JPH0743278Y2 - Segment carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a segment carrier for transporting a segment to an erector (segment assembly device) portion in a shield frame, and particularly tow this segment carrier by a shield frame. The present invention relates to a segment carrier including a traveling support carriage and a carrier carriage that travels on the support carriage to transport a segment to a segment gripping position of the erector.

[Prior Art] Generally, a shield method is adopted as a method for excavating and forming a tunnel such as a subway or a sewer. In the shield method, a cylindrical structure called a shield frame is pressed by a jack installed in the rear part, and the reaction force is used as the forward force of the shield frame, while using a rotating cutter attached to the tip of the shield frame. It is a method of making a tunnel by digging in and fitting segments into the wall from the digging side.

The segment is usually formed as an arcuate piece, and is transported from the segment truck that is installed in the existing tunnel so that it can travel back and forth to the erector in the shield frame with a chain block or suspension wire attached to a trolley that runs on the ceiling beam. After that, the erector transports it to a predetermined position in the circumferential direction of the tunnel and assembles it in a ring shape to finally form a tunnel wall.

"Problems to be solved by the invention" By the way, in the rear part of the shield frame, many facilities such as screw conveyors, various hydraulic pipes, electric wires, and metal fittings for pulling the trailing carriage are generally installed. It is very narrow. Therefore, the work of transporting the segment by the chain block or the hanging wire is carried out by reciprocating in a place where the scaffolding is poor while attaching another wire to the segment to prevent the side movement thereof. At the erector position, the segment is seated at a predetermined position below the segment grip of the erector while adjusting the position and posture of the segment suspended by the wire in the vertical and horizontal directions. In this way, the work of transporting a heavy segment in a suspended state is extremely dangerous, and therefore it is necessary to carefully perform it while confirming the safety by calling out a plurality of workers. At present, workability is sacrificed because safety is prioritized.

An object of the present invention is to solve the above problems and to provide a segment carrier capable of efficiently and safely transporting a segment into a shield frame.

[Means for Solving the Problems] In order to achieve the above object, in the first invention, in a segment carrier for transporting a segment to the vicinity of an erector of a shield frame, a segment carrier is provided in a tunnel at a rear portion of the shield frame. A support carriage that is connected and towed is provided, a segment is mounted on the support carriage, and a carrier carriage for transporting the segment to the segment grip position of the erector is movably provided, and the carrier carriage is set to the segment grip position. In order to move, a rack is provided on the support truck along the tunnel axial direction, and a pinion drive mechanism is provided on the carrier truck so as to mesh with the rack. In the second invention, a shield frame is provided. Inside the tunnel at the segment carrier for transporting the segment to the vicinity of the erector inside A support carriage that is connected to the rear portion of the shield frame and is towed is provided, and a segment is mounted on the support carriage, and a carrier carriage for transporting the segment to the segment gripping position of the erector is provided so that the carrier carriage can travel. In order to move to the segment gripping position, a chain member is stretched on the support carriage along the tunnel axial direction, and a chain gear drive mechanism is provided on the carrier carriage by meshing with the chain member.

[Operation] According to the first invention having the above-described configuration, the carrier carriage is free to travel with respect to the support carriage, but since the pinion drive mechanism of the carrier carriage is engaged with the rack of the support carriage, this pinion drive mechanism Remains in a fixed position unless driven. Therefore, when the shield frame moves forward, the support truck is pulled by the shield frame while the carrier truck is fixed at a fixed position. When the shield frame stops at the segment assembly position, the support truck also stops. When assembling the segments, the pinion drive mechanism is operated to move the carrier truck to the segment gripping position of the erector. The erector grips the segment and conveys and assembles the segment in the circumferential direction of the tunnel. That is, according to the present invention,
It enables safe, quick, and labor-saving segment transfer work as compared with the conventional segment transfer work using a chain block or the like.

Further, in the second invention, a chain member is adopted in place of the rack, and a chain gear drive mechanism is adopted in place of the pinion drive mechanism. This is focused on making it possible to use a commercially available chain member having sufficient strength as a chain member, which makes the cost lower than that of the first device and facilitates maintenance. It has the same function as the device.

