JP2002188391A - Tunnel excavator, and dismantling method to tunnel excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover structures composing an excavator to be reutilized in a tunnel excavator and enable the structure to be reused. SOLUTION: In this tunnel excavator 10, a cutter drive 13 having a plurality of drive motors 12 is installed on the front part of the excavator main body 11 of a cylindrical form. A cutter head 14 is supported by the cutter drive 13 to be rotated, and the cutter drive 13 is composed as a unit to be attachable to/detachable from the excavator main body 11 by bolts 23. The cutter head 14 is composed to be attachable to/detachable from the cutter drive 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator capable of recovering a cutter head and a cutter driving device of the cutter head after excavating a tunnel of a predetermined length by propelling the tunnel excavator and the tunnel excavator. Dismantling method.

[0002]

2. Description of the Related Art Generally, in a shielded excavator, a disk-shaped cutter head is rotatably mounted on a front portion of a cylindrical excavator body, and the cutter head is rotatably supported by a cutter driving device. On the other hand, a large number of shield jacks for advancing the excavator body are mounted on the rear portion, and an erector device for mounting a segment on the inner wall surface of the existing tunnel is mounted. Therefore, when the shield jack is extended while rotating the cutter head by the cutter driving device, the excavator body moves forward by obtaining the reaction force from the existing segment, and a number of cutter bits attached to the cutter head make the front ground clear. Drilling and
A tunnel can be formed.

When a tunnel is constructed in a predetermined construction section using such a shield excavator, a starting shaft and a reaching shaft are excavated in advance in this construction section, and the shield excavator is carried into the starting shaft. In a state where the excavation reaction force is secured in the starting shaft, excavation is performed along a predetermined route by penetrating the ground from the starting port. Then, when the shield excavator digs into the reaching shaft, the shield body is pulled out from the reaching hole formed in advance into the reaching shaft. In this way, a tunnel is constructed at a predetermined position.

[0004] The shield excavator that has reached the reaching shaft is dismantled and partly collected on the ground, while the rest is buried underground as a tunnel structure. That is, in the shield excavator, first, the cutter head is divided into small pieces by a gas cutter or the like, and the cutter head is lifted to the ground through a reaching shaft by a crane. And is lifted to the ground by a crane through a reaching shaft. The shield jack, the erector device, the earth discharging device (such as a mud pipe, a mud pipe, an agitator, and a screw conveyor) are removed from the excavator body and lifted to the ground by a crane. On the other hand, the remaining excavator body is connected to the existing segment and buried as a part of the tunnel structure. Then, the cutter head that has been cut and lifted to the ground, its cutter driving device, and the like are generally disposed of.

[0005]

However, from the viewpoint of the global environment, an increase in industrial waste due to waste treatment is not preferable, and reuse is desired. In this case, since the cutter head is pressed against the ground with its front surface being excavated, the cutter bit is severely worn, and replacement of the cutter bit may make it possible to reuse the cutter bit. Further, since the cutter driving device of the cutter head is disposed on the excavator body side separated by the bulkhead, there is a case where the cutter driving device can be reused by maintenance with little damage. Therefore, at least reuse of the cutter head and the cutter driving device is desired.

An object of the present invention is to solve such a problem, and to provide a tunnel excavator and a method of dismantling the tunnel excavator, which enable a structure constituting the excavator to be recovered and reused. Aim.

[0007]

According to a first aspect of the present invention, there is provided a tunnel excavator having a tubular excavator main body and a detachably mounted front end of the excavator main body. A cutter driving device having a cutter driving motor; and a cutter head disposed at a front portion of the excavator main body and rotatable by the cutter driving device.

[0008] The cutter drive motor constituting the cutter drive device can be reused by performing maintenance and inspection, and an increase in industrial waste due to collection and disposal is suppressed. In this case, the cutter driving device is detachable with respect to the excavator main body. Is also good. Therefore, the cutter driving device may be attached to the excavator body by any method. The cutter driving device is fitted to the inner peripheral surface of the body of the excavator body and directly bolted, or the cutter driving device is excavated. A bolt may be fastened to a flange formed on the machine body.

