JP2001020678A - Erector device and tunnel boring machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve tunnel workability by enabling the assembly works of a timbering at a position near to a face while enhancing the workability of tunnel construction works by facilitating the assembly works of the timbering in an erector device. SOLUTION: A supporting frame 19 is connected at the rear section of the drum 11 of the TBM 10, a rotary ring 34 is supported rotatably to the supporting frame 19 by a revolving roller 33, the first timbering supporting mechanism capable of holding a timbering T and the two second timbering supporting mechanisms are installed to the rotary ring 34, and timbering gripping sections for the second timbering supporting mechanisms can be moved minutely in the circumferential direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel excavator such as a tunnel boring machine and a shield excavator for excavating the ground to construct a tunnel, and an erector device mounted on the tunnel excavator to assemble a support.

[0002]

2. Description of the Related Art A conventional tunnel boring machine has a body composed of a cylindrical front body and a rear body.
A cutter head having a roller cutter is rotatably mounted on a front portion of the front body, and can be driven and rotated by a cutter turning motor. A chamber is formed in the front body by forming a bulkhead so as to prevent excavated waste from entering the interior, and a chamber is formed in the chamber. Is located.

A plurality of thrust jacks are provided between the front body and the rear body. The thrust jacks are expanded and contracted by supplying and discharging hydraulic pressure to the thrust jacks, so that a relative position between the front body and the rear body is provided. Can be changed. Further, a front gripper is mounted on the front body, and the front body can be held in position by extending the gripper shoe in the radial direction by a hydraulic jack. On the other hand, a rear gripper is mounted on the rear trunk, and the rear trunk can be held in position by radially extending the gripper shoe with a hydraulic jack.

Further, an erector device for attaching a support to the inner wall surface of the existing tunnel is mounted at the rear of the rear trunk.

Therefore, when the cutter head is rotated by driving the cutter rotating motor while the rear gripper is held immovable by the rear gripper, each thrust jack is extended to move the cutter head forward with the front body. Then, the roller cutter of the revolving cutter head shears and breaks the rock in front, and excavates the rock. When each thrust jack is extended by a predetermined stroke, the front body is held in position by the front gripper, while the rear body is held out of position by the rear gripper, and then the thrust jack is contracted to draw the rear body toward the front body. Then, again, the rear body is held in position by the rear gripper,
After releasing the position of the front body by the front gripper,
Each thrust jack is extended, the cutter head is moved forward together with the front body, and the rock is excavated by the roller cutter. The tunnel is continuously excavated by repeating this operation.

[0006] Then, the shear generated by the rock excavation is taken into the chamber and discharged to the outside by the belt conveyor. Also, in the process of excavating rock and excavating and forming a tunnel, if the wall surface of the excavated tunnel is stable, no support is required. Using a H-shaped steel or a wooden plate formed in a ring shape as a support, the tunnel is protected so that the rock fragments do not peel off from the wall surface.

[0007]

In the above-described conventional tunnel boring machine, each of the thrust jacks is extended while the rear body is held by the rear gripper, so that the front body and the cutter head are attached to the rear body. While moving forward and excavating the bedrock by the turning cutter head, an H-section steel or the like is formed in a ring shape by an elector device according to the wall surface of the excavated tunnel at the rear of the rear trunk, and the tunnel is used as a support. Installed on the wall to protect the tunnel.

[0008] When excavating highly collapsed ground, it is necessary to carry out landslide assisting work (reinforcement injection, concrete spraying, support assembly or segment assembly) at a location as close as possible to the face of the tunnel boring machine. Is effective. However, in the conventional tunnel boring machine described above, there is no work space for performing such support assembly inside the fuselage, and the support assembly work is performed by an elector device provided behind the rear body. There is a problem that the construction of various auxiliary works is delayed.

The present invention is intended to solve such a problem, and it is possible to assemble a support at a location close to a face, thereby improving tunnel workability and facilitating the work of assembling the support. An object of the present invention is to provide an erector device and a tunnel excavator that improve the workability of construction work.

