JP2898964B1 - Underground junction type shield machine - Google Patents

Abstract

[PROBLEMS] In a conventional shield excavator capable of underground bonding,
Usually, both shield excavators are concentrically joined underground, and it is difficult to join both shield excavators in a desired positional relationship without being concentric. SOLUTION: In a first shield excavator 1, a cutter head 2 is divided into a divided cutter head 10 and a main body side cutter head 11, and the divided cutter head 1 is divided.
0 and the main body side cutter head 11 with the crank mechanisms 40, 6
The second shield excavation is performed by providing the divided frame 12 and the main body side frame 13 which are supported via the reference numerals 0 and 61, respectively, and moving the divided cutter head 10 and the divided frame 12 backward with respect to the main body side frame 13. The two shield excavators are joined underground by fitting the front end of the excavator 100 with almost no gap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground shield type excavator for joining first and second shield excavators underground, and more particularly, to a first shield excavator in which a cutter head is connected via a plurality of crank mechanisms. And those that are driven to swing.

[0002]

2. Description of the Related Art In recent years, tunnels for water supply and sewerage, common trenches, and the like are often excavated by a shield method, in which case the construction period is limited, and the distance that can be excavated by one shield excavator is limited. For this reason, usually, a plurality of shafts are provided, and a section between the shafts is often excavated by sharing with each shield machine. The tunnel may have the same diameter or the diameter may change along the way.

In the case of a tunnel formed underground in an urban area,
Since the structure is often congested on the underground and above ground, it is not possible to form a shaft. Therefore, two shield excavators of the same diameter or different diameters are excavated from the separation point in the phase approaching direction, and finally 2
Various techniques have been proposed for joining the front ends of two shield excavators underground.

For example, in a shield excavator capable of underground connection described in Japanese Patent Application Laid-Open No. H8-4476, a first shield excavator has a cutter head, a trunk structure, and an inner part capable of moving back and forth inside a trunk structure. It has a frame main body that is fitted and rotatably supports the cutter head, an annular tube seal provided on the inner surface of the distal end portion of the trunk structure, and the like.

At the time of underground joining of the two shield excavators, the diameter of the cutter head of the first shield excavator is made smaller than the inner diameter of the trunk structure, and the cutter head and the body frame are retracted into the trunk structure. By doing so, the distal end portion of the first shield excavator can be concentrically fitted and joined to the distal end portion of the second shield excavator, and then water can be stopped between both shield excavators by a tube seal. It has become.

In addition, as shield excavators which can be joined underground, a first shield excavator has a penetration ring for underground joining and an extrusion drive mechanism, and a second shield excavator has an elastic receiving ring and the like. Then, the penetration ring is extruded and driven from the first shield excavator by the extrusion drive mechanism, the front end thereof is received by the elastic receiving ring of the second shield excavator and water is stopped, and both shield excavators are concentrically underground. The penetration ring type shield excavator which joins is also used for practical use.

On the other hand, an eccentric multi-axis shield excavator in which a cutter head is supported by a plurality of crank mechanisms and the cutter head is oscillated by a swing drive mechanism via a crank mechanism has been put to practical use. In this eccentric multi-axis shield machine, a tunnel having substantially the same shape as the cutter head can be formed, and by using cutter heads of various shapes, various excavation cross sections (circular cross section, rectangular cross section, elliptical cross section, etc.) It is possible to excavate tunnels.

[0008] By the way, there is a demand to join a large-diameter tunnel and a small-diameter tunnel excavated by both shield excavators in accordance with the use of the tunnel such that a part of the outer peripheral portion thereof has almost no step. is there. For this purpose, it is only necessary that the two shield excavators can be joined in a desired positional relationship, and this is not impossible if the technology disclosed in “Construction machinery '97 .8.” Is used.

That is, the first shield excavator includes a parent shield excavator, a rotary drum eccentrically provided in the parent shield excavator, and a small shield excavator provided eccentrically in the rotary drum. When excavating, with the parent shield excavator and small shield excavator concentrically arranged,
The three cutter heads located in front of the parent shield excavator, the rotating drum and the small shield excavator are integrally rotated.

At the time of underground joining, the opening formed in the first shield excavator is formed by rotating the rotary drum, moving the small shield excavator in the radial direction, and retracting the small shield excavator. , The front end of a second shield excavator having substantially the same shape and size as the small shield excavator can be inserted into the shield excavator so that both shield excavators can be joined underground, or a penetrating ring can be inserted into one of the first and second shield excavators. When the elastic receiving ring is provided on the other side, it is also possible to eccentrically join the two shield excavators underground by the penetrating ring method.

[0011]

In a conventional shield excavator capable of underground joining, both shield excavating machines are generally concentrically joined underground. It is difficult to join in the positional relationship.

If the technique disclosed in the above-mentioned "Construction machinery '97 .8." Is used, it is not impossible to join the shield excavators in a desired positional relationship, but the rotary drum and the rotary drum are rotatably supported. It is necessary to provide a drum support mechanism, a drum drive mechanism that drives the rotary drum to rotate, etc.
The structure becomes complicated and the production cost becomes high.

On the other hand, in the eccentric multi-axis shield machine,
It is possible to excavate tunnels of various excavation cross sections (circular cross section, rectangular cross section, elliptical cross section, etc.), but first and second excavation of tunnels of the same excavation cross section (rectangular cross section, elliptical cross section, etc.) other than circular cross section The technology of underground joining of the two shield excavators and the first and second shield excavators for excavating tunnels having different excavation cross sections (a circular cross section, a rectangular cross section, etc.) has not been put to practical use.

An object of the present invention is to make it possible to easily join tunnels having various cross-sectional states in a desired positional relationship in an underground junction type shield machine.

[0015]

According to a first aspect of the present invention, there is provided an underground shield type shield machine comprising first and second shield machines.
In an underground junction type shield excavator in which both shield excavators are excavated in a phase approaching direction and joined underground, the first shield excavator includes a cutter head, a body member, and a body member. An internal frame member, wherein the cutter head has a part of the divided cutter head and the remaining main body side cutter head, and the frame member corresponds to the divided frame and the main body side cutter head corresponding to the divided cutter head. A plurality of first crank mechanisms for swingably supporting the split cutter head on the split frame, and a swing drive for swinging the split cutter head via the first crank mechanism. Means for synchronously oscillating the main body side cutter head with the oscillating movement of the divided cutter head; In order to fit the front end portion of the machine with substantially no gap, a split frame retreat moving means for retreating the split cutter head and the split frame rearward with respect to the main body side frame is provided. is there.

At the time of the shield excavation of the first shield excavator, the divided cutter head supported on the divided frame by the plurality of first crank mechanisms is moved to the first by the swing driving means.
While being driven to swing through a crank mechanism, the main body side cutter head is driven to swing in synchronization with the swinging motion of the divided cutter head by a synchronous swinging means, and is slightly larger than the cutter head and has substantially the same shape as the cutter head. A first tunnel of the same shape is excavated.

After the first shield excavator reaches a predetermined underground joint and the shield excavation is completed, the divided cutter head and the divided frame are retracted rearward with respect to the main body side frame by the divided frame retreating moving means. By joining the two shield excavators, the front end portion of the second shield excavator is fitted into the portion where the divided frame of the first shield excavator was located before retreating, with almost no gap therebetween by moving in. Can be.