According to a second aspect of the present invention, the cutter driving device has an output transmitting portion for transmitting an output of the cutter driving motor, and the cutter head is detachably connected to the output transmitting portion. It is characterized by:

[0010] In the tunnel excavator according to the third aspect of the present invention, a mounting portion is provided on an inner peripheral surface of the excavator body, and the cutter driving device is inserted from one of a front side and a rear side of the excavator body. And is fixed to the mounting portion.

In the tunnel excavator according to a fourth aspect of the present invention, the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator main body, and the cutter driving device is provided from the front of the excavator main body. It is characterized by being fitted to the peripheral surface and being bolted to the mounting flange.

According to a fifth aspect of the present invention, the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator body, and the cutter driving device is disposed on an inner peripheral side of the mounting flange. A connecting member that is provided and divided into a plurality of parts in the circumferential direction is fitted into a groove formed on the outer peripheral surface of the cutter driving device, and the connecting member is bolted to the mounting flange.

[0013] In the tunnel excavator according to the invention of claim 6, the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator body, and the cutter driving device is disposed on an inner peripheral side of the mounting flange. And is bolted to the mounting flange via a connecting ring.

According to a seventh aspect of the present invention, there is provided a method for dismantling a tunnel excavator, wherein the tunnel excavator is propelled to excavate a tunnel, and the tunnel excavator is stopped at a predetermined position where a predetermined construction section has been excavated. The cutter head and the cutter driving device at the front are separated from the body of the excavator having a cylindrical shape, and the cutter driving device is collected on the ground through a front reaching shaft or an existing tunnel behind.

In the method for dismantling a tunnel excavator according to the invention of claim 8, after the cutter head is separated from the cutter driving device and collected on the ground through the reaching shaft,
The cutter driving device is separated from the excavator body and collected on the ground through the reaching shaft.

In the method for dismantling a tunnel excavator according to a ninth aspect of the present invention, a propulsion jack, an erector device, and an earth removal device mounted on a rear portion of the excavator body are separated and collected on the ground through an existing tunnel and a shaft. Then, the cutter head and the cutter driving device are separated from the excavator body to be a single unit, and the cutter driving device and the cutter head are separately collected on the ground through an existing tunnel and a shaft.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic sectional view of a tunnel excavator according to a first embodiment of the present invention, and FIGS. 2 to 4 are schematic views showing a method of disassembling the tunnel excavator according to the first embodiment.

As shown in FIG. 1, in a tunnel excavator 10 according to this embodiment, an excavator body 11 has a cylindrical shape, and a cutter driving device 13 having a plurality of driving motors 12 is mounted on a front portion thereof. The cutter head 14 is rotatably supported by the device 13. The cutter drive device 13 is unitized and detachable from the excavator body 11. The cutter head 14 is attached to the cutter drive device 13. 14 is detachable.

That is, the excavator body 11 has a mounting flange 15 formed on the inner peripheral surface of the front part along the circumferential direction. on the other hand,
In the cutter driving device 13, a ring gear 18 is rotatably supported by a bearing 17 in a casing 16 having a box shape, and a plurality of drive motors 12 are mounted on a rear portion thereof. Are engaged. The ring gear 18 extends forward to form a connecting flange 20 as an output transmitting portion, and a connecting flange 21 of the cutter head 14 is fastened to the connecting flange 20 by a bolt 22. The casing 16 of the cutter driving device 13 is
Are fastened by bolts 23 and nuts 24 at positions where they are fitted to the inner peripheral surface of the mounting flange 15 and come into contact with the mounting flange 15. Accordingly, when the drive motor 12 is driven to rotate the drive gear 19, the cutter head 14 can be rotated via the ring gear 18.

At the rear of the excavator body 11, a mounting flange 25 is formed along the circumferential direction, and a plurality of shield jacks 26 are arranged on the mounting flange 25 along the circumferential direction. Is extruded rearward in the excavation direction and pressed against an existing segment constructed on the inner peripheral surface of the excavated tunnel, whereby the excavator body 11 can be advanced by the reaction force. Further, the excavator body 11
A swivel ring 27 is pivotably supported at the rear part, and an erector device 28 for assembling segments is mounted on the swivel ring 27.

