JP7231441B2 - Segment transshipment method and segment transshipment device - Google Patents

Description

The present invention relates to a segment transshipment method and a segment transshipment device.

A shield tunnel is formed by continuously arranging segment rings assembled in a shield machine while excavating the natural ground. The segment pieces that make up the segment ring are brought into the face from the tunnel mouth side as the shield machine advances.
Segment pieces are generally brought in from a segment manufacturing factory or the like and stored in a stock yard or the like, and carried into the tunnel pit ring by ring as the tunnel is excavated. However, in tunnels in urban areas, large cross-section tunnels in which many segment pieces are used for each ring, etc., it may not be possible to secure a stock yard near the portal. In addition, it is common to use a gate-type crane to unload the segment pieces that have been brought in and to load them onto the segment carts that transport the segment pieces in the mine. We had to secure the land.
Patent Literature 1 discloses a three-dimensional automated warehouse that temporarily stores segment pieces brought in by a trailer or the like, and then loads them onto a segment cart provided at an exit using a segment lifting device. By storing segment pieces in the depth direction of the shaft, the multi-level automated warehouse makes it possible to reduce the space in the stockyard. In addition, the segment hoisting device travels along the trolley garter, thereby making it possible to sequentially load the segment pieces onto a plurality of connected segment trucks.

Japanese Patent Application Laid-Open No. 2001-193400

Since the segment pieces that make up the segment ring include A segment, B segment, K segment, etc., which have different shapes, it is necessary to load, unload, and store each segment piece separately, which is troublesome to manage. In addition, in the multi-level automated warehouse of Patent Document 1, the segment pieces brought in from the manufacturing factory or the like are separately loaded and unloaded from the trailer and loaded onto the segment trolley, so transshipment work is time-consuming. In addition, since the segment pieces are sequentially loaded onto a plurality of segment carts, the loading operation also takes time. On the other hand, if the segment pieces brought in by the trailer can be directly reloaded onto the segment cart, the stockyard space can be saved, and the labor required for storing the segment pieces can be saved, which is efficient. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to propose a segment transshipment method and a segment transshipment device that enable efficient transshipment of transported segment pieces from a trailer to a segment truck.

The present invention for solving the above problems is a segment transshipment method for transshipping segment pieces brought in by a plurality of trailers onto the same number of segment trucks as the trailers, and a segment transshipment device used for this method.
The segment replacement method includes a device arranging step of arranging a lift device on the side of a plurality of trailers stopped in parallel on a loading and unloading lane, and a step of moving the lift device forward to move the fork portion of the lift device to the trailer. After inserting the segment pieces under the loaded segment pieces, a loading step of raising the fork portion, a trailer evacuation step of moving the trailer, and a plurality of the segment trucks arranged in tandem on the loading/unloading lane. A carriage arrangement step, a device rearrangement step of laterally moving the lift device to arrange the lift device on the side of the segment carriage, moving the lift device forward and lowering the fork portion to remove the segment piece It includes a loading step of loading onto the segment truck and a device retreating step of retreating the lift device.
In addition, the segment transshipment device of the present invention comprises a plurality of lift devices arranged side by side. It has a horizontally movable main body and a fork provided on the main body so as to be vertically movable. The plurality of body parts move back and forth in synchronization.

According to the segment reloading method and the segment reloading device, the unloading of the segment pieces from the trailer and the loading and unloading of the segment pieces onto the segment truck are continuously performed using the same device, which is efficient. In other words, the time and effort required for loading and unloading segment pieces from trailers and loading segment pieces onto segment carts can be greatly reduced compared to conventional segment transshipment methods that use different devices at different locations. can be done. In addition, since a plurality of segment pieces transported by a plurality of trailers can be reloaded onto the segment truck at the same time, the time required for loading can be greatly reduced.

According to the segment transshipment method and the segment transshipment device of the present invention, the unloading of the segment pieces from the trailer and the loading and unloading of the segment pieces onto the segment truck are performed continuously using the same device. It is possible to greatly reduce the labor and time required for transshipment of the segment pieces to.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows the segment transshipment apparatus which concerns on embodiment of this invention, (b) is a front view. FIG. 3 is a perspective view showing a lift device of the segment transshipment device; It is a side view which shows an apparatus arrangement|positioning process. It is a side view which shows a loading process. It is a side view which shows a device retreat process. It is a side view which shows a truck arrangement process. It is a front view which shows a device rearrangement process. It is a side view which shows a loading process. It is a front view which shows a segment truck.