[0010]

According to a first aspect of the present invention, there is provided an erector device for assembling a support carried into an existing tunnel, the erector device being movable in a longitudinal direction of the existing tunnel. A supporting frame that is supported, a swivel ring that is rotatably supported by a plurality of swiveling rollers on the support frame, swiveling means that swivels the swivel ring, and an existing tunnel that is mounted on the swivel ring and holds a support. A first support and support means movable in a radial direction of the first tunnel; and a plurality of support means which are mounted on the swivel ring on both sides of the first support and support means so as to be movable in the circumferential direction and which can support and support the support and can move in the radial direction of the existing tunnel. And second support means.

[0011] In the elector device according to the second aspect of the present invention, the first support and support means includes an expansion jack fixed to the swivel ring, and a support holding portion movable by the expansion jack in a radial direction of an existing tunnel. And characterized in that:

According to the third aspect of the present invention, the second support means is fixed to the bogie, a bogie movably supported by the swivel ring, a hydraulic jack for moving the bogie. The present invention is characterized in that it has an extended jack, and a support gripper that can be moved in the radial direction of the existing tunnel by the extended jack.

[0013] In the above-mentioned aspect, the second support means may include an expansion jack fixed to the swivel ring, and a movable table movable in a radial direction of the existing tunnel by the expansion jack. And a hydraulic jack mounted on the movable base, and a support gripper movable in the circumferential direction of the existing tunnel by the hydraulic jack.

[0014] In an elec- tric device according to a fifth aspect of the present invention, a temporary support base is provided below the support frame.

According to a sixth aspect of the present invention, there is provided a tunnel excavator, comprising: a tubular body; a cutter head rotatably mounted on a front portion of the body; and cutter head driving means for driving and rotating the cutter head. A fuselage propulsion jack for propelling the fuselage by receiving excavation reaction from the inner wall surface of the existing tunnel,
A support frame extending rearward in the excavation direction from the body, a revolving ring rotatably supported by a plurality of revolving rollers on the support frame, revolving means for revolving the revolving ring, and mounted on the revolving ring. First support and support means capable of holding the support and moving in the radial direction of the existing tunnel, and being mounted on the swivel ring on both sides of the first support and support means so as to be movable in the circumferential direction, and supporting the support and supporting the existing tunnel. And a plurality of second support means movable in the radial direction.

[0016]

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 boring machine as a tunnel excavator equipped with an erector apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1 showing a rear gripper, and FIG. III of FIG. 1 representing the device
-III section, IV of FIG. 3 showing the support of the swivel ring in FIG.
FIG. 5 is a sectional view showing an assembling process of the support by the erector device.

In the tunnel boring machine (hereinafter referred to as TBM) 10 of the present embodiment, as shown in FIGS. 1 and 2, a bearing 12 is provided at the front of a cylindrical body 11.
Thereby, the cutter head 13 is rotatably mounted. A large number of roller cutters 14 for shearing and breaking rock are pivotally mounted on the front of the cutter head 13, and an opening 15 for taking in shear such as crushed rock fragments and earth and sand is formed. A ring gear 16 having internal teeth is integrally fixed to a rear portion of the cutter head 13 while a body 11 is fixed.
An electric or hydraulic cutter turning motor 17 is fixed to the motor.
8 meshes with the ring gear 16.

Accordingly, when the cutter rotating motor 17 is driven to rotate the drive gear 18, the ring gear 16 meshed with the drive gear 18 rotates, and the cutter head 13 integrated with the ring gear 16 is rotated. Can be excavated by shearing, and the generated shear can be taken into the inside of the body 11 through the opening 15.

A front end of a rectangular cylindrical support frame 19 is fixed to the rear of the body 11.
Numeral 9 extends rearward from the center of the existing tunnel.
A shoe jack 20 for maintaining the horizontal position of the shoe 9 is mounted, and a shoe 21 is connected to a lower end portion. A plurality of front grippers (not shown) are mounted on the fuselage 11, which is housed inside during excavation to make the fuselage 11 movable, and which is protruded outward during refilling to press against the wall surface of the existing tunnel, The position of the body 11 can be held.

Further, a rear gripper 2 is provided behind the body 11.
2 is provided movably back and forth with respect to the support frame 19. The rear gripper 22 is provided with gripper jacks 24 above and below a gripper box 23 movably supported on the outer peripheral portion of the support frame 19, and the gripper jack 24 is supported by the left and right support jacks 25 so as to be vertically movable. Also, a gripper shoe 26 is connected to the left and right ends. Therefore, gripper jack 2
4 makes the rear gripper 22 movable,
By extending the gripper jack 24 and projecting outward, the gripper jack 24 is pressed against the wall surface of the existing tunnel, and the position of the rear gripper 22 can be held.

