JPS6227590Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a leading pipe propulsion device for a pipe burying excavator.

As shown in Fig. 1, this type of leading pipe propulsion device is used in a construction method in which a small diameter leading pipe 1 is accurately propelled and buried from a starting shaft A to a reaching shaft B, and then a medium diameter pipe is buried. It is to be buried.

FIG. 2 shows the swinging section 2 of a conventional leading pipe propulsion device.

FIG. 2 shows the shape of a conventional swinging section, in which an excavation tool 1 is mounted on the swinging section 2. As shown in FIG.

FIG. 3 shows a conventional swinging unit propulsion state, in which the swinging unit 2 rotates and excavates earth and sand with the attached excavation tool 1.

As shown in FIG. 3, by giving a swinging angle α to the swinging part 2, a consolidation part 3 is generated between the earth and sand and the leading pipe propulsion device. This compacted portion 3 propels the leading pipe propulsion device upward.

When a swinging angle is applied opposite to that shown in FIG. 3, the leading tube propulsion device is propelled downward.

By repeating this operation, the guide pipe can be buried in the target position while performing direction repair.

This swinging section 2 is a cutter drum, and the swinging section 2
As shown in FIG. 4, it is oscillated via a spherical support member 5 by the operation of a oscillating jack 4.
Further, the swinging section 2 is rotated by a hydraulic motor 7 via a reduction gear 6.

The outer circumferential shape of the swinging part 2 of the conventional guide pipe propulsion device is a straight cylinder, and therefore the compaction part 3 is small as shown in FIG. 3, and the direction correction ability is small.

The present invention was developed in view of the above circumstances, and its purpose is to increase the number of consolidated parts compared to the consolidated parts created by conventional equipment, and to provide more direction correction ability with the same swing angle as the conventional equipment. An object of the present invention is to provide a lead pipe propulsion device for a pipe burying excavator.

Hereinafter, the present invention will be explained with reference to FIGS. 5 and 6.

In the drawing, 10 is a propulsion unit main body, 11 is a swinging portion as a cutter drum, and 12 is a cutter. The swinging portion 11 is swing-operated by a swinging jack, as in the conventional device, and is rotationally driven by a hydraulic motor.

The outer peripheral portion of the swinging portion 11 is formed into a conical surface 14, and the diameter increases toward the tip.

However, when the swinging section 11 is tilted to the maximum swing angle α, a compaction section 13 is generated between the earth and sand and the leading pipe propulsion device as shown in FIG. This is larger than the consolidated area created by conventional equipment.

This compacted portion 13 is generated to correct the direction of the leading pipe propulsion device.

The present invention has been described in detail above, and the outer circumferential shape of the swinging section 11, which is swingably and rotatably provided at the tip of the propulsion section main body 10 and excavates earth and sand, becomes larger toward the tip. Since it has a conical shape with a diameter, there are more consolidated parts than those created by conventional devices, and more direction correction ability can be obtained with the same swing angle as the conventional device.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the medium-diameter pipe burying method, Fig. 2 is a side view of the swinging part of a conventional leading pipe propulsion device, Fig. 3 is an explanatory diagram of the same operation, and Fig. 4 is an explanatory diagram of the pipe burying excavator. 5 is a side view of one embodiment of the present invention, and FIG. 6 is an explanatory view of the same operation. 10 is a propulsion unit main body, and 11 is a swinging unit.

Claims (1)

[Scope of utility model registration request] The outer circumferential shape of the swinging part 11 which is swingably and rotatably provided at the tip of the propulsion part main body 10 and excavates earth and sand is made into a conical shape that becomes larger in diameter toward the tip. Lead pipe propulsion device for pipe burying excavators.