JP3280713B2 - Segment feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment supply device for supplying a segment to an erector in a shield method.

[0002]

2. Description of the Related Art Generally, a shield construction method such as a pressurized muddy water method includes the following:
As shown in FIG. 6, a segment c is erected by an erector b on the inner surface of a borehole excavated by a shield machine a to construct an inner wall of a tunnel. When supplying the segment c to the erector b, the excavator a
After excavating one ring of the segment c, the segment c carried by the bogie d from the tunnel entrance is transferred to the rear part of the excavator a by the hoist e moving along the beam g, and Is pushed out toward the erector b by the supply device f provided in the erector b.

[0003]

However, in the above-mentioned conventional segment supply system, the segments c on the carriage d are suspended by the hoist e and the supply devices f one by one.
So that, for example, one ring 6
In the case of the piece segment c, the hoist e must be reciprocated six times between the carriage d and the supply device f, and there is a problem that it takes a long time to supply the segment c to the hoist e. .

[0004] In order to solve the above-mentioned problems, the present inventors have proposed a conveyor in which a segment for one ring is placed in advance, and after excavation is completed, the segments are sequentially transferred to an erecta. A new system has been developed that automatically supplies segments by means of a hoist that carries in the car. However, in this new system, when excavating a curved section of the tunnel, a gap may occur between the longitudinal direction of the conveyor and the running track of the hoist, which may make it difficult to load the segments.

In view of the above circumstances, the present invention has been devised in order to provide a segment supply apparatus capable of shortening a segment supply time and supplying a segment smoothly even in a curved section.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a conveyor which is connected to a shield machine and places segments for one ring and sequentially passes these segments to an erector. A beam extending backward along the axis, and a hoist that reciprocates according to the beam and carries the segment to the rear end side of the conveyor,
And a centering mechanism for moving the conveyor in the left-right direction to adjust the relative position with respect to the beam.

[0007]

According to the above construction, the hoist carries the segment to the rear end side of the conveyor, and during the excavation of the shield excavator,
Load one ring of segments. After the excavator has excavated one ring, the conveyor will sequentially supply the segments from the tip end to the erector. The centering mechanism is
In the excavation of a curved section or the like, when the segment receiving position of the conveyor deviates from the segment loading position of the hoist determined by the beam, the conveyer is moved in the left-right direction to correct the stacking position.

[0008]

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

FIG. 1 and FIG. 2 show an embodiment of a segment supply apparatus according to the present invention. The segment feeder includes a conveyor 51 connected to the shield machine 1 and sequentially passing the segments 3 to the erector 4, a hoist beam 26 having a tip 26a supported by the shield machine 1, and a reciprocating motion according to the hoist beam 26. And a centering jack 25 serving as a centering mechanism for appropriately moving the conveyor 51 in the left-right direction.

The shield machine 1 includes a cylindrical outer shell 52.
And a cutter 54 provided with a bit 53 at the front end of the outer shell 52, and a rear frame 55 extending rearward is provided in the outer shell 52. Elekta 4
Are attached to the rear frame 55 and are formed so that the grasped segment 3 is moved to a predetermined assembling position and assembled.

The conveyor 51 is provided behind the erector 4 and has a ladder frame-shaped segment mounting table 9 on which the segments 3 for one ring are mounted, and the segments 3 on the segment mounting table 9 are appropriately moved to the distal end side. , And the segment mounting table 9 is held by a support base (conveyor guide frame) 17 formed in a U-shape in plan view. As shown in FIG. 4, the support pedestal 17 has its left and right portions 23 raised upward and connected to the rear deck 1 a of the shield machine 1 via pins 24. That is, it is towed by the excavator 1 and moves forward with the excavation.

In this embodiment, as shown in FIGS. 3 and 4, one ring is composed of six pieces of segments 3, so that six segments 3 are placed on the segment mounting table 9.
Will be placed. These segments 3 include three A segments 3a assembled first, two B segments 3b assembled on both sides thereof, and one K segment 3k assembled last.
The segment mounting table 9 is provided with first to sixth mounting portions 10 to 15 in order from the front, and these are mounted on the A segment 3a, the B segment 3b, and the K segment 3k, respectively. I have.