[Embodiment] Next, an embodiment of the first invention will be described.

In FIG. 1, a traveling rail 4 is laid in the tunnel 1 from the rear side in the tunnel excavation direction to the vicinity of the shield frame 2, and a segment truck 6 to be reciprocated by being pulled by a tow rope 5 is provided on the rail 4. ing. Provided between the traveling rail 4 and the shield frame 2 are a segment carrier 7 according to the present invention, and a segment transfer device 8 for transferring the segment 3 transported by the segment carriage 6 to the segment carrier 7. The segment transshipment device 8 is a beam cart that is towed by being connected to the screw conveyor 9 of the shield excavator 2.
The segment transshipment mechanism 11 is provided in the main part 10, and the segment 3 is grasped and conveyed to the segment carrier 7 side by the tip of the boom 12 which constitutes the segment transshipment mechanism 11, and the segment 3 has its curvature. The segment carrier 7 is mounted on the rear end of the segment carrier 7 so that its direction is perpendicular to the tunnel axis direction.

As shown in FIGS. 1 and 2, the segment carrier 7 includes a support carriage 14 which is connected to the rear portion of the shield frame 2 and is towed, and a segment 3 attached to the support carriage 14.
And a carrier carriage 15 for transporting the lower part of the segment holding part 13a of the erector 13 in the shield frame 2. The support carriage 14 is formed in an elongated shape so that it can be installed at the bottom of the tunnel, and a pair of left and right traveling sled members 16 are fixedly provided in the lower portion along the longitudinal direction. The sled member 16 is formed to be sufficiently longer than the pitch of the segments 3 so that the sled member 16 does not fall into the segment 3 even when a steel plate segment having a hollow inner wall side is used as the segment 3. As a result, the support carriage 14 is pulled by the screw conveyor 9 and can travel in the existing tunnel. As shown in FIG. 2, a pair of guide rails 17 are formed on the upper portion of the support carriage 14 for engaging with the carrier carriage 15 and holding the carrier carriage 15 so as to be movable relative to the support carriage 14 in the longitudinal direction. Along with
A pair of guide roller portions 18 for receiving the segment 3 and guiding it to the front end side of the support carriage 14 are formed on the outside of the guide rails 17. The guide roller portion 18 is configured by arranging a plurality of rollers 20 side by side in a roller accommodating bracket 19 formed along the guide rail 17. As shown in FIGS. 2 to 3 (a) and (b), the plurality of rollers 20 have a roller track surface projecting upward from the upper end of the guide rail 17 from the rear end 7b of the support carriage 14 to the vicinity 7c of the front end. Thus, the roller orbital surface is arranged so as to gradually incline downward from the tip 7a. Further, a rack member 21 having a rack 22 formed on the upper surface thereof is fixedly provided at an intermediate position between the pair of guide rails 17 above the support carriage 14 over the entire length of the support carriage 14.