The body 11 and the rear gripper 22
A plurality (four in this case) of thrust jacks 27 as a fuselage propulsion jack are provided between the gripper shoe 26 and the gripper shoe 26. The thrust jack 27 expands and contracts by supplying and discharging hydraulic pressure, and the front and rear ends of the thrust jack 27 are supported so as to be horizontally swingable. Therefore, by extending and contracting each drive rod of each thrust jack 27, the relative position between the body 11 and the rear gripper 22 can be changed. Further, by changing the respective operating strokes of the left and right thrust jacks 27, the body 11 having the cutter head 13 can be bent left and right to change the direction of excavation.

A hopper 29 for accumulating shear crushed by the roller cutter 14 is fixed to a chamber 28 formed by the cutter head 13 and the body 11. A belt conveyor 30 for carrying out the excavated waste is provided inside the support frame 19, a front end of the belt conveyor 30 is connected to a lower portion of the hopper 29, and a rear end of the belt conveyor 30 extends rearward of the tunnel. I have.

In the TBM of the present embodiment, the support can be assembled at a position close to the face.
An erector device 31 for assembling the support is provided at a rear portion of the body 11. That is, as shown in FIG. 1, FIG. 3, and FIG. 4, a plurality of turning rollers are provided on the front end of the support frame 19 connected to the rear portion of the body 11 by a plurality of support arms 32 on the outside. A turning ring 34 is rotatably supported by each turning roller 33. A ring gear 35 having internal teeth is fixed to the turning ring 34, while a hydraulic motor 37 as a turning means is attached to the support frame 19 by a bracket 36, and a driving gear 38 of the hydraulic motor 37 is attached to the ring gear 35. Are engaged. Therefore, the turning ring 34 can be turned by the hydraulic motor 37.

A first support mechanism 39 which can hold the support T and cannot move in the circumferential direction with respect to the swing ring 34 is mounted on the swivel ring 34, and the first support mechanism 39 is provided. The second and third support mechanisms 40 and 41 which can hold the support T on both sides of the support ring 34 and are slightly movable in the circumferential direction with respect to the swivel ring 34 are mounted. Note that the first support mechanism 39 and the second and third support mechanisms 40 and 41 are located at substantially 90-degree intervals.

In the first support and support mechanism 39, an expansion jack 42 is fixed to the outer peripheral portion of the revolving ring 34, and a support gripping portion 43 is connected to a tip end of a drive rod of the expansion jack 42. 42 allows the support T held by the support holding portion 43 to move in the radial direction of the existing tunnel. On the other hand, the second and third support mechanisms 4
Reference numerals 0 and 41 have substantially the same configuration.
The carts 44 and 45 have a plurality of guide rollers 4
6 and 47 movably supported by the hydraulic jack 4
The carriages 44 and 45 can be slightly moved by the carriages 8 and 49. The expansion jacks 50 and 51 are fixed to the carts 44 and 45, and the supporting grippers 52 and 53 are connected to the distal ends of the drive rods of the expansion jacks 50 and 51. The support T held by the support holding portions 52 and 53 can be moved in the radial direction of the existing tunnel.

As the holding method of the support T by the support holding portions 43, 52, 53, there is a method of sucking, holding by a hand, or connecting by a connecting pin. It is sufficient to use them properly depending on the situation. As shown in FIGS. 1 and 3, a hanging bracket 54 is fixed to a lower portion of the support frame 19 adjacent to the erector device 31, and the hanging bracket 54 temporarily holds three supports T. Temporary table 55
Are movably supported in the direction of excavation. Although not shown, a support supply truck is movably supported in the existing tunnel, and a hoist is movably supported. When the support T is carried into the existing tunnel by the support supply truck, the hoist Is the support T on this support supply trolley
Is moved forward, and is placed on the temporary support table 55.

Here, the TBM 10 of the above-described embodiment is used.
The tunnel excavation work and the support assembling work using the above will be described.

