JP2002038875A - Excavating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavating device excellent in serviceability, capable of disposing a pipe material in a natural ground by jacking the excavating device by a fixed push-moving force. SOLUTION: The excavating device having an end fitted with an excavating part 1 is propelled within the natural ground while permitting the natural ground to be excavated by the excavating part 1. The excavating device is constituted as follows: the plural pipe materials 2 different in diameter are installed in a fitted state; the excavating part 1 is installed at the end of the outermostly mounted pipe material 3 having the largest diameter; and the other pipe materials 3 and 5 are slidingly jacked relative to the innermostly mounted pipe material 4 having the smallest diameter in a sliding state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator used for a propulsion method for arranging a sewer pipe or the like.

[0002]

2. Description of the Related Art A shaft is drilled, and a drilling device provided with a drilling portion at the tip from the peripheral wall of the shaft is pushed by an appropriate means such as a propulsion jack.
Various propulsion methods have been proposed in which pipes are sequentially pushed further behind the excavator to dispose a sewer pipe or the like in the ground.

[0003] In this propulsion method, the pushing force required for pushing the excavator and the pipe material increases as the amount of excavation by the excavator increases, that is, the pushing force of the pipe material sequentially arranged behind the excavator increases. The longer the length, the greater the pushing force required. This is because the longer the length of the tube, the greater the frictional resistance between the outer peripheral surface of the tube and the ground.

Therefore, conventionally, for example, in Japanese Patent No. 2601401, filed by the applicant of the present invention, the outer peripheral surface of an excavator and the outer peripheral surface of a pipe material are filled with a sliding material, and the ground, the excavating device and A method has been proposed for reducing the frictional resistance with the pipe material and facilitating the pushing of the drilling device and the pipe material. However, even with this method, there is a difference in the degree of the pipe material arranged sequentially behind the drilling device. The longer the length, the greater the pushing force required.

The present invention solves the above problems,
An object of the present invention is to provide a highly practical excavator capable of arranging a pipe at the ground by propelling the excavator with a constant pushing force.

[0006]

The gist of the present invention will be described with reference to the accompanying drawings.

A digging section 1 is provided at the tip.
A plurality of pipes 2 having different diameters are provided in a fitted state, and the excavation apparatus is provided at the tip of the largest diameter pipe 3 provided on the outermost side. A digging apparatus according to claim 1, wherein the digging portion 1 is provided, and the other tubing materials 3 and 5 are configured to be propelled in a sliding state with respect to the smallest diameter tubing material 4 provided on the innermost side. It is.

[0008] Further, in the excavator according to claim 1,
After all the other pipes 3,5 are propelled in the sliding state with respect to the smallest diameter pipe 4, the outermost pipe 5 is further outermost with respect to the innermost pipe 5 among the propelled other pipes 3,5. The present invention relates to an excavator characterized in that the pipe member 3 is configured to be propelled in a sliding state.

Further, in the excavator according to any one of claims 1 and 2, a propulsion jack 6 is provided at a tip end of the smallest diameter pipe member 4, and a pipe member closest to the smallest diameter tube member 4. 5 is provided with an abutting member 8 with which the pressing portion 7 of the propulsion jack 6 abuts, and the propulsion jack 6 is extended to press the abutment member 8 so that the pressing member 8 is pressed against the smallest-diameter tube member 4. The present invention relates to an excavating apparatus characterized in that the contact member 8 and the pipe 5 closest to the smallest-diameter pipe 4 are propelled.

[0010] In the drilling apparatus according to claim 3,
The contact body 8 and the propulsion jack 6 are provided in a detachable manner, which are provided detachably.

[0011]

Operation and effect of the present invention In this configuration, of the plurality of pipes 2 provided in the fitted state and having different diameters, all of the other pipes 3 and 5 are propelled in a sliding state with respect to the smallest diameter pipe 4. Therefore, the frictional resistance does not act on the smallest diameter pipe 4 which is not propelled, and only the frictional resistance acting on the outer peripheral surface of the largest diameter pipe 5 provided on the outermost side becomes the frictional resistance acting on the excavator. .

Therefore, the frictional resistance, which is the propulsion resistance of the excavator, is always equal to the outer peripheral area of the pipe member 5 having the largest diameter.
Since it is constant, the pushing force required for propulsion of the excavator can be set constant.

