JPH0642284A - Method and device for supplying shaft segment - Google Patents

Abstract

PURPOSE:To protect a segment from being twisted and rotated, enhance safety and reduce segment supply time when moving the segment to an assembling position in a shaft. CONSTITUTION:A segment 1 is carried beside the inlet of a shaft 7 on a carriage 2 and suspended with a chain block 9 and carried into the inlet of the shaft 7. Driving a winch 20, the segment is loaded on a lift rack 12 which lifts up and down in the shaft 7. The lift rack 12 is engaged with a guide rail 22 which vertically extends on the shaft 7 and lowered downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supplying method and a supplying device for supplying a segment to a shaft formed vertically by a shield machine for a shaft.

[0002]

2. Description of the Related Art In recent years, attempts have been made to form vertical shafts, which are the starting and ending points of tunnel construction, by a shaft shield machine. In this case, as shown in FIG. 4, the excavator a excavates perpendicularly to the ground, and the vertical shaft segment b is stretched in the rear excavation hole. The segment b substantially constitutes the inner wall of the tunnel and receives the reaction force of the shield jack c (digging jack) provided in the excavator a.

Conventionally, the vertical shaft segment b is transported from the stockyard to the side of the vertical shaft entrance by a truck or the like, is hung by a ground crane d from there, and is carried into the vertical shaft e. (Between the segment b) and then assembled and fastened by bolts or the like.

[0004]

However, when the segment b is thus carried into the shaft e by the single crane d and moved down to the assembly position, the segment b is twisted by the segment b suspended by the crane d. There is a risk of rotation,
Dangerous to underground workers.

Further, since the segment b is moved to the assembly position while being suspended by the crane d, it is necessary to secure a space for the hanging wire f to move in the vertical shaft e, which is an effective work in the vertical shaft e. Space becomes narrow.

Further, the ground crane d is inevitably increased in size.

The object of the present invention, which was devised in view of the above circumstances, is to prevent the segment from being twisted or rotated when the segment is moved to the assembly position in the shaft, thereby improving the safety and the segment supply time. It is an object of the present invention to provide a method and a device for supplying a vertical shaft segment that shortens the length.

[0008]

In order to achieve the above object, a method of supplying a vertical shaft segment according to the present invention is to mount a segment on a trolley and convey it to the side of the vertical shaft entrance, and suspend it by a chain block. It is moved to the entrance, and is placed on a suspension stand that is moved up and down in the vertical shaft by a winch, and the suspension base is lowered while being engaged with guide rails extending vertically in the vertical shaft.

Further, the vertical shaft segment supply device according to the present invention comprises a trolley for transporting the segment from the stockyard to the side of the vertical shaft entrance, and a transverse chain block for suspending the segment on the side of the vertical shaft and transferring it to the vertical shaft entrance. It comprises a suspension frame which grips the vertical shaft entrance segment and descends in the vertical shaft by a winch, and a guide rail which extends in the vertical direction in the vertical shaft to engage with and guide the suspension frame.

[0010]

According to the above invention, the vertical shaft segment is transported from the stockyard to the side of the vertical shaft entrance by the carriage,
It is transferred to the shaft entrance by the horizontal transfer chain block,
It is gripped by the suspension base. After that, the suspension base is lowered in the vertical shaft by engaging with the guide rails and moving down in the vertical shaft. At this time, the segment gripped and fixed to the suspension base descends while the suspension base engages with the guide rails, so that twisting and rotation do not occur, and safety is improved.

Further, there are three constitutions of a trolley that conveys the supply of the segment from the stockyard to the side of the shaft entrance, a suspension mount that lowers the shaft from the shaft entrance to the lower part of the shaft, and a horizontal transfer chain block that passes between the suspension mount and the chassis. Therefore, compared to the conventional technology in which all of them are carried out by one ground crane, the individual transfer speed can be increased and the segment supply time can be shortened.

[0012]

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

FIG. 1 is a sectional view of a vertical shaft segment feeder, FIG. 2 is a side sectional view thereof, and FIG. 3 is a plan view thereof. As shown in the figure, a cart 2 for transporting the vertical shaft segment 1 from the stockyard to the side of the vertical shaft entrance is provided on the ground. This trolley 2 is self-propelled by a motor, an engine, etc. on a rail 3 that connects the stockyard and the shaft entrance side. A stopper 4 is provided at the end of the rail 3 on the side of the shaft entrance to prevent the truck 2 from overshooting.

On the side of the shaft entrance, a segment 1 on a trolley 2
A traverse device 5 for suspending and moving to the entrance of the vertical shaft is provided. The transverse feeding device 5 includes a pillar 6 which is erected so as to straddle the rail 3 and a vertical shaft 7 from the upper portion of the pillar 6.
A transverse rail 8 extending upward, and an electric chain block 9 that moves along the transverse rail 8 while engaging with the transverse rail 8.
And a rope 11 which is attached to the chain hook portion 10 of the electric chain block 9 and which substantially suspends the segment 1.

As shown in FIG. 3, the traverse rail 8 does not extend so as to bridge the diameter portion of the shaft 7, but extends so as to bridge near the inner peripheral surface of the shaft 7. There is. The rope 11 is wound around the segment 1 so as to hold the segment 1 from below. Alternatively, the rope 11 may be wound around a bolt mounting hole (not shown) of the segment 1. In any case, the position of the center of gravity of the suspended segment 1 is located on the extension line of the chain hook portion 10 so that the balance is not lost.

At the edge of the entrance of the vertical shaft 7, there is provided a suspension frame 12 for holding the segment 1 which has been laterally fed along the transverse rail 8 of the horizontal feeding device 5 and then descending in the vertical shaft 7. As shown in the figure, the suspension base 12 includes a main body 13 formed in a curved plate shape along the inner peripheral surface of the vertical shaft 7, and a support claw 14 provided inside the main body 13 for supporting the lower portion of the segment 1.
And a hook 15 for hooking and holding the upper part of the segment 1.
It consists of The support claws 14 are attached so as to be tilted slightly upward, and when the segment 1 is placed thereon, the segment 1 is pressed against the main body 13 side without slipping off. On the other hand, the hook 15
Has one end pivotally supported on the upper portion of the main body 13, and hooks and fixes the segment 1 placed on the support claw 14. In the present embodiment, the support claw 14 is
Although two and two hooking claws 15 are provided, respectively, a larger number may be provided.

The suspension base 12 is suspended in the vertical shaft 7 by a suspension device 16 provided at the edge of the entrance of the vertical shaft 7. The suspension device 16 includes a suspension column 17, which is erected at the edge of the entrance of the vertical shaft 7, a fixed pulley 18 attached to the column 17, and a movable pulley 1 attached to the upper surface of the suspension frame 12.
9 and a wire 21 of an electric winch 20 wound around these pulleys 18 and 19. According to this structure, when the electric winch 20 is operated, the suspension frame 12 suspended by the movable pulley 19 moves up and down with a winch force that is half of its own weight.

The suspension base 12 is engaged with a guide rail 22 extending vertically along the inner surface of the vertical shaft 7 in a dovetail groove shape. The upper end of the guide rail 22 is fixed to the base 17a of the suspension column 17, and is suspended from the base 17a. Further, the side surface of the guide rail 22 may be fixed to the inner surface of the shaft 7 and the lower end may be fixed to the excavator at the bottom of the shaft 7. Further, in order to improve stability, two or more guide rails 22 may be provided.

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

The vertical shaft segment 1 stocked in the above-ground stockyard is first placed on the carriage 2 and conveyed to the entrance side of the vertical shaft 7. Next, the chain block 9 of the traverse device 5 is suspended via a rope 11 and transferred to the shaft entrance. Then, it is placed on the supporting claws 14 of the suspension frame 12 provided at the entrance of the vertical shaft and gripped by the hooking claws 15. After that, the electric winch 20 is operated and the suspension base 12 is engaged with the guide rails 22 to lower the inside of the vertical shaft 7. As a result, the segment 1 is lowered in the vertical shaft 7. At this time, the segment 1 gripped and fixed to the suspension base 12 descends while the suspension base 12 engages with the guide rails 22, so that the segment 1 is not twisted or rotated in the middle thereof. Therefore, the safety for underground workers is improved.

[0021] Further, a trolley 2 that conveys the supply of the segment 1 from the stockyard to the side of the shaft entrance, a suspension base 12 that lowers the supply from the shaft entrance to the lower part of the shaft, and a traverse device that passes between the suspension base 12 and the chassis 2. Since there are three configurations of No. 5, compared to the prior art shown in FIG. 4 in which all of them are performed by one ground crane d, the individual transfer speed can be increased and the segment supply time can be shortened. You can At the same time, since the trolley 2, the suspension stand 12, and the transverse feeding device 5 are each a repetition of simple work, automation and labor saving can be promoted.

Since the segment 1 is not suspended and moved by the crane d as in the conventional case,
It is not necessary to consider the space in which the hanging wire f moves in the vertical shaft 7, and the effective working space in the vertical shaft 7 becomes wider. In other words, according to the present embodiment, it is sufficient to consider only the lifting space of the suspension frame 12 that moves up and down in the vertical shaft 7, and the other part can be used as an effective working space.

[0023]

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

(1) When the segment is moved to the assembly position in the shaft, the segment is not twisted or rotated, and the safety can be improved.

(2) It is possible to shorten the segment supply time for moving the segment from the stockyard to the assembly position in the vertical shaft, thus improving work efficiency.

(3) By automating the trolley, the suspension frame, and the horizontal transfer chain block, it is possible to promote labor saving in segment supply.

(4) Since the segment is not hung and moved by the crane, it is not necessary to consider the space in which the hanging wire moves in the shaft, and the effective work space in the shaft becomes wider.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vertical shaft segment supply device as an embodiment of the present invention (cross-sectional view taken along the line I-I of FIG. 3).

FIG. 2 is a side sectional view of the vertical shaft segment supply device (sectional view taken along the line II-II in FIG. 3).

FIG. 3 is a plan view of the vertical shaft segment supply device.

FIG. 4 is an explanatory view of a segment supply device showing a conventional example.

[Explanation of symbols]

 1 segment 2 trolley 5 transverse transport device 7 vertical shaft 9 chain block 12 suspension frame 20 winch 22 guide rail

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Sakama 2-4-1, Nishitsutsujigaoka, Chofu-shi, Tokyo Within TEPCO (72) Inventor Toshihiko Bessho 1-25, Nishishinjuku, Shinjuku-ku, Tokyo No. 1 in Taisei Construction Co., Ltd. (72) Inventor Nobuaki Kobayashi 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Within Taisei Construction Co., Ltd. (72) Kenichi Kaneko 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Inventor Hiroyuki Ito 11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries Co., Ltd. Inside Aichi factory (72) Inventor Kazuyuki Toita 11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries Aichi Factory Co., Ltd.

Claims (2)

[Claims] 1. A segment is placed on a bogie and conveyed to the side of the shaft entrance, suspended by a chain block or a hoist to be moved to the shaft entrance, and the segment is mounted on a suspension platform that is moved up and down in the shaft by a winch, and is suspended. A method of supplying a vertical shaft segment, characterized in that the frame is lowered while being engaged with guide rails extending vertically in the vertical shaft. 2. A trolley for transporting the segment from the stockyard to the side of the shaft entrance, a transverse chain block or hoist for suspending the segment by the shaft entrance and moving to the shaft entrance, and a winch after gripping the shaft entrance segment An apparatus for supplying a vertical shaft segment, comprising: a suspension base that descends in the vertical shaft by means of the vertical shaft; and a guide rail that extends in the vertical direction in the vertical shaft to engage with and guide the suspension base.