At the front end of the excavator body 11, a chamber 29 is formed at the rear of the cutter head 14, and a mud feed pipe and a drain pipe (not shown) are opened in the chamber 29 and an agitator is provided. Is attached, and the earth and sand excavated by the cutter head 14 can be taken into the chamber 29, stirred by the muddy water sent from the mud pipe and the agitator, and discharged to the outside through the mud pipe.

Here, a description will be given of a tunnel excavating operation and a dismantling and collecting operation of the excavating machine by the tunnel excavating machine 10 of the present embodiment configured as described above.

In order to excavate and form a tunnel, first, a starting shaft having a predetermined depth is excavated at an excavation start position, a tunnel excavator 10 is carried into the starting shaft, set at a predetermined position, and driven in this state. Cutter head 1 by motor 12
While rotating 4, the plurality of shield jacks 26 are extended, the excavator body 11 is advanced by the pressing force against the reaction force receiver in the starting shaft, and the tunnel excavation work is started by excavating the standing wall of the starting shaft. Excavated earth and sand generated by ground excavation of the cutter head 14 when the excavator body 11 advances is taken into the chamber 29 and discharged to the outside by a mud pipe, and the erector device 28 removes the segment carried into the existing tunnel. Grasp and assemble in a ring shape on the inner wall of the existing tunnel to construct the tunnel.

On the other hand, as shown in FIG. 2, a reaching shaft T having a predetermined depth is excavated in advance at the excavation end position, and a tunnel constructed from the starting shaft by the tunnel excavator 10 is communicated with the reaching shaft T. . When the tunnel construction in the predetermined section is completed as described above, the tunnel excavator 10 is dismantled, a part of the tunnel is reached from the reaching shaft T using the crane C, and the rest is buried as a tunnel structure.

First, as shown in FIGS. 1 and 3, each bolt 22 is loosened by a tool (not shown) to
The cutter head 14 is removed from the cutter driving device 13 and the cutter head 14 is moved forward by a dedicated jack along a rail (not shown) laid in the reaching shaft T. The hanging jig 1 is attached to the cutter head 14.
4a is attached by welding, and the crane C installed on the ground
The rope L is lowered into the reaching shaft T from above, the tip of the rope L is connected to the hanging jig 14a, and the cutter head 14 is pulled up to the ground by the operation of the crane C and collected.

Next, as shown in FIGS. 1 and 4, each bolt 23 is loosened by a tool (not shown) to
The cutter driving device 13 is removed from the above, and like the cutter head 14 described above, the cutter driving device 13 is moved forward by a dedicated jack along a rail laid in the reaching shaft T. Then, a hanging jig 13a is attached to the cutter driving device 13 by welding, a rope L is dropped from the crane C on the ground into the reaching shaft T, and a tip end of the rope L is connected to the hanging jig 13a. The cutter head 14 is operated by the operation of the crane C.
Is lifted to the ground and collected.

After the cutter head 14 and the cutter driving device 13 have been removed from the excavator body 11 and collected by the above-described operation, the shield jack 26, the elector device 28, the mud feed pipe, the mud drain pipe, the agitator, various sensors, etc. Is removed and collected from the arrival shaft T. The excavator body 11 remaining in the ground contacts the existing segment S by welding or casting concrete, and is used as a tunnel structure.

As described above, the tunnel excavator 1 of the present embodiment is
0, a cutter driving device 13 having a plurality of driving motors 12 is detachably mounted on a cylindrical excavator body 11 from the front, and a cutter head 14 is detachably mounted on the cutter driving device 13. Drive rotation.

Therefore, after completion of the tunnel excavation work, the cutter head 14 and the cutter driving device 1
3 can be removed and recovered from the arrival shaft T using the crane C, and can be reused by installing the cutter drive unit 13 after collection, thereby suppressing an increase in industrial waste due to waste treatment. Can be.

In this case, the main body of the cutter head 14 can be reused, and the worn cutter bit may be replaced with a new one. Further, the cutter driving device 13 removes the driving motor 12, disassembles and inspects the gear portion, and performs necessary maintenance. The required output of the cutter driving device 13 differs depending on the diameter of the excavation tunnel and the type of excavation ground. However, by making a large number of drive motors 12 detachable, the number of mounted drive motors 12 is selected according to the required output. Good.