In this underground shield type excavator, the divided cutter head and the divided frame may be arranged in the first shield excavator so that the first and second shield excavators can be connected in a desired positional relationship. Therefore, the connection relationship between the first and second shield excavators can be freely set.

Further, by using cutter heads of various shapes in the first shield machine, it is possible to excavate a tunnel of a substantially same shape slightly larger than the cutter head. Also, as the second shield machine,
A tunnel capable of forming tunnels of various excavation cross sections can be applied. In this case, tunnels of various excavation cross sections (circular cross section, rectangular cross section, elliptical cross section, etc.) having different sizes, and excavations having different shapes are also applicable. It is possible to join a tunnel having a cross section (a circular cross section and a rectangular cross section, etc.) underground.

Further, in the first shield excavator, the divided cutter head is oscillated through a plurality of first crank mechanisms by a smaller driving torque than a conventional shield excavator which rotationally drives a spindle of the cutter head. Because you can
This is advantageous in terms of the manufacturing cost of the oscillating drive means, and the frequency of use (digging load) of a large number of bits attached to the front portion of the cutter head is substantially uniform, so that their wear can be prevented.

According to a second aspect of the present invention, there is provided an underground junction type shield machine.
The invention according to claim 1, further comprising a water stopping mechanism for stopping water between the two shield excavators in a state where a front end portion of the second shield excavator is fitted into the first shield excavator. It is. Therefore, after the underground joining of the two shield excavators, the water stopping mechanism makes it possible to easily and reliably stop the water between the two shield excavators, thereby preventing the inflow of muddy water or the like from between the two shield excavators.

According to a third aspect of the present invention, there is provided an underground shield type shield machine.
An underground joint type shield excavator comprising first and second shield excavators, wherein both shield excavators are excavated in a phase approaching direction and are joined underground, wherein the first shield excavator comprises a cutter A head member, a body member, and a frame member inside the body member, wherein the cutter head has a partly divided cutter head and the remaining main body side cutter head, and the frame member is a divided cutter head. A plurality of first crank mechanisms having a corresponding divided frame and a main body side frame corresponding to the main body side cutter head, and supporting the divided cutter head on the divided frame in a swingable manner;
A swing drive means for swing drive via a crank mechanism; and a synchronous swing means for synchronizing the main body side cutter head with the swing motion of the divided cutter head, wherein one of the first and second shield excavators is provided. Provided with a penetration ring for underground joining of substantially the same shape and size as the split frame, and an extrusion drive mechanism for pushing and driving the penetration ring forward,
The other of the first and second shield machines is provided with an elastic receiving ring for receiving the front end of the penetrating ring and stopping water.

In this underground junction type shield excavator, one of the first and second shield excavators is approximately the same as the divided frame by an extrusion drive mechanism with the first and second shield excavators approaching and facing each other. When a penetration ring for underground joining of the same shape and size is extruded and driven forward, the front end thereof is moved to the first and first positions.
The second shield excavator can be received by the other elastic receiving ring of the second shield excavator to stop the water, and the two shield excavators can be joined underground. Other functions are substantially the same as those of the first aspect.

According to a fourth aspect of the present invention, there is provided an underground shield type shield machine.
The invention according to any one of claims 1 to 3, wherein the first shield excavator is provided with a retracting means for retracting at least a part of the outer peripheral portion of the divided cutter head toward the central portion of the divided cutter head. Is what you do.

In the first shield machine, when the split cutter head is retracted by pulling at least a part of the outer peripheral portion of the split cutter head toward the center of the split frame by the pull-in means, The outer peripheral portion can be reliably prevented from interfering with the main body side frame, and when joining both shield excavators by the penetrating ring, the penetrating ring extruded from one of the first and second shield excavators is divided. Interference with the cutter head can be prevented.

According to a fifth aspect of the present invention, there is provided an underground junction type shield machine.
The invention according to any one of claims 1 to 4, wherein the first shield excavator supports a main body side cutter head on a main body side frame so as to swing freely, and has a plurality of first and second crank mechanisms having the same crank radius as the first crank mechanism. A two-crank mechanism is provided.

The main body side cutter head is swingably supported on the main body side frame by a plurality of second crank mechanisms having the same crank radius as the first crank mechanism. Synchronization with the swinging motion of the split cutter head can be easily and reliably synchronized.

According to a sixth aspect of the present invention, there is provided an underground junction type shield machine.
According to a fifth aspect of the present invention, the synchronous oscillating means includes a main body side oscillating drive means for oscillatingly driving the main body side cutter head via a second crank mechanism. In particular, by providing the main body side swing drive means,
Even when the main body-side cutter head is large, the main body-side cutter head can be swingably driven in synchronization with the swinging motion of the divided cutter head.

According to a seventh aspect of the present invention, there is provided an underground junction type shield machine.
The invention according to any one of claims 1 to 6, wherein the synchronous oscillating means includes a connecting means for mechanically connecting the divided cutter head and the main body side cutter head.

By mechanically connecting the divided cutter head and the main body side cutter head by the connecting means, the main body side cutter head can be easily and reliably synchronized with the swinging motion of the divided cutter head. At the time of underground joining of the shield excavators, the mechanical connection between the divided cutter head and the main body side cutter head is released.

According to the eighth aspect of the present invention, there is provided an underground junction type shield machine.
In the invention of claim 5 or 6, the main body-side cutter head is composed of a plurality of main body-side cutter head divided bodies,
Each of the main body side cutter head divided bodies is supported by a plurality of second crank mechanisms.

Therefore, by independently swinging the plurality of main body-side cutter head divided bodies via the plurality of second crank mechanisms, the plurality of main body-side cutter head divided bodies can be separated from each other. Since the front side can be completely opened, when the second shield excavator is fitted into the first shield excavator, it is possible to reliably prevent the second shield excavator from interfering with the main body side cutter head, and When the two shield excavators are joined by fitting, the penetration ring extruded from one of the first and second shield excavators can reliably be prevented from interfering with the main body side cutter head.

According to a ninth aspect of the present invention, there is provided an underground shield type shield machine.
The invention according to claim 8 is characterized in that each of the main body side cutter head divided bodies is independently driven to swing by the main body side swing drive means. By the main body side swing drive means, the plurality of main body side cutter head divided bodies can be independently driven to swing and reliably separated.

[0034]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the first and second
This is an example of a case where the present invention is applied to an underground joint type shield excavator that includes a shield excavator and that joins both shield excavators underground. However, in each of the first and second shield excavators, the front, rear, left and right in the excavation direction will be described as front, rear, left and right.

First, the first shield machine 1 will be described. As shown in FIGS. 1 to 5, the first shield excavator 1 includes a cutter head 2, a trunk member 3, a frame member 4 located at a distal end portion inside the trunk member 3, a screw conveyor 5, , A shield jack 6, an erector device 7, a perfect circle holding device 8, a rear work deck 9, and the like.

The cutter head 2 has a partly divided cutter head 10 and a remaining main body side cutter head 11.
The frame member 4 includes a divided frame 12 corresponding to the divided cutter head 10 and a main body side cutter head 11.
And the main body side cutter head 11 is composed of a pair of left and right symmetric main body side cutter head divided bodies 15 and 16.

