JP2581772Y2 - Roof shield device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof shield device.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a tunnel having a large width (flat shape), a method as shown in FIGS. 8 to 11 has been used. That is, first, as shown in FIG. 8, two bottom shafts a and b extending in parallel at predetermined intervals on the left and right are excavated by known means, and then the two bottom shafts a and b are excavated. As shown in FIG. 9, a substantially L-shaped concrete wall c which will later become a part of the side wall of the tunnel and a part of the track bed is formed in each of the outer corners and the lower corners.

Next, a line connecting the bottoms of the concrete walls c and c in a straight line and a line connecting the upper sides of the outer surfaces of the concrete walls c and c in a semicircle form the entire range f. Excavation is performed by hand excavation or excavation equipment such as a backhoe. As shown in FIG. 10, a semicircular shield excavation device A is installed between the upper sides of the concrete walls c and c so as to be movable in the excavation direction. Is done. While the shield excavating device A is advanced in accordance with the excavation of the tunnel, a known means is provided behind the shield excavating device A and between the lower horizontal portion of the concrete walls c and the upper semicircular portion. And a tunnel E having a large width as shown in FIG. 11 is constructed.

[0004]

However, in the above-mentioned conventional tunnel construction method, a wide range of earth and sand corresponding to almost the entire cross section of the tunnel, that is, a region connecting the upper and lower concrete walls with each other, that is, a wide area is simultaneously excavated. Therefore, there is a risk that the excavation cross-sectional area becomes large and the earth and sand on the face collapses and collapses, which poses a problem in the safety of work. It has to be large, the production cost is high and the construction cost is high.

For this reason, the earth and sand at the lower part of the roof connecting the two bottom shafts are partially excavated like the upper part and the lower part, and after excavating the upper part, the segments are automatically assembled at the rear part. It is conceivable that the roof shield is implemented by a roof shield device, but since the lower part of the roof when partial excavation is too narrow to secure a sufficient work space, it is necessary to provide a normal shield excavation device. There is a problem that the segment assembling apparatus cannot be applied.

The present invention has been devised to solve the above-mentioned conventional problems. A roof tunnel can be constructed safely and as inexpensively as possible, and segments can be easily assembled even in a space where a vertical interval of a roof shield is small. It is an object of the present invention to provide a roof shield device provided with a segment assembling device which can be performed in a short time.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a traveling rail laid on each of two bottom shafts excavated at a required interval on the left and right, and a bridge extending over both traveling rails. A frame main body movably installed, a traversing rail arranged so as to straddle the traveling rail on the front side of the frame main body, and an excavator for partially excavating the front surface of the tunnel while traversing along the traversing rail. A roof shield device, comprising: a rail for an assembling device installed at a rear portion of the frame main body so as to straddle the traveling rail; a traverse table that can be traversed along the rail for the assembling device; A lifting / lowering table supported so that the direction position can be adjusted, a segment gripping device attached to the lifting / lowering table via a parallel link mechanism so as to be able to move up and down in parallel, and having a segment clamp tool on an upper surface; Those of the roof shield apparatus, which comprising the segment assembly device comprising a rotary drive device for rotating the link mechanism up and down.

[0008]

According to the present invention, after excavating earth and sand on the front surface of the roof shield device with the cutter of the excavating device, the excavating device is moved along the traversing rail to a predetermined position, and the earth and sand on the front surface is excavated again. By repeating this excavation, earth and sand on the entire width of the traversing rail, that is, the front surface between the bottom shafts is excavated in a ring shape.

During the excavation process, the segment is assembled on the outer peripheral surface of the ring-shaped excavated portion behind the roof shield device by the segment assembling device. That is, when receiving the segment from the segment transport device to the segment assembling device, the elevator is first lowered, and the parallel link mechanism is rotated downward to set the segment gripping device to the lowest position. The segment carrier is moved along the ceiling rail so that the segment suspended on the segment carrier is located immediately above the segment gripper. To grasp the segment, and then retreat the segment carrier. Subsequently, after the parallel link mechanism is rotated upward to adjust the front-rear position of the segment, the elevator is raised, and the segment is disposed on the front side of the existing segment for assembly. The segment gripping device is lowered, and the same operation as above is performed again to assemble the next segment.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roof shield device according to the present invention will be described below with reference to the drawings. 4 to 7 show an example of a roof shield device to which the present invention is applied.
From the shaft 1 excavated vertically from the ground as shown in FIG. 7, two bottom guide shafts 2 and 3 extending in parallel at a required interval from side to side as shown in FIG. Excavation is performed by mechanical means, left and right traveling rails 4 and 5 are laid on each of the bottom shafts 2 and 3, and a roof is applied when traveling along the traveling rails and excavating a roof tunnel. 4 shows a shield device.

