JPH11303556A - Excavator and excavation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excavator and an excavation method capable of safely, securely, and speedily removing an obstacle such as a rock appearing on a working face, restarting the excavation work after removing the obstacle quickly, performing the maintenance and inspection of an excavator, a leading pipe, and an embedding member easily and precisely, and improving the workability. SOLUTION: A leading pipe 11 and an inner shell 12 are arranged on inner and outer sides in a double structure, and an embedding member 10 is connectable with a rear end part of the leading pipe 11. A cutter head 35 and a screw auger 34 are rotatably supported on an inner side of the inner shell 12, and the leading pipe 11 is thrusted to a working face side to excavate the natural ground. The cutter head 35 and the screw auger 36 are integrally mounted on the inner shell 12. The inner shell 12 is mounted on the leading pipe 11 or the leading pipe 11 and the embedding member 10 so as to pull in and out so that the inner shell 12 can be quickly pulled in and out of the leading pipe 11 or the leading pipe 11 and the embedding member 10. For example, if an obstacle 38 such as a rock appears on the working face side, the inner shell 12 is pulled out of the leading pipe 11 or the leading pipe 11 and the embedding member 10, a wide and empty space is formed in the inside thereof, and the obstacle 38 is removed safely, securely, and speedily to improve the workability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention removes obstacles such as rocks appearing on a face safely and reliably and quickly, and after the removal, can quickly resume excavation work. TECHNICAL FIELD The present invention relates to a digging apparatus and a digging method capable of easily and accurately performing maintenance and inspection of a digging apparatus and improving its workability.

[0002]

2. Description of the Related Art Conventionally, when underground structures such as waterways and underpasses are constructed underground, for example, Japanese Patent Publication No. 55-5055
In Japanese Patent Publication No. 7, an excavation pipe is attached to the tip of an underground buried object,
A screw auger is arranged inside the underground buried object and the excavation pipe, and a cutter is rotatably provided at the tip of the auger,
The excavated pipe penetrates the ground from the starting shaft, excavates the underground while excavating the front of the pipe, and discharges the excavated earth and sand by the auger.

[0003] However, in the conventional drilling device, when an obstacle such as a rock appears on the ground, the propulsion of the underground buried object is interrupted and the construction is forced to be interrupted, and there is no appropriate countermeasure. However, a method of excavating rocks from the upper part of the ground is usually employed, and there is a problem that the construction period is prolonged and the construction cost is increased.

[0004] For this reason, the applicant provided the drive shaft of the screw auger so as to be movable in the axial direction, and provided the cutter so as to be able to protrude forward of the leading conduit. Developed a leading hole excavation device that protrudes the drive shaft forward to take rock into the leading conduit and crushes it, eliminating the need for rock excavation work and shortening the construction period. An application has already been filed as Hei 8-73509.

However, in the apparatus already filed, the size of the rock or the like to be taken into the leading conduit is limited, and when large rock or the like appears, the above method cannot be adopted. It is necessary to throw a worker into the excavation hole to excavate rocks and remove them. In this case, it is extremely difficult and time-consuming to pull out the device, and it is difficult to secure safety in the mine.In addition, it is complicated and troublesome to bring the above-mentioned device into the mine after removing rocks and the like. There was a problem that the construction period and the construction cost increased significantly.

Further, when repairing a fault during excavation, the above-mentioned device requires a worker to enter a densely located front pipe and performs work, so that workability and work efficiency are poor, work is troublesome, and work safety is increased. Its sexuality is also difficult to anticipate, and its improvement has been desired in advance. In particular, when this excavator is used for under-track crossing work, since the work is restricted by the line closing time, quickness, smoothness, and safety of the work are more important.

[0007]

SUMMARY OF THE INVENTION The present invention solves such a problem, and safely and reliably removes obstacles such as rocks appearing on a face, and can quickly resume excavation work after removal. In addition, an object of the present invention is to provide a drilling device and a drilling method thereof capable of easily and precisely performing maintenance and inspection of a drilling device, a leading pipe, and a buried member, and improving its workability.

[0008]

According to the present invention, a front pipe and an inner shell are double-laid inside and outside, and a buried member can be connected to a rear portion of the front pipe, and an inner shell is provided inside the inner shell. Rotatably supports the cutter head and the screw auger,
In a drilling apparatus in which a front conduit is propelled toward a face to enable excavation of a ground, a cutter head and a screw auger are integrally mounted on the inner shell, and the inner shell is connected to a front conduit or a front conduit and a buried member. The inner shell can be quickly inserted and removed from the front conduit or the front conduit and the buried member so that the inner shell can be connected to the front conduit or the front conduit when an obstacle such as rock appears on the face side. Withdrawing from the buried members, forming a large empty space inside them, removing the obstacle safely and reliably and quickly, improving its workability, and after removing the obstacle, the inner shell is connected to the front pipe or The excavation work can be promptly resumed by being quickly drawn into the leading conduit and the buried member, so that the smoothness, safety and speed of the construction can be ensured. In addition, the cutter head and the screw auger are drawn out together with the inner shell, so that the maintenance and inspection thereof and the maintenance and inspection of the leading pipe and the buried member can be easily performed.

