JP3424343B2 - 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 transferring a segment on a truck by a hoist to an erector.

[0002]

2. Description of the Related Art A segment is stretched on an inner surface of a hole excavated by a machine body to form an inner wall of a tunnel by an erector provided on the machine body. The segment is supplied to the erector in the following manner.

First, a plurality of segments are stacked on a segment carriage on the tunnel entrance side. And
The dolly is moved to the inner side of the tunnel by traveling on a rail laid along the longitudinal direction of the tunnel. After that, the segments on the carriage are hung one by one on a hoist provided above them, moved forward along the hoist beam, and supplied to the erector.

[0004]

However, in this system, the bogie must be kept on the back side of the tunnel until all the segments on the segment bogie are transferred to the erector by the hoist. That is, the carriage (loading carriage) cannot be returned to the tunnel entrance side unless it becomes an empty carriage after waiting for all segments mounted thereon to be transported to the erector by the hoist.

After that, a segment is placed again on the empty truck returned to the entrance side of the tunnel and becomes a loading truck to repeat the reciprocating motion of moving to the back side of the tunnel. In the case of long-distance excavation in which the length becomes long, it is conceivable that when the excavator body excavates the next one ring, the next loading carriage does not reach the back side of the tunnel. In this way, the waiting time of the segment trolley becomes long, which has been a serious problem in the operation schedule.

An object of the present invention, which was devised in view of the above circumstances, is to provide a segment supply device which does not wait for the carriage when supplying the segments on the carriage to the erector by the hoist.

[0007]

In order to achieve the above object, the present invention is directed to forming a rail of a trolley for conveying a segment in front of a rear trolley in a tunnel by bifurcating it and forming a segment above the bifurcated rail. A hoist beam for transporting the vehicle to the erector side is switchably provided.

The bifurcated rail may be provided on a moving plate towed by the excavator body.

The hoist beam may be provided on a rear carriage pulled by the excavator body, and the bifurcated rail may be provided on a moving plate pulled by the excavator body.

[0010]

[Function] Place the loading carriage on one of the two-way rails,
While supplying the segment on the loading carriage to the erector by the hoist of the hoist beam, the next loading carriage is run toward the other rail of the forked rail. When the next carrier arrives at the other rail of the forked rail, the carrier of one rail of the forked rail becomes an empty carrier.
Therefore, the hoist beam is alternately switched every time and the above operation is repeated.

Further, if the bifurcated rail is provided on the moving plate pulled by the excavator main body, the bifurcated rail is integrally advanced without being left behind in the excavation of the excavator main body.

If the hoist beam is provided on the rear carriage towed by the excavator body, the hoist beam is integrally advanced without being left behind during the excavation of the excavator body.

[0013]

An embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a segment 3 is stretched by an erector 2 on the inner surface of the hole excavated by the excavator body 1 to construct a tunnel. The erector 2 is provided with a swivel ring 6 rotatably provided in the shield frame 4 via rollers 5, a support portion 7 attached to the rear surface of the swivel ring 6, and a radial direction expansion / contraction attached to the support portion 7. It is composed of a segment grip portion 8.

In the tunnel, a segment carriage 9 for transporting the segment 3 and a rear carriage 10 towed by the excavator body 1 are provided so that they can travel freely.
The segment trolley 9 travels on a segment trolley rail 11 laid in the center of the tunnel, and the rear trolley 10
Runs on a rear bogie rail 12 laid on both left and right sides of the segment bogie rail 11. Rear trolley 10
The left trolley 10a and the right trolley 10b traveling on the left and right rails 12 are integrally configured via a support base 13 hung over the upper portion of the left trolley 10a and the right trolley 10b. It is a thing. The rails 11 and 12 are laid on the sleepers 14 that are laid across in the transverse direction of the tunnel.

In front of the rear carriage 10, a moving plate 16 pulled by the excavator main body 1 via a wire 15 is mounted on rails 11 and 12. The wire 15 has one end fixed to the front end portion 16 a of the moving plate 16 and the other end fixed to a bracket 4 a provided on the shield frame 4. The moving plate 16 is composed of a narrow portion 17 located between the left and right carriages 10 a and 10 b forming the rear carriage 10 and a wide portion 18 in front of the narrow portion 17. The narrow portion 17 is provided with a connection rail 19 continuous with the segment truck rail 11 on the sleeper 14, and the wide portion 18 is
A forked rail 21 connected to the connection rail 19 via a point 20 is provided.

The connection rail 19 is smoothly inclined so as to be continuous with the segment truck rail 11 on the sleeper 14. The forked rails 21a and 21b connected to the connection rail 19 via the point 20 have the segment 3
The segment trolley 9a on which is loaded and the segment trolley 9b on which nothing is loaded are respectively loaded. The loading carriage 9a and the empty carriage 9b do not move by themselves but are connected to the traveling carriage 22 and moved. A stopper 23 is provided at the end of each bifurcated rail 21.

Details of the moving plate 16 are shown in FIGS.
Shown in. The point 20 provided between the connecting rail 19 and the bifurcated rail 21 is composed of a pair of rail pieces 26 having one end 23 pivotally supported and the other end 24 connected to the air cylinder 25. At this point 20, the segment carriage 9 is guided to the lower bifurcated rail 21a in the state shown in FIG. 3, and is switched and guided to the upper bifurcated rail 21b. This is because the wheels 27 of the segment truck 9 are guided inside the rail pieces 26.
On the bottom of the moving plate 16, the rail 1 on the sleeper 14
A guide 28 is provided that abuts the side surfaces of 1, 12. These guides 28 have a function of aligning the position of the connection rail 19 on the moving plate 16 with the position of the segment truck rail 11 on the sleeper 14.