[0013] Since the present invention is constructed as described above, the excavator has excellent practicality and can be propelled over a long distance with a constant pushing force.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate one embodiment of the present invention and will be described below.

In this embodiment, a digging portion 1 is provided at the tip,
An excavator for propelling the ground while excavating the ground by the excavation unit 1, wherein three pipe materials 2 having different diameters are provided in a fitted state, and the largest diameter pipe material 3 provided on the outermost side is provided.
The excavation part 1 is provided at the tip of the pipe, and the other pipes 3, 5 are propelled in a sliding state with respect to the smallest diameter pipe 4 provided on the innermost side. With respect to the pipe member 5 (hereinafter referred to as an intermediate pipe member 5), the largest diameter pipe member 3 (outermost pipe member) is propelled in a sliding state.

Further, a propulsion jack 6 is provided at the tip of the smallest diameter pipe member 4, and an abutment 8 is provided on the inner surface of the intermediate pipe member 5 with which the pressing portion 7 of the propulsion jack 6 abuts.
The propulsion jack 6 is extended and the contact member 8 is pressed, so that the contact member 8 and the intermediate tube 5
Is configured to be propelled.

The propulsion jack 6 and the abutment 8 are detachably provided, and after the other pipes 3, 5 are propelled in a sliding state with respect to the smallest diameter pipe 4 provided on the innermost side, The propulsion jack 6 and the contact member 8 are once removed, and the propulsion jack 6 is attached to the intermediate tube 5, and the contact member 8 is attached to the inner surface of the largest diameter tube 3.

The attachment portion 9 to which the contact body 8 is attached is
The length direction of the inner surface of the intermediate pipe 5 and the outermost pipe 5
Are arranged side by side at predetermined intervals in the length direction of the inner surface.

The propulsion jack 6 and the contact body 8
In order to make the propulsion load of the pipe 2 as uniform as possible in cross section, a plurality of pipes 2 are arranged on the inner surface of the pipe 2 at predetermined intervals in a surrounding state.

In the figure, reference numeral 10 denotes a water-stop packing 10 for preventing the spring of the ground from entering through gaps between the respective pipes 2.

Hereinafter, the propulsion method using the excavator of the present embodiment will be described in detail.

First, a shaft is bored in the ground.

Subsequently, the three pipes 2 having different diameters were provided in a fitted state from the peripheral wall of the shaft, and the excavation part 1 was provided at the tip of the largest diameter pipe 3 provided on the outermost side. Insert the drilling rig into the ground. In this state, the smallest diameter tube 4 and the middle tube 5 are set to be slidable, and the middle tube 5 and the largest tube 3 are fixed. The propulsion jack 6 is the smallest diameter pipe 4
And the contact body 8 is provided at an attachment portion 9 on the inner surface front end side of the intermediate pipe member 5.

First, only the pipe member 3 having the largest diameter is cut into the excavation section 1.
And then inserting the intermediate pipe 5 and the smallest pipe 4 inside the largest diameter pipe 3.

Subsequently, while excavating the ground by the excavation unit 1, the propulsion jack 6 provided at the distal end of the smallest diameter pipe 4 is extended, and the pressing unit 7 of the propulsion jack 6 causes the abutment body 8. , The intermediate pipe 5 and the largest diameter pipe 3 are pushed and pushed against the smallest diameter pipe 4 in a sliding state.

At this time, since the amount of extension of the propulsion jack 6 is limited, after the propulsion jack 6 is extended, the propulsion jack 6 is temporarily contracted, and then the attachment position of the contact body 8 is changed to an intermediate pipe material. 5 to the attached portion 9 on the base end side of the inner surface, and again
The step of extending the propulsion jack 6 is repeated to press and protrude the intermediate pipe 5 and the largest diameter pipe 3.

In this way, the other pipes 3.5 (the middle pipe 5 and the largest pipe 3) are used for the smallest pipe 4.
After that, the propulsion jack 6 is attached to the tip of the intermediate tube 5 and the contact body 8 is attached to the attachment 9 on the inner surface tip of the largest diameter tube 3.

