JP2895057B1 - Double shielded excavator - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: In a conventional separable twin-type shield excavator, since both shield excavators are completely separated from each other in structure, when both shield excavators are integrally shield-excavated, one shield excavator is used. It is difficult to collectively operate both shield excavators in the operation unit of the shield excavator, and it is difficult to match the timing of pressing the segments with the shield jacks of both shield excavators. SOLUTION: The front bodies 25, 65 of the shield machines 2, 3 are provided.
A connecting mechanism 4 is provided for connecting the rear bodies 26 and 66 via spacers 110 and a pair of left and right connecting pins 111, and connecting the rear bodies 26 and 66 via a pair of left and right connecting pins 111. The electric cable 135 and the connecting hydraulic pipe 131 are arranged through the through hole 130, and the operation of both shield excavators is performed by one shield excavator 2 (or 3) at a time. , 3 can be matched with the timing at which the segments S1 and S2 are pressed by the shield jacks 14 and 54.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double shield type shield machine, and more particularly, to a drive control system in which a through-hole is formed in a connection pin of a connection mechanism for connecting trunk members of adjacent shield machine and is included in a drive control system. An electric cable or a hydraulic passage forming body is provided through a through hole.

[0002]

2. Description of the Related Art Conventionally, when two tunnels adjacent vertically or horizontally are excavated by a shield method, Japanese Unexamined Patent Application Publication No.
As described in JP-A-41871, JP-A-9-41878, JP-A-9-41879, and the like,
Usually, a double shield excavator in which two shield excavators are arranged vertically or horizontally is often used.

[0003] In this type of twin shield excavator,
Each shield machine is provided with a cutter head, a front body, a plurality of shield jacks, etc., and the front bodies of both shield machines are connected to each other by a connecting mechanism including a connecting pin in a state of being substantially in close contact with each other. A common rear body is connected to the front body of the shield excavator so as to be able to bend. 1 on device
Repeat the operation of assembling the segments for the ring,
Shield tunneling in two tunnels.

By the way, in the above-mentioned double shield excavating machine, since one common rear body is provided, both shield excavating machines are vertically or horizontally separated during the shield excavating.
After that, each shield excavator can not be shield excavated alone, and in order to realize that, instead of a common rear trunk, a rear trunk that is connected to each front fuselage so as to be able to bend is provided independently, It is necessary to connect the front body and the rear body of both shield excavators in a separable manner by a connection mechanism including a connection pin.

[0005]

However, in a double shielded excavator configured to be separable, both shield excavators are completely separated from each other in structure, so that both shield excavators are integrally shielded. At this time, the operation of both shield excavators cannot be performed collectively by the operation unit of one shield excavator. In other words, the operation of both shield excavators will be performed independently.In this case, the timing of pressing the segments with the shield jacks of both shield excavators is likely to shift, and a large shear force acts on the connection pin, so the connection The thickening of the pins and the reinforcement of the body after supporting the connecting pins are required, which increases the size of the connecting mechanism and increases the manufacturing cost.

An electric cable extending from the drive control system of both shield excavators to the ground via the excavated tunnel and the shaft, respectively, and an operation unit connected to the electric cables is provided on the ground, so that both shield excavators are provided. Can be performed collectively on the ground, but the equipment cost required for wiring the electric cables is expensive, but it is difficult to operate while performing rolling control, checking the tail clearance, etc. It is difficult to operate the shield machine on the ground at once.

Further, since both shield excavators are completely separated in structure, the hydraulic system for supplying hydraulic pressure to the shield jacks of both shield excavators is also independent, and the excavation speed of both shield excavators is the same. It is difficult to set the propulsion force of the shield jack so that
Since there is a possibility that a large shearing force acts on the connecting pin, it is necessary to increase the thickness of the connecting pin and to reinforce the rear body for supporting the connecting pin, which increases the size of the connecting mechanism and increases the manufacturing cost. It should be noted that the same problems as described above also occur in a double-shielded machine in which a plurality of shield machines are juxtaposed vertically or horizontally.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a double-shielded machine capable of operating a plurality of shield machines at a time by an operation unit of one of the plurality of shield machines. That is, the timings of pressing the shield jacks of a plurality of shield excavators are matched, the excavation speeds of both shield excavators are made the same, the coupling mechanism is downsized, and the manufacturing cost is reduced.

[0009]

According to a first aspect of the present invention, there is provided a double-shielded tunnel machine comprising a plurality of shield tunnels arranged side by side vertically or horizontally. A connecting mechanism for connecting the body members to each other via a spacer and a connecting pin is provided, a through hole is formed in the connecting pin of the connecting mechanism, and an electric cable and a hydraulic passage forming body included in a drive control system for shield excavation are provided. At least one is provided through the through hole.

[0010] In this double-shielded excavator, a plurality of shield excavators are integrally excavated in a state in which the trunk members of adjacent shield excavators are connected to each other via a spacer and a connecting pin by a connecting mechanism. Multiple tunnels adjacent vertically and horizontally can be excavated in parallel, and by disconnecting the connection by the coupling mechanism, both shield excavators are separated from each other. It is also possible to excavate the shield.

When a plurality of shield excavators are integrally shielded, a control signal for synchronizing the shield excavation of the plurality of shield excavators is transmitted through an electric cable disposed through a through hole of a connecting pin. In addition, it is possible to transmit hydraulic pressure for synchronously operating shield jacks of a plurality of shield excavators via a hydraulic passage forming body provided through a through hole of a connecting pin.

Therefore, by arranging the electric cable through the through-hole of the connecting pin, the operation section of one of the plurality of shield excavators collectively controls the operation of the plurality of shield excavators. And can also be
By disposing the hydraulic passage forming body through the through hole of the connecting pin, the hydraulic pressure supplied to the shield jacks of the plurality of shield excavators can be adjusted to the same pressure.

As a result, the timing of pressing the segments with the shield jacks of a plurality of shield excavators is matched,
It is easy to set the propulsion force to push the segment with the shield jack so that the excavation speed of both shield excavators is the same, and the shear force acting on the connection pin of the coupling mechanism that connects the trunk members of adjacent shield excavators is reduced. Since the connecting pins can be made thinner and the reinforcing portions thereof can be simplified, the connecting mechanism can be downsized and the manufacturing cost can be reduced.

Further, by arranging the electric cable through the through-hole of the connecting pin, it becomes possible to obtain various information from a plurality of shield excavators at an operation unit for operating the plurality of shield excavators. Based on such information, it is possible to reliably operate and operate a plurality of shield excavators while performing rolling control, particularly checking tail clearance during excavation of a curved tunnel.

A double shielded machine according to a second aspect of the present invention is characterized in that, in the invention of the first embodiment, a center bending portion is provided on a body member of each shield machine. Therefore, when a plurality of shield excavators integrally excavate the shield,
When each shield excavator independently excavates the shield, it becomes possible to excavate the curved tunnel.

According to a third aspect of the present invention, there is provided the double-shielded machine according to the first or second aspect, wherein the connecting mechanism has a front connecting pin and a rear connecting pin, and the through-hole is provided in one of the through holes. The connection pin is formed. In other words, the connection mechanism having the front connection pin and the rear connection pin allows the trunk members of the adjacent shield machine to be reliably connected to each other, and the through hole is formed in any one of the connection pins. It is not necessary to form a through-hole in the connecting pin, and the structure of the connecting mechanism can be simplified, which is advantageous in terms of manufacturing cost.

According to a fourth aspect of the present invention, there is provided the double-shielded excavator according to any one of the first to third aspects, wherein a plurality of shield excavators are shielded through an electric cable disposed through the through hole. A control signal for synchronizing the excavation is transmitted. Therefore, shield excavation of a plurality of shield excavators can be reliably synchronized.

According to a fifth aspect of the present invention, there is provided a double-type shield excavator according to the fourth aspect of the present invention, wherein the shield jacks of the plurality of shield excavators are synchronously operated via a hydraulic passage forming member provided through the through hole. The hydraulic pressure for the transmission is transmitted. Therefore, the shield excavation of the plurality of shield excavators can be synchronized more reliably.

According to a sixth aspect of the present invention, there is provided a double-shielded machine according to any one of the first to fifth aspects, wherein a plurality of shield excavators are each independently shielded when the connection by the connection mechanism is released. It is characterized by being excavable. Therefore, after a plurality of shield excavators are integrally excavated, the connection by the coupling mechanism can be released to separate the plurality of shield excavators, and thereafter, the plurality of shield excavators can be individually used. Shield excavation is possible.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is an example in which the present invention is applied to a double shield excavator in which two shield excavators of a muddy water type are vertically arranged. However, the front, rear, left and right in the excavation direction will be described as front, rear, left and right. As shown in FIGS. 1 to 3, the double shield excavator 1 includes a first shield excavator 2 and a second shield excavator 3.
The first and second shield machines 2 and 3 are connected by a connecting mechanism 4 so as to be separable.

The first shield machine 2 includes a cutter head 10, a body member 11, a head rotation support mechanism 12, a head rotation drive mechanism 13, a plurality of shield jacks 14, a plurality of bent jacks 15, an erector device 16, a water pipe. 17,
It has a drain pipe 18 and the like. The cutter head 10 has a plurality of cutter bits 21 (for example, 4
) Of the plurality of (for example, two) cutter spokes 20 b, and copy cutters 23 driven in the radial direction by the hydraulic cylinder 22 are provided at the tip portions of the plurality of (for example, two) cutter spokes 20 b. .

The trunk member 11 includes a front trunk 25, a rear trunk 26,
A middle bend portion 27 is fixed to the front end of the rear body 26 and connects the front body 25 and the rear body 26 so that the middle body can be bent. Front torso 25
A body frame 30 including a partition wall 28 is fixed to a front end portion of the main body 30. A portion surrounded by the partition wall 28, the front trunk 25, and the cutter head 10 becomes a chamber 33 for collecting excavated soil excavated by the cutter head 10, The tip of the water pipe 17 reaches the upper end of the chamber 33, and the tip of the drainage pipe 18 reaches the lower end of the chamber 33. In addition, the water supply pipe 17 and the drainage pipe 18 are connected by a bypass pipe 17a.

The head rotation support mechanism 12 has a ring member 31 fixed in the vicinity of the outer peripheral portion of the rear surface of the cutter head 10, and this ring member 31 is rotatably supported by the main body frame 30 via a ring-shaped bearing. ing.
In addition, the hydraulic cylinder 2 of the cutter head 10 is
2 is provided with a swivel joint 32 for supplying hydraulic pressure, and a tail seal 29 is provided at the rear end of the rear trunk 26.

The head rotation drive mechanism 13 has a plurality of hydraulic motors 35 fixed to a ring-shaped member 34 of the main body frame 30, and a plurality of drive gears 36 respectively fixed to the output portions of the hydraulic motors 35. The hydraulic motor 35 is meshed with a ring gear 37 fixed to the rear end of the ring member 31, and these hydraulic motors 35 are driven synchronously.
The cutter head 10 is driven to rotate via the ring 7 and the ring member 31. A ring frame 40 is fixed to the inner surface of the rear end of the center bent portion 27, and a plurality of shield jacks 14 arranged at appropriate circumferential intervals are fixed to the ring frame 40 rearward. A spreader 14a is fixed eccentrically to the outer peripheral side at the output portion of each shield jack 14, and the spreader 14a uses the
Of the first shield excavator 2 can be obtained by pushing the front end of the shield rearward.

The erector device 16 comprises a rotating frame 46 rotatably supported on the rear trunk 26 via a plurality of rotating supports 45, a plurality of hydraulic motors 47 for rotating the rotating frame 46, and a rotating motor. Having the erector body 48 and the like mounted on the frame 46, after the excavation of one ring of the first shield excavator 2 is completed, the segment S1 of the next one ring can be assembled. In addition, both ends of each of the center folding jacks 15 are connected to the main body frame 30 and the ring frame 40.

The second shield machine 3 includes a cutter head 50, a body member 51, a head rotation support mechanism 52, a head rotation drive mechanism 53, a plurality of shield jacks 54, a plurality of center bending jacks 55, an erector device 56, Water pipe 5
7. It has a mud pipe 58 and the like. Note that the mechanisms, devices and members other than the cutter head 50 have the same structure as the first shield machine 2 and will be described briefly.

The cutter head 50 has a plurality of (for example, four) cutter spokes 60 a and 60 b to which a large number of cutter bits 61 are attached, and is configured to be wider than the cutter head 10 of the first shield excavator 2. The tip end of a plurality of (for example, two) cutter spokes 60b is driven forward and backward by a hydraulic cylinder 62, and
The copy cutters 63 located behind the copy cutter 23 of the shield machine 2 are provided respectively.

The trunk member 51 includes a front trunk 65, a rear trunk 66,
A middle bend 67, and a partition 68 at the front end of the front body 65.
Is fixed, the partition wall 68 and the front body 6 are fixed.
5 and the part surrounded by the cutter head 50 are the chamber 7
The water pipe 57 and the tip of the mud drain 58 reach the upper end and lower end of the chamber 73, and the water pipe 57 and the mud pipe 58 are connected by a bypass pipe 57a.

The head rotation support mechanism 52 has a ring member 71 fixed in the vicinity of the outer peripheral portion of the rear surface of the cutter head 10, and this ring member 71 is rotatably supported by the main body frame 70 via a ring-shaped bearing. ing. The head rotation drive mechanism 53 has a plurality of hydraulic motors 75 fixed to a ring-shaped member 74 of the main body frame 70, and a plurality of drive gears 76 fixed to the output portions of these hydraulic motors 75 respectively. And a ring gear 77 fixed to the rear end. The partition 68 is provided with a swivel joint 72, and a tail seal 79 is provided at the rear end of the rear trunk 66.

A ring frame 80 is fixed to the inner surface of the rear end of the center bent portion 67, and a plurality of shield jacks 54 arranged at appropriate intervals in the circumferential direction are fixed to the ring frame 80.
Is fixed backward. Each shield jack 5
A spreader 54a is eccentrically fixed to the outer peripheral side of the output portion 4 and the front end of the segment S2 is pushed backward by the spreader 54a, so that the thrust of the second shield machine 3 is obtained.

The erector device 56 includes a rotating frame 86 rotatably supported by a rear body 66 via a plurality of rotating supports 85, a plurality of hydraulic motors 87 for rotating the rotating frame 86, and a rotating motor. Having the erector body 88 and the like mounted on the frame 86, after the excavation of one ring of the second shield excavator 3 is completed, the segment S2 of the next one ring can be assembled. Note that both ends of each half-folded jack 55 are connected to the main body frame 70 and the ring frame 80.

Next, the connection mechanism 4 will be described.
As shown in FIGS. 1 and 3 to 5, the connecting mechanism 4 connects the front bodies 25 and 65 of the shield excavators 2 and 3 to each other via a spacer 90 on the front side and a connecting pin 91. As shown in FIGS. 3, 6, and 7, the rear bodies 26, 66 of the shield excavators 2, 3 are connected to each other via rear spacers 110 and a pair of left and right connection pins 111. Have been.

The front spacer 90 is provided from the front end to the rear end of the front bodies 25, 65. As shown in FIG. 4, the spacer 90 is interposed between the front bodies 25, 65 which are brought close to each other. The concave curved surface 90a on the upper side and the concave curved surface 90b on the lower side of the spacer 90 abut on the outer peripheral surfaces of the front trunks 25 and 65, respectively. The bolts 92 are fastened from inside the front bodies 25 and 65, respectively.

Each concave curved surface 90a, 90 of the spacer 90
In the vicinity of the outer end of b, annular grooves 90c are respectively formed outside the left and right bolts 92, and a seal member 93 is mounted in each annular groove 90c, and in a state where the spacer 90 is in contact with the front bodies 25 and 65, The seal member 93 is in close contact with the front trunks 25 and 65, and the insides thereof are sealed. As shown in FIG. 5, a horizontal receiving member 94 is fixed to each bolt fastening portion on the inner surface of the front bodies 25 and 65, and bolt holes 95 formed in the horizontal receiving member 94 and the front bodies 25 and 65. To
The bolt 92 is inserted through the O-ring 96 and the spacer 9
0.

Up and down symmetrical connection reinforcing members 100 and 101 having front end surfaces abutting on ring-shaped members 34 and 74 are fixed to the lower end portion of the inner surface of the front trunk 25 and the upper end portion of the inner surface of the front trunk 65, respectively. A connecting block 102 is fixed to the upper end of the reinforcing member 100. Vertical insertion holes 103 formed in the front trunks 25, 65, the spacer 90, and the connection reinforcing members 100, 101.
The connecting pin 91 is inserted from the inside of the front body 25, the head portion 91 a of the connecting pin 91 is locked by the connecting block 102, and the nut member 105 is screwed into the screw portion 91 b at the lower end portion of the connecting pin 91 via the washer 104. It is screwed together.

The rear spacer 110 is provided over the entire length of the rear bodies 26 and 66, and as shown in FIGS. 6 and 7, the spacer 110 is interposed between the rear bodies 26 and 66 which are brought close to each other. The concave curved surface 110a on the upper side and the concave curved surface 110b on the lower side of the spacer 110 abut against the outer peripheral surfaces of the rear trunks 26 and 66, respectively. 112 are fastened from inside the rear trunks 26 and 66, respectively.

In the vicinity of the outer ends of the concave curved surfaces 110a and 110b of the spacer 110, annular grooves are respectively formed outside the left and right bolts 112, a seal member 113 is mounted in each annular groove, and the spacer 110 is attached to the rear body. In the state where the seal members 113 are in contact with the rear bodies 26 and 66, the seal members 113 are in close contact with the rear bodies 26 and 66, and the insides thereof are sealed. The mounting of each bolt 112 is substantially the same as described above, and a detailed description thereof will be omitted.

At the lower end portion of the inner surface of the rear trunk 26 and the upper end portion of the inner surface of the front trunk 66, vertically symmetrical connection reinforcing members 120, 121 whose front end surfaces are in contact with the ring frames 40, 80 are fixed, respectively. A pair of left and right vertical insertion holes 12 formed in the rear trunks 26, 66, the spacer 110, and the connection reinforcing members 120, 121.
3, a pair of connecting pins 111 are inserted from the inside of the rear body 26, and the head 111a of each connecting pin 111 is connected to the connecting reinforcing member 120.
The nut member 125 is screwed and fastened to the screw portion 111b at the lower end portion of the connecting pin 111 via a washer 124.

Now, a pair of connecting pins on the rear side of the connecting mechanism 4
A through-hole 130 is formed in each of the 111.For example, a connection hydraulic pipe 131 included in the drive control system is disposed in the through-hole 130 of the left connection pin 111, and a through-hole 130 of the right connection pin 111 is formed in the through-hole 130 of the left connection pin 111. Is provided with an electric cable 135 included in the drive control system.

The drive control system of the double shield machine 1 will be described with reference to FIG. The first shield machine 2 is provided with an operation panel 140 including a control device and a hydraulic circuit 141 for supplying hydraulic pressure to the plurality of shield jacks 14. The hydraulic circuit 141 includes a hydraulic supply unit 142 and a plurality of hydraulic circuits. A plurality of direction switching electromagnetic control valves 143 and a flow rate adjusting electromagnetic control valve 144 including a variable throttle valve 145 corresponding to the shield jack 14 are provided.

A supply oil passage extending from the hydraulic supply unit 142
146 are connected to a plurality of first oil passages 147 respectively connected to the plurality of shield jacks 14, each of the first oil passages 147 is provided with a flow control electromagnetic control valve 144, and each of the first oil passages 147 and each shield A direction switching electromagnetic control valve 143 is provided in a return oil passage 148 extending from the jack 14 to the hydraulic supply unit 142. When the first shield machine 2 is to be independently shielded, the operation panel 140 is operated to drive and control each of the plurality of shield jacks 14 and the other actuators to control the first shield machine. 2
Can be operated.

On the other hand, the second shield machine 3 is also provided with an operation panel 150 including a control device and a hydraulic circuit 151 for supplying hydraulic pressure to the plurality of shield jacks 54.
The 151 is provided with a hydraulic supply unit 152, a plurality of direction switching electromagnetic control valves 153 corresponding to the plurality of shield jacks 54, a flow rate adjusting electromagnetic control valve 154 including a variable throttle valve 155, and the like.

A supply oil passage extending from the hydraulic supply unit 152
156 are connected to a plurality of first oil passages 155 respectively connected to the plurality of shield jacks 54. Each first oil passage 155 is provided with a flow control electromagnetic control valve 154, and each first oil passage 155 and each shield A direction switching electromagnetic control valve 153 is provided in a return oil passage 158 extending from the jack 54 to the hydraulic supply unit 152. By operating the operation panel 150 to drive and control each of the plurality of shield jacks 54 and driving and controlling the other actuators, the operation of the second shield excavator 3 can be performed.

When the first and second shield excavators 2 and 3 are integrally shield-excavated, the supply oil passages 146 and 156 of the oil passage circuits 141 and 151 of the first and second shield excavators 2 and 3 are connected to the connection hydraulic piping 131. Are connected via opening / closing valves 160 and 161 by a connecting oil passage 132 of the first and second shield excavators 2 and 2
The third operation panels 140 and 150 are connected by the electric cable 135.

Next, the operation of the twin shield machine 1 will be described. In the double shield excavator 1, the body members 11, 51 of the adjacent shield excavators 2, 3 are connected to the spacers 90, 110 and the connection pins 91, 11 by the connection mechanism 4.
1, the shield excavating machines 2 and 3 can be integrally excavated in a shield, and two tunnels vertically adjacent to each other can be excavated in parallel.
Is released, the shield machines 2 and 3 are separated from each other, and thereafter, the shield machines 2 and 3 can be individually shielded.

When the shield excavators 2 and 3 are integrally shielded and excavated, the electric cable 135 is provided through the through-hole 130 of the connecting pin 111 so that the electric cable 135 can be used to connect the shield excavators 2 and 3 to each other. The control panels 140 and 150 are connected to transmit a control signal for synchronizing the shield excavation of the shield excavators 2 and 3. The operation of the operation panel 140 of the first shield excavator 2 or the operation of the second shield excavator 3 can be performed. The operation of the shield excavators 2 and 3 can be collectively performed by the panel 150.

Further, by providing the connection oil passage 132 through the through hole 130 of the connecting pin 111, the connection oil passage 132
Hydraulic circuits 141, 151 for the first and second shield machines 2, 3
Supply oil passages 146 and 157, and both shield excavators 2, 3
The hydraulic pressure for synchronously operating the shield jacks 14 and 54 can be transmitted and adjusted to the same pressure.

As a result, the timing of pressing the segments S1 and S2 by the shield jacks 14 and 54 of the shield excavators 2 and 3 is matched, so that the excavation speed of the shield excavators 2 and 3 is the same. , 54, it is easy to set the thrust to push the segments S1 and S2,
The shearing force acting on the connecting pins 91 and 111 of the connecting mechanism 4 for connecting the body members 11 and 51 of the adjacent shield machines 2 and 3 can be reduced.

However, in each of the shield machines 2, 3,
By appropriately adjusting the number of shield jacks 14 and 54 to be operated and the flow rate of hydraulic pressure supplied to the plurality of shield jacks 14 and 54, both shield excavators can be used in accordance with various conditions such as a difference in excavation load. The timing of pressing the segments S1 and S2 with the shield jacks 14 and 54 of the two and three is matched, and the propulsion of pushing the segments S1 and S2 with the shield jacks 14 and 54 so that the excavation speed of the shield machine 2 and 3 is the same. You can set the power. Therefore, since the connecting pins 91 and 111 are made thinner and the reinforcing portions thereof are simplified, the connecting mechanism 4 can be made smaller and the manufacturing cost can be reduced.

Further, by arranging the electric cable 135 through the through hole 130 of the connecting pin 111, various information from the shield excavators 2, 3 can be transmitted.
Can be obtained from the operation panels 140 and 150 of the first or second shield excavators 2 and 3 that operate the vehicle. Based on the information, the rolling control and the confirmation of the tail clearance can be performed. The shield excavators 2 and 3 can be operated reliably.

Since the connecting mechanism 4 has the front connecting pins 91 and the rear left and right pair of connecting pins 111, the trunk members 11, 51 of the adjacent shield excavators 2, 3 can be reliably connected to each other. Since the through-hole 130 is formed in the pair of left and right connecting pins 111 on the rear side, it is not necessary to form a through-hole in the front connecting pin 91, so that the structure of the connecting mechanism 4 can be simplified and the manufacturing cost is advantageous. become.

In order to release the connection between the front spacer 90 and the connection pin 91 in FIG. 4, first, the nut member 105 is removed from the connection pin 91, and the connection pin 91 is pulled upward. In this state, the insertion hole 103 is not closed, but is sealed by the upper and lower seal members 93 to prevent inflow of groundwater or the like from the insertion hole 103. Next, after the insertion holes 103 are closed from the inside of the shield machines 2 and 3, respectively, the fixing of the spacer 90 by the plurality of bolts 92 is released. At this time,
When each bolt 92 is completely pulled out, groundwater or the like flows through bolt holes formed in the front bodies 11, 51.
2 is fixed by welding or the like without completely removing it.

The spacer 130 and the connecting pin 111 on the rear side of FIG.
When disconnecting the connection, the on-off valves 160 and 161 are closed, the connecting hydraulic piping 131 is removed, and the electric cable 135 is disconnected and removed from the operation panels 140 and 150.Then, the nut member 125 is removed from each connecting pin 111. Then, the connecting pin 111 is pulled out upward, then the insertion holes 130 are closed from the inside of the shield machines 2 and 3, respectively. Then, the fixing of the spacer 130 by the plurality of bolts 112 is released, and the bolts 112 are completely removed. It is fixed by welding etc. in a state where it does not exist.

As described above, after the connection by the connecting mechanism 4 is released and the shield excavators 2 and 3 are separated, the shield excavators 2 and 3 can be individually excavated. Since the bent portions 27 and 67 are provided on the trunk members 11 and 51 of the shield excavators 2 and 3, the front trunks 25 and 65 can swing with respect to the rear trunks 26 and 66, respectively. , 3 are able to excavate a curved tunnel when the shield excavators 2, 3 independently perform shield excavation.

As a modification of the above embodiment, a through hole 130 is formed only in one of the pair of left and right connecting pins 111,
The connection hydraulic piping 131 and the electric cable
It may be arranged through 135. Also, the front connecting pin 9
1 is formed with a through hole, and the connecting hydraulic
1 and an electric cable 135.

The twin shield excavator according to the above-described embodiment is merely an example of a multiple shield excavator. For example, a double shield excavator in which two shield excavators are arranged side by side on the left and right. Needless to say, the present invention can be applied to a multiple shield excavator in which three or more shield excavators are juxtaposed vertically or horizontally, and furthermore, various types of shield excavators may be used without departing from the spirit of the present invention. Modifications may be added.

[0057]

According to the first aspect of the present invention, a connecting mechanism is provided for connecting the trunk members of the adjacent shield machine via spacers and connecting pins, and a through-hole is formed in the connecting pin of the connecting mechanism. By arranging the electric cable of the drive control system through the through-hole of the connecting pin, the operation unit of one of the plurality of shield excavators collectively operates the shield excavators. By arranging the hydraulic passage forming body of the drive control system through the through hole of the connecting pin, the hydraulic pressure supplied to the shield jacks of the plurality of shield excavators can be adjusted to the same pressure.

As a result, the timing at which the segments of the shield jacks of the plurality of shield excavators press the segments are matched,
It is easy to set the propulsion force to push the segment with the shield jack so that the excavation speed of both shield excavators is the same, and the shear force acting on the connection pin of the coupling mechanism that connects the trunk members of adjacent shield excavators is reduced. It is possible to reduce the number of connecting pins, reduce the size of the connecting mechanism by reducing the connecting pins, and reduce the manufacturing cost.Furthermore, by arranging the electric cable through the through holes of the connecting pins, Information can be obtained from the operation unit that drives and operates a plurality of shield excavators, and based on the information, a plurality of shield excavators can be obtained while performing rolling control, particularly checking tail clearance while excavating a curved tunnel. Can be reliably operated.

According to the second aspect of the present invention, since the middle bent portion is provided in the body member of each shield excavator, when a plurality of shield excavators integrally excavate the shield, and when each shield excavator is used alone, It becomes possible to excavate a curved tunnel when excavating a shield. The other effects are the same as those of the first aspect.

According to the double-type shield excavator of the third aspect, the trunk members of adjacent shield excavators can be reliably connected to each other by the connection mechanism having the front connection pin and the rear connection pin. Since the holes are formed in any one of the connecting pins, it is not necessary to form through holes in the remaining connecting pins, so that the structure of the connecting mechanism can be simplified and the manufacturing cost is advantageous. The other effects are the same as those of the first or second aspect.

[0061] According to the double-shielded machine according to the fourth aspect, via the electric cable provided through the through hole,
Since the control signal for synchronizing the shield excavation of the plurality of shield excavators is transmitted, the shield excavation of the plurality of shield excavators can be reliably synchronized. In addition, the same effect as any one of the first to third aspects is obtained.

According to the fifth aspect of the present invention, the hydraulic pressure for synchronously operating the shield jacks of the plurality of shield excavators is transmitted through the hydraulic passage forming member provided through the through hole. Therefore, the shield excavation of the plurality of shield excavators can be more reliably synchronized. The other effects are the same as those of the fourth aspect.

According to the sixth aspect of the present invention, in a state where the connection by the connecting mechanism is released, the shield excavators can independently perform the shield excavation, respectively. After the shield excavation is performed, the connection by the connection mechanism is released, and the plurality of shield excavators can be separated from each other. Thereafter, the plurality of shield excavators can be individually shield excavated.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a double shield excavator according to an embodiment of the present invention.

FIG. 2 is a front view of the twin shield machine shown in FIG. 1;

FIG. 3 is a left half of IIIa-IIIa of FIG. 1 and a right half is IIIb of FIG.
FIG. 3 is a sectional view taken along a line IIIb.

FIG. 4 is a longitudinal sectional view of a main part including a spacer and a connecting pin on a front side of a connecting mechanism.

FIG. 5 is an enlarged view of a main part of FIG. 5;

FIG. 6 is a vertical sectional view of a main part including a spacer and a connecting pin on a rear side of a connecting mechanism.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a hydraulic circuit diagram of the double shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double shield excavator 2, 3 First and second shield excavator 4 Connection mechanism 11, 51 Body member 14, 54 Shield jack 90, 110 Spacer 91, 111 Connection pin 25, 65 Front trunk 26, 66 Rear trunk 27, 67 Bent section 130 Through hole 131 Connection hydraulic piping 132 Connection oil passage 135 Electric cable

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/06 301 E21D 9/08

Claims (6)

(57) [Claims] A connecting mechanism for connecting trunk members of adjacent shield excavating machines via spacers and connecting pins in a multiple-link type shield excavating machine in which a plurality of shield excavating machines are arranged vertically or horizontally. A through hole is formed in a connecting pin of the connecting mechanism, and at least one of an electric cable and a hydraulic passage forming body included in a drive control system for shield excavation is disposed through the through hole. Continuous shield excavator. 2. The double shield type shield machine according to claim 1, wherein a center bent portion is provided on a body member of each shield machine. 3. The connection mechanism according to claim 1, wherein the connection mechanism has a front connection pin and a rear connection pin, and the through hole is formed in any one of the connection pins. A double shield type shield machine. 4. A control signal for synchronizing shield excavation of a plurality of shield excavators is transmitted through an electric cable disposed through the through hole. 2. The multiple shield excavator according to claim 1. 5. The hydraulic pressure for synchronously operating shield jacks of a plurality of shield excavators is transmitted through a hydraulic passage forming member provided through the through hole. Double shield type shield machine. 6. The multiple link according to claim 1, wherein a plurality of shield excavators can independently perform shield excavation when the connection by the coupling mechanism is released. Type shield machine.