JP2000160975A - Pipe jacking body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent battery exhaustion and dispense with an external cable by making the tip section of a pipe jacking body rotatable and thrustable, and providing a power generator for pipe jacking action auxiliary apparatuses fitted with an eccentric heavy bob body to a shaft in the rotation section of the pipe jacking body. SOLUTION: The tip section 3 of a pipe jacking body 1 is rotated for excavating the ground. A slope 4 relative to the axis is formed on the tip section 3, and the tip section 3 is rotatively driven and thrust to linearly advance the pipe jacking body 1. Propulsion action auxiliary apparatuses 5 are mounted on the tip section 3 for the pipe jacking body 1 to reach an arrival point accurately, and the propulsion action auxiliary apparatuses 5 such as a position detecting transmitter 6 and a power unit 7 are mounted to recognize the position of the tip section 3 and to avoid an obstacle. A power generator 8 is fitted with an eccentric heavy bob body 10 to the rotary shaft 9 of an armature, and the power generator 8 generates electric power to charge a battery 11 when the pipe jacking body 1 is rotated. Since the power unit 7 is provided in the pipe jacking body 1, no cable is required to be installed, and the excavation work is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propelling body used in a non-cutting method, and more particularly, to a starting side in which a tip portion is freely rotatable around its axis and is capable of being pushed in. The present invention relates to a propulsion body that is inserted into the ground between the ground and an arrival side, and is used for burying a buried pipe in the insertion trace.

[0002]

2. Description of the Related Art Conventionally, a propulsion body has a distal end portion which is rotatable around its axis and is capable of being pushed in. A propulsion operation assisting device is provided inside the distal end portion. A device having a transmitter capable of detecting the position of the tip is used. The power of the transmitter is
A battery as an internal power supply built in the propulsion body or an external power supply for supplying power via a cable disposed inside the propulsion body has been used.

[0003]

In the case of the propulsion unit using the internal power supply, there is a problem that the battery runs out during the construction process in the case of a long-term construction. On the other hand, the external power system that passes the cable through the propulsion body
Although practical, in this case, a cable must be passed through the propulsion pipe, and there is a problem that the efficiency of the construction is greatly reduced.

Accordingly, an object of the present invention is to solve the above problems and to provide a propulsion body having an internal power supply capable of supplying power for a long period of time.

[0005]

According to a first aspect of the present invention, there is provided a propulsion body according to the first aspect, wherein a tip portion is rotatable around its axis, and is pushed in. In a propulsion body provided with an electric propulsion operation assisting device, a generator for operating the propulsion operation assisting device is provided inside a rotating unit, and an eccentric weight body is provided on a rotating shaft of the generator. The point is that it is attached.

A second characteristic configuration of the propulsion body according to the second aspect of the present invention is that the propulsion body according to the first characteristic configuration is integrally formed so as to be freely rotatable.

According to a third aspect of the present invention, there is provided a propulsion body according to the third aspect of the present invention, wherein the propulsion operation assisting device according to the first aspect or the second aspect comprises a transmitter capable of detecting the position of the tip. The point is to prepare.

According to the first feature of the propulsion body according to the present invention, the propulsion operation assisting device can function without using an external power supply and without fear of running out of batteries. Will be able to That is, since the generator provided with the eccentric weight body attached to the shaft is provided inside the rotating part of the propulsion body, the eccentric weight body is rotated if the rotating part is rotated around its axis. Since the motor rotates relatively around the axis of the generator and rotates the armature of the generator, the rotation of the propulsion body itself enables the generator to generate power. Therefore, when the rotating part of the propulsion body rotates, power can be supplied to the propulsion operation assisting device. If a storage battery is provided, as is generally used when the mobile body is provided with power generation means, by charging it, it will function as a power source for a long time.

According to the second aspect of the propulsion body according to the present invention, since the entire propulsion body is rotatable, no matter where the generator is disposed on the propulsion body, the first aspect of the first aspect will be described. The operation and effect can be achieved.

