JP3013979B2 - 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 for conveying segments for shield work.

[0002]

2. Description of the Related Art The shield method uses a shield excavation method.
This is a method of constructing a tunnel in a pile of sediment by repeating a series of operations such as propulsion, segment assembly, and backfilling to the outer periphery of the segment.

FIG. 6 is a conceptual diagram that simply shows the process from the production of a segment to the loading into a shield mine. In the shield work, as shown in the figure, first, a segment 1 is manufactured in a segment yard on the ground, and then this is suspended on a shaft 3 by a crane 2 and is mounted on a segment carrier 4. Next, the segment carrier 1 is transported to transport the segment 1 into the shield shaft. Next, it is transported further forward by the segment supply mechanism 5 and assembled into a ring shape by a segment assembly mechanism (not shown) called an erector to form a primary lining.

Here, the segments 1 are usually stacked in several stages on the segment carrier 4 in order to increase the transport efficiency. However, in order to prevent damage to the erector holding hardware attached to the segments 1, In addition, for convenience of handling, a predetermined pillow is often interposed between the segments 1 to secure a constant interval.

[0005]

Here, when the segment 1 loaded on the segment carrier 4 is transported further forward by the segment supply mechanism 5, the upper segment may be taken out as it is. Needs to remove the above-mentioned pillow material once,
Conventionally, this has been performed manually.

However, the weight of the segment is about 3 tons when it is large, and the pillow material for supporting the segment is considerably heavy, for example, about 10 kg. In many cases, the places where the work is performed are narrow.

[0007] For this reason, removal of the pillow material is a heavy burden on the worker, and is a highly dangerous operation. In addition, such a manual operation has been a major obstacle in promoting the automation of segment loading.

The present invention has been made in view of the above circumstances, and has as its object to provide a segment carrier that can automatically remove a pillow material used when stacking several segments. I do.

[0009]

In order to achieve the above object, according to the present invention, there is provided a segment carrier having a plurality of segments which can be stacked and transported via a predetermined pillow. A pair of side plates arranged so as to sandwich the segment from both sides on the upper side, a detachment arm rotatably attached to the side plate around a horizontal axis, and a drive mechanism for rotating the detachment arm. A pillow material removing mechanism comprising: a guide surface for slidably guiding and supporting the pillow material in accordance with the rotation of the detachment arm on the side plate, and the end of the segment at the end of the guide surface. The pillow material is provided with a retracting portion for retracting the pillow material when ascending and descending.

Further, according to a second aspect of the present invention, a plurality of segments are stacked via a predetermined pillow material, and the segments are sandwiched from both sides on a transportable carriage body. And a pillow material removing mechanism including a pair of side plates disposed so as to face each other, a detachable arm rotatably attached to the side plate around a horizontal axis, and a drive mechanism for rotating and driving the detachable arm. The pillow material is connected to the tip of an arm.

[0011]

In the segment transport cart of the present invention, after the upper segment is lowered in the shield shaft, the pillow material placed on the lower segment to support the upper segment is removed by the pillow material removing mechanism of the present invention. To remove. That is, the above-described drive mechanism is operated to rotate the detachment arm, and the torque is used to move the pillow material placed on the lower segment to the side. The pillow material initially moves on the upper surface of the lower segment, but is eventually replaced on the side plate, and then slides on the guide surface while being guided by the guide surface formed on the side plate, and eventually forms at the end of the guide surface. Move to the saved shelter. After removing the pillow material from above the lower segment in this way, the lower segment is lowered from the bogie main body, and is transported further forward as necessary.

In the segment carrier of the present invention, the drive mechanism is operated to rotate the detachment arm, as described above. Then, the pillow material connected to the distal end of the detachment arm also rotates in accordance with the movement of the detachment arm, and is eventually removed from the lower segment. After removing the pillow material in this manner, the lower segment is lowered from the bogie main body, and is transported further forward as necessary.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a segment carrier according to an embodiment of the present invention. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

(First Embodiment) FIGS. 1 and 2 are a front view and a plan view, respectively, of a segment carrier 11 according to this embodiment. As you can see in these figures,
The pedestal 8 is installed on the trolley main body 10 of the segment transport trolley 11 of this embodiment, and the upper tier 1a and the lower tier 1b formed of reinforced concrete or the like can be stacked on the pedestal 8 in two stages. ing. In the center of each of the segments 1a and 1b, a gripping metal 6 for an erector is screwed into a hole 7 formed on the inner surface thereof, and a pillow material 51 is provided between the segments 1a and 1b to protect the metal. It is sandwiched. Also,
Wheels 9 are provided below the bogie main body 10 so that the vehicle can travel on a track (not shown) laid in a shield shaft.

In addition, the segment carrier 11 of the present embodiment
The pillow material removing mechanism 12 for removing the pillow material 51 placed on the lower segment 1b is provided in front of and behind the bogie main body 10, respectively.