As shown in FIG. 1, each gripper jack 24 of the rear gripper 22 presses and holds the gripper shoe 26 against the inner wall surface of the existing tunnel. In this state, while the cutter head 13 is rotated by the cutter turning motor 17, each thrust jack 27 is extended to obtain the excavation reaction force from the rear gripper 22, and the body 11 is advanced, whereby each roller cutter of the cutter head 13 is moved. 14 crushes the ground in front and moves forward.

When the thrust jacks 27 extend a predetermined stroke in this way and the cutter head 13 digs a tunnel of a predetermined length, the shoe jack 20 extends downward, and the support frame 19 is supported by the shoes 21. At the same time, the position holding by the rear gripper 22 is released, while the body 11 is held on the excavated ground by a front gripper (not shown). Then, each thrust jack 27 is contracted, and the rear gripper 2
Pull 2 forward. In the same manner as described above, the rear gripper 22 is held on the inner wall surface of the existing tunnel, the shoe jack 20 is contracted to release the support of the support frame 19 by the shoe 21, and the cutter head 13 is driven to rotate. Each roller cutter 14 excavates the ground in front by extending the thrust jack 27 and moving the body 11 forward.

The shears excavated by the cutter head 13 are taken into the chamber 28, accumulated in the hopper 29, and discharged to the outside by the belt conveyor 30. Tunnel excavation work is continuously performed by repeating this work.

In the present embodiment, during the excavation or at the same time as the end of the excavation work, the erector device 31 temporarily assembles the support T in a ring shape, expands the temporary assembling support T, and extends the support T on the inner wall surface of the existing tunnel. Assemble closely. Hereinafter, this support T
Will be described.

As shown in FIG. 1, three supports T _A ,
T _B and T _C are carried into the existing tunnel by the support supply truck and the hoist T on the support supply truck is supported by the hoist.
Go _A, T _B, the T _C forward, placing the支保temporary stage 55. First, as shown in FIG. 3, the turning ring 34 is turned by the hydraulic motor 37 (see FIG. 1) to position the first support mechanism 39 below, and the expansion jack 42
The support gripping portion 43 grips the support T _A and then contracts, and lifts and holds the support T _A. Next, the swivel ring 34 is swiveled approximately 90 degrees clockwise in FIG.
The支保support mechanism 40 positioned below,支保gripper 52 extends the extension jack 50 is contracted from gripping the支保T _B, hold lift the支保T _B. In a state where remembering flexibility in positioning operation of the coupling between支保T _A and支保T _B, connecting the two with a bolt B. Finally, the third支保supporting mechanism 41 positioned below the revolving ring 34 in FIG. 3 turning almost 180 degrees in the counterclockwise direction,支保grip portion 53 by extending the extension jack 51 the支保T _C After being grasped and contracted, the support T _C is lifted and held. Then, the support T _A and the support T _C are connected by bolts B in a state where a degree of freedom is provided in the connection alignment work.

As described above, each support mechanism 39, 40, 4
The supports T are temporarily connected to each other by bolts B_A,
T_B, T_CIs held, the turning ring 34 is
Turning clockwise approximately 90 degrees, as shown in FIG.
The support T held by the first support mechanism 39_ALocated at the top
In this state, each of the expansion jacks 42, 50, 51 is extended.
Each support T_A, T_B, T_COn the inner wall of the existing tunnel.
Touch At this time, support T _AIs radial in the existing tunnel
Move to, but support T_B, T_CIs inside the existing tunnel
Move in the direction and support T_AMove upwards
Therefore, in the second and third support mechanisms 40 and 41, the hydraulic
Shrink the jacks 48, 49 and move the carts 44, 45 upward.
By moving slightly, the support T_B, T_CTo follow. So
After, support T _B, T_CAttach a support (not shown) between
Ke, support T_B, T_CTo form a circular support
And each bolt B is fastened and fixed.

As described above, in the TBM according to the present embodiment, the first support mechanism 39 and the second and third support mechanisms capable of holding the support T on the swivel ring 34 supported by the support frame 19 so as to be freely rotatable. With the mechanisms 40 and 41 attached, the second and third
By configuring the elector device 31 so that the support gripping portions 52 and 53 of the support support mechanisms 40 and 41 can be slightly moved in the circumferential direction, the support T divided into four is close to the face by the elector device 31 provided at the rear portion of the body 11. By performing temporary assembling work at the position during the excavation process and assembling at the predetermined position, tunnel workability can be improved, and a plurality of supports T can be sequentially connected to temporarily assemble easily in a short time. By improving the workability, the work time for excavating the tunnel and assembling the support can be greatly reduced.