In the above-described embodiment, the cutter head 14, the cutter driving device 13, and the like are recovered from the reaching shaft T to the ground. However, when the reaching shaft cannot be excavated, the shaft is transported backward and passed through the existing segment. You may make it collect | recover. FIG. 5 is a schematic sectional view of a tunnel excavator according to a second embodiment of the present invention, FIG. 6 is a schematic diagram showing a method of dismantling the tunnel excavator of the second embodiment, and FIG.
1 shows a schematic cross section of a tunnel excavator according to an embodiment.

As shown in FIG. 5, in the shield excavator 30 of the second embodiment, a cylindrical excavator body 31 is formed.
Is mounted with a cutter driving device 33 having a plurality of driving motors 32 at a front portion thereof, and the cutter driving device 33 supports the cutter head 34 so as to be able to drive and rotate. The cutter head 34 is detachable from the cutter driving device 33.

That is, the front inner peripheral surface of the excavator body 31
A mounting flange 35 is formed along the circumferential direction. On the other hand, the cutter driving device 33 is provided with a casing 36 having a box shape.
A ring gear (not shown) is rotatably supported therein, and drive gears of a plurality of drive motors 32 mesh with each other. Also,
The ring gear extends forward to form a connection flange 37 as an output transmission portion, and a connection flange 38 of the cutter head 34 is fastened to the connection flange 37 by a bolt 39. The casing 36 of the cutter driving device 33 is located on the inner peripheral side of the mounting flange 35,
A bolt 41 is connected via a split flange 40 as a connecting member.
Has been concluded. The split flange 40 has a fan shape obtained by dividing a ring member having a predetermined width in the circumferential direction. The split flange 40 is wedge-fitted to the outer circumferential groove 36 a of the casing 36 and fitted to the concave portion 35 a of the mount flange 35. It is fastened to 35 by bolts 41.

A plurality of shield jacks 43 are arranged along the circumferential direction on a mounting flange 42 formed at the rear portion of the excavator main body 31, and a swing ring 44 is swingably supported. Is mounted with an erector device 45 for assembling the segments.

Therefore, in order to excavate and form a tunnel, the tunnel excavator 30 is loaded into the starting shaft and the driving motor 3
While rotating the cutter head 34 by 2, the plurality of shield jacks 43 are extended, the excavator body 31 is advanced by the pressing force against the reaction force receiver in the starting shaft, and the excavation wall of the starting shaft is excavated to perform tunnel excavation work. To start.
Thereafter, when a tunnel of a predetermined length is constructed by the tunnel excavator 30, excavation is stopped. Here, as shown in FIG. 6, first, the shield jack 43, the erector device 45, the mud feed pipe, the mud drain pipe, the agitator, various sensors, etc. are removed and collected.

Subsequently, the bolts 39 are loosened to remove the cutter head 34 from the cutter driving device 33 of the excavator body 31, and the bolts 41 are relaxed to remove the divided flanges 40. Cutter driving device 3
Remove 3 Then, the cutter driving device 33 is conveyed backward by a winch or the like (not shown), placed on the carriage A laid on the existing segment S and movable along the rail R, moved backward and collected from the starting shaft. The cutter head 34 is generally severely worn. Therefore, the cutter head 34 is cut to a size that allows the cutter head 34 to pass through the inside of the excavator body 31 without being collected, and is mounted on the carriage A and carried out. Then, the excavator main body 31 remaining in the ground is joined to the existing segment S by welding or concrete casting and used as a tunnel structure.

As described above, the shield excavator 3 of the present embodiment
At 0, a cutter driving device 33 having a plurality of driving motors 32 is detachably mounted on a cylindrical excavator main body 31 by a split flange 40. Therefore, after the end of the tunnel excavation work, the cutter head 34 and the cutter driving device 33 are removed from the excavator main body 31, and the cutter driving device 33 is moved backward through the inside of the excavator main body 31 and the existing tunnel. Recovering from the shaft to the ground enables reuse, thereby suppressing an increase in industrial waste due to disposal.

As shown in FIG. 7, in the shield excavator 50 of the third embodiment, a cylindrical excavator body 51 is formed.
Is mounted with a cutter driving device 53 having a plurality of driving motors 52 at a front portion thereof, and the cutter driving device 53 supports a cutter head 54 so that the cutter head 54 can be driven and rotated. The cutter head 54 is detachable from the cutter driving device 53.