The pillow material removing mechanism 12 includes a pair of side plates 13 opposed to each other so as to sandwich the segment 1a and the segment 1b from both sides, and a removing arm attached to the side plates 13 so as to be rotatable around a horizontal axis. 14 and a drive mechanism 15 for rotating and driving the detaching arm 14. A guide surface 17 is formed on the side plate 13 to guide and support the pillow material 51 slidably in accordance with the rotation of the detaching arm 14. The segment 1b is provided at the end of the guide surface 17.
Evacuating section 16 for evacuating the pillow material 51 when moving up and down
Is formed. The rods 52 are provided at both ends of the pillow material 51.
The rod 52 receives the torque of the removal arm 14 and slides on the guide surface 17. The body length of the pillow material 51 is slightly shorter than the interval between the side plates 13. It is formed.

The drive mechanism 15 is equipped with a motor 21 and a torque limiter 22, and a rotating shaft of the motor 21 is connected to a shaft 23 via the torque limiter 22,
A sprocket 30 fixed to the shaft 23 is connected via a chain 24 to a sprocket 25 fixed to a shaft 26 disposed between the side plates 13, 13, and sprockets 27 fixed to both ends of the shaft 26.
Remove the chain 28 from the sprocket 29 of the arm 14
Are connected via. Note that the driving method of the motor 21 may be appropriately selected from electric, hydraulic, pneumatic, and the like.

In the segment transport trolley 11 of this embodiment, first, the segments 1 manufactured in the segment yard on the ground are stacked in two stages via a pillow material 51, and they are hung down on the shaft 3 to be transferred to the segment transport trolley 11. Put on. Next, the two-tiered segments 1a and 1b are transported into the shield shaft. FIG. 3A shows a state in which the segment 1a and the segment 1b are stacked in two steps on the segment carrier 11.

Next, the upper segment 1a in the shield mine
Is transported to the segment assembling mechanism further forward by the segment supply mechanism 5 (FIG. 3B).

Next, the pillow material 51 placed on the lower segment 1b in order to support the upper segment 1a is removed using the pillow material removing mechanism 12. That is, the drive mechanism 15 is operated to rotate the removal arm 14, and the torque is used to move the pillow material 51 placed on the lower segment 1b to the side (FIG. 4 (a)). The pillow material 51 initially moves on the upper surface of the lower segment 1b, but is eventually replaced on the side plate 13 and continuously guided by the guide surface 17 formed on the side plate 13 as shown by an arrow in FIG. The sliding surface 17 moves to the retracting portion 16 formed at the end of the guide surface 17. The pillow material 51
Is locked to the retracting portion 16, the torque limiter 22 operates to limit the torque transmitted to the detachment arm 14.

After the pillow material 51 is removed from the lower segment 1b in this manner, the lower segment 1b is lowered from the bogie main body 10 as shown in FIG. Conveyed to.

After the segment 1b is lowered, the segment carrier 11 is returned to the entrance of the shield shaft, and the above procedure is repeated. The pillow material 51 is lifted up on the ground as needed, and is reused when two-tiered in the ground yard.

As described above, according to the segment carrier of this embodiment, the pillow material placed on the lower segment is automatically removed using the pillow material removing mechanism without manual operation. The work efficiency in the removal of materials has increased, and work in narrow places has been eliminated.
Worker safety is improved. In addition, by automating the removal of the pillow material, it is possible to automate all the processes related to the segment loading.

Further, since the guide surface is formed on the side plate and the pillow is moved along the guide surface, the power of the motor can be relatively small.

(Second Embodiment) Next, a segment carrier according to a second embodiment will be described. Note that the same reference numerals are given to components and the like that are substantially the same as those in the first embodiment, and description thereof will be omitted.

FIG. 5A is a front view showing a segment carrier 61 according to the second embodiment. As can be seen from the drawing, similarly to the first embodiment, the segment carrier trolley 61 of this embodiment can stack the upper segment 1a and the lower segment 1b on the trolley body 10 via the pillow material 51 in two stages. And a pillow material removing mechanism 62 for removing the pillow material 51 placed on the lower segment 1b.
0 in front and behind, respectively.

As in the first embodiment, the pillow material removing mechanism 62 has a pair of side plates 63 opposed to each other so as to sandwich the segment 1a and the segment 1b from both sides, and rotates about the horizontal axis on the side plates 63. It comprises a detachable arm 14 freely attached and a drive mechanism 15 for rotating the detachable arm 14. Unlike the first embodiment, the distal end of the detachable arm 14 is provided at both ends of the pillow material 51. And the side plate 63 has no guide surface.

In the segment transport trolley 61 of this embodiment, first, the segments 1 manufactured in the segment yard on the ground are hung down on the shaft 3 and loaded on the segment transport trolley 61, which is referred to as a segment 1b. Then
The drive mechanism 15 of the pillow material removing mechanism 62 is operated in the reverse direction to rotate the removal arm 14 to the mounting side, and the pillow material 51 is set on the segment 1b. Next, another segment 1 is stacked from above to form a segment 1a. Note that a lift may be installed in the shaft, the segment carrier may be moved up and down by the lift, and the entire two-stage segment carrier on the ground may be suspended in the shaft. In such a configuration, it is possible to save the trouble of hanging down the segments one by one in the shaft.

