JP2524726B2 - Small diameter pipe propulsion machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is capable of automatically controlling the excavation direction on the tip blade mouth side of a leading conduit that can excavate in the soil prior to burying a small diameter pipe. The present invention relates to a propulsion direction control device for a small-diameter pipe propulsion machine.

(Prior Art) Conventionally, as shown in FIG. 7, a leading conduit c having a cutter b communicating with an internal screw conveyor a on the tip side thereof.
In a small-diameter pipe propulsion machine capable of embedding a small-diameter pipe by following it, a pair of correction cylinders e and e are provided between the rear part of the cutter drum part d supporting the cutter b and the front part of the front conduit c. It was structured to simply intervene.

(Problems to be solved by the invention) Since the conventional structure has the above-described structure, the cutter drum portion d is tilted to correct the direction by the combination of the expansion and contraction of the pair of correction cylinders e and e. As a matter of fact, the correction was on / off, and there was a problem that fine control corresponding to the excavation error could not be performed.

In addition, it is considered that the propulsion direction can be corrected accurately and the operability is improved, so that Japanese Patent Application No. 55-171729 (Japanese Utility Model Application No. 57-9628).
No. 8) micro film and the one disclosed in JP-A-54-91911 are also known, but in all of these, the face plate of the cutter head and the screw conveyor are connected, and the load applied to the cutter head during excavation. Since it is supported by the screw conveyor, there is a problem that both the rotation torque and the reaction force must be received by the screw conveyor.

(Means for Solving Problems) A first invention is a small-diameter pipe propulsion machine in which a small-diameter pipe can be embedded by following a leading pipe having a cutter head driven by a screw conveyor on the tip side. The cutter head is supported by the cutter drum portion and is connected to the screw conveyor via the cutter drum portion, and the cutter drum portion is fitted into the leading conduit via a bearing.

Therefore, in excavation, the load applied to the cutter head is applied to the leading conduit (main body) via the bearing, and the load is not supported by the screw conveyor, and the screw conveyor only needs to support the rotational torque.

In this way, since the cutting reaction force of the cutter is received by the cutter drum portion, there is excavation force, and the crustal can be sufficiently crushed.

(2) In the second invention, a screw conveyor is provided inside the front conduit to provide a casing, and a spherical support having a spherical outer peripheral surface is fixed to the front end of the casing, and the base of the cutter drum portion is fixed. A spherical body that can be fitted to the spherical support is connected to the portion, and a plurality of correction cylinders are provided between the end of the spherical seat and the outer tube of the leading conduit and the casing. Is.

Therefore, when the leading conduit is swung, the cutter head is also swung at the same time, and the direction of the cutter drum portion and the cutter are integrally corrected by the correction jack in this way, so that the operation is simple and the direction is surely corrected.

(3) A third aspect of the invention is the small-diameter pipe propulsion machine, wherein the screw conveyor is provided with a joint portion.

Therefore, when the cutter head bends, the joint portion of the screw conveyor also bends at the same time, so that no unreasonable force is applied to the screw conveyor.

(Embodiment) Next, the present invention will be described with reference to an embodiment shown in the drawings.

FIG. 2 shows a construction state, in which a small-diameter pipe propulsion machine equipped with a jack 11, a driving device, a remote control panel 13 and the like is installed inside the starting stand 10 and can be propelled by the jack 11. In the casing 5 inside the conduit 3, the screw conveyor 1 is axially mounted, and a cutter drum portion 3a having a cutter 2 on the front end surface and rotatable by the screw conveyor 1 is provided on the front end side of the front conduit 3. In a state in which the sand is excavated by the cutter 2 at the tip while being pushed continuously into the soil by the jack 11 and is conveyed backward in the casing 5 by the screw conveyor 1,
When the front conduit 3 moves forward into the soil, the jack 11 is retracted, and the small diameter pipe 4 of the fume pipe that is loaded from above is followed by the front conduit 3 and propelled again by the jack 11.
Conventionally, the small-diameter pipes 4 are connected one after another to advance the excavation, and when the tip pipe 3 at the tip reaches the reaching shaft 10a, the pipes 3 can be removed and buried in the soil by connecting the pipes 4 with each other. The structure is the same as the shape structure.

As shown in FIG. 1, a spherical support 6 having a spherical outer peripheral surface is provided at the front end portion of the casing 5 on the tip side of the leading conduit 3.
In front of the spherical seat 7 fitted to the outer periphery of the spherical support 6 by fixing the screw conveyor 1 at the joint portion 1a located in the center of the spherical support 6 so that the screw conveyor 1 can be bent. The rear portion of the cutter drum portion 3a is fitted to the outer periphery of the spherical roller bearing 14 by means of a tapered roller bearing 14, and the spherical seat 7
Displacement gauges that operate in correspondence with each other at the upper and lower positions of the rear end face
9a and the tip of the correction cylinder 8a, and the left and right positions of the displacement gauge 9b and the front end of the correction cylinder 8b, which operate in correspondence with each other, are connected (see also FIG. 3), and the displacement gauges 9a, 9b and The rear portion of each of the correction cylinders 8a and 8b is connected to the outer periphery of the casing 5 via connecting members 15 and 16, and an electromagnetic valve 17 and a measurement target 18 are installed inside the rear portion of the front conduit 3.

