JP3380455B2 - Segment transport trolley - 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 carrier truck, and more particularly to a shield tunnel having a small diameter cross section.
The present invention relates to a segment carrier truck capable of safely suspending a segment in a hoist portion of a segment carrier device.

[0002]

2. Description of the Related Art In a shield tunnel having a small diameter section, since the inner diameter of the segment after assembly is small, the working space behind the excavator is limited. FIG. 5 is a tunnel sectional view showing an example of a shield tunnel having a small diameter section. As shown in the figure, two tracks on which the trailing carriage 51 and the segment transport carriage 52 travel are laid in the tunnel cross section. The segment 54 is carried into the hoist starting point position of the segment carrier 60 behind the shield excavator (not shown) by the segment carrier truck 52 traveling on the track 53, and is hoisted to the hoist 61 from the hoist 61. It is designed to be transported along the beam to the erector for segment assembly at the tail position of the shield excavator. At this time, in the tunnel having a small diameter cross section, in order to secure the hoist lift, the segment transfer device 60 is used.
Set the starting point position of the hoist beam of
The track center line 53c must be shifted to the tunnel center side. Therefore, when the hoist 61 hoists the segment 54 on the carrier vehicle 52, the segment 54 is laterally pulled as shown by the arrow in the drawing and is hung just below the hoist 61.

[0003]

As described above, since the segment hoisting work at the hoist start point of the segment carrier is laterally hoisted, a heavy segment swings so as to be pulled toward the tunnel center. For this reason,
Ensuring the safety of workers working around the segment is an issue. Further, the carrier truck becomes unstable, and in severe cases, derailment may occur.

Therefore, the object of the present invention is to solve the above-mentioned problems of the conventional technique and to eliminate the positional deviation between the segment hoisting position and the segment on the segment carrier by the hoist of the segment carrier. An object of the present invention is to provide a segment carrier truck capable of safely hoisting a segment.

[0005]

In order to achieve the above object, the present invention relates to a segment carrier for traveling in a tunnel, loading a segment on a carrier and transporting it to the rear of a tunnel excavator, wherein the carrier is The present invention is characterized in that the slide mechanism attached to the trolley frame slides a predetermined amount in a direction orthogonal to the traveling direction of the trolley while the segments are mounted.

At this time, the slide mechanism is a hydraulic cylinder jack fixed to the front and rear ends of the truck frame, and the rod extension of the hydraulic cylinder jack pushes a part of the truck to slide the truck. It is preferable.

[0007] Preferably, the loading platform slides until the loaded segment is located just below the suspension point of the hoist mounted in the tunnel.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a segment carrier truck of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view showing a segment carrier 10 of the present invention in which a segment 1 is placed. As shown in the figure, the segment carrier 10 includes a steel carrier frame 11 that can run on a track 2 laid in a mine, and a carrier 20 that covers the upper surface of the carrier frame 11 and on which the segment 1 is placed. And a slide mechanism 30 for sliding the loading platform 20 toward the tunnel center.

The bogie frame 11 has a steel frame structure in which side members 12 and cross members 13 made of shaped steel are assembled in a ladder shape and equipped with front and rear wheel 14 bearings. Is a hydraulic cylinder jack 30 as a slide mechanism described later.
Is built in. The loading platform 20 is a loading platform plate 21 that covers the truck frame 11 as shown in FIGS.
And a side plate 22. The main body of the hydraulic cylinder jack 30 as a slide mechanism is fixed to the side surface of the cross member 13 at the front and rear ends of the carriage. The side plate 22 of the luggage carrier 20 is pressed by the rod expanding and contracting operation of the hydraulic cylinder jack 30, and the luggage carrier plate 21 on which the segment 1 is mounted can be slid integrally by Δ = 300 mm in the tunnel center direction. . In this embodiment, as shown in FIGS. 2A and 2B, a double-acting hydraulic cylinder jack 30 having a stroke of 400 mm is attached to the side surface of the cross member 13. Further, since the rod tip 30a is fixed to the inner surface of the side plate 22, the loading platform 20 can be returned to the initial position on the truck frame 11 by the rod returning operation. In addition,
A guide rail (not shown) is provided between the trolley frame 11 and the load carrier plate 21.
Can be slid smoothly.

The hydraulic circuit 40 for driving the slide mechanism will be described with reference to FIG. The hydraulic pipes of the two hydraulic cylinder jacks 30 as a slide mechanism installed in the transport carriage 10 are guided to a coupler joint 32 provided on a side portion of the carriage frame 11. It is connected to an external hydraulic circuit 40 via the coupler joint 32. A hydraulic unit 43 as a pressure source of the hydraulic circuit 40 is installed at the rear of a not-shown succeeding carriage traveling on an adjacent track, and is composed of a hydraulic pump and a hydraulic tank. The rod of the hydraulic cylinder jack 30 can be expanded and contracted by the pressure oil supplied from the hydraulic unit 43. It should be noted that in the present embodiment, the switching back and forth of the pressure oil is performed by the manual switching valve 44 provided in the hydraulic circuit 40. Further, the two hydraulic cylinder jacks 30 and 30 are arranged so that the rods extend and retract in synchronization with each other. The amount of extension and the operating speed can be controlled by adjusting the operation on the hydraulic unit 43 side. Further, a programmable controller or the like may be incorporated to control the extension amount by a positioning sensor provided at a predetermined position.

Next, the sliding operation state of the load carrier plate 21 in the segment carrier 10 is set to the segment 1
The description will be made with reference to FIGS. In the shield tunnel 5 of the present embodiment, each temporary facility has a track for traveling of the segment carrier 10 in the left half portion toward the face of the tunnel center line CT, as shown in the longitudinal sectional view of the tunnel. However, a track for running an equipment truck such as a trailing truck (not shown) is laid in the right half portion.