FIG. 6 is a sectional view of a principal part of a tunnel boring machine equipped with an erector device according to a second embodiment of the present invention, FIG. 7 is a sectional view of the erector device taken along line VII-VII of FIG. 6, and FIGS. 2 shows a section illustrating the assembly process of the support by the device. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the erector device 61 mounted on the TBM of this embodiment, as shown in FIGS.
1 at the front end of the support frame 19 connected to the rear
A plurality of turning rollers 3 fixed to a plurality of support arms 32
The swing ring 34 is rotatably supported by 3 and can be swung by a hydraulic motor (not shown). A first support ring T can hold the support T
The support support mechanism 62 and two second and third support support mechanisms 6
3, 64 are mounted, each being disposed at substantially 90 degree intervals.

In the first support and support mechanism 62, an expansion jack 65 is fixed to the outer peripheral portion of the turning ring 34, and a mounting base 66 is fixed to the tip of a drive rod of the expansion jack 65, and a hydraulic pressure is applied to the mounting base 66. The support gripping portion 68 is attached by the jack 67, the support T gripped by the support gripping portion 68 by the expansion jack 65 can be moved in the radial direction of the existing tunnel, and the support T is moved by the hydraulic jack 67 in the circumferential direction of the existing tunnel. It can be moved slightly.

On the other hand, the second and third support mechanisms 63 and 64
Have substantially the same configuration, expansion jacks 69 and 70 are fixed to the outer peripheral portion of the swivel ring 34, respectively, and mounts 71 and 72 are fixed to the distal ends of the drive rods of the expansion jacks 69 and 70. The support grips 75, 76 are attached to the mounting tables 71, 72 by hydraulic jacks 73, 74, and the support T gripped by the support grips 75, 76 by the expansion jacks 69, 70 can be moved in the radial direction of the existing tunnel. In addition, the support T can be moved in the circumferential direction of the existing tunnel by the hydraulic jacks 73 and 74. In this case, the hydraulic jack 6 of the first support mechanism 62
7, the expansion and contraction strokes of the hydraulic jacks 73 and 74 of the second and third support support mechanisms 63 and 64 are set to be larger.

Therefore, as shown in FIG.
_{When A} , T _B , and T _C are carried into the existing tunnel and placed on the temporary support table 54, first, as shown in FIG. It is located below, the extension jack 69 is extended, and the support holding portion 75 grips the support T _A and then contracts to lift and support the support T _A. Next, the first支保support mechanism 62 positioned below the revolving ring 34 to pivot approximately 90 degrees in the counterclockwise direction in FIG. 7,支保grip portion 68 by extending the extension jack 65 the支保T _B gripped by shrinkage from holding lift the支保T _B. At this time, the position was adjusted by slight moving the支保grip portion 68 by a hydraulic jack 67,支保T _A and支保T _B
With the degree of freedom in the alignment work of the connection with the
Both are connected by bolts B. Finally, the swivel ring 34 is swiveled approximately 90 degrees in the counterclockwise direction in FIG.
Is extended and the support holding portion 76 grips the support T _C and then contracts to lift and support the support T _C. At this time, the position was adjusted by slight moving the支保gripper 76 by a hydraulic jack 74, while remembering the flexibility in positioning operation of the coupling between支保T _B and支保T _C, connecting the two with a bolt B .

As described above, each support mechanism 62, 63, 6
4 is a support T temporarily connected to each other by bolts B_A,
T_B, T_CIs held, the turning ring 34 is
Turning clockwise approximately 90 degrees, as shown in FIG.
The support T held by the first support mechanism 62_BLocated at the top
Then, in this state, as shown in FIG.
Extend 5,69,70 to each support T_A, T_B, T_CAlready
To the inner wall of the tunnel. At this time, support T_BIs
It moves in the existing tunnel in the radial direction._A, T_C
Moves radially in the existing tunnel and supports T_BTo
The second and second support mechanisms are pulled upward to move.
In 63 and 64, the hydraulic jacks 73 and 74 are contracted and supported.
By slightly moving the holding parts 75 and 76 upward,
T_A, T_CTo follow. Then, support T_A, T_CBetween
Attach a support (not shown) to the support T _A, T_CConcatenate with
To form a circular support and fasten each bolt B
Fix it. In the above description, the support T_A, T_B, T
_C, But the order is not limited.