Next, as in the first embodiment, the two-stage stacked segments 1a and 1b are transported into a shield shaft, and the upper segment 1a is lowered at a predetermined position.
The drive mechanism 15 is operated to rotate the detachment arm 14, and the torque is used to rotate the pillow material 51 placed on the lower segment 1b (FIG. 5B). After removing the pillow material 51 from above the lower segment 1b in this manner, as shown in FIG.
It is lowered from 0 and transported by the segment supply mechanism 5 to the further forward segment assembly mechanism.

After the segment 1b is lowered, the segment carrier 61 is returned to the entrance of the shield shaft, and the above procedure is repeated.

As described above, according to the segment carrier of this embodiment, the pillow material placed on the lower segment is automatically removed using the pillow material removing mechanism without manual operation. The work efficiency in the removal of materials has increased, and work in narrow places has been eliminated.
Worker safety is improved. In addition, by automating the removal of the pillow material, it is possible to automate all the processes related to the segment loading.

Further, according to the present embodiment, the pillow material is connected to the tip of the detaching arm, and the pillow material is rotated in accordance with the rotation of the detaching arm, so that the total amount of the pillow material is reduced. It has the effect of being able to do so. In the case of the second embodiment, in order to pivot the pillow material completely away from the side plate,
It is preferable to use a motor having a larger power than in the first embodiment.

When the length of the shield shaft is short,
Because there is some time in the segment transport process,
In the case where the required amount of pillow material is reduced by using the segment carrier truck of the embodiment and the excavation progresses and the shield pit becomes longer, and the segment carrier process becomes critical in the entire process, the first implementation The loading time may be reduced using the example segment carrier.

[0034]

As described above, the segment transport cart according to the present invention faces a truck body capable of stacking a plurality of segments via a predetermined pillow material and transporting the segments from both sides. A pair of side plates disposed, a detachment arm attached to the side plate so as to be rotatable around a horizontal axis, and a pillow material removal mechanism including a drive mechanism that drives the removal arm to rotate, the side plate includes A guide surface for slidably guiding and supporting the pillow material is formed in accordance with the rotation of the detachment arm, and the pillow material is retracted at the end of the guide surface when the segment is raised and lowered. Since the shunting portion is formed, the pillow material used when stacking the segments in several layers can be automatically removed.

[0035] Further, the segment transport trolley of the present invention comprises a pair of side plates which are opposed to each other so as to sandwich the segments from both sides on a truck body capable of stacking a plurality of segments via a predetermined pillow material and transporting the segments. A detachable arm that is rotatably attached to the side plate around a horizontal axis, and a pillow material removing mechanism that includes a drive mechanism that rotationally drives the detachable arm, and the pillow material is attached to a tip of the detachable arm. Because of the connection, the pillow material used for stacking the segments several times can be automatically removed.

[0036]

[Brief description of the drawings]

FIG. 1 is a front view of a segment transport trolley according to a first embodiment.

FIG. 2 is a plan view of the same.

FIG. 3A is a diagram illustrating a state in which the segments are stacked in two stages on the segment transport vehicle according to the present embodiment, and FIG. 3B is a diagram illustrating a manner in which the upper segment is lowered.

FIG. 4A is a view showing a state in which a pillow material removing mechanism is operated to remove a pillow material on a lower segment, and FIG. 4B is a view showing a state in which the lower segment is lowered.

FIG. 5 (a) is a front view showing a segment carrier truck according to a second embodiment, and FIG. 5 (b) is a diagram showing its operation.

FIG. 6 is a diagram showing a procedure for transporting segments according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a, 1b Segment 10 Bogie main body 11, 61 Segment transport trolley 12, 62 Pillow material removal mechanism 13, 63 Side plate 14 Removal arm 15 Drive mechanism 16 Evacuation part 17 Guide surface 51 Pillow material

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Chiharu Shimizu 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Yoshifumi Fukawa 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Main Office (72) Inventor Yukiyoshi Inoue 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Main Office (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11/40

Claims (2)

(57) [Claims] 1. A pair of side plates arranged so as to sandwich a plurality of segments from both sides on a truck body capable of stacking and transporting the plurality of segments via a predetermined pillow material,
A pillow material removing mechanism including a detachable arm attached to the side plate so as to be rotatable around a horizontal axis, and a drive mechanism for driving the detachable arm to rotate; the side plate is adapted to the rotation of the detachable arm; A guide surface for slidably guiding and supporting the pillow material, and a retracting portion for retracting the pillow material when the segment is raised and lowered is formed at the end of the guide surface. And a segment transport trolley. 2. A pair of side plates disposed on opposite sides of a bogie main body capable of stacking and transporting a plurality of segments via a predetermined pillow material so as to sandwich the segments from both sides,
A detachable arm that is attached to the side plate so as to be rotatable around a horizontal axis, and a pillow material removing mechanism that includes a drive mechanism that rotationally drives the detachable arm, and connects the pillow material to a tip of the detachable arm. A segment transport trolley comprising: