JPH0738465Y2 - Shield jack device in shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a shield jack device in a shield machine.

[Prior Art] An example of a general shield machine is shown in FIG. 4, in which 1 is a shield machine, 2 is a cylindrical shield frame,
3 is a cutter frame which is rotatably supported in the shield frame 2 via bearings and can be rotationally driven by a driving device (not shown). 4 is a cutter frame 3
A large number of cutters 5 mounted on the front face are provided with a plurality of shield jacks which are arranged inside the shield frame 2 at required intervals in the circumferential direction so that the axis l ₂ is substantially parallel to the axis l ₁ of the shield frame 2, 6 is an assembled segment in the tunnel, 7 is a screw conveyor which is a conveying device for conveying the earth and sand S excavated by the cutter 4 and taken into the chamber 8 in the cutter frame 3, and 9 is a belt which is also a conveying device. It is a conveyor.

At the time of work, the cutter frame 3 is rotationally driven by the drive device, and the cutting ground is excavated by the cutter 4. The excavated earth and sand S is taken into the chamber 8 inside the cutter frame 3, and the screw conveyor 7 and the belt conveyor 9
Is transported to the rear of the shield machine 1.

Further, the segment 6 is assembled in the rear portion of the shield frame 2, and then the shield jack 5 is held in a state where the jack end portion of the shield jack 5 is in contact with the side portion of the segment 6.
Is extended and the shield machine 1 excavates.

However, in the shield machine 1 described above, the shield machine 1 may roll in the circumferential direction due to the force in the circumferential direction via the cutter 4 during the excavation. Therefore,
When the shield machine 1 rolls, the earth and sand inlets and outlets of the screw conveyor 7 deviate from above and below and become slanted, which makes it difficult to take in the earth and sand S from the inlets and the outlets. The earth and sand S discharged from the spilled around the belt conveyor 9 without being supplied to the belt conveyor 9, and the earth and sand S cannot be discharged. Therefore, when the shield machine 1 rolls, it is necessary to correct it to the original position.

The method of correcting the rolled shield machine 1 to the original position (hereinafter referred to as rolling correction) is as follows: i) The cutter frame 3 shown in FIG.
Rotating in the same direction as the rolling direction of No. 2 and correcting the rolling by utilizing the excavation reaction force acting on the cutter 4, ii) As shown in FIGS. 5 and 6, the stabilizer 10 is provided from the side of the shield frame 2. Stabilizer 10 when projecting and driving into the natural ground and advancing the shield machine 1
A method for rolling correction from the component force in the circumferential direction of the shield machine 1 that acts on iii) iii) As shown in FIGS. 7 and 8, the tip of the main body 5a of the shield jack 5 is formed into a spherical shape, and the spherical shaped portion Sphere seat with the shield set to the frame 11 to which the shield frame 2 is fixed
A long hole 14 extending horizontally in the circumferential direction with respect to the tunnel cross section of the shield machine is provided in a positioning plate 13 fixed to the main body 5a in contact with 12, and a hole provided in a frame 15 fixed to the shield frame 2. The shield jack 5 is framed through the positioning plate 13 by fastening bolts to the slot 16 and the slot 14.
When the shield machine rolls, the bolts are loosened and the positioning plate 13 is moved so that the shield jack 5, rod 5b seat 17 pin connecting side to the spherical seat 12 abuts. There is a method of inclining in the same direction as the rolling direction of the shield machine and centering at the center of the shield machine, and correcting the rolling by the circumferential component force of the shield jack 5 when the shield machine excavates.

[Problems to be solved by the invention] However, among the rolling correction methods described above, in the case of the method i), when the cutting ground is soft ground, the reaction force does not act on the cutter 4 shown in FIG. There is a problem that the correction cannot be performed, and in the method of ii), the stabilizer 10 shown in FIGS. 5 and 6 must be driven into the ground from inside the shield frame 2 every time rolling correction is performed. For this reason, the work is complicated and inefficient, and since the stabilizer 10 is penetrated through the shield frame 2, there is a risk that earth and sand, water, etc. may leak into the shield frame 2 through the gap. Furthermore, since the stabilizer 10 becomes a resistance at the time of tunnel excavation, a large excavation force is required, and further, there is a problem that the stabilizer 10 disturbs the natural ground during the shield excavation, iii) In the method, since the work of when to change the slope of the shield jack 5 workers had done manually in the field, there was a work is a problem that it is bad messy and efficiency.

In view of the above-mentioned situation, the present invention enables the rolling correction of the shield machine even when the ground is soft, and does not require extra force other than the excavation force at the time of rolling correction, and earth and sand, water, etc. are in the shield frame. The purpose of this is to prevent intrusion and disturbance of the ground, and to eliminate the need for workers to perform rolling correction operations on site.

[Means for Solving the Problems] The present invention provides a plurality of shield jacks each having a seat capable of abutting against a segment assembled in a tunnel at a rear end of a rod so that an axis thereof is substantially parallel to a shield frame axis. Arranged at required intervals in the circumferential direction inside the shield frame,
In a shield excavator capable of excavating by extending the shield jack by supporting the seat by a segment installed at the rear of the shield frame, the middle of the shield jack main body on the segment side from the tip end in the excavation direction of the main body. The shield frame is supported by a frame of the shield frame so as to be able to swing in the circumferential direction of the shield frame via a pin extending in the radial direction of the shield frame, and the frame of the shield frame projects toward the segment side and the shield jack The spherical seat that surrounds the main body is attached so as to be positioned closer to the segment side than the pin support portion of the shield jack, and the positioning plate is attached to the end of the shield jack main body that is closer to the segment than the spherical seat, and the positioning is performed. On the plate, a concave surface in which the surface facing the spherical seat abuts the convex surface of the spherical seat. Attach the intermediate seat with, it is provided with a plurality of tilting jack for each intermediate seat frame of the shielding frame reciprocates in the circumferential direction of the shielding frame in correspondence with the intermediate seat for each intermediate seat.

[Operation] When the shield machine rolls in the circumferential direction,
A predetermined tilting jack is operated to move the intermediate seat in the rolling direction of the shield machine along a circumference of the shield frame by a predetermined amount. Therefore, the intermediate seat slides on the spherical seat, and the seat attached to the rod of the shield jack tilts around the pin 19 in the rolling direction of the shield machine. Thus, in this state, when the shield machine is advanced by the shield jack, a component force directed in the direction opposite to the rolling direction is generated in the shield jack, and this component force causes the shield machine to move in the rolling direction. Rotates in the opposite direction and the rolling correction is made.

Also, since each shield jack can be individually tilted by the tilting jack, rolling correction can be performed even if the tilting jack that tilts one of the shield jacks fails, and therefore when rolling correction is performed. Since troubles are less likely to occur, efficient work can be performed, and the shield jacks used for rolling correction can also be individually relocated, even if the shield machine is a closed type, it is shielded by the face pressure. There is no risk of the excavator retracting.

Furthermore, the body of the shield jack is supported by the frame of the shield frame via a pin in the middle of the segment side from the tip in the direction of excavation, and tilts around the pin when rolling is corrected. Even if the angle is large, the amount of movement of the seat facing the segment in the circumferential direction of the shield frame will be smaller than when tilted with the tip of the shield jack main body in the excavation direction as a reference, and each device placed inside the shield frame It is advantageous in preventing interference with.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of the present invention, in which the same reference numerals as in FIGS. 4 to 8 represent the same parts.

In a shield machine having the same configuration as the shield machine 1 shown in FIG. 4, the outer end of the rod 5b of the shield jack 5 is formed into a spherical shape, and the spherical surface of the rod 5b is formed into a spherical concave surface of the seat 17. Frame fitted and attached inside the shield frame 2
The bracket 18 is attached to 11 and the main body of the shield jack 5
A pin 19 extending in the radial direction of the shield frame 2 is fixed to one end side of the body 5a so as to be located in the middle of the segment 6 side, which is behind the tip of the body 5a in the excavation direction, and the shield jack 5 is attached via the pin 19. The shield frame 2 is supported so as to be swingable in the circumferential direction, and a convex spherical seat 20 protruding toward the segment 6 side is fixed to the frame 15 so as to surround the body 5a, and the body 5a of the shield jack 5 is secured. A positioning plate 13 fixed to the other end side is attached to an intermediate seat 21 having a concave surface portion that comes into contact with the convex surface of the spherical seat 20, and the intermediate seat 21 is slidably supported on the spherical seat 20 via the concave surface portion. Then, a tilting jack 23 having a shaft line l ₃ extending in the circumferential direction as a driving device is pivotally supported on each of the intermediate seats 21 corresponding to each of the intermediate seats 21 on the bracket 22 fixed to the frame 15 so that each of the tilting jacks 23. The rod 23a
The tip end is connected to a bracket 24 fixed to each of the intermediate seats 21 and the tilting jack 23 is operated so that the shield jack 5 can reciprocate in the circumferential direction of the shield frame 2 with the pin 19 as a reference. .