According to a second aspect of the present invention, a peripheral surface of the inner shell is mounted so as to be engageable with a front conduit or a front conduit and an inner surface of a buried member.
While preventing the inner shell from swaying during excavation and promoting stable excavation work, the inner shell can be smoothly and stably taken in and out when an obstacle appears or after the obstacle is removed. According to a third aspect of the present invention, the distal end of the inner shell is detachably provided on the distal end of the front conduit, the distal end of the inner shell can be pulled toward the arrival side, and the distal end of the inner shell is connected to the front conduit during excavation. , And the leading pipe or the leading pipe and the buried member are moved together with the inner shell to enable excavation.

According to a fourth aspect of the present invention, a pulling wire which can be pulled in different directions is attached to a front end portion and a rear end portion of the inner shell, and the inner shell can be moved in different directions during excavation and withdrawal. And withdrawing the inner shell by the wire,
The introduction is made easy and quick. According to a fifth aspect of the present invention, a bolt box through which a bolt can be inserted protrudes inward at a connection portion between the leading conduit and the buried member, and the leading conduit, the buried member, and the buried member can be connected to each other via the bolt box. And make those connections feasible.

According to a sixth aspect of the present invention, an engagement groove capable of receiving the bolt box is provided in an axial direction on a peripheral surface of the inner shell so that the inner shell can be taken in and out of a front conduit or a front conduit and an embedded member. To quickly remove and insert the inner shell. The invention according to claim 7 is characterized in that a discharge pipe communicating with a vacuum pump is mounted on the inner shell, and a discharge mechanism for excavated earth and sand can be drawn out from the leading pipe and the buried member, so that the inner pipe is wider inside the leading pipe and the buried member. An empty space is formed to improve the workability and safety of removing obstacles, and to facilitate maintenance and inspection of the discharge pipe.

The invention according to claim 8 is characterized in that the front conduit and the inner shell are arranged inside and outside doubly, and a buried member is connected to a rear portion of the front conduit,
A cutter head and a screw auger are rotatably supported inside the inner shell, and the excavating method of the excavator for excavating the ground by propelling the front conduit to the face side, wherein the inner shell includes the cutter head and the screw auger. The inner shell is integrally attached, and the inner shell is detachably mounted on the leading conduit or the leading conduit and the embedded member. When an obstacle appears on the face side, the inner shell is separated from the leading conduit or the leading conduit and the embedded member. Obstacles can be removed through the drawer, the leading conduit or the leading conduit and the buried member, and a large empty space is formed inside the leading conduit or the leading conduit and the buried member, and the obstacle is safely, reliably and promptly removed. In addition, the workability is improved.

According to a ninth aspect of the present invention, a pulling wire that can be pulled in different directions from each other is mounted on a front end portion and a rear end portion of the inner shell, and one of the pulling wires is pulled toward the face during excavation. When pulling out the shell, the other pulling wire is pulled in a direction opposite to the face side, so that the inner shell can be easily and quickly taken in and out via the pulling wire. According to a tenth aspect of the present invention, after removing the obstacle, the one pulling wire is pulled toward the face, and the inner shell can be drawn into the inside of the leading conduit or the leading conduit and the embedded member, thereby removing the obstacle. After that, the inner shell is quickly pulled into the front pipe or the front pipe and the buried member,
Excavation work can be resumed promptly to ensure the smoothness and speed of construction.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in which the present invention is applied to under-track crossing work will be described below with reference to FIGS.
At 0, reference numeral 1 denotes a ground constituting a roadbed, on which a roadbed 2 made of crushed stone, gravel or the like is formed, and a plurality of rails 3 are laid on the roadbed 2.

Sheet piles 4 and 5 for earth retaining are provided on both sides of the ground 1, and a support frame 7 is installed on the reaching side 6 of the excavator, and a plurality of towing jacks 8 are installed on the frame 7. I have.
One end of a traction wire 9 such as a PC steel wire is connected to the traction jack 8, and the other end is connected to an inner shell, which will be described later, constituting the excavator. In this case, the pulling wire 9 used is sufficiently longer than the crossing length under the track.

The drilling rig has an outer shell 11 which is a leading conduit, and an inner shell 12 arranged inside the shell 11, of which the outer shell 11 is formed of a rectangular steel pipe as shown in FIGS. The blade side is obliquely cut downward, and a plurality of fixed blades 13 are protrudingly provided at the upper and lower opening edges.