On the other hand, the carrier trolley 15 has a plurality of traveling wheels 23 on both sides, and the traveling trolleys 23 are movably attached to the support trolley 14 so that the traveling wheels 23 are engaged between the pair of guide rails 17. A pinion drive mechanism 24 that engages with the rack 22 is formed on the carrier truck 15. The pinion drive mechanism 24 is a motor 25 fixed horizontally installed near the end on the rear side in the tunnel excavation direction below the carrier truck 15.
And a pinion 26 attached to the rotating shaft of the motor 25. The pinion 26 is engaged with the rack 22 while the motor 25
It is configured to reciprocate the carrier carriage 15 by the driving force of. A leading end side stopper member 27 is provided near the leading end of one guide rail 17, and an abutting member (not shown) formed in the lower portion of the carrier truck 15 is a stopper member.
It comes in contact with 27. The contact member is formed on the carrier carriage 15 such that the tip of the carrier carriage 15 is at least the width 1 of the segment 3 from the tip 7a of the support carriage 14.
It is set at a position where it abuts against the front end side stopper member 27 and stops the carrier carriage 15 at the above projecting position. As a result, the carrier truck 15 with the segment 3 mounted thereon projects from the tip 7a of the support truck 14 into the shield frame 2 and can enter the lower portion of the segment grip portion 13a of the erector 13. Further, at the base end of the guide rail 17 on which the stopper member 27 is formed, a base end side stopper member 28
Is formed, and an abutting member (not shown) formed in the lower portion of the carrier carriage 15 is brought into contact with this. The formation position of the contact member with respect to the carrier carriage 15 is set so as to contact the rear end side stopper member 28 and stop the carrier carriage 15 when the pinion 26 moves to the vicinity of the rear end of the rack 22. There is. Carrier trolley
The upper portion of 15 is curved so that the segment 3 can be mounted in a stable state, and a guide rail 17 is provided so that it can enter below the segment 3 placed on the guide roller portion 18.
Is formed lower than the upper end of. Also, carrier trolley 15
Is provided with a pair of engagement pins 29 that engage with the segments 3 placed on the support carriage 14. The engagement pin 29 is
As shown in FIGS. 4 (a) to 4 (c), the base end is attached to the carrier truck 15 by the pin 30 so as to be rotatably supported in the traveling direction of the carrier truck 15 and fixed to the carrier truck 15. A spring 31 urges the carrier truck 15 toward the rear end side. A stopper 32 for the engagement pin 29 is fixedly provided near the attachment position of the engagement pin 29 of the carrier truck 15. The stopper 32 is provided near the upper end of the carrier carriage 15 as shown in FIG. 4 (a), and restricts the engagement pin 29 from rotating from the vertical direction to the base end 15a side of the carrier carriage 15. There is. The projecting length of the engagement pin 29 from the carrier carriage 15 is set so that the tip 29a projects above the tip position of the roller 20 when the engagement pin 29 is oriented in the vertical direction. The engagement pin 29 is a base end of the support carriage 14 of the carrier carriage 15.
When it comes into contact with the segment 3 due to the movement toward the 14b side, as shown in FIG. 4 (b), it falls to the rear in the moving direction of the carrier truck 15 against the urging force of the spring 31, and the tip 29a of the engaging pin 29. Is configured to follow the outer surface of the segment 3 and pass through to the opposite side of the segment 3. Further, the engagement pin 29 is configured to rise vertically again by the biasing force of the spring 31 after passing through the lower portion of the segment 3. As a result, the engagement pin 29 is configured to abut and engage with the side surface of the segment 3 on the rear side in the tunnel excavation direction when the carrier truck 15 moves toward the tip 14a side of the support truck 14 again.

Next, the operation of this embodiment will be described.

The segment 3 is transported from the rear of the tunnel excavation direction to the vicinity of the shield frame 2 by the segment truck 6 and then transferred to the segment carrier 7 by the segment transfer device 8. During the transshipment of the segment 3 by the segment transshipment device 8, the segment 3 is placed on the rear end of the support carriage 14 such that the curvature direction thereof is perpendicular to the tunnel axis direction.

After the transshipment of the segment carrier 7 of the segment 3 is completed, the carrier carriage 15 is moved to the rear end side of the support carriage 14 (FIGS. 4 (a) and (b)). When the engagement pin 29 passes through the segment 3, the carrier carriage 15 is stopped and moved again to the front end side of the support carriage 14. This allows the engagement pin
29 abuts and engages with the side surface of the segment 3 on the rear side in the tunnel excavation direction (FIG. 4 (c)). Carrier trolley 15
In this state, the segment 3 is held and moved to the tip side of the support carriage 14. At this time, the segment 3 moves on the roller 20 by the movement of the carrier carriage 15 as shown in FIG. 2 to FIG.
It is mounted on the carrier carriage 15 by descending along the inclination of the roller raceway surface up to 7a. The carrier truck 15 further moves to the shield frame 2 side with the segment 3 mounted, and projects from the tip 7a of the support truck 14 into the shield frame 2 to convey the segment 3 to the lower portion of the segment grip portion 13a of the erector 13. . Segment 3 is Electa 13
Is transported to a predetermined position in the circumferential direction of the tunnel and assembled into a ring shape to finally form a tunnel wall.

