slide member and one end side of the second divided body adjacent to one side of the first divided body are connected to the first divided body.
At the same time, the other sliding body and one end side of the third divided body adjacent to the other side of the first divided body are connected through a second link, and the second divided body is connected through a link. The other end side and one end side of the fourth divided body are connected via the first connecting pin, and the other end side of the third divided body and the other end side of the fourth divided body are connected to each other via the first connecting pin.
A first jacking device is provided that connects through a connecting pin and moves both guide members toward and away from each other through the first and second links, and a pair of these cylindrical bodies are arranged in front and behind, and these cylindrical bodies A buried pipe propulsion device characterized by being provided with a second jacking device for moving comrades closer to each other and separating them from each other.