At the four corners on the cutting edge side of the outer shell 11, contact pieces 1 are provided.
4 are protruded inwardly, and a wire insertion groove or an insertion hole, which is an insertion portion of the pulling wire 9, in the embodiment, a wire insertion groove 15 is formed in the embodiment. A plurality of bolt boxes 16 as shown in FIG. 4 are provided on the peripheral surface of the rear end of the outer shell 11 on the side opposite to the blade side, and the box 16 is formed in a box shape with a bottom. 11 and protrude inside.

As shown in FIG. 7, a bolt insertion hole 17 communicating with the inside of the bolt box 16 is provided on the outer surface of the bolt box 16, a bolt 18 is inserted into the insertion hole 17, and the screw shaft is connected to the element of the underground construction member. A buried member 10 is inserted into a bolt box 16 and a nut 19 is screwed into the end.

As shown in FIG. 4, the buried member 10 is made of a steel pipe having the same cross-section as that of the front pipe 11, and the length thereof can be selected as appropriate. 16 are provided. Inner shell 12
Is formed of a substantially rectangular steel pipe that can be inserted into the outer shell 11, and an engagement groove 20 is formed in the circumferential surface thereof along the axial direction.
The bolt box 16 is receivable.

The tip of the inner shell 12 is beveled downward, and a contact surface 21 is provided at each of the four corners so as to be able to engage with the inner surface of the outer shell 11. A contactable rubber packing 22 is attached. In the figure, reference numeral 23 denotes a through hole formed in the rubber packing 22 so that the pulling wire 9 can be inserted therethrough.

A plurality of wire fixing boxes 24 are provided on the side of the distal end of the inner shell 12. The boxes 24 are formed in a box shape with a bottom and are arranged to protrude inside the inner shell 12. The inner surface of the wire fixing box 24 has the through hole 2
3 is provided with a wire insertion hole (not shown), and a pulling wire 9 is inserted into the insertion hole, and an end (not shown) formed by folding or bundling an end of the wire 9 into the fixing box. 24.

In the figure, reference numeral 25 denotes a plurality of wire fixing boxes provided on the lower side surface of the rear end of the inner shell 12, formed in a box shape with a bottom, and arranged to protrude inside the inner shell 12. A wire insertion hole 26 communicating with the inside is provided on the outer surface of the wire fixing box 25, and the pulling wire 2 is inserted into the insertion hole 26.
One end of 7 is inserted, and a knob (not shown) formed by folding or bundling the end is accommodated in the fixed box 24.

The pulling wire 27 used is sufficiently longer than the crossing length under the track, and the other end is connected to a winch or jack (not shown) installed on the starting side 28,
The wire 27 can be pulled out.

On the other hand, a power chamber 29 and a stirring chamber 30 are formed inside the inner shell 12, and an excavating motor 31 composed of a hydraulic motor and a reduction gear 32 are provided in the power chamber 29. A drive shaft 33 linked to the excavation motor 31 is rotatably supported. The shaft 33 is provided with a helical fin-shaped screw auger 34 and a cutter head 35.

A sediment discharge port 36 is provided at the lower part of the back of the stirring chamber 30.
One end of a discharge pipe 37 is connected to the discharge port 36, and the other end thereof communicates with a vacuum pump (not shown) provided on the starting side 28. In the drawing, reference numeral 38 denotes an obstacle such as a rock or a concrete block that has appeared on the face.

In the thus constructed apparatus of the present invention, the inner shell 12 is incorporated in the single outer shell 11 which is always the leading pipe,
The rubber packing 22 of the inner shell 12 is in contact with the rear part of the contact piece 14 of the outer shell 11, and the four corners of the inner shell 12 are engaged with the inner surfaces of the four corners of the outer shell 11. Also, wire fixing box 2
Nozzles (not shown) formed by folding or binding the ends of the pulling wires 9 and 27 are accommodated in the wires 4 and 25.

Of these, the pulling wire 9 is led out of the rope insertion hole (not shown) into the through hole 23 of the rubber packing 22, and this is inserted into the wire insertion groove 15 of the outer shell 11 and pulled out of the outer shell 11. Further, the wire 27 is inserted into the rope insertion hole 26, and the wire 27 is drawn out of the inner shell 12.

Since the inner and outer shells 11, 12 are separably assembled, the excavating motor 31, the speed reducer 32, the cutter head 35, the screw auger 34, the drive shaft 33, The discharge pipe 37 etc. can be taken out from the outer shell 11 integrally.

Therefore, for example, when the excavator is not in use, it is carried into a maintenance shop, the outer shell 11 is fixed by appropriate means, and the traction wire 27 is linked to, for example, a winch. Is pulled out from the rear of the outer shell 11, and the pulling wire 9 is also pulled out along with the inner shell 12, so that the inside of the outer shell 11 is opened.

