JPS644959Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a buried pipe propulsion method in which a guide pipe with a cutting edge is attached to the tip of the buried pipe, and the buried pipe is press-fitted while digging underground. It is related to the device.

[Conventional technology and its problems]

In such a buried pipe propulsion device, the cutting edge of the leading pipe is loosely fitted to the tip of the leading pipe, and the direction of the leading pipe and the buried pipe can be corrected by attaching a jack to the back of the cutting edge and changing the direction of the cutting edge. A casing with a screw inserted inside the leading pipe and the buried pipe is installed to form a double pipe structure, and a support is attached to the rear end of the buried pipe to push the buried pipe forward. A screw driving device connected to the screw shaft is installed behind the support.

By the way, unlike the case of burying large-diameter pipes used for tunnel excavation, etc., the above-mentioned propulsion device is used for burying pipes with a diameter of about 250 to 500, such as water pipes and electric conduit pipes. Therefore, before making direction corrections, it is necessary to check whether or not the lead pipe and buried pipe are proceeding in a direction that deviates from the planned direction.
Even if measurements were to be made using a horizontal detection device such as a transit, it would be extremely difficult to secure horizontal space for this purpose.

As an example, as shown in Japanese Patent Application Laid-Open No. 51-31017, it is possible to use the gap between the buried pipe and the internal casing to provide a target, etc. deep therein. In a propulsion system, the drive unit at the rear is usually larger than the buried pipe at the front, and these take up space, so as shown in this Japanese Patent Application Laid-Open No. 51-31017, it is necessary to install an appropriate section above the drive motor, etc. It is impossible to secure space.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
An object of the present invention is to provide a buried tube propulsion device that can secure a space for direction correction even in a small diameter buried tube propulsion device.

[Means for solving problems]

In order to achieve the above object, the present invention attaches a leading pipe with a movable cutting edge to the tip of the buried pipe, attaches a support that slides on the base with jacks to the rear end of the buried pipe, and , in which a screw drive device is installed that runs vertically through the casing in the lead pipe and the buried pipe, a space is formed between the inner surface of the buried pipe and the upper surface of the casing, and a detected device for detecting the direction of propulsion is provided at the tip of the space. The support body is provided with a through hole at the rear extension position of this space, and the drive device includes a sprocket on the rear end side of the screw, a sprocket on the drive shaft side of the motor, and a chain that connects both sprockets at a predetermined interval. and are housed in a sealed case, and further provided with a through space in the sealed case at a position surrounding the chain and corresponding to the through hole, which is independent of the storage part of both sprockets and the chain, The gist is that a horizontal detection device for detecting the detected device is provided behind these through holes and the through cylinder.

[Effect]

According to the present invention, the horizontal detection device placed in the direction of the independent through space detects the detected device on the horizontal axis through the through hole of the front support and the space between the inner surface of the buried pipe and the top surface of the casing. be able to.

Furthermore, even if the sealed case of the drive device is filled with oil, no problem will occur because the through space is formed of a cylindrical body and is independent, ensuring airtightness within the case.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the preferred embodiment of the present invention will be described in detail with reference to the drawings.

Attach the leading pipe 2 to the tip of the buried pipe 1, and
A cutting edge 3 with a tapered outer peripheral surface at the tip of the blade.
loosely fit, and attach the hydraulic jack 4 for direction correction to the back of the blade mouth 3.

A casing 5 is inserted into the buried pipe 1 and the leading pipe 2, a screw 6 is passed through the casing 5, an auger head 7 is attached to the tip of the screw 6, and the auger head 7 is positioned in front of the cutting edge 3.

A space 8 is formed between the upper surface of the casing 5 and the inner wall surface of the buried pipe 1, and a target 9 for horizontal displacement measurement attached to the back surface of the leading pipe 2 is installed at the tip of the space 8.

The rear end of the buried pipe 1 is slid onto a base 10 and fitted into a support 12 having an earth and sand discharge port 11, and a propulsion jack 13 is attached to the support 12.

In the figure, reference numeral 14 denotes a drive device for the screw 6, which is a sprocket 1 provided on the rear end shaft 6' of the screw 6 in a vertically elongated sealed case 22 rising upward.
7 and a sprocket 16 provided on the rotating shaft of the motor 15 are housed at a predetermined interval, and these sprockets 16 and 17 are connected by an endless chain 18. Although not shown, the sealed case 22 is filled with oil for both lubrication and heat insulation.

A through hole 19 is provided in the support body 12, and a sprocket 1 is provided in the sealed case 22 of the drive device 14.
A penetrating cylindrical body 20 made of a circle or a rectangular tube is provided at a portion vertically surrounded by the chain 18 between the sprockets 16 and 17 of the sealed case 22, and the penetrating space 20 is independent of the sprockets 16 and 17 of the sealed case 22 and the housing portion of the chain 18. ′
, and a through hole 19' is provided in the vertical plate behind it. These through holes 19, 19' and through space 20' are connected to the buried pipe 1 and the casing 5.
They are placed side by side in the horizontal direction at the rearward extension of the space 8 between them, and the transit 21 is installed at the rear.

It is also possible that the sprockets 16, 17 are connected by a plurality of endless chains with another shaft interposed therebetween.

Next, to explain how to use it, motor 15
When the engine is started, the screw 6 is connected via the sprocket 16, endless chain 18 and sprocket 17.
Then, the auger head 7 rotates, and the earth and sand in front of the cutting edge 3 of the leading pipe 2 is excavated by the auger head 7 and carried inside the casing 5 by the screw 6.
It is discharged from the earth and sand discharge port 11.

At the same time, if the propulsion jack 13 is extended, the support body 12, the buried pipe 1, and the leading pipe 2 move forward.

To know whether or not the buried pipe 1 is moving in the correct direction, look into the transit 21 to locate the target 9 in the space 8 between the buried pipe 1 and the casing 5, and in the through hole 19 of the support 12. , and can be seen through the through space 20' of the drive device 14 and the through hole 19' behind it, and at the position of the target 9, it can be determined whether the direction of propulsion of the leading pipe 2 and the buried pipe 1 is in the predetermined direction. be able to.

To correct the direction if necessary, operate the hydraulic jack 4 and direct the cutting edge 3 in the direction in which the direction is to be corrected, and the leading pipe 2 and buried pipe 1 will proceed in that direction.

In the above embodiment, only the case where the transit and the target are used as means for detecting the propulsion direction of the buried pipe has been described.
It is also possible to detect the propulsion direction of the buried pipe by replacing it with a light receiver.

[Effect of idea]

As described above, the buried pipe propulsion device of the present invention can accurately measure the propulsion direction of the leading pipe and the buried pipe using the horizontal detection device, and when using the horizontal detection device, the buried pipe propulsion Even if the support body and the drive device for the soil removal screw are located in front, they do not get in the way.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the buried pipe propulsion device of this invention, and FIG.
A sectional view and FIG. 3 are partially omitted plan views. 1... Buried pipe, 2... Leading pipe, 3... Blade mouth, 4
... Hydraulic jack, 5 ... Casing, 6 ... Screw, 7 ... Auger head, 8 ... Space section, 9 ... Target, 10 ... Base, 11 ...
Sediment discharge port, 12...Support, 13...Propulsion jack, 14...Drive device, 15...Motor, 1
6, 17... Sprocket, 18... Endless chain, 19, 19'... Through hole, 20... Penetrating cylinder,
20'...through space section, 21...transit,
22... Sealed case.

Claims (1)

[Scope of utility model registration request] Attach a leading pipe with a movable cutting edge to the tip of the buried pipe, attach a support that slides on the base with jacks to the rear end of the buried pipe, and pierce the leading pipe and the casing inside the buried pipe vertically behind the support. In this device, a space is formed between the inner surface of the buried pipe and the upper surface of the casing, and a detected device for detecting the direction of propulsion is provided at the tip of the space, and the support is provided with a space behind this space. A through hole is provided at the extended position, and the drive device connects the sprocket on the rear end side of the screw, the sprocket on the drive shaft side of the motor, and the chain that connects both sprockets with a predetermined interval in the vertical direction in a vertically long sealed case. Furthermore, in the sealed case, a through space independent of the storage area of both sprockets and the chain is provided at a position surrounding the chain and corresponding to the through hole, and the through hole and the through hole are A buried pipe propulsion device characterized in that a horizontal detection device for detecting the detected device is provided at the rear of the space.