JPS6145098A - Leading apparatus of pipe propelling and embedding apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a leading device in an apparatus for propelling and burying a pipe underground while consolidating earth and sand.

BACKGROUND TECHNOLOGY As shown in FIG. 5, in a device for propelling and burying a pipe 3 from a starting shaft 1 by a propelling jack 2 with a leading device 4 at the head, a consolidating head 6 is used as the leading device 4 in a main body 5 of the device. As shown in FIGS. 6(a) and 6(b), after the consolidation head 6 is extended to consolidate the earth and sand A, the pipe 3 is moved together with the device main body 5 by the propelling jack 2 as shown in FIG. 6(C). There is a known device that moves the object forward.

Problems to be Solved by the Invention The above-mentioned leading device has a compaction head 6 in front of the compaction head 6, as shown in FIG. As the upper A' accumulates, the resistance gradually increases, and eventually it becomes impossible to push it forward, so the pipe cannot be buried over a long distance and cannot be applied to hard ground.

There are various known devices for propelling and burying pipes in hard ground, such as those that use excavation heads to rotatably excavate earth and sand and then propel and bury the pipes while removing the earth. There are problems such as under the ground law due to over-incorporation.

Means for Solving Problems and Functions An auger is rotatably inserted into a device body having a discharge port, and a baffle plate is provided at the rear end of the discharge port to prevent the transport of earth and sand. The soil is compacted within the device itself, increasing the earth pressure and being discharged outward from the discharge port.

Embodiment FIG. 1 is a cross-sectional front view, in which the leading device has a cylindrical cutting edge II rotatably provided at the tip of a cylindrical device main body 10, and an auger 12 rotatably inserted therein. A pipe 13 is continuous to the rear end of the device main body 10, and a plurality of discharge ports I4 are formed in the intermediate portion at symmetrical positions on the circumference.

The auger 12 has a spiral blade 16 on the tip side of the auger shaft I5.
It is rotated and slid in the longitudinal direction by a device in the starting shaft (not shown), and
A cutter 17 is fixed to the tip surface 16a of the blade 16, and a lever 18 is fixed to the tip of the auger shaft 15.

The rear end +6b of the blade 16 is not spirally folded to form a disk and serves as a baffle plate for preventing the transport of earth and sand, and the rear end +6b is located near the discharge port 14.

The blade opening 11 is cylindrical, and the lever 18 is provided on the inner peripheral wall.
A stopper 19 that interferes with the rotational direction is provided, and a discharge port 20 is formed in a part of the peripheral wall.

Next, the operation will be explained.

■When driving straight ahead without changing direction.

The auger I2 is moved rearward as shown in FIG.
Located at the rear end, rear end +2' (rear end 1 of the blade 16
6b) is positioned rearward from the discharge port 14, and the stopper 19 and lever 18 do not interfere with each other.

In this state, when the auger 12 is rotated and a propulsion jack (not shown) applies a propulsive force, the dirt in front of the cutting edge 11 enters inside and is transported backward by the auger 12, but the rear end 12'' of the auger 12 is circular. Since the blade has a plate-like rear end +6b, the transported earth and sand becomes a dead end at that part and is trapped in the rear end of the auger 12, and as the propulsion progresses, the earth pressure inside the device body 10 increases. The pressure becomes higher than the pressure of the earth and sand B on the outer circumference, and it is discharged outward from the discharge ports 14.14 formed at symmetrical positions on the circumference.
It can be propelled and buried while maintaining straightness without applying unbalanced loads.

In this way, the dirt is taken in by the auger 12 in front of the cutting edge 11 and discharged from the middle of the device main body 10 through the discharge port 14, so that the dirt is not consolidated in front of the leading device and can be used for a long distance. In addition to being able to bury the pipe over a long distance, there is no need to actively excavate the earth and sand in front of the system, so there will be no ground subsidence.

■When a deviation in the propulsion direction is measured by a means such as a transit (not shown), and the propulsion direction needs to be corrected.

As shown in FIG. 3, the auger 12 is moved slightly forward so that the lever 18 and the stopper 19 interfere with each other, and the auger 12 is rotated by a predetermined angle, and the blade opening 11 is rotated by a predetermined angle. The position is opposite to the correction direction in the circumferential direction.

Then, as shown in FIG. 4, the auger 12 is moved further forward so that it projects slightly further forward than the discharge port 20. At this time, there is no interference with the stopper + lever 18.

In this state, when the auger 12 is rotated and a propulsive force F is applied, the earth and sand transported backward by the auger 12 is pushed into the device main body 10 as described above, and the earth pressure increases, and the discharge port 14. As well as being discharged further outward, the blade opening 11
Since the soil is pushed outward from the discharge port 20, the pushed out soil receives a reaction force from the surrounding soil and is pushed out from the discharge port 20.
An unbalanced load in the opposite direction acts, and the propulsion direction is changed or corrected as shown by arrow C.

Therefore, the propulsion direction can be changed with a simple mechanism.

Effects of the Invention Since no consolidated earth and sand accumulates in front of the pipe, the pipe can be propulsion buried over a long distance.

Since the earth and sand in front are actively excavated and discharged, there is no ground subsidence, and there is no need to dispose of the earth and sand.

[Brief explanation of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIGS. 3 and 4 are operation explanatory diagrams,
Figure 5 is an overall view of the conventional example, Figure 6 (a) t (b)
l (C) is an explanatory diagram of the operation. 10 is the main body of the device, 12 is an auger, and 14 is a discharge port.

Claims (1)

[Claims] An auger 12 is rotatably inserted into the cylindrical device main body 10, and a plurality of discharge ports 14 are formed in the longitudinally intermediate portion of the device main body 10 at symmetrical positions in the circumferential direction. A leading device for a pipe propulsion burying device, characterized in that a baffle plate is provided at the rear end side of the discharge port 14 to prevent the transport of earth and sand.