At this time, since the engagement groove 20 moves inside the bolt box 16, there is no problem in pulling out the inner shell 12, and the four corner peripheral surfaces of the inner shell 12 engage with the four inner corner surfaces of the outer shell 11. Thus, the stable posture of the inner shell 12 is maintained. As a result, the excavating motor 31 and the like incorporated in the inner shell 12 are opened to a wide work area, and the inside of the outer shell 11 is also opened.
Maintenance inspection work of each part is facilitated, their workability and work efficiency are improved, and this can be performed precisely.

After the above maintenance and inspection work is completed, the outer shell 11 is fixed by appropriate means, the pulling wire 9 is linked to, for example, a winch, etc., and is driven to drive the inner shell 12 and the excavating motor 31 and the like incorporated therein. Pulled into the outer shell 12 and the pulling wire 27
Is also pulled into the inner shell 12.

At this time, since the engagement groove 20 moves inside the bolt box 16, there is no obstacle to the drawing of the inner shell 12, and the four corners of the inner shell 12 are engaged with the four inner surfaces of the outer shell 11. Thus, the stable posture of the inner shell 12 is maintained. And
If the winch is stopped when the rubber packing 22 comes into contact with the contact piece 14, the four corners of the inner shell 12 engage the four inner corners of the outer shell 11, and the inner shell 12 is assembled into the outer shell 11.

After the inner and outer shells 11 and 12 have been assembled in this way, when the under-track crossing work is performed using this excavator, this is transported to the starting side 28 and the plurality of buried members 10 are moved to the starting side 28. And one of them is connected to the rear end of the outer shell 11. At this time, the front end of the embedded member 10 is abutted against the rear end of the outer shell 11, a bolt 18 is inserted into the bolt insertion hole 17 of the bolt box 16, and a nut 19 is screwed into the end of the screw shaft. Tighten.

Thereafter, the excavator is positioned at the position to be excavated on the starting side 28, and the ground 1 is bored by horizontal boring (not shown). Is connected to each towing jack 8 installed on the arrival side 6.

Then, the towing jack 8 is operated to pull the towing wire 9 to the arrival side 6 and the excavating motor 3
1 and a vacuum pump (not shown) are driven. In this way, the drive shaft 33 is driven, the cutter head 35 and the screw auger 34 rotate, excavating the ground 1 around the face, guiding the excavated earth and sand to the stirring chamber 30 of the inner shell 12,
This is guided from the earth and sand discharge port 36 at the back to the discharge pipe 37,
It is carried out to the starting side 28.

Simultaneously with such excavation, the inner shell 12 is pulled by the pulling wire 9 and moves to the arrival side 6, and the front end of the inner shell 12 is engaged with the contact piece 14 of the outer shell 11 on the leading side. The outer shell 11 is pushed and the embedded member 10 connected to the rear end is pulled in the same direction. In this case, the bolt box 16 is protruded inward, and the outer shell 11 and the buried member 10 are formed to have a flat peripheral surface. Resistance can be reduced, and the burden on the towing jack 8 can be reduced.

In this way, the outer shell 11, the embedded member 10 and the inner shell 12 move integrally, and the pulling wire 27 moves together with the outer shell 11, the predetermined distance from the starting side 28, that is, the approximate length of the embedded member 10. When it has moved, the operation of the towing jack 8 and the operation of the excavating motor 31 and the vacuum pump are stopped,
At the rear end of the outer shell 11, a new embedded member 1 is provided in the same manner as described above.
0, and then the operation of the towing jack 8 and the like is restarted. Thereafter, the excavation and the connection of the buried member 10 are repeated until the outer shell 11 reaches the arrival side 6.

At the time of such excavation, as shown in FIG. 2, when an obstacle 38 such as a rock or a concrete block appears on the face side,
The amount of earth removal decreases, the amount of propulsion of the inner and outer shells 11 and 12 decreases, and the rotation speed and hydraulic pressure of the excavating motor 31 increase.
This situation is detected by a measuring instrument (not shown) provided on the starting side 28 or the arrival side 6, and for example, the towing operation of the towing jack 8 is stopped based on the data.

At this time, the driving of the excavating motor 31 and the vacuum pump (not shown) is continued for a predetermined time, and when the excavated earth and sand in the stirring chamber 30 has been discharged, the driving of the excavating motor 31 is stopped. Then, one end of the pulling wire 27 located on the starting side 28 is connected to, for example, a winch (not shown) installed on the starting side 28, and the winch (not shown) is driven.

Thus, the inner shell 12 and the excavating motor 3 incorporated therein are pulled by the pulling wire 27.
1, screw auger 34, cutter head 35
Then, the discharge pipe 37 and the like move to the starting side 28 along the outer shell 11, and are pulled by the inner shell 12 so that the pulling wire 9 is pulled back into the outer shell 11.