The outer shape of the divided cutter head 10 is circular,
The outer shape of the main body side cutter head 11 is configured in a crescent shape surrounding and bending the upper part of the divided cutter head 10, and the divided cutter head 10 and the main body side cutter head 11 are arranged in a predetermined positional relationship (see FIG. 2). 2 has a substantially circular outer shape.

At the time of the shield excavation of the first shield excavator 1, the divided cutter head 10 and the main body side cutter head 1
1 includes a plurality of connecting members 17 and 18 in the predetermined positional relationship.
(Corresponding to a connecting means), and the second
Prior to underground joining with the shield machine 100, the connection between the divided cutter head 10 and the main body side cutter head 11 by the plurality of connecting members 17, 18 is released.

Here, as shown in FIG. 3, for example, each of the connecting members 17 and 18 is composed of a hydraulic cylinder, and the cylinder body 17a of the hydraulic cylinder (connecting member) 17 is supported by the main body side cutter head 11 while being guided. , The piston rod 17b is connected to the main body side cutter head 11,
When the shield excavation of the first shield excavator 1 is performed, the engaging portion 17c at the tip of the cylinder body 17a is engaged with the concave portion 17d formed in the divided cutter head 10.

Further, the cylinder body 18a of the hydraulic cylinder (connecting member) 18 is movably guided and supported by the divided cutter head 10, and the piston rod 18b is connected to the divided cutter head 10, so that the first shield excavator 1 At the time of shield excavation, the engaging portion 18c at the tip of the cylinder main body 18a is engaged with the concave portion 18d formed in the main body side cutter head 11, and the divided cutter head 1
0 and the main body side cutter head 11 are integrally connected.

By driving the piston rods 17b and 18b to retract, the cylinder bodies 17a and 18a are connected to the cutter head 1 connected to the piston rods 17b and 18b.
It moves to the 0, 11 side, the engagement parts 17c, 18c of the cylinder main bodies 17a, 18a are disengaged from the concave parts 17d, 18d, and the connection between the divided cutter head 10 and the main body side cutter head 11 is released. The second shield machine 100
Most of the cylinder bodies 17a and 18a retreat into the cutter heads 10 and 11 at the time of underground joining with the cutter heads. Although not shown, a hydraulic supply system including a swivel joint for supplying hydraulic pressure to the hydraulic cylinders 17 and 18 is provided.

Also, the main body side cutter head divided body 15,
A hydraulic cylinder 19 having a twist function for twisting the rod and a stroke function for moving the rod forward and backward is provided in order to connect the connection 16 in a releasable manner. The cylinder main body 19a of the hydraulic cylinder 19 is fixed to the main body-side cutter head divided body 15, and an oval-shaped clamp portion 19c is provided at the distal end of the piston rod 19b of the hydraulic cylinder 19. An oval hole 19d is formed in the frame.

When the piston rod 19b is inserted into the oval hole 19d and the piston rod 19b is driven to retract while the oval-shaped clamp portion 19c is rotated by 90 degrees with respect to the oval hole 19d, the clamp portion 19c is moved. The main body side cutter head divided bodies 15 and 16 are connected by being pressed against the frame of the main body side cutter head divided body 16.

The oval shaped clamp 19c is inserted into the oval hole 19d.
By driving the piston rod 19b to retreat in the same direction as above, the clamp portion 19c moves to the main body side cutter head divided body 15 side, and the connection between the main body side cutter head divided bodies 15 and 16 is released. Although not shown, a hydraulic supply system including a swivel joint for supplying hydraulic pressure to the hydraulic cylinder 19 is provided.

The divided cutter head 10 has a main body 20 occupying a large part thereof, and a movable part located at the upper end of the outer peripheral part of the divided cutter head 10 and connected to the main body 20 via a pair of frames 22. And a part 21. A hydraulic cylinder 23 (corresponding to a retracting means) is incorporated in each frame 22. When the divided cutter head 10 retreats (moves backward), the divided cutter head 10 does not interfere with the main body side frame 13 at the swing upper limit position. As described above, the movable portion 21 is driven downward by these hydraulic cylinders 23 and is drawn toward the center of the divided cutter head 10.

A body-side frame 13 including a partition wall 25 is fixed to the inside of the body member 3 slightly behind the front end. The main body side frame 13 has a circular opening 26 eccentric downwardly with respect to the body member 3.
A sub-body member 27 is fitted in the rear body 6 so as to be movable rearward, and a partition wall 28 is provided slightly behind the front end inside the sub-body member 27.
Is fixed. The space between the main body side frame 13 and the sub-body member 27 is stopped by a water stopping mechanism (not shown).

During the shield excavation of the first shield excavator 1, the partition walls 25 and 28 are located at the same front and rear positions.
A portion surrounded by the trunk member 3 on the front side of the partition walls 25 and 28 is formed in a chamber 29 for collecting excavated soil excavated by the cutter head 2. The screw conveyor 5 passes through the inside of the sub-body member 27 and is arranged in an inclined manner so that the front end thereof reaches the lower end of the chamber 29.

The main body side frame 1 is provided on the inner surface of the body member 3.
An annular frame 30 is fixed to the rear side of the frame 3, and a plurality of shield jacks 6 are fixed to the annular frame 30 in a penetrating manner, and are arranged rearward at appropriate circumferential intervals. A spreader 6a is connected to the rear end of the piston rod of each shield jack 6, and the shield jack 6 pushes the front end of the segment S backward through the spreader 6a to generate a thrust for excavation.

The erector device 7 includes the cutter head 2
Is a general apparatus for constructing a segment S on the inner surface of a tunnel T excavated by a movable frame 33 rotatably supported by a plurality of rollers 32 respectively attached to an annular frame 30 via a bracket 31. It has a drive motor (not shown) for driving the frame 33 to rotate, an erector main body 34 attached to the movable frame 33 and the like.

After constructing a segment S for one ring by the erector device 7, the perfect circle holding device 8 draws a perfect circle of the segment S for one ring for a predetermined period (at least the next segment for one ring is constructed). This device is a general device for holding the unit, and has a segment support member 35 supported by the rear work deck 9 and the like.

The first shield machine 1 has a plurality (for example, five sets) of first and second divided cutter heads 10 which are swingably supported on the divided frame 12 in a plane perpendicular to the axis of the tunnel. Crank mechanisms 40, 45, a plurality of swing drive mechanisms 50 for swingingly driving the divided cutter head 10 via the plurality of first crank mechanisms 40, and each of the main body side cutter head divided bodies 15, 16 of the main body side cutter head 11. (For example, three sets) of a plurality of (for example, three sets) supporting the main body side frame 13 swingably in a plane orthogonal to the axis of the tunnel.
Crank mechanisms 60 and 61 are provided.

Further, a plurality of main body side swing drive mechanisms 70 for driving the left main body side cutter head divided body 15 through a plurality of second crank mechanisms 60 and a plurality of right main body side cutter head divided bodies 16 are provided. A plurality of main body side swing drive mechanisms 71 which are driven to swing via the second crank mechanism 61 are provided. The first and second crank mechanisms 40 and 45 have the same crank radius.

Each first crank mechanism 40 includes a crank member 4
1, the front end of the crank member 41 is rotatably connected to the frame intersection 10a of the split cutter head 10, and the rear ends of the crank member 41 are bearings 42, 43.
And is rotatably supported by the divided frame 12 via the. The first crank mechanism 45 has a crank member 46,
The front end of the crank member 46 is the divided cutter head 1
The rear end portion of the crank member 46 is rotatably supported by the divided frame 12.