As described above, in the TBM according to the present embodiment, the first support mechanism 62 and the second and third support mechanisms capable of holding the support T on the swivel ring 34 which is rotatably supported by the support frame 19. The mechanisms 63 and 64 are mounted, and the second,
The support holding portions 75 and 76 of the third support and support mechanisms 63 and 64 can be slightly moved in the circumferential direction.
By configuring the elector device 61 such that the support gripping portions 68, 75, 76 of 2, 63, 64 can be moved in the radial direction,
The support T divided into four parts can be temporarily assembled during the excavation process at a position close to the face by the erector device 61 provided at the rear part of the body 11, can be assembled at a predetermined position, and the tunnel workability can be improved. At the same time, the work of assembling the support can be facilitated, and the work time for excavating the tunnel and assembling the support can be greatly reduced.

In each of the above embodiments, the erector devices 31 and 61 use the supports T obtained by dividing one ring into four parts. However, the number of divided parts is not limited to four, and may be three or five. Further, the mounting position of the elector devices 31 and 61 is set to the front end of the support frame 19 connected to the rear part of the body 11, but may be the rear end of the support frame 19 positioned behind the rear gripper 22. Further, although the tunnel excavator is an open type TBM, a full shield type excavator may be used.

[0044]

As described above, according to the first aspect of the present invention, the swivel ring is swung by the plurality of swivel rollers on the support frame movably supported in the longitudinal direction of the existing tunnel. First support means which can be freely supported, and which can hold the support on the swivel ring and can move in the radial direction of the existing tunnel, and is mounted on both sides of the first support means so as to be movable in the circumferential direction to hold the support. And a plurality of second support means movable in the radial direction of the existing tunnel are provided, so that a plurality of supports can be sequentially connected and temporarily assembled easily in a short time, thereby improving workability. In addition, by performing the assembling work of the support near the face, the tunnel workability can be improved.

Further, according to the second aspect of the present invention, the first support supporting means includes an expansion jack fixed to the swivel ring, and a support holding portion movable in the radial direction of the existing tunnel by the expansion jack. And the structure can be simplified.

According to the third aspect of the present invention, there is provided an elector apparatus, wherein the second support means is a trolley movably supported by a swing ring, and a hydraulic jack for moving the trolley.
It consists of an expansion jack fixed to the bogie and a support gripping part that can be moved in the radial direction of the existing tunnel by this expansion jack, so that when the plurality of supports connected to each other are expanded, each support follows and is securely installed. It can adhere to the inner wall of the tunnel.

According to the elector device of the fourth aspect of the present invention, the second support means is an expansion jack fixed to the swivel ring, and a movable table movable in the radial direction of the existing tunnel by the expansion jack. Since the hydraulic jack mounted on the movable base and the support gripping portion movable in the circumferential direction of the existing tunnel by the hydraulic jack are configured, when the plurality of supports connected to each other are expanded, each support is made to follow. It can surely adhere to the inner wall surface of the existing tunnel.

According to the elector device of the fifth aspect of the present invention, since the temporary support base is provided at the lower portion of the support frame, the support grip can easily grip the support, thereby improving workability. it can.

Further, according to the tunnel excavator of the present invention, a rotatable cutter head is mounted on the front portion of the cylindrical body so that it can be driven and rotated by the cutter head driving means, and the body propulsion jack is provided. Makes it possible to propel the fuselage by receiving the excavation reaction force from the inner wall surface of the existing tunnel. A first support and support means which supports and supports the support on the revolving ring and is movable in the radial direction of the existing tunnel, and is mounted on both sides of the first support and support means so as to be movable in a circumferential direction to hold the support. Since a plurality of second support means are provided which are movable in the radial direction of the existing tunnel, the plurality of supports can be sequentially connected to each other for temporary assembly easily in a short time, thereby improving workability. It is possible, by performing the assembly operation of 支保 in close position from the working face, it is possible to improve the tunnel workability, it is possible to improve the workability of the tunnel construction work.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a tunnel boring machine as a tunnel excavator equipped with an erector device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1 showing a rear gripper.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1 showing the elector device.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3 showing a support portion of the swing ring.