According to the third aspect of the propulsion body according to the present invention, the position of the distal end portion is reduced due to running out of the battery during the construction while the effects of the first aspect or the second aspect are exhibited. Can be prevented from becoming unknown. For example, when it is desired to confirm the position, the position of the tip can be detected by rotating the rotating unit.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a propulsion body according to the present invention will be described. FIG. 1 is a vertical sectional view of the ground showing a pushing start state of an example of the propulsion body according to the present invention from a start point, and FIG. 2 is a side view showing a main part of a distal end portion of the propulsion body shown in FIG. FIG. 3 is a vertical sectional view of a generator mounting portion in the rotating portion.

(Summary) In order to bury various pipes between the start point and the arrival point, a propelling body is pushed from the start point to the arrival point, and then a resin pipe or the like to be buried at the arrival point is propelled. The propulsion body is connected to the body and the propulsion body is returned to the starting point again to bury the pipe.

The propulsion body according to the present invention is constructed by sequentially connecting a plurality of propulsion shaft members. That is, when pushing the propulsion body at the starting point, the pushing operation is performed while sequentially connecting new propulsion shaft members to the ends of the propulsion body that has been pushed.

The pushing operation is performed while rotating the tip of the propulsion body in order to excavate the ground. The pushing operation is performed while constantly or intermittently spraying water or muddy water from the tip. By injecting water, etc., the ground in front of the propulsion body can be softened, especially when muddy water mixed with bentonite etc. is injected, the effect of reducing the frictional resistance between the ground and the propulsion body is exhibited Is done. By performing these rotation operations and the injection operation of water etc. together, it is possible to push the propulsion body while excavating,
The pushing operation can be performed smoothly.

At the time of the pushing operation, it is sufficient that at least the distal end rotates, and it is not always necessary to rotate the entire propulsion body. Further, in the present embodiment, the tip portion refers to, for example, the propulsion shaft member 2 at the foremost portion of the propulsion body 1 as shown in FIG. However, the present invention is not limited to this configuration, and only a part of the propulsion shaft member at the foremost portion may be rotationally driven. The propulsion body 1 described below has not only the tip 3 but also
The whole propulsion body 1 is configured to be excavated by being rotationally driven from the root.

The shape of the tip is as shown in FIG.
An inclined surface 4 having a predetermined angle with respect to the axis of the tip 3 is formed at the foremost end. That is, when the tip portion 3 is pushed while being rotationally driven, the tip portion 3 excavates the ground in all radial directions with respect to the axis, so that the propulsion body 1 goes straight. On the other hand, when the propulsion body 1 is pushed in with the rotation of the tip 3 stopped, the propulsion direction is changed by the inclined surface 4. In other words, when the propulsion body 1 is pushed in, the drive rotation of the propulsion body 1 is stopped appropriately so that the propulsion body 1 faces the arrival point while confirming the position of the distal end portion 3 by the position detecting means. Perform the pushing operation while correcting the direction.

(Propulsion Operation Auxiliary Equipment) As described above, in order to make the propelling body pushed from the starting point accurately and promptly reach the destination, the position of the tip portion is recognized in the pushing process, It is necessary to avoid obstacles, and for that purpose, for example, it is necessary to mount various devices as the propulsion operation assisting device 5 on the distal end portion 3. In the present embodiment, as an example, the tip portion 3 at the time of pushing is described.
An example is shown in which a position detecting transmitter 6 for constantly grasping the position by the position detecting means is provided inside the distal end portion 3.

The position detecting transmitter 6 can be formed, for example, of a type that forms a magnetic field at the tip 3.
The magnetic field lines forming the magnetic field are detected on the ground to recognize the position of the tip 3. The detection of the lines of magnetic force is performed, for example, by measuring the direction of the lines of magnetic force or the magnetic flux density of the lines of magnetic force.