At this time, since the engagement groove 20 moves inside the bolt boxes 16, 16, there is no problem in pulling out the inner shell 12, and the four corner peripheral surfaces of the inner shell 12 are engaged with the four inner corner surfaces of the outer shell 11. In combination, the stable posture of the inner shell 12 is maintained. This situation is as shown in FIG.

In this case, a roller is attached to either the inner shell 12 or the outer shell 11 and the buried member 10 and the discharging pipe 37,
If the rollers are arranged so as to be able to run on the inner and outer shells 11 and 12 and the peripheral surface of the buried member 10, the inner shell 12 and the like can be moved smoothly and easily, and the load on the winch can be reduced to reduce its capacity. I can do it.

When the inner shell 12 and the like are pulled out to the starting side 28 in this way, the outer shell 11 and the buried member 10 are left behind on the ground 1, and the pulling wires 9 are located at the four corners inside them. A bolt box 16 protrudes from the inner surfaces of the shell 11 and the embedded member 10, and a large empty space is formed inside the outer shell 11 and the embedded member 10. This situation is as shown in FIG.

Under these circumstances, an operator brings in appropriate excavating equipment and a transporting device to bury the embedding member 10 and the outer shell 1.
1, dig out the obstacle 38 and remove it to the starting side 28. In this case, since the large empty space is formed in the embedded member 10 and the outer shell 11 as described above, the workability is good, the obstacle 38 can be removed smoothly and easily, and the work is robust. Buried member 10
Can be performed inside the outer shell 11, so that the safety of work can be ensured.

After the obstacle 38 is removed, the traction wire 27 is removed from the winch (not shown), the inner shell 12 is positioned at the opening of the start side 28 of the outer shell 11, and the traction jack 8 is operated to operate the traction wire. 9, the inner shell 12 and the excavating motor 31 incorporated therein, and the screw auger 3
4, the cutter head 35, the earth discharging pipe 37 and the like are drawn into the outer shell 11 together.

At this time, since the engagement groove 20 moves inside the bolt box 16, there is no hindrance to pulling in the inner shell 12, and the four corners of the inner shell 12 are embedded in the embedded member 10 and the outer shell 11.
To maintain the stable posture of the inner shell 12. This situation is as shown in FIG.

In this manner, when the operation of the towing jack 8 is stopped when the inner shell 12 and the like have moved to the inner part of the outer shell 11 and the front end thereof has come into contact with the rear part of the abutting piece 14, the inner shell 11 The inner hull 12 is incorporated into the vessel, and the excavation situation is restored.

Thereafter, the towing jack 8 is operated to pull the towing wire 9 to the arrival side 6, and the excavating motor 31 and a vacuum pump (not shown) are driven to resume excavation of the face.

As described above, according to the present invention, when the face obstacle 38 appears, the inner shell 12, the excavating motor 31 incorporated therein, the screw auger 34, and the cutter head 3
5, the earth removal pipe 37 and the like are easily and quickly pulled out from the buried member 10 and the outer shell 11, and a large empty space is formed in the outer shell 11 and the like, so that the obstacle 38 can be safely, reliably and promptly removed. After the removal, the inner shell 12 and the like are easily and quickly drawn into the outer shell 11 and the like, and the excavation of the ground 1 is promptly restarted. Therefore, the present invention is suitable for under-track crossing work in which work is required to be performed during a line closing time when the work time is severely restricted.

[0050]

As described above, according to the first aspect of the present invention, the cutter head and the screw auger are integrally mounted on the inner shell, and the inner shell can be inserted into and removed from the leading conduit or the leading conduit and the embedded member. Since it is attached, the inner shell can be quickly taken in and out of the leading conduit or the leading conduit and the buried member, and when an obstacle such as a rock appears on the face side, the inner shell is pulled out from the leading conduit or the leading conduit and the buried member. By forming a large empty space inside them, the obstacle can be safely, reliably and promptly removed, and the workability thereof can be improved. Also,
Since the inner shell can be pulled out, the maintenance and inspection of the cutter head and screw auger attached to the inner shell, the leading conduit and the buried member can be easily and quickly performed. Then, after removing the obstacle, the inner shell is quickly drawn into the leading pipe or the leading pipe and the buried member, so that the excavation work can be promptly restarted, and the smoothness and speed of the construction can be secured.

According to the second aspect of the present invention, since the peripheral surface of the inner shell is engaged with the front pipe or the front pipe and the inner surface of the buried member, it is possible to prevent the inner shell from swaying during excavation and to stabilize the inner shell. Excavation work can be promoted, and the inner shell can be smoothly and stably taken in and out when an obstacle appears or after the obstacle is removed. In the invention of claim 3, the distal end of the inner shell is detachably provided to the distal end of the leading conduit so that the distal end of the inner shell can be pulled toward the arrival side. The excavation can be performed by engaging the leading end of the conduit and moving the leading conduit or the leading conduit and the embedded member to the inner shell.