Subsequently, the middle tube 5 and the largest tube 3
Is fixed so as to be slidable, and the intermediate pipe 5 and the smallest diameter pipe 4 are fixed. Similarly, while excavating the ground by the excavation unit 1, The propulsion jack 6 provided at the tip end is extended, and the propulsion jack 6 is extended.
By pressing the contact body 8 by the pressing portion 7, the largest diameter pipe 3 is pressed and propelled against the intermediate pipe 5 in a sliding state. Similarly, after the propulsion jack 6 is extended, the propulsion jack 6 is once contracted, and then the attachment position of the contact body 8 is moved to the attachment portion 9 on the inner surface base end side of the largest diameter pipe member 3. Then, the process of extending the propulsion jack 6 is repeated again to press and protrude the largest diameter pipe member 3.

Since the present embodiment is configured as described above, only the outer peripheral surface of the pipe member 5 having the largest diameter is propelled while rubbing against the ground, so that the propulsion can be performed with a constant frictional resistance. It becomes a drilling equipment excellent in practicality.

That is, even when the tube 2 is disposed over a long distance, the frictional resistance does not increase, so that the pushing of the tube 2 is facilitated.

In a configuration in which a plurality of pipes having different diameters are provided in a fitted state, the inner small-diameter pipe is slid sequentially with the outer large-diameter pipe to excavate the ground. , Because the diameter of the tubing to be propelled gradually decreases,
The pushing by the propulsion jack must correspond to the change in frictional resistance, or the outer diameter of the excavated portion must be changed to a smaller diameter. In this embodiment, the diameter of the pipe 2 to be propelled is the outermost. Since the diameter of the tube member 5 is constant and does not change, the pushing force required for pushing and pushing the tube member 2 may be constant, the control of the propulsion becomes easy, and the same excavating portion 1 may be used. it can.

Further, the pressing portion 7 of the propulsion jack 6 provided at the tip of the inner tube material presses the contact body 8 provided on the inner surface of the other tube material to propell the other tube material. While the propulsion jack 6 is fixed to the tip of the inner tube, another tube can be propelled. Also,
Since a large number of attachment portions 9 to which the abutment body 8 is attached are arranged at predetermined intervals in the longitudinal direction of the other pipe material, the attachment portions 9 on the base end side are gradually contacted in accordance with the propulsion of the other pipe material. By moving the contact body 8, the pressing part 7 of the propulsion jack 6 can favorably press the contact body 8.

The propulsion jack 6 is connected to the smallest diameter pipe member 4.
The end of the propulsion is made a reaction force by removing from the end of the tube and attaching it to the end of the intermediate tube 5 or attaching it to the largest diameter tube 3 from the end of the intermediate tube 5. Using the tip of the tubular material 2, one propulsion jack 6
By using (actually, a plurality of propulsion jacks 6 arranged on the inner surface of the tube material 2 in a surrounding state), all the tube materials 2 can be propelled.

The contact member 8 is also detached from the attachment portion 9 of the intermediate pipe member 5 and attached to the attachment portion 9 of the largest-diameter tube member 3 so that one contact member 8 (actually, the All the pipes 2 can be propelled by using a plurality of abutting bodies 8) arranged in a surrounding state on the inner surface of the pipe.

Although three tubes 2 are shown as being overlapped in the drawing, the same applies if two or more tubes are fitted.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Excavation part 2 / 3.4.5 Pipe material 6 Propulsion jack 7 Pressing part 8 Contact body

Claims (4)

[Claims] An excavating device provided with a digging portion at a tip thereof and propelling inside the ground while digging the ground with the digging portion, wherein a plurality of pipes having different diameters are provided in a fitted state. The excavation part is provided at the tip of the largest diameter pipe material provided on the outside, and the other pipe material is configured to be propelled in a sliding state with respect to the smallest diameter pipe material provided on the innermost side. A drilling rig characterized by the following: 2. The excavator according to claim 1, wherein all of the other pipes are slid in the slide state with respect to the smallest diameter pipe, and then the innermost pipe of the other urged pipes is propelled. An excavator characterized in that it is configured to further propel an outer pipe member in a sliding state with respect to the excavating member. 3. The excavator according to claim 1, wherein a propulsion jack is provided at a distal end of the smallest diameter pipe, and a propulsion jack is provided on an inner surface of the pipe nearest to the smallest diameter pipe. Is provided with an abutting body against which the pressing portion of the propulsion jack abuts, and the protruding jack is extended to press the abutting body, whereby the corresponding body and the smallest diameter pipe material are applied to the smallest diameter pipe material. An excavator characterized by being configured to propel a pipe immediately adjacent to the excavator. 4. The excavator according to claim 3, wherein the contact body and the propulsion jack are provided detachably.