Each swing drive mechanism 50 is mounted on the divided frame 12.
A drive gear 52 fixed to the output shaft of the hydraulic motor 51.
Meshes with a gear member 53 fixed to the crank member 41 between the bearings 42 and 43, and synchronously drives the hydraulic motors 51 of the plurality of swing drive mechanisms 50, so that the divided cutter head 10 The swing driving is performed via the crank mechanism 40.

Each of the second crank mechanisms 60 and 61 and each of the main body side swing drive mechanisms 70 and 71 have the same structure as the first crank 40 and the swing drive mechanism 50. Omitted. Here, the split cutter head 10
And the main body side cutter head 11 are connected to a plurality of connecting members 17, 1.
8, the rotation angles (postures) of the plurality of crank members 41, 46 of the first crank mechanisms 40, 45 and the second crank mechanisms 60, 61 are the same.
Note that the plurality of body-side swing drive mechanisms 70, 71 and the plurality of connecting members 17, 18 correspond to synchronous swing means.

The front end of the body member 103 of the second shield excavator 100 is fitted into the front end of the circular opening 26 of the second shield excavator 100 at the front end of the circular opening 26 of the main body side frame 13. An annular water stopping mechanism 80 for stopping water between 1,100 is provided.

As shown in FIGS. 6 and 7, this water stopping mechanism 80 is an annular elastic membrane member incorporated in an annular recess 81 formed in the circular opening 26 of the main body side frame 13 from the inner surface side. An annular seal body 83 is provided in which the seal member 82 and the plurality of seal members 84 are arranged with a gap in the circumferential direction. Each seal member 84 is made of a steel plate piece, and the annular seal body 83 is formed by covering a plurality of seal members 84 arranged in the circumferential direction with a covering made of rubber or synthetic resin.

With the annular seal member 83 disposed inside the annular elastic membrane member 82, the front end of the annular seal member 83 is fixed to the front end of the bottom of the annular concave portion 81 by a fixing bracket 85, and the annular elastic membrane member 82 The rear end of the annular seal 83 is fixed to the bottom rear end of the annular recess 81 by a fixing bracket 86,
The space between the annular seal 83 and the bottom of the annular recess 81 is in a sealed state.

The rear end of the fixing bracket 85 is formed in a tapered portion 85a, and when the water stopping mechanism 80 is not operated (see FIG. 6).
The front end of the annular seal body 83 is locked to the tapered portion 85a. A pressurized water supply pipe 87 is provided inside the main body side frame 13, and the front end of the body member 103 of the second shield excavator 100 is fitted into the front end of the circular opening 26. When pressurized water is supplied into the annular elastic membrane member 82, the annular elastic membrane member 82 expands inward, and the expansion force causes the front end portion of the annular seal body 83 to float inward. Member 103
To stop the water between the body member 103 and the body-side frame 13 (see FIG. 7).

In order to fit the front end portion of the second shield excavator 100 having substantially the same diameter as the divided frame 12 into the first shield excavator 1 with substantially no gap, the sub cutter 27 and the divided cutter head 10 are divided. A divided frame retreat moving mechanism 90 for retreating the frame 12 and the main body side frame 13 backward is provided.

The split frame retreating and moving mechanism 90 has a plurality of hydraulic jacks 91 (see FIGS. 11 and 12) mounted when the shield excavators 1 and 100 are joined underground. In this case, for example, the shield main body of each hydraulic jack 91 is fixed to the main body side frame 13, and the distal end of the piston rod is connected to the sub trunk member 27. Then, the hydraulic jacks 91 are operated, and the divided cutter head 10 and the divided frame 12 are driven to move backward with respect to the main body side frame 13 together with the sub trunk member 27.

When the shield excavation is performed by the first shield excavator 1, the swing drive mechanism 50 and the main body are connected with the divided cutter head 10 and the main body side cutter head 11 being connected by a plurality of connecting members 17 and 18. Side swing drive mechanism 7
When the cutter heads 0 and 71 are operated synchronously, the divided cutter head 10 and the main body side cutter head 11 (cutter head 2) are swingably driven integrally while maintaining their postures, and a first tunnel having substantially the same shape as the cutter head 2 is formed. T is excavated, and the segment S is assembled to the tunnel T by the erector device 7.

Next, the second shield machine 100 will be described. As shown in FIGS. 8 and 9, the second shield machine
100 is a cutter head 102, a trunk member 103, a trunk member 103
A frame member 104 including a partition wall 104a fixed to a front end portion of the inside, a screw conveyor 105, a plurality of shield jacks 106, an erector device 107, a perfect circle holding device 108, a rear work deck 109 and the like are provided.

The cutter head 102 has a main part 110 and a movable part 111 located at the upper end of the outer peripheral part of the cutter head 102 and connected to the main part 110 via a pair of frames 112. Have. A hydraulic cylinder 113 is incorporated in each frame 112, and the cutter head 102 is
When the cutter head 102 is fitted into the circular opening 26 of the shield machine 1, the movable unit 111 is driven downward by a pair of hydraulic cylinders 113 so that the cutter head 102 does not interfere with the main frame 13 of the first shield machine 1. It is configured to be drawn into the center of the cutter head 102.

A plurality of cutter heads 102 (for example, 5
A pair of crank mechanisms 120, 121 are swingably supported in a plane orthogonal to the axis of the tunnel, and are swing-driven by a plurality of swing drive mechanisms 122 via the plurality of crank mechanisms 120. Note that the crank mechanisms 120 and 121 and the swing drive mechanism 122 are the same as the first crank mechanisms 40 and 45 and the swing drive mechanism 50 of the first shield excavator 1, and a description thereof will be omitted.

The erector device 107, the perfect circle holding device 108, the rear work deck 109, etc. are smaller than the erector device 7, the perfect circle holding device 8, the rear work deck 9, etc. of the first shield machine 1, Since the structure is basically the same, the description is omitted. In addition, the trunk member 103 is provided on the front side of the partition wall 104a.
A chamber 125 for collecting excavated soil excavated by the cutter head 102 is formed in a portion surrounded by the cutter head 102, and the screw conveyor 105 is arranged in an inclined manner so that a tip end thereof reaches a lower end portion of the chamber 125. I have.

When the shield excavation is performed by the second shield excavator 100, the cutter head 102 is driven by the swing driving mechanism.
The second tunnel Ta having the same shape as that of the cutter head 102 is excavated by the rocking drive of the cutter head 102, and the segment Sa is assembled to the tunnel Ta by the erector device 107.

Next, the first and second shield machine 1
Fig. 10 shows the underground joining process for joining 100 underground.
This will be described with reference to FIG.

First, in the first step, as shown in FIG. 10, the first shield excavating machine 1 is stopped in a state where the shield excavating machine 1 is excavated to a predetermined underground joint point and stopped. Spreader 6 of S and shield jack 6
A backing prevention work is performed by interposing a reaction force receiver 95 between the parts (a) and (a), and a part (lower end part) of the shield jack 6, the elector device 7, the perfect circle holding device 8, the rear work deck 9, and the like are dismantled and removed.