Specifically, the distal end portion 3 is mainly provided with a position detecting transmitter 6 and a power supply unit 7.
The position detecting transmitter 6 is installed in a predetermined direction with respect to the axial direction of the distal end portion 3 in order to facilitate the direction of the line of magnetic force. The power supply unit 7 is for supplying power to the position detection transmitter 6. In the present embodiment, in order to solve the conventional problem, it is provided inside the distal end portion 3. The power supply unit 7 is housed in a waterproof capsule 12 together with the position detection transmitter 6, for example, as shown in FIG.
The pair of three supporting legs 13 secures a flow path of water or muddy water between the pair of three supporting legs 13 and the inner wall of the propulsion shaft member 2 at the most distal end, thereby forming the distal end 3. Attach to the shaft member 2.

(Specific Example of Generator) In the generator 8, an eccentric weight body 10 is attached to a rotating shaft 9 of an armature, and no other drive source is connected. The power generation by the generator 8 will be described. As shown in FIGS.
Even when the distal end portion 3 is driven to rotate around its axis, it is located vertically below the rotary shaft 9 of the eccentric weight body 10. Therefore, the armature rotates relative to the field of the generator 8 at the rotation speed of the tip 3. Therefore, when the propulsion body 1 is rotated, the generator 8 generates power. If a speed increasing mechanism is provided between the eccentric weight body 10 and the rotating shaft 9 of the armature, the generator 8
Can be increased. The power supply unit 7 also includes a storage battery 11, which is charged so that the propulsion operation assisting device 5 represented by the position detection transmitter 6 can be charged even when the propulsion body 1 is not rotated. Power can be supplied. Therefore, the propulsion operation assisting device 5 can be used for a long time without running out of battery.
Can be activated. Incidentally, since the power supply unit 7 is provided inside the propulsion body 1, it is not necessary to extend a cable to the propulsion operation assisting device 5 as in the related art, so that the excavation work is simplified.

[Other Embodiments] <1> The propulsion operation assisting device 5 is not limited to the position detecting transmitter 6, but may be a radar or a CCD camera for monitoring the front of excavation work. It may be a drill bit provided at the front end of 3 or an electromagnetic valve that changes the direction in which water or muddy water is injected. These may be mounted at the same time, or some may be mounted. Further, the position detecting transmitter 6 may not be provided.

<2> As described above, the propulsion body 1 may be rotated in its entirety. Alternatively, only the tip 3 or only the front end thereof may be rotated. In the propulsion body that is partially rotated in this way, it is sufficient that the power supply unit 7 or the generator 8 therein is provided in the rotating part. In short, what is necessary is just to be configured so that the rotation around the generator 8 is rotated around the rotating shaft 9 of the armature. As described above, since power is generated by using the rotation of the propulsion body for excavation, an external power is not used as a power supply for the propulsion body operation device, and only gravity is used. It is an energy-saving means. <3> In the above-described embodiment, the example in which the power supply unit 7 is incorporated in the distal end portion 3 has been described. However, it is not necessary to store the generator 8 and the storage battery 11 in the same location as the power supply unit 7. Only the machine 8 may be arranged on the rotating part. Note that the generator 8 has its rotating shaft 9
The propulsion shaft member 2 is arranged in the axial direction.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a ground showing a state of excavation of a propulsion body according to the present invention.

FIG. 2 is a partially transparent side view showing a main part of an example of a propulsion body according to the present invention.

FIG. 3 is a longitudinal sectional view of a main part of a propulsion body for explaining the principle of power generation of a generator.

[Explanation of symbols]

 3 Tip 5 Propulsion Operation Aid 6 Position Transmitter 8 Generator 9 Rotary Axis 10 Eccentric Weight

Claims (3)

[Claims] 1. A propulsion body having an electric propulsion operation assisting device whose tip is rotatable about its axis and freely pressable, and operates the propulsion operation assisting device. Body provided with a generator for rotation inside the rotating part, and an eccentric weight body is attached to a rotating shaft of the generator. 2. The propulsion body according to claim 1, wherein the whole is integrally formed so as to be freely rotatable. 3. The propulsion body according to claim 1, further comprising a transmitter capable of detecting a position of the distal end as the propulsion operation assisting device.