As shown in FIGS. 1 and 2, a hoist beam 29 for transporting the segment 3 to the erector 2 side is switchably provided above the bifurcated rail 21. A front end 30 of the hoist beam 29 is pivotally supported on the erector 2 side, and a rear end 31 of the hoist beam 29 moves in the horizontal direction.
The segment 3 on any of the rails a and 21b can be suspended. The hoist beam 29 is shown in FIG.
As shown in FIG. 3, the hoist 3 is composed of an H-shaped cross section and is self-propelled along the beam 29 on its lower flange 32.
3 is engaged. Hoist 33 has segment 3
A hook 34 for suspending is hung up and down freely.

The front end 30 of the hoist beam 29 is supported by a bracket 35 attached to the shield frame 4 via a spherical bearing 36, as shown in FIG. On the other hand, the rear end 31 of the hoist beam 29 is mounted on the support base 13 provided on the upper portion of the rear carriage 10 and is movable in the horizontal direction. Specifically, an engagement pin 37 is provided on the lower surface of the rear end 31 of the hoist beam 29, and the engagement pin 37 is engaged with a guide groove 38 formed in an arc shape on the support base 13. There is. The curvature of the guide groove 38 matches the turning radius of the hoist beam 29 around the spherical bearing 36.

As shown in FIG. 6, wires 39 for horizontally moving the beam rear end 31 are attached to the left and right of the rear end 31 of the hoist beam 29. These wires 39 are wound around pulleys 40 provided on the left and right of the support base 13 and deflected downward, and the winding drums 4 respectively.
It is wrapped around 1. Each take-up drum 41 is rotated in the normal and reverse directions by a motor (not shown), and one of the drums 41a
So that when the other winds up, the other drum 41b
Winding and unwinding the wire. As a result, the rear end 31 of the hoist beam 29 is moved in the horizontal direction, and the hoist beam 29 is rotated.

The operation of this embodiment having the above configuration will be described.

First, as shown in FIGS. 1 and 2, a loading carriage 9a on which a segment 3 is loaded on the tunnel entrance side.
However, the traveling carriage 22 causes the segment carriage rail 11 to move.
One forked rail 21 on the moving plate 16
It is placed on a. Then, while the segment 3 on the vehicle of the loading platform 9a is being supplied to the erector 2 by the hoist 33 of the hoist beam 29, the next loading vehicle 9b is run from the tunnel entrance side toward the other forked rail 21b.

The next loading truck 9b is the other forked rail 21.
When the vehicle arrives at b, the loading carriage 9a on one of the forked rails 21a becomes an empty carriage after the transfer of the segment 3 to the erector 2 is completed. Therefore, the hoist beam 29 is switched from one rail 21a side to the other rail 21b side to supply the newly arrived segment 3 on the loading carriage 9b to the erector 2. Then, the empty carriage 9a on the one rail 21a that has been supplied is pulled by the traveling carriage 22 and returned to the tunnel entrance side, and the segment 3 is reloaded to form a loading carriage. The loading carriage 9a is again moved to the one forked rail 21a by the traveling carriage 22.

In this way, the loading carriage 9 alternately arrives at the forked rails 21a and 21b, the hoist beam 29 is alternately switched every time, and the segment 3 of the loading carriage 9 of one of the rails 21 is supplied to the erector 2. Then, if the empty truck 9 on the other rail is returned during the supply, the waiting time of the segment truck 9 is shortened (or eliminated). Therefore, it is advantageous in the operation schedule of the segment truck 9 in long-distance excavation. Further, since the segment 3 can be continuously supplied to the erector 2, the system is suitable for a so-called simultaneous excavation shield that simultaneously excavates the ground and assembles the segment 3.

The moving plate 16 is pulled by the excavator main body 1 through the wire 15, and the hoist beam 2 is used.
Since 9 is provided on the rear carriage 10 that follows the excavator body 1, the moving plate 16 and the hoist beam 29 integrally move forward as the excavator body 1 advances. Therefore, the relative positional relationship between the segment 3 on the moving plate 16 and the hoist 33 of the hoist beam 29 is always kept constant regardless of the excavation of the excavator body 1.
Therefore, by simply switching the hoist beam 29 to the left or right without performing a complicated work such as positioning,
Can be supplied to the segment 3.

Further, such a system is highly versatile because it can be used as it is for other tunnel construction as long as there is a space in which two segment carriages 9 can be juxtaposed in the tunnel. In addition, the system is compact and inexpensive.

[0028]

As described above, according to the present invention, the following excellent effects can be exhibited.

(1) It is possible to shorten the waiting time of the truck that carries the segment. Therefore, in the long-distance excavation, the operation schedule of the trolley becomes easier and the work efficiency is improved.

(2) Since it is highly versatile, it can be used as it is for other tunnel construction, and cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of a segment supply device showing an embodiment of the present invention.

FIG. 2 is a plan view of the segment supply device.

FIG. 3 is a plan view of a moving plate.

FIG. 4 is a front view of a moving plate.

5A and 5B are explanatory views of a hoist beam, in which FIG. 5A is a plan view and FIG. 5B is a side view.

FIG. 6 is a rear view of the hoist beam.

[Explanation of symbols]

1 Excavator body 2 Electa 3 segments 9 dolly 11 rails 16 moving plate 21 Bifurcated rail 29 hoist beam

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (3)

(57) [Claims] 1. A rail of a carriage for transporting a segment in a tunnel is formed by bifurcating, and a hoist beam for transporting the segment to the erector side is switchably provided above the bifurcated rail. Segment feeding device. 2. The segment supply device according to claim 1, wherein the bifurcated rail is provided on a moving plate towed by the excavator body. 3. The segment supply according to claim 1, wherein the hoist beam is provided on a rear carriage pulled by the excavator body, and the forked rail is provided on a moving plate pulled by the excavator body. apparatus.