Next, in the second step, as shown in FIG. 11, the divided cutter head 10 and the main body side cutter head 1
The connection by the one plurality of connecting members 17 and 18 is released.
Further, the cutter head 10 is divided by the hydraulic cylinder 23.
Of the divided cutter head 10 is pulled down toward the center portion side of the divided cutter head 10 so that the divided cutter head 10 at the swing upper limit position does not protrude outside the sub trunk member 27 in front view. A plurality of hydraulic jacks 91 of the divided frame retreat moving mechanism 90 are mounted.

Next, in the third step, as shown in FIG. 12, the plurality of hydraulic jacks 91 of the divided frame retreating moving mechanism 90 allow the divided cutter head 10 and the divided frame 12 to be moved together with the auxiliary body member 27. The main body side frame 13 is moved backward by a predetermined stroke.

Next, in the fourth step, a pair of the main body side cutter head divided bodies 15 and 1 of the main body side cutter head 11 are formed.
When the hydraulic cylinder 19 is connected, the hydraulic cylinder 19 is operated to release the connection, and then, as shown in FIG. Move the crank member 41 approximately 4 clockwise in front view.
Rotate 5 degrees and a plurality of main body side swing drive mechanisms 7
By (1), the crank members 41 of the plurality of first crank mechanisms 61 are rotated counterclockwise by about 45 degrees in a front view to separate the pair of main body side cutter head divided bodies 15 and 16 into left and right.

Next, in the fifth step, the second shield excavator 100 is shield-excavated to a predetermined underground junction, and
In a state where the movable section 111 of the cutter head 102 is driven downward by the hydraulic cylinder 113 in a state of being aligned so as to be concentric with the sub-body member 27 of the shield machine 1, the movable section 111 is pulled toward the center of the frame cutter head 102, and shakes. The cutter head 102 at the upper movement limit position is prevented from projecting radially outward from the trunk member 103 when viewed from the front.

Next, in the sixth step, as shown in FIG. 13, the second shield machine 100 is advanced, and the front end portion of the body member 103 is moved to the front end of the circular opening 26 of the first shield machine 1. The two shield excavators 1,100 are joined underground.

Next, in the seventh step, as shown in FIG. 7, the water stopping mechanism 80 is operated to cause the main body side frame 13 of the first shield machine 1 and the body member 103 of the second shield machine 100 to operate. Stop the water between Then, shield jack 6,1
06, Screw conveyor 5,105, Electa unit 107
After dismantling and removing unnecessary unnecessary equipment, secondary lining work is performed on the inner surface of the underground joint of both shield excavators 1,100.

In this embodiment, as the second shield excavator, the cutter head 102 is connected to the crank mechanism 120.
Although the second shield excavator 100 that swings and drives through this is applied, the present invention is not limited to this type of swing drive type shield excavator, and an existing shield excavator that rotationally drives a cutter head can be applied.

According to this underground junction type shield machine,
In the first shield machine 1, the divided cutter head 10 and the divided frame 12 can be arranged so that the first and second shield machine 1 and 100 can be connected in a desired positional relationship. The connection between the two shield excavators 1,100 can be set freely.

In the first shield excavator 1, the plurality of crank mechanisms 40, 40 are driven by a smaller driving torque than a shield excavator that rotationally drives the spindle of the cutter head.
The swing drive mechanism 50 and the body-side swing drive mechanisms 70 and 71 allow the cutter head 2 to swing and drive via the 60 and 61.
And the frequency of use (digging load) of a large number of bits attached to the front portion of the cutter head 2 becomes substantially uniform, so that their wear can be prevented.

Since the water stopping mechanism 80 is provided, water can be easily and reliably stopped between the two shield excavators 1 and 100 in a state where the front end of the second shield excavator 100 is fitted into the first shield excavator 1. In addition, inflow of muddy water between the shield excavators 1 and 100 can be reliably prevented.

Since the hydraulic cylinder 23 for pulling at least a part of the movable portion 21 of the outer peripheral portion of the divided cutter head 10 toward the central portion of the divided cutter head 10 is provided, when the divided cutter head 10 is retracted, The outer peripheral portion of the head 10 can be prevented from interfering with the main body side frame 13.

A plurality of first crank mechanisms 40 and 45 and a plurality of second crank mechanisms 60 and 61 for swingably supporting the main body side cutter head 11 on the main body side frame 13.
Is provided, it is possible to easily and reliably synchronize the main body side cutter head 11 with the swinging motion of the divided cutter head 10.

Since the main body-side swing drive mechanisms 70 and 71 for driving the main body-side cutter head 11 through the second crank mechanisms 60 and 61 are provided together with the plurality of swing drive mechanisms 50, especially the main body-side Even if the cutter head 11 is large, the main body side cutter head 11 can be driven to swing in synchronization with the swinging motion of the divided cutter head 10 without fail.

Since the connecting members 17 and 18 for mechanically connecting the divided cutter head 10 and the main body side cutter head 11 are provided, the main body side cutter head 11 is more easily and reliably synchronized with the swinging motion of the divided cutter head 10. Can be done.

The main body-side cutter head 11 is constituted by a pair of symmetric main body-side cutter head divided bodies 15 and 16, and each main body-side cutter head divided body 15 and 16 is supported by a plurality of second crank mechanisms 60 and 61. Therefore, the pair of main body side cutter head divided bodies 60 and 61 can be separated left and right, and the front side of the divided frame 12 can be completely opened.
When the front end of the second shield machine 100 is fitted into the first shield machine 1, the second shield machine 100
Interference with the main body side cutter head 11 of the shield machine 1 can be reliably prevented.

Next, another embodiment will be described. still,
The same reference numerals are given to the same components as those in the above embodiment, and the description will be omitted. As shown in FIGS. 14 and 15, the first shield machine 1 </ b> A is a watertight mechanism 80 of the first shield machine 1.
, The split cutter head 2 and the screw conveyor 5 are partially changed, and an elastic receiving ring 127 is provided for receiving the front end of the penetration ring 140 of the second shield excavator 130 and stopping water. It is. Further, the sub-body member 27 and the divided frame 12A are
2 is fixedly provided.

An annular concave portion 128 is formed in the outer peripheral portion of the divided frame 12A from the front side thereof. An annular elastic receiving ring 127 is fitted into the annular concave portion 128, and the screw conveyor 5A passes through the inside of the sub-body member 27. , The front end of which is between the inside of the elastic receiving ring 127 and the chamber 2
9 are arranged in an inclined manner so as to reach the lower end.

As shown in FIG. 15, the divided cutter head 10A has a main body 20A occupying most of the main body, and a main body 20A and a pair of frames 22A located at the upper end of the outer peripheral portion of the divided cutter head 10A. And a movable portion 21A connected to the frame 22A. A hydraulic cylinder 23A is incorporated in each frame 22A.

The movable section 21A is the same as the movable section 21 of the above embodiment.
The movable cutter 21 is configured to be able to be lowered by the hydraulic cylinder 23A more greatly than the lowering stroke of the movable part 21 of the embodiment. When the movable part 21 is at the upper limit position, the divided cutter head 10A is viewed from the front. Secondary trunk member 2
7, the penetrating ring 140 of the second shield excavator 130 does not interfere with the split cutter head 10A when the penetrating ring 140 is fitted.