A roller 21 is provided at the bottom of the segment mounting table 9 so that the roller 21 can move in the axial direction on the base plate 16 laid on the segment 3 at the bottom of the tunnel. The base plate 16 is formed as a rectangular plate slightly larger than the segment mounting table 9, and is formed into a curve in accordance with the curved surface of the segment 3. The base plate 16 is supported by a support frame 17 together with the segment mounting table 9, and a base plate slide jack 18 for sliding the base plate 16 in the axial direction is provided between the support frame 17 and the base plate 16.
Is provided. At the time of this sliding, both sides of the base plate 16 are guided to the inner surface of the support base 17. A conveyor slide jack 19 is provided between the support base 17 and the rear end of the segment mount 9 to slide the segment mount 9 in the axial direction. The guide roller 20 is guided by a guide roller 20.

The segment mounting table 9 is provided with a lifting / lowering jack 22 which projects downward and abuts the bottom segment 3 to raise the segment mounting table 9. The lifting jacks 22 are mounted on both sides of the front end and the rear end of the segment mounting table 9 at positions avoiding the base plate 16 respectively. Therefore, when the lifting jack 22 is extended, the segment mounting table 9 floats from the base plate 16, so that no load is applied to the base plate 16 and the base plate slide jack 18 can be easily moved forward by extension. Become.

The transfer carriage 35 is incorporated in the center of the segment mounting table 9 and has two rails 3 provided in the axial direction.
By moving along the segment 6, the segment 3 on the segment mounting table 9 is appropriately moved forward. A motor 38 is attached to the transfer trolley 35, meshes with a chain 39 fixed along the axial direction, and causes the transfer trolley 35 to run by its rotational force. The transport carriage 35 is provided with a jack (not shown), and the extension thereof lifts the segment 3 on the receivers 10 to 15. In other words, the transfer carriage 35 can sequentially transfer the loaded segments 3 to the distal end side of the segment mounting table 9 by the expansion and contraction of the jack and the traveling movement.

The hoist beam 26 has a tip 26a pivotally supported by a rear deck 1a of the shield machine 1 and a rear end 26b supported by a trailing truck 27 following the conveyor 51 (see FIG. 3). . Trailing bogie 27
Is designed to run on rails 29 which are sequentially extended along a tunnel axis on a horizontal member 28 bridged over the bottom of the tunnel. The trailing bogie 27 and the rear deck 1a of the excavator 1 are connected by a rope (not shown), and are towed according to the excavation of the shield excavator 1.

A rail 31 for a segment truck 30 is arranged in parallel with the trailing truck rail 29 so that the segment truck 30 on which the segment 3 is mounted runs on the rail 31. Has become. The segment carts 30 are arranged such that the segments 3 are placed one on top of the other in the order of assembly. In the present embodiment, the segments are transported by two carts 30, and the three carts 30 are assembled first on the leading cart 30a. A segment 3a is placed, and two B segments 3b are placed on the next carriage 30b,
The K segment 3k to be assembled last is mounted thereon.

The hoist 32 is configured to run by the rotation of the wheel 56 engaged with the hoist beam 26, lifts the segment 3 on the segment truck 30, moves to the front of the tunnel, and moves the segment mounting table 9 to the rear end side. Are loaded into the receivers 14 and 15. The hoist 32 includes a hoisting drum 33 for lifting and lowering, and a gripper 57 that grips the segment 3 and rotates 90 degrees around a vertical axis by a turning motor (not shown). Therefore, the segment 3, which has been moved to the lower position (P) above the segment mounting table 9 by the hoist 32, is turned 90 degrees by the rotation of the grip 57, and is mounted on the rear portion of the segment mounting table 9. Will be. Of the segments 3, the K segment 3k is mounted on the sixth mounting portion 15 at the rear end of the segment mounting table 9, and the other A segments 3a and B segments 3b are carried into the fifth mounting portion 14 in front of the segment. You. Guides 34 for guiding the segments 3 to be unloaded are provided on the mounting portions 14 and 15. The guide 34 is formed on the support base 17, and MC nylon is attached to the surface thereof.

The centering jack 25 is mounted on the support base 1.
7 and extend in the radial direction of the tunnel so as to abut the existing segment 3. In the present embodiment, two parallel cylinders (digitally provided) are provided at a total of four locations, one set in the front and rear at an interval in the axial direction, the base end of which is pivotally supported by the support base 17. (Servo cylinder) 58 and a contact member 59 spanned between the ends of the telescopic rods. The contact member 59 is pressed against the segment 3 by the extension of the telescopic rod, and the support base 17 Are appropriately moved in the left-right direction to perform centering.

That is, as shown in FIG.
Is connected to the excavator 1 at the front end thereof and is free at the rear end, but its center (center in the width direction) is substantially coincident with the axis 60 (the extension line thereof) of the excavator 1. On the other hand, the tip portion 26a of the hoist beam 26 is
a (support point R in the figure), and the rear end portion 26b is supported by the trailing bogie 27 that follows and moves along the tunnel axis 61 (support point Q). Will be done. Therefore, when constructing the tunnel curve section as shown in the figure, the excavator shaft (6
0) and the tunnel shaft 61 do not coincide with each other and obliquely intersect. Therefore, the position of the fifth receiving portion 14 or the sixth receiving portion 15 which is the segment receiving point of the conveyor 51 and the hoist beam 26 Is separated from the hoist lowering position (P), which is closer to the position (R) of the distal end portion 26a, in the left-right direction. In order to adjust the deviation S generated here,
The conveyor 51 is moved by the centering jack 25. The operation of the centering jack 25 is controlled based on detection of a laser sensor (not shown) provided on the conveyor 51 or the trailing carriage 27.

Next, the operation of this embodiment will be described.

When excavating with the shield excavator 1 equipped with the segment supply device of the present invention, first, the segment truck 30 on which the segments 3 are mounted is moved from the tunnel entrance to a predetermined point in the succeeding truck 27. Three A segments 3a to be assembled first are placed on the leading segment truck 30a, and two B segments 3b and K segments 3k are placed on the next truck 30b.

Next, the holding portion 57 of the hoist 32 holds the A segment 3a on the segment truck 30a, moves forward along the hoist beam 26, and moves above the fifth mounting portion 14 of the segment mounting table 9. Stop at Then, after turning 90 degrees, the grip portion 57 is unwound, and the segment 3
a is loaded. The transported segment 3a is transported forward by the transport trolley 35, and is reloaded on the first receiver 10. This operation is performed in the same manner for the three A segments 3a placed on the leading segment truck 30a, and the first segment 10 to the third stage 12 of the segment stage 9 are provided with the A segments respectively. 3a is placed.
Thereafter, the K segment 3k placed on the next segment carriage 30b is gripped and transferred by the hoist 32, and placed on the sixth placement portion 15 of the segment placement table 9. This K segment 3k is mounted on the sixth mounting portion 15 as it is. Next, the B segment 3b of the segment truck 30b is transferred by the hoist 32, is placed on the fifth placement portion 14 of the segment placement table 9, and is sequentially sent forward by the transfer truck 35. As a result, each of the first mounting portion 10 to the sixth mounting portion 15 of the segment mounting table 9 has three A
A segment 3a, two B segments 3b, and one K segment 3k are placed.

Thereafter, when the shield machine 1 completes the excavation for one ring, the automatic supply of segments to the erector 4 is started. First, the lifting jack 22 of the segment mounting table 9 is extended downward to make the segment mounting table 9 float on the base plate 16. Next, the base plate slide jack 18 is extended, and the base plate 16 is moved forward to cover the portion excavated by one ring. Next, the lifting jack 22 is shortened, and the segment mounting table 9 is mounted on the base plate 16. In this state, the conveyor slide jack 19 is extended, and the segment mounting table 9 is moved to the erector 4 side. Thus, the first mounting portion 10 which is the tip of the segment mounting table 9 enters below the erector 4, and the mounted segment 3 a is gripped by the erector 4. Here, the lifting jack 2 of the segment mounting table 9
2, the segment mounting table 9 is separated from the base plate 16, the base plate slide jack 18 is retracted, and the base plate 16 is retracted. As a result, the excavated portion at the bottom of the tunnel covered by the base plate 16 is opened. Then, the segment 3a gripped by the erector 4 is built in the opened excavation completed portion (the bottom of the tunnel).

Next, the lifting jack 2 of the segment mounting table 9
2 and the base plate slide jack 18 are operated in the same manner, and the base plate 16 is again moved to the erector side to cover the segment 3a at the bottom of the built tunnel. Thereafter, the base plate 16 remains in this state during the assembly of one ring of the segment 3. Then, the segment 3 mounted on the second mounting portion 11 of the segment mounting table 9
a is transferred to the first receiver 10 by the transfer cart 35. Subsequently, the conveyor slide jack 19 is extended, the segment mounting table 9 slides forward on the base plate 16, and the segment 3 a of the first mounting portion 10 that has been replaced is gripped by the erector 4.