In this way, the segment 3 conveyed to the vicinity of the shield frame 2 by the segment carriage 6 is simply placed at a predetermined position on the support carriage 14, and the segment 3 is formed below the segment gripping portion 13a of the elector 13 in the shield frame 2. Since 3 can be automatically conveyed, workability is greatly improved. The carrier truck moves the segment 3 into the shield frame 2.
Since it is mounted on top of the 15, it is extremely safe because it can prevent the lateral shake and drop of the segment 3.

Next, an embodiment of the second invention will be described.

The segment carrier 7 is composed of a support carriage 14 which is connected to the rear portion of the shield frame 2 and is towed, and a carrier carriage 15 which is attached to the support carriage 14 and conveys the segment 3 to the vicinity of the erector 9 in the shield frame 2. Is the same as that shown in the above-mentioned embodiment. In the present embodiment, as shown in FIG. 5, the means for moving the carrier carriage 15 is a chain member 33 stretched on the support carriage 14 and a chain gear provided on the carrier carriage 15. And a drive mechanism 34. The chain gear drive mechanism 34
It is composed of a motor provided below the carrier truck 15 and a chain gear 35 attached to the rotating shaft of the motor. As shown in FIG. 6, an engagement groove 36 is formed on the periphery of the chain gear 35 so as to engage with the chain member 33. The chain gear drive mechanism 34 engages the chain gear 35 with the chain member 33. At the same time, the carrier carriage 15 is reciprocally moved relative to the guide carriage 14 by driving the motor. By using a commercially available chain member having sufficient strength, the manufacturing cost can be reduced and maintenance can be facilitated.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects can be exhibited.

(1) The segment can be safely and swiftly transferred to the segment gripping position of the erector in the shield frame simply by placing the segment transferred near the shield frame by the segment trolley at a predetermined position on the guide trolley. Can be significantly improved.

(2) Since the segments are moved while being mounted on the carrier carriage, safe transportation of the segments can be achieved.

[Brief description of drawings]

1 is a partially cutaway sectional view showing an embodiment of the first invention, FIG. 2 is a partially cutaway perspective view showing an essential part of FIG. 1, and FIG.
Figures (a) and (b) are diagrams showing a segment conveying operation by the segment carrier shown in Figure 1 and Figure 2, and Figures 4 (a) to (c) are Figures 3 (a) and (b). FIG. 5 is a side view of an essential part showing an embodiment of the second invention, and FIG. 6 is a sectional view of the essential part of FIG. In the figure, 1 is a tunnel, 2 is a shield frame, 3 is a segment, 7 is a segment carrier, 13 is an elector, 14 is a support carriage, 15 is a carrier carriage, 22 is a rack, 24 is a pinion drive mechanism, 33 is a chain member, 34 is a chain gear drive mechanism.

Claims (2)

[Scope of utility model registration request] 1. A segment carrier for transporting a segment to the vicinity of an erector of a shield frame, wherein a support carriage that is connected to the rear portion of the shield frame and is towed is provided in a tunnel, and the segment is mounted on the support carriage. A carrier carriage for transporting a segment is movably provided at a segment gripping position of the erector, and a rack is provided along the tunnel axis direction on the support carriage so as to move the carrier carriage to the segment gripping position. A segment carrier characterized in that a trolley is provided with a pinion drive mechanism in mesh with the rack. 2. A segment carrier for transporting a segment in the vicinity of an erector in a shield frame,
A support carriage that is connected to the rear portion of the shield frame and is towed is provided in the tunnel, and a carrier carriage for mounting the segment on the support carriage and transporting the segment to the segment gripping position of the erector is provided so as to run freely. In order to move the carrier carriage to the segment gripping position,
A segment carrier, wherein a chain member is stretched along the tunnel axis direction on the support carriage, and a chain gear drive mechanism is provided on the carrier carriage by meshing with the chain member.