FIG. 4 shows another embodiment of the correction cylinders 8a, 8b, 8c, 8
The four d's are arranged at positions equidistantly arranged on the outer circumference 4, and displacement gauges 9a, 9b are arranged on the upper side and the left side.

Further, FIG. 6 shows another embodiment, which is constructed by connecting the rear portions of the displacement gauges 9a, 9b and the correction cylinders 8a, 8b to the inner peripheral surface side of the leading conduit tube 3 via coupling tools 15a, 16a, respectively. It was done.

Therefore, at the time of excavation work, the propulsion direction of the front conduit 3 is measured by the target 18, and the correction direction and the correction amount are set while the deviation direction and the deviation amount are detected, and the correction cylinders 8a and 8b are actuated to form the spherical surface. The cutter drum 3a can be swung in a desired direction while sliding the spherical seat 7 with respect to the support 6, and the remote operation is performed while detecting the correction amount by the swing by the displacement gauges 9a and 9b. Board 1
It will be possible to set by looking at the indicator meter of 3.

FIG. 5 shows a state of swinging downward by the maximum θ angle. In this state, the inner diameter part near the rear end surface of the spherical seat 7 is (a) on the outer peripheral surface of the spherical support 6 on the rear end side. As shown in the drawing, the swing angle θ is defined on the circumference, and the swing angle θ can be obtained irrespective of the dimensional variation of the correction cylinder itself and the variation of the mounting dimension.

In the case of the embodiment shown in FIG. 4, the correction cylinders 8c and 8d and 8a and 8b are pushed and pulled in a pair in the vertical direction, and 8b and 8c and 8a and 8d are pushed and pulled in the left and right direction. Or combine them in other directions such as left and right, lower left, etc.
Can be rocked.

If a digging problem occurs during work and the buried small-diameter pipe 4 is pulled back to the starting stand 10 side, use a jack.
When the casing 5 is pulled by 11, the force is transmitted from the spherical support body 6 and the spherical seat body 7 to the front conduit 3 and the small diameter pipe 4, so that it can be pulled back and recovered.

(Effects of the Invention) The present invention is configured as described above in detail, and since the cutter head is connected to the screw conveyor via the cutter drum portion, the excavation reaction force of the cutter is received by the cutter drum portion. It is powerful and can sever enough crucifixes.

Further, since the direction of the cutter drum portion and the cutter are integrally corrected by the correction jack, the operation is easy and the direction can be surely corrected.

Further, since the screw conveyor is provided with the joint portion, even if the cutter is bent, the screw conveyor is not subjected to excessive force. .

Therefore, according to the present invention, the cutter drum portion can be reliably and favorably swung by an arbitrary angle within the maximum swing angle, and an error is detected, and at the same time, an appropriate correction direction or correction value is set to correct the excavation direction. The excavation work can be carried out with high accuracy while the operability of the direction correction can be improved, the work efficiency can be improved, and the work can be suitably performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part of an embodiment of the present invention, FIG. 2 is an explanatory view showing a construction state, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1, and FIG. FIG. 5 shows an embodiment, FIG. 5 is an operation explanatory view of FIG. 1, FIG. 6 shows another embodiment, and FIG.
The figure shows a conventional example. 1 ... Screw conveyor, 2 ... Cutter, 3 ... Conduit, 4 ... Small diameter tube, 5 ... Casing, 6 ... Spherical support, 7 ... Spherical seat, 8a
~ 8d… correction cylinder, 9a, 9b… displacement meter.

Claims (3)

(57) [Claims] 1. A small-diameter pipe propulsion machine in which a small-diameter pipe can be embedded by following a leading pipe having a cutter head driven by a screw conveyor on the tip side, and the cutter head is supported by a cutter drum portion. A small-diameter pipe propulsion machine characterized in that the small-diameter pipe propulsion machine is connected to a screw conveyor via the cutter drum part, and the cutter drum part is fitted into the leading conduit via a bearing. 2. A casing containing a screw conveyor is provided inside the advance destination conduit, and a spherical support having a spherical outer peripheral surface is fixedly provided at the front end of the casing, and a base portion of the cutter drum portion is provided. A spherical body that can be fitted to the spherical support body is connected, and a plurality of correction cylinders are interposed between the end portion of the spherical seat body and the outer tube of the front conduit and the casing. A small-diameter pipe propulsion machine according to claim 1. 3. A small-diameter pipe propulsion machine according to claim 2, wherein the screw conveyor is provided with a joint portion.