As shown in FIG. 16, the second shield machine
130 includes a cutter head 131 and a body member 132. Inside the body member 132, in addition to a cutter head rotation drive mechanism 135 including a cutter head support mechanism 134 and a hydraulic motor 136, etc., and a cylindrical shape for underground joining. And an extrusion drive mechanism 14 that pushes the penetration ring 140 forward.
1 is provided. Although not shown, a plurality of shield jacks, an electr device, a perfect circle holding device, a rear work deck, and the like are also provided.

The penetrating ring 140 has substantially the same shape and size as the divided frame 12 of the first shield machine 1A, is formed with a slightly smaller diameter than the sub-fuselage member 27, and is located near the inside of the front part of the trunk member 132. They are arranged concentrically. Penetration ring 14
A cylindrical inner body 137 is provided concentrically near the inside of 0. A ring member 138 with a seal is fixed to the inner surface of the front end of the body member 132, a ring member 139 with a seal is fixed to the front end of the inner body 137, and a penetrating ring 140 slides between the two ring members 138. An annular sliding gap that can pass through is formed.

A ring web member 150 is fixed to the inner surface of the middle part of the body member 132.
7, a partition 151 is provided inside the middle portion of the inner body 137, and a chamber 152 is formed between the partition 151 and the cutter head 131. In addition, chamber 15
There are also provided a water pipe 153 for supplying water into the inside, a mud pipe 154 for discharging mud water containing excavated earth and sand in the chamber 152, and a swivel joint 155 for supplying hydraulic pressure to the hydraulic cylinder 173 of the cutter head 131. ing.

The push-out drive mechanism 141 has a plurality of push-out jacks 143 (see FIG. 18) fixedly disposed in the horizontal direction on the rear side of the ring web 150 at the time of underground joining. A pusher is provided at the tip of the piston rod of each push-out jack 142 so that a rod-like pusher 142 extending from the rear end of the penetrating ring 140 passes through the ring web member 150 at a portion corresponding to each pusher. Opening holes are formed.

As shown in FIG. 17, the cutter head 131 has cutter spokes 160, 161 and an outer ring 162,
It has face plates 163 and 164, on which a number of cutter bits are mounted. The cutter spoke 161 is provided with a copy cutter 165. When the copy cutter 165 is driven to the larger diameter side, the copy cutter 165 is engaged with the outer peripheral ring 162 and protrudes outside thereof.

The cutter spoke 160 has a fixed cutter spoke 170 and a movable cutter spoke 171. The movable cutter spoke 171 is
It is formed integrally with the cylinder body (see FIG. 16), and is configured to be expandable and contractible in the radial direction by a hydraulic cylinder 173 thereof.

When the connection between the copy cutter 165 and the movable cutter spoke 171 is released from the outer peripheral ring 162, the front of the penetration ring 140 is opened, and in this state, the penetration driving mechanism 141 penetrates. ring
By pushing 140 forward and driving it, it is possible to make a part of it protrude forward from the cutter head 131.

Next, the first and second shield machine 1
The underground joining step of joining A, 130 underground will be described. Note that the first to fourth steps are the main embodiment, and the description thereof will be omitted. However, in the second step, a hydraulic jack 91 for driving the sub trunk member 27 into and out is provided.
, And the third step is omitted.

Next, as shown in FIG. 17, a second shield excavator 130 is shield-excavated to a predetermined underground junction,
The second shield excavator 130 is positioned so as to be concentric with the sub-fuselage member 27 of the first shield excavator 1A.
, The copy cutter 165 and the movable cutter spoke (hydraulic cylinder) 171 are driven to move in the diameter reducing direction, so that the cutter spokes 160 and 16 of the cutter head 131 are moved.
1 and the outer ring 162
An annular gap is formed between the outer ring 160 and the outer ring 160.

Thereafter, when the penetration ring 140 is pushed forward by the pushing drive mechanism 141, the penetration ring 14
No. 0 passes between the cutter spokes 160 and 161 and the outer peripheral ring 162 and fits into the inside of the first shield machine 1A.
7, water is stopped between the divided frame 12A and the penetration ring 140, and the shield machine 1A, 130 is joined.

Thereafter, although not shown, the penetration ring 14
0, the ground on the outer peripheral side is improved, and the water between the divided frame 12A and the penetration ring 140 is more securely stopped.
In the inside of the tip of the penetration ring 140 and the divided frame 12A,
The annular connecting portion is fixed by welding or the like. After that, although not shown, after dismantling and removing unnecessary various equipment,
Perform secondary lining work on the joint.

According to this underground junction type shield machine,
Since the first shield excavator 1A is provided with the elastic receiving ring 127 and the second shield excavator 130 is provided with the penetrating ring 140 and the pushing drive mechanism 141, the first and second shield excavators 1A and 130 are brought close to and opposed to each other. In this state, the penetration ring 14 is driven by the pushing drive mechanism 141 from the second shield machine 130.
0 is pushed forward to drive the penetration ring 140
Elastic end ring of the first shield machine 1A
The shield excavators 1A and 130 can be joined underground in a state where the water is stopped by being received by the 127.

Further, as compared with the above embodiment, the divided frame 12A and the sub-body member 127 do not have to be retreated at the time of underground joining, so that the divided frame retreat moving mechanism 90 can be omitted. In addition, the structure of the first shield machine 1A is simplified, which is advantageous in manufacturing cost. Other effects are substantially the same as those of the first aspect.

In another embodiment, the second shield excavator 130 is provided with an elastic receiving ring 127, and the first shield excavator 1A is provided with a penetrating ring 140 and an extrusion drive mechanism 141.
From the first shield excavator 1A, and an extrusion drive mechanism.
The front end of the penetrating ring 140 is driven by the second shield excavator by pushing the penetrating ring 140 forward by the 141.
The shield excavators 1A and 130 may be joined underground in a state where the water is stopped by being received by the elastic receiving ring 127 of 130.

Next, the first embodiment and the other embodiments will be described.
A modified example in which the shield machine 1 and 1A are partially changed will be described. 1] The first shield excavator 1B shown in FIGS. 19 and 20 includes a cutter head 2B, a body member 3B, a frame member 4B, and the like. The cutter head 2B has a partly divided cutter head 10B and the remaining main body side cutter. And a frame member 4B having a divided frame 12B corresponding to the divided cutter head 10B and a main body side cutter head 11B.
B corresponding to the main body side frame 13B.

The main body side cutter head 11B is composed of a plurality of main body side cutter head divided bodies 15B, 16B and 17B. The divided cutter head 10B has a plurality of first cutter heads.
Sub-body frame 1 swingably movable by crank mechanism 40B
2B, the main body side cutter head divided body 15B,
16B and 17B are a plurality of second crank mechanisms 60B and 61
B and 62B are swingably supported by the main frame 13B.

The divided cutter head 10B is oscillated by an oscillating drive mechanism (not shown) via a first crank mechanism 40B, so that the main body side cutter head divided bodies 15B and 16B are driven.
B and 17B are oscillated by a main body oscillating drive mechanism (not shown) via second crank mechanisms 60B, 61B and 62B, respectively.

The split cutter head 10B has a main body 20B occupying most of it and a movable portion 21B located at the upper end of the split cutter head 10B, and is incorporated into spokes that connect them at the time of underground joining. The movable unit 21B is configured to be driven downward by a retracting mechanism including a hydraulic cylinder and retracted toward the center of the divided cutter head frame 10B.

As shown in FIG. 19, when excavating the shield,
The outer shape of the cutter head 2B is substantially circular. In this state, the divided cutter head 10B and the main body side cutter head 11B are driven to swing in synchronization with each other, and a tunnel having a circular cross section having substantially the same shape as the cutter head 2B is excavated.

Thereafter, as shown in FIG. 20, after the main body side cutter head divided body 15B, 16B, 17B is separated to the lower left and right, the movable portion 21B of the divided cutter head 10B is driven downward to move the central part of the divided cutter head 10B. By pulling in to the side, a front end portion of a second shield excavator (not shown) having a rectangular shape in a front view can be fitted, or a penetration ring of a second shield excavator of a penetration ring type can be fitted.

2] The first shield excavator 1C shown in FIGS. 21 and 22 includes a cutter head 2C, a body member 3C, a frame member 4C, and the like. The cutter head 2C has a partly divided cutter head 10C and the remaining part. The frame member 4C has a divided frame 12C corresponding to the divided cutter head 10C and a main body side frame 13C corresponding to the main body cutter head 11C.

The main body-side cutter head 11C is composed of a pair of left-right symmetric main body-side cutter head divided bodies 15C and 16C. The divided cutter head 10C is swingably supported by the sub main frame 12C by a plurality of first crank mechanisms 40C, and the main body side cutter head divided body 15C
C and 16C are swingably supported on the main body side frame 13C by a plurality of second crank mechanisms 60C and 61C, respectively.

The divided cutter head 10C is oscillated by an oscillating drive mechanism (not shown) via a first crank mechanism 40C, and the main body side cutter head divided bodies 15C, 16C
Are driven by a main body side swing drive mechanism (not shown) via the second crank mechanisms 60C and 61C, respectively.

The split cutter head 10C has a main body portion 20C occupying most of the main portion and a movable portion 21C located at the upper end portion of the split cutter head 10C. A movable mechanism 21C is driven down by a retracting mechanism including a hydraulic cylinder, and is retracted toward the center of the divided cutter head 10C.

As shown in FIG. 21, when excavating the shield,
The outer shape of the cutter head 2C is substantially rectangular. In this state, the divided cutter head 10C and the main body-side cutter head 11C are swingably driven in synchronization with each other, and a tunnel having a rectangular cross section substantially the same shape as the cutter head 2C is excavated.

Thereafter, as shown in FIG. 22, the main body-side cutter head divided bodies 15C and 16C are separated to the left and right, and the movable portion 20C of the divided cutter head 10C is driven downward to be drawn into the center of the divided cutter head 10C. Thereby, the front end portion of the second shield excavator (not shown) having a rectangular shape in a front view can be fitted, or the penetrating ring of the penetrating ring type second shield excavator can be fitted.

3] The first shield machine 1D shown in FIG.
In the first shield machine 1C, a cutter head 2C is changed. That is, the cutter head 2D
The main body-side cutter head 11D is integrally formed, and when the main body-side cutter head 11D is in a predetermined swing position,
The front end of the second shield machine can be inserted, or
The penetrating ring of the penetrating ring type second shield machine can be fitted.

4) In addition, by using cutter heads and split cutters of various shapes and sizes, tunnels of various excavated cross sections (circular cross section, rectangular cross section, elliptical cross section, etc.) of the same shape different in size, and Enables underground joining of tunnels of different excavation cross sections (circular cross section, rectangular cross section, etc.).

5) In the above-described embodiment and another embodiment, for example, by applying a servo motor to the hydraulic motor 51, it becomes possible to reliably perform synchronous drive control of the divided cutter head 10 and the main body side cutter head 11. , Split cutter head 10 and main body side cutter head 1
The connecting members 17 and 18 for connecting 1 can be omitted. In the above-described modification, the connecting member is omitted. However, at the time of shield excavation, the divided cutter head and the main body-side cutter head may be connected so that the connecting member can be disconnected by the connecting member.

6] Furthermore, especially when the main body side cutter head is small, the main body side cutter head is connected to the divided cutter head by a connecting member or the like, so that the main body side swing drive mechanism and a plurality of The two-crank mechanism can be omitted.

The underground shielded excavator according to the present invention is not limited to the underground shielded excavator of the above-described embodiment and modifications, and various modifications may be added without departing from the present invention. , And can be applied to an underground junction type shield machine.

[0120]

According to the underground joint type shield excavator of the first aspect, the first shield excavator and the split cutter head are connected to each other so that the first and second shield excavators can be connected in a desired positional relationship. Since the divided frames can be arranged, the connection relationship between the first and second shield excavators can be set freely.

Furthermore, by using cutter heads of various shapes in the first shield excavator, tunnels having substantially the same shape as the cutter head can be excavated. A tunnel capable of forming a tunnel having an excavated cross section can be applied. In this case, tunnels having various excavated cross sections having different sizes (a circular cross section, a rectangular cross section, an elliptical cross section, etc.), and further, excavated cross sections having different shapes (a circular cross section) And a tunnel having a rectangular cross section) can be joined underground.

Further, in the first shield machine,
Since the divided cutter head can be driven to swing through a plurality of first crank mechanisms with a smaller driving torque than a conventional shield excavator that rotationally drives a spindle of a conventional cutter head, the manufacturing cost of the swing driving means is reduced. This is advantageous, and the frequency of use (digging load) of a large number of bits attached to the front portion of the cutter head is substantially uniform, so that their wear can be prevented.

According to the underground joint type shield excavator of the second aspect, the same effect as that of the first aspect is exerted, but both the front end portion of the second shield excavator and the first shield excavator are fitted to the first shield excavator. Since a water stop mechanism is provided to stop water between the shield excavators, water can be easily and reliably stopped between both shield excavators by this water stop mechanism, and inflow of muddy water etc. from between both shield excavators. Can be prevented.

According to the third aspect of the present invention, in the state where the first and second shield excavators are approached and opposed to each other, an extruding drive mechanism is used from one of the first and second shield excavators. By pushing forward the penetration ring for underground joining having substantially the same shape and size as the divided frame, the front end of the penetration ring is received and stopped by the other elastic receiving rings of the first and second shield excavators. Water can be connected underground to both shield excavators. Other effects substantially the same as those of the first aspect are obtained.

According to the underground joint type shield excavator of the fourth aspect, the same effect as any one of the first to third aspects can be obtained, but the first shield excavator is provided with the outer peripheral portion of the divided cutter head. Since the retracting means for at least partially pulling the split cutter head toward the center is provided, when the split cutter head is retracted, it is possible to reliably prevent the outer peripheral portion of the split cutter head from interfering with the main body side frame, Also,
When the shield excavator is joined by the penetrating ring, it is possible to reliably prevent the penetrating ring extruded from one of the first and second shield excavators from interfering with the split cutter head.

According to the shield excavator of the fifth aspect, the same effect as any one of the first to fourth aspects can be obtained, but the main body side cutter head is swung by the first shield excavator. Since a plurality of second crank mechanisms having the same crank radius as the first crank mechanism are freely supported on the frame on the main body side, the main body side cutter head can be easily and reliably moved by the synchronous oscillating means by the swing motion of the divided cutter head. Can be synchronized.