In this embodiment, when a tunnel is constructed by the shield construction method, the segment pieces 1 constituting the segment ring are temporarily placed by directly transferring them from the trailer 2 to the segment truck 3 at the tunnel portal _TE . A case will be described in which the yard (stock yard) is omitted or reduced and the construction period is shortened.
In this embodiment, the segment pieces 1 brought into the tunnel portal _TE from the outside of the tunnel by a plurality of trailers 2 are transferred to the same number of segment trucks 3 as the trailers 2 by using the segment transfer device 4 . In this specification, front, back, left, and right are based on the moving direction of the segment transshipment device 4 . In this embodiment, front and rear are directions perpendicular to the tunnel axial direction (tunnel transverse direction), and left and right are directions along the tunnel axial direction.

In this embodiment, segment pieces 1 for one ring are transported from the outside of the tunnel to the tunnel portal _TE using a plurality of trailers 2 . In this embodiment, as shown in FIGS. 1(a) and 1(b), segment pieces 1 for one ring are transported two by two by three trailers 2 (six pieces in total). The two segment pieces 1 are loaded on a trailer 2 in a state of being vertically stacked. The number of trailers 2 used to carry in the segment pieces 1 for one ring is not limited, and the number, shape, weight, etc. of the segment pieces 1 set according to the cross-sectional shape of the tunnel, etc. It can be determined as appropriate. Also, the number of segment pieces 1 to be loaded on one trailer 2 is not limited, and may be determined as appropriate.

The segment transfer device 4 has the same number (three) of lift devices 5 as the number of trailers 2 . As shown in FIG. 2, the lift device 5 includes a movable platform 51 that moves (horizontally moves) in the tunnel axial direction, and a main body 52 that moves (forward and backward) on the movable platform 51 in a direction intersecting the tunnel axial direction. , and a fork portion 53 provided on the main body portion 52 so as to be vertically movable. That is, the main body portion 52 moves left and right by the movable base 51 and moves forward and backward on the movable base 51 .
The mobile platform 51 can move straight along the tunnel axis direction. The traveling means of _such a movable platform 51 is not limited. The movable platform 51 is equipped with a power source (not shown) for the main body 52 and the fork 53, and a control panel (not shown) for controlling the direction and amount of movement. The configuration of the lift device 5 is not limited, and the power source and control panel, for example, do not necessarily have to be mounted on the movable platform 51 .

The body portion 52 can move straight on the movable platform 51 in a direction crossing the axial direction of the tunnel. Although the means for moving the main body 52 on the movable platform 51 is not limited, for example, it may be configured to run on rails _R2 laid on the movable platform 51 . The body portion 52 of the present embodiment has a rectangular shape in a front view and a triangular shape in a side view by combining steel materials. In addition, the shape of the main body part 52 is not limited, and may be, for example, a rectangular parallelepiped shape.
The fork portion 53 is provided on the front surface of the main body portion 52 so as to be vertically movable. In this embodiment, two fork portions 53 are arranged side by side. The fork portion 53 is L-shaped in a side view by combining a vertical member and a horizontal member. The pair of fork portions 53 move up and down in synchronism with vertical members sliding along the front surface of the body portion 52 . Note that the configuration of the fork portion 53 is not limited, and does not necessarily have to be L-shaped.

When transshipping the segment pieces 1, first, as shown in _FIGS . Parallel stop in unloading lane _L1 . At this time, the central trailer 2 stops so as to be positioned in the center of the loading/unloading lane _L1 . A segment transfer device 4 is arranged on one side of the loading/unloading lane _L1 . The three lift devices 5 of the segment transfer device 4 are arranged side by side along the loading/unloading lane _L1 , as shown in FIG. 1(a).
After the trailers 2 are stopped at the loading/unloading lane _L1 , the lift devices 5 are laterally moved as necessary and arranged beside each trailer 2 as shown in FIG. 3 (device placement step). Alternatively, the lift device 5 may be placed at a predetermined position in advance, and the trailer 2 may be stopped in front of the lift device 5 .
Here, on the opposite side of the segment transshipment device 4 across the loading/unloading lane _L1 , there is secured a travel lane _L2 for vehicles for supplying materials and equipment to the mine, mixer trucks, etc. . The loading/unloading lane _L1 and the travel lane _L2 do not necessarily have to be separated. For example, if it is difficult to secure the loading/unloading lane _L1 due to the tunnel cross-sectional dimension, the travel lane _L2 may be temporarily used as the loading/unloading lane _L1 .