The segment carrier 10 of the present embodiment is formed by connecting two units. Each of the two transport carriages 10 is equipped with a hydraulic jack 30 as a slide mechanism, and in a coupled state, it is towed from the wellhead to the rear of the shield excavator by a battery locomotive (not shown) on the underground orbit. ing. No. at the top 1 trolley 10
A segment is placed on A, and the subsequent No. 2 dolly 1
B segment and K segment are placed in 0B, and 1
The knitting can carry a segment for one ring. The sliding operation of the loading platform 20 is performed by connecting the hydraulic circuit 40 to the coupler joint 32 of each transport vehicle 10.

In FIG. The state where the carrier plate 21 of the single truck 10A is slid to the tunnel center line CT side is shown. At this time, No. The bogie frame 11 of the single bogie 10A is indicated by a broken line in the drawing. The hoist beam is obliquely arranged from the starting point position P1 of the transfer hoist 7 to the vicinity of the erector at the tail position of the shield excavator 8 as shown by the center line CH. 4A to 4C are cross-sectional views showing the position of the segment 1 that is suspended by the transport hoist 7 and transported to the erector 6. In addition, the erector 6
Shows the position only with a straight line for simplification of the figure.

As shown in FIGS. 4A and 4B, when the segment carrier 10 reaches the hoist start position P1, the hydraulic cylinder jack 30 is driven to move the carrier plate 21 in the tunnel center CT direction by the slide amount Δ. Align the lifting position of 7 with the segment center. As a result, the segment 1 immediately below the hoist 7 can be safely lifted. In the present embodiment, the hoist beam (not shown) is a hoist starting point position P.
1 (IVa-IVa cross section) to the IVb-IVb cross section position (P2) shown in FIG.
It is installed horizontally up to the installation position. During this time, the hoist 7 obliquely moves on the hoist beam in a plane slightly toward the tunnel center side. Further, as shown in FIG. 4C, the segment 1 conveyed to the erector position P3 (IVc-IVc cross section) has a gripping mechanism (not shown) for the erector.
The posture of the arm 6A is changed so as to form a ring in the circumferential direction while being gripped by the arm 6A, and the arms 6A are sequentially set to the planned assembly position.

In this way, since each piece of the segment 1 can be hoisted by the transfer hoist without being laterally suspended and can be smoothly transferred to the erector position, extremely safe segment assembly work can be realized. In addition, in this embodiment, the slide of the loading platform plate 21 of the segment cart is two hydraulic cylinder jacks 3.
Although it is realized by the rod extension of 0, it is also possible to incorporate a link mechanism that can be operated by one cylinder jack into the bogie frame 11 and slide the carrier plate 21 using this link mechanism. It is also possible to slide the load carrier plate by the rack and pinion structure. In this case, an electric motor or a hydraulic motor can be used as the drive source.

The slide amount of the loading platform set by the slide mechanism varies depending on the size of the tunnel cross section,
It is preferable to design the bogie in consideration of the movement of the center of gravity when the segment is slid to the hoist suspension position.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a segment carrier truck according to the present invention.

FIG. 2 is a front view of the segment carrier truck shown in FIG. 1 (at the initial position of the loading platform, when sliding).

FIG. 3 is a tunnel vertical cross-sectional view showing the positional relationship of the segments in each conveyance state.

4 is a tunnel cross-sectional view indicated by each cross-section line in FIG.

FIG. 5 is a tunnel cross-sectional view showing a state where segments are lifted in a conventional small-diameter cross-section tunnel.

[Explanation of symbols]

1 segment 7 hoists 8 tunnel excavator 10 segment carrier 10A No. 1 dolly 10B No. Two dolly 11 dolly frame 20 loading platform 30 Hydraulic cylinder jack (slide mechanism) 40 hydraulic circuit

─────────────────────────────────────────────────── ───Continued from the front page (73) Patent holder 000174943 Mitsui Construction Co., Ltd. 1-36-5 Nihonbashi Kashigaracho, Chuo-ku, Tokyo (73) Patent holder 597162433 Kurodatec Co., Ltd. 2 Yokotsumi, Tsurumi-ku, Osaka-shi, Osaka Prefecture 2-6 (72) Inventor Atsushi Imaizumi 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Yasunori Oi 1-3-2 Shibaura, Minato-ku, Tokyo Construction Shimizu Incorporated (72) Inventor Tsutomu Kose 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Akira Kawano 2-2-2 Matsuzaki-cho, Abeno-ku, Osaka-shi, Osaka Okumura group (72) Inventor Satoru Endo 1-3-2 Otemachi, Chiyoda-ku, Tokyo Mitsui Construction Co., Ltd. (72) Inventor Kazuo Kuroda 2-26 Yokotsumi, Tsurumi-ku, Osaka-shi, Osaka Issue Kuroda Tech Co., Ltd. (56) Reference JP-A-8-158800 (JP, A) JP-A-2-194298 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 11 / 40

Claims (3)

(57) [Claims] 1. A segment carrier that travels in a tunnel, loads segments on a carrier, and transports the segments to the rear of a tunnel excavator, wherein the carrier has a segment mounted by a slide mechanism attached to a carrier frame. The segment carrier truck is characterized in that the carriage is slid by a predetermined amount in a direction orthogonal to the traveling direction of the carriage. 2. The slide mechanism is a hydraulic cylinder jack fixed to the front and rear ends of the carriage frame, and the rod extension of the hydraulic cylinder jack pushes a part of the cargo bed to slide the cargo bed. The segment carrier according to claim 1, wherein the segment carrier is a carriage. 3. The segment carrier truck according to claim 1, wherein the loading platform is adapted to slide until a loaded segment is located immediately below a suspension point of a hoist mounted in the tunnel.