The bottom shafts 2 and 3 are preliminarily excavated while being reinforced by known reinforcing means.
In the excavated shafts 2, 3, a concrete wall surface 6, which will later become a part of the tunnel wall, is formed by casting. At the time of concrete casting, the base of the fixing bracket 7 is buried together, the rail base 8 is fixed to the fixing bracket 7, and the running rails 4, 5 are laid on the rail base 8. I have. A discharge conveyor 9 for discharging excavated earth and sand to the outside is attached to the rail base 8 so as to be able to run freely.

A roof shield device 10 is mounted on the traveling rails 4 and 5 of the bottom shafts 2 and 3. The roof shield device 10 has a middle and high curved frame main body 11 extending over the upper portions of the bottom shafts 2 and 3,
A traveling platform 13 attached to the lower ends on both sides of the frame body 11 via supporting legs 12 is mounted so as to travel on the traveling rails 4 and 5 via traveling wheels 14. A curved roof 15 extending between the upper portions of the bottom shafts 2 and 3 is integrally fixed on the upper side of the frame body 11, and a movable hood 17 having a hydraulic jack 16 is provided on the front side of the roof 15. Further, on the rear side, a segment assembling apparatus 20 for assembling the segment 19 at the rear part of the roof 15 while traversing along the curved assembling apparatus rail 18, and a reaction force is applied to the assembled existing segment 19a. A propulsion jack 21 for propelling the roof shield device 10 is provided.

A traversing rail 22 curved along the frame main body 11 is attached to the roof shield device 10, and a digging device 23 is attached to the traversing rail 22.
Is provided. In the case shown, two excavators 23 are provided. The excavator 23 includes, as shown in FIGS. 4 to 7, a traversing table 24 traversed along the traversing rail 22, and a moving rod 25 supported to be able to move back and forth with respect to the traversing table 24. A rotating cutter 26 attached to the front end of the moving rod 25 so as to be tiltable up and down so as to excavate earth and sand on the front surface by rotation. In the figure, reference numeral 27 denotes a ring-shaped roof tunnel formed between the bottom shafts 2 and 3.

FIGS. 1 to 3 show an embodiment of a segment assembling apparatus 20 provided at a rear portion of the roof shield device. The segment assembling device 20 is mounted on a rear portion of the frame body 11 so as to straddle running rails 4 and 5. The apparatus rail 18 is installed, and a traverse table 28 is provided on the assembly apparatus rail 18 so as to be able to traverse, and a gear 29 provided on the assembly apparatus rail 18 is provided.
The traversing table 28 is traversed by a traversing drive device 32 including a (rack) and a drive motor 31 having a pinion 30 meshed with the gear 29. A vertically movable table 34 is attached to the traversing table 28 via a vertical slide guide 33 so as to be able to move up and down, and between the vertically moving table 34 and the traversing table 28, the vertically moving table 34 is moved up and down to adjust the vertical position. Lifting drive 35 comprising a lifting jack
Is provided.

Further, a segment gripping device 39 is provided behind the elevator 34 so as to be able to adjust the position of a sliding frame 37 provided with a segment clamp member 36 on the upper surface thereof back and forth along a sliding rod 38. A segment grasping device 3 is provided between the segment grasping device 39 and the lift 34.
9 is connected via a parallel link mechanism 40 which can be moved up and down while being held horizontally. The parallel link mechanism 40 includes an upper link 41 that connects the lifting table 34 and the segment gripping device 39 so as to be rotatable up and down. Lower link 4 having the same length for movably connecting
2, and a plurality of (two in the figure) parallel link mechanisms 40 configured as described above are provided in the width direction.

A bracket 43 protruding downward is provided between the intermediate positions of the upper link 41 in the longitudinal direction, and a lower position of the bracket 43 and the lifting table 34 are provided.
A rotation drive device 44 for rotating the parallel link mechanism 40 up and down and moving the segment gripping device 39 up and down in parallel is provided.

A ceiling rail 45 fixed to the lower surface of the existing segment 19a assembled by the segment assembling apparatus 20 is provided behind the segment assembling apparatus 20.
Travels in the tunnel excavation direction along the road, and suspends the segment 19 via the suspension point 46 by the segment assembling apparatus 2.
There is provided a segment carrier 47 for supplying the segment carrier onto the 0-segment gripping device 39.