According to the underground joint type shield excavator of the sixth aspect, the same effect as that of the fifth aspect is obtained, but the synchronous oscillating means oscillates the main body side cutter head via the second crank mechanism. In particular, the main body side swing drive means
Even if the main body-side cutter head is large, the main body-side oscillating drive means can oscillate and drive the main body-side cutter head in synchronization with the oscillating motion of the divided cutter head.

According to the underground joint type shield excavator of the seventh aspect, the same effect as any one of the first to sixth aspects can be obtained, but the synchronous swinging means comprises a divided cutter head and a main body side cutter head. Since there is a connecting means for mechanically connecting
The body-side cutter head can be easily and reliably synchronized with the swinging motion of the divided cutter head.

According to the underground joint type shield excavator of the eighth aspect, the same effect as that of the fifth or sixth aspect is obtained, but the main body side cutter head is composed of a plurality of main body side cutter head divided bodies, The side cutter head divided body has a plurality of second
Since it is supported by the crank mechanism, the plurality of main body side cutter head divided bodies can be separated, and the front side of the divided frame can be completely opened. In the case where the shield excavator is inserted, the second shield excavator can be prevented from interfering with the main body-side cutter head. It is possible to reliably prevent the penetration ring extruded from one side from interfering with the main body side cutter head.

According to the ninth aspect of the present invention, the same effect as that of the eighth aspect is obtained, but each of the main body side cutter head divided bodies is independently swung by the main body side swing driving means. Since it is driven, the plurality of main body side cutter head divided bodies can be independently driven to swing and reliably separated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a first shield machine according to an embodiment of the present invention.

FIG. 2 is a front view of a first shield excavator (during excavation).

FIG. 3 is a partial sectional view of a main part of the first shield machine shown in FIG. 2;

FIG. 4 is a front view of the first shield machine (at the time of joining).

5 is a cross-sectional view taken along line VV of FIG. 1, and the right-hand half is a rear view.

FIG. 6 is a cross-sectional view of a main part including a water stopping mechanism (when not operating) of the first water stopping machine.

FIG. 7 is a sectional view of a main part including a water stopping mechanism (at the time of operation) of the first water stopping machine.

FIG. 8 is a longitudinal sectional view of a second shield machine.

FIG. 9 is a front view of the second shield machine.

FIG. 10 is a view showing an operation process of underground joining.

FIG. 11 is a diagram showing an operation process of underground joining.

FIG. 12 is a diagram showing an operation process of underground joining.

FIG. 13 is a diagram showing an operation process of underground joining.

FIG. 14 is a longitudinal sectional view of a first shield machine according to another embodiment.

FIG. 15 is a front view of the first shield machine shown in FIG. 14;

FIG. 16 is a longitudinal sectional view of a second shield machine according to another embodiment.

FIG. 17 is a front view of the second shield machine shown in FIG. 16;

FIG. 18 is a view showing an operation process of underground joining according to another embodiment.

FIG. 19 is a first shield excavator according to a modification (during excavation).
FIG.

FIG. 20 is a front view of the first shield machine (at the time of joining) of FIG. 19;

FIG. 21 is a front view of a first shield machine (during excavation) according to another modification.

FIG. 22 is a front view of the first shield machine (at the time of joining) of FIG. 21;

FIG. 23 is a front view of a first shield machine according to still another modification.

[Explanation of symbols]

1, 1A to 1D First shield machine 2, 2A to 2D Cutter head 3, 3B, 3C Body member 4, 4B, 4C Frame member 10, 10A to 10C Split cutter head 11, 11B to 11D Main body side cutter head 12, 12B, 11C Divided frame 13, 13B, 13C Body side frame 15, 15B, 15C, 16, 16B, 16C, 17B
Main body side cutter head divided body 17, 18 Connecting member 23 Hydraulic cylinder 40, 40B, 40C, 45 First crank mechanism 50 Swing drive mechanism 60, 60B, 60C, 61, 61B, 61C, 62B
Second crank mechanism 70, 71 Main body side swing drive mechanism 80 Water stop mechanism 90 Split frame retreat movement mechanism 100, 130 Second shield excavator 128 Elastic receiving ring 140 Penetration ring 141 Push-out drive mechanism

Claims (9)

(57) [Claims] An underground joint type shield excavator comprising a first and a second shield excavator, wherein the two shield excavators are excavated in a phase approaching direction and are joined underground. The excavator includes a cutter head, a body member, and a frame member inside the body member, wherein the cutter head has a partly divided cutter head and the remaining main body side cutter head, and the frame member Has a divided frame corresponding to the divided cutter head and a main body side frame corresponding to the main body side cutter head; a plurality of first crank mechanisms for swingably supporting the divided cutter head on the divided frame; Swing drive means for swinging and driving the head via a first crank mechanism; A synchronous swinging means for synchronizing with the second frame, and a split frame retracting mechanism for reciprocatingly moving the divided cutter head and the divided frame with respect to the main body side frame in order to fit the front end portion of the second shield machine with substantially no gap. A ground excavation shield excavator, comprising: 2. A water stopping mechanism for stopping water between the two shield excavators in a state where a front end portion of the second shield excavator is fitted into the first shield excavator. An underground joint type shield machine described in (1). 3. An underground joint type shield excavator comprising first and second shield excavators, wherein both shield excavators are excavated in directions approaching each other and joined underground. The excavator includes a cutter head, a body member, and a frame member inside the body member, wherein the cutter head has a partly divided cutter head and a remaining main body side cutter head, and the frame member Has a divided frame corresponding to the divided cutter head, and a main body side frame corresponding to the main body side cutter head, a plurality of first crank mechanisms for swingably supporting the divided cutter head on the divided frame, Oscillating drive means for oscillating the head via a first crank mechanism, and oscillating motion of the cutter head which divides the main body side cutter head. A swinging means for synchronizing the undercut with one of the first and second shield excavators; a penetration ring for underground joining having substantially the same shape and the same size as the divided frame; Underground joint type shield excavator, wherein an elastic receiving ring for receiving the front end of the penetrating ring and stopping water is provided on the other of the first and second shield excavating machines. Machine. 4. The first shield machine according to claim 1, further comprising a retracting means for retracting at least a part of an outer peripheral portion of the divided cutter head toward a central portion of the divided cutter head. 2. The underground junction type shield machine according to claim 1. 5. A first shield excavator, wherein a plurality of second crank mechanisms having a same crank radius as the first crank mechanism are provided, the main body side cutter head being swingably supported on the main body side frame. Any one of claims 1 to 4
Underground junction type shield machine described in the paragraph. 6. The underground apparatus according to claim 5, wherein said synchronous swinging means includes a body-side swing driving means for swingingly driving a body-side cutter head via a second crank mechanism. Joined shield machine. 7. The ground according to claim 1, wherein the synchronous oscillating means includes a connecting means for mechanically connecting the divided cutter head and the main body side cutter head. Medium junction type shield machine. 8. The main body-side cutter head is composed of a plurality of main body-side cutter head divided bodies, and each main body-side cutter head divided body is supported by a plurality of second crank mechanisms. Or the underground junction type shield machine described in 6. 9. Each of the main body side cutter head divided bodies,
The underground joint type shield excavator according to claim 8, wherein the underground shield type excavator is independently driven by the main body side rocking drive means.