If the shield machine rolls in the circumferential direction,
In order to correct this, the intermediate seat 21 is moved in the circumferential direction of the shield frame 2 by expanding and contracting the rod 23a of the tilting jack 23. Therefore, the shield jack 5 tilts in the circumferential direction of the shield frame 2 about the pin 19 via the intermediate seat 21, and the axis l _{2 of the} shield jack 5 is rotated.
Is tilted in the circumferential direction of the shield frame 2. The direction in which the shield jack 5 is tilted is the rolling direction of the shield machine, that is, the rolling direction of the shield frame 2.

When the shield jack 5 is tilted at a predetermined angle, the rod 5b is projected to bring the seat 17 into contact with the segment 6, and the rod 5b is further projected to advance the shield machine. At this time, the force exerted on the pin 19 by the shield jack 5 is not parallel to the shield excavator axis l ₁ (see FIG. 4) but is inclined in the circumferential direction, so that it is parallel to the shield excavator axis l _1. In addition to the excavation force, a component force in the circumferential direction of the shield machine is generated, and this component force corrects the rolling of the shield machine. That is, if the axial force per shield jack 5 is F, the inclination of the shield jack 5 is θ, and the number of shield jacks 5 to be used is n, the force Fx for rolling correction generated by the shield jack 5 is Fx ＝ nF sin θ.

Since the tilting operation of the shield jack 5 when the rolling of the shield machine is corrected and the returning operation of the shield jack 5 after the rolling correction can be automatically performed by the tilting jack 23, like the case of the shield excavation,
It enables remote operation and eliminates the need for workers to perform on-site operations, which facilitates rolling correction work and improves efficiency.

Also, even if the ground is soft, the shield machine will have a circumferential force.
Since Fx can be given, rolling correction can be easily performed, and there is no protrusion to the natural ground such as a stabilizer and no extra resistance is generated during excavation, so the excavation force is small and the landform is caused by the protrusion. Is not disturbed,
Further, since there is no gap created by the protrusion penetrating the shield frame, the earth and sand, water and the like do not enter the shield machine and the safety is improved.

Each shield jack 5 can be tilted independently by the tilting jacks 23 provided correspondingly, independently of the other shield jacks 5, so that workability is good and one of the shield jacks 5 can be tilted. Even if the jack 23 cannot be tilted due to a failure or the like, the shield jack 5 in which the tilting jack 23 is not broken can be tilted, so that rolling correction can always be reliably performed, and efficient excavation can be performed.

Further, in the shield machine, when one segment 6 is excavated, the shield jack 5 is contracted to separate the seat 17 from the existing segment 6, and the existing segment 6 and the seat 17 of the shield jack 5 are separated. A new segment 6 is placed between the two, and then the shield jack 5 is extended to the newly placed segment 6
Abut the seat 17 of the so that it receives the reaction force at the time of excavation,
The so-called shield jack 5 needs to be rearranged, but since the tilting jacks 23 are provided corresponding to the respective shield jacks 5 in the present embodiment, when the shield jacks 5 used for rolling correction are rearranged respectively. As a result, the shield pressure can be supported by the other shield jack 5 when one shield jack 5 is being rearranged, so that even in the case of a sealed shield machine, the face pressure can be changed by the face pressure. Good excavation can be performed without the shield machine moving backward.

Furthermore, the main body 5a of the shield jack 5 is supported by the frame 11 of the shield frame via the pin 19 at a midway portion of the main body 5a closer to the segment 6 than the tip end in the excavation direction.
Therefore, even if the tilting angle becomes large, the shield frame circumference of the seat 17 facing the segment 6 can be compared with the case of tilting with the tip of the body 5a of the shield jack 5 as the reference in the excavation direction. The amount of movement in the direction becomes small, which is advantageous in preventing interference with each device arranged in the shield frame 2.

In addition, in the embodiment of the present invention, the case of applying to a shield machine with a cutter has been described, but it can also be used for a shield machine of hand digging, and various other within the range not departing from the gist of the invention. Of course, changes can be made.

[Effects of the Invention] As described above, the shield jack device in the shield machine of the present invention can exhibit various excellent effects as described below.