Next, a procedure for assembling the segment 19 will be described. In receiving the segment 19 carried by the segment carrier trolley 47 into the segment assembling apparatus 20, the elevator 34 is first lowered and the parallel link mechanism 40 is rotated downward to lower the segment gripper 39 to the lowest position. A position (a virtual line position in FIG. 1). The segment transport trolley 47 is moved along the ceiling rail 45 so that the segment 19 suspended by the segment transport trolley 47 is located immediately above the segment gripping device 39.

Next, the segment 19 is lowered by the segment carrier 47 and placed on the segment gripping device 39 and clamped by the segment clamp 36.
When the segment 19 has been delivered to the segment gripping device 39, the segment carrier 47 is moved backward along the ceiling rail 45.

Subsequently, the rotation driving device 44 is driven to rotate the parallel link mechanism 40 upward, and the segment 19 supported by the segment gripping device 39 is moved to the existing segment 19.
After adjusting the front / rear position so as to be at the front side of the position a, the lifting / lowering drive device 35 by the lifting / lowering jack is reduced and
4 and move the segment 19 to the existing segment 19a.
Attach to The segment gripping device 39 is lowered, and the same operation as described above is performed again to assemble the next segment 19.

[0021]

According to the roof shield device of the present invention,
By partially excavating the roof tunnel between the two bottom shafts to the minimum necessary extent by the roof shield device,
Not only can the excavation cross-section be made as small as possible, preventing landslides at the face, and not only can the roof tunnel be excavated safely, but also the tunnel can be constructed with a smaller shield excavation device than before, so the tunnel The entire construction cost can be reduced, and the segment gripping device of the segment assembling device provided so as to traverse the rear portion of the roof shield device can be moved up and down by the parallel link mechanism, and by the lifting platform. Since the lifting and lowering are performed in combination, it is possible to receive the segments and adjust the front / rear position in a compact configuration to perform assembly, and easy and efficient even in a space with a small vertical space under the roof. An excellent effect can be achieved in that an efficient automatic assembling operation can be performed.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a segment assembling device in a roof shield device according to the present invention.

FIG. 2 is a view in the direction of arrow A in FIG. 1;

FIG. 3 is a view in the direction of arrow B in FIG. 1;

FIG. 4 shows an example of a roof shield device as viewed in a tunnel excavation direction, and a left half and a right half in the figure are front views viewed from different positions.

FIG. 5 is a view taken in the direction of arrows CC in FIG. 4;

FIG. 6 is a view taken in the direction of arrow DD in FIG.

FIG. 7 is a side view showing an example of a roof shield method to which the present invention is applied.

FIG. 8 is a front view showing an example of a conventional shield method, showing the construction of two parallel shafts.

FIG. 9 is a front view showing a state in which a concrete wall is formed in the bottom shaft, which is performed after the operation of FIG. 8;

FIG. 10 is a front view showing an installation state of a shield excavating device performed after the operation of FIG. 9;

11 is a front view of a large-width tunnel constructed by a shield method performed after FIG. 10;

[Explanation of symbols]

 2,3 ... Bottom shaft 4,5 ... Running rail 10 ... Roof shield device 11 ... Frame body 15 ... Roof 18 ... Rail for assembly device 19 ... ... Segment 20 ... Segment assembling device 22 ... Travel rail 23 ... Excavation device 28 ... Travel table 34 ... Elevating table 36 ... Segment clamp tool 39 ... Segment gripping device 40 ... Parallel link mechanism 44 ... Rotation drive device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-257284 (JP, A) JP-A-61-221491 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9/04 E21D 9/00 E21D 9/10 E21D 11/40

Claims (1)

(57) [Scope of request for utility model registration] 1. Excavated at a required interval on the left and right
A traveling rail laid on each of the bottom guide shafts of the book, a frame body installed so as to be able to run over both traveling rails, and a traversing rail arranged on the front side of the frame body so as to straddle the traveling rail. And a digging device for partially digging the front of the tunnel while traversing along the traversing rail, wherein the roof shielding device is for an assembling device that is installed at the rear of the frame main body so as to straddle the traveling rail. A rail, a traversing table that can be traversed along the assembling apparatus rail, an elevating table that is supported by the traversing table so that the vertical position can be adjusted, and a vertical link via a parallel link mechanism to the elevating table. A segment assembling device comprising a segment gripping device movably mounted and having a segment clamp on the upper surface, and a rotation drive device for rotating the parallel link mechanism up and down. Roof shield apparatus according to claim and.