FIG. 5 is a cross-sectional view illustrating an assembling process of the support by the elector device.

FIG. 6 is a sectional view of a main part of a tunnel boring machine equipped with an erector device according to a second embodiment of the present invention.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6 showing the elector device.

FIG. 8 is a cross-sectional view illustrating an assembling process of the support by the elector device.

FIG. 9 is a sectional view illustrating an assembling process of the support by the elector device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Tunnel boring machine (TBM) 11 Body 13 Cutter head 17 Cutter turning motor (Cutter head driving means) 19 Support frame 22 Rear gripper 24 Gripper jack 26 Gripper shoe 27 Thrust jack (Body propulsion jack) 30 Belt conveyor 31 Elector device 33 Rotating roller 34 swivel ring 37 hydraulic motor (swirl means) 39 first support and support mechanism 40 second support and support mechanism 41 third support and support mechanism 42 expansion jack 43 support holding part 44, 45 carriage 48, 49 hydraulic jack 50, 51 expansion jack 52 , 53 Supporting Holder 55 Supporting Temporary Placement Table 61 Elector Device 62 First Supporting Support Mechanism 63 Second Supporting Supporting Mechanism 64 Third Supporting Supporting Mechanism 65 Expansion Jack 68 Supporting Holder 69, 70 Expansion Jack 73, 7 Hydraulic jacks 75 and 76支保gripper _{T, T A, T B,} T C支保

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Samejima 2-1-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. No. 1 Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Kazuyuki Okamoto 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Inside the Mitsubishi Heavy Industries, Ltd.Kobe Shipyard (72) Inventor Shinichi Shimodera Tokyo Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku (72) Inventor Mitsuru Mitsu Yokoyama Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Akihiro Shigenaga Osaka Prefecture 1-15-15 Awaza, Nishi-ku, Osaka-shi Kashima Construction Co., Ltd. Kansai Branch F term (reference) 2D054 AD16 AD19 2D055 BA00 BB01 GB02

Claims (6)

[Claims] 1. An erector device for assembling a support carried into an existing tunnel, wherein the supporting frame is movably supported in a longitudinal direction of the existing tunnel, and is rotatably supported on the supporting frame by a plurality of revolving rollers. Swivel ring, swivel means for swiveling the swivel ring, first support and support means mounted on the swivel ring to hold a support and move in the radial direction of the existing tunnel, and the first support to the swivel ring An erector device comprising a plurality of second support means mounted on both sides of the support means so as to be movable in the circumferential direction and holding the support and movable in the radial direction of the existing tunnel. 2. The elector device according to claim 1, wherein
The first support supporting means has an expansion jack fixed to the swivel ring, and a support gripper movable by the expansion jack in a radial direction of an existing tunnel. 3. The elector device according to claim 1, wherein
A second carriage supporting means, a trolley movably supported by the swing ring, and a hydraulic jack for moving the trolley;
An erector device comprising: an expansion jack fixed to the carriage; and a support gripper movable by the expansion jack in a radial direction of an existing tunnel. 4. The erector device according to claim 1, wherein
The second support support means includes an expansion jack fixed to the swing ring, a movable table movable in a radial direction of an existing tunnel by the extended jack, a hydraulic jack mounted on the movable table, and the hydraulic jack. And a support gripper that is movable in the circumferential direction of the existing tunnel. 5. The erector device according to claim 1, wherein
An erector device, wherein a temporary support base is provided below the support frame. 6. A tubular body, a cutter head rotatably mounted on a front portion of the body, cutter head driving means for driving and rotating the cutter head, and an excavation reaction force from an inner wall surface of an existing tunnel. A fuselage propulsion jack for receiving and propelling the fuselage, a support frame extending rearward in the excavation direction from the fuselage, a swing ring rotatably supported on the support frame by a plurality of swing rollers, and the swing ring. Pivoting means for pivoting, first supporting and supporting means mounted on the rotating ring to hold the support and move in the radial direction of the existing tunnel, and circumferentially moving the rotating ring on both sides of the first supporting and supporting means. A tunnel excavator, comprising: a plurality of second support means, which are freely mounted to hold a support and are movable in a radial direction of an existing tunnel.