That is, on the inner peripheral surface of the front part of the excavator body 51,
A mounting flange 55 is formed along the circumferential direction. On the other hand, the cutter driving device 53 has a box-shaped casing 56.
A ring gear 58 is rotatably supported by a bearing 57 therein, and a plurality of drive motors 52 are mounted on a rear portion thereof.
A drive gear 59 of each drive motor 52 meshes with the ring gear 58. The ring gear 58 extends forward to form a connection flange 60 as an output transmission portion, and a connection flange 61 of the cutter head 54 is fastened to the connection flange 60 by a bolt 62. Then, the casing 56 of the cutter driving device 53 is located on the inner peripheral side of the mounting flange 55, and the connecting ring 63 as a connecting member is provided between the casing 56 and the mounting flange 55, and the bolts 64, 65 It is concluded.

A plurality of shield jacks 67 are provided along the circumferential direction on a mounting flange 66 formed at the rear portion of the excavator body 51, and a turning ring 68 is supported so as to be able to turn. An erector device 69 for assembling a segment is mounted on the erection device.

Accordingly, in order to excavate and form a tunnel, the tunnel excavator 50 is loaded into the starting shaft and the driving motor 5 is driven.
While rotating the cutter head 54 by 2, the plurality of shield jacks 67 are extended and the excavator body 51 is advanced by the pressing force against the reaction force receiver in the starting shaft, and the tunnel wall is excavated by the standing wall of the starting shaft. To start.
Thereafter, when a tunnel of a predetermined length is constructed by the tunnel excavator 50, the excavation is stopped, and the tunnel excavator 50 is stopped.
The dismantling and collection work of the members constituting is performed.

That is, first, the shield jack 67, the elector device 69, the sludge pipe, the sludge pipe, the agitator, various sensors and the like are removed and collected. Subsequently, the bolts 62 are loosened to remove the cutter head 54 from the cutter driving device 53 of the excavator body 51, and the bolts 64 and 65 are loosened to remove the connecting ring 63. The device 53 is removed. Then, the cutter driving device 53 is conveyed rearward by a winch or the like, is mounted on a trolley, moves rearward, and is collected from the starting shaft. On the other hand, the excavator main body 51 remaining in the ground is joined to an existing segment by welding or concrete casting and used as a tunnel structure.

As described above, the shield excavator 5 of the present embodiment
0, a plurality of drive motors 5
A cutter driving device 53 having a cutting device 2 is detachably mounted by a connecting ring 63. Therefore, after the end of the tunnel excavation work, the cutter head 54 and the cutter driving device 53 are removed from the excavator main body 51, and the cutter driving device 53 is collected on the ground from the shaft or the starting shaft on the way through the excavator main body 51 and the existing tunnel. By doing so, reuse becomes possible.

In the second and third embodiments described above,
The cutter driving devices 33 and 53 and the cutter heads 34 and 54 were removed from the excavator main bodies 31 and 51 to the rear, and were collected through the existing tunnel. Can be removed forward and recovered from the arrival shaft. When a trouble occurs during the excavation work and the cutter driving devices 33 and 53 and the cutter heads 34 and 54 are removed for inspection and repair, the cutter driving devices 33 and 54 and the cutter head 34 are removed from the excavator bodies 31 and 51. , 54 can be pulled out to perform various operations.

In the above embodiment, the excavator body 1
Mounting flanges 15, 3 as mounting parts for 1, 31, 51
Although the cutter driving devices 13, 33, and 53 are detachably attached to form the cutters 5 and 55, the cutter driving devices may be fitted to the inner peripheral surface of the excavator body and directly bolted. Further, the cutter driving device 1 is mounted on the excavator main bodies 11, 31, 51.
3, 33, 53 are bolt 23 and nut 23, split flange 40 and bolt 41, connecting ring 63 and bolt 6
4 and 65, the lock mechanism is detachable, but a lock mechanism may be separately provided. Further, although the cutter heads 14 and 34 are of the intermediate support type and the center shaft support type, the present invention can also be applied to a center support type.

In the above-described embodiment, the tunnel excavator of the present invention has been described as a shield excavator for excavating soft ground, but the present invention can also be applied to a tunnel boring machine for excavating rock. Further, although the tunnel excavator of the present invention has been described as a mud shield excavator, it may be a mud pressure shield excavator. In this case, a screw conveyor may be used instead of the water pipe, the drain pipe, and the agitator.