According to a fourth aspect of the present invention, since the pulling wires which can be pulled in different directions are attached to the front end portion and the rear end portion of the inner shell, the inner shell is moved in different directions during excavation and withdrawal. As well as withdrawing the inner shell by the wire,
The pull-in can be performed easily and quickly. According to the invention of claim 5, a bolt box through which a bolt can be inserted is protruded inward at a connection portion between the leading conduit and the buried member so that the leading conduit, the buried member, and the buried member can be connected to each other via the bolt box. Therefore, the connection between them can be realized, and the movement resistance of the front pipe and the buried member in the ground can be reduced.

According to a sixth aspect of the present invention, since the engaging groove capable of receiving the bolt box is provided in the axial direction on the peripheral surface of the inner shell, the inner shell can be quickly pulled out and inserted from the leading conduit or the leading conduit and the embedded member. can do. The invention of claim 7 is
The inner shell is equipped with a discharge pipe communicating with a vacuum pump, and the discharge mechanism for excavated earth and sand is made to be able to be pulled out from the leading pipe and the buried member, so that a wider empty space is formed inside the leading pipe and the buried member, The workability and safety of removing the obstacle can be improved, and the maintenance and inspection of the discharge pipe can be easily performed.

According to the eighth aspect of the present invention, a cutter head and a screw auger are integrally mounted on an inner shell, and the inner shell is removably mounted on a leading conduit or a leading conduit and a buried member. When an object appears, the inner shell is pulled out from the leading conduit or the leading conduit and the buried member, and a large empty space is formed inside the leading conduit or the leading conduit and the buried member, and obstacles can be removed through the space. Therefore, the obstacle can be safely, reliably and promptly removed, and the workability can be improved.

According to a ninth aspect of the present invention, a pulling wire capable of being pulled in different directions from each other is attached to a front end portion and a rear end portion of the inner shell, and one of the pulling wires is pulled toward the face during excavation. When the shell is pulled out, the other pulling wire is pulled in the direction opposite to the face side, so that the inner shell can be easily taken in and out via the pulling wire. According to the tenth aspect of the present invention, after the obstacle is removed, the one pulling wire is pulled toward the face, and the inner shell can be drawn into the front pipe or the inside of the front pipe and the buried member. After the removal, the inner shell can be quickly drawn into the leading pipe or the leading pipe and the buried member, and the excavation work can be promptly restarted, and the smoothness and speed of the construction can be secured. Therefore,
There is an effect suitable for under-track crossing work in which the work is forced to be performed during a closed time when the work time is severely restricted.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and shows a state of under-track crossing work.

FIG. 2 is a front view of the apparatus of the present invention, showing an excavation state thereof.

FIG. 3 is a front view of a distal end portion of a front conduit applied to the apparatus of the present invention.

FIG. 4 is a perspective view showing a state of a connecting portion between a leading conduit and a buried member applied to the apparatus of the present invention.

FIG. 5 is a perspective view showing an inner shell applied to the device of the present invention.

FIG. 6 is a front view of a tip portion of an inner shell applied to the device of the present invention.

FIG. 7 is a sectional view taken along the line AA of FIG. 4;

FIG. 8 is a sectional view showing an excavation situation according to the present invention, in which an obstacle appears on the face and the inner shell is slightly pulled out.

FIG. 9 is a cross-sectional view showing an excavation situation according to the present invention, in which an obstacle appears on a face and the inner shell is drawn out from the front pipe and the buried member to the outside.

FIG. 10 is a cross-sectional view showing a state of excavation according to the present invention, showing a halfway state in which an excavator is pulled into a front pipe and a buried member after removing an obstacle that has appeared on a face.

[Explanation of symbols]

 6 Ground 9,27 Pulling wire 10 Buried member 11 Conduit (outer shell) 12 Inner shell 16 Bolt box 18 Bolt 34 Screw auger 35 Cutter head 34 Screw auger 37 Drainage pipe 38 Obstacle

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[Procedure amendment]