Thereafter, this operation is repeated so that first three A segments 3a are supplied to the erector 4,
The B segments 3b are supplied, and finally the K segments 3k are supplied. The erector 4 sequentially assembles one ring of segments.

If the axis 60 of the shield machine 1 does not coincide with the tunnel axis 61, for example, when excavating a curved section, the conveyor 51 and the hoist beam 26 are displaced, and the hoist 32 is lowered. A radial deviation S occurs between (P) and the center of the mounting portion 14 (15) for receiving the segment 3, but each centering jack 2
5 expands and contracts appropriately, thereby moving the conveyor 51 via the support base 17 by an amount corresponding to the shift S, and as shown in FIG. 5, the center of the mounting portion 14 (15) and the lowering position (P ) To match. Note that the deviation S does not need to be set to 0, but only needs to be as close to 0 as possible. This is because it is necessary to consider the adjustment of the deviation between the tunnel center and the conveyor center. Thus, even during the construction of the curved section, the segment 3 is automatically carried into the conveyor 51 without any trouble, and is transferred to the erector 4.

Depending on the curvature of the tunnel, if the posture corrected for carrying in the segment 3 is maintained, when the conveyor 51 advances, the planar position between the tip (the first mounting portion 10) and the erector 4 is increased. May be significantly different, so all the segments 3
After loading, the centering jack 25 may be operated again to return the conveyor 51 to the posture coinciding with the axis 60 of the excavator 1. The centering jack 25 is used to adjust the position of the conveyor 51,
It is assumed that the cylinder 58 is shortened so as not to hinder the excavation.

As described above, during the excavation of the shield excavator 1, the segments 3 for one ring are previously placed on the segment mounting table 9.
Are placed in the assembling order, and when the excavator 1 excavates one ring, these segments 3 are sequentially transferred forward by the conveyor slide jack 19 and the transfer carriage 35 and supplied to the erector 4. The time for supplying the segment 3 to the segment 4 can be substantially shortened, and the segment 3 can be quickly assembled with almost no play of the erector 4, so that the construction time of the tunnel lining can be greatly reduced.

Further, since the centering jack 25 is provided on the conveyor 51 so that the rear side of the conveyor 51 matches the hoist beam 26, the segment 3 can be automatically carried in by the hoist 4 even in the construction of a curved section. Segment loading from the carriage 30 to the conveyor 51 can be performed smoothly.

In this embodiment, the conveyor 51 is composed of a combination of the segment mounting table 9 and the transfer carriage 35. In addition, for example, a mechanism for transferring the segments forward by a circulating mounting table is used. , Segments may be placed and transported. The centering mechanism of the conveyor is not limited to the illustrated cylinders, and the installation position and the number of installations are appropriately selected depending on construction conditions, the length of the conveyor, and the like.

[0032]

In summary, according to the present invention, the following excellent effects are exhibited.

A conveyor on which the segments are placed and sequentially passed to the erecta, a beam extending rearward substantially along the tunnel axis, a hoist for reciprocating and carrying the segments to the conveyor according to the beam, and moving the conveyor in the left-right direction. Since the centering mechanism is provided, the time for supplying the segments to the erector can be shortened, and the segments can be supplied smoothly even during the construction of a curved section or the like.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing one embodiment of a segment supply device according to the present invention.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 1;

FIG. 5 is a schematic plan view for explaining the operation of the present invention.

FIG. 6 is a side sectional view showing a conventional segment supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield excavator 3 segment 4 Elekta 25 Centering jack (centering mechanism) 26 Hoist beam (beam) 32 Hoist 51 Conveyor

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideki Hagiwara 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Takashi Wagami 111-1 Kitahama-cho, Chita City, Aichi Prefecture Ishikawajima Hari (72) Inventor Shigeo Fujii 11-1 Kitahama-cho, Chita-shi, Aichi Prefecture Ishikawajima-Hari Maichi Heavy Industries, Ltd. Aichi Factory (56) References JP-A-5-179898 (JP, A) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (1)

(57) [Claims] 1. A conveyor connected to a shield excavator for mounting segments for one ring and sequentially passing the segments to an erector, and a tip end portion supported by the shield excavator and extending rearward substantially along a tunnel axis. A beam, a hoist that reciprocates according to the beam and carries a segment to the rear end of the conveyor, and a centering mechanism that moves the conveyor in the left-right direction to adjust the left-right relative position of the beam , The conveyor and its side
Extend the jack provided between the
The conveyor is moved by the pressing reaction force at this time
A segment supply device comprising a centering mechanism .