(I) Since the shield jack can be tilted remotely by the tilting jack, the remote operation is possible, and at the time of rolling correction, it is not necessary for a worker to perform work on site, and the correction work is easy and Efficiency improves.

(II) Since the force in the circumferential direction can be applied to the shield machine even when the ground is soft, rolling correction can be easily performed.

(III) Since there is no protrusion such as a stabilizer, the resistance at the time of excavation is small, the excavation force can be reduced, there is no fear that the protrusion will disturb the ground, and the protrusion penetrates the shield frame. Since there is no gap caused by this, there is no risk that earth and sand, water, etc. will enter the shield machine from the ground, improving safety.

(IV) Since each shield jack can be independently tilted independently of other shield jacks, workability is good and even if one of the shield jacks cannot tilt due to a failure of the tilting jack, etc. By tilting the shield jack, the rolling correction can be surely performed, and the excavation can be performed efficiently.

(V) Since the shield jack used for rolling correction can be rescaled independently, the shield jacks other than the shield jack undergoing the rearrangement can receive the face pressure, and thus the shield machine can be sealed. In this case, there is no fear that the shield machine will retreat due to the cutting face pressure, and good excavation can be performed.

(VI) The body of the shield jack is supported by the frame of the shield frame with a pin in the middle of the segment side from the tip of the excavation direction, and the shield jack tilts around the pin when rolling is corrected. Therefore, even if the tilting angle becomes large, the amount of movement of the seat facing the segment in the circumferential direction of the shield frame becomes smaller compared to when tilting with the tip of the shield machine side of the shield jack body as the reference. This is advantageous in preventing interference with each device arranged in the frame.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the shield jack device in the shield machine of the present invention, and FIG. 2 is a II-II of FIG.
Fig. 3 is a side view of an ordinary shield machine, Fig. 5 is a side view of the shield machine, and Fig. 5 is a case where the stabilizer is used for rolling correction of the shield machine. FIG. 6 is a perspective view of the shield machine, FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 5, FIG. 7 is a side view when the rolling correction of the shield machine is performed by a shield jack, and FIG.
It is a VIII-VIII direction arrow view of a figure. In the figure, 1 is a shield machine, 2 is a shield frame, 5 is a shield jack, 5a is a main body, 5b is a rod, 6 is a segment, 11 is a frame, 13 is a positioning plate, 15 is a frame, 17 is a seat, and 19 is a pin. , 20 is a spherical seat, 21 is an intermediate seat, 23 is a jack for tilting,
S indicates earth and sand, and l ₁ and l ₂ indicate axis lines.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 999999999 Otoyo Construction Co., Ltd. 1-24-4 Shinkawa, Chuo-ku, Tokyo (71) Applicant 999999999 Hitachi Construction Machinery Co., Ltd. 2-6-2 Otemachi, Chiyoda-ku, Tokyo (72) Inventor Ryuzaburo Otsuka 13 Showa-cho, Minato-ku, Aichi Prefecture Ishikawajima Harima Heavy Industries Co., Ltd.Nagoya Plant (72) Inventor Shusuke Mizuno 13 Showa-cho, Minato-ku, Nagoya City Aichi Prefecture (56) References Jitsuko Sho 49-827 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A plurality of shield jacks, each having a seat at a rear end of a rod capable of abutting against a segment assembled in a tunnel, are arranged in a circumferential direction in a shield frame so that an axis thereof is substantially parallel to a shield frame axis. Arranged at intervals,
In a shield excavator capable of excavating by extending the shield jack by supporting the seat by a segment installed at the rear of the shield frame, the middle of the shield jack main body on the segment side from the tip end in the excavation direction of the main body. The shield frame is supported by a frame of the shield frame so as to swing in the circumferential direction of the shield frame via a pin extending in the radial direction of the shield frame, and protrudes toward the segment side of the frame of the shield frame and the body of the shield jack. Is attached so as to be located closer to the segment side than the pin support portion of the shield jack, and a positioning plate is attached to the end of the main body of the shield jack that is closer to the segment than the spherical seat.
An intermediate seat having a concave surface portion whose surface facing the spherical seat abuts the convex surface of the spherical seat is attached to the positioning plate, and a plurality of tilts for reciprocating the intermediate seats in the shield frame frame in the circumferential direction of the shield frame. A shield jack device in a shield machine, wherein a jack for use is provided for each intermediate seat corresponding to each intermediate seat.