Next, as shown in FIG. 4, each lift device 5 is advanced. At this time, the fork portion 53 is positioned at a height corresponding to the clearance between the loading platform of the trailer 2 and the lower surface of the segment piece 1 . Since the segment piece 1 is arc-shaped, when placed on the bed of the trailer 2, a gap is formed between both ends of the lower surface of the segment piece 1 and the upper surface of the bed. Therefore, when the lift device 5 is moved forward, the fork portion 53 is inserted into the gap below the segment piece 1 placed on the trailer 2 . In addition, the three lift devices 5 (body portions 52) move forward synchronously. At this time, the operation of the segment transshipment device 4 is manually performed by the operator using the controller. The operator preferably operates the segment transshipment device 4 while visually observing the vicinity of the segment transshipment device 4 . The lift device 5 is equipped with a non-contact distance sensor (not shown) and can measure the positional relationship with the trailer 2 or the segment piece 1 loaded on the trailer 2 . A distance sensor is connected to the control board. The control panel controls forward movement of the lift device 5 according to the measurement result of the distance sensor. That is, when it is determined that the trailer 2 or the segment piece 1 is inclined with respect to the lift device 5 (not parallel to the tunnel axis direction), the forward movement of the lift device 5 is disabled. This prevents the segment piece 1 from being lifted obliquely. Further, even when it is determined that there is a possibility of contact between the fork portion 53 and the segment piece 1 based on the measurement result of the distance sensor, the forward movement of the lift device 5 is stopped by the control panel. In this case, the operator operates the controller to laterally move the body portion 52 or vertically move the fork portion 53 to adjust the position. The lift device 5 may move the main body 52 laterally and move the fork portion 53 up and down according to the measurement result of the distance sensor to automatically adjust the position.

After the fork portion 53 is inserted under the segment piece 1, the segment piece 1 is lifted from the loading platform of the trailer 2 by raising the fork portion 53 (unloading step). Since the three lift devices 5 operate synchronously, the segment pieces 1 can be unloaded from the three trailers 2 at the same time.
After the segment piece 1 is lifted by the fork portion 53, the lift device 5 is retracted as shown in FIG. 5 (device retraction step). At this time, the three lift devices 5 (body portions 52) are synchronously retreated.
In this embodiment, automatic control is performed with the fork portion 53 inserted under the segment piece 1 . When the automatic control switch is operated in the controller, the segment piece 1 is automatically picked up by the fork portion 53 and the lift device 5 is automatically moved backward.
After confirming that the lift device 5 has retreated, the trailer 2 is moved from the loading/unloading lane _L1 (trailer evacuation step).

After the trailer 2 is moved, as shown in FIGS. 6 and 7, the segment trucks 3 are arranged in series at fixed positions on the loading/unloading lane _L1 (carriage arrangement step). The number of segment trucks 3 is the same as the number of trailers 2 (three in this embodiment). Note that the segment carriage 3 may be connected to a carriage for transporting other materials. At this time, the central segment truck 3 is arranged so as to be positioned in the center of the loading/unloading lane _L1 . The three segment trucks 3 are connected to each other and are moved by power of a traction vehicle (battery loco, etc.) 31 .
After confirming that the segment carriage 3 has been placed at the predetermined position, as shown in FIG. 7, the lift device 5 is laterally moved to arrange the lift device 5 on the side of the segment carriage 3 (device rearrangement step). . Since the segment truck 3 has a smaller vehicle length than the trailer 2, the lift devices 5 are arranged on the sides of the respective segment trucks 3 by bringing the left and right lift devices 5 closer to the center lift device 5. - 特許庁At this time, the lift device 5 confirms the distance to the segment carriage 3 by the distance sensor, and automatically adjusts the position according to the measurement result of the distance sensor. The position adjustment of the lift device 5 may be manually performed by an operator operating a controller.