[0048]

As described in detail in the above embodiment, according to the tunnel excavator of the first aspect of the present invention, the cutter driving device having the driving motor at the front of the cylindrical excavator main body is detachable. And the cutter head arranged in front of the excavator body can be driven to rotate by the cutter drive device.After the tunnel excavation work is completed, the cutter drive device is removed from the excavator body to reach the vertical shaft and start. Recovering from a shaft or the like on the ground enables reuse, thereby suppressing an increase in industrial waste due to disposal.

According to the tunnel excavator of the second aspect of the present invention, the cutter head is detachably connected to the output transmitting portion of the cutter driving device, so that the cutter head can be separated from the cutter driving device. By making each cutter drive unit a single unit, reducing its size and weight,
The collection work is facilitated, and the workability can be improved.

According to the third aspect of the present invention, a mounting portion is provided on the inner peripheral surface of the main body of the excavator, and the cutter driving device is inserted from one of the front and rear sides of the main body of the excavator. Since the cutter driving device is fixed to the attachment portion, the workability can be improved by collecting the cutter driving device from the front reaching shaft or the rear starting shaft.

According to the tunnel excavator of the fourth aspect, the mounting portion is a mounting flange formed on the inner peripheral surface of the excavator main body, and the cutter driving device is fitted to the inner peripheral surface from the front of the excavator main body. In this case, since the bolt is fastened to the mounting flange, the cutter driving device can be easily mounted at an appropriate position. On the other hand, the cutter driving device can be easily removed and collected from the reaching shaft, thereby improving workability.

According to the tunnel excavator of the fifth aspect, the mounting portion is a mounting flange formed on the inner peripheral surface of the excavator body, and the cutter driving device is disposed on the inner peripheral side of the mounting flange. The coupling member divided into a plurality in the circumferential direction was fitted into a groove formed on the outer peripheral surface of the cutter driving device, and the coupling member was bolted to the mounting flange, so that the cutter driving device was collected backward through the inside of the excavator body. By doing so, the cutter driving device can be easily collected even in a place where the reaching shaft is not excavated.

According to the tunnel excavator of the sixth aspect, the mounting portion is a mounting flange formed on the inner peripheral surface of the excavator body, and the cutter driving device is disposed on the inner peripheral side of the mounting flange. Since the bolt was fastened to the mounting flange via the connection ring, by collecting the cutter drive device backward,
The cutter driving device can be easily collected even in a place where the reaching shaft is not excavated.

According to the method for dismantling a tunnel excavator of the present invention, the tunnel excavator is propelled to excavate the tunnel, and the tunnel excavator is stopped at a predetermined position where a predetermined construction section has been excavated. Then, the cutter head and cutter driving device in the front part were separated from the excavator body in the form of a cylinder, and the cutter driving device was collected on the ground through the reaching shaft in the front or the existing tunnel in the rear. After the completion of the above, the cutter driving device is removed from the excavator body, and the cutter driving device is recovered from the reaching shaft or the starting shaft on the ground, thereby enabling reuse, thereby suppressing an increase in industrial waste due to disposal.

Further, according to the method for dismantling a tunnel excavator of the present invention, after the cutter head is separated from the cutter driving device and collected on the ground through the reaching shaft, the cutter driving device is separated from the excavator body. Since the cutter head and the cutter driving device are removed from the excavator body and collected, the parts can be reused.

According to the method for dismantling a tunnel excavator according to the ninth aspect of the present invention, the propulsion jack, the erector device, and the earth removal device mounted on the rear portion of the excavator body are separated from each other, and are separated from the ground through an existing tunnel and a shaft. After recovery, the cutter head and cutter driving device were separated from the excavator body to be a single unit, and the cutter driving device and cutter head were separately collected on the ground through the existing tunnel and shaft, so that the tunnel where the reaching shaft could not be excavated Even in this case, members such as the cutter head and the excavator body can be collected on the ground and reused.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a tunnel excavator according to a first embodiment of the present invention.

FIG. 2 is a schematic view illustrating a method of dismantling the tunnel excavator according to the first embodiment.

