JP2606958B2 - Segment assembly equipment for shield machine - Google Patents

Description

The present invention relates to a segment assembling apparatus for a shield machine.

《Background of the Invention》 As is well known, there is a shield construction method as a tunnel construction method, and as one type of this kind of construction method, the ground is excavated with a shield excavator while moving forward, and with the advance, the shield excavator is used. There is a method of sequentially assembling the segments in a ring shape on the rear side for sequentially taking the excavation reaction force.

In a shield machine used in such a shield construction method, an erector device for assembling a segment on the rear side has conventionally been incorporated in the shield machine.

However, in such a structure in which the shield machine has the built-in erector device, when the shield machine receives an extremely large external force, the outer diameter thereof is deformed, and the slewing mechanism of the erector device that grips and turns the segment. There was a technical problem that the operation of the device became difficult.

For this reason, for example, Japanese Patent Application Laid-Open No. 1-263391 proposes a structure in which a turning mechanism of an erector device is supported via an intermediate ring smaller than a ring gutter provided in a shield machine.

According to the segment assembling device disclosed in this publication, even if the ring gutter is deformed by an external force, the influence does not extend to the intermediate ring, so that the turning obstruction of the turning mechanism is avoided. The assembling apparatus disclosed in the official gazette has the following technical problems.

<< Problems to be Solved by the Invention >> That is, this type of assembling device which has been proposed or provided so far, including the segment assembling device disclosed in the above publication, is integrated with the shield machine. Therefore, the assembling device also moves with the advance of the shield machine.

For this reason, generally, when assembling the segments, the work is performed in a state where the excavation of the shield excavator is stopped, and the excavation efficiency is reduced.

In this case, by detecting the moving speed of the shield machine and controlling the segment assembling apparatus, it is possible to assemble the segments without stopping the excavation of the shield machine. Then, the structure and control of the segment assembling device become complicated.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to improve the excavation efficiency of a shield excavator without complicating the configuration and control. An object of the present invention is to provide an excavator segment assembling apparatus.

<< Means for Solving the Problems >> In order to achieve the above object, the present invention relates to a segment assembling apparatus for sequentially assembling segments in a rear end portion in an annular manner with the excavation of a shield excavator; Supported from the existing segment located at the rear of the machine, and a stand installed separately from the shield machine, a pitching and yawing frame supported by the stand, and a frame supported by the frame. It is characterized by comprising a turning mechanism and a gripping mechanism supported by the turning mechanism and gripping the segment supplied from below the gantry.

The pedestal may be configured to be movable on the existing segment in the tunnel axial direction.

<< Operation >> According to the segment assembling device of the shield machine described above, since the mechanism for gripping the segment and the turning mechanism are supported on the stand provided separately and separately from the shield machine, the shield The segments can be assembled separately from the excavation work of the excavator.

In addition, even when the assembling work of the segments is performed simultaneously with the excavation of the shield, such assembling work can be performed independently of the excavation of the shield. Even when the relative relationship between the existing segments changes, it is possible to carry out the assembly work of the segments without being affected by the change, and to easily cope with the construction of the curved portion.

Embodiment Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show an embodiment of a segment assembling apparatus of a shield machine according to the present invention.

The assembling apparatus shown in FIG. 1 includes a pedestal 10 which is installed adjacent to a rear side of an unillustrated shield machine located in the front left of FIG. 1 in a state of being separated therefrom, and a pitching device supported by the pedestal 10. And yawing frames 12, 14, a turning mechanism 16 supported by these frames 12, 14, and a segment gripping mechanism 18 supported by the turning mechanism 16.

In FIG. 1, a segment indicated by reference numeral 19 is a segment, and a segment 19 indicated by a solid line in FIG. 1 is an existing one already installed, and a segment indicated by a virtual line at the left end in FIG. Installed with the assembly device of the invention.

The gantry 10 is provided with a support beam 20 installed in the tunnel axial direction, a reaction force support leg 22 arranged at an intermediate position of the support beam 20, and a front and rear space on the reaction force support leg 22. It has a pair of front and rear fixed support legs 24, 26, and these support legs 22, 24, 26 are each formed in a cross-girder shape.

As shown in FIG.
A pair of rollers 22a for supporting roller contact members 20a arranged above and below, and a bracket 22b for supporting the rollers 22a
The bracket 22b is protruded on the side surface, and a pair of columns 22c, both ends of which are installed and contracted on both sides of the support beam 20, and an arch-shaped support pivotally mounted between the upper ends of the columns 22c. 22d, a pair of fixed shoes 22e pivotally attached to the lower ends of the columns 22c, respectively, and abutting on the existing segments 19, and a connecting frame 22f connecting the fixed shoes 22e. .

As shown in FIG. 1, a pair of movable jacks 30 are provided on the side of the support beam 20 between the reaction force support leg 22 and the support beam 20 configured as described above.

On the other hand, as shown in FIG. 3, the front fixed support leg 24 is composed of a pair of columns 24a which can be extended and contracted at both ends connected to the support beam 20 by pins 32, and an arch pivotally connected between the upper ends of the columns 24a. Form support 24b, fixed shoe 24c pivotally attached to the lower end of each column 24a, and connecting frame 24 connecting fixed shoes 24c.
d, and extendable side supports 24e protruding from the side surfaces of the columns 24a.

Further, rollers 34 shown in FIG. 5 are provided before and after each fixed shoe 24c of the front fixed support leg 24.

The roller 34 has a cylindrical portion 36a on which the fixed shoe 24c is fitted.
And a pair of guide cylinders 36b provided in front and rear thereof so as to sandwich it, and are supported by a roller holding member 36, and in each guide cylinder 36b, a support fixed to the upper end side of the roller 34 is provided. The cylinder 34a is inserted, and a roller pressing jack 36c is pivotally mounted between the roller 34 and the guide cylinder 36b.

Further, as shown in FIG. 4, the rear fixed support leg 26 includes a column 26a, an arch-shaped support 26b, a fixed shoe 26c, a connection frame 26d, and a side support 26e, similarly to the front fixed support leg 24.

A substantially trapezoidal beam 26f is provided between the columns 26a of the rear fixed support legs 26, and the beam 26f and the horizontal beam 20b provided on the rear side of the support beam 20 are coupled in the following configuration. ing.

A friction reducing plate 26g is fixed to the peripheral surface of the center of the beam 26f, and a box 26h is installed on the outer periphery of the plate 26g,
One side of this box 26h and the lateral beam 20b are
i have been joined through.

Further, between the box 26h and the beam 26f, a left / right moving jack 26j for moving the box 26h in the cross-sectional direction of the tunnel is provided.

With this configuration, the rear fixed support leg 26 and the support beam 20 are movably and oscillatably coupled in the cross-sectional direction of the tunnel, and the tip side of the support beam 20 in the curved portion of the tunnel is connected to the tunnel. It can be matched to the axis.

On the other hand, as shown in FIG. 6, the pitching frame 12 and the yawing frame 14 are provided on the distal end side of the support beam 20.

These frames 12 and 14 are bent and formed in a substantially hexagonal shape. The pitching frame 12 is swung about the horizontal plane of the tunnel as an axis, and protrudes from both side surfaces of the support beam 20. And supported by a pair of pins 38.

The yawing frame 14 is swung about the vertical plane of the tunnel as an axis, and the pitching frame 12
Are hingedly coupled to each other at a position opposed to the hinge.

FIG. 6 (B) shows this state, and FIG. 6 (C) shows the pitching and yawing jacks 12a, 14 for individually moving the frames 12, 14 respectively.
The installation state of a is shown.

The pitching jack 12a shown in FIG. 1 is supported by the support beam 20, and the yawing jack 14a is supported by the pitching frame 12.

The yaw frame 14 has a segment gripping mechanism.
A turning mechanism 16 for turning the 18 is mounted.

The turning mechanism 16 includes a bearing 16a on the yawing frame 14.
A swivel ring 16b rotatably supported via a shaft, and a swivel ring 16b supported on the upper side of the yawing frame 14.
And a swing arm 16d protruding from the center of the swing ring 16b.

Then, the lifting jack 4 is attached to the tip end of the spring arm 16d.
A segment gripping mechanism 18 is attached via the pin 4.

In the segment assembling apparatus configured as described above,
First, the gantry 10 is fixed.

When fixing the gantry 10, press the front fixed support legs 24
36c is contracted, the roller 34 is separated from the existing segment 19, and at the same time, the reaction support legs 22,
The columns 22c, 24a, 26a of the front and rear fixed support legs 24, 26 are extended, and the arched supports 22d, 24b, 26b and the fixing shoes 22e, 24
c and 26c are respectively in contact with the existing segment 19, and the side supports 24e and 26e are also in contact with the segment 19, respectively.

When the fixing of the gantry 10 is completed, for example, the segment 19a supplied to a predetermined position by the traveling vehicle 46 is gripped by the gripping mechanism 18 from below, and in this state, the segment 19a is turned to the predetermined position by the turning mechanism 16. , And fixed to the existing segment 19 after that.

In this case, fixing to the existing segment 19 in this case is generally performed by tightening and coupling with bolts and nuts, and this tightening operation can be performed either manually or automatically.

When the above-described assembling and fixing work is repeated to assemble and fix a segment for one ring, the excavation of the shield excavator, which has been continuously excavated even during this fixing work, causes a space for one ring at the rear end. Is formed, the reaction support leg
In a state where the support 22c of 22 is contracted and the fixed shoe 22e and the arch support 22d are separated from the segment 19, the moving jack 30 is driven to draw the reaction force support leg 22 toward the face,
Thereafter, the column 22c is extended to fix the reaction support leg 22.

Thereafter, the columns 24a, 26b of the front and rear fixed support legs 24, 26 are contracted, and the arched supports 24b, 26b and the fixing shoes 24c, 2
6c is separated from the segment 19, the pressing jack 36c is extended, the roller 34 is brought into contact with the existing segment 19, and the reaction jack 30 is used as the reaction force support leg 22 as a reaction force body.
, The gantry 10 is moved in the tunnel axis direction, and the assembly and fixing work of the segment 19a is performed again.

By the way, according to the segment assembling apparatus of the shield machine described above, the mechanism 18 for holding the segment 19a, the turning mechanism 16, and the like are supported by the gantry 10 provided separately and independently from the shield machine. Therefore, the segment 19 can be assembled in a state separated from the excavation work of the shield excavator, and the efficiency of the excavation work of the shield excavator can be greatly improved.

In the above embodiment, the front fixed support leg 24 is provided in the vicinity of the position of the center of gravity of the entire apparatus, and the structure in which the roller 34 is provided only on the support leg 24 is shown. It may be provided.

[Brief description of the drawings]

1 is an overall configuration diagram of a segment assembling apparatus according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 4 is a sectional view taken along the line IV-IV of FIG. 1, FIG. 5 is an explanatory view of a main part of the front fixed support leg, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 1, and FIG. VII-V in Fig. 1
FIG. 2 is a sectional view taken along the arrow II. 10 Stand 12 Pitching frame 14 Yawing frame 16 Swivel mechanism 18 Grasping mechanism 19 Segment

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-153500 (JP, A) JP-A-1-263391 (JP, A) JP-A-2-296998 (JP, A)

Claims (2)

(57) [Claims] 1. A segment assembling apparatus for sequentially assembling a segment at a rear end portion of a shield excavator along with the excavation of a shield excavator, wherein the shield is supported from within an existing segment located behind the shield excavator. An excavator and a gantry installed in a state separated and independent, a pitching and yawing frame supported by this gantry, a turning mechanism supported by the frame, and supported by the turning mechanism, from below the gantry A segment assembling apparatus, comprising: a gripping mechanism that grips the supplied segment. 2. A segment assembling apparatus for a shield machine according to claim 1, wherein said gantry is configured to be movable on an existing segment in a tunnel axial direction.