After the lift device 5 is arranged on the side of the segment truck 3, the lift device 5 is moved forward to arrange the fork portion 53 supporting the segment piece 1 above the segment truck 3, as shown in FIG. At this time, the three lift devices 5 (body portions 52) move forward synchronously. Subsequently, the segment piece 1 is mounted on the segment truck 3 by lowering the fork portion 53 (loading step). That is, segment pieces 1 are simultaneously loaded onto three segment trucks 3 .
After the segment piece 1 is placed on the segment carriage 3, the fork portion 53 is further lowered to release the contact between the fork portion 53 and the segment piece 1, and the lift device 5 is retracted (device evacuation step). At this time, the three lift devices 5 (body portions 52) are synchronously retreated. Here, as shown in FIG. 9, the segment truck 3 has a concave portion 32 formed in the central portion thereof, and has a U-shaped shape when viewed from the side. When the segment piece 1 is placed on the segment truck 3 , the central portion of the segment piece 1 is inserted into the recess 32 of the segment truck 3 . A cushioning material 33 is provided at the corner between the upper surface of the segment carriage 3 and the recess 32 to prevent the segment piece 1 from being damaged. Further, the recessed portion 32 is provided with a cradle 34 for mounting the segment 1 thereon. When the segment piece 1 is placed on the segment carriage 3 , a gap is formed between both ends of the lower surface of the segment piece 1 and the upper surface of the segment carriage 3 .
In this embodiment, the loading process and the device evacuation process are automatically performed. When the automatic control switch is operated at the stage where the lift device 5 is arranged at a predetermined position, the forward movement of the lift device 5, the lowering of the fork portion 53, and the backward movement of the lift device 5 are automatically performed in succession. Note that the loading process and the device evacuation process may be performed manually by operating the controller.

The segment replacement method using the segment transfer device 4 of the present embodiment is efficient because the segment pieces 1 are unloaded from the trailer 2 and the segment pieces 1 are loaded onto the segment truck 3 continuously. That is, compared to the conventional segment transshipment method in which the loading and unloading of the segment pieces 1 from the trailer 2 and the loading and unloading of the segment pieces 1 onto the segment truck 3 are performed at different locations and using different devices, the time and effort are greatly reduced. can be reduced to In addition, since a plurality of segment pieces 1 transported by a plurality of trailers 2 can be reloaded onto the segment truck 3 at the same time, the time required for loading can be greatly reduced.
In addition, since the lift devices 5 are driven synchronously, they can be operated by a single operator. In the conventional transshipment method using a crane or the like, it is necessary to arrange a worker who performs slinging and an operator who operates the crane for each trailer 2, but according to the segment transshipment method of the present embodiment, the worker ( operators) can be reduced. Therefore, by reducing labor costs, it is possible to reduce construction costs.

In addition, since the segment piece 1 is directly lifted by the fork portion 53 of the lift device 5, slinging work is unnecessary. Therefore, the labor required for slinging can be omitted, and the safety is enhanced.
Furthermore, since the lift device 5 can be automatically controlled, the burden on the operator can be reduced.
Since the lift device 5 can move in the front-rear direction and the left-right direction, it is possible to use trailers 2 of different sizes for each vehicle, or to transfer segment pieces 1 between trailers 2 and segment trucks 3 of different sizes. Even if there is, you can work.

Although the embodiments according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and the constituent elements described above can be changed as appropriate without departing from the scope of the present invention.
In the above-described embodiment, the lift device 5 is laterally moved by the movable platform 51, but the movable platform 51 may be installed as required. For example, if the loading platform of the trailer 2 and the segment carriage 3 are stopped at respective preset positions, the main body 52 runs on rails laid on the floor slab, and the movable platform 51 is omitted. may
In the above-described embodiment, a case was described in which a device retraction process was provided. The device retraction step may be omitted.

REFERENCE SIGNS LIST 1 segment piece 2 trailer 3 segment cart 4 segment transshipment device 5 lift device 51 mobile platform 52 body portion 53 fork portion L ₁ loading/unloading lane

Claims (3)

A segment transshipment method for transshipping segment pieces brought in by a plurality of trailers onto the same number of segment trucks as the trailers,
a device arrangement step of arranging a lift device on each side of the plurality of trailers stopped in parallel on the loading/unloading lane;
a loading step of advancing the lift device, inserting the fork portion of the lift device under the segment piece placed on the trailer, and then raising the fork portion;
a trailer evacuation step of moving the trailer;
A truck arrangement step of arranging a plurality of segment trucks in tandem on the loading/unloading lane;
A device rearrangement step of laterally moving the lift device and arranging the lift device on the side of the segment truck;
a loading step of advancing the lift device and lowering the fork portion to load the segment piece onto the segment truck;
and a device retraction step of retracting the lift device. 2. A method according to claim 1, wherein the step of laterally moving said lifting devices includes bringing other said lifting devices close to said central lifting device. A segment transshipment device in which a plurality of lifting devices are arranged in parallel,
The lift device is
a mobile frame that moves horizontally in the tunnel axis direction;
a main body that horizontally moves in a direction intersecting the axial direction of the tunnel on the movable platform ;
a fork portion provided to the main body portion so as to be vertically movable,
A segment transshipment device, wherein the plurality of main bodies move back and forth in synchronism.

Images