[Submission date] April 2, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

[SUMMARY OF To this end, the invention is claimed in claim 1, arranged and lead pipe and an inner shell inside and outside dual allows connecting the embedded member to the rear end of the destination conduit, said Integrated cutter head and screw auger inside shell
The tip conduit is pushed toward the face to excavate the ground.
And the inner shell can be relatively moved with respect to the leading conduit, and the inner shell can be pulled in different directions from each other.
Equipped with a suitable pulling wire, and
To the opposite side to bring the inner shell
It can be pulled out of the embedded member and the other pulling wire
To the face side so that the inner shell is
It is possible to pull in the inside of the buried member, for example, when an obstacle such as rock appears on the face side, pull out the inner shell from the leading conduit or the leading conduit and the buried member, forming a wide empty space inside them, Remove the obstacle safely and reliably and quickly to improve its workability, and after removing the obstacle, immediately pull the inner shell into the front pipe or the front pipe and the buried member, and resume the excavation work promptly It is made possible to ensure the smoothness, safety and speed of construction. Further, the cutter head and the screw auger are pulled out together with the inner shell, and the maintenance and inspection thereof and the maintenance and inspection of the leading pipe and the buried member can be easily performed.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, the tip of the inner shell is
It is provided detachably at the tip of the conduit, and when excavating, the tip of the inner shell
Can be engaged with the distal end of the front conduit, and the inner shell can be pulled out.
Sometimes the tip of the inner shell can be disengaged from the tip of the leading conduit
And the inner shell for the leading conduit or the leading conduit and the buried member
Pulling out or pulling in, excavation and obstacle removal
It is possible to respond easily and quickly when leaving.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

According to a third aspect of the present invention, the front conduit and the buried member are provided.
Are made of steel pipes with a rectangular cross section, and
With a bolt box protruding that can insert bolts
In addition, the inner shell can be engaged with the front conduit and the inner surface of the buried member.
The inner shell is made of steel pipe,
Engagement groove that can receive the box is formed along the axial direction, and the front pipe and the embedded member can be connected to each other.
As well as quickly remove and insert the inner shell
I'm trying.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, the front conduit and the inner shell are formed inside and outside.
Doubly arranged and connect the buried member to the rear end of the front conduit
And the cutter head and screw auger inside the inner shell
And rotatably supported, and the leading conduit is pushed toward the face to
In the excavation method of an excavator for excavating a drill,
Head and screw auger are integrated
Then, the inner shell is inserted and removed between the leading conduit or the leading conduit and the buried member.
When an obstacle appears on the face side,
Pull out the shell from the front conduit or the front conduit and the buried member, and
Obstacles can be removed via conduit or front conduit and buried members
And wide inside the front pipe or the front pipe and the buried member
Creates an empty space and safely, reliably and quickly obstructs obstacles
Removed and improved its workability
You.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

According to a fifth aspect of the present invention, the inner shell is anisotropic to each other.
Equipped with a pulling wire that can be pulled in
Pull the pulling wire toward the face, and pull out the inner
The towing wire in the opposite direction to the face
Easy and quick access to the inner shell through the wire
I am trying to.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

According to a sixth aspect of the present invention, after removing the obstacle, the one tow wire is pulled toward the face and the inner shell is guided.
Can be drawn into the interior of the pipe or tip conduit and the buried member
After removing the obstacle, bury the inner shell with the front pipe or the front pipe
It can be quickly pulled into the parts and digging work can be resumed promptly.
To ensure smooth and quick construction .

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction contents]

[0050]

As is evident from the foregoing description, the invention of claim 1, arranged and lead pipe and an inner shell inside and outside dual allows connecting the embedded member to the rear end of the destination conduit, said inner shell Install the cutter head and screw auger integrally inside,
It is possible to excavate the ground by pushing the conduit toward the face
In an excavating device wherein the inner shell is relatively movable with respect to the leading conduit , the towing is capable of being pulled by the inner shell in different directions from each other.
Attach the wire and place one of the puller wires on the opposite side of the face.
Pulling the inner shell to the front conduit or the front conduit and the buried member
And pull the other pulling wire to the face side
Pulling the inner shell to the front conduit or the front conduit and the buried member
When an obstacle such as a rock appears on the face side, for example, when an obstacle such as a rock appears on the face side, the inner shell is pulled out from the leading pipe or the leading pipe and the buried member, and a wide empty space is formed therein, Remove obstacles safely, reliably and promptly, improve workability, and after removing obstacles,
Immediately pull the inner shell into the front pipe or the front pipe and the buried member
And excavation work can be resumed promptly,
Security, safety and speed . Also , with the inner shell, cutter head and screw auger,
Also, the leading conduit, the buried member, and the like can be pulled out to the outside so that maintenance and inspection thereof can be performed easily and quickly .