FIG. 3 is a schematic view illustrating a method of dismantling the tunnel excavator according to the first embodiment.

FIG. 4 is a schematic view illustrating a method of dismantling the tunnel excavator according to the first embodiment.

FIG. 5 is a schematic sectional view of a tunnel excavator according to a second embodiment of the present invention.

FIG. 6 is a schematic view illustrating a method of dismantling a tunnel excavator according to a second embodiment.

FIG. 7 is a schematic sectional view of a tunnel excavator according to a third embodiment of the present invention.

[Explanation of symbols]

 10, 30, 50 Tunnel excavator 11, 31, 51 Excavator main body 12, 32, 52 Drive motor 13, 33, 53 Cutter drive 14, 34, 54 Cutter head 15, 35, 55 Mounting flange (mounting portion) 16 , 36, 56 Casing 18 Ring gear 20, 37, 60 Connection flange (output transmission part) 23, 41, 64, 65 Bolt 26, 43, 67 Shield jack (Propulsion jack) 38, 45, 69 Electa device 40 Split flange (Coupling) Member) 63 connecting flange S segment T reaching shaft

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshimitsu Kumano 1-1-1 Wadazakicho, Hyogo-ku, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Yasuhiro Toyama Town 2067 Komatsu Manufacturing Co., Ltd. (72) Inventor Mitsuhiro Genda 2067 Sekigahara-cho, Fuwa-gun, Gifu Prefecture Komatsu Manufacturing Co., Ltd. F-term (reference) 2D054 AC02 AD01 BA02 BB09 EA01

Claims (9)

[Claims] An excavator body having a cylindrical shape, a cutter drive device detachably mounted on a front portion of the excavator body and having a cutter drive motor, and a cutter drive device disposed at a front portion of the excavator body. And a cutter head rotatable by the cutter driving device. 2. The tunnel excavator according to claim 1, wherein the cutter driving device has an output transmitting portion for transmitting an output of the cutter driving motor, and the cutter head is detachably connected to the output transmitting portion. A tunnel excavator. 3. The tunnel excavator according to claim 1, wherein an attachment portion is provided on an inner peripheral surface of the excavator main body, and the cutter driving device is inserted from one of a front side and a rear side of the excavator main body. And a tunnel excavator fixed to the mounting portion. 4. The tunnel excavator according to claim 3, wherein the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator main body, and the cutter driving device is provided from the front of the excavator main body. A tunnel excavator fitted to an inner peripheral surface and bolted to the mounting flange. 5. The tunnel excavator according to claim 3, wherein the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator body, and the cutter driving device is provided on an inner peripheral side of the mounting flange. A tunnel excavation, wherein a coupling member provided and divided into a plurality of parts in the circumferential direction is fitted into a groove formed on an outer peripheral surface of the cutter driving device, and the coupling member is bolted to the mounting flange. Machine. 6. The tunnel excavator according to claim 3, wherein the mounting portion is a mounting flange formed on an inner peripheral surface of the excavator body, and the cutter driving device is provided on an inner peripheral side of the mounting flange. A tunnel excavator disposed and bolted to said mounting flange via a connecting ring. 7. A tunnel excavator is propelled to excavate a tunnel, the tunnel excavator is stopped at a predetermined position where excavation of a predetermined construction section is completed, and a front cutter head and a cutter driving device are formed into a cylindrical shape. A method for dismantling a tunnel excavator, comprising separating the cutter driving device from the excavator body to be formed and collecting the cutter driving device on the ground through a front reaching shaft or a rear existing tunnel. 8. The method for dismantling a tunnel excavator according to claim 7, wherein the cutter head is separated from the cutter driving device and collected on the ground through the reaching shaft, and then the cutter driving device is separated from the excavator body. A method for dismantling a tunnel excavator, wherein the tunnel excavator is separated and collected on the ground through the arrival shaft. 9. The method for dismantling a tunnel excavator according to claim 7, wherein a propulsion jack, an erector device, and an earth removal device mounted on a rear portion of the excavator body are separated and collected on the ground through an existing tunnel and a shaft. After that, the cutter head and the cutter driving device are separated from the excavator main body to be a single body, and the cutter driving device and the cutter head are separately collected on the ground through an existing tunnel and a shaft. Dismantling method.