JP2960990B2 - Electa device of shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an erector device for a shield excavator.

[0002]

2. Description of the Related Art Referring to FIGS. 7, 8 and 9, a conventional shield digging machine will be described with reference to FIGS. The turning ring c is a turning hydraulic motor for turning the turning ring b.
Two segment piece lifting / sliding devices d are mounted.

FIGS. 7 and 9 show the details of the segment lifting / sliding device d. n, o, and r are fixed pins, p, q, and s are moving pins, and n, o, p, and q are parallelogram points. Also, r and s are the lengths of the hydraulic jack contraction state and r and s' are the lengths of the hydraulic jack expansion and contraction state. In FIG. 9, when s is in the s' state, n, o,
Since p and q are points of the parallelogram, p and q are p ′,
At q ', the segment gripper moves up and down.

FIG. 7 shows a screw handle i. When the screw handle i is rotated, a nut j screwed to the screw rod of the screw handle i moves, and the segment gripping portion slides in the axial direction. FIG. 7e shows an existing segment ring assembled in a circular shape. In front of this existing segment ring e (to the left in FIG. 7),
Assemble the new segment ring.

[0005] At that time, the segment lifting / sliding device d for the new segment pieces k, k, k, m,
8 are successively carried into the position shown in FIG. 8, set, connected and fixed to each other, and finally, the new segment piece 1 is used for the segment as in the case of each of the new segment pieces k, k, k, m, m. the lifting slide device d, gripping, turning in the arrow g ₁ direction or the arrow g ₂ direction in FIG. 8, new segment pieces m, moving in opposite positions between the m, then push the arrow g ₃ directions, The new segment pieces m, m are connected and fixed to complete the new segment ring.

When the new segment ring is completed, the shield jack h provided on the shield excavator body a is provided.
Is applied to the new segment ring, and then the shield jack h is operated in the direction of extension, so that the shield excavator body a
To excavate. At the time of this excavation, it is not possible to assemble the next new segment ring, and the worker is to perform chores or take a break.

[0007] In the segment standard of the segment association, a segment piece k whose both cross sections are in the center direction is called an A-type segment, and the angle of both cross sections of the pieces is θ.
The segment piece 1 of (90 ° + α) is called a K-shaped segment. This segment piece 1 can be pushed into the space between the pieces from the center. A segment piece m having a shape adjacent to the segment piece is called a B-shaped segment.

[0008]

In the conventional shielded excavator erector device shown in FIGS. 7, 8 and 9, it is not possible to assemble the next new segment ring until the excavation work is completed. The reason is that, while the shield excavator is excavating (operating in the extension direction of the shield jack h), the segment lifting / sliding device d brings the newly-installed segment piece to the assembly position, and this impinges on the shield jack h. This is because the shield jack h is damaged by the contact. For this reason, excavation and assembly of the new segment piece are performed separately so as not to overlap in time.

When the segment ring is divided into six parts in the circumferential direction, the following series of operations is performed, that is, the swivel ring b is swung to move the segment elevating / sliding device d downward, and then to the elector device. 1 brought in near
Grasp the two new segment pieces, then lift them up,
Then, the swivel ring b is swiveled, and the elevating / sliding device d for the segment is moved in the circumferential direction. When the device is moved to the assembling position, the new segment piece is slid and set, and then the new segment piece is opened. Next, a series of operations of turning the turning ring b and moving the lifting / sliding device for segment d downward again must be performed six times.

The present invention has been made in view of the above problems, and has as its object to provide an erector device of a shielded excavator capable of reducing a cycle time.

[0011]

In order to achieve the above object, the present invention provides a shield excavator erector device comprising: a swivel ring pivotally mounted in a shield excavator body;
A section that is attached to the swing ring to form a segment ring
Segments for the same number of segment pieces
And a ride device, lifting slide device for these segments, the existing segment phosphorus in the shield excavator excavation
Gripping and suspending all new segment pieces
Lift up and wait, shrink after excavation is completed, and
All the pieces are transported to the assembly position and
Structured to move outward and outward to a predetermined position and assemble
It is characterized by having done.

[0012]

The erector device of the shielded excavator according to the present invention is configured as described above. When assembling the segments, first, the lifting / sliding device for each segment is extended into the existing segment ring, and each segment grasps the segment piece.
Hold and lift. At this time, lift and slide
The number of guide devices is the same as the number of segment pieces.
The new setting required to form a new segment ring
Holds all the segment pieces and waits at a predetermined position
You. Perform this work while the shield excavator is
When the excavator has completed the excavation,
Shrink the slide device and slide it out of the existing segment ring.
To the excavation direction,
Move to the specified position radially outward, and grasp each new
Set the segment pieces in place and assemble them.
Can be.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an explanation will be given of an embodiment of an erector device for a shield excavator according to the present invention with reference to FIGS.
6 is a shield excavator body, FIGS. 4 and 5 are swing rings that are rotatably mounted in the shield excavator body 1, and 3 is a swing hydraulic motor for swinging the swing ring 2. As shown in FIGS. 1 to 3,
The same number of new segment pieces 12 and 14 (
Elevating / sliding device 4 for segments)
Have been. The new segment pieces 12 and 14 are
This is a shape with a divided segment ring.
The segment ring is shaped by positioning and assembling
Is done.

The segment lifting / sliding device 4 has a long stroke extending into the existing segment ring 5, and holds and lifts a new segment piece in the existing segment ring 5.
Next, the operation of the erector device of the shield excavator shown in FIGS. 1 to 6 will be described. In the case of FIGS. 1-3, 12 is a K-shaped segment piece, and there are three pieces. Reference numeral 14 denotes a segment piece having a shape adjacent to the segment piece 12, which also has three pieces. The segment piece 14 is set at a predetermined position before the segment piece 12. That is, when assembling the segment ring, first, the lifting / sliding device 4 for each segment is extended into the existing segment ring 5 as shown in FIG.
The segment pieces 12, 14 are gripped and lifted. This work is performed while the shield excavator is excavating.

The lifting / sliding device 4 for each segment includes:
New segment pieces 12, 14 were gripped and lifted
When the shield excavator has completed the excavation,
Reduce the shield jack 8 as shown in 5
, And are transported in the excavation direction. In this way the new Seg
All the pieces 12 and 14 are moved to the assembly position.
After turning the three segment pieces 14 radially outward
And set it at a predetermined position. Next, the three segment pieces (K-shaped segments) 12 are directed radially outward.
, And pushed between the segment pieces 14 as shown in FIG.

FIG. 6 shows a segment piece (A-type segment) 11 in which both cross sections of the piece are in the center direction, and a segment piece (K) in which the cross section angle of both pieces is θ (90 ° + α).
The drawing order of a segment segment (mold segment) 12 and a segment piece (B-type segment) 13 having a shape adjacent to the segment piece 12 is shown.

[0017]

As described above, when assembling the segment ring, the elevating / sliding device for each segment is first extended into the existing segment ring to form a new segment ring.
To grasp the total number of segment pieces required for
And lift it. This work is being done while the shield excavator is
And wait while the segment piece is gripped and lifted.
To work. And when the excavation of the shield excavator is completed,
Reduce the lifting / sliding device for each segment to reduce the
Slide it out of the ment ring to create the new segment piece.
All the pieces to the assembly position, and
Move the piece outward in the radial direction to secure it in place.
Since Tsu door, it can shorten the cycle time.

That is, generally, the excavation cycle of one segment ring is about 70 minutes. The details are excavation and excavation 30 minutes, segment assembly 30 minutes, and miscellaneous work time 10 minutes. Of these, the assembly time of the segment is turning, gripping 1 minute × 6 pieces, turning to a predetermined position, pressing 1 minute × 6 pieces, bolt fastening 3 minutes × 6 pieces, that is, (1 minute × 6) + (1 minute) × 6)
+ (3 minutes × 6) = 30 minutes. Of these, only the bolt fastening time is the time that cannot be eliminated by the present invention (1 minute + 1 minute)
× 6 = 12 minutes is the lap time for excavation and advancement, and the cycle time can be reduced by 12% / 70 minutes = 17%.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of an erector device of a shield excavator according to the present invention.

FIG. 2 is a vertical sectional front view of the erector device of the shield excavator when a segment piece is gripped.

FIG. 3 is a vertical sectional front view of the erector device of the shield excavator when a segment piece is set.

FIG. 4 is a vertical sectional side view of the erector device of the shield excavator when the segment piece is gripped.

FIG. 5 is a vertical sectional side view of the erector device of the shield excavator when a segment piece is set.

FIG. 6 is an explanatory diagram showing the lifting order of the A-type segment, the K-type segment, and the B-type segment, and the arrangement order.

FIG. 7 is a vertical sectional side view showing an erector device of a conventional shield excavator.

FIG. 8 is a front view thereof.

FIG. 9 is an explanatory diagram of the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield excavator main body 2 Revolving ring 4 Segment lifting / sliding device 5 Existing segment 12 New segment piece 14 〃

────────────────────────────────────────────────── ─── Continuing from the front page Examiner Akiko Kusano (56) References JP-A-4-161592 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 11/40

Claims (1)

(57) [Claims] A swivel ring rotatably mounted in a shielded excavator body and a segment mounted on the swivel ring.
The same number of sections as the segment pieces that form the ring
And a segment for lifting-sliding device, for those segments lifting slide apparatus, in the shield excavator excavation
It extends into the existing segment ring and
Hold and lift the entire number of
Convey all the new segment pieces to the assembly position
And move it radially outward to a predetermined position.
An erector device for a shield excavator, wherein the erector device is configured to be assembled .