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0051

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, the tip of the inner shell is
It is provided detachably at the tip of the conduit, and when excavating, the tip of the inner shell
Can be engaged with the distal end of the front conduit, and the inner shell can be pulled out.
Sometimes the tip of the inner shell can be disengaged from the tip of the leading conduit
The front conduit or the front conduit and the buried member
The inner shell can be pulled out or pulled in.
It is possible to respond easily and quickly when removing harmful substances.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction contents]

According to a third aspect of the present invention, the front conduit and the buried member are provided.
Are made of steel pipes with a rectangular cross section, and
With a bolt box protruding that can insert bolts
In addition, the inner shell can be engaged with the front conduit and the inner surface of the buried member.
The inner shell is made of steel pipe,
An engagement groove capable of receiving the box is formed along the axial direction, so that the leading pipe and the buried member and the buried member are connected.
As well as quickly remove and insert the inner shell.
I can.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0053

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention , a cutter is provided on the inner shell.
Head and screw auger are attached integrally, and the inner shell
Can be inserted into and removed from the front pipe or the front pipe and the buried member.
When an obstacle appears on the face side, the inner shell is
Pull out the front pipe or the front pipe and the buried member,
Obstacles can be removed via pipe or buried member
And a wide empty space inside the leading conduit or the leading conduit and the buried member.
Create a pace and remove obstacles safely, reliably and quickly
And the workability can be improved.

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0054

[Correction method] Change

[Correction contents]

According to a fifth aspect of the present invention, the inner shell is anisotropic to each other.
Equipped with a pulling wire that can be pulled in
Pull the pulling wire toward the face, and pull out the inner
Was pulled in the opposite direction to the face side,
Easy and quick access to the inner shell through the traction wire
Can be.

[Procedure amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0055

[Correction method] Change

[Correction contents]

According to a sixth aspect of the present invention, after removing the obstacle, the one tow wire is pulled toward the face, and the inner shell is guided.
Can be drawn into the interior of the pipe or tip conduit and the buried member
Therefore, after removing the obstacle, the inner shell is
Immediately pull into the buried member and resume the excavation work promptly.
It can be opened to ensure smooth and quick construction . Therefore, there is an effect suitable for under-track crossing work in which the work is forced to be performed during a line closing time where the work time is severely restricted.

Continuation of the front page (72) Inventor Mitsuo Chichiiwa 2-3-5 Misakicho, Chiyoda-ku, Tokyo Iron Construction Construction Co., Ltd. (72) Inventor Yasuhiro Ito 2-chome Misakicho, Chiyoda-ku, Tokyo No. 5-3 Iron Building Construction Co., Ltd.

Claims (10)

[Claims] 1. A front pipe and an inner shell are double-laid inside and outside, an embedded member can be connected to a rear end of the front pipe, and a cutter head and a screw auger are rotatably supported inside the inner shell. In a digging apparatus in which the front pipe is propelled toward the face to excavate the ground, a cutter head and a screw auger are integrally mounted on the inner shell, and the inner shell is embedded with the front pipe or the front pipe. Drilling equipment that can be inserted into and removed from components 2. The excavator according to claim 1, wherein a peripheral surface of the inner shell is mounted so as to be engageable with an inner surface of the leading pipe or the leading pipe and the buried member. 3. The excavator according to claim 1, wherein a tip portion of the inner shell is detachably provided on a tip portion of the front pipe, and the tip portion of the inner shell is towable to the arrival side. 4. The excavator according to claim 3, wherein a pulling wire that can be pulled in directions different from each other is attached to a front end portion and a rear end portion of the inner shell. 5. The claim wherein a bolt box through which a bolt can be inserted is protruded inward at a connection portion between the leading conduit and the buried member, and the leading conduit, the buried member, and the buried member can be connected to each other via the bolt box. Item 7. The excavator according to Item 1. 6. The excavator according to claim 5, wherein an engagement groove capable of receiving the bolt box is provided in an axial direction on a peripheral surface of the inner shell. 7. The excavator according to claim 1, wherein a discharge pipe communicating with a vacuum pump is mounted on the inner shell. 8. A front pipe and an inner shell are double-laid inside and outside, an embedded member is connected to a rear end of the front pipe, and a cutter head and a screw auger are rotatably supported inside the inner shell. In a method of excavating an excavating device for excavating the ground by propelling a front pipe to a face side, a cutter head and a screw auger are integrally mounted on the inner shell, and the inner shell is embedded with the front pipe or the front pipe. It is attached to the member so that it can be inserted and removed, and when an obstacle appears on the face side, the inner shell is pulled out from the leading conduit or the leading conduit and the embedded member, and the obstacle is removed via the leading conduit or the leading conduit and the embedded member. Drilling method of drilling equipment made removable. 9. A pulling wire capable of being pulled in different directions from each other is attached to a front end portion and a rear end portion of the inner shell, one of the pulling wires is pulled toward the face during excavation, and the other is pulled out when the inner shell is pulled out. 9. The excavating method for an excavator according to claim 8, wherein the towing wire is pulled in a direction opposite to the face side. 10. The excavator according to claim 9, wherein, after removing the obstacle, the one pulling wire is pulled toward the face, and the inner shell can be drawn into the front pipe or the inside of the front pipe and the buried member. Drilling method.